Dimethylthiotoulenediamine(DMTDA) curative or Polyurethane Elastomers

1. Product Overview:

Dimethylthiotoulenediamine (DMTDA) is equivalent to Ethacure 300 (Albemarle). It is a liquid aromatic diamine with low chronic toxicity, is an effective curative for polyurethane cast elastomers.It is used in both hot and room-temperature casting. It can also be used as a slower chain extender for polyurethane urea and polyurea elastomers in reaction injection molding, structural reaction injection molding and hand-applied and spray coating applications, alone or in blends with DETDA curative.

2. Physical and chemical properties:

• Appearance: Light yellowish liquid
• Boiling point,(℃):353
• Density (g/cm3) @(20): 1.2
• Pour point(℃): 4
• Flash point(℃):176
• Viscosity,cps @ 20:690
• Equivalent weight with isocyanates: 107
• Equivalent weight with epoxy resins: 53.5

3. Quality standard:

• Appearance: light yellowish liquid
• Color value: 8
• Diamine content(%): 99.0
• Amine value(mgKOH/g): 525-535
• Moisture(%): 0.1

4. Safety information:

• Class: 9
• Packing group: III
• UN No.: 3082
• EINECS NO.: 403-240-8

5. Packing size:

• 25kg/steel drum
• 200kg/steel drum
• According to customer requirements, with special packaging

6. Considerations:

• To be nitrogen-sealed, if cannot be used as a packaging, should be subject to nitrogen-sealed storage.
• Avoid outdoor exposure or long-term placement under high temperature conditions.
• This product is in storage, preferably above 0 centigrade degree, can guarantee the same long-term quality.
• Darkens with time and exposure to air.

7. Processing

Ethacure 300 is a low viscosity liquid that is ready for immediate use. Loading can be accomplised with simple hand pumps or gravity feed. Dry

nitrogen should be used to blanket curative tanks.

8. % Theory

Selection of 95% theory is generally recommended. Lowering it to 85% theory will improve compression set and raise 300% modulus (tensile). Increasing to 105% theory will enhance tear strength and elongation.

9. Mix ratio

The following equation calculates the amount of Ethacure 300 required for 100parts (by weight) of prepolymer.

% NCO ×2.55×%Theory=Ethacure 300pph

%Theory is expressed as a decimal,i.e. 95% Theory is 0.95 for the calculation.

Qingdao Exceed Fine Chemicals Co., Ltd is a high-tech enterprise that integrates manufacturing and trading. We specialize in the production of polyurethane-based products.

Our company is dedicated to investing in research and development of cutting-edge products, collaborating with leading Chinese universities and institutions. We have successfully developed a heat-vulcanization, environmentally friendly bonding adhesive that rivals the quality of world-renowned brands like Lord and Dow.

At Exceed, we believe in the power of science

Qingdao Exceed Fine Chemicals boasts a team of over 30 skilled technicians, supported by advanced manufacturing equipment and robust production processes. We maintain an independent R&D institute and foster strong collaborations with leading universities and research institutions to continuously enhance our production processes, product quality, and performance.

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 Furthermore, we employ a dedicated team of quality control (QC) professionals with expertise in the field of chemicals. This rigorous quality control ensures consistent and reliable product quality for our valued customers.

Currently, we achieve annual export sales exceeding USD 30 million to over 30 countries worldwide, encompassing a diverse product range including polyurethane chemicals, heat-vulcanization environmental friendly bonding adhesive etc.

We understand that customers prioritize competitive pricing, exceptional quality, and consistent product availability. We firmly believe that Exceedchem is the ideal partner to fulfill your specific needs.

As a trusted purchasing agent for clients worldwide, we leverage our extensive experience to source high-quality products at competitive prices. Our primary objective is to deliver the most cost-effective solutions while maintaining the highest standards of quality.