What is vulcanizing agent
1. In natural rubber, the combination of vulcanizing agent and sulfur can prevent vulcanization reversion, improve heat resistance, reduce heat generation, anti-aging, and improve the adhesion between rubber and cord and the modulus of vulcanized rubber. It is mainly used in the shoulder rubber of the tire and the rubber of the buffer layer, which can solve the problem of the shoulder empty of the biased truck tire, and can also be used for the large-sized and thick natural rubber products and various rubber miscellaneous products.
2. Vulcanizing agents can be divided into two categories: inorganic and organic. Inorganic vulcanizing agents mainly include sulfur, sulfur monochloride, selenium, tellurium, etc. Organic vulcanizing agents include accelerators TMTD, organic peroxides such as benzoyl peroxide, quinone oxime compounds, and the like. Rubber vulcanizing agents include elemental sulfur, selenium, tellurium, sulfur-containing compounds, peroxides, quinone compounds, amine compounds, resin compounds, metal oxides, and isocyanates.
What are the functions of vulcanizing agents?
1. All substances in the rubber compound that can speed up the vulcanization reaction, shorten the vulcanization time, reduce the vulcanization temperature, reduce the amount of the vulcanizing agent, and can improve or improve the physical and mechanical properties of the vulcanizate are collectively referred to as vulcanization accelerators, referred to as accelerators. Accelerators can also improve vulcanization production efficiency and vulcanizate quality, make thick products evenly vulcanized, and reduce product costs.
2. In chloroprene rubber, chlorosulfonated polyethylene rubber, styrene-butadiene rubber, nitrile rubber, isoprene rubber, butyl rubber, bromobutyl rubber, acrylate rubber, silicone rubber and rubber-plastic combination rubber, etc. In special rubber, as an auxiliary vulcanizing agent, it can significantly improve the related properties and heat resistance. It is suitable for high-temperature vulcanization systems, and it is very obvious to reduce the compression set. It can also reduce the amount of peroxide and prevent the rubber compound during processing. Scorch, improve the bonding strength of rubber compound and cord and metal.
3. Anti-scorch agent This product is a sulfur-free vulcanizing agent, mainly used for cable rubber. It can replace all sulfur-containing vulcanizing agents such as thiazoles and thiurams, and can solve the problem of copper wires and copper electrical appliances due to contact with sulfur-containing vulcanizing agents. The problem of blackening of copper sulfide pollution.