Methods and compositions for preparing rigid foams with...

Details Methods and compositions for preparing rigid foams with... Methods and compositions for preparing rigid foams with...

C - Chemistry, Metallurgy

08

G

C08G 18/42 (2006.01) C08G 18/16 (2006.01) C08G 18/18 (2006.01) C08G 18/22 (2006.01) C08G 18/48 (2006.01) C08J 9/14 (2006.01)

Patent

CA 2189531

Disclosed are methods and compositions for preparing rigid foams by contacting a polyisocyanate with a polyol mixture comprising (a) from about 40-95 % by weight of a polyester or polyether polyol; (b) a catalytic amount of a catalyst system comprising a primary catalyst and an amino acid salt catalyst derived from sarcosine; and (c) a non-chlorofluorocarbon blowing agent.

Procédés et compositions utilisés pour préparer des mousses dures. Ces procédés consistent à mettre un polyisocyanate en contact avec un mélange à base de polyol comprenant: (a) entre environ 40 à 95 % en poids d'un polyol de polyester ou de polyéther; (b) une quantité catalytique d'un système de catalyseur formé d'un premier catalyseur et d'un catalyseur de sel d'acide aminé dérivé de la sarcosine; et (c) un gonflant non chlorofluorocarboné.

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