Process for the preparation of low-density flexible...

Details Process for the preparation of low-density flexible... Process for the preparation of low-density flexible...

B - Operations, Transporting

29

C

18/668

B29C 35/02 (2006.01) C08G 18/08 (2006.01) C08G 18/48 (2006.01) C08J 9/02 (2006.01) C08J 9/04 (2006.01)

Patent

CA 2007587

A PROCESS FOR THE PREPARATION OF LOW-DENSITY FLEXIBLE POLYURETHANE FOAMS ABSTRACT OF THE DISCLOSURE The present invention relates to a process for the preparation of low-density flexible polyurethane foams comprising reacting, in a closed mold, a mixture comprising polyisocyanates; compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight in the range from about 400 to about 10,000; water as blowing agent; optionally, compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight in the range from 32 to 399 as chain-extending and crosslinking agents; and optionally, one or more known auxiliaries and additives, wherein said mixture is heated before foaming to a temperature of at least 40°C.

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