Curable epoxy-vinyl ester compositions
AssigneeShell Oil Company
InventorsHarold E. De La Mare, Paul D. Jones
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Abstract
Partial vinyl-epoxy ester compositions are disclosed which can be cured by a dual path comprising exposure to UV radiation followed by a post thermal treatment. Simply, the partial esters contain from about 1 to 10 parts per hundred parts by weight of ester of a catalyst compound such as tertiary amines and imidazole compounds, salts and adducts thereof.
Claims6
A heat-curable, tack free composition exhibiting excellent shelf life consisting essentially of (1) a partial vinyl ester containing hydroxyl groups prepared by reacting from about 0.50 to about 0.85 chemical equivalents of an ethylenically unsaturated monocarboxylic acid with a chemical equivalent amount of an epoxy compound containing more than one vicinal-epoxy group and (2) a catalytic amount of an adduct of an imidazole compound and a glycidyl ether of 2,2-bis(4-hydroxyphenyl)propane, said blend being exposed to UV radiation in an amount to effect a tack-free, B-stage partial cure.
Dependencies are inferred from the claim text.