Amine catalyst to improve the stability of polyurethane systems having expansion agents containing halogen

摘要

Abstract invention patent: "amine catalyst to improve the stability of polyurethane systems having a blowing agent containing halogen. The present invention relates to compositions of catalyst useful in the production of insulating foam polyurethane or poly isocyanurate.The compositions of catalyst give stability increased from a mixture of catalyst, a blowing agent containing halogen and a polyol. These compositions of catalyst comprise at least 10% of a tetra - alquilguanidina and at least 10% of a catalyst of tertiary amine with an isocyanate reactive group.These catalysts improved can be used with any halogenated blowing agent, and provides substantial benefits to stability with the use of hidrofluoro - olefins and hidrofluorocloro - olefins.In an exemplary method, a process includes providing a premix comprising a blowing agent of hydro - Halo olefin having at least a polyol, water and a catalyst comprising 10 to 50% of tetrametilguanidina and 10 to 90% of one or more of the amine catalyst containing a group reactive Isocyanate.