Decorative molded foams with good impact resistance and fire...

Details Decorative molded foams with good impact resistance and fire... Decorative molded foams with good impact resistance and fire...

C - Chemistry, Metallurgy

08

J

C08J 9/22 (2006.01) C08G 18/34 (2006.01) C08G 18/48 (2006.01) C08G 18/76 (2006.01) C08J 9/04 (2006.01) C08J 9/228 (2006.01) C08K 3/10 (2006.01) C08K 3/38 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2734946

This invention relates to fire-resistant, flexible, molded, medium density polyurethane foams. These foams typical-ly have a density of from 10 to 30 pcf. The foams are the reaction product of a) at least one polyester polyol, b) at least one highly branched polyether polyol, c) at least one chain extender, d) a polymethylene poly(phenyl isocyanate), an isocyanate group con-taining prepolymer based on a polymethylene poly(phenyl isocyanate), or mixtures thereof, e) a solid flame retardant and f) water. This invention also relates to a process for preparing these polyurethane foams in open molds.

La présente invention concerne des mousses de polyuréthanne moyenne densité, moulées, souples et ignifuges. Ces mousses présentent, généralement, une densité comprise entre 10 et 30 pcf. Les mousses décrites dans cette invention sont le produit de réaction a) d'au moins un polyol de polyester, b) d'au moins un polyol de polyéther hautement ramifié, c) d'au moins un allongeur de chaîne, d) d'un poly(phénylisocyanate) de polyméthylène, d'un prépolymère contenant un groupe isocyanate basé sur poly(phénylisocyanate) de polyméthylène, ou des mélanges de ceux-ci, e) d'un ignifuge solide et f) d'eau. La présente invention concerne également un procédé permettant de préparer ces mousses de polyuréthanne dans des moules ouverts.

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