Patent ID: 8772434
Filing Date: 2014-07-08
Classification: C08G,C09D

Abstract:
1. A blocked polyisocyanate, wherein isocyanate groups of a polyisocyanate which is derived from an aliphatic diisocyanate and a polyol selected from the group consisting of polyester triols and tetraols and satisfies all of the following conditions 1)-6) are mainly blocked with a pyrazole compound: 1) the average number of the isocyanate groups is 3.0 to 20, 2) the trimer concentration of the diisocyanate monomer is 10 to 50% by mass, 3) the concentration of the isocyanate groups is 5 to 22% by mass, 4) the concentration of the polyol components is 5 to 40% by mass, 5) the concentration of the diisocyanate monomer is 3% by mass or less, and 6) the viscosity of the polyisocyanate at 25° C. is from 14000 to 34000 mPa·s.