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Polymeric diphenylmethane diisocyanate (PMDI) is used in polyurethane foams in insulation panels for buildings, refrigerators, and freezers.
Polymeric diphenylmethane diisocyanate (PMDI) is also used in coatings, sealants and adhesives for construction, automotive, and other industries.
Polymeric diphenylmethane diisocyanate (PMDI) is used to make rigid and flexible foam, foundry resin sand binders, and heat insulating material.
CAS Number: 9016-87-9
EC Number: 618-498-9
Molecular Formula: Varies due to its polymeric nature.
Molecular Weight: Approximately 200-400 g/mol, depending on the degree of polymerization.
CH₂(C₆H₄NCO)₂
SYNONYMS:
Polymeric MDI, Polymethylene polyphenyl isocyanate, Polymeric methylene diphenyl diisocyanate, Polymeric Methylene bis(phenyl isocyanate), Polymeric 4,4'-diphenylmethane diisocyanate, PMDI, Isocyanic acid, polymethylenepolyphenylene ester, Polyphenylpolymethylene polyisocyanate, PAPI, MDI oligomer, PMDI, polymeric MDI, polymeric isocyanate, polymeric 4,4’-methylenediphenyl diisocyanate, polymethylenepolyphenol isocyanate, polyphenyl isocyanate, PAPI
Polymeric diphenylmethane diisocyanate (PMDI) is a mixture containing a certain proportion of pure mdi and polyphenyl polymethylene polyisocyanate, which is the main raw material for the production of polyurethane foam insulation materials, floor materials, various adhesives and other polyurethane products.
Polymeric diphenylmethane diisocyanate (PMDI), polymethylene polyphenylisocyanates, also p-MDI or PMDI, is generally used in manufacturing hard and semi-hard polyurethane foam.
Polymeric diphenylmethane diisocyanate (PMDI) is liquefied in normal temperature and easily handled and stored down to -20℃.
Polymeric diphenylmethane diisocyanate (PMDI) is a complex mixture primarily composed of monomeric 4,4'-methylenediphenyl diisocyanate (MDI) and its oligomers.
Polymeric diphenylmethane diisocyanate (PMDI), the primary technical/commercial form of MDI, is actually a mixture that contains 25-80% monomeric 4,4'-MDI as well as oligomers
containing 3-6 rings and other minor isomers, such as the 2,2'-isomer.
The exact composition of Polymeric diphenylmethane diisocyanate (PMDI) varies with the manufacturer.
Polymeric diphenylmethane diisocyanate (PMDI) is a type of methylene diphenyl diisocyanate (MDI), a key ingredient in the production of polyurethane foams.
While MDI itself is a diisocyanate monomer, Polymeric diphenylmethane diisocyanate (PMDI) is a mixture of diisocyanates with varying degrees of polymerization.
Polymeric diphenylmethane diisocyanate (PMDI), polymethylene polyphenylisocyanates, also p-MDI or PMDI, is generally used in manufacturing hard and semi-hard polyurethane foam.
Polymeric diphenylmethane diisocyanate (PMDI) is liquefied in normal temperature and easily handled and stored down to -20℃.
Polymeric diphenylmethane diisocyanate (PMDI) is a brown mixture of monomeric (2-ring) and polyaromatic 3-ring and higher species) Methylene Diphenyldiisocyanates, which is liquid at room temperature.
A higher Polymeric diphenylmethane diisocyanate (PMDI) viscosity indicates a lower content of monomeric and a higher content of polyaromatic components; that is, as pMDI viscosity increases, so does isocyanate functionality.
Polymeric diphenylmethane diisocyanate (PMDI) with different functionality and reactivity.
USES and APPLICATIONS of POLYMERIC DIPHENYLMETHANE DIISOCYANATE (PMDI):
Polymeric diphenylmethane diisocyanate (PMDI) offers a balanced viscosity and tailored acidity range making it suitable for a wide range of foamed and non-foamed rigid, viscoelastic and flexible applications while providing excellent process conditions.
The main application for Polymeric diphenylmethane diisocyanate (PMDI), in the Polyurethanes industry, are: Construction Panels, Spray Heat Insulation, Refrigerators and Car Interiors.
Polymeric diphenylmethane diisocyanate (PMDI) is predominantly used in the production of rigid polyurethane foams, which serve as insulation materials in construction and refrigeration.
Polymeric diphenylmethane diisocyanate (PMDI)'s also utilized in the manufacturing of adhesives, sealants, and elastomers.
Additionally, Polymeric diphenylmethane diisocyanate (PMDI) plays a role in producing binders for composite wood products and foundry core binders.
Polymeric diphenylmethane diisocyanate (PMDI) is used in polyurethane foams in insulation panels for buildings, refrigerators, and freezers.
Polymeric diphenylmethane diisocyanate (PMDI) is also used in coatings, sealants and adhesives for construction, automotive, and other industries.
Polymeric diphenylmethane diisocyanate (PMDI) is used to make rigid and flexible foam, foundry resin sand binders, and heat insulating material.
The main application for Polymeric diphenylmethane diisocyanate (PMDI), in the Polyurethanes industry, is: Construction Panels, Spray Heat Insulation, Refrigerators and Car Interiors.
Polymeric diphenylmethane diisocyanate (PMDI) is mainly used for the production of rigid foam, pMDI grades are also used as a binder in the wood-working industry.
In combination with mMDI grades, Polymeric diphenylmethane diisocyanate (PMDI) is also used to produce various types of flexible foam and CASE applications.
BENEFITS AND CHARACTERISTICS OF POLYMERIC DIPHENYLMETHANE DIISOCYANATE (PMDI):
*Versatility:
Polymeric diphenylmethane diisocyanate (PMDI) can be formulated to produce foams with varying densities and properties, catering to diverse applications.
*Insulation Efficiency:
Rigid polyurethane foams derived from Polymeric diphenylmethane diisocyanate (PMDI) offer excellent thermal insulation, enhancing energy efficiency in buildings and appliances.
*Adhesion Properties:
Polymeric diphenylmethane diisocyanate (PMDI)-based adhesives exhibit strong bonding capabilities, making them suitable for various substrates.
*Chemical Stability:
Polymeric diphenylmethane diisocyanate (PMDI) provides durability and resistance to various chemicals, extending the lifespan of end products.
It's essential to handle Polymeric diphenylmethane diisocyanate (PMDI) with care, as exposure can lead to respiratory and skin irritation.
Appropriate safety measures, including the use of personal protective equipment, are recommended during Polymeric diphenylmethane diisocyanate (PMDI)'s handling and application
PHYSICAL and CHEMICAL PROPERTIES of POLYMERIC DIPHENYLMETHANE DIISOCYANATE (PMDI):
EC Number: 618-498-9
CAS Number: 9016-87-9
Appearance: Dark-brown liquid with a weak odor.
Molecular Formula: Varies due to its polymeric nature.
Molecular Weight: Approximately 200-400 g/mol, depending on the degree of polymerization.
Density: Approximately 1.2 g/cm³ at 25°C.
Viscosity: Varies with composition; typically between 150-250 mPa·s at 25°C.
Reactivity: Reacts slowly with water, releasing carbon dioxide and forming a solid urea.
Appearance: Dark-brown liquid
Density, g/cm3: 1.2
Flash Point, °C: 200
Melting point, °C: 38
Molecular weight, g/mol: 149.15
Odor: Weak odor
Purity, %: 99
Refractive index, n20/D: 1.634
Boiling point: 392°F
Molecular weight: 400 (approx)
Freezing point/melting point: 200°C
Vapor pressure:
Flash point: 200°C
Vapor density:
Specific gravity: 1.2
Colour: dark brown
Viscosity at 25 ºC(mPa.s): 170-250
Density at 25 ºC(g/cm³): 1.23
Acidity as HCl(wt.%): <0.06
Flash point (ºC): >200
CAS No.: 9016-87-9
InChIKeys: JTEOXXUIKUHXLD-UHFFFAOYSA-N
Molecular Weight: 149.14668
Exact Mass: 250.074234
EC Number: 618-498-9
Color/Form: DARK-AMBER VISCOUS LIQUID
HScode: 3909301000
Categories: Inorganic Acid
PSA: 58.86000
XLogP3: 4.93
Appearance: Polymeric diphenylmethane diisocyanate is a dark-brown liquid with a weak odor.
Sinks in water. (USCG, 1999)
Density: 1.2 g/cm3 @ Temp: 20 °C
Melting Point: 200°C @760 mm Hg
Boiling Point: 392 °C5 mm Hg
Flash Point: >230 °F
Refractive Index: 1.588
Vapor Pressure: LESS THAN 1X10-4 MM HG @ 25 °C
Vapor Density: 8.6 (vs air)
Experimental Properties: ISOCYANATE EQUIVALENT 132-137 G/EQUIV;
HYDROLYZABLE CHLORIDE 0.28-0.5%;
ISOCYANATE CONTENT 30.5-32% MIN
ACIDITY AS HYDROCHLORIC ACID 0.2-0.3
Boiling point is 196 °C at 5 mm Hg;
melting point is 38 °C.
Soluble in acetone, benzene, kerosene, nitrobenzene /Methyl Diphenyl Diisocyanate/
Air and Water Reactions: Reacts with water slowly forming heavy scum and liberating carbon dioxide gas.
Reactive Group: Isocyanates and Isothiocyanates
Reactivity Alerts: Water-Reactive
FIRST AID MEASURES of POLYMERIC DIPHENYLMETHANE DIISOCYANATE (PMDI):
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation:
Fresh air.
*In case of skin contact:
Take off immediately all contaminated clothing.
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact:
Rinse out with plenty of water.
Call in ophthalmologist.
Remove contact lenses.
*If swallowed:
After swallowing:
Immediately make victim drink water (two glasses at most).
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available
ACCIDENTAL RELEASE MEASURES of POLYMERIC DIPHENYLMETHANE DIISOCYANATE (PMDI):
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains.
Collect, bind, and pump off spills.
Observe possible material restrictions.
Take up dry.
Dispose of properly.
Clean up affected area.
FIRE FIGHTING MEASURES of POLYMERIC DIPHENYLMETHANE DIISOCYANATE (PMDI):
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2)
Foam
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.
EXPOSURE CONTROLS/PERSONAL PROTECTION of POLYMERIC DIPHENYLMETHANE DIISOCYANATE (PMDI):
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection.
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A
-Control of environmental exposure:
Do not let product enter drains.
HANDLING and STORAGE of POLYMERIC DIPHENYLMETHANE DIISOCYANATE (PMDI):
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed.
Dry.
STABILITY and REACTIVITY of POLYMERIC DIPHENYLMETHANE DIISOCYANATE (PMDI):
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature) .
-Possibility of hazardous reactions:
No data available
