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Solvent-free epoxy coating for high-pressure airless spraying on outer wall of buried steel pipe and preparation method thereof

A high-pressure airless, epoxy coating technology, used in the coating field, can solve the problems of poor coating toughness and sag resistance, and achieve the effects of excellent toughness and sag resistance, viscosity recovery, and good sag resistance.

Active Publication Date: 2020-01-14
石家庄市油漆厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing solvent-free epoxy coating products have problems such as poor coating toughness and sagging resistance when the primary film thickness is large, and there are few domestic reports on the improvement methods of this type of coating

Method used

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  • Solvent-free epoxy coating for high-pressure airless spraying on outer wall of buried steel pipe and preparation method thereof
  • Solvent-free epoxy coating for high-pressure airless spraying on outer wall of buried steel pipe and preparation method thereof
  • Solvent-free epoxy coating for high-pressure airless spraying on outer wall of buried steel pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0044] The weight composition of component A of solvent-free epoxy coating for high-pressure airless spraying on the outer wall of buried steel pipe is shown in the following table:

[0045]

[0046]

[0047] The weight composition of component B raw materials of solvent-free epoxy coating for high-pressure airless spraying of the outer wall of buried steel pipe is shown in the following table:

[0048]

[0049] The solvent-free epoxy coating for the high-pressure airless spraying of the outer wall of the buried steel pipe of embodiment 1-3 is prepared by the following method:

[0050] Add E-51 epoxy resin, SM604, hydrocarbon petroleum resin, dispersant, titanium dioxide, precipitated barium sulfate, wet-process mica powder, anti-sedimentation aid, defoamer, and reactive diluent into the mixing tank in sequence according to the raw material formula , 1200r / min high-speed stirring for 30min, pour into a three-roller mill for grinding, the grinding temperature is 50°C-7...

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Abstract

The invention provides a solvent-free epoxy coating for high-pressure airless spraying on the outer wall of a buried steel pipe. The coating includes component A and component B, wherein component A is composed of the following raw materials in parts by weight: epoxy resin: 35‑45 parts, toughening additive: 2‑10 parts, dispersant: 0.3‑1.0 parts, pigment: 8‑15 parts, precipitated barium sulfate: 20‑30 parts, wet mica powder: 10‑20 parts, anti Precipitation aid: 0.2-2.0 parts, defoamer: 0.1-1.0 parts, glycidyl ether: 1-3 parts, component B: alicyclic amine modified polyamide polymer. The coating meets the preheating double-tube feeding high-pressure airless spraying construction method, a solvent-free epoxy coating with a film thickness of 300-2000 μm in one spraying, and has excellent toughness and anti-sag performance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a solvent-free epoxy coating for high-pressure airless spraying on the outer wall of a buried steel pipe, and at the same time, the invention also relates to a preparation method of the coating. Background technique [0002] In recent years, with the improvement and improvement of environmental protection laws and regulations, the country and the people have paid more and more attention to the concept of environmental protection. Traditional solvent-based coatings will gradually be eliminated by the market. Water-based coatings, solvent-free coatings, powder coatings, etc. Type coatings have gradually become the general trend of industry development. Solvent-free liquid epoxy coating not only has extremely low VOC content, but also has excellent anti-corrosion performance and safe construction. It conforms to the national development principle of "high efficiency, economy, envir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D177/00C09D157/02C09D7/61C09D7/65
CPCC08K2003/3045C08L2205/025C08L2205/035C09D163/00C08L77/00C08L57/02C08K3/36C08K3/34C08K3/30
Inventor 田学辉康海宏郑军生魏梦凯张亚何志彤孙腾远
Owner 石家庄市油漆厂
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