Dithiocarbamate Accelerators

Dithiocarbamate Accelerators

Dithiocarbamates are ultra fast accelerators that have virtually no induction time. When they are used as primary accelerators, retarders are commonly added to avoid scorch.

They will also require initators for activation such as zinc oxide / fatty acid. 

A number of zinc dialkyl dithiocarbamates are commercially available, with the most common ones being

  • dimethyl- (ZDMC)
  • diethyl- (ZDEC)
  • dibutyl- (ZDBC)

The scorch safety of these compounds increases with increasing length of the alkyl group: ZDMC < ZDEC < ZDBC and all three have similar high reactivity. 
Dithiocarbamates are often a good choice for low sulfur cure and low temperature cure and white/transparent or brightly colored rubber goods and as secondary accelerators to speed up cure.

Product Name

Chemical Name

CAS Number

Application

Anchor SDBC

Sodium Dibutyl Dithiocarbamate

136-130-1

Ultra fast accelerator used in combination with thiurams, thiazoles and guanidines in the vulcanisation of NR and SBR latices

Anchor SDEC

Sodium Diethyl Dithiocarbamate

148-18-5

Ultra fast accelerator used in combination with thiurams, thiazoles and guanidines in the vulcanisation of NR and SBR latices

Anchor ZBEC

Zinc Dibenzyl Dithiocarbamate

14726-36-4

Ultra fast accelerator for NR and SBR latices

Anchor ZDBC

Zinc Dibutyl Dithiocarbamate

136-23-2

Ultra fast accelerator for NR and SBR latices. Also used as antioxidant in rubber adhesive systems

Anchor ZDEC

Zinc Diethyl Dithiocarbamate

14324-55-1

Ultra fast accelerator for NR and SBR latices. Also used as antioxidant in rubber adhesive systems

Anchor ZDMC

Zinc Dimethyl Dithiocarbamate

137-30-4

Ultra fast accelerator for NR and SBR latices

Thiazoles

Thiazoles are some of the most widely used primary vulcanization accelerators due to the fact they have improved scorch safety and allow for cure at very high temperatures with short curing time and broad vulcanization plateau.

Because of their versatility, they will often be used for a wide variety of rubber products. To increase their cure speed, they are often combined with small amounts of basic accelerators such as diphenyl guanidine (DPG) or diorthotolyl guanidine (DOTG).

All of these accelerators are also known for their good scorch delay.

Product Name

Chemical Name

CAS Number

Application

Anchor ZMBT-1

Zinc 2-Mercaptobenzothiazole

155-04–4

Semi ultra fast accelerator for NR and SBR latices

Anchor ZMBT-15

Zinc 2-Mercaptobenzothiazole

155-04–4

Semi ultra fast accelerator for NR and SBR latices

For more information on how we can help supply these Accelerators, email the team