Patent ID: 8841402

Claim:
A process of making a coated substrate, comprising: coating a substrate with a coating composition comprising at least one isocyanate-group-containing prepolymer obtained by reacting (a) a polyoxyalkylene polyol, with (b) at least one isocyanate compound comprising an alicyclic isocyanate, an aliphatic isocyanate, or a combination thereof in the presence of an organic acid bismuth salt catalyst, wherein said polyoxyalkylene polyol (a) comprises as a mixture: from 20% by mole to less than 100% by mole of a first polyoxyalkylene polyol having three hydroxyl groups and a hydroxyl-value-converted molecular weight of from 500 to less than 2,000, and from more than 0% by mole to 80% by mole of a second polyoxyalkylene polyol having three hydroxyl groups and a hydroxyl-value-converted molecular weight of from 2,000 to 5,000, where the percents by mole are relative to 100% by mole of the mixture, the isocyanate compound is present during said reacting in such an amount as to result in an isocyanate index of 150-300, and said polyoxyalkylene polyol (a) has an oxyethylene group content of 85-100% by mass based on all oxyalkylene groups thereof (100% by mass); and curing said coating composition.