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Coating composition

A composition and coating technology, applied in polyester coatings, coatings, layered products, etc., can solve the problems of affecting the storage stability of the composition, reducing the antifouling performance, and the coating film being insufficient to maintain the antifouling performance, etc. Effects of good storage stability, retention of antifouling properties, good film hardness and processability

Inactive Publication Date: 2014-09-10
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the coating compositions disclosed in Patent Document 1 and Patent Document 2 have a problem in that the alkoxysilane compound and organosilicate contained in the coating composition may negatively affect the storage stability of the composition
In addition, coating films obtained by coating these coating compositions do not sufficiently maintain antifouling properties; in particular, semi-gloss coating films of such compositions additionally containing a matting agent such as silica exhibit a sharply reduced Antifouling performance

Method used

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Examples

Experimental program
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preparation example Construction

[0087] The polymerization initiator used in the preparation of the copolymer resin (d) is a polymerization initiator or the like commonly used in a method for producing an acrylic polymer. The amount of the polymerization initiator is usually 0.1% by mass to 20% by mass based on the total amount of the polymerizable unsaturated monomer (d1) and another polymerizable unsaturated monomer (d2).

[0088] Examples of the polymerization initiator include azo polymerization initiators such as 2,2'-azobisisobutyronitrile, azobis-2-methylbutyronitrile, and azobisdivaleronitrile; t-butyl peroxyisobutyrate ester, tert-butyl peroxy-2-ethylhexanoate, tert-amyl peroxy-3,5,5-trimethylhexanoate, tert-butyl peroxyisopropyl carbonate, 2,2-bis(4 , 4-di-tert-butylperoxycyclohexyl) propane and organic peroxide polymerization initiators.

[0089] Any known method can be used as a method for obtaining the copolymer resin (d). Among them, the solution polymerization method is preferable. An exampl...

Embodiment

[0123] The present invention is described in more detail below with reference to Examples and Comparative Examples. The present invention is not limited by the following examples. "Parts" and "%" as shown below are based on mass.

[0124] Preparation of hydroxyl-containing polyester resin (a)

preparation example 1-

[0125] Preparation Example 1-Preparation of Polyester Resin Solution (Component a1)

[0126] 1079 parts of isophthalic acid, 407 parts of adipic acid, 466 parts of neopentyl glycol and 802 parts of trimethylolpropane were placed in a reaction device equipped with a thermometer, stirrer, heater and distillation column, and heated to 160 ℃. The temperature was further increased gradually from 160°C to 230°C over 3 hours.

[0127] Then, after allowing the reaction to proceed at 230° C. for 30 minutes, the distillation column was replaced by a water separator. 124 parts of xylene were added to the mixture, and xylene was also added to the water separator to azeotrope the water and xylene, and remove condensed water. The resulting mixture was reacted until an acid value of 10 mg KOH / g was reached. After cooling the mixture, 855 parts of cyclohexanone was added to provide a polyester resin solution having a solid content of 55%. The obtained resin had a hydroxyl value of 184 mg ...

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Abstract

The present invention addresses the problem of providing a coating composition which has good storage stability and is capable of forming a coating film that has good processability and is capable of maintaining contamination resistance under outdoor exposure. The present invention provides a coating composition which contains (a) a hydroxyl group-containing resin, (b) a crosslinking agent, (c) an anionic surfactant containing a sulfonic acid group or a sulfonic acid salt group, and (d) a specific copolymer resin. The anionic surfactant (c) containing a sulfonic acid group or a sulfonic acid salt group is contained in an amount of 1-20 parts by mass and the copolymer resin (d) is contained in an amount of 0.1-20 parts by mass relative to 100 parts by mass of the total solid content of the hydroxyl group-containing resin (a) and the crosslinking agent (b).

Description

technical field [0001] Cross References to Related Applications [0002] This application claims priority from Japanese Patent Application No. 2012-27555 filed on February 10, 2012 (the entire contents of which are incorporated herein by reference). The present invention relates to a coating composition that has good storage stability, can form a coating film with good coating film hardness and processability, and can maintain antifouling performance under long-term outdoor exposure. Background technique [0003] Outdoor coating compositions having excellent weather resistance are applied to outdoor substrates such as buildings, exhibits, fences, equipment and machinery for decorative or protective use. Examples of coating compositions for outdoor applications include polyurethane resin coating compositions, fluororesin coating compositions, silicone resin coating compositions, acrylic resin coating compositions, polyester coating compositions, and the like. However, such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D201/06B32B15/08C09D7/12C09D133/26C09D139/00C09D139/04C09D161/24
CPCC09D7/12C09D139/04B32B15/08C09D139/00C09D161/24C09D167/02C09D133/26C09D201/06C08F220/14C08F226/08C09D133/12C08F220/20C08F220/1806C08F212/08C08F220/1808C08F220/34
Inventor 松浦千里児岛敬
Owner KANSAI PAINT CO LTD