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Water-based automobile finish and preparation method thereof

A kind of automotive topcoat, water-based technology, applied in the direction of coating, etc., can solve problems such as poor gloss, poor sun protection and anti-aging performance, and poor weather resistance

Active Publication Date: 2014-01-22
CHANGCHUN SANHUA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current automotive topcoats contain a large amount of volatile organic solvents, and the release of volatile organic solvents usually causes pollution to the environment. At the same time, the current automotive topcoats still have the following technical defects: poor sun protection, anti-corrosion, and anti-aging properties; The flexibility and hardness of the paint film need to be further improved; the weather resistance is not good; the gloss is poor

Method used

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  • Water-based automobile finish and preparation method thereof
  • Water-based automobile finish and preparation method thereof
  • Water-based automobile finish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 25g methyl methacrylate, 8g hydroxyethyl methacrylate, 12g styrene, 3g benzyl methacrylate, 8g acrylic acid, 12g triethoxyvinylsilane, 1g octylphenol polyoxyethylene ether (OP-10) and 1.5g of sodium lauryl sulfate were pre-emulsified by a high-speed stirrer at room temperature to prepare a pre-emulsion.

[0020] Add 100ml of propylene glycol methyl ether and 50ml of isopropanol into a four-necked flask equipped with an electric stirrer, a condenser, and a nitrogen inlet tube, then raise the temperature to 80°C, and add dropwise 0.5g of sodium bicarbonate and 0.6g of potassium persulfate , 120g of deionized water, 0.8g of dodecyl mercaptan and 50.5g of pre-emulsion were added within 1.5h, and after the dropwise addition was completed, the reaction was continued for 2h. Then, add 20g of pre-emulsion and 0.2g of potassium persulfate, and finish adding within 0.5h. After the dropwise addition, raise the temperature to 80°C, continue stirring for 3h, cool down to 40°C, add 8...

Embodiment 2

[0022] The waterborne acrylic ester resin that 50g embodiment 1 obtains, 10g carboxymethyl cellulose acetate butyrate, 20g titanium dioxide, 23g Virahol, 0.3g N, N'-dimethylethanolamine, 30g deionized water, Add 0.3g of DISPERBYK-180 and 0.1g of BYK011 into the high-speed disperser, and stir for 4 hours at a speed of 1200rpm. Then, 0.2 g of BYK333, 0.6 g of BYK420, and 21 g of Cymel 303 were added, and stirred at a speed of 2500 rpm for 5 h. Then, filter with a 200-mesh filter screen to obtain an automotive water-based finish paint. The topcoat was sprayed on the sample plate coated with primer and intermediate paint, and baked at 140°C for 20min to test the performance of the paint film. The performance of automotive water-based topcoat paint and the test results of paint film are shown in Table 1.

Embodiment 3

[0024] The aqueous acrylic ester resin that 70g embodiment 1 obtains, 15g carboxymethyl cellulose acetate butyrate, 35g carbon black, 30g ethylene glycol methyl ether, 0.8g N, N'-dimethylethanolamine, 45g Add ionized water, 0.7g of DISPERBYK-184, and 0.4g of BYK012 into the high-speed disperser, and stir for 2 hours at a speed of 1600rpm. Then, 0.5g of BYK380, 1.1g of water-based bentonite, and 35g of Cymel 325 were added, and stirred at a speed of 1800rpm for 7h. Then, filter with a 200-mesh filter screen to obtain an automotive water-based finish paint. The topcoat was sprayed on the sample plate coated with primer and intermediate paint, and baked at 140°C for 20min to test the performance of the paint film. The performance of automotive water-based topcoat paint and the test results of paint film are shown in Table 1.

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Abstract

The invention discloses water-based automobile finish and a preparation method thereof. The water-based automobile finish comprises the following components in parts by weight: 50-70 parts of water-based acrylate resin, 10-15 parts of carboxymethyl cellulose acetate butyrate ester, 20-35 parts of pigment, 0.2-0.5 part of water-based levelling agent, 0.1-0.4 part of water-based defoaming agent, 0.3-0.7 part of water-based moistening dispersing agent, 23-30 parts of water-based cosolvent, 0.6-1.1 parts of anti-settling agent, 30-45 parts of deionized water, 0.3-0.8 part of N,N'-dimethylethanolamine and 21-35 parts of amino resin. Compared with the traditional solvent type finish, the water-based automobile finish has the advantages that no organic solvent is contained and an obtained paint film has extremely strong adhesive force, good humidity resistance, good ageing resistance and high glossiness.

Description

technical field [0001] The invention relates to an automobile coating, in particular to a water-based automobile topcoat, and simultaneously the invention also relates to a preparation method of the above coating. Background technique [0002] Automobile topcoat is the ultimate expression of the appearance of the automobile. The smoothness, gloss, humidity and heat resistance, anti-aging, transparency and vividness of the automobile surface are directly related to the properties of the paint. Cars are exposed to the air for a long time, so the car topcoat must have excellent anti-aging performance, so as to be able to withstand the damage caused by long-term sunlight and natural changes. However, the current automotive topcoats contain a large amount of volatile organic solvents, and the release of volatile organic solvents usually causes pollution to the environment. At the same time, the current automotive topcoats still have the following technical defects: poor sun prote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/12C09D161/20C09D101/14C09D7/12
Inventor 张振久马海松高成勇
Owner CHANGCHUN SANHUA IND
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