Patent ID: 6562880
Filing Date: 2003-05-13
Classification: C08G,C08J

Abstract:
A process for the production of rigid polyurethane foams or polyisocyanurate foam comprising reacting:a) an organic diisocyanate and/or polyisocyanate with b) from about 10 to 70% by weight based on the weight of the total foam-forming mixture of an amine-initiated polyol having a molecular weight of at least 149 and a functionality of at least three in the presence of c) up to 5%, based on the total weight of the foam-forming reaction mixture of added carbon dioxide and water in an amount less than 5%, based on the total weight of the foam-forming reaction mixture, and d) up to 20%, based on the total weight of the foam-forming reaction mixture of a C3 to C5 fluorinated hydrocarbon.