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Self-repair epoxy residual rust paint and preparation method thereof

A kind of rust coating, epoxy technology, applied in the field of coatings, to achieve good storage stability, good dispersion and compatibility.

Active Publication Date: 2014-08-13
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if phosphoric acid is used in solvent-based coatings, it will bring many problems, such as the compatibility of moisture in phosphoric acid with the film-forming substances of solvent-based coatings. layer premature failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] Preparation of coated solid phosphoric acid composition:

[0037] Add 40kg of coupling agent, 40kg of metaphosphoric acid, and 20kg of manganese dihydrogenphosphate into the reaction kettle, and stir for 0.5h at a rotational speed of 1200rpm. Then put it into a ball mill and grind for 10 h until the fineness reaches 38 microns. The material is then filtered, dried at 90° C. for 8 hours, ground, and passed through a 325-mesh sieve to obtain a coated solid phosphoric acid composition.

[0038] Preparation of epoxy self-repairing rust coating:

Embodiment 1

[0042] Add 4.5kg of the above coating solid phosphoric acid composition to the reactor under stirring, then add 64kg E20 epoxy resin (solid content 75%), 0.5kg Disperbyk ? -160 dispersant, 0.5kg JF-38 anti-sedimentation agent, 15.5kg xylene and 15kg titanium dioxide, stirred for 40 minutes; then these epoxy resin mixtures were ground to obtain component 1 of epoxy self-repairing rust coating; Dissolve 50kg 8115 polyamide resin curing agent in 50kg toluene in another reaction kettle to make component two of epoxy self-repairing rust coating; Divide into two parts and add to component one, and cure for 7 days at room temperature to form an epoxy self-repairing rust coating.

Embodiment 2

[0044] Add 0.8kg of the above coating solid phosphoric acid composition to the reactor under stirring, then add 64kg E20 epoxy resin (solid content 75%), 0.5kg Disperbyk ?-160 dispersant, 0.5kg JF-38 anti-sedimentation agent, 19.2kg xylene and 15kg titanium dioxide, stirred for 40 minutes; then these epoxy resin mixtures were ground to obtain component 1 of epoxy self-repairing rust coating; Dissolve 50kg 8115 polyamide resin curing agent in 50kg toluene in another reaction kettle to make component two of epoxy self-repairing rust coating; Divide into two parts and add to component one, and cure for 7 days at room temperature to form an epoxy self-repairing rust coating.

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Abstract

The invention provides self-repair epoxy residual rust paint and a preparation method thereof. The self-repair epoxy residual rust paint comprises epoxy resin, a solid phosphoric acid composition, auxiliaries, solvents, curing agents and the like. The preparation method is characterized by coating the solid phosphoric acid composition by utilizing a coupling agent and then preparing the self-repair epoxy residual rust paint with the coated solid phosphoric acid composition. The paint has very strong rust layer transformation capacity and can be widely applied to anti-corrosion construction of steel structure parts on which rust layers are difficult to completely remove.

Description

[0001] technical field [0002] The invention relates to a preparation method of an epoxy self-repairing rusty coating, which belongs to the technical field of coatings. Background technique [0003] Most of the existing rusty coatings contain chromate or chromic acid coordination compounds. When these compounds are hydrolyzed, they generate heteropolyacids, which react with rust to form stable complexes that inhibit rust growth. Disclosed as CN101698776A is a kind of band rust coating for oil well pipe, the raw material composition of this coating comprises alkyd resin, leveling agent, defoamer, dispersant, thickener, drier, anti-skinning agent, adhesion promoter , Iron oxide red powder, carbon black, zinc phosphate, calcium carbonate, rust inhibitor powder and solvent. Rust inhibitor powder is diphenylguanidine chromate. Due to the restriction of environmental regulations, the use of paints containing hexavalent chromium will be prohibited. [0004] Researchers are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D5/08C09D7/12
Inventor 尹桂来涂湛唐囡万军彪刘福春韩恩厚
Owner STATE GRID CORP OF CHINA
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