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Nano-modified epoxy zinc-rich coating

An epoxy zinc-rich coating and nano-modification technology, which is applied in epoxy resin coatings, anti-corrosion coatings, coatings, etc., can solve problems such as poor impact resistance, high relative density, and poor adhesion, and achieve coating anti-corrosion Strong performance, strong adhesion, and the effect of reducing ingress

Inactive Publication Date: 2018-06-05
宁波远欣石化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there are some problems in the application of existing epoxy zinc-rich coatings. On the one hand, due to the high relative density of zinc powder, it is easy to sink in the epoxy resin, resulting in poor adhesion and poor uniformity during coating; on the other hand On the one hand, the zinc content in zinc-rich coatings generally exceeds 70%, so the coating is brittle and has poor impact resistance

Method used

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  • Nano-modified epoxy zinc-rich coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A nano-modified epoxy zinc-rich coating, its components include a first component and a second component; the composition and mass parts ratio of the first component are: bisphenol A epoxy resin 20 6 parts, 60 parts of zinc powder, 6 parts of nano-zinc oxide, 6 parts of nano-silica, 6 parts of nano-titanium dioxide, 6 parts of nano-alumina, 12 parts of emulsified asphalt, 8 parts of potassium methyl silicate, defoamer BD- 2 parts of 710, 2 parts of wetting agent SN-WET 996; the composition and mass parts ratio of the second component are: 50 parts of phenolic modified amine, 20 parts of toluene; the first component and the second The ratio of the two components is 1:1.

[0026] The zinc powder is in the form of scales with a particle size of 300 mesh. The pH of the emulsified asphalt is 10, and the solid content is 25%.

Embodiment 2

[0028] A nano-modified epoxy zinc-rich paint, the components of which include a first component and a second component; the composition and mass parts ratio of the first component are: bisphenol F type epoxy resin 25 , 70 parts of zinc powder, 10 parts of nano-zinc oxide, 8 parts of nano-silica, 8 parts of nano-titanium dioxide, 8 parts of nano-alumina, 15 parts of emulsified asphalt, 10 parts of potassium methyl silicate, defoamer BD- 1.5 parts of 710, 3 parts of wetting agent SN-WET 996; the composition and mass parts ratio of the second component are: 70 parts of phenolic modified amine, 30 parts of xylene; the first component and The ratio of the second component is 2:1.

[0029] The zinc powder is in the form of scales with a particle size of 500 mesh. The pH of the emulsified asphalt is 12, and the solid content is 30%.

Embodiment 3

[0031] A nano-modified epoxy zinc-rich coating, the components of which include a first component and a second component; the composition and mass parts ratio of the first component are: bisphenol AD ​​type epoxy resin 15 5 parts, 50 parts of zinc powder, 5 parts of nano-zinc oxide, 5 parts of nano-silica, 5 parts of nano-titanium dioxide, 5 parts of nano-alumina, 10 parts of emulsified asphalt, 8 parts of potassium methyl silicate, defoamer BD- 1 part of 710, 2 parts of wetting agent SN-WET 996; the composition and mass parts ratio of the second component are: 50 parts of phenolic modified amine, 40 parts of butanol; the first component and The ratio of the second component is 3:1.

[0032] The zinc powder is in the form of scales with a particle size of 400 mesh. The emulsified asphalt has a pH of 10 and a solid content of 40%.

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Abstract

The invention provides a nano-modified epoxy zinc-rich coating. The nano-modified epoxy zinc-rich coating is prepared from a first component and a second component, wherein the first component is prepared from 15 to 25 parts of epoxy resin, 30 to 70 parts of zinc powder, 5 to 10 parts of nano-zinc oxide, 5 to 10 parts of nano-silica, 5 to 10 parts of nanometer titania, 5 to 10 parts of nano alumina, 5 to 15 parts of emulsified asphalt, 5 to 10 parts of potassium trimethylsilanolate, 1 to 2 parts of defoaming agent and 2 to 3 parts of wetting agent; the second component is prepared from 30 to 70 parts of curing agent and 10 to 50 parts of solvent, wherein the use ratio of the first component to the second component is (1 to 5) to 1. Under the combined action of the zinc powder and nanometeroxide in the coating, the immersion of a corrosive medium in the coating is reduced; in addition, by adding the emulsified asphalt, the wetting agent and other components, the coating uniformity, adhesion and impact resistance of the coating are improved.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, in particular to a nano-modified epoxy zinc-rich coating. Background technique [0002] Zinc-rich coatings are widely used for anti-corrosion of pipelines, bridges, vehicles, chemical equipment, ships, etc. Zinc-rich coatings can be divided into organic zinc-rich coatings and inorganic zinc-rich coatings according to different film-forming substances. Epoxy zinc-rich coatings are the most important type of organic zinc-rich coatings. Since the electrode potential of zinc is lower than that of iron, the zinc in the epoxy zinc-rich coating can act as a sacrificial anode protection; on the other hand, the epoxy zinc-rich coating also hinders the penetration of the corrosive medium, making the epoxy rich Zinc paint has a very good anti-corrosion effect. [0003] However, there are some problems in the application of existing epoxy zinc-rich coatings. On the one hand, due to the hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/10C09D7/61C09D7/65
CPCC08K2003/0893C08K2003/2227C08K2003/2241C08K2003/2296C08K2201/011C09D5/106C09D163/00C08L95/00C08K13/02C08K3/08C08K3/22C08K3/36C08K5/5419
Inventor 蒋辉
Owner 宁波远欣石化有限公司
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