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:
a) sulfur-modified types;
b) mercaptan-modified types;
c) types modified by other products.
NOTE For class c), the procedure for either a) or b) may be followed.