HIGH RESILIENT FLEXIBLE URETHANE FOAM AND FLEXIBLE MOLDED FOAMS BASED ON ALLOPHANATE MODIFIED ISOCYANATES

摘要

This invention relates to a process for the preparation of a flexible foam. This process comprising reacting a liquid, storage stable, allophanate- modified polyisocyanate having an NCO group content of about 20 to about 42 %, with an isocyanate-reactive component, in the presence of a blowing agent an d at least one catalyst,wherein the relative amounts of the polyisocyanate and the isocyanate-reactive component are such that the NCO index is from about 70 to about 130.