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Waterborne epoxy anticorrosive coating containing composite active salt and preparation method of coating

A technology of water-based epoxy and anti-corrosion coatings, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., and can solve the problems of poor anti-corrosion performance of water-based epoxy coatings, limited inhibition of corrosion ions, and imperfect preparation process of modified products and other problems, to achieve the effect of improving the overall anti-corrosion performance, excellent adhesion, and excellent corrosion resistance

Active Publication Date: 2019-08-30
MARINE CHEM RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fillers used in traditional water-based epoxy anti-corrosion coatings are mostly traditional anti-corrosion fillers such as zinc phosphate, aluminum tripolyphosphate, and iron red. These inert fillers have limited inhibitory effect on corrosion ion penetration, which is the cause of poor anti-corrosion performance of water-based epoxy coatings. one of the reasons
At present, more novel water-based epoxy anti-corrosion coatings add more graphene and its modified substances, which can improve the performance of water-based epoxy anti-corrosion coatings to a certain extent, but the price of graphene is relatively expensive, and the preparation process of its modified substances is not perfect, which is not conducive to Promotion, comprehensive market application effect is not good

Method used

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  • Waterborne epoxy anticorrosive coating containing composite active salt and preparation method of coating
  • Waterborne epoxy anticorrosive coating containing composite active salt and preparation method of coating
  • Waterborne epoxy anticorrosive coating containing composite active salt and preparation method of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A component:

[0034]

[0035] B component:

[0036]

[0037] A component: B component is mixed according to the mass ratio = 3:1, and the water-based epoxy anticorrosion coating is prepared.

[0038] Wherein, the preparation of the composite active calcium phosphite / calcium metaaluminate is to mix calcium phosphite and calcium metaaluminate in a mass ratio of 7:3 to obtain 100 g of the mixture, which is then added to 100 g of γ-aminopropanol containing 2%. Base triethoxysilane / ethanol solution, stirred at 70°C for 2h, and kept condensing to reflux. After standing still for 24 hours, the mixture was suction filtered and dried at 70°C.

[0039] The preparation method of the water-based epoxy anti-corrosion coating of this embodiment is as follows: in the state of stirring, first mix the acrylic polymer BYK-190, the silicone defoamer BYK-022 and the polyether modified polydimethyl Mix siloxane BYK-348 with deionized water evenly, then add carbon black, mica powder,...

Embodiment 2

[0041] A component:

[0042]

[0043] B component:

[0044]

[0045] A component: B component is mixed according to the mass ratio = 4:1, and the water-based epoxy anticorrosion coating is prepared.

[0046] Among them, the preparation method of composite active sodium phosphite / sodium metaaluminate is as follows: mix sodium phosphite and sodium metaaluminate at a mass ratio of 6:4, and put the mixture into γ-aminopropyl tris In the ethoxysilane / ethanol solution, stir at 60°C for 4h, and keep condensing to reflux; after standing still for 36h, the mixture is suction filtered and dried at 80°C. Others are the same as embodiment 1.

Embodiment 3

[0048] A component:

[0049]

[0050] B component:

[0051]

[0052] A component: B component is mixed according to the mass ratio = 5:1, and the water-based epoxy anticorrosion coating is prepared. other same

[0053] Example 1.

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Abstract

The invention discloses a waterborne epoxy anticorrosive coating containing a composite active salt and a preparation method of the coating. The coating comprises a component A and a component B, andthe mass ratio of the component A to the component B is (3-5):1. The component A comprises: 35-40 parts of a waterborne epoxy emulsion, 1-2 parts of carbon black, 10-15 parts of mica powder, 10-15 parts of precipitated barium sulfate, 10-20 parts of a composite active salt phosphite / metaaluminate, 1-2 parts of a wetting and dispersing agent, 0.3-0.5 part of an antifoaming agent, 0.3-0.5 part of aleveling agent, 2-3 parts of a thixotropic agent, and 20-30 parts of deionized water. The component B comprises: 7-10 parts of a waterborne epoxy curing agent, 3-5 parts of a co-solvent, 10-15 parts of deionized water, and 1-3 parts of an amino group-containing organosilicon monomer. The phosphite / metaluminate composite active filler is selected as an anticorrosive filler, a cured film is formed by combining with a resin, and a coating layer formed by the prepared waterborne epoxy composition coating has excellent corrosion resistance to salt spray, cathode peeling, seawater immersion and deionized water immersion, and has excellent adhesion.

Description

technical field [0001] The invention belongs to the technical field of water-based paint anticorrosion, and in particular relates to a water-based epoxy anticorrosion paint containing composite active salt and a preparation method thereof. Background technique [0002] With the limitation of environmental protection conditions, water-based epoxy anti-corrosion coatings have been widely concerned and applied. Although there is still a big gap between waterborne epoxy coatings and solvent-based coatings, researchers have been working hard to improve the anti-corrosion function of waterborne epoxy coatings. On the one hand, it is to improve the water-based resin system, and on the other hand, it is to improve the anti-corrosion filler. The fillers used in traditional water-based epoxy anti-corrosion coatings are mostly traditional anti-corrosion fillers such as zinc phosphate, aluminum tripolyphosphate, and iron red. These inert fillers have limited inhibitory effect on corros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/61C09D7/63
CPCC09D5/08C09D7/61C09D7/63C09D163/00C08K13/02C08K3/32C08K3/24C08K5/544C08K3/34
Inventor 李明春康思波蒋健明刘希燕李旭朝桂泰江
Owner MARINE CHEM RES INST
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