If rubber vulcanization accelerators are divided into major categories, there are two major categories:

1. Classification by acidity and alkalinity

Acidic accelerators: thiazole, thiolan Mu, dithiocarbamates, xanthates.

Alkaline accelerators: guanidines and aldehydesamines.

Neutral accelerators: hypoxanthamides and thioureas.

2. Classification by vulcanization speed

Super-speed grade: dithiocarbamates, xanthates

Super-speed grade: thiuram

Quasi-speed level: thiazole, hypoxanthamides

Medium speed level: guanidines

Slow speed level: aldehydesamines, thioureas

According to their properties and chemical composition, they can be divided into two categories: inorganic accelerators and organic accelerators. ?

Inorganic accelerators were used earliest, but due to their small accelerating effect and poor performance of vulcanized rubber, they have been replaced by organic accelerators in most cases except for those that are still used in small amounts in other situations.

Organic accelerators have a large promotion effect, good vulcanization characteristics, and vulcanized rubber has excellent physical and mechanical properties, so it develops rapidly. ?

With the continuous development of the types and uses of synthetic rubber, the list of existing accelerators has become increasingly complex, but currently there are only dozens of the most commonly used ones.