Rubber compounding ingredients. <i>p</i>-Phenylenediamine antidegradants (PPDs). Test methods1 Scope This document applies to a variety of substituted p phenylenediamine antidegradants (PPDs) used in the rubber industry. The three general classes of PPDs are dialkyl, alkyl aryl and diaryl, which are used to impart ozone resistance to rubber. The following test methods are of greatest significance in assessing the purity of production PPDs, and hence their suitability for use in rubber. They are specified in this document as follows:

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The requirements of this part of ISO 4190 are intended to be followed in all cases where the controls and the basic signals are concerned

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BS 5440-2:2009 Flueing and ventilation for gas appliances of rated input not exceeding 70 kW net (1st

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Section 9: Management

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BS EN 3745-515 also provides you with the final measurements and requirements for the method used for measuring buffer insertion force

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