Polyhydric phenol coester stabilizers

Details Polyhydric phenol coester stabilizers Polyhydric phenol coester stabilizers

1979-05-29

1980-11-11

Pertilla, Theodore E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

260 9, 260 16, 260 457R, 260 457PH, 260 4575T, 260 4575N, 260 4575R, 260 4575W, 260 458A, 260 4585H, 260 4585P, 260 4585S, 525 58, 525400, 525439, C08L 6900, C08L 6702, C08L 2706

Patent

active

042334144

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 (1971-01-01), Schnell
patent: 4032510 (1977-06-01), Flood et al.

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