Process for stabilizing polyester compositions
AssigneeShell Oil Company
InventorRoy J. Jackson
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Abstract
The present invention provides an improved process for reducing the premature gelation during esterification of epoxy compounds containing tertiary, allylic or benzylic hydrogens (e.g., saturated epoxy resins) with ethylenically unsaturated monocarboxylic acids (e.g., acrylic acid) wherein the epoxy compound in pre-reacted with a trialkylphosphite (e.g., triethylphosphite) prior to the esterification.
Claims13
A process for reducing the premature gelation of unsaturated polyesters prepared by esterifying an epoxy compound containing tertiary, allylic or benzylic hydrogens with an ethylenically unsaturated monocarboxylic acid which comprises pre-reacting the epoxy compound with a trialkylphosphite prior to the esterification step.
Dependencies are inferred from the claim text.