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Number:
2-1
First DPG(D)-80
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Accelerator
Guanidine-based accelerators
Keywords:
- Chemical composition: Diphenylguanidine
- Complex carrier: EPDM/SBR
- Characteristics: A medium-speed accelerator commonly used for both natural and synthetic rubbers, it exhibits no vulcanization-promoting effect on IIR or EPDM but acts as a plasticizer and scorch inhibitor in CR. Its critical vulcanization temperature is 141°C, resulting in poor vulcanization flatness and relatively slow curing rates. However, the resulting rubber compound is highly safe to handle. When used alone, the cured rubber shows poor aging resistance, necessitating the addition of an antioxidant. It is frequently employed as an activator in thiazole, thiourea, and dithiocarbamate systems and, when combined with DM and TMTD, can be effectively utilized in continuous vulcanization processes.
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