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Water-based two-pack polyurethane preservative coating and preparation method thereof

A water-based two-component, anti-corrosion coating technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., to achieve the effect of good physical and mechanical properties, excellent weather resistance, and fast hardening speed

Active Publication Date: 2010-05-05
JIANGSU LANLING POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most polyurethane coatings are still mainly solvent-based. Water-based polyurethane coatings are firstly applied in the surface decoration of wooden furniture and leather finishing in China. Most of the products are varnishes, and paint products are still rare. The proportion of polyurethane coatings is less than 10%, while water-based polyurethane coatings in some developed countries in Europe and the United States account for more than 30% of the total polyurethane coatings. Therefore, there is still a big gap between my country's water-based polyurethane coatings and foreign developed countries.

Method used

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  • Water-based two-pack polyurethane preservative coating and preparation method thereof
  • Water-based two-pack polyurethane preservative coating and preparation method thereof
  • Water-based two-pack polyurethane preservative coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A. Paint (Part A): Add 40.5g of water into the batching tank according to the raw material names and proportions listed in Table 3, and add 7.0g of dispersant, 3.0g of defoamer, and antiseptic in the tank under stirring. 0.5g, paint film antifungal agent 1.0g, flash rust inhibitor 2.0g, wetting agent 1.0g, leveling agent 1.0g, stir evenly, add 2.5g of pH regulator, adjust the pH value of the system to 8.0~9.0 , add imported rutile titanium dioxide, stir and mix well, then pump the material into the grinder for grinding, when the slurry fineness is ≤50μm, add 690.0g of A-145 emulsion, 20.0g of modified resin, and stir slowly and uniformly Add 35.0g of film-forming aid, 3.0g of antifreeze, add 12.0g of thickener according to the viscosity requirements of the paint, filter with 80-100 mesh screen when the product quality index reaches the standard requirements, and obtain the paint (component A) after packaging ).

[0033] B. Add 203.0g of 304 curing agent into the batchi...

Embodiment 2-6

[0036] Adopt the same method as Example 1 to prepare water-based two-component polyurethane anticorrosion coating component A and component B, and the respective weighing and proportioning of the raw materials used in Examples 2-6 are shown in Table 3 and Table 4.

[0037] The aqueous self-emulsifying acrylate dispersion used in Examples 1-6 has a solid content of 45±2%, and a -OH percentage of about 3.3%.

[0038] table 5

[0039]

[0040]As can be seen from Table 4, the artificial accelerated aging index of the water-based two-component polyurethane anti-corrosion coating of the present invention reaches more than 1000h, surpassing the 800h artificial acceleration of the long-acting topcoat stipulated in the industry standard HG / T3656-1999 "Steel Structure Bridge" indicator requirements. The conventional performance index of paint film also meets the technical requirements of solvent-based polyurethane paint. The anticorrosion performance meets the general requirements....

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Abstract

The invention relates to the preservative coating technology, in particular to a water-based two-pack polyurethane preservative coating and a preparation method thereof. The water-based two-pack polyurethane preservative coating comprises two parts, namely paint vehicle and curing agent, wherein the paint vehicle is prepared from water-based hydroxylated acrylic dispersion, modified resin, pigment, filler, additive and water, the curing agent part comprises hydrophilic aliphatic isocyanate, dodecyl ester and propylene glycol methyl ether acetate. When using the coating of the invention, the weight ratio of the paint vehicle to the curing agent is 74-85:15-26 and the coating can solve the defects of the existing preservative coating.

Description

technical field [0001] The invention relates to anticorrosion paint technology, in particular to a water-based two-component anticorrosion paint and a preparation method thereof. Background technique [0002] In order to purify the living environment of human beings, the strict restrictions on the content of volatile organic compounds (VOC) in coating systems by the environmental protection laws of various countries have promoted the development of low-pollution coatings represented by water-based coatings. Since Bayer first created the aliphatic isocyanate curing agent in 1985, polyurethane coatings around the world have developed rapidly. Polyurethane coatings can be widely used in surface decoration of leather, furniture, automobiles, aircraft, and various steel structures. At present, most polyurethane coatings are still mainly solvent-based. Water-based polyurethane coatings are firstly applied in the surface decoration of wooden furniture and leather finishing in China...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D5/08
Inventor 陈建刚胡志英陈亚娟符世一徐宏
Owner JIANGSU LANLING POLYMER MATERIAL CO LTD
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