Page 238 - Handbook of Plastics Technologies

ELASTOMERS

4.30 CHAPTER 4

FIGURE 4.21 The chemistry of accelerator synthesis.

ators and reaction products formed between accelerators and sulfur. Accelerators are
classified and illustrated in Table 4.5.
Frequently, mixtures of accelerators are used. Typically, a benzothiazole type is used
with smaller amounts of a dithiocarbamate (thiuram) or an amine type. An effect of using
a mixture of two different types of accelerator can be that each activates the other and bet-
ter-than-expected cross-linking rates can be obtained. Mixing accelerators of the same
type gives intermediate or average results.

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