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| Name | Exterior view | Chemical composition | Complex carrier | Characteristics |
|---|---|---|---|---|
| First HMMM-50 |  |
Chemical composition: Hexamethoxymethylmelamine | Complex carrier: EPDM/SBR | Characteristics: In the "meta-methyl white (HRH)" system, the rubber adhesive reacts with methylene acceptors at vulcanization temperatures, effectively bonding rubber and reinforcing materials. When used as a curing agent, it reacts with non-reactive phenolic resins to form thermosetting resins, significantly enhancing the rubber's strength, modulus, hardness, and tear resistance. Compared to HMT, this product is more environmentally friendly, with extremely low formaldehyde content. |
| First HMT(H)-80 |  |
Chemical composition: Hexamethylenetetramine | Complex carrier: EPDM/SBR | Characteristics: A slow, weak accelerant for rubber, often used as a secondary accelerator; it has a critical vulcanization temperature of 140°C—below this temperature, its activity is very poor, but it poses minimal scorch risk. Zinc oxide enhances its effectiveness, while clay and carbon black tend to inhibit it. The compound disperses easily in rubber compounds without causing contamination or discoloration. It is primarily used in the production of light-colored, transparent, and thick products. Additionally, when combined with HMT, resorcinol, and white carbon black to form the "Meta-White (HRH)" system, it significantly boosts the adhesion strength between rubber and fibrous materials. |
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