NF ISO 1407, T46-100 (06/2023)

This document specifies four methods for the quantitative determination of materials extractable from raw, natural and synthetic rubbers; two of the methods are equally applicable to blends of vulcanized and unvulcanized rubbers. Method A measures the mass of the solvent extract, after evaporation of the solvent, relative to the mass of the initial test portion. Method B measures the difference in mass of the test portion before and after extraction. Method C, which only concerns raw rubbers, measures the difference in mass of the test portion before and after extraction with a boiling solvent. Method D, which only concerns raw rubbers, measures the difference in mass of the test portion before and after extraction compared to the initial mass of the test portion. NOTE 1 Depending on the test method used, the packaging of the test portion and the solvent used, the test result is not necessarily the same. NOTE 2 Method C generally gives lower results than those obtained with methods A and B due to a balance which is created, in particular if large test portions are used, depending on the content and the nature of the extractable material. Method C is, however, faster than Method A or Method B. NOTE 3 Methods C and D are not suitable if the test Portion disintegrates during extraction. NOTE 4 Method D is normally used for production controls. Recommendations on the most suitable solvent for each type of rubber are given in Annex A.
(Automatic translation from French)