Process for the production of foam plastics based on...

Details Process for the production of foam plastics based on... Process for the production of foam plastics based on...

C - Chemistry, Metallurgy

08

G

18/654

C08G 18/10 (2006.01) B32B 5/20 (2006.01) C08J 9/34 (2006.01)

Patent

CA 1124024

Mo-1928 LeA 18,692 PROCESS FOR THE PRODUCTION OF FOAM PLASTICS BASED ON POLYISOCYANATES ABSTRACT OF THE DISCLOSURE The instant invention is directed to a process for the production of molded polyisocyanate-based foam products having a compact, light- and yellowing-resistant polyurethane- based top layer comprising the steps of: A. coating a mold with a liquid polyurethane- polyurea-based coating agent, containing a binder, which reacts to form a light- and yellowing-resistant top layer and B. introducing a foamable reaction mixture into said mold, wherein said binder comprises: i) at least one isocyanate prepolymer having at least two exclusively aliphatically and/or cycloaliphatically bound isocyanate groups and ii) a hardener mixture composed of water and primary polyamines, at least partly in aldimine- or ketimine-blocked form, which have aliphati- cally and/or cycloaliphatically bound amino groups. LeA 18,692

320092

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