Aqueous paint composition and method for forming coating

一种水性涂料、组合物的技术，应用在化学仪器和方法、聚酯涂料、聚脲/聚氨酯涂料等方向，能够解决多层涂膜耐崩裂性不充分、多层涂膜平滑性和鲜映度降低等问题

Active Publication Date: 2015-01-28
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the method for forming a coating film described in Patent Document 5 has the following situation, that is, when using a water-based paint as an intermediate layer paint and a base layer paint, mixed layers in the layers of the water-based intermediate layer paint and the water-based base layer paint occur. The resulting decrease in the smoothness and distinctness of image of the multilayer coating film, or the cracking resistance of the formed multilayer coating film becomes insufficient

Method used

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  • Aqueous paint composition and method for forming coating
  • Aqueous paint composition and method for forming coating
  • Aqueous paint composition and method for forming coating

Examples

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preparation example Construction

[0148] The preparation method of the hydroxyl-containing polyester resin (A1) is not particularly limited, and can be carried out according to a conventional method. For example, a hydroxyl-containing polyester resin can be prepared by heating the above-mentioned acid component and alcohol component at about 150° C. to 250° C. for about 5-10 hours in a nitrogen stream to carry out the above-mentioned acid component and alcohol component. Esterification or transesterification of ingredients.

[0149] When subjecting the said acid component and alcohol component to esterification reaction or transesterification, these may be added together to a reaction container, and one or both components may be divided and added several times. Furthermore, after synthesizing the hydroxyl-containing polyester resin first, the obtained hydroxyl-containing polyester resin can be reacted with an acid anhydride to half-esterify it to obtain a carboxyl- and hydroxyl-containing polyester resin. Alt...

Embodiment

[0530] Hereinafter, the present invention will be described more concretely with reference to Examples and Comparative Examples. However, the present invention is not limited to these Examples. It should be noted that "parts" and "%" are all based on mass.

[0531] Preparation of hydroxyl-containing polyester resin (A1)

preparation example 1

[0533] Add 174 parts of trimethylolpropane, 327 parts of neopentyl glycol, 352 parts of adipic acid, 109 parts of isophthalic acid into a reaction vessel equipped with a thermometer, thermostat, stirring device, reflux condenser and water separator and 101 parts of 1,2-cyclohexanedicarboxylic anhydride, heated from 160°C to 230°C over 3 hours, and kept at 230°C while distilling off the generated condensation water with a water separator, and allowed to react until The acid value is 3 mgKOH / g or less. By adding 59 parts of anhydrous trimellitic acid to the reaction product, and performing an addition reaction at 170°C for 30 minutes, cooling to below 50°C, and adding 2-(dimethylamino)ethanol equivalent to the acid group After neutralization, deionized water was gradually added to obtain a hydroxyl group-containing polyester resin solution (A1-1) having a solid content concentration of 45% and a pH of 7.2. Based on the total amount of the acid components of the obtained hydroxy...

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Abstract

The objective of the present invention is to provide an aqueous paint composition that can form a coating with excellent smoothness, image clarity, water resistance, and chipping resistance; and that has excellent cleaning properties, as well as a method for forming a coating. As means for achieving this purpose, the present invention provides an aqueous paint composition used as an aqueous first colored paint for a multilayer coating forming method, wherein the paint composition is characterized in including (A) an aqueous film-forming resin, (B) a cross-linking agent, and (C) acrylic urethane resin composite particles. The acrylic resin of the acrylic urethane resin composite particles (C) is obtained by using, as a monomer component, 30 to 80 percent by mass of a polymeric unsaturated monomer (c-1-1) having one polymeric unsaturated group in a single molecule and having a C4-22 alkyl group, 1 to 20 percent by mass of a polymeric unsaturated monomer (c-2) having two or more polymeric unsaturated groups in a single molecule, and 0 to 69 percent by mass of a polymeric unsaturated monomer (c-1-2) having one polymeric unsaturated group other than (c-1-1) in a single molecule.

Description

technical field [0001] The present invention relates to a water-based paint composition and a method for forming a coating film using the water-based paint composition. Background technique [0002] In the past, as a method of forming a coating film on an automobile body, the method of applying electrodeposition coating to the object to be coated, heating and curing it, and forming a multi-layered coating by the 3-coating-2-baking method and the 2-coating-2-baking method has been widely used. Coating, the above-mentioned 3-coating 2-baking method is to carry out the following steps in sequence: (1) coating of the intermediate layer coating → (2) heat curing → (3) coating of the base layer coating → (4) preheating (preheating ) → (5) coating of transparent paint → (6) heating and curing; the above-mentioned 2-coating and 2-baking method is to carry out the following processes in sequence: (1) coating of intermediate layer coating → (2) heating and curing → (3) top Coating co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D201/00B05D1/36B05D7/24B32B27/20C09D5/00C09D5/02C09D7/12C09D133/00C09D151/08C09D167/00C09D175/04C09D175/06C09D175/08
CPCC09D5/024C09D201/00C09D151/08C09D175/04C08G18/8077C08G18/4219C09D5/00C09D167/00C08G18/758B32B27/20C08G18/625C08G18/8096C08G18/8064C08G18/4063C08G18/44C09D7/12C08G18/8093C09D5/02C08F220/14C08F220/18C08F290/067C08G18/0819C08G18/423C08G18/4238C08G18/4263C08G18/4854C08G18/6266C08G18/755C08L51/08B05D7/572B05D2451/00C08F220/1804C25D7/00C08L75/04C08L33/066B05D2401/20B05D2401/40C08L59/00C08L83/04C08F220/1818C08F220/20C08F220/06C08F212/08C08F230/02C08F220/1808C08F283/02C09D7/40C08K3/013Y10T428/31551B05D5/06C08K2003/3045C09D167/02C08F220/40
Inventor 神田崇史
Owner KANSAI PAINT CO LTD
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