Patent ID: 9475904
Filing Date: 2016-10-25
CPC Classification: C08G,C08J

Claim Text:
1. A heat-curable epoxy resin composition, comprising: (a) at least one solid epoxy resin A1 having an average of more than one epoxide group per molecule; (b) at least one hardener B for epoxy resins which is activated by elevated temperature; (c) at least one carboxylic acid C; (d) at least one hydroxyalkylamide or hydroxyalkylurea H; and (e) optionally at least one liquid epoxy resin A2 with an average of more than one epoxide group per molecule, wherein the heat-curable epoxy resin composition further comprises at least one accelerator E based on a urea derivative for activating a reaction of components A1, and optionally A2, with B, and wherein a proportion of the accelerator E is selected such that an onset temperature of a reaction of the hydroxyalkylamide or hydroxyalkylurea H with the carboxylic acid C, measured by DSC, is at least 20° C. higher than an onset temperature of the reaction between the solid epoxy resin A1, optionally liquid epoxy resin A2 and hardener B.