Rigid polyurethane foams

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C - Chemistry, Metallurgy

08

K

C08K 7/28 (2006.01) C08G 18/12 (2006.01) C08G 18/40 (2006.01) C08G 18/42 (2006.01) C08G 18/48 (2006.01) C08G 18/63 (2006.01) C08G 18/76 (2006.01) C08J 9/32 (2006.01)

Patent

CA 2401012

Polyurethane foams containing a syntactic phase and a cellular, non-syntactic phase are useful as reinforcing foams, such as in automative applications. The foams are conveniently made in the reaction of a high viscosity isocyanate- reactive component and a high-viscosity polyisocyanate component, at least one of which contains a plurality of hollow microspheres.

L'invention concerne des mousses de polyuréthanne contenant une phase syntactique et une phase cellulaire non syntactique, qui sont utiles comme mousses de renfort, p. ex. dans l'industrie automobile. On fabrique ces mousses de manière appropriée en mettant à réagir un constituant très visqueux réagissant aux isocyanates et un constituant de polyisocyanate très visqueux, au moins un de ces constituants contenant une pluralité de microsphères creuses.

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