Modified rigid, foamable urethane composition and method

Details Modified rigid, foamable urethane composition and method Modified rigid, foamable urethane composition and method

1997-10-03

2000-09-05

Sergent, Rabon

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

2521822, 25218222, 521118, 521130, 521137, 521155, 521159, 521160, 521164, 521170, 521172, 521173, 521174, 521175, 521176, 528 75, 528 76, 528 77, 528 80, 528 83, 528 59, 528 66, C08J 904, C08J 908, C08G 1810, C08G 1867

Patent

active

061144029

ABSTRACT:
A polyurethane composition to provide a rigid polyurethane foam suitable for use as a core material in a composite laminate and which polyurethane composition includes an additive compound or oligomer-prepolymer having hydroxy groups for reaction with the diisocyanate of the polyurethane or which has been prereacted with a diisocyanate and which contains after the polyurethane reaction ethylenically unsaturated groups, like allyl or acrylic groups, to react with an unsaturated polyester resin. The invention includes the organic additive oligomer-prepolymer and the hybrid polyester-rigid polyurethane laminates.

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