Ble 25 Reaction product of diphenylamine and acetone Crompton-Uniroyal Chemical Antioxidants >> Amine Chloroprene Rubber (CR) Rubber - Elastomer (Chloroprene, Butyl …) FDA STATUS: 177.2600 – Rubber Articles Intended for Repeated Use – Limitation – 5% Max. Nonblooming, high temperature reaction product of diphenylamine and acetone. Used as antioxidant and antiflex cracking agent for neoprene, nitrile rubbers, BR, SBR, their latices and EPDM. Can be added directly to solid rubber or in a dispersed form to latex. Offers negligible effect on cure rate. Provides dark brown discoloration in stocks exposed to light. Migrates during cure. Can be used as a stabilizer for emulsion SBR.