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Difference between alkali - free accelerators and

Source: http://www.heqichem.com/news/54.html   Release time: 2019-04-12

Accelerator accelerator 'promoter. And catalyst or fixing agent, and can improve the reaction rate of less dosage of a substance.
Mechanism and influence: vulcanization accelerator abbreviation accelerator. A substance that promotes vulcanization. Can shorten the vulcanization time of rubber or reduce the vulcanization temperature, reduce the dosage of vulcanization agent and improve the physical and mechanical properties of rubber. It can be divided into inorganic accelerator and organic accelerator. In inorganic accelerators, except zinc oxide, magnesium oxide, lead oxide and other small amount of use, the rest is mainly used as a promoter. 

Most are organic accelerators. There are many kinds. In the vulcanization accelerator some has the bitter taste (like vulcanization accelerator M), some causes the product to change color (like the vulcanization accelerator D), some has the vulcanization effect (like the vulcanization accelerator TT), some has the anti-aging function or the plasticization function (like the vulcanization accelerator M) and so on. Acting speed: according to the acting speed, it can be divided into slow speed, medium speed, medium overspeed, overspeed, overspeed and other accelerators. In addition, there are aftereffect accelerant. 

Mainly organic compounds containing nitrogen and sulfur, have aldehyde amine (e.g., vulcanization accelerator H) and guanidine (e.g., vulcanization accelerator D), thiuram class (such as vulcanization accelerator TT), thiazole class (such as vulcanization accelerator M), dithiocarbamate salts (such as vulcanization accelerator ZDMC), xanthate salt (such as vulcanization accelerator ZBX) and thiourea (such as vulcanization accelerator NA - 22), sulfonamide classes (such as vulcanization accelerator CZ). It is usually used alone or in combination according to the specific situation.

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