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Multi-colour figure film forming method

A coating film and pattern technology, which is applied in the field of multi-color pattern coating film formation, can solve the problem that the multi-color pattern coating film has insufficient anti-fading oil-based ink pollution resistance, the appearance of the multi-color pattern coating film is reduced, and the weather resistance performance is very different. big problem

Inactive Publication Date: 2003-02-05
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned problems can be solved by this method, in the case of the low-gloss matt coating film containing more extender pigments such as silicon dioxide in the multi-color pattern coating film, the fading resistance of the formed multi-color pattern coating film, and the The stain resistance of oil-based ink, etc. is not enough, and the weather resistance performance of each color of the multi-color pattern is greatly different, so there is a problem that the appearance of the multi-color pattern coating film is greatly reduced over time.

Method used

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  • Multi-colour figure film forming method
  • Multi-colour figure film forming method
  • Multi-colour figure film forming method

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0085] 133 parts of resin solution of 60% solid content of oil-free polyester resin with a weight average molecular weight of 20,000 and a hydroxyl value of 15 mgKOH / g, and 20 parts of Cymel 303 (a low-nuclear body methylated melamine resin manufactured by Mitsui Cytec Co., Ltd.) , 90 parts of titanium dioxide pigment, 3 parts of silica micropowder with an average particle diameter of about 2 μm and 54 parts of mixed solvent A (Note 1) are mixed and dispersed to obtain 300 parts of white paint base, in which mixed with dodecyl 3.2 parts of a mixture of 1.0 parts of benzenesulfonic acid and 2.2 minutes of di-n-butylamine were further added to mixed solvent A and stirred uniformly to obtain White Paint-1 having a viscosity of 20 seconds measured at 25° C. with a Ford cup #4.

[0086] (Note 1) Mixed solvent A: Suwazo-Lu 1000 (high

[0087] Boiling point aromatic hydrocarbon solvent) / xylene / cyclohexanone=50 / 30 / 20 (weight ratio)

[0088]mixed solvents. Production examples 2 ...

manufacture example 2～11

[0089] The oil-free polyester resin solution was used in the same manner as in Production Example 1, and the compounding composition of Production Example 1 was changed as shown in the following Table 1, except that the compounding method of the sulfonic acid compound and the amine compound was as shown in the following Table 1. In the same manner as in Production Example 1, various paints having a viscosity of 20 seconds measured at 25° C. with a Ford cup #4 were obtained. The paints obtained in Production Examples 9 to 11 were used for comparison.

[0090] Manufacturing example

1

2

3

4

5

6

7

8

9

10

11

paint name

whitewash

Material-1

Black painted

Material-2

blue paint

Material-3

whitewash

Material-4

Black painted

Material-5

whitewash

Material-6

Black painted

Material-7

blue paint

Material-8

whitewash

...

Embodiment 2

[0096] As paints, White Paint-4 obtained in Production Example 4 and Black Paint-5 obtained in Production Example 5 were used.

[0097] As the object to be coated, a galvanized steel sheet that has been coated with a KP color 8451 primer with a dry film thickness of about 5 μm and baked with a primer is further coated with a KP color 1573 white of about 18 μm. Enamel (polyester-melamine resin-based white paint manufactured by Kansai Pigment Co., Ltd.) and baked coated steel sheets (indicated by "coated object B" in Table 2 below).

[0098] The moving speed (linear speed) of the object to be coated was set at 40 m / min. Except that the object to be coated B is used as the object to be coated, the width of the board is taken as 60 cm, and the four multi-nozzle guns are replaced by four two-head guns, the pattern coating is carried out in the same manner as in Example 1.

[0099] Each 2-head gun can alternately form a pattern coating film on the surface of the roller with white s...

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Abstract

The present invention provides a process for forming a matted multicolor pattern coating film having a 60 degree specular gloss of 10 or less by spray-coating and baking plural coating materials having different colors on a moving strip coated article, wherein the above respective coating materials are shrunk matted coating film-forming coating materials each comprising (A) a hydroxyl group-containing organic resin, (B) a low nuclidic methylated melamine resin, (C) a reaction mixture of 1 mole of a sulfonic acid compound and 1.5 mole or more of an amine compound and (D) a color pigment; and in carrying out spray coating, two or more spray-coating apparatuses having two or more coating material-discharging nozzles are used, and coating materials having coating colors which are different from each other are discharged from at least two coating material-discharging nozzles of the above respective spray-coating apparatuses to form a plural number of unit plural color spray patterns in which the above coating materials having different coating colors are present in a mixture.

Description

technical field [0001] The present invention relates to a method for forming a multicolor pattern coating film by spray coating which can form a uniform, matte multicolor pattern coating film even in high-speed coating such as coil coating. Background technique [0002] In the past, when spraying a moving object, the spray gun had to make a large reciprocating motion along the width direction of the moving object to paint, so that the trajectory of the paint became a large zigzag. Therefore, the moving speed of the object to be coated must be fast, usually above 4m / min, which causes the problem that there is an uncoated part on the object to be coated, and the fluctuation of the coating film thickness is large. [0003] When the object to be coated forms a multi-color pattern, the pattern will fluctuate significantly due to the fluctuation of the coating film thickness, so it is particularly necessary to have a small fluctuation of the coating film thickness. In addition, a...

Claims

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Application Information

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IPC IPC(8): B05D5/06B05B7/04B05B7/08B05D1/02B05D1/34C09D5/29
CPCB05B7/0815B05D2202/00B05D1/02B05D1/34B05B7/0892B05D5/06B05D2252/02Y10T428/31504C09D5/29B05B7/0408
Inventor 田中正一菊田真人
Owner KANSAI PAINT CO LTD
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