1 Scope
This International Standard specifies, for general-purpose chloroprene rubbers (CRs):
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— physical and chemical tests on raw rubbers;
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— 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:
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a) sulfur-modified types;
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b) mercaptan-modified types;
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c) types modified by other products.
For class c), the procedure for either a) or b) may be followed.