Do you know the use and function of high efficiency desulfurization catalyst?

High efficiency desulfurization catalyst in natural rubber, together with sulfur yellow, can prevent vulcanization reversion, improve heat resistance, reduce heat generation, aging resistance, improve rubber and cord adhesion and vulcanization rubber modulus. It is used in the rubber of shoulder rubber and cushion layer of load tires, which can solve the problem of shoulder hollow of slant load tires, and also can be used in the large-size thick products of natural rubber and various rubber miscellaneous products.

For example, when used with sulfur yellow, accelerator MPMCZ or TMTD, vulcanizing diene rubber (natural rubber, butadiene rubber, butyl rubber, synthetic isoprene rubber) has the characteristics of prolonging scorching time, reducing heat generation, high tensile strength, excellent resistance to vulcanization reversion, etc. At the same time, it can also increase H extraction, suitable for high temperature vulcanization of rubber (183℃), the dosage is 2-3phr, suitable for large tires and thickened and enlarged products.

As the vulcanization accelerator of neoprene, it can obviously improve the anti-scorching performance of the blended rubber, and is suitable for processing neoprene in the high temperature season in the south.

As a high efficiency desulfurization catalyst and vulcanizing agent of peroxide vulcanization of many kinds of rubber, especially in the process of peroxide vulcanization of nitrile rubber, ethylene propylene rubber and rubber with body, it can play the role of low compression deformation, fast vulcanization speed and heat resistant air aging rubber.

For example, in NBR, when the dosage is 1.5phr, the permanent compression deformation is only 3-8%, which cannot be achieved by using other co-sulfurizing agents.

In neoprene rubber, chlorosulfonated polyethylene rubber, butadiene rubber, nitrile rubber, isoprene rubber, butyl rubber, bromobutyl rubber, acrylate rubber, silicone rubber and rubber-plastic and other special rubber, as an auxiliary vulcanizing agent, can significantly improve the performance of the association, improve heat resistance, suitable for high temperature vulcanization system, reduce the permanent deformation of compression is very obvious, but also to reduce the amount of peroxide, to prevent the scorching of the rubber in the process, improve the adhesive strength of the rubber and cord and metal.

Anti-coking agent

When used in chlorosulfonated polyethylene rubber, it can be used as anti-coking agent in combination with magnesium oxide, pentaerythritol and bis(penta methyl tetrasulfide) thiuram (TRA).

Improves compression deformation

Combined with calcium hydroxide and diphenyl ethylene diamine to form maleimide vulcanization system, the dosage is 2-4phr, which can greatly reduce the compression permanent deformation and improve the temperature resistance.

Improve bonding strength

Improve the bonding strength of rubber and polyamide fabric, rubber and metal, suitable for direct bonding system.

The role of efficient desulfurization catalyst is divided into two categories: inorganic and organic. The former category has sulfur yellow, sulfur monochloride, selenium, tellurium, etc. The latter category has sulfur-containing accelerators (such as accelerator TMTD), organic peroxides (such as benzoyl peroxide), quinone oxime compounds, polysulfide polymers, ethyl carbamate, maleimide derivatives, etc.

Rubber vulcanizing agents include elemental sulfur, selenium, tellurium, sulfur-containing compounds, peroxides, quinones, amines, resins, metal oxides, and isocyanates. The most commonly used are elemental sulfur and sulfur-containing compounds. Currently platinum vulcanizing agent (low vulcanization temperature, fast vulcanization speed) as a vulcanizing agent for silicone rubber in some special products are important applications