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Water-based DTM polyurethane coating and preparation method thereof

A polyurethane coating and water-based isocyanate technology, applied in the field of coatings, can solve the problems of little research on water-based DTM polyurethane coatings, and achieve the effects of reducing critical current density, avoiding side reactions, and improving corrosion resistance

Active Publication Date: 2020-07-10
石家庄市油漆厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current research on waterborne polyurethane coatings is the research on supporting systems, and there is little research on waterborne DTM polyurethane coatings.

Method used

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  • Water-based DTM polyurethane coating and preparation method thereof
  • Water-based DTM polyurethane coating and preparation method thereof
  • Water-based DTM polyurethane coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of water-based DTM polyurethane coating, comprises A component and B component, and A component comprises the component of following mass fraction: Hydroxyl acrylic acid dispersion 2035 (hydroxyl value 100mg KOH / g) is 50 parts; R298 titanium dioxide is 18 parts; modified zinc phosphate PZ20 is 4 parts; aluminum zinc phosphate ZPA is 4 parts; precipitated barium sulfate is 8 parts; 1.5 parts for 142DA; 0.8 parts for anti-flash rust additive FA179; 1.5 parts for dispersant BYK-190; 0.3 parts for defoamer BYK-024; 1 part for wetting and leveling agent TEGO 4100; thickener RHEOLATE 299 is 0.2 parts; 4 parts of dipropylene glycol methyl ether; 6.7 parts of deionized water, component B includes 16 parts of Aquolin268 water-based isocyanate curing agent (NCO content is 14%), and the NCO / OH molar ratio is 1.4.

[0027] The preparation method of above-mentioned waterborne DTM polyurethane paint, comprises the following steps:

[0028] S1: Mix the above deionized water ...

Embodiment 2

[0032] A kind of water-based DTM polyurethane coating, comprises A component and B component, and A component comprises the component of following mass fraction: Hydroxyl acrylic acid dispersion 2470 (hydroxyl value 120mg KOH / g) is 60 parts; R298 titanium dioxide is 15 parts; modified zinc phosphate PZ20 is 3 parts; aluminum zinc phosphate ZPA is 3 parts; precipitated barium sulfate is 5 parts; 1 part of 142DA; 0.5 part of anti-flash rust additive FA179; 1 part of dispersant BYK-190; 0.3 part of defoamer BYK-024; 0.5 part of wetting and leveling agent TEGO4100; thickener RHEOLATE 299 0.5 parts; 5 parts of dipropylene glycol butyl ether; 5.2 parts of deionized water, component B includes 21 parts of Aquolin268 water-based isocyanate curing agent (NCO content is 14%), and the NCO / OH molar ratio is 1.3.

[0033] The preparation method of above-mentioned waterborne DTM polyurethane paint, comprises the following steps:

[0034] S1: Mix the above deionized water with dispersant ...

Embodiment 3

[0038] A kind of water-based DTM polyurethane coating, comprises A component and B component, and A component comprises the component of following mass fraction: Hydroxyl acrylic acid dispersion 2035 (hydroxyl value 100mg KOH / g) is 40 parts; R298 titanium dioxide is 20 parts; modified zinc phosphate PZ20 is 5 parts; aluminum zinc phosphate ZPA is 5 parts; precipitated barium sulfate is 10 parts; 2 parts of 142DA; 1 part of anti-flash rust additive FA179; 2 parts of dispersant BYK-190; 0.2 parts of defoamer BYK-024; 1 part of wetting and leveling agent TEGO4100; thickener RHEOLATE 299 0.3 parts; 3.5 parts of dipropylene glycol methyl ether; 10 parts of deionized water, component B includes 14 parts of Aquolin268 water-based isocyanate curing agent (NCO content is 14%), and the NCO / OH molar ratio is 1.5.

[0039] The preparation method of above-mentioned waterborne DTM polyurethane paint, comprises the following steps:

[0040] S1: Mix the above deionized water with dispersan...

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Abstract

The invention relates to the technical field of coatings, and particularly discloses a water-based DTM polyurethane coating and a preparation method thereof. The water-based DTM polyurethane coating is prepared from a component A and a component B. The component A is prepared from, by mass, 40-60 parts of hydroxyl acrylic acid dispersion, 15-20 parts of titanium dioxide, 3-5 parts of modified zincphosphate, 3-5 parts of zinc aluminum phosphate, 5-10 parts of precipitated barium sulfate, 1-2 parts of a salt spray resistant auxiliary agent, 0.5-1 part of an anti-flash-rust auxiliary agent, 1-2parts of a dispersant, 0.2-0.4 parts of a defoaming agent, 0.5-1 part of a wetting leveling agent, 0.2-0.5 parts of a thickening agent, 2-5 parts of a coalescing agent, and 5-10 parts of deionized water. The component B is prepared from 10-25 parts of a water-based isocyanate curing agent. The coating provided by the invention is low in VOC content, has good water resistance, acid and alkali resistance, artificial aging resistance and salt spray resistance, and can meet the requirements of corrosion resistance and weather resistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-based DTM polyurethane coating and a preparation method thereof. Background technique [0002] Corrosion hazards have become a common problem faced by the whole world. In my country alone, the losses caused by corrosion in the fields of ships, rails, bridges, and pipelines amount to trillions of yuan every year. Therefore, coating protection is favored because of its strong adaptability, convenient construction, low cost, and remarkable anti-corrosion effect. Among them, polyurethane (PU) coatings not only have good wear resistance, low temperature flexibility, and ideal mechanical and chemical properties. It has been widely used in the corrosion protection of materials and has become the focus of scholars' attention and research. [0003] Water-based two-component polyurethane coatings have good protection properties, excellent decorative properties and high weather re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D175/04
CPCC08K2003/2241C08K2003/3045C08K2003/328C08L2205/02C08L2205/035C09D5/084C09D175/04C08L83/04C08L83/12C08L75/08C08K13/06C08K3/32C08K3/22C08K3/30
Inventor 王玮史永兴许利莎凌芹董亮田会社徐晓利
Owner 石家庄市油漆厂
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