Patent ID: 8629201
Filing Date: 2014-01-14
Classification: C08G,C08J,C08L,Y10T

Abstract:
1. A composition for production of a prepreg for manufacture of thermoset composite laminates, the composition comprising: unsaturated polyesters or vinylesters, a catalyst comprising a polyurethane catalyst based on a bismuth compound, a thickening agent comprising an isocyanate, a crosslinking initiator, and a polyether polyol comprising tertiary amine groups, wherein a first component of the unsaturated polyesters or vinylesters comprises reactive groups that react with the thickening agent, and a second component of the unsaturated polyesters or vinylesters does not comprise any groups that react with the thickening agent, wherein a reaction between the first component of the unsaturated polyesters or vinylesters and the thickening agent is catalysed by the catalyst and the polyether polyol in a first reaction step; and wherein both the first component and the second component of the unsaturated polyesters or vinylesters and the crosslinking initiator participate in a curing reaction in a second reaction step.