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US 4,358,577 AGranted
Method for preparing high molecular weight epoxy resins containing hydrolyzed epoxy groups
AssigneeThe Dow Chemical Company
InventorsAvis L. McCrary, Michael G. Stevens
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Abstract
High molecular weight epoxy resins containing hydrolyzed epoxy groups are prepared by reacting (A) a low molecular weight epoxy resin, and (B) a hydroxyl-containing compound in the presence of (C) a catalyst therefor and (D) an excess quantity of water and thereafter removing the excess water.
Claims6
A process for preparing high molecular weight epoxy resin compositions containing one or more hydrolyzed glycidyl groups which process comprises:
- (1) reacting in the absence of an inert organic solvent, a reaction mixture consisting essentially of
- (A) at least one low molecular weight epoxy resin having an average of more than one glycidyl group per molecule with
- (B) at least one hydroxyl-containing compound reactive with a glycidyl group;
- said reaction being conducted in the presence of
- (C) a catalytic quantity of a catalyst for effecting the reaction between (A) and (B) and
- (D) water in an amount in excess of that amount theoretically required to totally hydrolyze all of the epoxy groups of the epoxy resin produced from the reaction between (A) and (B);
- and
- (2) removing the excess water thereby providing a high molecular weight epoxy resin containing at least one hydrolyzed glycidyl group.
5 more elements
Dependencies are inferred from the claim text.