Epoxy resin composition and process therefor
AssigneeThe Dow Chemical Company
InventorsBen W. Heinmeyer, Pong S. Sheih, David S. Wang
Life of this patent
Estimating the term…
Abstract
Advanced resin compositions are prepared from a compound having an average of more than one vicinal epoxide group per molecule and an epoxide equivalent weight of from about 170 to about 200 and a compound having an average of more than one aromatic hydroxyl group per molecule wherein the resultant advanced resin has an epoxide or aromatic hydroxyl equivalent weight of from about 200 to about 50,000.
Claims37
An advanced resin composition prepared from a compound having an average of more than one vicinal epoxide group per molecule and an epoxide equivalent weight of from about 170 to about 200 and a compound having an average of more than one aromatic hydroxyl group per molecule wherein the resultant advanced resin has an epoxide or aromatic hydroxyl equivalent weight of from about 200 to about 50,000 and a weight average molecular weight of from about 400 to about 200,000;
- said advanced epoxy resin composition containing from about 0.01 to about 3 percent by weight of an organic solvent based on the combined weight of advanced epoxy resin and organic solvent.
A process for preparing an advanced resin composition containing an organic solvent which process comprises
- (I) continuously feeding to an extruder operating at a temperature and pressure sufficient to cause a reaction between components (A) and (B) and for a time sufficient to produce the desired product, the following components either separately or in admixture in any combination
- (A) at least one compound having an average of more than one but not more than about two vicinal epoxide groups per molecule and having an epoxide equivalent weight of from about 170 to about 200;
- (B) at least one compound having an average of more than one but not more than about two aromatic hydroxyl groups per molecule;
- (C) a catalytic quantity of at least one catalyst for promoting the reaction between components (A) and (B);
- and
- (D) at least one organic solvent;
- and
- (II) thereafter forming the thus formed resinous material exiting from the extruder to the desired physical form by any suitable means;
- and wherein
- (a) components (A) and (B) are employed in quantities such that the resultant advanced resin has an epoxide equivalent weight of from about 200 to about 50,000 and a weight average molecular weight of from about 400 to about 200,000;
- and
- (b) component (D) is employed in an amount such that the resultant product contains from about 0.01 to percent by weight based upon the combined weight of components (A), (B), (C) and (D).
Dependencies are inferred from the claim text.