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Hyperbranched polyurethane finishing coat for urban railway vehicles

A technology for hyperbranched polyurethane and urban rail vehicles, which is applied in the field of hyperbranched polyurethane topcoat for urban rail vehicles and its preparation, can solve the problems of increased color difference and reduced gloss of the coating, and achieves improved smoothness and weather resistance, The effect of maintaining gloss and good scratch resistance

Active Publication Date: 2018-06-08
株洲市九华新材料涂装实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increase in the number of rail transit vehicles in operation, some problems related to coating gradually appeared during operation, such as frequent scrubbing, which caused the color difference of the coating to increase and the gloss to decrease, etc. Various problems have also attracted more and more attention from customers

Method used

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  • Hyperbranched polyurethane finishing coat for urban railway vehicles
  • Hyperbranched polyurethane finishing coat for urban railway vehicles
  • Hyperbranched polyurethane finishing coat for urban railway vehicles

Examples

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Embodiment Construction

[0050] A hyperbranched polyurethane topcoat for urban rail vehicles, comprising two parts of a paint material and a curing agent, characterized in that said polyurethane paint is made from the following raw materials and steps:

[0051] (1) The weight ratio of each raw material forming the paint is:

[0052]

[0053] Wherein the diluent is xylene: butyl acetate: a mixed solvent of PMA=1:1:1;

[0054] The functional filler slurry is nanocrystalline carbon powder: nano-dispersant: hyperbranched polyester acrylic resin: diluent=50:5:40:5;

[0055] (2) The weight proportion of each raw material forming curing agent is:

[0056] 45-55 parts of isophorone diisocyanate (IPDI),

[0057] 20-25 parts of xylene,

[0058] 20-25 parts of butyl acetate;

[0059] The steps are:

[0060] A. Preparation of functional filler slurry: first add hyperbranched polyester acrylic resin in the container by weight, and place the container cylinder under the disperser, turn on the disperser, adj...

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Abstract

The invention relates to a hyperbranched polyurethane finishing coat for urban railway vehicles, and a preparation method thereof. The finishing coat is characterized in that hyperbranched polyester acrylic resin, fluorosilicone modified acrylic resin, a pigment, a functional filler slurry, an assistant and a solvent form a paint; IPDI (isophorone diisocyanate) and the solvent form a curing agent;and the finishing coat is prepared from the paint and the curing agent according o a weight ratio of the paint to the curing agent of 100:40 when constructed, and a proper amount of a diluent can beadded to adjust the construction velocity in order to facilitate the construction. The finishing coat for urban railway vehicles has the advantages of high weather resistance, good wear resistance, good scratch resistance, good scrub resistance, good resistance to acids and alkalis, high hardness, good flame retardancy, low smoke toxicity, good water resistance and good elasticity. The finishing coat can adapt to sandstorm, acids-alkalis, moisture, ultraviolet rays and various other harsh weather conditions, and can adapt to frequent cleaning using cleaning agents having different pH values, apaint film formed by the finishing coat can maintain glossy and avoids great color difference change for a long time, and the service life reaches 10 years or more, and is far longer than the current4-6 year requirement of paints.

Description

technical field [0001] The invention relates to a highly weather-resistant and wear-resistant polyurethane topcoat, in particular to a hyperbranched polyurethane topcoat for urban rail vehicles and a preparation method thereof; Background technique [0002] In recent years, the overall development trend of the rail transit industry has been good, especially the subways and light rails in various cities have received great attention and support. The number of standard urban rail transit vehicles in operation in the country has risen from 34,415 units in 2013 to 2015 by the end of 2015. 48,165 units, and the number has continued to grow at a rate of more than 7,000 units per year in the past two years. With the increase in the number of rail transit vehicles in operation, some problems related to coating gradually appeared during operation, such as frequent scrubbing, which caused the color difference of the coating to increase and the gloss to decrease, etc. Various problems ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D133/04C09D5/18C09D7/61C09D7/65
Inventor 邹启强张丹倪宇
Owner 株洲市九华新材料涂装实业有限公司
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