Liquid pigment dispersion and curative agents
AssigneePPG Industries Ohio, Inc.
InventorsKelly J. Gasper, Constantine A. Kondos
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Abstract
A liquid pigment dispersion is disclosed. The dispersion comprises a pigment dispersed in a blend of two or more active hydrogen-containing materials that together have a freezing point that is room temperature or below. The pigment remains dispersed in the blend, even if the dispersion is subjected to freezing and thawing. A curative blend comprising at least two active hydrogen-containing materials, which is liquid at room temperature, is also disclosed. The dispersions and curative blends of the present invention can be solvent-free. Resins and prepolymers comprising the curative blends of the invention, either pigmented or unpigmented, are also disclosed.
Claims38
A pigment dispersion that is liquid at room temperature and below comprising:
- a pigment dispersed in a blend of two or more active hydrogen-containing materials, wherein each active hydrogen-containing material may have a different freezing point.
A curative blend comprising:
- a) a first active hydrogen-containing material and
- b) a second active hydrogen-containing material;
- wherein the active hydrogen-containing materials have different freezing points, and the freezing point of the blend is 60° F. or less.
A solvent-free pigment dispersion that can be frozen, thawed, and used without redispersing the pigment.
Dependencies are inferred from the claim text.