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PTMEG 1000, also known as Polytetramethylene Ether Glycol 1000, PTMG 1000, PTHF 1000 and CAS No. 25190-06-1, is a linear polyether diol produced by the acid-catalysed polymerization of tetrahydrofuran, with the general formula HO–[CH2CH2CH2CH2O]n–H and an average molecular weight of about 1000 g/mol. PTMEG 1000 is used as the polyol component in high-performance polyurethane systems, in particular cast polyurethane elastomers, thermoplastic polyurethanes (TPU), prepolymers, spandex fibres, copolyester and polyether amide elastomers, adhesives and coatings.
PTMEG 1000 is a white, waxy solid at room temperature that begins to soften at about 24 °C and turns into a clear, colourless liquid when heated. The primary hydroxyl groups at both ends of PTMEG 1000 react with isocyanates to form the flexible soft segment of the polyurethane structure.
Polyurethanes made with PTMEG 1000 are preferred for parts operating under demanding conditions, such as in the automotive, machinery, mining, footwear and sporting goods sectors, thanks to their hydrolysis resistance, low-temperature flexibility, high rebound, low hysteresis and abrasion resistance. PTMEG 1000 helps reduce problems common in polyester-based systems, such as hydrolytic degradation, stiffening at low temperatures and loss of flexibility.
The hydroxyl number, water content, acid number, colour and viscosity of PTMEG 1000 are key parameters that directly affect product performance and formulation calculations. Since PTMEG 1000 is hygroscopic, it should be stored under dry nitrogen, melted without exceeding 60 °C and homogenized, while the safety requirements of the isocyanates and curatives used with it should be evaluated separately on the basis of their current SDSs.
WHAT IS PTMEG 1000?
PTMEG 1000 is a polyether diol obtained by ring-opening polymerization of tetrahydrofuran (THF) monomer, also known in the field of industrial chemistry by names such as Polytetramethylene Ether Glycol, Polytetramethylene Glycol, Poly(tetramethylene oxide), and Polytetrahydrofuran. PTMEG 1000 is identified by CAS No. 25190-06-1, and the "1000" in its name indicates that the average molecular weight of the product is approximately 1000 g/mol.
PTMEG 1000 is not a single pure molecule, but a mixture of polyether diols of different chain lengths; the average molecular weight of the product is determined by the hydroxyl number.
The PTMEG series is available in different molecular weights from approx. 220–250 g/mol to 3000 g/mol, with PTMEG 1000 and PTMEG 2000 being the most commonly used grades in this range.
PTMEG 1000 should not be confused with tetrahydrofuran; tetrahydrofuran is a volatile solvent and monomer that is the raw material of PTMEG 1000, while PTMEG 1000 is a non-volatile polymer produced from this monomer.
PTMEG 1000 should also not be confused with other polyether glycols such as polypropylene glycol (PPG) and polyethylene glycol (PEG); these products have different repeat units and different performance characteristics.
Not all PTMEG 1000 products on the market have the same technical values; hydroxyl number, molecular weight range, moisture content, color, acid number and viscosity may differ by manufacturer.
Therefore, it should not be assumed that products from different manufacturers are technically interchangeable based solely on the name "PTMEG 1000".
The performance of PTMEG 1000 depends not only on its chemical identity; it also depends on the moisture content of the product, storage conditions, melting method, isocyanate type, chain extender, and process conditions.
Therefore, the hardness, mechanical properties, and processability of polyurethane systems prepared with PTMEG 1000 can vary significantly based on the formulation.
COMMON PRODUCT and CHEMICAL NAMES:
PTMEG 1000
Polytetramethylene Ether Glycol 1000
PTMG 1000
PTHF 1000
PTMEG
PTMG
PTG
PTHF
PTMO
Polytetramethylene Ether Glycol
Polytetramethylene Glycol
Poly(tetramethylene ether) glycol
Poly(tetramethylene oxide)
Poly(tetramethylene oxide) glycol
Poly(oxytetramethylene) glycol
Polytetrahydrofuran
Polybutylene glycol
Poly(1,4-butanediol)
Poly(oxy-1,4-butanediyl)
α-Hydro-ω-hydroxypoly(oxy-1,4-butanediyl)
Tetrahydrofuran homopolymer
Some of these names refer to the chemical designation of PTMEG 1000, while others refer to the abbreviation or molecular weight grade of the product.
The abbreviations PTMEG, PTMG, PTG, PTHF, and PTMO describe the same family of polyether diols; the "1000" added to the name indicates the average molecular weight of the product.
The names polytetrahydrofuran and tetrahydrofuran homopolymer indicate that PTMEG 1000 is obtained by polymerization of tetrahydrofuran.
The name α-Hydro-ω-hydroxypoly(oxy-1,4-butanediyl) is the systematic chemical name that describes the structure of PTMEG 1000, which consists of repeating oxybutylene units with hydroxyl groups at both ends.
The CAS number used for PTMEG 1000 is common to all molecular weight grades of the PTMEG series.
Therefore, when purchasing, one should not only look at the CAS number, but also at the hydroxyl number and molecular weight range of PTMEG 1000.
CAS NO, EC / EINECS NO AND CHEMICAL IDENTIFICATION
Product Name: PTMEG 1000 / Polytetramethylene Ether Glycol 1000
Common abbreviations: PTMEG, PTMG, PTHF, PTG, PTMO
Chemical name: Polytetramethylene ether glycol
CAS name: α-Hydro-ω-hydroxypoly(oxy-1,4-butanediyl)
CAS No: 25190-06-1
EC/EINECS No: Not commonly listed as it is a polymer; should be checked in supplier documentation
General formula: HO–[CH2CH2CH2CH2O]n–H
Molecular weight: Average around 1000 g/mol (typical range 950–1050 g/mol)
Chemical class: Polyether diol/polyether polyol
Main function: Soft segment component in polyurethane, copolyester and polyether amide elastomers
PTMEG 1000 is not defined by a single fixed molecular formula and molecular weight like pure chemical compounds; PTMEG 1000 is a mixture of polyether diols of different chain lengths.
The average molecular weight of PTMEG 1000 is calculated from the hydroxyl number, and therefore the hydroxyl number is the most important defining parameter for PTMEG 1000.
For PTMEG 1000, CAS No 25190-06-1 is used; this number also applies to other grades such as PTMEG 250, PTMEG 650, PTMEG 1400, PTMEG 2000 and PTMEG 3000.
In some chemical databases, the formula, molecular weight, or EC number of a single small molecule for PTMEG may be seen; such records should be carefully considered as they may not reflect the polymer structure of PTMEG 1000.
When calculating with PTMEG 1000, the hydroxyl number and the corresponding equivalent weight of the product should be taken as a basis.
This value is critical for accurately calculating the amount of isocyanates, the NCO/OH ratio, and the amount of chain extenders.
The purity of PTMEG 1000 can be stated in manufacturer safety data sheets at over 99.5 percent.
It should be noted that low amounts of antioxidants can be added to PTMEG 1000 to ensure stability against thermal and oxidative degradation, and the exact composition of the product should be checked from the supplier's TDS, SDS and COA documents.
CHEMICAL STRUCTURE AND MOLECULAR PROPERTIES OF PTMEG 1000
PTMEG 1000 has a linear polyether chain formed by successive bonding of tetramethylene ether units (–CH2CH2CH2CH2O–).
PTMEG 1000 has a hydroxyl (–OH) group at each end of the chain and therefore PTMEG 1000 behaves as a bifunctional diol.
The end groups of PTMEG 1000 are all primary hydroxyl groups; this helps PTMEG 1000 react with isocyanates in a consistent and predictable manner.
The molecular weight distribution in PTMEG products is moderate, indicated in the range of approximately 1.8–2.1.
The linear and regular chain structure of PTMEG 1000 allows crystallization under tension in polyurethane.
This property is an important structural feature that contributes to the high tensile strength of PTMEG 1000-based elastomers.
The glass transition temperature of PTMEG-based soft segments is around -75 °C; this value is lower than the value of polypropylene glycol-based soft segments, which is about -65 °C.
This low glass transition temperature helps PTMEG 1000-based polyurethanes maintain their flexibility at low temperatures.
PTMEG 1000 has ether bonds in its main chain instead of ester bonds.
The fact that ether bonds are more resistant to water breakdown than ester bonds is the basis for the hydrolysis resistance of PTMEG 1000-based polyurethanes.
The molecular weight of PTMEG 1000 directly affects the hardness and flexibility of the resulting polyurethane.
Lower molecular weight grades generally provide easier processing and higher hardness, while higher molecular weight grades offer higher elasticity and low-temperature flexibility.
PHYSICAL AND CHEMICAL PROPERTIES OF PTMEG 1000
PTMEG 1000 exists as a white, waxy solid at room temperature and transforms into a clear, colorless liquid when heated.
The physical appearance of PTMEG 1000 can vary from liquid to waxy solid, depending on the ambient temperature.
General technical specifications:
Physical appearance: White, waxy solid at room temperature; clear and colorless liquid in molten state
Odor: Not distinctive
Chemical character: Linear polyether diol
CAS No: 25190-06-1
Molecular weight: 950–1050 g/mol
Hydroxyl number: Approximately 106.9–118.1 mg KOH/g
Acid number: Not more than 0.05 mg KOH/g
Water content: Up to approx. 100–200 ppm depending on the manufacturer
Color: Up to about 25–50 APHA, depending on the manufacturer
Carbonyl ratio: Up to 0.5 (in some manufacturer specifications)
Viscosity (40 °C): Approx. 240–360 mPa·s
Density (40 °C): Approx. 0.975–0.981 g/cm³
Softening/melting point: Softening starting at about 24 °C; no sharp melting point
Flash point: Between approx. 259 °C and over 280 °C, depending on the manufacturer
Boiling point: above 204 °C
Solubility: Slightly soluble in water; soluble in aromatic and chlorinated solvents
Moisture behavior: Hygroscopic
Stability: Stable under recommended conditions; can degrade on contact with air and oxygen
Incompatible substances: Acids and oxidizing agents
PTMEG 1000 does not have a sharp melting or solidification point; the product begins to soften from about 24 °C and turns into a low viscosity liquid around 38 °C.
PTMEG 1000 can have a tendency to supercool, meaning that even if the molten product cools below its melting temperature, it can remain in a liquid state for some time.
The hydroxyl number is the most important quality parameter of PTMEG 1000; because the equivalent weight of PTMEG 1000 and the isocyanate requirement in the formulation are calculated based on this value.
Water content is also a critical parameter for PTMEG 1000; because water can react with isocyanates, leading to the formation of bubbles and disruption of formulation equilibrium.
The acid number, color, and carbonyl ratio provide information about the purity of PTMEG 1000 and whether it degrades during storage.
The viscosity value is important for pumping, mixing and feeding the PTMEG 1000 into the process and should be evaluated in conjunction with the measuring temperature.
These values are for general technical information; they should not be used as a binding specification of the product to be purchased.
In particular, parameters such as hydroxyl number, molecular weight, water content, acid number, color and viscosity should be checked through the supplier's current TDS and COA documents.
HOW DOES PTMEG 1000 WORK AT THE MOLECULAR LEVEL?
The primary function of PTMEG 1000 in polyurethane systems is that the hydroxyl groups at its two ends react with isocyanate groups to form urethane bonds, imparting a flexible soft segment to the polymer chain.
PTMEG 1000 is usually first reacted with a diisocyanate to form a prepolymer with free NCO groups at the ends, then this prepolymer is reacted with a chain extender or curing agent to produce the final product.
In the polyurethane structure formed, the long and flexible polyether chains from PTMEG 1000 form the soft segments, and the sections from the isocyanate and chain extender form the hard segments.
Soft segments give the material flexibility, elongation, and low-temperature performance, while hard segments provide hardness, strength, and thermal resistance.
The linear chain of PTMEG 1000 can crystallize under stress, forming a regular structure.
This crystallization behavior under stress contributes to the high tensile strength and good mechanical properties of PTMEG 1000-based elastomers.
The ether bonds in the main chain of PTMEG 1000 are not easily broken down by water.
Therefore, PTMEG 1000-based polyurethanes can maintain their mechanical properties better in humid and hot environments compared to polyester-based polyurethanes containing ester bonds.
The soft segments of PTMEG 1000 with a low glass transition temperature help the material to remain flexible even at low temperatures.
The low hysteresis of PTMEG 1000-based elastomers means less heat build-up and higher rebound under repeated loading.
Possible functions of PTMEG 1000 in polyurethane and other elastomer systems:
Creating a soft segment in polyurethane structure
To participate in the production of prepolymers by reacting with isocyanates
Giving elasticity and elongation to the elastomer
Enhancing hydrolysis resistance
Maintaining low-temperature flexibility
Improving rebound and dynamic performance
Ensuring low hysteresis
Contributing to abrasion and tear resistance
Acting as a soft segment component in copolyester and polyether amide elastomers
To provide resistance to fungal and microorganism action
The performance of PTMEG 1000 depends on the type of isocyanate used, NCO/OH ratio, chain extender or curative, hard segment ratio and process temperatures.
Therefore, the result of PTMEG 1000 in one system cannot be directly transferred to another system, and each formulation must be validated by laboratory trials.
IN WHICH SECTORS IS PTMEG 1000 USED?
PTMEG 1000 is an important polyol used in the production of high-performance polyurethanes and elastomers thanks to its hydrolysis resistance, low temperature flexibility, high rebound, abrasion resistance and good mechanical properties.
The intended use of PTMEG 1000 may vary depending on the quality of the product, the formulation system, and the targeted end-product properties.
Main areas of use:
Cast polyurethane elastomers
Polyurethane prepolymers
Thermoplastic polyurethane (TPU)
Thermoset polyurethane elastomers
Polyurethane resins
Spandex (elastane) fibers
Copolyester ether elastomers (TPEE)
Polyether amide elastomers
Polyurethane adhesives and sealants
Polyurethane coatings and paints
Faux leather and faux suede
Protective films and interlayers
PTMEG 1000 is most commonly used in cast polyurethane elastomers, prepolymers, TPUs, and copolyester ether elastomers.
Adhesives, coatings, and spandex fibers are also among the areas where PTMEG 1000 can be evaluated; however, higher molecular weight PTMEG grades are generally preferred as standard in spandex fibers.
The main sectors using PTMEG 1000 are automotive, machinery and industrial equipment, mining and oil field, TPU granule production, adhesive and coating production, footwear and leather, textiles and sports equipment.
The performance that each industry expects from PTMEG 1000 is different; for example, an industrial parts manufacturer can emphasize abrasion and tear resistance, a TPU manufacturer can emphasize processability and consistent reaction, and a shoe and sporting goods manufacturer can emphasize flexibility and rebound.
USE OF PTMEG 1000 IN THE PRODUCTION OF POLYURETHANE ELASTOMERS
In the production of polyurethane elastomers, PTMEG 1000 is used as the main polyol component in prepolymer systems.
PTMEG 1000 is reacted with diisocyanates to form a prepolymer with free NCO groups at the ends, which is then reacted with chain extender or curing agent to become an elastomer.
Commonly evaluated combinations in PTMEG 1000-based elastomer systems:
PTMEG 1000 / TDI prepolymer + MOCA curative
PTMEG 1000 / MDI prepolymer + 1,4-butanediol (BDO) chain extender
PTMEG 1000 / MDI prepolymer + HQEE chain extender
PTMEG 1000 / HMDI prepolymer + MDA curative
PTMEG 1000 systems based on TDI and MOCA can provide overall toughness, abrasion and tear resistance, and good oil resistance over a wide hardness range from approximately 75 Shore A to 68 Shore D.
MDI and BDO-based PTMEG 1000 systems, on the other hand, can offer hydrolysis resistance, low-temperature flexibility, rebound and impact wear resistance close to TDI systems of equal hardness, but may require higher shear mixing.
The HMDI and MDA-based PTMEG 1000 systems can be considered in applications where high UV resistance and maximum hydrolysis stability are required.
The hardness of PTMEG 1000-based elastomers can be adjusted over a wide range by changing the NCO/OH ratio, the free NCO percentage and the amount of chain extender.
PTMEG-based polyurethane elastomers can offer the following properties:
Superior resistance to hydrolytic breakdown
Flexibility and property retention at low temperatures
High flexibility and recovery
Low hysteresis with good mechanical and dynamic properties
Impact and abrasion resistance
Good processing properties
Elastomers prepared with PTMEG 1000 can be used in products such as industrial wheels and rollers, heavy-duty seals, shock absorbers, belts, wiper blades and engineering-grade polyurethane parts. PTMEG 1000 generally yields harder and mechanically more durable polyurethane structures compared to PTMEG 2000; therefore, it can be preferred in parts that require high load carrying and wear resistance.
The melting of PTMEG 1000, moisture control, prepolymer temperature, mold temperature, and post-curing conditions directly affect the final properties of the elastomer.
Elastomer systems based on PTMEG 1000 must therefore be optimized through laboratory and production trials according to target hardness and mechanical properties.
TPU, SPANDEX, ADHESIVE, AND COATING APPLICATIONS OF PTMEG 1000
PTMEG 1000 can be considered as a functional component in thermoplastic polyurethane (TPU), copolyester ether elastomer, polyether amide elastomer, spandex fiber, polyurethane adhesive, and coating applications with the appropriate quality grade.
The role of PTMEG 1000 in these applications is to form the soft segment, which gives the product flexibility, hydrolysis resistance, and low-temperature performance.
In TPU production, PTMEG 1000 can be used to produce TPU granules that are harder and more durable.
PTMEG-based TPUs can maintain their flexibility and mechanical integrity at low temperatures due to their linear chain structure and crystallization behavior under stress.
In copolyester ether elastomers (TPEE) and polyether amide elastomers, PTMEG 1000 is used as soft segment in combination with polyester or polyamide hard segments.
In these elastomers, PTMEG 1000 gives the material flexibility and low-temperature performance.
Spandex fibers are one of the most well-known uses of PTMEG; however, PTMEG grades with a molecular weight of 1800–2000 are generally considered standard for spandex fibers.
PTMEG 1000 can be considered in specific formulations in spandex applications, but the choice of grade should be based on the elasticity targeted by the fiber manufacturer.
In polyurethane adhesives, PTMEG 1000 can be evaluated in wood, metal, shoe and leather adhesives and flexible lamination adhesives.
In polyurethane coatings, PTMEG 1000 can be used in applications such as flexible polyurethane coatings, industrial flooring, and waterproof surface coatings.
The following points should be checked when purchasing PTMEG 1000 in these applications:
Hydroxyl number and molecular weight range
Water content
Acid number
Color
Viscosity and measurement temperature
Antioxidant content
Current technical specification
Certificate of Analysis (COA)
Safety data sheet (SDS)
Food contact and regulatory compliance documents where required
TPU, elastomer, fiber, adhesive, and coating applications each have different processing conditions and different quality expectations.
For this reason, it cannot be said that the PTMEG 1000 product that is suitable for one application is automatically suitable for other applications.
IS PTMEG 1000 USED IN COSMETIC, FOOD AND PHARMACEUTICAL APPLICATIONS?
PTMEG 1000 is not a substance used directly as an ingredient in cosmetic products, foods, or pharmaceuticals.
The primary use of PTMEG 1000 is in the production of polyurethanes and elastomers, and there is no commonly used INCI name or food additive number for PTMEG 1000.
However, some polyurethane products made with PTMEG 1000 can be used in food contact materials or medical devices.
In such applications, the issue considered is not the PTMEG 1000 itself, but the compliance of the final material produced with PTMEG 1000 with the relevant legislation.
In the United States, PTMEG is listed under FDA sections 21 CFR 175.105 (adhesives), 177.1590 (polyester elastomers), 177.1680 (polyurethane resins), and 177.2600 (rubber articles intended for repeated use).
It is stated in the manufacturer's documentation that some PTMEG grades comply with FDA requirements for indirect food contact.
In the European Union, some suppliers state that PTMEG grades comply with Regulation 10/2011/EU on plastic materials in contact with food.
Within the scope of this regulation, a specific migration limit of 0.6 mg/kg is applied for tetrahydrofuran, the monomer of PTMEG.
PTMEG-based polyurethanes can also be considered in specialized applications such as protective films, interlayers, and medical devices.
If PTMEG 1000 is to be used in medical device and food contact applications, documents showing the compliance of the product with the relevant legislation must be requested separately from the supplier and the conformity of the final material must be tested.
It should not be assumed that PTMEG 1000 grades for industrial purposes are suitable for food contact or medical applications based solely on the product name.
The current food contact, medical device and chemical legislation of the target market should also be checked.
INDUSTRIAL APPLICATIONS OF PTMEG 1000
PTMEG 1000 is an important raw material used in the production of numerous industrial polyurethane parts, thanks to its hydrolysis resistance, low-temperature flexibility, wear resistance, and good dynamic properties.
PTMEG 1000-based polyurethanes can be preferred especially in parts operating in harsh conditions such as mechanical strain, wear, moisture and low temperatures.
The following functions may be prominent in industrial PTMEG 1000 applications:
Abrasion and tear resistance
Hydrolysis resistance
Low-temperature flexibility
High rebound and shock absorption
Low hysteresis
Vibration and shock control
In the transportation industry, PTMEG-based polyurethanes can be used in products such as wheels, heavy-duty wheels, tires for forklifts, lawn mowers and off-road vehicles.
In the automotive industry, PTMEG 1000-based elastomers can be used in gaskets, shock absorber components and engineering-grade polyurethane parts.
In industrial equipment, PTMEG-based polyurethanes can be used in parts such as belts, wiper blades, chute and tank linings, pipes, hoses and pump components.
In mining, energy and oilfield applications, PTMEG-based polyurethanes can be evaluated in components subject to wear such as gaskets, valves, hydrocyclones, screens and flotation parts.
In consumer and sports products, PTMEG-based polyurethanes can be used in products such as sports shoes, boots and sports equipment.
In the footwear and leather industry, PTMEG 1000 can be used in artificial leather, artificial suede and shoe adhesives.
The following issues should be evaluated when using PTMEG 1000 in industrial systems:
Product quality and hydroxyl number
Water content and moisture control
Isocyanate type and NCO/OH ratio
Choosing a chain extender or curative
Target hardness and mechanical properties
Process, mold and final curing temperatures
Melting and storage conditions
Oil, solvent and chemical exposure in the environment in which the part will operate
WHAT PROBLEMS CAN PTMEG 1000 HELP SOLVE?
PTMEG 1000 can help solve various problems associated with hydrolysis-induced degradation, low-temperature hardening, insufficient rebound, high heat build-up and wear in polyurethane and elastomer applications.
However, the effect of PTMEG 1000 depends on the product quality, formulation and process conditions used.
Hydrolysis-induced degradation in humid and hot environments
Polyester-based polyurethanes containing ester bonds may lose their mechanical properties over time due to hydrolysis in humid and hot environments.
PTMEG-based polyurethanes can better maintain their properties in such conditions thanks to the resistance of ether bonds to hydrolysis.
For example, it has been reported that a PTMEG 2000/MDI/BDO elastomer kept for 72 hours at 105 °C and 100 percent relative humidity retains 67 percent of its breaking strength, while the two compared adipate polyester elastomers retain 20 percent and 12 percent. This data belongs to a PTMEG 2000 based system; the performance of PTMEG 1000 based systems should be tested separately according to the formulation.
Low-temperature hardening and loss of flexibility
Polyurethanes produced with some types of polyol may harden at low temperatures and lose their flexibility.
The soft segments of PTMEG 1000 with a low glass transition temperature can help the polyurethane maintain its flexibility at low temperatures.
Heat build-up and low rebound under repeated loading
High hysteresis in parts subjected to repetitive loads, such as wheels, rollers, and shock absorbers, can lead to heat buildup and premature part failure.
The low hysteresis and high rebound properties of PTMEG 1000-based elastomers can help mitigate these issues.
Part failures due to abrasion and tearing
Components such as chute liners, screens, pump parts, and wheels that come into contact with abrasive materials can wear out in a short time.
PTMEG 1000-based polyurethanes can help extend the lifespan of such parts thanks to their abrasion and tear resistance.
Microorganism and fungal effect
Some materials used in humid environments may deteriorate due to the effects of fungi and microorganisms.
The fungal resistance of PTMEG-based resins can be advantageous in products used in such environments.
However, PTMEG-based polyurethanes may have limited resistance to nonpolar hydrocarbon solvents and mineral oils; the choice of polyol in such environments should be evaluated separately.
It should not be assumed that every PTMEG 1000 product will exhibit the same process and performance behavior; the formulation should be validated by laboratory and field trials.
THINGS TO CONSIDER WHEN USING PTMEG 1000
One of the most common mistakes in using PTMEG 1000 is to use PTMEG 1000 products from different manufacturers interchangeably with the same weight without checking the hydroxyl number.
However, PTMEG 1000 products may differ in hydroxyl number and this difference changes the need for isocyanate and the NCO/OH ratio.
The following issues should be considered when using PTMEG 1000:
Formulation calculations should be made based on the hydroxyl number specified in the COA of the batch used.
Since PTMEG 1000 is hygroscopic, contact with moisture should be limited.
The water content should be checked prior to reaction with isocyanates.
Since PTMEG 1000 may degrade on contact with air and oxygen, open packages should be blanketed with dry nitrogen.
When melting solidified PTMEG 1000, the heating temperature should not exceed 60 °C.
Local overheating should be avoided during melting.
Drums should be rolled or the product homogenized during melting to avoid the separation of different molecular weight fractions.
For liquid storage, it is recommended to keep the temperature below 50 °C.
PTMEG 1000 should be kept away from acids and oxidizing agents.
The risk of spontaneous ignition at high temperatures should be considered.
Ignition sources such as heat, flame, sparks, and electrostatic discharge should be avoided.
The safety requirements of the isocyanates and curatives used together should be evaluated separately.
The limited resistance of PTMEG-based polyurethanes to nonpolar solvents and mineral oils should be evaluated based on the environment of use.
Dosage and formulation should be determined by laboratory and manufacturing trials.
Manufacturer TDS and SDS documents should be examined.
Batch analysis results should be verified through COA.
PTMEG 1000 is not usually classified as a hazardous substance according to GHS criteria in manufacturer safety data sheets; however, mild irritation to the skin or eyes may occur, depending on the individual.
Safety glasses, suitable protective gloves and work clothing should be worn when working with PTMEG 1000, and adequate ventilation and local exhaust ventilation should be ensured when the product is processed by heating.
Isocyanates such as TDI, MDI, HMDI and curatives such as MOCA, MDA used with PTMEG 1000 may carry very different health and safety risks than PTMEG 1000.
Therefore, when working with these components, the protective equipment and operating conditions in the current SDS document of each should be taken as a basis.
INITIAL FORMULATION APPROACHES FOR PTMEG 1000
The following examples are initial approaches to illustrate how PTMEG 1000 can be evaluated in the polyurethane elastomer development process.
These are not verified commercial recipes, manufacturing instructions, or final formulas compliant with regulations.
The ratios given are the initial laboratory trial levels compiled from the values published in elastomer studies with PTMEG 1000.
The hydroxyl number, water content and other raw materials of the PTMEG 1000 to be used can significantly change the results; laboratory trial, performance tests, occupational safety and relevant legislation checks should be carried out in each application.
EXAMPLE 1: CAST ELASTOMER WITH PTMEG 1000/TDI PREPOLYMER AND MOCA
Objective: To prepare a cast polyurethane elastomer with high hardness and high abrasion and tear resistance with PTMEG 1000-based TDI prepolymer and MOCA curing agent.
Starting components:
PTMEG 1000: polyol component of the prepolymer
TDI (2,4-TDI or 80/20 2,4/2,6-TDI): With an NCO/OH ratio of approximately 2/1
Target prepolymer free NCO content: approx. 6.2%
MOCA: approx. 95 percent stoichiometry, approx. 18.7 g per 100 g of prepolymer
Target hardness: about 96 Shore A
Application approach:
PTMEG 1000 is melted and homogenized to a temperature not exceeding 60 °C; the water content is checked.
The prepolymer is prepared by reacting PTMEG 1000 with TDI with an NCO/OH ratio of approximately 2/1.
The percentage of free NCO of the prepolymer is measured and compared to the target value.
The prepolymer is brought to about 70 °C, MOCA is prepared by melting at about 110 °C.
The calculated amount of MOCA is added to the prepolymer and mixed without forming bubbles.
The mixture is poured into the mold heated to about 110 °C.
After the parts are removed from the mold, they undergo final curing at approximately 110 °C for 16 hours.
Hardness, tensile strength, elongation, tear resistance, compression set and abrasion tests are performed.
When working with MOCA and TDI, personal protective equipment specified in the SDS of these substances should be used, local exhaust ventilation should be provided, and exposure should be minimized.
EXAMPLE 2: HARDNESS SCREENING WITH PTMEG 1000 / MDI PREPOLYMER AND 1,4-BUTANEDIOL
Objective: To obtain elastomers of different hardness by changing the NCO/OH ratio and the amount of 1,4-butanediol (BDO) in PTMEG 1000-based MDI prepolymers and to evaluate hydrolysis resistance and low temperature flexibility.
Starting approach:
85 Shore A target: NCO/OH approx. 2/1, free NCO approx. 5.3%, approx. 5.4 g BDO per 100 g prepolymer
90 Shore A target: NCO/OH approx. 2.4/1, free NCO approx. 7.3 percent, approx. 7.3 g BDO per 100 g prepolymer
95 Shore A target: NCO/OH approx. 3/1, free NCO approx. 9.4 percent, approx. 9.5 g BDO per 100 g prepolymer
BDO: about 95 percent stoichiometry
Reactant temperature approx. 80°C, mould temperature approx. 120°C
Application approach:
PTMEG 1000 is melted, the water content is checked, and the prepolymer is prepared by reacting with MDI at the target NCO/OH ratio.
The percentage of free NCO of each prepolymer is measured and the amount of BDO is recalculated based on the measured value.
The prepolymer and BDO are mixed by high-shear mixing at about 80 °C.
Since the pot life can be short, the mixture is quickly poured into the mold at about 120 °C.
The parts are subjected to 16 hours of final curing at approximately 110 °C.
Hardness, modulus, elongation and low temperature flexibility are measured; for hydrolysis resistance, samples are kept in a hot and humid environment and the change in mechanical properties is compared.
When working with MDI, personal protective equipment specified in the SDS of MDI should be used and adequate ventilation should be provided.
EXAMPLE 3: UV-RESISTANT ELASTOMER WITH PTMEG 1000 / HMDI PREPOLYMER AND MDA
Objective: To prepare an elastomer with high UV resistance and hydrolysis stability with PTMEG 1000-based aliphatic HMDI prepolymer.
Starting approach:
PTMEG 1000: polyol component of the prepolymer
HMDI: With an NCO/OH ratio of approximately 2/1
Target prepolymer free NCO content: approx. 5.5%
MDA: approx. 95% stoichiometry, approx. 12.3 g per 100 g of prepolymer
Mixing temperature approx. 100°C, mould temperature approx. 110°C
Target hardness: about 50 Shore D
Application approach:
PTMEG 1000 is melted, the water content is checked and the prepolymer is prepared by reacting with the HMDI.
The percentage of free NCO of the prepolymer is measured and the amount of MDA is calculated accordingly.
The prepolymer and MDA are mixed at about 100 °C; the mixture is quickly poured into the mold because the pot life can be a few minutes.
The parts are formed in the mold at about 110 °C and then subjected to final curing at about 110 °C for 16 hours.
Hardness, tensile strength, tear resistance, rebound and compression set are measured.
For UV resistance, samples are subjected to accelerated aging tests to compare color and mechanical property changes.
When working with HMDI and MDA, the personal protective equipment specified in the SDS of these substances should be used, local exhaust ventilation should be provided, and exposure should be minimized.
SIMILAR PRODUCTS AND ALTERNATIVES TO PTMEG 1000
The alternative to PTMEG 1000 is not just about choosing another polyether polyol.
When determining the alternative, the targeted hardness, hydrolysis resistance, low temperature flexibility, mechanical properties, oil and solvent resistance, UV resistance, processability and cost should be evaluated together.
PTMEG 1000 AND OTHER PTMEG GRADES
PTMEG 650 and lower molecular weight grades are liquid at room temperature, have a lower viscosity, and are easier to process.
Higher molecular weight grades such as PTMEG 1400, PTMEG 1800, PTMEG 2000 and PTMEG 3000 generally provide higher elasticity, flexibility, rebound and low temperature flexibility.
PTMEG 1000 is a grade in this series that offers a balance between processability and hardness and mechanical strength.
When switching between grades, the amounts of isocyanate and chain extender must be recalculated due to the difference in hydroxyl number.
PTMEG 1000 AND POLYPROPYLENE GLYCOL (PPG)
Polypropylene glycol is also a polyether polyol, and its hydrolysis resistance and low temperature flexibility are good.
However, the mechanical properties of PPG-based polyurethanes are generally weaker than those of PTMEG-based systems, and PPG is more prone to thermo-oxidative degradation.
PTMEG 1000 AND POLYESTER (ADIPATE) POLYOLS
Polyester polyols provide high tensile strength, cut and tear resistance, abrasion and bending fatigue resistance, and very good resistance to oil, grease and nonpolar solvents.
In contrast, polyester-based polyurethanes have poor hydrolysis resistance and can harden at low temperature due to higher glass transition temperatures.
For this reason, polyester polyols can be preferred in applications where oil and solvent resistance is a priority, and PTMEG 1000 can be preferred in applications where moisture and low temperature resistance are a priority.
PTMEG 1000 AND POLYCAPROLACTONE (PCL) POLYOLS
Compared to adipate polyesters, polycaprolactone polyols offer better hydrolysis resistance, higher weathering and UV resistance, and good high-temperature oxidative stability.
PCL polyols can also exhibit higher chemical resistance to oils, fuels, and solvents than adipate polyesters.
PTMEG 1000 AND POLYCARBONATE DIOLS
Polycarbonate diols provide excellent hydrolysis resistance together with low water absorption, good weathering and UV resistance, and excellent high-temperature stability.
Polycarbonate diol-based polyurethanes can offer high mechanical properties, impact and abrasion resistance, but may have poor hydrolysis resistance in basic environments.
In alternative selection, the targeted performance, usage environment, regulatory requirements and cost should be determined by comparative laboratory and field tests.
QUALITY CONTROL AND PURCHASING CRITERIA FOR PTMEG 1000
When purchasing PTMEG 1000, it is not enough to make a decision based solely on the product name and price.
PTMEG 1000 products from different manufacturers may differ in parameters such as hydroxyl number, water content, color, and viscosity.
Recommended information to review before purchasing:
Product name and manufacturer
Molecular weight grade
CAS number
Hydroxyl number
Molecular weight range
Water content
Acid number
Color (APHA)
Carbonyl ratio
Viscosity and measurement temperature
Density
Type and content of antioxidants
Metal impurities such as iron when necessary
Technical Data Sheet (TDS)
Safety data sheet (SDS)
Certificate of Analysis (COA)
Production and batch information
Origin information
Packaging type and net quantity
Storage conditions
Shelf life or retest information
Food contact and regulatory compliance documents when necessary
The COA shows the analysis results of a specific batch of PTMEG 1000; the TDS describes the general technical specifications and recommended uses of the product.
The SDS contains information on safe use, transport, storage and emergencies; these documents are not interchangeable and should be considered together.
When purchasing PTMEG 1000, the supplier should be specifically asked about the hydroxyl number, water content, acid number and color values.
This is because the hydroxyl number directly determines the formulation calculations, the water content directly affects the isocyanate reaction, and the acid number and color directly reflect the purity and storage history of the product.
Viscosity values cannot be directly compared with each other when measured at different temperatures; therefore, the measuring temperature must be checked.
Products that have been stored in improper conditions or kept for a long time should be retested for hydroxyl number, water content, acid number and color before use.
STORAGE AND HANDLING OF PTMEG 1000
PTMEG 1000 should be stored in a cool, dry, and well-ventilated area away from heat, sparks, and direct sunlight in tightly sealed airtight packaging.
PTMEG 1000 is a hygroscopic product and can degrade on contact with air or oxygen; therefore, it is recommended to blanket packages with dry nitrogen before closing.
Because PTMEG 1000 can solidify at room temperature, it may need to be liquefied by heating before being discharged from the drum or tank.
When melting solidified PTMEG 1000, the heating temperature should not exceed 60 °C, localized overheating should be avoided, and the drums should be rolled during melting to prevent the separation of different molecular weight fractions.
If PTMEG 1000 needs to be stored in liquid form, it is recommended to keep the temperature below 50 °C.
PTMEG 1000 should be stored separately from acids and oxidizing agents.
During transfer and use, ignition sources should be avoided and electrostatic discharge should be prevented.
Packaging should be tightly closed, clearly labeled, and kept in chemically resistant secondary containment where necessary.
After opening the packaging, it is important to protect the PTMEG 1000 from moisture and air; the unused product should not be returned to the packaging and the packaging should be blanketed with nitrogen again before sealing.
To maintain consistent quality, stocks should be used on a "first-in, first-out" (FIFO) principle.
PTMEG products are usually transported in 200 kg steel drums and heated ISO tanks.
In the manufacturer's safety data sheets, PTMEG is not classified as dangerous goods in road, sea and air transport (DOT, IMDG, IATA).
In the event of a spill, sources of ignition should be removed, the product should be collected with sand or a non-combustible absorbent material and placed in suitable and closed containers for disposal.
The product should be prevented from reaching sewers, waterways, or confined spaces.
PTMEG 1000 SAFETY INFORMATION
Safe use of PTMEG 1000 depends on the up-to-date SDS document of the supplied product and the implementation of appropriate occupational safety measures.
In manufacturer safety data sheets, PTMEG is not classified as a hazardous substance according to GHS criteria and does not require a hazard warning label.
However, depending on the individual, PTMEG 1000 may cause mild irritation to the skin or eyes.
As different hazard classifications may be found in some supplier documents, the current hazard and precautionary statements for PTMEG 1000 should be checked in the supplier's SDS document.
NFPA values for PTMEG are given as health 0, fire 1 and reactivity 0 in manufacturer safety data sheets.
There is no defined occupational exposure limit for PTMEG in local regulations, ACGIH, or biological exposure limits.
In the manufacturer's documentation, the oral LD50 value in the rat is reported as 11,340 mg/kg and the dermal LD50 value in the rabbit as 8,370 mg/kg for the PTMEG 650 grade.
These values refer to PTMEG 650; current toxicological data for PTMEG 1000 should be checked in the supplier's SDS document.
Skin and eye contact should be avoided when working with PTMEG 1000; safety glasses, suitable protective gloves and work clothing should be used.
Under normal conditions, respiratory protection is generally not required; however, when the product is processed by heating, local exhaust ventilation should be provided to control vapors and mists, and appropriate respiratory protection should be used in case of uncontrolled release.
In case of eye contact, the eyes should be washed with plenty of water for at least 15 minutes and a doctor should be consulted.
In case of skin contact, the area should be washed with soap and plenty of water, and contaminated clothing and shoes should be cleaned before reuse.
In case of inhalation, the person should be taken to fresh air, artificial respiration should be performed when necessary, and a doctor should be consulted.
If swallowed, the mouth should be rinsed with water and a doctor should be consulted; nothing should be given orally to an unconscious person.
In the event of a fire, water spray, alcohol-resistant foam, dry chemical powder, or carbon dioxide can be used.
Carbon oxides may form when PTMEG 1000 decomposes with heat; fire brigade personnel should use self-contained breathing apparatus when necessary.
Although the fire risk of PTMEG 1000 is low, the risk of self-ignition at high temperatures and the ignition of dust/air mixtures should be taken into account.
Heat, flame, sparks, electrostatic discharge, and other ignition sources should be avoided.
There are insufficient data in the manufacturer's documentation on ecotoxicity, persistence, and biodegradability for PTMEG.
The product and waste containing PTMEG 1000 should be prevented from reaching sewers, soil or surface waters, and waste disposal should be carried out in accordance with local legislation and the methods specified in the SDS.
According to manufacturer documentation, PTMEG is on the US TSCA inventory and the Canadian DSL list.
Some safety data sheets state that PTMEG is not included in the EU SVHC list, permit list and restriction list; the current legislative situation should be followed from official sources.
It should not be assumed that the safety information of different manufacturers or different grades is the same.
Up-to-date SDS and manufacturer's technical document should be taken as basis.
WHAT TO CONSIDER WHEN BUYING PTMEG 1000?
The first step in the supply of PTMEG 1000 is to clarify the purpose for which the product will be used and in which system.
The quality criteria sought for cast elastomer, TPU, prepolymer, spandex, adhesive, or coating applications may not be the same.
For this reason, instead of writing only "PTMEG 1000" in the purchase request, specifying the area of use, isocyanate system used, desired hydroxyl number range and quality expectations provides a more accurate product evaluation.
If food contact or medical applications are involved, the necessary regulatory compliance documents for these areas should be requested separately.
The following information should be clarified before purchasing:
Sector of use and end application
Isocyanate and curing system used
Desired hydroxyl number and molecular weight range
Water content, acid number, and color limits
Viscosity expectation and measurement temperature
Antioxidant requirement
Mode of delivery (drum or heated tank)
Storage and melting facilities
Manufacturer and origin information requirement
Desired packaging type and quantity
TDS, SDS and COA needs
Food contact and other regulatory compliance documents
If substitution is to be made with the existing product, technical specifications of the existing product
The price of PTMEG 1000 may vary according to quality, origin, cost of tetrahydrofuran used as raw material, facility capacities, regional demand, order quantity, packaging, logistics and current market conditions.
Therefore, the current PTMEG 1000 price should be evaluated on the offer together with the product specification and delivery conditions.
PTMEG 1000 SUPPLY FROM ATAMAN KIMYA
PTMEG 1000 is a polyether diol that is considered as a soft segment component in different applications such as cast polyurethane elastomers, prepolymers, TPU, copolyester and polyether amide elastomers, spandex fibers, adhesives and coatings.
It is important for manufacturers planning to purchase PTMEG 1000 to clarify the quality, technical specifications and necessary documents suitable for the application area before ordering.
Companies wishing to obtain information about the supply of PTMEG 1000 from Ataman Kimya can request information about product suitability, current supply status, packaging options and price offers by sharing their usage areas and technical needs.
The current stock status, origin, quality characteristics, packaging and specifications of PTMEG 1000 should be confirmed from Ataman Kimya before ordering.
Sharing the following information in the request for quotation makes it easier to evaluate the right PTMEG 1000 product:
Sector of use and end application
Isocyanate and curing system used
Requested hydroxyl number range
Water content, acid number and color expectation
Knowledge of the formulation or process used
Estimated order quantity
Type of packaging requested
Requested technical documents
TDS or COA information of the current product, if applicable
FREQUENTLY ASKED QUESTIONS ABOUT PTMEG 1000
What is PTMEG 1000?
PTMEG 1000 is a linear polyether diol with an average molecular weight of about 1000 g/mol, produced by polymerization of tetrahydrofuran, and PTMEG 1000 is used as a polyol in high-performance polyurethane systems, primarily polyurethane elastomers.
What is the chemical name of PTMEG 1000?
The chemical name of PTMEG 1000 is polytetramethylene ether glycol; PTMEG 1000 is also known by the names polytetramethylene glycol, poly(tetramethylene oxide), and polytetrahydrofuran.
What is the CAS number of PTMEG 1000?
The CAS number of PTMEG 1000 is 25190-06-1, and this number is also used for other PTMEG grades.
What is the EC/EINECS number of PTMEG 1000?
Because PTMEG 1000 is a polymer, there may not be a commonly listed EC number; this information should be checked in the supplier's documentation.
What is the chemical formula of PTMEG 1000?
The general formula of PTMEG 1000 is HO–[CH2CH2CH2CH2O]n–H; because PTMEG 1000 is a polymer, it is not defined by a single fixed molecule formula.
Is PTMEG 1000 the same as tetrahydrofuran?
No; tetrahydrofuran is a volatile solvent and monomer, while PTMEG 1000 is a non-volatile polymer produced from tetrahydrofuran.
How is PTMEG 1000 manufactured?
PTMEG 1000 is produced by acid-catalyzed ring-opening polymerization of tetrahydrofuran.
What is the physical appearance of PTMEG 1000?
PTMEG 1000 is a white, waxy solid at room temperature and turns into a clear, colorless liquid when heated.
What is the hydroxyl number of PTMEG 1000?
The hydroxyl number of PTMEG 1000 is indicated in the range of approximately 106.9–118.1 mg KOH/g, depending on the manufacturer; the exact value should be checked from the COA document of the batch.
What is the melting point of PTMEG 1000?
PTMEG 1000 does not have a sharp melting point; it begins to soften from about 24 °C and turns into a low viscosity liquid around 38 °C.
What is the viscosity of PTMEG 1000?
The viscosity of PTMEG 1000 at 40 °C is specified in the range of approximately 240–360 mPa·s, depending on the manufacturer.
What is PTMEG 1000 used for?
PTMEG 1000 is used to create soft segment in polyurethane, copolyester, and polyether amide elastomers, giving the material flexibility, hydrolysis resistance, and low-temperature performance.
In which sectors is PTMEG 1000 used?
PTMEG 1000 can be used in the automotive, machinery and industrial equipment, mining and oilfield, TPU production, adhesive and coating, footwear and leather, textile and sports equipment sectors.
What is the difference between PTMEG 1000 and PTMEG 2000?
PTMEG 1000 generally yields more rigid and mechanically resistant polyurethane structures, while PTMEG 2000 provides higher elasticity, flexibility, and low-temperature flexibility.
Is PTMEG 1000 used in the production of spandex?
PTMEG 1000 can be considered in spandex applications; however, PTMEG grades with a molecular weight of 1800–2000 are generally considered standard for spandex fibers.
Why are PTMEG-based polyurethanes hydrolysis-resistant?
PTMEG 1000 has ether bonds in its main chain, which do not break down easily with water; therefore, PTMEG-based polyurethanes are more resistant to hydrolysis compared to polyester-based systems containing ester bonds.
What are the weaknesses of PTMEG 1000?
PTMEG-based polyurethanes may have limited resistance to nonpolar hydrocarbon solvents and mineral oils; polyester polyols may perform better in this regard.
Is PTMEG 1000 used in cosmetics or food?
PTMEG 1000 is not used as a direct ingredient in cosmetics or food; however, some materials produced with PTMEG can be used in food contact applications, provided that they comply with the relevant legislation.
Is PTMEG 1000 a hazardous substance?
In the manufacturer's safety data sheets, PTMEG is not classified as a dangerous substance according to GHS criteria; however, skin and eye contact should be avoided and the current SDS should be taken as a basis.
Is PTMEG 1000 classified as dangerous goods for transport?
In the manufacturer's safety data sheets, PTMEG is not classified as dangerous goods in road, sea and air transport.
How should PTMEG 1000 be stored?
PTMEG 1000 should be stored in a cool, dry and well-ventilated area, in tightly closed packaging, preferably under dry nitrogen, away from acids and oxidizers.
How to melt solidified PTMEG 1000?
The solidified PTMEG 1000 should be melted with a heating temperature not exceeding 60 °C avoiding localized overheating, and the product should be homogenized by rolling the drums during melting.
What isocyanates is PTMEG 1000 used with?
PTMEG 1000 can be used to create prepolymers with diisocyanates such as TDI, MDI, and HMDI; substances such as MOCA, 1,4-butanediol, HQEE, or MDA can be evaluated as chain extenders or curing agents.
Is there an alternative to PTMEG 1000?
Other PTMEG grades, polypropylene glycol, polyester polyols, polycaprolactone polyols, and polycarbonate diols may be considered as alternatives in certain applications; the choice should be based on the targeted performance.
What does the price of PTMEG 1000 depend on?
The price of PTMEG 1000 may vary according to quality, origin, raw material costs, facility capacities, regional demand, packaging, order quantity, logistics and market conditions.
What documents should be requested when purchasing PTMEG 1000?
TDS, SDS and COA are basic documents; in addition to these, origin information and, when necessary, food contact and regulatory compliance documents may be requested.
PTMEG 1000 – TECHNICAL SUMMARY
PTMEG 1000, Polytetramethylene Ether Glycol 1000 is a linear polyether diol with primary hydroxyl groups at the ends, with an average molecular weight of about 1000 g/mol, produced by the acid-catalyzed polymerization of tetrahydrofuran.
PTMEG 1000 can be searched for under different names such as PTMEG, PTMG, PTHF, polytetramethylene glycol, poly(tetramethylene oxide) and polytetrahydrofuran, and is identified by CAS No 25190-06-1.
PTMEG 1000 is one of the most widely used grades in the PTMEG series, offering a balance between processability and hardness and mechanical strength.
The hydroxyl number, water content, acid number, color, and viscosity of PTMEG 1000 are key parameters that directly impact product performance and formulation calculations.
PTMEG 1000 is a white, waxy solid at room temperature, softens from approx. 24 °C, is hygroscopic and needs to be protected against air and oxygen.
Therefore, PTMEG 1000 should be stored under dry nitrogen, melted without exceeding 60 °C, and homogenized during melting.
PTMEG 1000 is mainly used in cast polyurethane elastomers, prepolymers, TPU, copolyester and polyether amide elastomers, adhesives and coatings.
PTMEG 1000 based polyurethanes provide significant advantages for parts operating in harsh conditions thanks to its hydrolysis resistance, low temperature flexibility, high rebound, low hysteresis and wear resistance.
Proper occupational safety measures must be taken during the processing of PTMEG 1000, which is generally not classified as a hazardous substance in manufacturer safety documents, and up-to-date SDS must be taken as a basis; the safety requirements of isocyanates and curatives used with PTMEG 1000 must be evaluated separately.
Companies planning to procure PTMEG 1000 from Ataman Kimya are recommended to confirm current product, stock, origin, packaging and offer information by sharing their usage area, isocyanate system used, range of hydroxyl number requested, quality expectations, quantity and technical document needs.
