Sulphiding agent is light yellow in appearance and in the form of powder, its molecular weight is 268.2, and its highest melting point reaches more than 195 degrees Celsius. It has a wide range of functions, mainly divided into inorganic and organic categories, no matter what kind of function category, it is extremely harmful to the human body.

Vulcanising agent can make rubber molecular chain cross-linking reaction, so that the linear molecules to form a three-dimensional mesh structure, plasticity reduction, elastic strength increase of the substance. In addition to some thermoplastic rubber does not need vulcanisation, natural rubber and various synthetic rubber need to be matched with vulcanising agent for vulcanisation.

Inorganic and organic two categories.

The former category has sulfur yellow, sulfur chloride, selenium, tellurium and so on. After a class of sulfur-containing accelerator (such as accelerator TMTD), organic peroxides (such as benzoyl peroxide), quinone oxime compounds, polysulfide polymers, ethyl carbamate, maleimide derivatives and so on.

Rubber vulcanising agents include elemental sulphur, selenium, tellurium, sulphur-containing compounds, peroxides, quinone compounds, amine compounds, resin compounds, metal oxides and isocyanates. The most commonly used are elemental sulphur and sulphur-containing compounds.

Where in the rubber material can accelerate the speed of vulcanisation reaction, shorten the vulcanisation time, reduce the vulcanisation temperature, reduce the amount of vulcanising agent, and can enhance or improve the physical and mechanical properties of vulcanised rubber are collectively referred to as vulcanisation accelerator, or accelerator for short.

The rubber industry uses many varieties of accelerator, according to its chemical composition and nature can be divided into two categories, inorganic accelerator and organic accelerator. At present, in addition to individual cases, the general use of organic accelerators. Because of its promotion effect, good vulcanisation characteristics, the physical and mechanical properties of vulcanised rubber is excellent, rapid development, a wide range of types.