Polyurethane self-healing rust coating with rust transformation and stabilization

A technology with rust coating and stabilization effect, applied in the field of coatings, can solve the problems of coating blistering, compatibility problems, high solubility, etc., and achieve the effect of good dispersion, compatibility and good storage stability

Active Publication Date: 2017-02-15
STATE GRID CORP OF CHINA +2
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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, in order to be able to better use phosphoric acid and tannic acid in solvent-based coatings, solve the compatibility problem of acidic compounds and solvent-based coating film-forming substances; For the problem of coating foaming, the present invention proposes a polyurethane self-repairing rust coating with rust transformation and stabilization

Method used

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  • Polyurethane self-healing rust coating with rust transformation and stabilization

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preparation example Construction

[0030] Preparation of the coated acidic composition:

[0031] Add solvent to the reaction kettle, then add 0.6% ETERAC 7307-2-PM-70 resin of solvent quality, after mixing evenly, add metaphosphoric acid with 2% solvent amount, zinc dihydrogen phosphate with 1% solvent amount, 1% solvent amount Amount of phytic acid, stirred at 600rpm for 0.3h, then ground for 4h, after testing the fineness ≤ 40µm, took out the base material, then added 0.3% solvent quality 172N curing agent, stirred at 1000rpm for 0.5h. Then react at 70° C. for 3 h, and after cooling, centrifuge the obtained solid to perform solvent washing, spray drying at 70° C., and jet crushing to obtain the coated acidic composition.

[0032] Preparation of polyurethane self-repairing rust coating:

Embodiment 1

[0036] Add 64kg ETERAC 7307-2-PM-70 resin to the container, then add 0.5kg Disperbyk while stirring ® -110 dispersant, 0.5kg VISCOGEL ED anti-sedimentation agent, 14.5kg methyl ethyl ketone, 5.5kg of the above coating acidic composition and 15kg of titanium dioxide, stirred for 40 minutes; then these resin mixtures were ground to obtain the polyurethane self-repairing rust coating Component 1; dissolve 50kg 172N curing agent in 50kg butyl acetate in another container to make component 2 of polyurethane self-repairing rust coating; Component two is added to component one, and cured at room temperature for 7 days to form a polyurethane self-repairing rust coating.

Embodiment 2

[0038] Add 64kg ETERAC 7307-2-PM-70 resin to the container, then add 0.5kg Disperbyk while stirring ® -110 dispersant, 0.5kg VISCOGEL ED anti-settling agent, 18.8kg methyl ethyl ketone, 1.2kg of the above coating acidic composition and 15kg of titanium dioxide, stirred for 40 minutes; then these resin mixtures were ground to obtain the polyurethane self-repairing rust coating Component 1; dissolve 50kg 172N curing agent in 50kg butyl acetate in another container to make component 2 of polyurethane self-repairing rust coating; Component two is added to component one, and cured at room temperature for 7 days to form a polyurethane self-repairing rust coating.

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Abstract

The invention provides self-repair polyurethane (PU) residual rust paint with the functions of transforming and stabilizing rust layers. The self-repair PU residual rust paint comprises synthetic resin, an acid composition, auxiliaries, solvents, curing agents and the like. A preparation method of the self-repair PU residual rust paint is characterized by coating the acid composition by utilizing a coupling agent and then preparing the self-repair PU residual rust paint with the coated acid composition. The self-repair PU residual rust paint has the beneficial effects that the prepared completely coated acid composition has good dispersibility and compatibility in the PU paint, thus solving the problem of paint coat bubbling due to high solubility of the non-coated acid composition after the non-coated acid composition is directly added; the acid composition can be released slowly under the condition that water exists on the boundary of the paint coat and the base material to transform the rust layers and then form stable rust layer products; the paint has the functions of phosphatizing and self-repairing corrosion-free steel and iron. The paint has very strong rust layer transformation and stabilization capacities and can be widely applied to anti-corrosion construction of steel structure parts on which rust layers are difficult to completely remove.

Description

technical field [0001] The invention relates to a polyurethane self-repairing rust-carrying coating with rust layer conversion and stabilization functions, belonging to the technical field of coatings. Background technique [0002] Phosphoric acid and tannic acid are an important component of environmentally friendly rust coatings. Disclosed a kind of water-based anticorrosion coating with rust as Chinese patent CN1084906, its component comprises synthetic resin emulsion, rust-transferring rust-stabilizing agent, penetrating degreaser, phosphating passivation agent, water, wherein rust-transferring stabilizer is oxalic acid, tartaric acid , tannin, phosphoric acid. Chinese patent CN1052317 discloses a water-based paint with rust, which is composed of a synthetic resin emulsion, a conversion agent, a thickener, a film-forming aid, a freeze-thaw stabilizer and other additives, wherein the conversion agent is tannic acid or gallic acid. It can be seen that phosphoric acid and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D175/06C09D5/08
Inventor 唐囡杨又华张宇邓静伟刘福春韩恩厚
Owner STATE GRID CORP OF CHINA
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