Colored coating composition

A technique for coloring paints and compositions, applied to polyester paints, coatings, devices for coating liquids on surfaces, etc., capable of solving problems such as metallic stains, poor smoothness, and easy occurrence of metallic stains

Active Publication Date: 2008-08-20
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in general, the coating film obtained by using the above-mentioned water-based paint is inferior in smoothness, etc., compared with the coating film obtained by using an organic solvent-based paint.
In addition, water-based paints containing pearlescent pigments have the following problems: Compared with the coating films obtained by organic solvent-based paints, the triggering properties of water-based paints containing pearlescent pigments are poor, and metallic stains are prone to occur.
However, in this coating method, mixed layers are likely to occur between the middle coating film and the upper coating film, so the smoothness and triggerability of the formed coating film may be poor, or metallic stains may occur.

Method used

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Examples

Experimental program
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Effect test

manufacture example 1

[0199] In a reaction vessel equipped with a thermometer, a constant temperature box, a stirring device, a reflux condenser and a water separator, add 174 parts of trimethylolpropane, 327 parts of neopentyl glycol, 352 parts of adipic acid, and 109 parts of isophthalic acid. parts and 101 parts of 1,2-cyclohexanedicarboxylic acid anhydride, after raising the temperature to 160°C to 230°C over 3 hours, while using a water separator to distill off the condensation water, it was kept at 230°C to react until the acid The value is 3 mgKOH / g or less. Add 59 parts of trimellitic anhydride to this reaction product, and perform addition reaction at 170°C for 30 minutes, then cool to 50°C or lower, add 2-(dimethylamino)ethanol to acid group equivalent, and neutralize , deionized water was slowly added to obtain a hydroxyl-containing polyester resin solution (A1-1) with a solid content concentration of 45% and a pH of 7.2. The acid value of the obtained hydroxyl group-containing polyeste...

manufacture example 2

[0202] In a reaction vessel equipped with a thermometer, a constant temperature box, a stirring device, a reflux condenser and a water separator, add 168 parts of trimethylolpropane, 316 parts of neopentyl glycol, 93 parts of adipic acid, and 211 parts of isophthalic acid parts, 188 parts of phthalic anhydride, and 65 parts of 1,2-cyclohexanedicarboxylic anhydride. After raising the temperature to 160°C to 230°C over 3 hours, the water generated by the condensation reaction was distilled off with a water separator. , while keeping at 230°C, it was reacted until the acid value was 3 mgKOH / g or less. Add 59 parts of trimellitic anhydride to this reaction product, and perform addition reaction at 170°C for 30 minutes, then cool to 50°C or lower, add 2-(dimethylamino)ethanol to acid group equivalent, and neutralize , deionized water was slowly added to obtain a hydroxyl-containing polyester resin solution (A1-2) with a solid content concentration of 45% and a pH of 7.2. The obtai...

manufacture example 3

[0205] In a reaction vessel equipped with a thermometer, a constant temperature box, a stirring device, a reflux condenser and a water separator, add 166 parts of trimethylolpropane, 314 parts of neopentyl glycol, 338 parts of adipic acid and 1,2-cyclo 194 parts of hexanedicarboxylic acid anhydride, heated up to 160°C to 230°C over 3 hours, kept at 230°C while distilling off the water generated by the condensation reaction with a water separator, and reacted until the acid value was 3mgKOH / g or less. Add 94 parts of 1,2-cyclohexanedicarboxylic acid anhydride to this reaction product, and perform addition reaction at 170°C for 30 minutes, then cool to below 50°C, and add 2-(dimethyl (amino)ethanol and neutralized, deionized water was slowly added to obtain a hydroxyl-containing polyester resin solution (A1-3) with a solid content concentration of 45% and a pH of 7.2. The obtained hydroxyl group-containing polyester resin had an acid value of 35 mgKOH / g, a hydroxyl value of 10...

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Abstract

The present invention provides a colored coating composition and coating film-forming method that are capable of forming a multilayer coating film having excellent appearance with excellent smoothness, high flip-flop effect, and little metallic mottling. The colored coating composition comprises: (A) a hydroxy-containing resin, (B) a curing agent, (C) a diester compound represented by Formula (1) wherein R<1 >and R<2 >are each independently a C4-18 hydrocarbon group, R<3 >is a C2-4 alkylene group, m is an integer of 3 to 25, and m oxyalkylene units (R<3>-O) may be the same or different, (D1) a coloring pigment, and (D2) an extender pigment; the total amount of the coloring pigment (D1) and the extender pigment (D2) being 40 to 180 parts by mass per 100 parts by mass of the hydroxy-containing resin (A) and the curing agent (B) in total.

Description

technical field [0001] The present invention relates to a colored coating composition and a coating film forming method using the coating composition. Background technique [0002] In order to impart excellent corrosion resistance and appearance to the automobile body, especially its outer panels, a multilayer coating film is generally formed. It consists of excellent middle coating film and top coating film with excellent appearance. [0003] Among them, the upper coating film is usually formed by various methods such as colored paint, colored base paint, and clear paint. For example, the following methods can be used: apply the colored paint, and then sinter and solidify it; apply the colored base paint containing pearlescent pigments, colored pigments and other pigments, and coat the uncured colored base paint film Applying a clear paint, and then sintering and curing the colored base coating film and the transparent coating film at the same time, the two-coating-one-ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D5/02B05D1/36
CPCB05D7/542B05D7/14B05D7/58C08K5/103
Inventor 丹羽纪雄
Owner KANSAI PAINT CO LTD
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