POLYMERIC COMPOSITION Russian patent published in 1994 - IPC

FIELD: film production. SUBSTANCE: composition has, %: plasticizer 24-31; phenolic antioxidant - methyl ester of 3,5-di- tert.-butyl-4-hydroxyphenylpropionic acid, ester of 3,5-di-tert.-butyl-4- hydroxyphenylpropionic acid and pentaerythritol, ester of 3,5-di-tert.- butyl-4-hydroxyphenylpropinic acid and diethylene glycol 0.1-0.4; phenyl ester of 2,2-methylene-bis-(4-methyl-5-tert. -butylphenyl)-phosphorous acid 0.05-0.30; 2-(2′-hydroxy-5′-methylphenyl)-benzotriazole 0.1-0.3, and polyvinylbutyral - the rest. Polyvinylbutyral is mixed with plasticizer and other components are added, and mixture is stirred thoroughly. Film is pressed at mixture heating in inert medium. EFFECT: enhanced quality of composition. 1 tbl