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Waterborne polyester modified epoxy polyurethane anticorrosive paint and preparation method thereof

A technology of epoxy polyurethane and water-based polyester, applied in the field of coatings, can solve the problems of limited use in the field of anti-corrosion, insufficient anti-corrosion performance, slow curing speed, etc., and achieve the effects of low cost, slow down corrosion reaction, and low VOC content

Inactive Publication Date: 2011-06-29
SHENZHEN ZHONGKE LITAO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional two-component water-based epoxy resin anti-corrosion coatings are generally cured with water-based amine curing agents, which use the active hydrogen atoms on the amine curing agent to react with the epoxy groups in the epoxy resin to form a film. , its disadvantage is that the curing speed is very slow or not cured under low temperature conditions, which limits its use in the field of anti-corrosion
The water-based polyisocyanate curing agent component is currently mainly used in water-based acrylic, polyester and other systems, and its anti-corrosion performance is not outstanding enough.

Method used

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  • Waterborne polyester modified epoxy polyurethane anticorrosive paint and preparation method thereof
  • Waterborne polyester modified epoxy polyurethane anticorrosive paint and preparation method thereof
  • Waterborne polyester modified epoxy polyurethane anticorrosive paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Weigh the following raw materials by weight: 25 water-based polyester modified epoxy resin dispersions; 12 iron oxide red; 10 zinc phosphate; 8 aluminum tripolyphosphate; 5 talcum powder; 5 barium sulfate; dispersant (BYK 190) 2 ; Defoamer (BYK019) 1; Leveling agent (BYK 346) 1; Thickener water-based bentonite 1.0; Drier (containing 1% T-12) 1.0; Anti-flash rust agent (RAYBO 60) 0.5; Cosolvent Propylene Glycol Methyl Ether Acetate 2.0; Deionized Water 20 (prepared according to the following method and packaged separately, namely A component, the same below); curing agent component water-based isocyanate dispersion (ie B component, separately packaged, the same below) .

[0061] Under the stirring condition of 300r / m-500r / m, add the dispersant, co-solvent, thickener, half of the defoamer, and water-based polyester modified epoxy dispersion to half of the deionized water in turn, and stir for 5 minute. Under the stirring condition of 800r / m-1500r / m, add anti-rust pigmen...

Embodiment 2

[0066] Weigh the following raw materials according to weight ratio: water-based polyester modified epoxy resin dispersion 25; anatase titanium dioxide 12; zinc chrome yellow 8; talcum powder 15; barium sulfate 5; dispersant (BYK 190) 1; defoaming agent (BYK 019) 0.8; leveling agent (BYK 346) 0.8; thickener water-based bentonite 0.8; drier (containing 1% T-12) 1; anti-flash rust agent (RAYBO 60) 0.5; cosolvent propylene glycol methyl Ether acetate 3.5; deionized water 15; curing agent component aqueous isocyanate dispersion.

[0067] Under the stirring condition of 300r / m-500r / m, add the dispersant, co-solvent, thickener, half of the defoamer, and water-based polyester modified epoxy dispersion into 2 / 3 deionized water in turn, and stir 10 minutes. Under the stirring condition of 800r / m-1500r / m, add anti-rust pigment and filler in turn, disperse for 30 minutes and grind until the fineness is below 50 microns. Then, under the stirring condition of 300r / m-500r / m, add leveling a...

Embodiment 3

[0073] Weigh the following raw materials by weight: water-based polyester modified epoxy resin dispersion 30; anatase titanium dioxide 12; zinc phosphate 7; aluminum tripolyphosphate 8; talcum powder 3; barium sulfate 4; dispersant (BYK 190 ) 1.5; defoamer (BYK 019) 0.6; leveling agent BYK 3460.5; thickener water-based bentonite 0.6; drier (containing 1% T-12) 1.5; anti-flash rust agent (RAYBO 60) 0.6; cosolvent Propylene glycol methyl ether acetate 4; deionized water 13; curing agent component aqueous isocyanate dispersion.

[0074] Under the stirring condition of 300r / m-500r / m, sequentially add the dispersant, co-solvent, thickener, half of the defoamer and water-based polyester modified epoxy dispersion into the deionized water, and stir for 20 minutes. Under the stirring condition of 800r / m-1500r / m, add anti-rust pigment and filler in turn, disperse for 40 minutes and grind until the fineness is below 50 microns. Then, under the stirring condition of 300r / m-500r / m, add le...

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Abstract

The invention relates to a waterborne polyester modified epoxy polyurethane anticorrosive paint and a preparation method thereof. The preparation method of the paint is as follows: a component A is composed of 25-50 parts by weight of waterborne polyester modified epoxy dispersion and other raw materials, a component B is composed of waterborne polyisocyanates dispersion, the component A and the component B are mixed in a ratio range of 7:1-3:1 to form the main film-forming material; 0-30 parts by weight of rustproof pigment, 0-20 parts by weight of coloring pigment and 5-20 parts by weight of filler are further added. The paint of the invention has the advantages similar to that of the common waterborne paint, overcomes some defects of the waterborne anticorrosive paint, combines the advantages of polyester paint, epoxy paint and polyurethane paint, has excellent low temperature fast curing property, oil resistance, chemical medium and anticorrosive properties and has wide application prospect in various steel structure fields such as bridges, pipes, storage tanks and industrial factory buildings.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a water-based polyester modified epoxy polyurethane anticorrosion coating and a preparation method thereof. Background technique [0002] Traditional anti-corrosion coatings are mostly solvent-based coatings. In order to facilitate production and construction, a large amount of organic solvents are often added. During the production and construction process, these solvents volatilize into the atmosphere, resulting in a waste of resources, and at the same time causing harm to the health of construction workers and seriously polluting the environment. With the improvement of human environmental protection awareness, the requirements for environmental protection are becoming increasingly stringent, and the development of environmentally friendly coatings with low VOC or even zero VOC is an inevitable development direction of coatings. [0003] Epoxy resin paint has mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C09D5/08
Inventor 张孝和李丽霞孙伟平
Owner SHENZHEN ZHONGKE LITAO TECH
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