Home / Standards / GB/T 20646-2006 GB/T 20646-2006 Active Rubber compounding ingredients - p-Phenylenediamine(PPD) antioxidants - Test methods 橡胶配合剂 对苯二胺（PPD)防老剂试验方法 Standard Type GBT ICS 83.040.20 CCS G70 Status 现行 Issue Date 2006-09-01 Implementation 2007-02-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A