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A kind of water-based two-component polyurethane paint for galvanized sheet and preparation method thereof

A two-component polyurethane and water-based isocyanate technology, applied in the field of coatings, can solve problems such as poor adhesion and poor weather resistance, achieve good water resistance, reduce dosage, and improve water resistance

Active Publication Date: 2021-11-30
GUANGZHOU JOINTAS CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of poor adhesion and poor weather resistance of the current galvanized sheet coating, one of the purposes of the present invention is to provide a water-based two-component polyurethane paint for galvanized sheets, and the second object of the present invention is to provide this Preparation method of water-based two-component polyurethane paint for galvanized sheet

Method used

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  • A kind of water-based two-component polyurethane paint for galvanized sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This example is a water-based two-component polyurethane coating, including A component and B component, the mass ratio of A component and B component is 8:1, and the compositions of A component and B component are as follows:

[0045] Component A includes the following components in parts by mass: 53 parts of aqueous hydroxyacrylic acid dispersion, 0.8 part of wetting and dispersing agent, 1 part of defoamer, 0.5 part of pH regulator, 6 parts of cosolvent, 25 parts of pigment and filler, 1 part of leveling agent, 1 part of thickener, 1.5 parts of adhesion promoter and 10 parts of deionized water;

[0046] B component is water-based isocyanate curing agent.

[0047] The raw materials used are described as follows:

[0048] Waterborne hydroxyacrylic acid dispersion: Antkote 2035 hydroxyacrylic acid dispersion of Yantai Wanhua Group Co., Ltd.;

[0049] Curing agent: WL72-100 from Asahi Kasei, Japan;

[0050] Wetting and dispersing agent: Digo 750w wetting and dispersin...

Embodiment 2

[0064] This example is a water-based two-component polyurethane coating, which includes component A and component B. The mass ratio of component A to component B is 8.2:1. The compositions of component A and component B are as follows:

[0065] Component A includes the following components in parts by mass: 58 parts of aqueous hydroxyacrylic acid dispersion, 0.8 part of wetting and dispersing agent, 1 part of defoamer, 0.5 part of pH regulator, 5 parts of cosolvent, 25 parts of pigment and filler, 1 part of leveling agent, 0.8 parts of thickener, 1.5 parts of adhesion promoter and 6 parts of deionized water.

[0066] B component is water-based isocyanate curing agent.

[0067] The raw materials used are described as follows:

[0068] Waterborne hydroxyacrylic acid dispersion: Antkote 2035 hydroxyacrylic acid dispersion of Yantai Wanhua Group Co., Ltd.;

[0069] Curing agent: WL72-100 from Asahi Kasei, Japan;

[0070] Wetting and dispersing agent: Digo 750w wetting and dispe...

Embodiment 3

[0084] This example is a water-based two-component polyurethane coating, including A component and B component, the mass ratio of A component and B component is 7:1, and the compositions of A component and B component are as follows:

[0085] Component A, including the following components in parts by mass: 50 parts of water-based hydroxyacrylic acid dispersion, 0.8 parts of wetting and dispersing agent, 1 part of defoamer, 0.5 parts of pH regulator, 5 parts of cosolvent, 25 parts of pigments and fillers, 1 part of leveling agent, 1 part of thickener, 1.5 parts of adhesion promoter and 14 parts of deionized water.

[0086] B component is water-based isocyanate curing agent.

[0087] The raw materials used are described as follows:

[0088] Waterborne hydroxyacrylic acid dispersion: Antkote 2035 hydroxyacrylic acid dispersion of Yantai Wanhua Group Co., Ltd.;

[0089] Curing agent: WL72-100 from Asahi Kasei, Japan;

[0090] Wetting and dispersing agent: Digo 750w wetting and...

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Abstract

The invention discloses a water-based two-component polyurethane paint for galvanized plates and a preparation method thereof. This water-based two-component polyurethane paint includes component A and component B; wherein, the mass ratio of component A to component B is (6.4-9.6): 1; component A includes the following components: water-based hydroxyl Acrylic dispersions, wetting and dispersing agents, defoamers, pH regulators, cosolvents, pigments and fillers, leveling agents, thickeners, adhesion promoters, water; wetting and dispersing agents are those containing pigment affinity groups Aqueous block copolymer solution; adhesion promoter containing reactive groups capable of reacting with hydroxyl and / or carboxyl groups in aqueous hydroxyacrylic dispersions; component B is a waterborne isocyanate curing agent. At the same time, the preparation method of the water-based two-component polyurethane paint for galvanized sheets is also disclosed. The water-based polyurethane paint disclosed by the invention has the characteristics of good adhesion to galvanized sheets, yellowing resistance, outstanding aging resistance and excellent water resistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-based two-component polyurethane paint for galvanized sheets and a preparation method thereof. Background technique [0002] As a plate with good strength and flexibility, galvanized sheet is widely used in prefabricated houses, living boxes and other fields. Since the galvanized sheet itself has a galvanized layer, its anti-corrosion performance is better, but the residential box and the prefabricated house generally need to be sprayed with a layer of paint for the sake of beauty. The coating needs to have good adhesion to the galvanized layer. Excellent weather resistance and certain water resistance. Among them, the adhesion of the coating to the galvanized layer, especially the adhesion of the coating after soaking in water is particularly critical. The lack of adhesion makes the coating easy to fall off, which directly affects the service life of the board room. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/65C09D7/63C09D7/80C08G18/62
CPCC08G18/6216C08L2205/025C08L2205/035C09D175/04C09D7/63C09D7/65C09D7/80C08L75/04C08L101/00C08K5/5435
Inventor 王建川陈剑华陈卓崔晓帆余飞
Owner GUANGZHOU JOINTAS CHEM