Polyhydric phenol coester stabilizers

Details Polyhydric phenol coester stabilizers Polyhydric phenol coester stabilizers

1976-11-09

1979-11-13

Pertilla, Theodore E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252400R, 252401, 252404, 252406, 252407, 260 457R, 260 457S, 260 4585P, 260 4585S, 260463, 528196, C08G 6362, C08J 320, C08L 6900

Patent

active

041742974

ABSTRACT:
New polyhydric phenol coesters are disclosed of polyhydric phenols, having 2 to 3 phenolic hydroxyl groups and 1 to 3 benzenoid rings, with carbonic acid and an aliphatic dicarboxylic acid having 4 to 10 carbon atoms and optionally a thioether sulfur atom in the aliphatic chain of the dicarboxylic acid. The new coesters have molecular weights from 700 to about 10,000, preferably from 1200 to 7000, and are highly effective stabilizers for a variety of synthetic resins.
Stabilizer compositions comprising a polyhydric phenol coester and a known polymer stabilizer, as well as synthetic resins stabilized with such stabilizer compositions, are also disclosed.

REFERENCES:
patent: 3030331 (1962-04-01), Goldberg
patent: 3030335 (1962-04-01), Goldberg
patent: 3169121 (1965-02-01), Goldberg
patent: 3553167 (1971-01-01), Schnell
patent: 4032510 (1977-06-01), Flood et al.

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