Polyhydric phenol coester stabilizers
AssigneeArgus Chemical Corporation
InventorsWilliam E. Leistner, Motonobu Minagawa, Yutaka Nakahara, Tohru Haruna
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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.
Claims16
A stabilized synthetic resin composition comprising a synthetic resin and 0.01 to 5% by weight of the resin of a coester, having a molecular weight between 700 and about 10,000 measured by a vapor pressure method, of at least one polyhydric phenol, 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 not more than one thioether sulfur atom, in which the molar proportions of carbonic acid to aliphatic dicarboxylic acid range from 19:1 to 1:19.
Dependencies are inferred from the claim text.