Patent ID: 8057727
Filing Date: 2011-11-15
Classification: C08G

Abstract:
1. A method of producing a skin-integrated laminate comprising a design surface of a non-foaming polyurethane resin, a semi-rigid polyurethane foam and a core material, which comprises the steps of: (1) applying a mold release agent on a core part and a cavity part of an article mold for the surface skin which forms the design surface; (2) optionally, applying a paint film on the cavity surface of an article mold; (3) closing the core part and the cavity part of the article mold; (4) reaction injection molding a mixture comprising (I) a polyol mixture, and (II) a polyisocyanate compound, wherein (I) said polyol mixture comprises: (1) a polyol, (2) from 2.0 to 7.0 parts by weight, based on 100 parts by weight of (I) the polyol mixture, of a chain extender, the chain extender being selected from the group consisting of 1-methyl-3,5-diethyl-2,4-diaminobenzene, 1-methyl-3,5-diethyl-2,6-diaminobenzene and mixtures thereof, (3) a catalysts, and (4) optionally, an auxiliary agent; (5) removing the molded article of a non-foaming polyurethane resin which forms the design surface skin; (6) placing the molded article of a non-foaming polyurethane resin from step (5) into a cavity part of a foaming mold, (7) installing the core material to a core part of the foaming mold, (8) pouring a semi-rigid polyurethane foam mixture onto the non-foaming polyurethane resin which was placed onto the cavity part of the foaming mold in the step (6), with an opened or closed system, and (9) removing the resultant integral molded article having a design surface skin.