Hydroxybenzophenone stabilizer composition

Details Hydroxybenzophenone stabilizer composition Hydroxybenzophenone stabilizer composition

1978-03-31

1979-09-25

Hoke, Veronica P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252404, 260591, C08K 513

Patent

active

041690893

ABSTRACT:
Synthetic resins processed at temperatures in excess of 200.degree. C. are protected against deterioration on exposure to light of wave length shorter than 400 nanometers by compounding with a stabilizer composition comprising (A) 40 to 90 parts by weight of at least one 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group, (B) 5 to 30 parts by weight of at least one 3,5'-methylenedi(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group, (C) 5 to 40 parts by weight of at least one 3,3'-methylenebis(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group. Synthetic resins suitably stabilized with compositions of the invention include thermoplastic polyesters such as polyhydric phenol carbonate polyesters and alkanediol terephthalate polyesters, as well as high melting polyolefins such as poly-4-methylpentene and polypropylene.

REFERENCES:
patent: 3399237 (1968-08-01), Dressler et al.
patent: 3649695 (1972-03-01), Millionis

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