C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 175/04 (2006.01) C08J 5/12 (2006.01) C09J 5/00 (2006.01)
Patent
CA 2556005
The present invention relates to primer compositions comprising at least one binder which contains isocyanate groups and is prepared from a mixture of an amorphous polyester resin A which is solid at room temperature and contains at least one OH group and from at least one polyisocyanate B of the formula (I). The ratio of solid polyester resin A and polyisocyanate B is employed in this case in a ratio such that the stoichio- metric ratio of the NCO groups to the OH groups is situated in the range between 50:1 and 100:1 and/or the weight ratio of polyester resin A to polyisocyanate B has a value between 1.6 and 0.75. The primer compositions are notable in particular for effective adhesion to plastics and paints, especially automobile paints.
Goeldi Michael
Kuelling Annemarie
Gowling Lafleur Henderson Llp
Sika Technology Ag
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