Introduction of Silicone Rubber Curing Agent

Silicon rubber vulcanization system , a vulcanizing agent, sulfur is used first , the process of crosslinking silicone rubber vulcanization immediately named . With the development of science silicone rubber , it was found that the conventional system can not meet the sulfur in the actual production of silicone rubber needs new peroxide vulcanizing agent , a metal oxide , a resin compound, a quinone derivative , and other non- sulfur-based vulcanizing agents have come into being , and to play an increasingly important role in the processing of silicon rubber vulcanization process.

    As the silicone rubber curing agent , the development of sulfur over a hundred years . Compared with other types of low sulfur prices , creating a better overall performance of vulcanized rubber , thus curing agent is still the leading international silicone rubber industry, accounting for dozens of organic and inorganic curing agent constitutes 85% of the total . In order to meet the needs of the development of silicone rubber , sulfur emerging new products , such as France MLPC International produced S80 GA F500 ( yellow granular product ) , which is a pre sulfur in acid derivatives elastomer dispersion in which the sulfur content of 80 %. The product is no dust, no pollution ; sticky at room temperature for easier feeding and weighing ; products with a variety of silicone rubber elastomer compatibility , and can be used in tires, shoe soles, conveyor belts , hoses, transparent and color products.

    Common sulfur vulcanized silicone rubber when parked prone to bloom , and have a tendency to scorch , greatly affect the performance of the final product. To compensate for the lack of sulfur , people began the modification of sulfur , successful example is insoluble polymeric form of sulfur or sulfur (Insoluble Sulfur), referred to as the IS, which is not soluble in carbon disulfide sulfur linear polymer polymeric sulfur is sulfur μ type body . This aggregation state average molecular weight sulfur great, through constant verification, it is generally considered a molecular weight of 30,000 to 40,000.

    With the increasing variety of silicone , silicone rubber functional requirements continue to increase , as the silicone rubber vulcanization agent sulfur series has been unable to dominate the world , so other non- sulfur vulcanizing agent and the rapid development of new curing system , such as peroxides and metal oxides.

    For some special silicone rubber ( chloroprene mainly refers to silicone rubber, silicone rubber and halogenated butyl rubber, carboxy tetrasilene ) , the metal oxides may also be used as a vulcanizing agent . Metal oxides are mainly used to refer to zinc oxide , magnesium oxide, calcium oxide and lead oxide , zinc oxide and magnesium oxide in which more applications . As a curing agent, both of which can separate the silicone rubber vulcanized neoprene , but with the best results , both can take full advantage of their curing time , making vulcanized rubber produced both better performance and storage scorch safety, but also ensures a faster cure rate and flat vulcanizability .