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Water-based two-component acrylic acid polyurethane automobile paint and preparation method thereof

An acrylic polyurethane, water-based two-component technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of reducing the storage stability of water-based resins, increasing the complexity of construction, and poor storage stability. The effect of film appearance and gloss, improving gloss and appearance, improving water resistance and resistance to other chemical media

Active Publication Date: 2011-04-20
广东德鑫翔远高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using aziridine or polycarbodiimide to react with carboxyl groups to eliminate residual carboxyl groups in the coating film is an effective method to improve the water resistance of water-based paint film, but it has poor storage stability and increases the complexity of construction; on the other hand, Minimizing the concentration of hydrophilic groups during the synthesis process is also an effective method to improve the water resistance of the coating film. This method requires special equipment and processes, and may reduce the storage stability of the water-based resin.

Method used

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  • Water-based two-component acrylic acid polyurethane automobile paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add water-based hydroxyacrylic resin, wetting agent, defoamer, thickener, coupling agent, and film-forming aid into deionized water according to the dosage of the formula, and disperse at 800RPM disperser for 15 minutes to make component A; Weigh the polyisocyanate curing agent as the B component according to the amount of the formula, and control the molar ratio of the OH group contained in the water-based hydroxyl resin in the A component to the NCO group contained in the polyisocyanate in the B component to be 1 / 2.5. Slowly add component B to component A and continue to disperse for 5 minutes. The formula of the present embodiment is composed as follows:

[0026] A component:

[0027] Polyacrylate aqueous dispersion Bayhydrol XP2651: 80%;

[0028] TEG-245: 1%;

[0029] TEGO-805: 1%;

[0030] SN-612: 1%;

[0031] Glycidylalkyltrialkoxysilane: 3%;

[0032] Dipropylene glycol methyl ether: 2%;

[0033] Propylene glycol butyl ether: 3%;

[0034] Deionized water: ...

Embodiment 2

[0046] Add water-based hydroxyacrylic resin, wetting agent, defoamer, thickener, coupling agent, and film-forming aid into deionized water according to the dosage of the formula, and disperse for 15 minutes at the speed of the disperser at 300RPM to make component A; Weigh the polyisocyanate curing agent as the B component according to the amount of the formula, and control the molar ratio of the OH group contained in the water-based hydroxyl resin in the A component to the NCO group contained in the polyisocyanate in the B component to be 1 / 0.8. Slowly add component B to component A and continue to disperse for 5 minutes. The formula of the present embodiment is composed as follows:

[0047] A component:

[0048] Waterborne hydroxyl acrylic emulsion (Bayhydrol XP2546): 95%;

[0049] BYK-346: 0.1%;

[0050] TEGO-800: 0.04%;

[0051] BYK-020: 0.06%;

[0052] RM-2020: 0.1%;

[0053] Z-6040: 0.1%;

[0054] Z-6030: 0.1%;

[0055] Dipropylene glycol methyl ether acetate: 2%...

Embodiment 3

[0064] Add water-based hydroxyacrylic resin, wetting agent, defoamer, thickener, coupling agent, and film-forming aid into deionized water according to the dosage of the formula, and disperse at 1000RPM disperser for 15 minutes to make component A; Weigh the polyisocyanate curing agent as the B component according to the amount of the formula, and control the molar ratio of the OH group contained in the water-based hydroxyl resin in the A component to the NCO group contained in the polyisocyanate in the B component to be 1 / 1.5. Slowly add component B to component A and continue to disperse for 5 minutes. The formula of the present embodiment is composed as follows:

[0065] A component:

[0066] Waterborne hydroxyacrylic dispersion (Bayhydrol XP2651): 45%;

[0067] Waterborne hydroxyl acrylic emulsion (Bayhydrol XP2546): 47%;

[0068] TEGO-500: 0.5%;

[0069] TEGO-825: 0.5%;

[0070] BYK-19: 0.1%;

[0071] SN-612: 0.1%;

[0072] RM-2020: 0.3%;

[0073] 3,4 Cyclohexylep...

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Abstract

The invention relates to a water-based two-component acrylic acid polyurethane automobile paint and a preparation method thereof. The paint is prepared from component A and component B, wherein the component A is prepared by the way that water-based hydroxyl resin, wetting agent, defoaming agent, thickening agent, coupling agent and film forming auxiliary are added into deionized water in formularatio and are dispersed for 15 minutes, the component B is poly isocyanate curing agent, the component B is weighed according to formula ratio, the component B is slowly added into the component A indispersed state, and dispersing is continuously carried out for 5 minutes, thus obtaining the paint. The water-based two-component automobile paint prepared by the invention remains the original filmhardness, medium resistance and salt fog resistance, and meanwhile VOC (volatile organic component) content is greatly reduced, so that the paint can be widely applied to water-based automobile paintindustry and has great industrial application value and market prospect.

Description

technical field [0001] The invention relates to a water-based two-component automotive coating and a preparation method thereof, in particular to a coating in which acrylic polyurethane is applied to the water-based two-component automotive coating and a preparation method thereof. Background technique [0002] With the enhancement of environmental awareness and the improvement of environmental regulations, the use of volatile organic compounds (VOC) and harmful air pollutants (HAP) in traditional solvent-based coatings has become more and more restricted, and water-based coatings have attracted more and more attention. . One-component waterborne polyurethane coatings are difficult to compete with solvent-based coatings. Two-component waterborne polyurethane coatings have high performance and multiple functions, and can meet the needs of high-end coatings. They are the development direction and research hotspot of waterborne coatings. [0003] The two-component waterborne p...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/12
Inventor 邓荫
Owner 广东德鑫翔远高新材料有限公司
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