Stabilized polyester compositions
AssigneeShell Oil Company
InventorRoy J. Jackson, Jr.
Life of this patent
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Abstract
Stabilized polyester compositions comprise (1) an ethylenically unsaturated polyester prepared by esterifying a polyepoxide with an ethylenically unsaturated monocarboxylic acid (e.g., acrylic or methacrylic acid) in the presence of an organic phosphine catalyst (e.g., triphenylphosphine), (2) a primary or secondary amine (e.g., p,p'-dioctyldiphenylamine) and, optionally, (3) a compatible ethylenically unsaturated monomer (e.g., styrene).
Claims7
A stabilized composition comprising (1) an ethylenically unsaturated polyester prepared by first esterifying an epoxy compound selected from the group consisting of glycidyl novolac resins glycidyl polyethers of polyhydric phenols and glycidyl polyethers of hydrogenated polyhydric phenols with an ethylenically unsaturated monocarboxylic acid in the presence of an organic phosphine esterification catalyst and then reacting the resulting vinyl ester with a polycarboxylic acid anhydride and (2) a stabilizing amount of a secondary amine of the general formula ##STR11## wherein R.sub.1 and R.sub.2 are each alkyl radicals of up to 12 carbon atoms or hydrogen.
Dependencies are inferred from the claim text.