Powder coating as well as preparation method and application thereof

A technology of powder coatings and coatings, applied in the field of coatings, which can solve the problems of non-abrasive coatings and achieve good adhesion, enhanced wear resistance, and good leveling

Pending Publication Date: 2022-03-01
CRRC YANGTZE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this application is to provide a powder coating and its preparation method and application, so as to solve the technical problem that the coating is not wear-resistant in the current coating or lacquer

Method used

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  • Powder coating as well as preparation method and application thereof
  • Powder coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] According to another typical embodiment of the present invention, a method for preparing a powder coating for railway wagon accessories is provided, comprising the following steps:

[0044] S1. Mix the coupling agent and glass flakes evenly in advance, spread out and heat to 105°C and bake for 3 hours, then use a mixer to crush into powder and sieve through a 50-mesh sieve;

[0045] S2. Stir the thermosetting epoxy resin, curing agent, pigment, leveling agent, degassing agent, antioxidant, loosening agent, filler and glass flake-coupling agent premix at a speed of 500 to 800r / min for 15 ~30min for full mixing;

[0046] S3. Send the mixed material into the melting machine from the feed port to melt, and press the tablet machine to obtain the tablet material, and cool to room temperature;

[0047] S4. The flakes are crushed and separated, and sieved with a 150-mesh sieve, and the obtained powder is the powder coating for railway wagon accessories.

[0048] According to ...

Embodiment 1-3

[0054] A kind of powder coating, the raw material of described coating is as shown in the table below in parts by mass:

[0055] Example 1 Example 2 Example 3 thermosetting epoxy resin 45 55 60 Hardener 13.5 14.5 15 pigment 1.5 1.5 1.5 glass flakes 30 25 20 leveling agent 0.5 0.5 0.5 Degasser 1.0 0.7 1.0 Antioxidants 0.3 0.3 0.3 Loosening agent 0.5 0.5 0.5 coupling agent 2 2 1.2 filler 5.7 0 0

[0056] Among them, the thermosetting epoxy resin is novolak epoxy resin; the curing agent is HT2844 modified dicyandiamide curing agent; the pigment is SW-160 carbon black from Quanzhou Sanwei Chemical; the glass flakes are the glass flakes of Shanghai Yipin Pigment; The leveling agent is polyvinyl alcohol-butyral leveling agent; the degassing agent is benzoin; the antioxidant is CHEMNOX1098 hindered phenolic antioxidant; the loosening agent is AEROSIL R972 fumed silica of Degussa Company...

experiment example

[0060] The coating or lacquer provided by embodiment 1-3 and comparative example 1 is carried out performance testing, and the results are shown in the table below:

[0061]

[0062] It can be seen from the above table that (1) the hardness and abrasion resistance of the powder coating are better than those of the comparative example; (2) the VOC content of the comparative example is significantly higher than that of the powder coating. (3) The salt spray resistance of both can reach 1500h.

[0063] One or more technical solutions in the embodiments of the present invention also have at least the following technical effects or advantages:

[0064] (1) The powder coating used for the body of the embodiment of the present invention has good wear resistance, so that the accessories can bear the abrasion of sand grains, prolonging the service life of the car body;

[0065] (2) The anticorrosion performance of the powder coating provided by the embodiment of the present inventi...

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Abstract

The invention particularly relates to a powder coating and a preparation method and application thereof, and belongs to the technical field of coatings, the coating comprises the following raw materials by mass: 40-70 parts of thermosetting epoxy resin, 5-40 parts of a curing agent, 0.5-2 parts of a pigment, 20-30 parts of glass flakes, 0.2-2 parts of a leveling agent, 0.5-2 parts of a degassing agent, 0.2-10 parts of an antioxidant, 0.2-5 parts of a bulking agent, 0.5-2 parts of a coupling agent and 0-20 parts of a filler; the powder coating is good in wear resistance, so that accessories can bear the wear of sand grains, and the service life of a vehicle body is prolonged and can reach 1500 hours; the VOC content is low, and the environment is protected.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a powder coating and its preparation method and application. Background technique [0002] At present, most of the parts of railway wagons still use oil / water-based paint. During the repair process of railway wagons, it was found that the accessories were eroded and worn by sand particles, and the corrosion and damage were serious, which affected the service life of the whole vehicle. The combination of oil-based two-component epoxy primer and oil-based two-component polyurethane topcoat can well meet the anti-corrosion requirements of railway wagon accessories, but there are defects such as high VOC content and non-wear-resistant coating. Contents of the invention [0003] The purpose of this application is to provide a powder coating and its preparation method and application, so as to solve the technical problem that the coating is not wear-resistant in the current coating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/04C09D5/03C09D7/61B05D5/08B05D7/24
CPCC09D163/04C09D5/033B05D5/08B05D7/24C08K7/00
Inventor 陶加法肖艳石忠华刘华学郑建松潘隽凌姚凌云王晨光彭德富
Owner CRRC YANGTZE CO LTD
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