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Underwater construction repairing coating formula and preparation method

An underwater construction and coating technology, applied in the direction of coating, can solve the problems of incomplete curing, poor environmental protection, low volume shrinkage rate of cured products, etc., to avoid excessive viscosity and facilitate construction.

Inactive Publication Date: 2016-06-15
COSCO KANSAI PAINT & CHEM TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, anti-corrosion coatings for underwater and wet interfaces mainly include three systems: polyester resin system, vinyl resin system and epoxy resin system; the coating formed by the polyester resin system is thin and soft, and is easily damaged; the vinyl resin system needs to add solvents , not conducive to construction, incomplete curing in water, and poor environmental protection; the ring-opening reaction of epoxy resin is less affected by water, and epoxy resin molecules contain a large number of polar groups, which are easier to replace water molecules on the surface of the coated object. Good adhesion to various substrates, and low volume shrinkage of the cured product. Epoxy resin has the characteristics of good mechanical properties, high bonding strength, and excellent comprehensive performance. It is suitable for application in the field of anti-corrosion coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The formulation of the repair paint for underwater construction, the mass fraction of each component is: 48.0% of the polymer of alkoxysilane, 5.0% of the organic solvent ethanol, 2.0% of the sodium methylcellulose thickener, and 0.2% of the penetrating agent , Leveling agent is 0.2%, water is 36.0%.

[0017] The penetrant was WetKL245 from TEGO Company in Germany.

[0018] The leveling agent is Glide410 from Germany TEGO Company.

[0019] Weigh according to the above formula, add the oxygen-modified alkoxysilane polymer, organic solvent, and water into the dispersion tank, add thickener, leveling agent, and penetrating agent in turn under stirring, disperse at high speed for 30 minutes, and then pass three Roller grinding fineness <40μm to prepare coatings.

Embodiment 2

[0021] The formula of repairing paint for underwater construction, the mass fraction of each component is: the polymer of alkoxysilane is 50.0%, the organic solvent isopropanol is 5.0%, the hydroxyethyl cellulose thickener is 2.0%, and the penetrating agent is 0.2%, leveling agent is 0.2%, water is 42%.

[0022] The penetrant was WetKL245 from TEGO Company in Germany.

[0023] The leveling agent is Glide410 from Germany TEGO Company.

[0024] Weigh according to the above formula, add the oxygen-modified alkoxysilane polymer, organic solvent, and water into the dispersion tank, add thickener, leveling agent, and penetrating agent in turn under stirring, disperse at high speed for 30 minutes, and then pass three Roller grinding fineness <40μm to prepare coatings.

Embodiment 3

[0026] The formulation of repair paint for underwater construction, the mass fraction of each component is: polymer of alkoxysilane is 50.0%, organic solvent n-butanol is 4.0%, bentonite thickener is 2.5%, penetrating agent is 0.2%, fluid The leveling agent is 0.1%, and the water is 40%.

[0027] The penetrant was WetKL245 from TEGO Company in Germany.

[0028] The leveling agent is Glide410 from Germany TEGO Company.

[0029] Prepare coating according to the preparation method of embodiment 1 or 2.

[0030] The coating prepared by the technical scheme of the present invention is applied to the protection of concrete engineering. In addition to having all the properties of the existing solvent-free epoxy coating, it can also have good penetration and crosslinking with concrete, and the two can be integrated. Water can be used as a solvent diluent to adjust the viscosity to facilitate construction, avoiding the defect of excessive viscosity of solvent-free epoxy coatings duri...

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PUM

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Abstract

The present invention discloses an underwater construction repairing coating formula which comprises, by mass, 48.0-50.0% of a polymer containing epoxy-modified alkoxysilane, 3.0-5.0% of an organic solvent, 0.6 to 2.8% of a thickener, 0.1-0.2% of a penetrating agent, 0.1-0.2% of a leveling agent and 36.0-48.0% of water, the prepared coating can be used in concrete engineering protection, water can be used as a solvent diluent to adjust the viscosity to facilitate the construction, and a defect of too large viscosity of solvent-free epoxy coatings in the construction can be avoided.

Description

technical field [0001] The invention relates to the technical field of reinforced concrete anticorrosion coatings, in particular to a formulation of an underwater construction repair coating and a preparation method thereof. Background technique [0002] Today, with the rapid development of my country's economic construction, infrastructure construction is extensive, involving various fields, such as port wharfs with reinforced concrete structures, bridge piers, wind power tower bases and other facilities. The splash area is subjected to erosion and corrosion by seawater and marine organisms, which damages the original anti-corrosion protective coating on the structure; , tunnels, etc., due to the perennial underwater or humid environment, the reinforced concrete structure has been subjected to waves or water impacts, corrosion, and wear all the year round, causing the original protective layer to be damaged. An anti-corrosion coating that cures to form a film at a wet interfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/12
Inventor 崔文柱杜景怡吴权
Owner COSCO KANSAI PAINT & CHEM TIANJIN