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Water-based silica sol gel inorganic zinc-rich primer and preparation method thereof

A sol-gel, inorganic zinc-rich technology

Inactive Publication Date: 2021-01-08
SHANGHAI ZHENHUA HEAVY IND CHANGZHOU COATINGS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, only the waterproof and hardness were studied, but the anti-corrosion effect of the coating was not studied. It is not clear whether the water-based polysilane sol coating is suitable for heavy-duty anti-corrosion coatings, and the zinc powder content in it is only about 15-40%, which is not zinc-rich. Primer range
For the water-based inorganic zinc-rich primer, the zinc powder content is very high, and the metal zinc content needs to account for more than 60% of the dry film weight to have a long-term cathodic protection anticorrosion effect. During the inventor's research, it was found that different Water-based polysilane sol has a great influence on drying speed, adhesion, coating performance, etc., and construction and curing are greatly affected by ambient temperature and humidity
[0007] How to prepare a water-based inorganic zinc-rich primer, without using alkali metal silicates, and solve the problem of high VOC in solvent-based inorganic zinc-rich primers in the existing industry, additional humidification during construction and curing, and coating pores High efficiency, slightly thicker film thickness, cracking and poor adhesion, etc., also solve the strong alkali characteristics of traditional water-based alkali metal silicate inorganic zinc-rich primers, reduce the adverse effects of strong alkali on the environment and steel, and improve the relationship with the upper layer The supporting property of coating is the technical problem to be solved by the present invention

Method used

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  • Water-based silica sol gel inorganic zinc-rich primer and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The components of water-based silica sol gel inorganic zinc-rich paint are:

[0046] Component A

[0047] Aqueous silica sol gel: 36.7g (14.7%)

[0048] Deionized water: 24.2g (9.7%)

[0049] Auxiliary 3.1g (1.2%) - specifically composed of 0.1g bactericide, 0.2g defoamer, 0.5g dispersant, 2.2g anti-settling thixotropic agent: 0.1g wetting and leveling agent;

[0050] Zinc oxide: 1.5g (0.6%)

[0051] Zinc chloride: 3.0g (1.2%)

[0052] Silica powder: 28.5g (12.6%)

[0053] Component B:

[0054] 500 mesh spherical active zinc powder: 150g

[0055] Put 36.7g of water-based silica sol gel liquid and 1.8g of organosilane polymer into 24.2g of deionized water, add 0.1g of bactericide, 0.2g of defoamer, 0.5g of dispersant, 2.2g of anti-sedimentation thixotropic agent, 0.1g Wetting and leveling agent, after uniform mixing, put in 1.5g of zinc oxide, 1.5g of zinc chloride, 30.0g of silicon micropowder, disperse evenly through high-speed shearing, and prepare a paint to o...

Embodiment 2

[0058] The components of water-based silica sol gel inorganic zinc-rich paint are:

[0059] Component A

[0060] Aqueous silica sol gel: 34.7g (15.2%)

[0061] Deionized water: 18.3g (8.0%)

[0062] Auxiliary 4.1g (1.8%) - specifically composed of 0.1g bactericide, 0.2g defoamer, 1.5g dispersant, 2.2g anti-settling thixotropic agent: 0.1g wetting and leveling agent;

[0063] Zinc oxide: 3.5g (1.5%)

[0064] Zinc chloride: 2.3g (1.0%)

[0065] Feldspar powder: 5.8g (2.5%)

[0066] Component B:

[0067] 500 mesh spherical active zinc powder: 160g

[0068] Put 34.7g of aqueous silica sol gel liquid and 2.0g of organosilane polymer into 18.3g of deionized water, add 0.1g of bactericide, 0.2g of defoamer, 1.5g of dispersant, 2.2g of anti-sedimentation thixotropic agent, 0.1g Wetting and leveling agent, after mixing evenly, put in 3.5g zinc oxide, 2.3g zinc oxide, 5.8g feldspar powder, disperse evenly through high-speed shearing, blend into paint, and obtain component A;

[...

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Abstract

The invention relates to the field of coatings, and provides a water-based silica sol gel inorganic zinc-rich primer and a preparation method thereof, the product is composed of a water-based silica sol gel solution, a filler, an auxiliary agent and deionized water; and zinc powder is used as another reaction component. In addition, an organosilane polymer is also added, the water-based silica solgel solution and the organosilane polymer are added into deionized water during preparation, the auxiliary agent and the filler are added, a mixture is uniformly dispersed through high-speed shearing, and a base material component is obtained through blending; during construction, the base material component and the zinc powder component are blended in proportion and stirred uniformly, and cleanwater is used for adjusting the construction viscosity for coating. The problems that in the prior art, solvent type inorganic zinc-rich primer is high in VOC, large in coating porosity, thick in coating cracking and poor in adhesion, and the strong alkali characteristic of traditional water-based alkali metal silicate inorganic zinc-rich paint has adverse effects on the environment and steel aresolved. The water-based silica sol gel inorganic zinc-rich primer is used for carbon steel anticorrosion protection in severe environments, and is also used for static electricity conduction protection in chemical storage tanks.

Description

technical field [0001] The invention relates to a coating paint, in particular to a steel anticorrosion protective paint which can be used in harsh and harsh marine environments and an anticorrosion protective paint which can be used for the inner wall of a solvent storage tank, and a preparation method and a construction method thereof. Background technique [0002] Steel is one of the most important industrial materials. Among the many measures to prevent and delay the corrosion of steel, the most economical and effective is to use coatings for anti-corrosion protection. For offshore and coastal bridges, ships, storage tanks, drilling platforms, pipe racks, oil pipelines, tanks and other large steel structures and steel equipment, coatings are almost the only effective protective measures available. As an important variety of steel anti-corrosion coatings, zinc-rich coatings use the active energy of zinc powder to form electrochemical cathodic protection to effectively pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/10C09D7/61C09D5/24C09D7/20
CPCC09D1/00C09D5/106C09D7/61C09D5/24C09D7/20
Inventor 戴红艳范晚秋崔国鹏
Owner SHANGHAI ZHENHUA HEAVY IND CHANGZHOU COATINGS CO LTD
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