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Environment-friendly water-based bi-component polyurethane steel-structure anti-corrosion finish paint and preparation method

A two-component polyurethane, environmentally friendly technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of poor water resistance, low hardness and gloss, and achieve improved safety, excellent adhesion, Strong acid and alkali resistance

Inactive Publication Date: 2012-07-25
SHANGHAI MAMPLE 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 provide an environment-friendly water-based two-component polyurethane steel structure anti-corrosion finish paint and its preparation method, which mainly solves the technical problems of poor water resistance, low hardness and glossiness of existing water-based polyurethane coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0040] The following raw materials were weighed by weight unit: 58 parts by weight of aqueous resin emulsion containing hydroxyl, 33 parts by weight of titanium dioxide, 2 parts by weight of defoamer, 1 part by weight of dispersant, and 10 parts by weight of water. R-930 is used for titanium dioxide, BYK-028 is used for defoamer, and BYK-190 is used for dispersant.

[0041] Under stirring at 1000-1500r / min, sequentially mix titanium dioxide, dispersant and water into 58 parts by weight of hydroxyl-containing water-based resin emulsion, and add 2 parts by weight of defoamer to disperse the pigment to below 20 microns, and then Add 1 part by weight of wetting agent at a stirring speed of 300r / min-500r / min, and the wetting agent is BYK-345. Stir evenly, and obtain A component after filtration.

[0042] At a stirring speed of 300r / min-500r / min, add 80 parts by weight of curing agent (the weight ratio of self-emulsifying polyisocyanate to hydrophobic polyisocyanate is 4:1) into 20...

Embodiment 2

[0059] The following raw materials were weighed by weight unit: 58 parts by weight of aqueous resin emulsion containing hydroxyl group, 33 parts by weight of titanium dioxide, 3 parts by weight of carbon black, 1 part by weight of defoamer, 0.5 part by weight of dispersant, and 17 parts by weight of water. R-930 is used for titanium dioxide, BYK-028 is used for defoamer, and BYK-190 is used for dispersant.

[0060] Under stirring at 1000-1500r / min, sequentially mix titanium dioxide, carbon black, dispersant and water into 58 parts by weight of hydroxyl-containing water-based resin emulsion, and add 1 part by weight of defoamer to disperse the pigment to below 20 microns , and then add 0.5 parts by weight of wetting agent at a stirring rate of 300r / min-500r / min, and the wetting agent is BYK-345. Stir evenly, and obtain A component after filtration.

[0061] Add 82 parts by weight of curing agent (the weight ratio of self-emulsifying polyisocyanate and hydrophobic polyisocyanat...

Embodiment 3

[0078] Weigh the following raw materials by weight unit: 55 parts by weight of aqueous resin emulsion containing hydroxyl group, 27 parts by weight of titanium dioxide, 2 parts by weight of Pulan, 1 part by weight of defoamer, 1 part by weight of dispersant, and 10 parts by weight of water. R-930 is used for titanium dioxide, BYK-028 is used for defoamer, and BYK-190 is used for dispersant.

[0079] Under stirring at 1000-1500r / min, sequentially mix titanium dioxide, blue, dispersant and water into 55 parts by weight of hydroxyl-containing water-based resin emulsion, and add 1 part by weight of defoamer to disperse the pigment to below 20 microns , and then add 0.5 parts by weight of wetting agent at a stirring rate of 300r / min-500r / min, and the wetting agent is BYK-345. Stir evenly, and obtain A component after filtration.

[0080] At a stirring speed of 300r / min-500r / min, add 80 parts by weight of curing agent (the weight ratio of self-emulsifying polyisocyanate to hydropho...

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Abstract

The invention provides environment-friendly water-based bi-component polyurethane steel-structure anti-corrosion finish paint and a preparation method. The anti-corrosion finish paint comprises a component A and a component B, wherein the component A comprises, by weight, 55-58 parts of hydroxyl water-based resin emulsion, 27-33 parts of titanium oxide, 0-2 parts of Prussian blue, 0-3 parts of carbon black, 1-2 parts of defoamer, 0.5-1 part of dispersing agent, 0.5-1 part of wetting agent and 10-17 parts of water; the component B comprises, by weight, 80-82 parts of curing agent and 18-20 parts of cosolvent; and the two components are mixed in the weight proportion of 4.4:1. The anti-corrosion finish paint is highly waterproof, high in hardness and glossiness and full in color, has the advantages of good leveling property, high covering power, firmness in adhesion, acid-resistant and alkali-resistant coatings, safety in construction and the like, and can be widely used for steel structures of all walks of life, such as mechanical equipment, rolling stock, constructions such as departure halls, stadiums, railway station rooms, convention centers, commercial buildings, bridges and the like of steel structures, thereby having a huge market prospect.

Description

technical field [0001] The invention belongs to the technical field of industrial anticorrosion coatings, in particular to an environment-friendly water-based two-component polyurethane steel structure anticorrosion topcoat and a preparation method thereof. Background technique [0002] With the increasingly stringent requirements for environmental protection, the research on water-based coatings with low or zero VOC and low or zero HAPs (hazardous air pollution) has become the focus and an important development direction of coatings. [0003] At present, in the supporting system of anti-corrosion coatings for steel structures in China, organic products are basically used for the top coat. The volatilization of organic solvents can easily lead to construction safety problems, and the emission of VOC affects the living environment of human beings. With the strengthening of the awareness of global environmental protection, people vigorously develop water-based coatings to repl...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D5/08C09D7/12
Inventor 王振华陆为平徐英
Owner SHANGHAI MAMPLE NEW MATERIAL
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