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A wet-sprayable waterborne two-component polyurethane coating

A water-based two-component polyurethane coating technology, applied in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc., can solve problems such as low production efficiency and difficulty in wet spraying, and improve production efficiency , reduce excessive time, reduce the effect of production energy consumption

Active Publication Date: 2020-11-06
WUHU CHUNFENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of wet spraying and low production efficiency of water-based coatings in the prior art, and provides a wet-sprayable water-based two-component polyurethane coating, which can effectively realize the wet spraying process, thereby improving Production efficiency, reduce production energy consumption, and can be widely used in the field of coating, especially in the field of low-temperature coating that involves two-layer coating and one-baking for car bodies and related requirements.

Method used

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  • A wet-sprayable waterborne two-component polyurethane coating
  • A wet-sprayable waterborne two-component polyurethane coating
  • A wet-sprayable waterborne two-component polyurethane coating

Examples

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Effect test

Embodiment 1

[0038] like Figure 1-Figure 3 As shown, a wet sprayable water-based two-component polyurethane coating of this embodiment, the coating includes a primer and a topcoat, wherein the primer and the topcoat are both added with hydrophilic fumed silica, and the primer is The added weight part of hydrophilic fumed silica is more than the added weight part of hydrophilic fumed silica in the topcoat. Specifically, in the present embodiment, the primer includes the following raw materials by weight:

[0039]

[0040]

[0041] The preparation method of this primer in the present embodiment is as follows:

[0042] A, prepare the raw material according to the above-mentioned formula amount, stir the water-based hydroxyacrylic acid secondary dispersion under the condition of 300 rev / min, add 0.2-0.4 parts by weight pH value regulator (according to the selected secondary water-based hydroxyacrylic acid) under the stirring condition The pH value of the dispersion determines the addi...

Embodiment 2

[0057] A kind of wet-sprayable waterborne two-component polyurethane coating of the present embodiment, coating comprises primer and finish paint, is basically the same as embodiment 1, difference is, in the present embodiment, primer comprises the raw material of following weight portion:

[0058]

[0059]

[0060] The preparation method of this primer in the present embodiment is as follows:

[0061] A. Prepare the raw materials according to the above formula, stir the water-based hydroxyacrylic acid secondary dispersion at 500 rpm, and add 0.2-0.4 parts by weight of a pH regulator under stirring conditions (according to the selected water-based hydroxyacrylic acid secondary dispersion). The PH value of the dispersion determines the amount added), water-based dispersant, water-based defoamer, deionized water, antiseptic and fungicide, rutile titanium dioxide, hydrophilic fumed silica. After stirring for 12 minutes under the condition of / minute, grind to a fineness of...

Embodiment 3

[0070] A kind of wet-sprayable waterborne two-component polyurethane coating of the present embodiment, coating comprises primer and finish paint, is basically the same as embodiment 1, difference is, in the present embodiment, primer comprises the raw material of following weight portion:

[0071]

[0072] The preparation method of this primer in the present embodiment is as follows:

[0073] A. Prepare the raw materials according to the above formula, stir the water-based hydroxyacrylic acid secondary dispersion at 700 rpm, and add 0.2-0.4 parts by weight of a pH regulator under stirring conditions (according to the selected water-based hydroxyacrylic acid secondary dispersion). The PH value of the dispersion determines the amount added), water-based dispersant, water-based defoamer, deionized water, antiseptic and fungicide, rutile titanium dioxide, hydrophilic fumed silica, after adding, the mixture is turned at 1200 rpm After stirring for 15 minutes under the condition...

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Abstract

The invention discloses a wet-jet wet waterborne double-component polyurethane coating, and belongs to the field of preparation of coatings. The coating comprises primer and finishing coat, hydrophilic fumed silica are added in the primer and the finishing coat, and the parts by weight of the hydrophilic fumed silica in the primer are higher than the parts by weight of the hydrophilic fumed silicain the finishing coat. The shortcomings that in the prior art, a coating is difficult to wet by wet-jet, and the production efficiency is low are overcome, a wet-jet wet process can be realized effectively, therefore, the production efficiency is improved, the production energy consumption is reduced, the wet-jet wet waterborne double-component polyurethane coating can be widely used in the fieldof coating, and particularly, the wet-jet wet waterborne double-component polyurethane coating has good effects in the fields of automobile bodies and related low-temperature coating which requires two-layer coating and one-time baking.

Description

technical field [0001] The invention relates to the technical field of coating preparation, and more particularly, to a wet-spray-wet-water-based two-component polyurethane coating. Background technique [0002] With the strict requirements of the current national environmental protection policy, water-based low-temperature coating products with low VOC and low energy consumption came into being. It gradually replaces traditional solvent-based coatings, and is equivalent to solvent-based coatings in many aspects such as ordinary workability, gloss and fluidity. Solvent-based coatings can easily achieve wet spraying through process and formula design, and achieve two-coating and one-bake coating and baking. process, greatly reducing production energy consumption. However, in the construction of water-based coatings, it is necessary to achieve two coatings and one baking, because the physical properties of water and organic solvents in many aspects such as heat of evaporation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/63C09D5/14
CPCC08K2003/265C09D5/002C09D5/14C09D7/61C09D7/63C09D175/04C08K3/22C08K3/36C08K5/103
Inventor 殷骏郭小平
Owner WUHU CHUNFENG NEW MATERIAL
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