C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 175/04 (2006.01) C08G 18/10 (2006.01) C08G 18/12 (2006.01) C08G 18/40 (2006.01) C08G 18/66 (2006.01) C09D 175/06 (2006.01)
Patent
CA 2079981
A THERMOSETTING COATING COMPOSITION AND ITS USE FOR PRIMER COATINGS ON METAL SUBSTRATES ABSTRACT OF THE DISCLOSURE The present invention relates to a thermosetting coating composition based on a binder composition containing A) prepolymers containing isocyanate groups blocked with .epsilon.-caprolactam, having an average molecular weight of 1000 to 10,000 and prepared from A1) aromatic polyisocyanates and A2) a component containing at least one organic compound having hydroxyl groups wherein 50 to 100 hydroxyl equivalent percent of component A2) is based on polyesters containing hydroxyl groups and 0 to 50 hydroxyl equivalent percent is based on polyhydroxyl compounds which are free from ester groups and B) a hardener component containing at least one cycloaliphatic polyamine having at least two primary amino groups, in an equivalent ratio of blocked isocyanate groups to amino groups of 1:1 to 1:1.5. The invention also relates to use of the coating compositions to produce stoving-resistant gravel-proof primer coatings on optionally pretreated metal substrates.
Burgdoerfer Hans-Heribert
Konig Eberhard
Schrader Friedrich P. A.
Aktiengesellschaft Bayer
Swabey Ogilvy Renault
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