POLYMERIC COMPOSITION Russian patent published in 1994 - IPC

FIELD: film production. SUBSTANCE: composition has, %: plasticizer 24-31; phenolic antioxidant: ester of 3,5-di-tert.- butyl-4-hydroxyphenylpropionic acid and pentaerythritol 0.05-0.30; phosphorus-containing stabilizer - phenyl ester of 2,2-methylene-bis- (4-methyl-6-tert. -butylphenyl)phosphorous acid 0.05-0.30; addition - calcium stearate or hydroxymethyltetrasiloxane, or stilbene 0.1-1.0; 2.2′-hydroxy-5′-methylphenyl)-benzotriazole 0.1-0.3, and polyvinylbutiral - the rest. In preliminary prepared mixture of polyvinylbutyral and plasticizer other components are added. Films are pressed by mixture heating in the inert atmosphere. EFFECT: enhanced quality of composition. 1 tbl