Rubber additives are generally divided into six categories.
The first category is vulcanization system additives, mainly vulcanizing agents, accelerators and activators
Vulcanizing agents include: ① sulfur, selenium, tellurium; ② sulfur-containing compounds; ③ organic peroxy compounds; ④ quinone compounds; ⑤ amine compounds; ⑥ resins; ⑦ metal oxides; ⑧ other vulcanizing agents.
Accelerators include: ① dithiocarbamates; ② xanthates; ③ thiurams; ④ thiazoles; ⑥ sulfenamides; amidines and aldol condensates; guanidines; thioureas.
Activators include: ① zinc oxide; ② magnesium oxide; ③ stearic acid and the like.

The second category is protective system additives, mainly antioxidants and flame retardants. Antioxidants mainly include amines, phenols, heterocyclics, phosphites, protective waxes, etc.
Amines include: ① naphthylamine; quinoline; ③ diphenylamine; ④ p-phenylenediamine.
Phenols include: ① hydrocarbonated mononuclear phenol; ② hydrocarbonated dinuclear phenol; ③ hydrocarbonated polynuclear phenol.
There are also heterocyclics and phosphites.
Protective waxes include: microcrystalline wax, floor wax and white wax.
Flame retardants include: ① bromine-based; ② chlorine-based; ③ phosphorus-based; ④ inorganic substances.

The third category is operating system additives, which mainly include plasticizers (softeners), dispersants, homogenizers, tackifiers, mold release agents and anti-scorch agents.

The fourth category is additives for reinforcing filling systems, mainly including carbon black, white carbon black, inorganic reinforcing agents and fillers, and organic reinforcing agents and fillers.

The fifth category is adhesive system additives, which mainly include m-methyl-white system, cobalt salt adhesion promoter, triazine adhesive, impregnated adhesive and adhesive.

The sixth category is other additives, such as foaming agents, defoaming agents, colorants, fragrances, antifog agents, termite agents, lubricants, release agents, release pad treatment agents, product surface modifiers and molds. Cleaning agent, etc.