A kind of waterborne two-component polyurethane primer coating and preparation method thereof
A polyurethane primer, water-based two-component technology, used in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve problems such as poor anti-corrosion performance, and achieve the effect of good compactness and less human injury
Active Publication Date: 2020-02-11
AVIC BIAM NEW MATERIALS TECH ENG +1
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[0068] (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 bio-environmental protection anti-corrosion fillers and volume fillers and stir at high speed for 35 minutes.
[0069] (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.
[0070] Performance Testing:
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Abstract
The invention relates to a two-component waterborne polyurethane primer coating, which is formed by a component Aand a component B, wherein the component A is prepared from the following components in parts by weight: 15 to 32 parts of waterborne hydroxy-polyacrylate dispersion, 12 to 30 parts of waterborne anionic polyacrylate dispersion, 0.02 to 2 parts of defoamer, 0.5 to 3 parts of flatting agent, 1 to 5 parts of wetting dispersant, 0.2 to 4 parts of anti-sagging addition agent, 0.3 to 1.5 parts of adhesion promoter, 5 to 20 parts of bio-environmental anticorrosive packing, 10 to 20 parts of volume filler, and 8 to 30 prats of water; the component B is prepared from the following components in parts by weight: 60 to 80 parts of hydrophilic modified aliphatic polyisocyanate curing agent, and 20 to 40 parts of solvent. The primer coating is safe, environmental-friendly, smooth in appearance of a paint film, excellent in antiseptic property, and simple in preparation method.
Description
technical field [0001] The invention belongs to the technical field of environmental coatings, in particular to a water-based two-component polyurethane primer coating and a preparation method thereof. Background technique [0002] Water-based polyurethane primer coatings have excellent anti-corrosion and weather resistance, and are often used for the protection of metal, concrete and other surfaces. Fillers that are good but 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 primer coatings 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 literature by Zhou Mingji and others (Zhou Mingji, Jiao Qingze, Zhao Yun, etc. Preparation and performance of water-based two-component polyurethane soft-feeling coatings (J). Jo...
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IPC IPC(8): C09D175/04C09D5/08C09D7/65C09D7/20C08G18/79C08G18/62C09D7/47
CPCC08G18/622C08G18/79C08G18/792C08K2201/014C08L2205/02C08L2205/035C09D5/08C09D7/20C09D7/47C09D7/61C09D7/63C09D7/65C09D175/04C08L83/12C08L83/04C08K13/02C08K5/544C08K5/098C08K3/34
Inventor 苏权科魏薇师华杨振波
Owner AVIC BIAM NEW MATERIALS TECH ENG
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