Aqueous two-component polyurethane topcoat coating and preparation method thereof

A polyurethane topcoat, water-based two-component technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor aging resistance of coatings, achieve good water resistance, improve aging resistance, and reduce human injury. Effect

Active Publication Date: 2017-02-15
AVIC BIAM NEW MATERIALS TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above coatings have poor aging resistance and are not suitable for topcoats in metal, concrete and other fields

Method used

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  • Aqueous two-component polyurethane topcoat coating and preparation method thereof
  • Aqueous two-component polyurethane topcoat coating and preparation method thereof
  • Aqueous two-component polyurethane topcoat coating and preparation method thereof

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preparation example Construction

[0079] (1) The preparation method of component A: water-based hydroxyl polyacrylate dispersion, water-based anionic polyacrylate dispersion, defoamer, leveling agent, wetting and dispersing agent, anti-sag additive, adhesion promoter Blend the agent and water and stir for 10 minutes; then add titanium dioxide and volume filler and stir at high speed for 35 minutes; add the bio-environmental protection antiseptic filler together with titanium dioxide and filler.

[0080] (2) The preparation method of component B: add the solvent into the hydrophilic modified aliphatic polyisocyanate curing agent, and fully stir evenly. When the water-based polyurethane coating of the present invention is used, component A and component B are mixed in a mass ratio of 4:1 and then applied.

[0081] Performance Testing:

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Abstract

The invention relates to an aqueous two-component polyurethane topcoat coating, which consists of a component A and a component B. The component A comprises the following raw materials in weight part: 15-32 parts of aqueous hydroxyl polyacrylate dispersoids, 12-30 parts of aqueous anionic polyacrylate dispersoids, 0.02-2 parts of antifoaming agent, 0.5-3 parts of leveling agent, 1-5 parts of wetting and dispersing agent, 0.2-4 parts of anti-sagging auxiliary agent, 0.3-1.5 parts of adhesion accelerant, 1-3 parts of anti-aging agent, 12-20 parts of ultraviolet-resistant filler, 10-20 parts of volume filler, and 8-30 parts of water. The component B comprises the following raw materials in weight part: 60-80 parts of hydrophilically modified aliphatic polyisocyanate curing agent and 20-40 parts of solvent. The topcoat coating is safe and environment-friendly, and the paint film thereof is smooth in appearance. Meanwhile, the aqueous two-component polyurethane topcoat coating is excellent in corrosion resistance and aging resistance, and simple in preparation method.

Description

technical field [0001] The invention belongs to the technical field of environmental protection coatings, in particular to a water-based two-component polyurethane topcoat coating and a preparation method thereof. Background technique [0002] Water-based polyurethane coatings have excellent anti-corrosion and weather resistance, and are often used for the protection of metal, concrete and other surfaces. However, in order to obtain excellent anti-corrosion performance, a large amount of iron red, medium chrome yellow and other anti-corrosion properties are often added to the coating system. Fillers that are harmful to the human body cause great harm to the environment and the human body during the coating construction and production process. [0003] Water-based acrylic polyurethane topcoats mostly use isocyanate as a curing agent. During the curing process, isocyanate reacts with water to easily generate carbon dioxide gas, which causes paint film defects. [0004] In the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C08G18/62
CPCC08G18/6229C08L2205/02C08L2205/025C08L2205/035C09D7/61C09D7/63C09D7/65C09D175/04C08L83/12C08L75/04C08K13/02C08K5/544C08K3/34C08K5/098C08K5/52C08K2003/3045C08L83/04C08L71/02
Inventor 魏薇师华杨振波刘伟沙金韩斌任春玲崔晓黎
Owner AVIC BIAM NEW MATERIALS TECH ENG
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