Patent ID: 7572404
Filing Date: 2009-08-11
Classification: C08G

Abstract:
1. A method of producing a vehicle-interior, integral molded article comprising a skin-integrated laminate comprising: (i) a design surface skin of a non-foaming polyurethane resin and (ii) a core material, comprising the steps of: (1) installing a core material to a core part of an article mold, (2) applying a mold release agent on a cavity part surface of an article mold, (3) optionally, applying a paint film on the cavity part surface of an article mold, (4) closing the core part and the cavity part of an article mold, (5) reaction injection molding (I) a polyol mixture and (II) a polyisocyanate compound, thereby forming a reaction mixture of (I) said polyol mixture and (II) said polyisocyanate compound, wherein the reaction mixture has a gel time of 5.0 to 15.0 seconds, and 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 catalyst, and (4) optionally, an auxiliary agent, to create a non-foaming polyurethane resin having a surface hardness of 30 to 70 as measured by an Asker A hardness meter at a cure time of 30 to 100 seconds; and (6) removing the integral molded article.