Quick Search
DIMACIT TMTD-PDR is widely used in natural rubber (NR), styrene-butadiene rubber (SBR), nitrile rubber (NBR), and EPDM compounds.
DIMACIT TMTD-PDR is applied in the manufacture of tires, belts, hoses, seals, gaskets, and molded rubber goods.
DIMACIT TMTD-PDR is especially useful where fast curing and good aging resistance are required.
CAS Number: 137-26-8
Molecular Formula: C6H12N2S4
Molecular Weight: 240.43
EINECS Number: 205-286-2
Synonyms: thiram, Tetramethylthiuram disulfide, 137-26-8, Thiuram, Rezifilm, TMTD, Pomarsol, Thirame, Arasan, Fernasan, Nobecutan, Normersan, Aapirol, Puralin, Spotrete, Thiosan, Thirasan, Tetrathiuram disulfide, Tetramethylthiuram, Falitiram, Formalsol, Hexathir, Kregasan, Mercuram, Sadoplon, Tetrasipton, Thillate, Thiramad, Aatiram, Atiram, Fermide, Fernide, Hermal, Pomasol, Thiulin, Thiulix, Anles, Heryl, Pomarsol forte, Methyl tuads, Accelerator T, Methyl Thiram, Fernasan A, Nocceler TT, Arasan-M, Thiram B, TMTDS, Arasan-SF, Cyuram DS, Ekagom TB, Tetramethylthiuram disulphide, Hermat TMT, Fernacol, Radothiram, Tetrapom, Thioknock, Thirampa, Thiramum, Accel TMT, Accelerator thiuram, Delsan, Thimer, Aceto TETD, Aules, Bis(dimethylthiocarbamoyl) disulfide, Royal TMTD, Arasan-SF-X, Tetramethyl-thiram disulfid, Tetramethylenethiuram disulfide, Panoram 75, Tetramethylthiuram bisulfide, Arasan 70, Arasan 75, Spotrete-F, Tersan 75, Thiram 75, Thiram 80, Tetramethylthiurane disulfide, Arasan 70-S Red, Micropearls, Tetramethylthioperoxydicarbonic diamide, Cunitex, Metiurac, Nomersan, Thiuramyl, Thylate, Tulisan, Metiur, N,N-Tetramethylthiuram disulfide, Pol-Thiuram, 1,1’-dithiobis(n,n-dimethylthio-formamid;1,1’-dithiobis(n,n-dimethylthioformamide);Aapirol;Accel TMT;Accelerator T;Accelerator Thiuram;acceleratort;acceleratorthiuram
DIMACIT TMTD-PDR is a commercial grade of TMTD (Tetramethylthiuram Disulfide) supplied in pre-dispersed or pelletized (PDR = Pre-Dispersed Rubber) form for rubber processing applications.
DIMACIT TMTD-PDR is mainly used as an ultra-accelerator and secondary vulcanizing agent in sulfur-cured rubber compounds.
The product form is designed to improve handling safety, dosing accuracy, and dispersion in rubber matrices.
Chemically, it is based on DIMACIT TMTD-PDR, a thiuram-type sulfur-containing compound.
The molecule consists of two dimethylthiocarbamoyl groups linked by a disulfide bond.
This structure allows it to act as both a sulfur donor and an accelerator in vulcanization reactions.
DIMACIT TMTD-PDR is supplied as dust-free pellets, granules, or polymer-bound masterbatch.
The active DIMACIT TMTD-PDR is dispersed in an elastomer carrier such as EPDM, SBR, or natural rubber.
This form improves flowability, reduces airborne dust, and ensures uniform distribution during mixing.
During vulcanization, DIMACIT TMTD-PDR decomposes to generate active sulfur species.
These sulfur radicals promote rapid crosslink formation between rubber polymer chains.
This results in faster cure rates, shorter scorch time, and efficient crosslink density development.
DIMACIT TMTD-PDR is also used as a sulfur donor in low-sulfur or sulfur-free curing systems.
It helps improve heat resistance and reduces reversion in rubber products.
DIMACIT TMTD-PDR is often combined with other accelerators such as MBT, MBTS, or CBS to optimize cure profiles.
From a safety perspective, DIMACIT TMTD-PDR is classified as harmful if swallowed and may cause skin and eye irritation.
DIMACIT TMTD-PDR may cause allergic skin reactions and is classified as a skin sensitizer.
Prolonged exposure should be avoided and appropriate personal protective equipment should be used.
Inhalation of dust from pure DIMACIT TMTD-PDR can irritate the respiratory tract, but the PDR form significantly reduces this risk.
However, fumes produced during rubber curing may contain hazardous decomposition products.
Adequate ventilation is required in processing areas.
DIMACIT TMTD-PDR has been classified as toxic to aquatic organisms with long-lasting effects.
Release to the environment should be avoided and waste must be disposed of according to regulations.
Some regulatory restrictions apply to its use, especially in products with potential human contact.
DIMACIT TMTD-PDR should be stored in a cool, dry place away from heat, acids, and oxidizing agents.
It should be kept in sealed packaging to prevent moisture uptake and degradation.
DIMACIT TMTD-PDR is compatible with most rubber polymers, fillers, and processing oils, but should not be mixed directly with strong oxidizers.
DIMACIT TMTD-PDR is toxic to aquatic life and must not be released into wastewater systems.
Waste rubber and processing residues should be disposed of as regulated industrial waste.
Environmental exposure must be strictly controlled.
Regulatory restrictions apply in some regions due to potential formation of nitrosamines.
DIMACIT TMTD-PDRs use may be limited in products intended for prolonged human contact.
Compliance with REACH and local occupational safety regulations is required.
DIMACIT TMTD-PDR should be stored in cool, dry, well-ventilated areas away from heat sources.
Packaging must be kept sealed to prevent moisture absorption and degradation of the rubber carrier.
Direct sunlight and oxidizing agents should be avoided.
DIMACIT TMTD-PDR is compatible with most elastomers, fillers, plasticizers, antioxidants, and processing oils.
However, it should not be mixed directly with strong oxidizing chemicals or peroxides.
Proper formulation sequencing is required to prevent premature curing (scorch).
Melting point : 156–158 °C (lit.)
Boiling point : 129 °C (at 20 mmHg)
Density : 1.43
Vapor pressure : 8 × 10⁻⁶ mmHg at 20 °C (NIOSH, 1997)
Refractive index : 1.5500 (estimate)
Flash point : 89 °C
Storage temperature : Under inert gas (argon)
Solubility : 0.0184 g/L
Form : Solid
pKa : 0.87 ± 0.50 (predicted)
Water solubility : 16.5 mg/L at 20 °C
Merck : 14,9371
BRN : 1725821
Exposure limits : NIOSH REL TWA 0.5 mg/m³, IDLH 100 mg/m³; OSHA PEL 0.5 mg/m³; ACGIH TLV TWA 5 mg/m³
Cosmetics Ingredients Functions : ANTIMICROBIAL
InChI : InChI=1S/C6H12N2S4/c1-7(2)5(9)11-12-6(10)8(3)4/h1-4H3
InChIKey : KUAZQDVKQLNFPE-UHFFFAOYSA-N
SMILES : CN(C)C(=S)SSC(=S)N(C)C
LogP : 1.730
DIMACIT TMTD-PDR is a commercial rubber additive based on tetramethylthiuram disulfide (TMTD) supplied in a pre-dispersed rubber (PDR) carrier system.
DIMACIT TMTD-PDR is designed to function as an ultra-fast accelerator and sulfur donor in rubber vulcanization systems.
The pre-dispersed form improves processing safety, mixing efficiency, and batch-to-batch consistency in rubber manufacturing.
Chemically, the active component is DIMACIT TMTD-PDR, belonging to the thiuram class of accelerators.
It consists of two dimethylthiocarbamoyl groups connected by a disulfide linkage.
This sulfur-rich structure allows it to participate directly in crosslink formation without requiring large amounts of elemental sulfur.
Physically, DIMACIT TMTD-PDR is supplied as pellets, granules, or sheets depending on supplier specification.
The accelerator is uniformly dispersed in an elastomeric carrier such as natural rubber (NR), SBR, or EPDM.
This form eliminates powder dust, improves flow during weighing, and ensures homogeneous distribution in rubber compounds.
The PDR form melts and disperses rapidly during internal mixing or milling.
DIMACIT TMTD-PDR prevents local over-concentration of accelerator, which can cause scorch or uneven curing.
This leads to improved mechanical consistency of finished rubber products.
During vulcanization, DIMACIT TMTD-PDR thermally decomposes to generate active sulfurating intermediates.
These intermediates form crosslinks between rubber polymer chains, creating a three-dimensional elastic network.
This results in very fast cure rates and high crosslink efficiency.
Because it also acts as a sulfur donor, TMTD allows formulation of low-sulfur or sulfur-free vulcanization systems.
This reduces reversion and improves thermal aging resistance of rubber products.
It also improves compression set and long-term durability.
DIMACIT TMTD-PDR is widely used in natural rubber (NR), SBR, NBR, EPDM, and some specialty elastomers.
It is applied in manufacturing of tires, conveyor belts, hoses, seals, gaskets, vibration dampers, and molded rubber parts.
It is particularly suitable for thick sections requiring uniform curing.
DIMACIT TMTD-PDR is often used in combination with thiazole or sulfenamide accelerators to control scorch safety and cure speed.
This allows optimization of processing window and final mechanical properties.
Such combinations improve tensile strength, modulus, and fatigue resistance.
In sulfur-donor systems, it is used where low sulfur bloom and low nitrosamine formation are required.
DIMACIT TMTD-PDR helps meet environmental and performance standards in automotive rubber parts.
It is also useful in rubber-to-metal bonded products where heat resistance is critical.
From a safety standpoint, DIMACIT TMTD-PDR is classified as harmful if swallowed and irritating to skin and eyes.
It may cause allergic skin sensitization after repeated exposure.
Direct contact with raw material should be minimized even in PDR form.
During curing, decomposition products such as carbon disulfide and nitrogen-containing gases may be released.
These fumes may be harmful if inhaled in enclosed spaces.
Local exhaust ventilation is required in vulcanization areas.
Uses:
DIMACIT TMTD-PDR is used as an ultra-accelerator and sulfur donor in rubber vulcanization systems.
DIMACIT TMTD-PDR significantly increases curing speed and shortens vulcanization time.
This improves production efficiency in rubber processing operations.
DIMACIT TMTD-PDR is used in natural rubber (NR), styrene-butadiene rubber (SBR), nitrile rubber (NBR), and EPDM formulations.
It provides efficient crosslink formation and uniform curing throughout thick rubber sections.
This ensures consistent mechanical properties in finished products.
DIMACIT TMTD-PDR is widely applied in the manufacture of tires, inner tubes, conveyor belts, hoses, seals, gaskets, vibration isolators, and molded rubber components.
It supports fast molding cycles and high throughput in industrial production.
It improves productivity in both compression and injection molding processes.
DIMACIT TMTD-PDR is used in low-sulfur and sulfur-free curing systems as a sulfur donor accelerator.
It helps reduce reversion and improves heat-aging resistance of vulcanized rubber.
This is important for rubber parts exposed to high temperatures.
It is commonly used in combination with other accelerators such as MBT, MBTS, CBS, or TBBS.
This allows better control of scorch safety and cure profile.
DIMACIT TMTD-PDR enables formulators to balance processing safety with fast final cure.
It is useful in rubber-to-metal bonding applications where strong adhesion and heat resistance are required.
DIMACIT TMTD-PDR improves durability of bonded assemblies used in automotive and industrial components.
DIMACIT TMTD-PDR supports long-term mechanical stability under dynamic loading.
Because it is supplied in pre-dispersed rubber (PDR) form, it improves mixing uniformity and dosing accuracy.
It reduces dust exposure and improves workplace safety.
DIMACIT TMTD-PDR also reduces risk of localized over-acceleration and scorch.
DIMACIT TMTD-PDR is suitable for both batch mixing and continuous rubber processing systems.
It supports consistent quality in large-scale rubber manufacturing.
DIMACIT TMTD-PDR is widely used in automotive, construction, mining, and industrial rubber sectors.
DIMACIT TMTD-PDR is used as an ultra-fast vulcanization accelerator and sulfur donor in rubber compounding.
It significantly reduces cure time and increases crosslink efficiency.
This enables faster molding cycles and improved plant productivity.
DIMACIT TMTD-PDR is applied in a wide range of elastomer systems including natural rubber (NR), SBR, NBR, EPDM, and certain synthetic blends.
It ensures uniform crosslinking even in thick or complex-shaped rubber parts.
This leads to improved mechanical consistency and dimensional stability.
DIMACIT TMTD-PDR is widely used in production of automotive and industrial rubber goods such as tires, sidewalls, inner tubes, conveyor belts, hoses, seals, gaskets, vibration dampers, bushings, and molded technical parts.
It supports rapid cure in compression molding, transfer molding, and injection molding processes.
DIMACIT TMTD-PDR improves output efficiency in high-volume rubber manufacturing.
DIMACIT TMTD-PDR is especially valuable in low-sulfur or sulfur-free curing systems where it acts as the primary sulfur donor.
It reduces reversion at high temperatures and improves aging resistance of rubber products.
This is critical for components exposed to heat, oil, and mechanical stress.
It is commonly combined with thiazole and sulfenamide accelerators to fine-tune cure profile.
This combination improves scorch safety while maintaining fast final cure.
DIMACIT TMTD-PDR allows better control of processing window during mixing, extrusion, and molding.
DIMACIT TMTD-PDR is used in rubber-to-metal bonding systems to enhance crosslink density at the interface.
This improves adhesion strength and durability of bonded components.
It is important in automotive mounts, bushings, and vibration isolation parts.
The PDR (pre-dispersed rubber) form improves dispersion of the accelerator in the rubber matrix.
DIMACIT TMTD-PDR prevents local over-concentration that can cause scorching or uneven cure.
It also reduces dust formation and improves workplace safety.
It is suitable for use in internal mixers, open mills, and continuous compounding systems.
DIMACIT TMTD-PDR ensures reproducible performance in both small-scale and industrial production.
It supports high-quality, defect-free rubber products.
DIMACIT TMTD-PDR is also used in specialty rubber applications where fast curing and high crosslink density are required.
This includes rubber goods used in mining, construction, oil and gas, and heavy industry.
It supports long service life under harsh operating conditions.
Safety Profile:
DIMACIT TMTD-PDR contains tetramethylthiuram disulfide, which is harmful if swallowed and may cause skin and eye irritation.
Direct contact with the raw material can result in redness, itching, or burning sensation.
Prolonged exposure should be avoided even though the PDR form reduces direct dust contact.
DIMACIT TMTD-PDR is classified as a skin sensitizer and may cause allergic skin reactions after repeated exposure.
Once sensitized, individuals may react to very small amounts.
Appropriate protective gloves and protective clothing are required during handling.
Although the PDR form significantly reduces airborne dust, inhalation of decomposition fumes during rubber curing may be harmful.
Thermal decomposition can release carbon disulfide, nitrogen oxides, and other toxic gases.
Local exhaust ventilation is required in mixing and vulcanization areas.
Accidental ingestion may cause gastrointestinal irritation, nausea, and dizziness.
Ingestion of large quantities requires immediate medical attention.
Food and drink should be kept away from processing areas.
DIMACIT TMTD-PDR is not highly flammable, but it can decompose when exposed to high temperatures.
During fire, toxic and irritating fumes may be released.
Firefighters must use self-contained breathing apparatus and protective clothing.
