Patent ID: 6355701
Filing Date: 2002-03-12
Classification: B29C,B32B,C08G,Y10T

Abstract:
A process for manufacturing an insulation board comprising a rigid polyisocyanurate foam having two major surfaces and a facing material on at least one of the major surfaces, the method comprising:(a) conveying a facing material along a production line for attachment to one major surface of the foam; (b) applying a foam-forming mixture of polyisocyanurate to the facing material in a manner comprising spreading the mixture with a spreading means in the direction of the width of the facing material; (c) optionally conveying a second facing material along the production line for attachment to the other major surface of the foam; (d) conveying the facing material with applied foam-forming mixture into a restrained rise laminator which comprises a gap for foam expansion and allowing the mixture to foam and expand to fill the gap within the laminator; and (e) curing the foam, with a catalyst system comprising a polyol.