Patent ID: 9464153
Filing Date: 2016-10-11
CPC Classification: C08G,C08J,C08K

Claim Text:
1. A method for preparing a heat-expandable and heat-curable epoxy-based material, wherein a component A and a component B are mixed together at a temperature in the range from 20 to 100° C., the mixture is introduced into a mold and is allowed to pre-cure in the mold at a temperature in the range from 20 to 100° C. to form a material that is dimensionally stable up to 40° C., wherein component A contains at least one isocyanate and component B contains at least one diol or polyol selected from the group consisting of aliphatic diols, polyether polyols, polyester polyols and combinations thereof, at least one of components A or B contains at least one epoxy prepolymer, at least one of components A or B contains a heat-activatable hardener for epoxy prepolymers, and at least one of components A and B contains a heat-activatable blowing agent, and wherein the constituents of each of component A and component B are chosen such that component A and component B each have a viscosity such that each of component A and component B is pumpable at a temperature of at most 100° C.