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Coating compositions containing rheology control agents

A rheology control agent, composition technology, applied in action, dendritic ether, polyether or hydrocarbon chain, can solve the problem of no recommended coating composition, insufficient compatibility, flow of finish paint, etc., to achieve pigment and Improved flake retention, excellent overall appearance, and spray-enhancing effects

Inactive Publication Date: 2008-03-05
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Additional problems are caused by many regulations requiring the use of low VOC (volatile organic compound content) coating compositions to reduce air pollution
Typically, these low VOC coating compositions have a VOC of 2.1 lbs / gallon (252 g / l) or less, and when applied by conventional spray techniques there is often a problem with the finish running and sagging after application, and questions about proper flake orientation and control
Furthermore, some rheology control agents, such as those disclosed in US Patent 4,311,622 or WO 02064684, show insufficient compatibility in resin systems for specific rheology control agents prepared by using hydroxyl functional monoamines
[0010] US Patent Publication 2002 / 059961 (published October 31, 2002) shows gelling agents for use in gel oils and cosmetic compositions such as antiperspirants, but does not suggest use in coating compositions

Method used

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  • Coating compositions containing rheology control agents
  • Coating compositions containing rheology control agents
  • Coating compositions containing rheology control agents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] The following reactions were performed under a nitrogen blanket. 2.28 g (0.0107 mol) of methyl lysine diisocyanate as an organic diisocyanate was added dropwise to a flask equipped with a stirrer and filled with a solution of 2.75 g (0.0212 mol) of octylamine in 30 ml of chloroform, The reaction mixture was kept at room temperature under constant stirring for about 2 hours. The reaction mixture was monitored by IR spectroscopy, and when the isocyanate peak (about 2258 cm -1 ) disappeared and the reaction was considered complete and the reaction mixture was filtered to remove the product formed and any residual solvent was removed under vacuum. 4.21 g of product were obtained, a yield of 84%. The resulting rheology control agent has the following formula:

[0159]

Embodiment 2

[0161] The following reactions were performed under nitrogen blanket. 23.18 g (0.1092 mol) of methyl lysine diisocyanate as an organic diisocyanate was added dropwise to a flask equipped with a stirrer and containing 37.05 g (0.2163 mol) of undecylamine in 700 ml of chloroform. solution, the reaction mixture was kept at room temperature under constant stirring for about 2 hours. The reaction mixture was monitored by IR spectroscopy, and when the isocyanate peak (about 2258 cm -1 ) disappeared and the reaction was considered complete and the reaction mixture was filtered to remove the product formed and any residual solvent was removed under vacuum. 53.89 g of product were obtained, a yield of 89.8%. The resulting rheology control agent has the following formula:

[0162]

Embodiment 3

[0164] The following reactions were performed under nitrogen blanket. 14.53 g (0.068 mol) of methyl lysine diisocyanate as an organic diisocyanate was added dropwise to a flask equipped with a stirrer and filled with 25 g (0.1334 mol) of N-cyclohexyl-(2-hydroxyethyl ) urea and 0.08 g of dibutyltin dilaurate in 340 ml of acetonitrile, and the reaction mixture was refluxed at 78° C. for about 2 hours with constant stirring. The reaction mixture was monitored by IR spectroscopy, and when the isocyanate peak (about 2258 cm -1 ) disappeared and the reaction was considered complete and the reaction mixture was filtered to remove the product formed and any residual solvent was removed under vacuum. 36.79 g of product were obtained, a yield of 94.3%. The resulting rheology

[0165] The formulation has the following formula:

[0166]

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Abstract

The present invention provides a coating composition containing a rheology control agent with improved rheology control properties, particularly in low VOC solventborne coating compositions and waterborne coating compositions for OEM, automotive and truck applications repainting or repainting of the exterior of a body and parts thereof; the rheology control agent used in said coating composition contains the following compound represented by the formula wherein A, B, C and D are CH 2 , CHR, NH, or O, and A, B, C, and D may be the same or different, at least one of A and B being NH, and at least one of C and D being NH; and wherein R 1 , R 2 and R 3 as defined in the specification.

Description

[0001] priority [0002] This application claims priority to U.S. Provisional Patent Application Serial No. 60 / 643,440, filed January 13, 2005, and U.S. Provisional Patent Application Serial No. 60 / 643,482, filed January 13, 2005, both of which are incorporated This article is for reference. Background of the invention [0003] The present invention relates to solvent-based and water-based coating compositions for finishing the exterior of automobiles and trucks, and in particular to coating compositions containing rheology control agents which provide improved rheology control to said compositions To facilitate spraying to provide a high quality automotive finish. [0004] Description of prior art [0005] The current choice for the finish (finish) used on cars and trucks is the clearcoat / pigmented paint finish, where the clearcoat is applied over a pigmented tinted coat or base coat, Thereby protecting the pigmented coating and improving the appearance, gloss and DOI (dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/71C08G18/32C08G18/77C09D5/04C08G18/28C09D7/00
CPCC08K5/21
Inventor C·P·伦格斯牛艳辉萧毓玲丁江R·J·巴索蒂R·J·凯利R·J·布特拉Y·H·金
Owner EI DU PONT DE NEMOURS & CO
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