ABRASIVE-POLYMERIC COMPOSITION FOR POROUS POLISHING-GRINDING TOOL Russian patent published in 1996 - IPC

FIELD: production of flexible abrasive tools used for surface finishing treatment of complex shape pieces and large-scale pieces. SUBSTANCE: composition has: binder - carboxylated divinyl and divinylnitrile rubbers; hardeners - ЕД-20 type epoxydian resin, bivalent metal oxide, tetramethylthiuramdisulfide (thiuram D); gas foaming agent -azoisobutylonitrile; surface active substance - block copolymer of polyorganosiloxane; components are in following ratio (mass %): abrasive filler 75.0 - 85.0; carboxylated rubber 11.6 - 19.6; В-20 epoxydiane resin 2.8 - 4.8; bivalent metals oxides 0.2 - 0.8; tetramethylthiuramsulfide (thiuram D) 0.1 - 0.2; azoisobutylonitrile 0.1 - 0.2; block copolymer of polyorganosilxane and polyoxialkylene 0.1 - 0.2. EFFECT: improved quality of flexible abrasive tool. 1 tbl