ISO 11236:2017 ゴム配合成分— p-フェニレンジアミン劣化防止剤（PPD）—試験方法 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 3, Raw materials (including latex) for use in the rubber industry.

This second edition cancels and replaces the first edition (ISO 11236:2000), which has been technically revised. It also incorporates the Technical Corrigendum ISO 11236:2000/Cor.1:2006.

The main changes compared to the previous version are as follows:

• removal of DTPD (N,N′-ditolyl-p-phenylenediamine), which is widely acknowledged to be hazardous to health and environment;
• transfer in an informative Annex A of the precision and bias for the determination of purity by gas chromatography by procedure A, for the determination of ash and for the determination of volatile matter;
• addition of a Bibliography.

1 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:

• determination of purity by gas chromatography (GC);
• determination of purity by high-performance liquid chromatography (HPLC);
• determination of ash;
• determination of volatile matter.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography