Low VOC solventborne dispersion compositions for tinting solvent-based coatings
AssigneeChromaflo Technologies Corporation
InventorsYamini Patel, Steven Paul Riccardi, Daniel Goldberg, Jadel Baptista, Jr., Luc Driessen
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Abstract
A solventborne pigment dispersion having a volatile organic chemical (VOC) content that is less than 250 g/L for tinting solvent-based surface coatings is formulated using a vegetable oil-derived solvent component that is one or more methyl esters of vegetable oils, an acrylic resin containing at least 60% solids, one or more highly concentrated surfactants containing up to 100% by weight of active constituents and that contains no PMA or free aromatic moieties, and one or more organic pigments or one or more inorganic pigment, or a combination thereof.
Claims11
A solventborne pigment dispersion having a volatile organic chemical (VOC) content that is less than 250 g/L for tinting solvent-based surface coatings, the pigment dispersion comprising:
- a vegetable oil-derived solvent component that is a mixture of methyl esters of one or more vegetable oils;
- a high solids content resin, or mixture of resins, containing at least 60 percent solids and present in amounts ranging from 9.0 to 40.0 parts by weight of the total solventborne pigment dispersion;
- one or more surfactants that contain no alkyl phenol ethoxylate moieties or free aromatic compounds and present in amounts from 5.0 to 22.0 parts by weight of the total solventborne pigment dispersion;
- at least one organic pigment or at least one inorganic pigment, or mixtures thereof;
- at least one alternative viscosity-controlling solvent in amounts ranging from 4.5 to 15.0 parts by weight of the total solventborne pigment dispersion, wherein the viscosity controlling solvent reduces and maintains the viscosity of the solventborne pigment dispersion at values ranging from about 153 cP to about 375 cP.
Dependencies are inferred from the claim text.