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A kind of flexible epoxy anti-corrosion primer and preparation method thereof

A flexible epoxy and anti-corrosion technology, applied in the field of coatings, can solve the problems of small elongation at break, prone to cracking, affecting the anti-corrosion effect, etc., to improve adhesion, anti-corrosion performance, and elongation at break improved effect

Active Publication Date: 2017-07-14
AVIC BIAM NEW MATERIALS TECH ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its long-term exposure to the atmospheric environment and the erosion of various adverse environments, the main cable steel wire is prone to corrosion, and the corrosion of the main cable steel wire will seriously endanger the safety of the suspension bridge. Therefore, the main cable steel wire needs to be well repaired. protection
[0003] The existing main cable protection system uses ordinary epoxy anti-rust primer, and the elongation at break is less than 5%.
However, the main cables of suspension bridges are subject to continuous impact deformation, such elongation at break cannot meet the requirements of use, and cracks are prone to occur during use, which affects the overall anti-corrosion effect

Method used

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  • A kind of flexible epoxy anti-corrosion primer and preparation method thereof

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preparation example Construction

[0025] A preparation method of flexible epoxy anticorrosion primer, comprising the following steps:

[0026] (1) Preparation of component A: Add epoxy resin, modified epoxy resin, dispersant, defoamer, anti-settling agent and silane coupling agent into the organic solvent, stir and disperse evenly, then add pigments and fillers and anti-settling agents in sequence Erosion filler; grind the dispersed slurry into a grinder until the slurry fineness reaches 60 μm; add flake filler, disperse evenly, use filter cloth to filter and package, and obtain component A;

[0027] (2) Preparation of component B: Add the modified amine epoxy curing agent into the organic solvent, stir evenly, filter and pack with filter cloth, and then obtain component B.

Embodiment 1

[0029] A flexible epoxy anti-corrosion primer, including A component and B component, the A component is composed of the following components by weight percentage: 40% epoxy resin, 0.5% fumed silica, 0.5% dispersant %, defoamer 1%, epoxy-containing silane coupling agent 1%, mica 8%, ion exchange antirust pigment 10%, iron oxide red 10%, modified polyethylene glycol diglycidyl ether 9 %, toluene 20%; the B component is composed of the following components by weight percentage: modified polyether amine epoxy curing agent 70%, toluene 30%; the weight of A component and B component is mixed during use The ratio is 4:1.

[0030] A preparation method of flexible epoxy anticorrosion primer, comprising the following steps:

[0031] (1) Preparation of component A: Add epoxy resin, modified polyethylene glycol diglycidyl ether, dispersant, defoamer, fumed silica and silane coupling agent containing epoxy group to the organic solvent, Stir and disperse evenly, then add iron oxide red a...

Embodiment 2

[0041] A kind of flexible epoxy anticorrosion primer, comprises A component and B component, and described A component is made up of following components by weight percentage: epoxy resin 20%, organic bentonite, 2%, dispersant 0.1% , defoaming agent 0.85%, epoxy-containing silane coupling agent 0.05%, mica ash 1%, aluminum tripolyphosphate 30%, anatase titanium dioxide 5%, polypropylene glycol diglycidyl ether 4%, positive 20% butanol, 17% isobutanol; the B component is composed of the following components by weight percentage: 60% modified polyetheramine epoxy curing agent, 40% n-butanol; The weight mixing ratio with B component is 4:1.

[0042] A preparation method of flexible epoxy anticorrosion primer, comprising the following steps:

[0043] (1) Preparation of component A: Add epoxy resin, polypropylene glycol diglycidyl ether, dispersant, defoamer, organic bentonite, and silane coupling agent containing epoxy groups into the organic solvent, stir and disperse evenly, an...

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Abstract

The invention provides a flexible epoxy anticorrosive primer which comprises components A and B, wherein the component A consists of the following components in percentage by weight: 20 to 50 percent of epoxy resin, 0.1 to 2 percent of an anti-settling agent, 0.1 to 1 percent of a dispersing agent, 0.05 to 2 percent of an antifoaming agent, 0.05 to 2 percent of a silane coupling agent, 1 to 30 percent of a laminar filler, 5 to 30 percent of an anticorrosive filler, 5 to 20 percent of a pigment filler, 4 to 20 percent of modified epoxy resin and 6 to 37 percent of an organic solvent; the component B consists of the following components in percentage by weight: 60 to 80 percent of a modified amine epoxy curing agent and 20 to 40 percent of an organic solvent. When the flexible epoxy anticorrosive primer is used, the mixing weight ratio of the components A to B is 4:1. The invention further provides a preparation method for the flexible epoxy anticorrosive primer. According to the flexible epoxy anticorrosive primer and the preparation method, the modified epoxy resin and the modified amine epoxy curing agent are matched for use, so that the elongation at break of a film is greatly increased.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a flexible epoxy anti-corrosion primer for main cables of suspension bridges and a preparation method thereof. Background technique [0002] The main cable is one of the most important stress-bearing components of the suspension bridge, and it is a non-replaceable component, and its design life is required to be 100 years. Due to its long-term exposure to the atmospheric environment and the erosion of various adverse environments, the main cable steel wire is prone to corrosion, and the corrosion of the main cable steel wire will seriously endanger the safety of the suspension bridge. Therefore, the main cable steel wire needs to be well repaired. protection. [0003] Common epoxy antirust primer is used in the existing main cable protection system, and the elongation at break is less than 5%. However, the main cables of suspension bridges are subject to continuous impact defo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C09D5/10C09D7/12C08G59/50
CPCC08K2201/014C08L2205/03C09D5/08C09D5/103C09D5/106C09D7/61C09D7/65C09D7/70C09D163/00C08L71/02C08K13/02C08K3/36C08K2003/2272C08K3/346C08K2003/327C08K2003/2241C08L77/00C08K2003/0812C08K2003/0893C08K3/04C08L91/00C08K13/04C08K7/00C08K3/40C08K3/38C08K3/24C08K2003/387
Inventor 白华栋刘伟商汉章胡立明李春魏薇崔晓黎张亮杨振波师华黄玖梅
Owner AVIC BIAM NEW MATERIALS TECH ENG
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