C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/80 (2006.01) C08G 18/10 (2006.01) C09J 175/04 (2006.01)
Patent
CA 2518132
The present invention relates to reactive compositions containing A) one or more blocked polyurethane prepolymers which have a content of blocked isocyanate groups (calculated as NCO) of 0.1 to 20 wt.% and are prepared from i) at least one aromatic, aliphatic, araliphatic and/or cycloaliphatic diisocyanate having a content of free NCO groups of 5 to 60 wt.%, ii) a polyol component containing at least one polyester polyol, and/or at least one polyether polyol and/or at least one polycarbonate polyol, iii) CH-acidic cyclic ketones corresponding to formula (I) as blocking agents (see formula I) wherein X represents an electron-attracting group, R1 and R2 independently of one another represent the radicals H, C1-C20 (cyclo)alkyl, C6-C24 aryl, C1-C20 (cyclo)alkyl ester or amide, C6-C24 aryl ester or amide, mixed aliphatic/aromatic radicals with 1 to 24 carbon atoms that can also be part of a 4- to 8-membered ring, n is an integer from 0 to 5, and B) one or more OH-functional compounds in which the OH component undergoes activation by a .beta.-position amine component. The present invention also relates to a composite system containing two adherends bonded together with the reactive composition according to the invention.
Guertler Christoph
Meckel Walter
Schelhaas Michael
Trinks Rainer
Wintermantel Matthias
Bayer Materialscience Ag
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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