Home / Standards / GB/T 46228-2025 GB/T 46228-2025 Active Brominated isobutene-isoprene rubber(BIIR) 溴化异丁烯-异戊二烯橡胶(BIIR) Standard Type GBT ICS 83.060 CCS G35 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A