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ISO 4645:2022

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Rubber and rubber products - Identification of antidegradants - Thin layer chromatographic methods

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This document describes two methods for identification of antidegradants (antioxidants, antiozonants and stabilizers) which can be present in raw rubber, unvulcanized compounded rubber, or rubber products, by thin layer chromatography.

Method A is a simplified method that provides for the identification of known materials and can be used to check the presence or absence of a particular antidegradant which is expected to be present.

Method B is a more detailed method that enables a greater degree of separation of the spots to be obtained and therefore can be used to detect and identify an unknown antidegradant.

Antidegradants to which these methods are applicable include phosphited polyalkyl phenols, substituted bisphenols, secondary amines, substituted cresols and substituted p-phenylenediamines. Examination for other types of antidegradants is possible under the same condition when there is a standard chromatogram.


SDO ISO: International Organization for Standardization
Document Number ISO 4645
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 45/SC 2
Publish Date Document Id Type View
Not Available ISO 4645:2022 Revision