C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 175/04 (2006.01) B05D 7/14 (2006.01) C09D 5/08 (2006.01) C09D 127/04 (2006.01) C09D 129/10 (2006.01) C09D 133/20 (2006.01) C09D 175/08 (2006.01) C23C 22/00 (2006.01)
Patent
CA 2413259
The present invention relates to a solvent-free, two-component polyurethane coating composition that is suitable for the production of coatings that have tong term resistance to temperatures of to 30°C, have good elongation and withstand cathodic protection, which contains A) a solvent-free polymer mixture containing I) 5 to 50 wt.% of a component free from OH groups and containing a) 0 to 100 wt.% of a chlorinated paraffin or dibutoxybenzene, b) 0 to 100 wt.% of a di-[phenoxy-alkyl]formal, c) 0 to 100 wt.% of a polyacrylonitrile, wherein the percentages of I-a), I-b) and I-c) add up to 100 wt.%, based on the weights of I-a) to I-c), and II) 50 to 95 wt.% of a component having hydroxyl groups comprising a) 40 to 100 wt.% of a component which contains hydroxy groups and ether groups, has a functionality of >= 3.5 and a number average molecular weight of 280 to 1000, and is different from b), b) 0 to 60 wt.% of a hydroxy-functional polyether polyacrylate and c) 0 to 60 wt.% of a hydroxy-functional compound other than a) and b), wherein the wt.% of II-a) to II-c) add up to 100 wt.%, based on the weight of component II) and B) a polyisocyanate component comprising at least one organic polyisocyanate, wherein the NCO:OH equivalent ratio is 0.8:1 to 1.5:1.
Homan Malte
Kolping Karl-Heinz
Schwindt Jurgen
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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