PROCESS FOR THE PRODUCTION OF FLEXIBLE FOAMS CONTAINING URETHANE GROUPS

摘要

PROCESS FOR THE PRODUCTION OF FLEXIBLE FOAMS CONTAINING URETHANE GROUPS Flexible foams containing urethane groups are produced by reacting a reaction mixture comprising: 1) modified polyisocyanates, 2) compounds having molecular weights of 400 to 10,000 and containing at least two isocyanate-reactive hydrogen atoms, and 3) water and/or organic blowing agents. The modified polyisocyanates are prepared by reacting polyurethanes with polyisocyanates, in the presence of acylating and/or alkylating agents, It is also possible that the reaction mixture comprise: 4) compounds having molecular weights of 32 to 399 and containing at least two isocyanate-reactive hydrogen atoms as crosslinking agents.