Use of unsaturated liquid hydrocarbons, which are free of groups reactive with isocyanates, as cell openers in the production of hard foams having urethane groups and / or isocyanurate.

摘要

PROCESS FOR PRODUCING MATERIALS ESPUMOSOS HARDENED INTRODUCING URETHANE GROUPS AND / OR ISOCIANATUROS OF SIGNIFICANT Pores THROUGH THE TRANSFORMATION polyisocyanates with compounds AT LEAST TWO GROUPS REACTIVOS Opposed to isocyanates, WHOSE equivalent weight reactive groups UPGRADE MAYBE 9 to 800, presence of catalysts, surface-active substances, AND AGENTS OF iNITIATION OF PHYSICAL FOAM, protection means FLAME AND OTHER AUXILIARY MEANS AND KNOWN ACCESSORIES, SO THE tRANSFORMATION IS MADE IN THE PRESENCE OF HYDROCARBON FLUIDS HIGH MOLECULAR WEIGHT ARE FREE REACTIVOS ISOCIANTOS GROUP MEETING IN amounts of 0.01 to 3.0 wt% on the preparation of the reaction. PARTICULARLY HYDROCARBONS polyoctenylene Preferred polybutadiene IN A average molecular weight of 800 to 10,000 g / mol. HARDENED SPARKLING PRESENTS THE MATTER BECAUSE porosity, high stability deformed.