Coating agent composition and use thereof

Abstract

The invention relates to a coating agent composition comprising an isocyanate-group-containing prepolymer obtained by reacting a polyol comprising a polyoxyalkylene polyol having 2-4 hydroxyl groups on average, an oxyethylene group content of 85-100% by mass based on all oxyalkylene groups (100% by mass), and an arithmetic-average molecular weight of 800-2,500 with an alicyclic isocyanate and/or an aliphatic isocyanate in the presence of an organic acid bismuth salt catalyst, the isocyanate(s) being used in such an amount as to result in an isocyanate index of 150-300. The invention can provide a coating agent composition which forms a coating film or film having moisture permeability, excellent in mechanical properties and yellowing resistance, having laundering durability and resistance to sweat deterioration, and containing no organotin compounds.

1 . A coating agent composition comprising an isocyanate-group-containing prepolymer obtained by reacting a polyol comprising a polyoxyalkylene polyol having 2-4 hydroxyl groups on average, an oxyethylene group content of 85-100% by mass based on all oxyalkylene groups (100% by mass), and an arithmetic-average molecular weight of 800-2,500 with an isocyanate compound comprising an alicyclic isocyanate and/or an aliphatic isocyanate in the presence of an organic acid bismuth salt catalyst, the isocyanate compound being used in such an amount as to result in an isocyanate index of 150-300.  
   
   
       2 . The coating agent composition of  claim 1 , wherein the polyoxyalkylene polyol is a polyoxyethylene polyol having 2-4 hydroxyl groups on average and/or a polyoxyethylene-polyoxypropylene polyol having 2-4 hydroxyl groups on average.  
   
   
       3 . The coating agent composition of  claim 1 , wherein the isocyanate compound is isophorone diisocyanate.  
   
   
       4 . The coating agent composition of  claim 1 , wherein the organic acid bismuth salt catalyst is a bismuth salt of an aliphatic carboxylic acid having 6-20 carbon atoms.  
   
   
       5 . The coating agent composition of  claim 1 , wherein the amount of the organic acid bismuth salt catalyst is 5-100 ppm relative to the total amount of all polyols and the isocyanate compound.  
   
   
       6 . An article having a coating film obtained from the coating agent composition of  claim 1 .  
   
   
       7 . A film obtained from the coating agent composition of  claim 1.