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Low VOC solventborne pigment dispersions compositions for tinting solvent-based coatings

A pigment dispersion, solvent-based technology, used in pigment pastes, organic dyes, fatty acid esterification, etc.

Active Publication Date: 2013-05-01
CHROMAFLO TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention also addresses the problem of formulating solventborne pigment dispersions with relatively low VOC content that have minimal adverse effects on the desirable physical properties of the paint base to which they are incorporated, including the properties of the finished paint. Rheological properties and properties of the cured paint film

Method used

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  • Low VOC solventborne pigment dispersions compositions for tinting solvent-based coatings
  • Low VOC solventborne pigment dispersions compositions for tinting solvent-based coatings
  • Low VOC solventborne pigment dispersions compositions for tinting solvent-based coatings

Examples

Experimental program
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Embodiment

[0080] Example - Preparation of Solventborne Titanium Dioxide Pigment Dispersion

[0081] The following methods of preparing pigment dispersions are exemplary and should not be considered limiting, as other methods known to those skilled in the art can also be used, and using different equipment and standards.

[0082] A. Start batch preparation by adding the resin specified in the recipe to the container.

[0083] B. Add liquid surfactants such as Disperbyk 111 and Rhodafac RS 710 to the resin in the vessel.

[0084] C. Add propylene glycol monomethyl ether acetate (PMA) and soy methyl ester solvents to the surfactant and resin.

[0085] D. Mix the batch for at least 15 minutes to thoroughly mix all liquid raw materials.

[0086] E. The pigment is then slowly added to the batch while mixing to minimize dust and the formation of large clumps.

[0087] F. The batch was then pre-mixed at a rate of 1000-3000 rpm for 30 minutes until the pigment was completely wetted out and th...

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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 the following: a. a vegetable oil-derived solvent component that is one or more methyl esters of vegetable oils; b. an acrylic resin containing at least 60% solids; c. 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 d. one or more organic pigments or one or more inorganic pigment, or a combination thereof.

Description

technical field [0001] The present invention relates to solventborne pigment dispersion compositions or pigment dispersions containing relatively low levels of volatile organic compounds (VOCs) for use in the preparation of pigmented solventborne coatings. As used herein, the terms "colorants", "colorant composition" and "pigment dispersion" are intended to have the same meaning and are used interchangeably. Background technique [0002] Various federal and state agencies in the United States, as well as regulatory agencies in Europe and other countries, have announced or established mandates requiring the reduction of volatile organic compound (VOC) emissions from surface coatings or paints. Typically, solvent-based surface coatings are finally prepared for use by adding one or more pigment dispersions containing pigments and other additives to achieve the color, hues and tints desired by the user. In some cases, the pigment dispersion is added to a clear base or to an opa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/04
CPCC08K5/101C08K5/10C09D17/002C09D17/003C08K3/0033C09D17/004C08K3/013C09B67/001C09B67/0013C09B67/009
Inventor Y·帕特尔S·P·里卡迪D·戈德堡J·小巴普蒂斯塔L·德里森
Owner CHROMAFLO TECH CORP