POLYMERIC COMPOSITION Russian patent published in 1999 - IPC

FIELD: chemistry of polymers. SUBSTANCE: polymeric composition comprises polyethylene and 4-alkoxy-2-hydroxybenzophenone as light stabilizer, composition comprises lower-pressure polyethylene or mixture thereof with high-pressure polyethylene at 24: 1 ratio, 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid and pentaerythritol ester and tris (2,4-di-tert- butylphenyl)phosphite as thermostabilizers, and calcium salt such as 1-(3-sulfophenyl)-3-methyl-4-azo-(3,4- dichloro-6-sulfophenyl)pyrazone-5 as light stabilizer, ratio of components being as follows, wt %: low-pressure polyethylene or mixture thereof with high-pressure polyethylene at 24:1 ratio, 98.55-99.57; 4-alkoxy-2- hydroxybenzophenone, 0.125-0.75; 3,5-di-tert-butyl-4- hydroxychenylpropionic acid ester and pentaerythrite ether, 0.09-0.1; tris (2,4-di-tert-butylphenyl)phosphite, 0.09-0.1; calcium salt, such as 1-(3-sulfophenyl)-3- methyl-4-azo-(3,4-dichloro-6-sulfophenyl)pyrazone-5-, 0.121-0.75. EFFECT: improved resistance of composition to light aging. 6 ex, 1 tbl