coating composition

A composition and coating technology, applied in polyester coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of insufficient retouching, poor coating workability, insufficient weather resistance and hydrolysis resistance, etc. , to achieve the effect of excellent adhesion, excellent weather resistance, chemical resistance and excellent weather resistance

Active Publication Date: 2018-03-30
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the inventions described in Patent Documents 2 and 3 are insufficient in terms of weather resistance and hydrolysis resistance. In addition, if the coating solid content is increased during coating, the coating workability is deteriorated due to an increase in viscosity. , in addition, sometimes the retouching is not enough

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0076] The polyol component used for the preparation of the hydroxyl group-containing polyester resin (B) may consist of only the cyclic polyol compound (b1), or may consist of the cyclic polyol compound (b1) and other polyols.

[0077] As other polyols other than the cyclic polyol compound (b1), for example, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, neopentyl glycol, 1,2- or 1 , 3-propanediol, 1,6-hexanediol, 1,4-dimethylolcyclohexane, dipropylene glycol, butanediol, pentanediol, hexanediol, cyclohexanedimethanol, bis(hydroxymethyl base) dihydric alcohols such as xylene; glycerin, 1,1,1-trimethylolpropane, 1,2,3-butanetriol, pentaerythritol, dipentaerythritol and other alcohols with more than three valences. In addition, a hydroxyl group-containing modified oligomer formed by subjecting a polyol having two or more hydroxyl groups in one molecule to a lactone and undergoing a ring-opening esterification reaction can also be used...

manufacture example 1

[0146] (Production example 1) Production of hydroxyl-containing acrylic resin (A-1)

[0147] Put 60 parts of SWASOLE 1000 (Note 1) in a reaction vessel equipped with a stirring device, a thermometer, a reflux condenser, a thermostat, and a pump for dropping, and raise the temperature to 145°C while blowing in nitrogen gas and stirring, and use the pump for dropping Add the following monomers and polymerization initiator dropwise to the reaction vessel at a certain speed for 3 hours

[0148]

[0149]

[0150] mixture. Then, a mixture of 0.5 parts of di-tert-amyl peroxide and 10.0 parts of SWASOLE 1000 was added dropwise over 1 hour. After the dropwise addition was completed, the mixture was aged at the same temperature for 3 hours to complete the reaction. The obtained solution of the hydroxyl-containing acrylic resin (A-1) was a uniform transparent solution with a solid content of 60%. Moreover, the weight average molecular weight of resin (A-1) was about 4700, the gl...

manufacture example 2 to 5

[0153] (Production Examples 2 to 5) Production of Hydroxyl-containing Acrylic Resins (A-2) to (A-5)

[0154] In manufacture example 1, except having mixed it according to the compounding of Table 1, it carried out similarly to manufacture example 1, and obtained the solution of hydroxyl-containing acrylic resin (A-2) - (A-5). Table 1 shows the solid content, weight average molecular weight, glass transition point temperature, hydroxyl value, and acid value of the obtained hydroxyl group-containing acrylic resins (A-2) to (A-5).

[0155] [Table 1]

[0156]

[0157]

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Abstract

The present invention provides a coating composition capable of obtaining a coating film having excellent adhesion to a substrate and excellent finishing properties, coating film hardness, stain resistance, weather resistance, and hydrolysis resistance even in one coating application . The present invention is a coating composition comprising (A) a hydroxyl-containing acrylic resin, (B) a hydroxyl-containing polyester resin, (C) a coloring pigment and / or a gloss pigment, and (D) a polyisocyanate compound, characterized in that, The hydroxyl group-containing polyester resin (B) is a polyester resin having a hydroxyl value of 20 mgKOH / g to 250 mgKOH / g obtained by reacting a polyhydric alcohol comprising a uric acid ester structure cyclic polyol compound (b1) with a polybasic acid, Based on the total resin solid content of components (A) and (B), the solid content of the hydroxyl-containing polyester resin (B) is 5% by mass to 60% by mass.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Japanese Patent Application No. 2013-144459 filed on July 10, 2013, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to a coating composition capable of obtaining a coating film having excellent adhesion to a coated object and excellent finishing properties, coating film hardness, stain resistance, weather resistance, and hydrolysis resistance even in one coating application . Background technique [0004] Plastic moldings such as ABS resins, urethane resins, and polyamide (nylon) resins are often used instead of metals for parts such as automobile exterior panels and home appliances. [0005] In order to impart design and durability to plastic molded articles, a coating composition is usually applied thereon. Conventionally, in order to impart design and durability, as a coating method, for example, a doubl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04B05D1/36B32B27/20B32B27/30B32B27/36C08G18/40C08G63/685C09D7/63C09D7/65C09D7/61C09D133/14C09D167/00
CPCB32B27/20B32B27/30B32B27/36C09D133/14C09D175/04B32B27/08B32B2307/712B32B2605/00C08G18/6229C08G18/6254C08K5/0041C09D7/41C09D7/61C08K3/013C08F220/1804C08F220/20C08L67/00C08F220/14C08F220/1811C08F212/08C08F220/1808
Inventor 樱井直树松田英明汤川嘉之
Owner KANSAI PAINT CO LTD
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