Shenyang SUNNYJOINT as a supplier of Rubber Additives, Insoluble Sulfur, molecular formula: Su, is a non-toxic, flammable yellow powder, named after it is insoluble in carbon disulfide. It is obtained by ordinary sulfur thermal polymerization, and the number of sulfur atoms in the molecular chain is as high as 108 or more. The viscoelasticity and molecular weight distribution of the polymer are also called elastic sulfur or polymeric sulfur, which belongs to inorganic polymer chemical raw materials.
advantage
1) Insoluble sulfur exists in a dispersed state in the rubber, so that the rubber does not bloom, has good viscosity, and at the same time ensures the appearance quality of the light colored product.
2) Insoluble sulfur is uniformly dispersed in the rubber compound, effectively resists the aggregation of sulfur and reduces the tendency of scorching during the storage of the rubber compound.
3) Insoluble sulfur does not spray the rubber during the storage period, and the performance of the rubber composition is uniform. Prevent contamination of products and molds, and remove the grouting process added to overcome frosting, providing conditions for production linkage.
4) Insoluble sulfur causes the rubber to migrate without migration in adjacent layers. Especially in the rubber of butyl butadiene rubber and butyl rubber, the migration rate of ordinary sulfur is high, and it can be avoided after adding insoluble sulfur.
5) Insoluble sulfur shortens the time of vulcanization. When the vulcanization temperature is reached, it has an "activation phase", that is, chain depolymerization, which accelerates the vulcanization rate and reduces the amount of sulfur, which is beneficial to the improvement of the aging property of the product.
use
Insoluble sulfur, which is mainly used as a high-level accelerator and vulcanizing agent in the rubber industry, is widely used in the manufacture of tires and other rubber composite products, such as tire carcass rubber compound, cushion rubber compound, white tire side rubber and The rubber, which is bonded to the skeleton material such as tires, hoses and tapes, can also be used in rubber materials such as cables, rubber rollers, oil seals, rubber shoes, etc., and also in light-colored rubber products with large sulfur content. Because the insoluble sulfur can make the meridian, the steel wire and the rubber stick more firmly, effectively prevent the rubber material from blooming, and improve the heat resistance and wear resistance of the tire. Therefore, insoluble sulfur is an essential raw material in tire production.
At present, sulfur is used as a vulcanizing agent in the rubber industry. As a variant of sulfur (S), insoluble sulfur (IS) is widely used in tires, rubber shoes, hoses, tapes and sundries at home and abroad. It has been manufactured and has been commonly used in the bonding of rubber and steel wire.
Insoluble sulfur (IS), a linear long-chain polymer of deep processing of sulfur (S), with a sulfur atom number of up to 108 on the molecular chain; viscoelasticity and molecular weight distribution of high polymers; insoluble in carbon disulfide Therefore, it is called insoluble sulfur. Insoluble sulfur (IS) is mainly used in rubber products, and has the following advantages compared with ordinary sulfur:
1. The rubber does not bloom during the storage period. Maintain uniform composition and performance; overcome the shortcomings of poor adhesion of rubber due to frosting; prevent contamination of products and molds and remove the coating process to overcome frosting, and provide conditions for production linkage .
2. There is no migration in the adjacent glue layer. Especially in the rubber of butyl butadiene rubber and butyl rubber, the migration rate of ordinary sulfur is high, and it can be avoided after adding insoluble sulfur.
3. Reduce scorching during mixing and storage.
4. Reduce the curing time. When the vulcanization temperature is reached, it has an "activation phase", that is, chain depolymerization, which accelerates the vulcanization rate and reduces the amount of sulfur, which is beneficial to the improvement of the aging property of the product.
5. Conducive to the adhesion of rubber to other materials.
6. An indispensable additive in radial tires. In the production of radial tires, it can effectively avoid blooming, and it is not easy to produce early vulcanization, and the rubber material maintains good viscosity, which is beneficial to the molding operation, and ensures the uniformity of vulcanization of vulcanized rubber to ensure stable product quality.