Liquid modified epoxy resins
AssigneeWestinghouse Electric Corp.
InventorsLeonard E. Edelman, Robert H. Runk
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Abstract
Liquid modified epoxy resins are prepared by reacting a drying oil with a diepoxide in the presence of a metal chelate catalyst. The drying oil may be modified by reacting it with maleic acid, maleic anhydride, or fumaric acid to increase the drying rate. The catalyst may be modified by mixing or reacting it with a borate.
Claims22
A method of making a liquid modified epoxy resin comprising reacting under non-hydrolyzing conditions to the clear pill stage about 20 to about 80% by weight of at least one liquid diglycidyl ether of a diphenol with about 20 to about 80% by weight of at least one non-hydroxylated drying oil in the presence of about 0.1 to about 1.5% by weight (based on the diglycidyl ether and the drying oil) of at least one catalyst having the formula ##STR5## where M is titanium, aluminum, or silicon, R.sub.1 is ethylene, propylene, or isopropylene, R is aliphatic or cycloaliphatic having 1 to 6 carbon atoms or ##STR6## where R.sub.2 is hydrogen or alkyl to C.sub.4, and said diglycidyl ether of a diphenol has the formula ##STR7## where R' is a diphenol radical selected from the group consisting of ##STR8## where R" is selected from the group consisting of ##STR9## n is an average of less than 1.
Dependencies are inferred from the claim text.