Chloroprene rubber (CR). General-purpose types. Evaluation procedure

Chloroprene rubber (CR). General-purpose types. Evaluation procedure

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1   Scope

This International Standard specifies, for general-purpose chloroprene rubbers (CRs):
  • — physical and chemical tests on raw rubbers;
  • — standard materials, standard test formulations, equipment and processing methods for evaluating the vulcanization characteristics.
General-purpose chloroprene rubbers fall into three broad classes based on the type of polymerization modifier used in their preparation:
  1. a) sulfur-modified types;
  2. b) mercaptan-modified types;
  3. c) types modified by other products.
For class c), the procedure for either a) or b) may be followed.