Aqueous finishing coat

Active Publication Date: 2011-10-19
时锋林 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because large passenger cars, car repair coatings, and plastic parts coatings cannot withstand high-temperature baking, low-temperature drying is generally used, that is, drying at 60-80°C or self-drying at room temperature. Therefore, acrylic polyurethane two-component coatings are usually used at present. For example, domestic buses and coaches are all equipped with solvent-based epoxy antirust paint, solvent-based acrylic polyurethane or polyester polyurethane p

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0020] Example 1

[0021] The water-based topcoat for automobile painting provided in this example is composed of component A and component B, wherein the composition of component A is shown in Table 1, and component B is Bayer VPLS 2319, component A and component B The weight ratio of the points is 4:1.

[0022] Table 1 Composition of component A of Example 1

[0023]

[0024] The preparation method of the water-based topcoat of this example: according to the amount of titanium dioxide used in Example 1, add Byk191 dispersant and part of Bayer 2470 resin, add a certain amount of deionized water, and disperse and grind at a high speed to obtain a white color. Then add the remaining materials, disperse evenly at high speed, filter, and package into A component for later use; in addition, mix B component water-based curing agent Bayer VPLS2319 and propylene glycol methyl ether acetate (PMA) evenly for later use; when using, directly mix the two can be mixed. The weight rat...

Example Embodiment

[0025] Example 2

[0026] The water-based topcoat for automobile painting provided in this example is composed of component A and component B, wherein the composition of component A is shown in Table 2, and component B is a mixture of Bayer VPLS 2319 and Bayer XP 2565 , the weight ratio of A component and B component is 2:1.

[0027] Table 2 Composition of component A of Example 2

[0028]

[0029] The preparation method of the water-based topcoat of the present embodiment: according to the amount of titanium dioxide used in Example 2, add Tego735w dispersant of Digao Company, XK540 resin of DSM Company and part of 2470 resin of Bayer Company, and then add a certain amount of deionized water. Disperse and grind to obtain a white color paste; then add the remaining materials, disperse evenly at high speed, filter, and package into component A for use; in addition, component B waterborne curing agents Bayer VPLS2319, Bayer XP2565 and propylene glycol methyl ether acetate ( ...

Example Embodiment

[0030] Example 3

[0031]The water-based topcoat for automobile painting provided in this example is composed of component A and component B, wherein the composition of component A is shown in Table 3, and component B is VPLS 2319 from Bayer and 803 from Rhodia. Mixture, the weight ratio of A component and B component is 6:1.

[0032] Table 3 Composition of A component of Example 3

[0033]

[0034] The preparation method of the water-based topcoat of the present embodiment: according to the amount of titanium dioxide used in Example 3, add Borchers company Gen 0451 dispersant, Nuppers company SC 6516 resin and part of Bayer company 2470 resin, then add a certain amount of deionized water, after high speed Disperse and grind to obtain a white color paste; then add the remaining materials, disperse uniformly at high speed, filter, and package into component A for use; in addition, component B waterborne curing agent Bayer VPLS2319, Rhodia 803 and propylene glycol methyl eth...

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PUM

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Abstract

The invention discloses an aqueous finishing coat. The aqueous finishing coat is composed of a component A and a component B, wherein the component A is composed of the following components by weight percent: 55-85% of aqueous acrylic emulsion, 5-25% of tinting color, 0.5-2.5% of dispersant, 0.5-2% of defoaming agent, 0.5-2% of base material humectant. 0.5-1% of flatting agent, 0.1-0.5% of rheological additive, 0.1-0.5% of catalyst, 0.5-1.5% of light stabilizer and the balance of deionized water; the component B is an aqueous firming agent; and the weight ratio of the component A to the component B is (2-6) to 1. The aqueous finishing coat provided by the invention realizes the aquosity of the finishing cost for a car coating and the amount of the contained harmful substances is obviously reduced; the harmful substances, such as benzene, toluene, dimethylbenzene, ethylbenzene and the like, are not detected; and the content of VOC (Volatile Organic Compounds) is greatly reduced and the content of the free formaldehyde is obviously reduced. The aqueous finishing coat provided by the invention has the advantages of reducing the pollution on the environment and also improving the work environment of the coating operating personnel.

Description

technical field [0001] The invention relates to the technical field of automobile coatings, in particular to a water-based finish paint. Background technique [0002] Over the past 30 years, my country's automobile industry has developed rapidly, especially in the last 20 years, the automobile industry has shown a blowout rapid growth. In 2009, the total output of automobiles nationwide reached 13.79 million, and the number of automobiles has reached 76.19 million. The great development of the automobile industry has also led to the development of automobile coating technology. At the same time, automobile coatings have also made great progress. [0003] At present, my country's automotive coatings are still dominated by solvent-based systems, which contain a large amount of volatile organic compounds (VOC), which pollute the environment very seriously. Since the 1960s, in order to protect the living environment of human beings, countries around the world have enacted rele...

Claims

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Application Information

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IPC IPC(8): C09D133/00
Inventor 徐伟良时锋林
Owner 时锋林
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