| abstract |
A blocked polyisocyanate of the formula nR-Y m nwhere R is an m valent aliphatic, cycloaliphatic, heterocyclic or aromatic residue; each Y, which may be the same or different, isn where R 1 is, or, when n is more than 1, each R 1 , which may be the same or different, is an alkyl, alkenyl, aralkyl, N-substituted carbamyl, phenyl, N0 2 , halogen or -C-O-R 2 group where R 2 is a C 1 -C 4 alkyl group; n is 0, 1, 2 or 3; and m is an integer greater than 1 is useful in paint compositions. |