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Solvent-based two-component elastic polyester/polyurethane sandstorm resistant train coating and preparation method thereof

An elastic polyester, two-component technology, applied in the field of coatings, can solve the problems of unsuitability for train body painting, low gloss, poor weather resistance, etc., and achieve the effect of convenient packaging, transportation, installation and operation, and good storage stability.

Active Publication Date: 2014-11-05
卡秀万辉(无锡)高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has the following disadvantages when it is used alone to make anti-wind and sand coatings: 1. It takes a long time to fully cure, which delays the production cycle; 2. It has poor weather resistance and cannot adapt to the characteristics of the western climate; Gloss effect; 4. Because of its softness and wear resistance, once damaged, it is difficult to repair a large area, so it is not suitable for the coating of train bodies

Method used

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  • Solvent-based two-component elastic polyester/polyurethane sandstorm resistant train coating and preparation method thereof
  • Solvent-based two-component elastic polyester/polyurethane sandstorm resistant train coating and preparation method thereof
  • Solvent-based two-component elastic polyester/polyurethane sandstorm resistant train coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The invention is a preparation method of a solvent-based two-component elastic polyester / polyurethane anti-wind and sand train coating. The following process steps are adopted, and the formula ratio is calculated by weight percentage:

[0038] (1) Preparation of component A main agent:

[0039] ① Premix 7% of elastic polyester resin, 60% of acrylic modified polyester resin, and 20% of propylene glycol methyl ether acetate, and stir and disperse at 800 rpm for 10 minutes;

[0040] 2. Under stirring state at 800 rpm, add 3% of 3-methyl-3-methoxybutyl acetate, 2% of leveling agent, 2.8% of light stabilizer, and 0.2% of catalyst to the mixture obtained in step 1. Stir and disperse for 15 minutes at a speed of 1500 rpm;

[0041] ③Under stirring at 800 rpm, add 5% butyl acetate to the mixture obtained in step ② to adjust the viscosity to become a finished product. Viscosity: 30±3 seconds; the viscosity is measured with a DIN No. 4 cup at a temperature of 23°C; the solid con...

Embodiment 2

[0046] The invention is a preparation method of a solvent-based two-component elastic polyester / polyurethane anti-wind and sand train coating. The following process steps are adopted, and the formula ratio is calculated by weight percentage:

[0047] ① Pre-mix 10% elastic polyester resin, 56% acrylic modified polyester resin, and 20% propylene glycol methyl ether acetate, and stir and disperse for 8 minutes at a speed of 1000 rpm;

[0048] 2. Under stirring state at 800 rpm, add 4% of 3-methyl-3-methoxybutyl acetate, 2.2% of leveling agent, 2.5% of light stabilizer, and 0.3% of catalyst to the mixture obtained in step 1. Stir and disperse for 10 minutes at a speed of 2000 rpm;

[0049] ③ Under stirring at 700 rpm, add 5% butyl acetate to the mixture obtained in step ② to adjust the viscosity to become a finished product. Viscosity: 30±3 seconds; the viscosity is measured with a DIN No.4 cup at a temperature of 23°C; the solid content is 58%;

[0050] (2) Preparation of compo...

Embodiment 3

[0054] The invention is a preparation method of a solvent-based two-component elastic polyester / polyurethane anti-wind and sand train coating. The following process steps are adopted, and the formula ratio is calculated by weight percentage:

[0055] (1) Preparation of component A main agent:

[0056] ① Pre-mix 12% elastic polyester resin, 55% acrylic modified polyester resin, and 18% propylene glycol methyl ether acetate, and stir and disperse for 6 minutes at a speed of 1200 rpm;

[0057]2. Under stirring at 700 rpm, add 5% of 3-methyl-3-methoxybutyl acetate, 4% of leveling agent, 2% of light stabilizer, and 0.4% of catalyst to the mixture obtained in step 1. Stir and disperse at a speed of 1800 rpm for 12 minutes;

[0058] ③Under stirring at 700 rpm, add 3.6% butyl acetate to the mixture obtained in step ②, and adjust the viscosity to become a finished product. Viscosity: 30±3 seconds; the viscosity is measured with a DIN No.4 cup at a temperature of 23°C; the solid conte...

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Abstract

A solvent-based two-component elastic polyester / polyurethane sandstorm resistant train coating comprises a component A main agent and a component B curing agent, and the component A comprises 6-15% of an elastic polyester resin, 48-62% of an acrylic modified polyester resin, 2-4% of a leveling agent, 1-3% of a light stabilizer, 0.2-0.4% of a catalyst, 15-20% of propylene glycol methyl ether acetate, 2-5% of butyl acetate and 3-5% of 3-methyl-3-methoxybutyl acetate; the component B comprises 75-100% of hexamethylene diisocyanate and 0-25% of propylene glycol methyl ether acetate; and a mass ratio of the component A to the component B is 5:1. The coating has the advantages of good elasticity, strong impact resistance, high gloss retention, weather resistance, corrosion resistance and good sandstorm impact resistance, and is especially suitable for high-cold sandstorm resistant trains.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a solvent-based two-component elastic polyester / polyurethane coating used for train anti-wind and sand and a preparation method thereof. Background technique [0002] With the continuous development of my country's high-speed locomotive technology, high-speed train lines have been extended to the central and western regions. However, the climatic conditions in this area are very harsh, mainly reflected in the high altitude, strong ultraviolet radiation, large temperature difference between day and night, violent sandstorms, etc., which can easily cause serious damage to the coating surface of locomotives running at high speed. Lanzhou-Urumqi EMU trains are the first batch of high-cold and sand-resistant trains in the northwest of my country. At present, they have entered the stage of line experiment. The train design speed is 250km / h, which is much higher than the speed of low-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D175/14C09D7/12
Inventor 王鹏鹏
Owner 卡秀万辉(无锡)高新材料有限公司
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