Normal-temperature quick-drying aqueous hydroxy acrylic resin and its preparation method and application

A hydroxy acrylic, water-based technology, applied in coatings, polyurea/polyurethane coatings, etc., to achieve the effect of improving vividness, low cost and high gloss

Inactive Publication Date: 2012-08-08
汤汉良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Today's low-temperature curing two-component acrylic polyurethane coatings play an important role in automotive solid color paints due to their excellent durability, weather resistance, high gloss and scratch resistance. However, this system generally needs to be baked at 70°C for 30 It takes ~40min to carry out polishing treatment. If the power consumption of this process is converted into coal consumption, it is equivalent to 300 million tons of standard coal

Method used

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  • Normal-temperature quick-drying aqueous hydroxy acrylic resin and its preparation method and application
  • Normal-temperature quick-drying aqueous hydroxy acrylic resin and its preparation method and application
  • Normal-temperature quick-drying aqueous hydroxy acrylic resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1 - Product Example

[0079] In the reactor equipped with stirring paddle, thermometer and condenser, add 45 parts by weight of dipropylene glycol monomethyl ether, feed nitrogen to raise the temperature to reflux temperature; add 12 parts by weight of methyl methacrylate dropwise at this temperature , 21 parts by weight of hydroxyethyl methacrylate, 5 to 10 parts by weight of methacrylic acid, 1 to 15 parts by weight of styrene, 1 part by weight of azobisisobutyronitrile and 0.5 parts by weight of mercaptoethanol The mixed solution is added dropwise within 4 hours, kept warm for 0.5~1h, then added 1 part by weight of azobisisobutyronitrile, kept warm for 2h, to obtain the acrylic resin prepolymer; the hydroxyl group obtained in the above step A Part of the solvent is removed by vacuum distillation of the acrylic resin, so that the content of the solvent in the resin is 5%. up to 80%, the neutralization reaction is carried out at 2500r / min under the high-speed ...

Embodiment 2

[0080] Example 2 - Use of the product (application example)

[0081] Get the water-based hydroxyacrylic resin prepared in Example 1, add leveling agent, defoamer, water, pigment, multifunctional auxiliary agent and optional thickener to it, obtain component A, wherein the addition of each component The amount is as follows (100 parts by weight of water-based hydroxyacrylic resin):

[0082] Waterborne hydroxy acrylic resin: 100

[0083] Leveling agent (BYK346 from BYK): 1~5

[0084] Defoamer (BYK028 from BYK): 0.2~1, preferably 0.2~0.6

[0085] Thickener (Borchi Gel PW-25 from Borchers, Germany): 0~0.8, preferably 0.2~0.5

[0086] Pigment (imported rutile titanium dioxide (after mixing, grind to a fineness of 10 microns)): 0~75, preferably 10~74

[0087] Multifunctional additives (BYK’s BYK 191 water-based dispersant, BYK’s BYK WS leveling agent, BYK’s BYK 022 defoamer, BYK’s 0622 polyurethane thickener, propylene glycol methyl ether acetate PMA co-solvent, BCS anti-white ...

Embodiment 7

[0092] Same as Example 6, except that the leveling agent addition in component A is 3 parts by weight of the water-based hydroxyacrylic resin weight, the defoamer addition is 0.4 parts by weight, no thickener is added, and the multifunctional auxiliary agent addition is 0.5 parts by weight, the added amount of water is 45 parts by weight, the ratio of component A to component B is A:B=1.5:1, and the added amount of pigment is 0 parts by weight.

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PUM

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Abstract

The invention relates to a normal-temperature quick-drying aqueous hydroxy acrylic resin, specifically to a quick-drying aqueous automobile repairing solid color paint prepared from an aqueous hydroxy acrylic resin. The invention discloses a preparation method of the aqueous hydroxy acrylic resin, a preparation of a hydroxy acrylic resin prepolymer and water-borne modification of the hydroxy acrylic resin prepolymer, and a method for preparing the quick-drying aqueous automobile repairing solid color paint by the use of the above dispersion. According to the invention, the coating process is completed at normal temperature, VOC discharge during the automobile coating process is reduced, production efficiency is raised, vehicle delivery time is shortened, and the resin is convenient for popularization and application.

Description

technical field [0001] The invention relates to an automobile paint, in particular to a normal-temperature fast-drying automobile solid-color paint prepared from a water-based hydroxyl acrylic resin. Background technique [0002] Today's low-temperature curing two-component acrylic polyurethane coatings play an important role in automotive solid color paints due to their excellent durability, weather resistance, high gloss and scratch resistance. However, this system generally needs to be baked at 70°C for 30 It takes ~40min to carry out polishing treatment. If the power consumption of this process is converted into coal consumption, it is equivalent to 300 million tons of standard coal. If it is possible to achieve lower temperature and shorter baking time for polishing, it will greatly save energy consumption, and at the same time improve production efficiency and shorten delivery time. Contents of the invention [0003] In order to overcome the deficiencies of the curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/28C08F220/14C08F220/06C08F212/08C08F8/44C09D175/04C09D7/12C08G18/62
Inventor 汤汉良刘彤舟李树伟罗晖陆善庆李金旗
Owner 汤汉良
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