US 2003/0158327 A1 · Polyurethane coating compositions

Abstract

A coating composition containing a polyisocyanate compound having an isocyanate functionality of greater than 1, a polyol compound having an average hydroxyl functionality of greater than 1, wherein the relative amounts of polyisocyanate compound and polyol compound are in an amount effective to provide from 0.5 to 1.5 equivalents of isocyanate groups per equivalent of hydroxyl groups, from 0.0002 to 5 parts by weight of an organometallic curing catalyst selected from organobismuth, organozirconium or organoaluminum curing catalysts per 100 parts by weight of the polyisocyanate compound and from 0.0001 to 2.5 parts by weight of a moisture scavenger per 100 parts by weight of the polyisocyanate compound exhibits improved resistance to surface imperfections due to the phenomenon of “solvent popping”.

Claims16

Dependent claims

A liquid coating composition, comprising:

(a) a polyisocyanate compound having an isocyanate functionality of greater than 1,
(b) a polyol compound having an average hydroxyl functionality of greater than 1, wherein the relative amounts of polyisocyanate compound and polyol compound are in an amount effective to provide from 0.5 to 1.5 equivalents of isocyanate groups per equivalent of hydroxyl groups,
(c) from about 0.0002 to about 5 parts by weight (“pbw”) of an organometallic curing catalyst selected from the group consisting of organobismuth curing catalysts, organozirconium curing catalysts, organoaluminum curing catalysts and mixtures thereof per 100 pbw of the polyisocyanate compound, and
(d) from about 0.0001 to about 5 pbw of a moisture scavenger per 100 pbw of the polyisocyanate compound.

1 more element

Dependencies are inferred from the claim text.

Polyurethane coating compositions

Life of this patent

Polyurethane coating compositions

Life of this patent

Abstract

Claims16