Polyester heavy-duty anticorrosive coating with polyaniline-modified glass flakes, and preparation method thereof

A technology of glass flakes and polyaniline, applied in anti-corrosion coatings, polyester coatings, coatings, etc., can solve problems such as corrosion, and achieve the effects of not easy to sink, strong corrosion resistance and permeability resistance, and good storage stability

Active Publication Date: 2011-08-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a polyaniline modified glass flake polyester heavy-duty anti-corrosion coating and its preparation method, which solves the problem that most of the existing glass flake anti-corrosion coatings need to be coated with primer on the surface of steel or other metal substrates during construction. To increase the anti-corrosion performance and prevent corrosion at the interface between the coating and the substrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0048] Prepare polyaniline-modified glass flakes as follows:

[0049] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: wherein the phosphoric acid is 1.3 mol / liter; the phytic acid is 0.6 mol / liter.

[0050] (b) Add aniline to the mixed aqueous solution of phosphoric acid and phytic acid, the concentration of aniline after mixing is: 0.5 mol / liter. Stirring was continued for 1.5 hours. Take 500ml of mixed aqueous solution of phosphoric acid, phytic acid and aniline, add 70g of 240-mesh glass flakes, stir for 25 minutes, and pre-cool to 8°C.

[0051] (c) Prepare an aqueous solution of an oxidizing agent: select benzoyl peroxide as an oxidizing agent, and prepare a concentration of benzoyl peroxide of 1.5 mol / liter. Precool the aqueous solution of benzoyl peroxide to 8°C.

[0052] (d) Slowly add 500ml of solution (c) into 500ml of phosphoric acid, phytic acid and aniline mixed aqueous solution (b) containing glass flakes within 10-30 minutes, react at ...

Embodiment 4-6

[0056] Prepare polyaniline-modified glass flakes as follows:

[0057] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: wherein phosphoric acid is 0.4 mol / liter; phytic acid is 0.15 mol / liter.

[0058] (b) Add aniline to the mixed aqueous solution of phosphoric acid and phytic acid, and the concentration of aniline after mixing is: 0.2 mol / liter. Stirring was continued for 1.2 hours. Take 500ml of mixed aqueous solution of phosphoric acid, phytic acid and aniline, add 20g of 325-mesh glass flakes, stir for 15 minutes, and pre-cool to 2°C.

[0059] (c) Prepare an aqueous solution of an oxidizing agent: ammonium persulfate is selected as the oxidizing agent, and the concentration of ammonium persulfate prepared is 0.5 mol / liter. The aqueous solution of ammonium persulfate was precooled to 2°C.

[0060] (d) Slowly add 500ml of solution (c) into 500ml of phosphoric acid, phytic acid and aniline mixed aqueous solution (b) containing glass flakes within 15 ...

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Abstract

The invention relates to coating technology, in particular to a polyester heavy-duty anticorrosive coating with polyaniline-modified glass flakes, and a preparation method thereof, which solves the problem that the surfaces of steel or other metal substrates need to be coated with primer to increase anti-corrosion performance and prevent coatings and substrate interfaces from being corroded in the construction of most of the prior glass-flake anticorrosive coatings. The polyester heavy-duty anticorrosive coating with polyaniline-modified glass flakes comprises unsaturated polyester resin, thepolyaniline-modified glass flakes, amine curing agent and the like. As polyaniline coating layers are formed on the surfaces of the glass flakes by an oxidative polymerization method, the treated glass flakes have the effect of passivating metal, and phytic-acid coating layers on the surfaces of the glass flakes play a role in inhibiting corrosion of metal. The polyester heavy-duty anticorrosive coating with polyaniline-modified glass flakes has strong corrosion resistance and permeation resistance, can be applied to heavy-duty engineering in the fields of petrochemical industry, wharf facilities, ships and the like, and is particularly applicable to the protection of spray splash areas and tidal range areas.

Description

technical field [0001] The invention relates to paint technology, in particular to a polyaniline-modified glass flake polyester heavy-duty anti-corrosion paint and a preparation method thereof. Background technique [0002] Chinese invention patent (Patent No. ZL 91111830.6) proposes a preparation method of glass flake anti-corrosion coating, which is composed of epoxy resin, glass flake, solvent, titanate coupling agent, and modified amine curing agent. Chinese invention patent application (publication number CN 1789351A) discloses a glass flake mastic coating, which consists of vinyl ester resin, glass flakes and additives, and is used in places with high requirements for flue gas desulfurization and anticorrosion. Chinese invention patent (Patent No. ZL 93117158.X) proposes a method for preparing a boron-modified phenolic resin anti-corrosion composite material containing glass flakes. Chinese invention patent application (publication numbers CN 1861717A, 1861718A, 18617...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/06C09D7/12C09D5/08C09C3/10C09C1/28
Inventor 刘福春郝永胜王震宇史洪微韩恩厚柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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