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Waterborne polyurethane modified epoxy steel structure anti-corrosive paint and preparation method thereof

A water-based polyurethane and anti-corrosion coating technology, applied in the coating field, can solve the problems of poor anti-aging, anti-pulverizing performance and insufficient flexibility, and achieve the effects of low price, improved safety and excellent adhesion

Inactive Publication Date: 2012-02-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, people also found that water-based epoxy resin still has some shortcomings, such as insufficient flexibility of the film, poor aging resistance, and poor anti-powdering performance.

Method used

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  • Waterborne polyurethane modified epoxy steel structure anti-corrosive paint and preparation method thereof
  • Waterborne polyurethane modified epoxy steel structure anti-corrosive paint and preparation method thereof
  • Waterborne polyurethane modified epoxy steel structure anti-corrosive paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take the following raw materials by weight unit: water-based polyurethane modified epoxy emulsion 25; precipitated barium sulfate 10; antirust pigment 22; talc powder 8; defoamer 1; dispersant 2.5; , water 18. The leveling agent is BYK346, the dispersant is AFCONA-4560, the anti-flash rust agent is raybo75, and the defoamer is Defom W-0505.

[0035] Under high-speed stirring, sequentially mix zinc powder, anti-rust pigment, talcum powder, anti-flash rust agent, dispersant and water into the water-based polyurethane modified epoxy emulsion and add half of the defoamer to disperse the pigment to 50 mesh Next, at a stirring rate of 300r / min-500r / min, add the other half of defoamer and leveling agent and other additives. Stir evenly, and obtain A component after filtration.

[0036] A water-based dispersion was prepared after capping and addition of polyacrylamide and emulsifying with a reactive emulsifier. Mix 7 g of the dispersion with 4 g of water to form group B.

[...

Embodiment 2

[0048] Weigh the following raw materials by weight unit: water-based polyurethane modified epoxy emulsion 35; precipitated barium sulfate 7; antirust pigment 16; talcum powder 4; defoamer 0.3; dispersant 1.5; ; water 15. The leveling agent is BYK346, the dispersant is AFCONA-4550 and AFCONA-5071, the anti-flash rust agent is raybo75, and the defoamer is DefomW-092.

[0049] Under high-speed stirring, sequentially mix precipitated barium sulfate, anti-rust pigment, talc powder, anti-flash rust agent, dispersant and water into the water-based polyurethane modified epoxy emulsion and add half of the defoamer to disperse the pigment to 50 Under the mesh, then add the other half of defoamer and leveling agent and other additives at a stirring speed of 300r / min-500r / min. Stir evenly, and obtain A component after filtration.

[0050] After capping and addition, emulsify with a reactive emulsifier to prepare a water-based dispersion. Mix 10 g of the dispersion with 10 water to form ...

Embodiment 3

[0062] Weigh the following raw materials by weight unit: water-based polyurethane modified epoxy emulsion 45; precipitated barium sulfate 6; antirust pigment 12; talcum powder 4; defoamer 0.3; dispersant 1.5; ; water 10. The leveling agent is BYK346, the dispersant is AFCONA-4550 and AFCONA-5071, the anti-flash rust agent is raybo75, and the defoamer is DefomW-092.

[0063] Under high-speed stirring, sequentially mix precipitated barium sulfate, anti-rust pigment, talc powder, anti-flash rust agent, dispersant and water into the water-based polyurethane modified epoxy emulsion and add half of the defoamer to disperse the pigment to 100 Mesh below, and then at 300r / min-500r / min stirring speed, add the other half of defoamer and leveling agent and other additives. Stir evenly, and obtain A component after filtration.

[0064] A water-based dispersion was prepared after capping and addition of polyacrylamide and emulsifying with a reactive emulsifier. 13 g of the dispersion was...

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Abstract

The invention belongs to the paint technical field, in particular relates to a waterborne polyurethane modified epoxy steel structure anti-corrosive paint and a preparation method thereof. The component A of the paint is a dispersion of modified E-20 and the component B used as curing agent is a waterborne dispersion which is prepared through modification by using epoxy and hydrophilic groups. The system has the advantages of common waterborne paints, overcomes the defects of the waterborne epoxy anti-corrosive paint and has the advantages of polyurethane and epoxy materials. The waterborne epoxy anti-corrosive paint prepared by using the system as the base material has great development prospect in the field of steel structures such as bridges, pipes, containers, industrial plants and public facilities.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a water-based polyurethane modified epoxy steel structure anticorrosion coating and a preparation method thereof. Background technique [0002] With the increasingly stringent requirements of environmental protection, the research of low VOC or zero VOC and its HAPs (hazardous air pollution) water-based coatings, in order to develop new products that meet the needs of the market, is an important development direction of coatings. [0003] When water-based epoxy resin is used as a coating for steel structures, wood and other substrates, it has high hardness and tensile strength after curing, high gloss of the coating film, good adhesion to various substrates, excellent chemical resistance, and electrical insulation. With the advantages of good performance, various varieties, low price and easy availability, it has been widely used in the coating field of various steel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D175/04C09D5/08
Inventor 任天斌蒋志恒黄超钟震钱志国韩宇
Owner TONGJI UNIV
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