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Method for preparing waterborne resin, and waterborne coating composition

A technology of water-based resin and water-based paint, applied in the field of paint, can solve the problem that water-based paint can not meet the anti-corrosion, chemical resistance, solvent resistance and other properties at the same time, and achieve the effect of excellent anti-corrosion, excellent weather resistance and harm reduction.

Active Publication Date: 2011-05-18
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this water-based automotive paint only improves the fullness and gloss of the paint surface of the water-based paint, and cannot meet the overall requirements of the water-based paint for anti-corrosion, chemical resistance, solvent resistance, and aging resistance. There is a big gap compared with the coating

Method used

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  • Method for preparing waterborne resin, and waterborne coating composition
  • Method for preparing waterborne resin, and waterborne coating composition
  • Method for preparing waterborne resin, and waterborne coating composition

Examples

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preparation example Construction

[0030] The invention discloses a preparation method of water-based resin, comprising the following steps:

[0031] Step a) Under nitrogen protection, 342-500 parts by weight of alkene diacid, 167-270 parts by weight of tricarboxylic acid, 74-146 parts by weight of dihydric alcohol, 375-431 parts by weight of dimethylol propionic acid, 78- 138 parts by weight of glycidyl tertiary carbonic acid ester, 90-250 parts by weight of epoxy resin, 10-30 parts by weight of antioxidant and 30-50 parts by weight of catalyst are heated to 130-215 °C for reaction, adding an aqueous solvent to obtain the first product;

[0032] Step b) under the protection of nitrogen, add 815-1100 parts by weight of reactive monomers, 6.9-9.2 parts by weight of free radical initiators and 8-15 parts by weight of chain transfer agents to the first product, and carry out free-radical polymerization to obtain The second product, the reactive monomers are methacrylic acid, styrene, hydroxy acrylate and acrylate...

Embodiment 1

[0054] Preparation of water-based resin P1:

[0055] According to the formula quantity shown in table 1, prepare according to the following method:

[0056] Step a) Under nitrogen protection, add glutaconedic acid, 2-phosphinobutane-1,2,4-tricarboxylic acid, 1,8-octanedioic acid to the device equipped with water separator, thermometer and condenser Diol, dimethylolpropionic acid, glycidyl ester E10P, epoxy resin E51, heated up to 170°C, reacted for 2 hours, then raised the temperature to 210°C at a heating rate of 10°C / 20min, continued to react for 3 hours, then Cool down to 130°C, add an aqueous solvent to obtain the first product;

[0057] Step b) Under nitrogen protection, add methacrylic acid, hydroxyethyl acrylate, butyl acrylate, and styrene to the first product, raise the temperature to 110°C, add the initiator benzoyl peroxide in 3 batches, and continue the reaction for 4 hours , adding the chain transfer agent dodecyl mercaptan, and reacting at 120°C for 1 hour to o...

Embodiment 2～5

[0064] The preparation process of water-based resins P2-P5 is the same as in Example 1, and the specific process parameters are shown in Table 1.

[0065] Table 1 The raw material formula of the water-based resin prepared in Examples 1-5

[0066]

[0067]

[0068]

[0069] Table 2 Group structures in Examples 1 to 5

[0070]

[0071] n

[0072]

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PUM

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Abstract

The embodiment of the invention discloses a method for preparing waterborne resin, and a waterborne coating composition. A main chain structure of the waterborne resin prepared by the method comprises an epoxy resin group, an acrylic resin group and a polyurethane group. In the waterborne coating composition, the waterborne resin of which the main chain structure comprises the epoxy resin group, the acrylic resin group and the polyurethane group is used as main forming resin, wherein the epoxy resin group structure provides excellent corrosion resistance; and the acrylic resin group structureand the polyurethane group structure guarantees excellent weather resistance, chemical resistance and gloss and color retention, so the waterborne coating composition has excellent comprehensive properties. The waterborne resin is non-toxic and harmless, so the damage to the environment caused by the volatilization of an organic solvent is reduced and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of coatings, and more specifically, relates to a preparation method of a water-based resin and a water-based coating composition. Background technique [0002] Solvent-based paint is a paint that uses organic solvents as the dispersion medium, and is a commonly used automotive paint. Publication number is that the Chinese patent literature of CN 1130202A and the U.S. patent literature that the patent number is US5288865 have reported a kind of solvent type automobile paint, and this solvent type automobile paint is film-forming resin with hydroxyl acrylic resin, alkyd resin, polyester resin, with Amino resins and polyisocyanates are prepared as crosslinking agents. The Chinese patent literature with the publication number CN 1386800A reports a solvent-based nano-coating, which has excellent scratch resistance, high hardness, and abrasion resistance, and is an important automotive coating. However, the solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/46C08G18/42C08G63/692C08G63/676C08F283/01C09D175/06
Inventor 张红明吕金龙李季王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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