What is the percentage of ethyl silicate and organotin in the formula of silicone rubber curing agent?
It is a kind of diacyl organic peroxide, which is a white and slightly yellow paste. Used as extrusion silicone rubber vulcanizing agent, the product has high strength and good transparency. Reference cross-linking temperature and dosage (depending on the requirements of different rubber types and products): temperature > 90℃; dosage: 1~2.5%. Soluble in benzene solvent insoluble in water, ethanol, etc.
Silicone curing agent is toxic
Silicone curing agent should be low or slightly toxic, because the curing agent mainly includes ethyl orthosilicate and organotin, of which ethyl orthosilicate is low toxicity, organotin is a toxic compound, but the dosage is very small, there is no effect on the body, you can rest assured that the use.
New silicone curing agent
Cross-linking agent XR-500 is a new silicone curing agent, is an epoxy silane type of cross-linking agent, mainly for water-based systems containing carboxyl, amino, hydroxyl, the reaction mechanism is the cross-linking agent in the epoxy group and water-based resin hydrophilic group carboxyl, amino, hydroxyl reaction; alkoxy and water hydrolysis condensation reaction to form a silicone bond, thereby significantly improving the adhesion of the coating film to the substrate and water resistance. This product is an environmentally friendly non-toxic cross-linking agent, especially surprising is that the water-based system with XR-500 cross-linking agent has an unusually long service life, up to one year at room temperature, so it can be formulated into a stable one-component coating.
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