Isocyanate composition and method for producing isocyanate polymer

Abstract

An isocyanate composition according to the present invention contains: a difunctional or more-functional isocyanate compound; and 1.0 ppm by mass to 1.0 × 104 ppm by mass, based on the isocyanate compound, of a compound having at least one unsaturated bond excluding unsaturated bonds constituting an aromatic ring, the compound being different from the isocyanate.

1 . An isocyanate composition comprising:
 a difunctional or more-functional isocyanate compound; and,   1.0 ppm by mass to 1.0 × 10 4  ppm by mass, based on the isocyanate compound, of a compound having an UV absorption in an area of decamer or higher isocyanates in a measurement spectrum of gel permeation chromatography, and/or,   1.0 ppm by mass to 1.0 × 10 4  ppm by mass, based on the isocyanate compound, of a compound having an isocyanurate group and/or a biuret group.   
     
     
         2 . The isocyanate composition according to  claim 1 , comprising 1.0 ppm by mass to 1.0 × 10 3  ppm by mass, based on the isocyanate compound, of a sulfuric acid and/or a sulfuric acid ester, and/or, 1.0 ppm by mass to 1.0 × 10 3  ppm by mass, based on the isocyanate compound, of a phosphoric acid and/or a phosphoric acid ester. 
     
     
         3 . A method for producing an isocyanate polymer, comprising reacting an isocyanate compound comprised in the isocyanate composition of  claim 1 ,
 wherein the isocyanate polymer comprises: a unit of formula (A) or (B); and at least one unit selected from the group consisting of units of formulae (2), (3), (4), (5), (6), (7) and (8), and   a nitrogen atom constituting the isocyanate polymer bonds with a carbon atom:                                                                                                                                                                                                         wherein, each R 3  independently represents a residual group obtained by removing two isocyanate groups from the isocyanate compound, and each R 4  independently represents a monovalent organic group.   
     
     
         4 . The isocyanate composition according to  claim 1 , comprising 0 ppm by mass to 1.0 × 10 4  ppm by mass, based on the isocyanate compound, of the compound having the UV absorption in the area of decamer or higher isocyanates in the measurement spectrum of gel permeation chromatography. 
     
     
         5 . The isocyanate composition according to  claim 1 , comprising 1.0 ppm by mass to 1.0 × 10 4  ppm by mass, based on the isocyanate compound, of the compound having the isocyanurate group. 
     
     
         6 . The isocyanate composition according to  claim 1 , comprising 1.0 ppm by mass to 1.0 × 10 4  ppm by mass, based on the isocyanate compound, of the compound having the biuret group. 
     
     
         7 . The isocyanate composition according to  claim 1 , comprising 1.0 ppm by mass to 1.0 × 10 4  ppm by mass, based on the isocyanate compound, of the compound having the isocyanurate group and a biuret group. 
     
     
         8 . The isocyanate composition according to  claim 1 , comprising 1.0 ppm by mass to 1.0 × 10 3  ppm by mass, based on the isocyanate compound, of the sulfuric acid. 
     
     
         9 . The isocyanate composition according to  claim 1 , comprising 1.0 ppm by mass to 1.0 × 10 3  ppm by mass, based on the isocyanate compound, of the sulfuric acid ester. 
     
     
         10 . The isocyanate composition according to  claim 1 , comprising 1.0 ppm by mass to 1.0 × 10 3  ppm by mass, based on the isocyanate compound, of the sulfuric acid and a sulfuric acid ester.