ApplicationNo. 06/330290 filed on 12/14/1981
US Classes:528/45, From at least one blocked -N=C=X group427/239, Metal base427/385.5, Resin, resin precursor, rubber, or hardenable oil-containing coating428/425.8, Next to free metal525/124, Blocked isocyanate reactant525/403, Solid polymer is derived from 1,2-epoxy compound containing only one 1,2 epoxy group as sole reactant and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof525/440, Mixed with -N=C=X reactant or polymer derived therefrom (X is chalcogen); or wherein solid polymer is derived from a -N=C=X reactant and also a polycarboxylic acid or derivative and a polyhydroxy reactant525/453, Solid polymer derived from -N=C=X reactant and polyhydroxy reactant525/454, Mixed with carboxylic acid or derivative reactant or polymer derived therefrom; or with heterocyclic reactant containing more than one heterocyclic ring; or polymer therefrom528/66Reactant having two -XH groups contains two or more -C-X-C- groups or two or more carboxylic acid ester groups
ExaminersPrimary: Kight, III, John
Assistant: Moore, M. L.
Attorney, Agent or Firm
International ClassesC08G 18/00 (20060101)
C08G 18/08 (20060101)
C08G 18/10 (20060101)
C08G 18/66 (20060101)
C08G 18/80 (20060101)
AbstractA polyurethane crosslinker is provided by reacting a partially-blocked diisocyanate and a hydroxyl-terminated, carboxyl group-containing polyurethane precursor. The precursor is a reaction product of a diol containing a carboxyl group and another diol of high molecular weight, and a diisocyanate. The instant crosslinkers are particularly useful in water-based coating compositions for metal containers.
Field of SearchFrom at least one blocked -N=C=X group