Production of flexible polyurethane foams

Details Production of flexible polyurethane foams Production of flexible polyurethane foams

C - Chemistry, Metallurgy

08

G

C08G 18/76 (2006.01) C08G 18/10 (2006.01) C08G 18/42 (2006.01) C08J 9/04 (2006.01) C08L 75/06 (2006.01)

Patent

CA 2242695

Flexible polyurethane foams are produced by reacting a) polyisocyanates with b) compounds containing at least two active hydrogen atoms in the presence of c) blowing agents d) catalysts and also e) auxiliaries and/or additives, wherein prepolymers containing isocyanate and urethane groups and derived from diphenylmethane diisocyanate and polyphenylpolymethylene polyisocyanates and polyether polyols are used as polyisocyanates a), polyester polyols are used as compounds b) containing at least two active hydrogen atoms, and compounds comprising silicon atoms and polyether chains are used as auxiliaries and/or additives e).

Divulgation d'un procédé de fabrication de mousses de polyuréthane consistant à faire réagir : a) des polyisocyanates avec des b) composés contenant au moins deux atomes d'hydrogène actifs en présence c) de gonflants, d) de catalyseurs et e) d'agents auxiliaires et/ou d'additifs. Des prépolymères contenant des groupements isocyanates et uréthanes et dérivés de diisocyanate de diphénylméthane et de polyisocyanates de polyphénylpolyméthylène, et des polyols de polyéther sont utilisés comme polyisocyanates a), les composés (b) contenant au moins deux atomes d'hydrogène actifs sont des polyols de polyester, et des composés comprenant des atomes de silicium et des chaînes de polyéther sont utilisés comme agents auxiliaires et/ou additifs e).

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