Water-based polysiloxane cold-spraying zinc coating and preparation method thereof
A technology of polysiloxane and cold spray zinc, which is applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of discoloration and blooming of coatings, affect the appearance and anti-corrosion performance, blacken and discoloration of zinc powder due to oxidation, and improve poor weather resistance , Excellent corrosion resistance, the effect of delaying the corrosion rate
Inactive Publication Date: 2021-04-09
锌盾化工无锡有限公司
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Problems solved by technology
[0003] After the water-based cold-sprayed zinc coating in the industry is exposed to rain outdoors, the exposed zinc powder in the coating is prone to oxidative blackening and discoloration, and more white zinc salts are generated, which leads to discoloration and blooming of the coating, which affects the appearance and anti-corrosion performance, and urgently needs to be solved
Method used
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preparation example Construction
[0034] (1) Preparation of the main ingredient: Add deionized water according to the formula, start the mixer and adjust the speed to 300-500r / min, slowly add the thixotropic agent, keep stirring at the speed for 3-5mins, and increase the speed to 1200-1500r / min, after high-speed dispersion to make a uniform viscous liquid, keep stirring at a constant speed and add dispersant, film-forming agent, and anti-flash rust agent in sequence, and wait until the dispersion is uniform until the fineness is less than 10um, then filter the material in the kettle, Start the mixer and adjust the rotation speed to 300-500r / min, add DIC CERANATE WSA-1070 and pH regulator in turn, after mixing evenly, filter to obtain the main agent of water-based polysiloxane cold spray zinc coating, which is nine formulas A1-A9;
[0035]
[0036] (2) Preparation of curing agent: Add reaction accelerator and DIC CERANATE WSA-950 according to the formula in Table 2. After the materials are mixed evenly, filte...
Embodiment 1
[0040] Example 1: A1:B1:C=10:1:80
Embodiment 2
[0041] Example 2: A2:B1:C=10:2:80
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A water-based polysiloxane cold-spraying zinc coating belongs to the field of coating chemical industry and comprises a main agent, a curing agent and flaky zinc powder in a weight ratio of (10-12):(1-3):(80-90). The main agent is composed of WSA-1070 water-based acrylic acid modified polysiloxane emulsion, a dispersing agent, deionized water, a thixotropic agent, an anti-flash-rust agent, a pH regulator and a film-forming agent; the curing agent is composed of a siloxane coupling agent WSA-950 and a reaction promoter; and the zinc powder is 500-mesh flaky zinc powder. The coating is in a normal-temperature self-drying type, the technical problem that a water-based cold-spraying zinc coating in the industry is prone to floating when exposed to rain outdoors is solved, a paint film has ultralow surface energy, high stain resistance, high durability (damp-heat resistance and hot-cold circulation) and ultrahigh corrosion resistance, a single coating can serve, a subsequent matched coating is not needed, and the requirements for modern energy conservation, safety and environmental protection are met.
Description
technical field [0001] The invention belongs to the field of paint chemical industry, and in particular relates to a water-based polysiloxane cold spray zinc paint and a preparation method thereof. Background technique [0002] Hot-dip galvanizing has always been an effective and reliable anti-corrosion method in the traditional anti-corrosion field. It has been nearly 200 years since the French first applied the hot-dip galvanizing process to industrial production in 1836. Since my country's reform and opening up, the hot-dip galvanizing industry has developed on a large scale along with the rapid development of cold-rolled strip steel in the past forty years. Accompanied by high energy consumption, high pollution, and great harm to people and the environment, cold spray zinc coatings emerged as the times require, which is characterized by a single-component zinc-rich coating with a high zinc content, which is composed of a purity higher than 99.9 % zinc powder, volatile ...
Claims
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IPC IPC(8): C09D183/06C09D5/10
CPCC08K2003/0893C09D5/106C09D183/06C08K3/08
Inventor 杨志华周贤辉周政陈立庄
Owner 锌盾化工无锡有限公司