DMTDA (E-300 EQUIVALENT)

DMTDA (E-300 Equivalent) is a liquid aromatic diamine curing agent and chain extender used mainly in polyurethane, polyurea, polyurethane-polyurea hybrid, and selected epoxy systems, and DMTDA (E-300 Equivalent) is valued for low viscosity, room-temperature liquid handling, controlled reactivity, and strong elastomer performance.
DMTDA (E-300 Equivalent) is based on dimethylthiotoluenediamine chemistry and is commonly described as equivalent or similar to ETHACURE 300 type curatives, and DMTDA (E-300 Equivalent) is used where a liquid aromatic amine alternative to solid curatives such as MOCA is desired.
DMTDA (E-300 Equivalent) is typically supplied as an amber to brown low-viscosity liquid, and DMTDA (E-300 Equivalent) performance depends on isomer ratio, amine value, purity, moisture content, NCO/NH₂ stoichiometry, processing temperature, prepolymer type, and mixing quality.

CAS Number: 106264-79-3
EC Number: 403-240-8
Molecular Formula: C9H14N2S2
Molecular Weight: 214.35 g/mol

Synonyms: DMTDA (E-300 Equivalent), DMTDA, Dimethylthiotoluenediamine, Dimethyl Thio-Toluene Diamine, Di(methylthio)toluene Diamine, E-300 Equivalent, ETHACURE 300 Equivalent, Ethacure 300 Type Curative, Aromatic Diamine Curative, Polyurethane Chain Extender, Polyurea Curative, Liquid Diamine Chain Extender, DMTDA (E-300 Equivalent), DMTDA, Dimethylthiotoluenediamine, Dimethyl Thio-Toluene Diamine, Dimethylthiotoluene Diamine, Di(methylthio)toluene Diamine, Di(methylthio)toluene-2,4-diamine, Di(methylthio)toluene-2,6-diamine, Methylthio Toluene Diamine, Thio-Toluene Diamine, Toluene Diamine Sulfide, Aromatic Diamine Curative, Aromatic Amine Curative, Liquid Aromatic Diamine, Polyurethane Chain Extender, Polyurethane Curative, Polyurea Chain Extender, Polyurea Curative, Elastomer Curative DMTDA, Urethane Elastomer Curative, PU Elastomer Curative, E-300 Equivalent, Ethacure 300 Equivalent, Ethacure E-300 Equivalent, E300 Equivalent, DMTDA E-300 Equivalent, DMTDA Chain Extender, DMTDA Curing Agent, DMTDA Crosslinking Agent, DMTDA Hardener, DMTDA Amine Hardener, DMTDA Elastomer Hardener, DMTDA Polyurethane Additive, DMTDA Polyurea Additive, DMTDA Resin Curative, DMTDA Epoxy Curative, DMTDA Technical Grade, DMTDA Industrial Grade, DMTDA Chemical Grade, DMTDA High Purity, High Purity DMTDA, DMTDA Liquid, DMTDA Amine, DMTDA Aromatic Amine, DMTDA CAS 106264-79-3

APPLICATIONS

DMTDA (E-300 Equivalent) is used as a curing agent for isocyanate-terminated polyurethane prepolymers.
DMTDA (E-300 Equivalent) is incorporated into cast polyurethane elastomers to improve tensile strength, tear resistance, abrasion resistance, and dynamic performance.
DMTDA (E-300 Equivalent) is used in hot-cast and room-temperature processing systems where liquid handling improves production convenience.

DMTDA (E-300 Equivalent) is used as a chain extender in polyurethane elastomer systems.
DMTDA (E-300 Equivalent) is incorporated into MDI, TDI, and specialty isocyanate prepolymer systems depending on reactivity and final property requirements.
DMTDA (E-300 Equivalent) is used to produce wheels, rollers, pads, bushings, seals, screens, liners, and other industrial elastomer components.

DMTDA (E-300 Equivalent) is used in polyurea and polyurethane-polyurea hybrid coatings.
DMTDA (E-300 Equivalent) is incorporated into spray and cast systems where aromatic diamine reactivity supports rapid film or elastomer development.
DMTDA (E-300 Equivalent) is used in protective coatings, waterproofing systems, wear-resistant linings, and impact-resistant elastomeric surfaces.

DMTDA (E-300 Equivalent) is used as an alternative to MOCA in selected polyurethane elastomer formulations.
DMTDA (E-300 Equivalent) is easier to meter and mix than solid amine curatives because it is liquid at room temperature.
DMTDA (E-300 Equivalent) is used where lower processing temperature, reduced melting steps, and improved handling efficiency are desired.

DMTDA (E-300 Equivalent) is used in selected epoxy curing and modification systems where aromatic diamine functionality and sulfur-containing structure are useful.
DMTDA (E-300 Equivalent) is incorporated into specialty polymer systems requiring high-performance crosslinking and strong cured mechanical properties.
DMTDA (E-300 Equivalent) is valued because DMTDA (E-300 Equivalent) provides liquid aromatic diamine curing performance, strong elastomer properties, and practical processing advantages in polyurethane, polyurea, and specialty polymer systems.

DMTDA (E-300 Equivalent) is used as a curing agent for polyurethane elastomers.
DMTDA (E-300 Equivalent) helps extend and crosslink isocyanate-terminated prepolymers.
DMTDA (E-300 Equivalent) is used in cast polyurethane systems.
DMTDA (E-300 Equivalent) supports production of tough and durable elastomeric parts.

DMTDA (E-300 Equivalent) is used in polyurethane wheel formulations.
DMTDA (E-300 Equivalent) improves abrasion resistance and load-bearing performance.
DMTDA (E-300 Equivalent) is used in industrial roller coverings.
DMTDA (E-300 Equivalent) helps provide wear resistance in demanding mechanical applications.

DMTDA (E-300 Equivalent) is used in polyurethane pads and bumpers.
DMTDA (E-300 Equivalent) supports resilience, impact resistance, and dimensional stability.
DMTDA (E-300 Equivalent) is used in molded polyurethane components.
DMTDA (E-300 Equivalent) helps create parts with high mechanical strength.

DMTDA (E-300 Equivalent) is used in polyurethane screen panels.
DMTDA (E-300 Equivalent) supports abrasion resistance in mining and aggregate processing equipment.
DMTDA (E-300 Equivalent) is used in polyurethane liners.
DMTDA (E-300 Equivalent) helps protect surfaces from wear, impact, and erosion.

DMTDA (E-300 Equivalent) is used in polyurethane seals and gaskets.
DMTDA (E-300 Equivalent) improves elasticity and long-term sealing performance.
DMTDA (E-300 Equivalent) is used in polyurethane bushings.
DMTDA (E-300 Equivalent) supports strength and fatigue resistance under repeated stress.

DMTDA (E-300 Equivalent) is used in automotive polyurethane components.
DMTDA (E-300 Equivalent) helps produce durable parts exposed to vibration and mechanical load.
DMTDA (E-300 Equivalent) is used in transportation elastomer systems.
DMTDA (E-300 Equivalent) supports toughness and resistance to wear in moving components.

DMTDA (E-300 Equivalent) is used in footwear polyurethane formulations.
DMTDA (E-300 Equivalent) helps improve sole durability and repeated-flex performance.
DMTDA (E-300 Equivalent) is used in sports equipment elastomers.
DMTDA (E-300 Equivalent) supports impact resistance and elastic recovery.

DMTDA (E-300 Equivalent) is used in polyurethane adhesive formulations.
DMTDA (E-300 Equivalent) improves cohesive strength in compatible adhesive systems.
DMTDA (E-300 Equivalent) is used in polyurethane sealant formulations.
DMTDA (E-300 Equivalent) supports elastic curing and durable joint performance.

DMTDA (E-300 Equivalent) is used in protective coating systems.
DMTDA (E-300 Equivalent) helps improve hardness, toughness, and chemical resistance.
DMTDA (E-300 Equivalent) is used in spray-applied polyurethane and polyurea systems.
DMTDA (E-300 Equivalent) supports rapid curing in compatible high-performance coatings.

DMTDA (E-300 Equivalent) is used in waterproofing membranes.
DMTDA (E-300 Equivalent) helps create flexible and durable protective layers.
DMTDA (E-300 Equivalent) is used in floor coating formulations.
DMTDA (E-300 Equivalent) supports abrasion resistance and mechanical durability.

DMTDA (E-300 Equivalent) is used in potting and encapsulation materials.
DMTDA (E-300 Equivalent) helps protect components from vibration, moisture, and mechanical stress.
DMTDA (E-300 Equivalent) is used in electrical insulation compounds.
DMTDA (E-300 Equivalent) supports durable cured polymer networks in compatible systems.

DMTDA (E-300 Equivalent) is used in polyurethane composite systems.
DMTDA (E-300 Equivalent) helps bind fillers, fibers, and reactive resin components.
DMTDA (E-300 Equivalent) is used in specialty elastomer development.
DMTDA (E-300 Equivalent) supports formulation control of hardness, toughness, and processing time.

DMTDA (E-300 Equivalent) is used in research and development of aromatic amine curing systems.
DMTDA (E-300 Equivalent) helps evaluate cure speed, pot life, hardness, and elastomer performance.
DMTDA (E-300 Equivalent) is used in applications requiring an E-300-type liquid curative.
DMTDA (E-300 Equivalent) supports polyurethane and polyurea systems requiring strong mechanical properties.

DMTDA (E-300 Equivalent) performance also depends on prepolymer NCO content, mixing quality, and curing schedule.
DMTDA (E-300 Equivalent) should be tested in the target polyurethane system before commercial use.
DMTDA (E-300 Equivalent) should be stored in tightly closed containers.
DMTDA (E-300 Equivalent) should be protected from moisture, heat, and incompatible materials.

DMTDA (E-300 Equivalent) should be handled with suitable ventilation and protective equipment.
DMTDA (E-300 Equivalent) may cause skin, eye, or respiratory irritation depending on exposure conditions.
DMTDA (E-300 Equivalent) should be used according to supplier safety data and regulatory requirements.
DMTDA (E-300 Equivalent) quality may be defined by amine value, purity, viscosity, color, moisture, and isomer composition.

DMTDA (E-300 Equivalent) is important in cast elastomers, coatings, adhesives, sealants, and specialty polyurethane systems.
DMTDA (E-300 Equivalent) is valued for combining aromatic diamine reactivity with practical liquid processing.
DMTDA (E-300 Equivalent) supports cured materials requiring toughness, elasticity, abrasion resistance, and mechanical durability.

DESCRIPTION

DMTDA (E-300 Equivalent) is an aromatic diamine curative based on dimethylthiotoluenediamine, and commercial material is generally a mixture of 2,4- and 2,6-isomers.
DMTDA (E-300 Equivalent) is commonly described as an ETHACURE 300 equivalent or similar product, and ETHACURE 300 technical information describes the chemistry as a liquid aromatic diamine curative for polyurethane, polyurea, and hybrid formulations.
DMTDA (E-300 Equivalent) reacts with isocyanate groups to form urea linkages, and this reaction provides fast strength development and durable elastomer networks.

DMTDA (E-300 Equivalent) is liquid at room temperature, and this improves handling, metering, mixing, and low-temperature processing compared with solid aromatic diamine curatives.
DMTDA (E-300 Equivalent) has lower equivalent weight than some traditional curatives, so formulation stoichiometry should be calculated carefully and not substituted only by weight.
DMTDA (E-300 Equivalent) can provide long working time compared with very fast aliphatic diamines while still supporting strong final cure and high-performance elastomer properties.

DMTDA (E-300 Equivalent) should be handled with care because aromatic amines may cause skin and eye irritation, sensitization, and other health hazards depending on exposure.
DMTDA (E-300 Equivalent) should be protected from moisture, oxidizers, acids, and incompatible reactive chemicals to maintain amine value and processing consistency.
DMTDA (E-300 Equivalent) should be used according to supplier recommendations, polyurethane processing requirements, workplace safety standards, and applicable chemical regulations.

DMTDA (E-300 Equivalent) is an aromatic diamine curing agent.
DMTDA (E-300 Equivalent) is commonly used as a liquid chain extender for polyurethane elastomers.
DMTDA (E-300 Equivalent) is associated with dimethylthio-toluenediamine chemistry.
DMTDA (E-300 Equivalent) is designed to provide performance similar to Ethacure 300-type curatives.

DMTDA (E-300 Equivalent) is typically supplied as an amber to brown liquid.
DMTDA (E-300 Equivalent) contains aromatic amine functionality that reacts with isocyanate groups.
DMTDA (E-300 Equivalent) forms urea linkages in polyurethane and polyurea systems.
DMTDA (E-300 Equivalent) helps create tough, elastic, and abrasion-resistant cured materials.

DMTDA (E-300 Equivalent) is valued for liquid handling and convenient processing.
DMTDA (E-300 Equivalent) can provide longer working time than some faster aromatic diamine curatives.
DMTDA (E-300 Equivalent) can improve mechanical strength and heat resistance in suitable formulations.
DMTDA (E-300 Equivalent) performance depends on isocyanate type, stoichiometry, temperature, and catalyst system.

PROPERTIES

Chemical Formula: C9H14N2S2
Molecular Weight: 214.35 g/mol
Common Name: DMTDA (E-300 Equivalent)
Chemical Type: Aromatic diamine; polyurethane curative; chain extender; polyurea curative
Appearance: Amber to brown liquid
Odor: Mild amine/sulfur-like characteristic odor
Isomer Composition: Mixture of dimethylthiotoluenediamine isomers, grade dependent
Solubility: Slightly soluble in water; soluble or miscible with many organic solvents and polyurethane formulation components
Density: Approximately 1.20 g/cm³, grade dependent
Viscosity: Low to moderate liquid viscosity, temperature dependent
Boiling Point: High boiling; grade dependent
Amine Functionality: Diamine curative with two primary aromatic amine groups
Reactivity: Reacts with isocyanates, epoxy groups, acids, oxidizers, and other reactive chemicals
Stability: Stable under recommended dry storage; protect from moisture, oxidation, heat, and contamination
Storage Temperature: 15–30°C, tightly closed, dry, well-ventilated
Shelf Life: Typically 12–24 months in original sealed packaging, supplier dependent

FIRST AID

Inhalation:
Move to fresh air if vapors, aerosols, or mist are inhaled.
Seek medical attention if coughing, respiratory irritation, dizziness, headache, or breathing discomfort occurs.
Avoid further exposure until ventilation and handling controls are confirmed.

Skin Contact:
Remove contaminated clothing and wash skin thoroughly with soap and water.
Seek medical advice if irritation, redness, staining, or sensitization symptoms develop.
Wash contaminated clothing before reuse.

Eye Contact:
Rinse cautiously with water for at least 15 minutes.
Remove contact lenses if present and easy to do, then continue rinsing.
Seek medical attention if irritation persists or if exposure is significant.

Ingestion:
Rinse mouth with water and do not induce vomiting.
Seek immediate medical attention or contact a poison center.
Never give anything by mouth to an unconscious person.

Note to Physicians:
Treat symptomatically.
Monitor for irritation, sensitization, and systemic effects associated with aromatic amine exposure.
Provide supportive care as needed.

HANDLING AND STORAGE

Handling:
Use appropriate PPE including chemical-resistant gloves, goggles, protective clothing, and respiratory protection where exposure assessment requires it.
Avoid breathing vapors, aerosols, or mist and avoid skin and eye contact.
Use clean, dry equipment and accurate metering systems to maintain correct stoichiometry in polyurethane and polyurea formulations.

Ventilation:
Use local exhaust ventilation during weighing, mixing, pouring, and heated processing.
Avoid handling in confined spaces without adequate airflow.
Use appropriate respiratory protection if vapors, aerosols, or heated fumes cannot be controlled.

Storage:
Store in tightly closed containers in a cool, dry, well-ventilated area.
Protect from moisture, heat, direct sunlight, oxidation, and contamination.
Keep away from strong oxidizers, strong acids, acid chlorides, anhydrides, isocyanates except controlled formulation use, and incompatible reactive chemicals.

Spill and Leak Procedures:
Ventilate the area and restrict access to trained personnel.
Contain spill with inert absorbent and collect into suitable chemical waste containers.
Prevent entry into drains and dispose of waste according to local regulations and facility procedures.

Handling Precautions:
Calculate stoichiometry carefully because DMTDA (E-300 Equivalent) dosage affects pot life, hardness, tensile strength, tear resistance, and final elastomer performance.
Control temperature and mixing quality because viscosity, reaction rate, air entrapment, and cure profile depend strongly on processing conditions.
Rotate stock using FIFO practices to maintain consistent amine value, color, viscosity, and curing performance.