Patent ID: 6723787
Filing Date: 2004-04-20
Classification: C09D

Abstract:
A solvent-free, two-component polyurethane coating composition that is suitable for the production of coatings that have long term resistance to temperatures of up to 30Â° C., have good elongation and withstand cathodic protection, which comprisesA) a solvent-free polymer mixture comprising I) 5 to 50 wt. % of a component free from OH groups and comprising 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 &gE;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 11-a) to 11-c) add up to 100 wt. %, based on the weight of component 11) 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.