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Spraying polyurea elastic anticorrosive paint, and preparation method thereof

An anti-corrosion coating and elastic technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of high strength, average impact resistance, and easy occurrence of hollowing of sprayed polyurea protective materials, so as to improve the flow rate. The effect of flattening performance, improving tensile strength, and improving softness performance

Active Publication Date: 2019-01-22
CRRC YANGTZE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strength of sprayed polyurea protective material is too high, the elongation is less than 300%, the impact resistance is average, and defects such as hollowing and delamination are prone to occur under high-frequency impact

Method used

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  • Spraying polyurea elastic anticorrosive paint, and preparation method thereof
  • Spraying polyurea elastic anticorrosive paint, and preparation method thereof
  • Spraying polyurea elastic anticorrosive paint, and preparation method thereof

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preparation example Construction

[0047] On the other hand, based on the same inventive concept, the embodiment of the present application provides a preparation method of the polyurea elastic anticorrosion coating, comprising the following steps:

[0048](1) Add the polyether polyol into the reaction kettle, dehydrate under the vacuum condition of 100-140°C and vacuum degree of 0.06-0.1MPa until the moisture is qualified; then turn off the vacuum pump, lower the temperature to 50-70°C, add MDI- 50, mix evenly, slowly raise the temperature to 80-90°C, react at constant temperature for 1-3h, take a sample to measure the NCO content, after reaching the set result, cool down to 40-50°C and discharge to obtain the A component.

[0049] (2) Mix the amino chain extender, additives, amino-terminated polyether, and color paste, put them into the reaction kettle, vacuum dehydrate at 100-140°C, and filter the material after the moisture test is qualified to obtain the B component.

[0050] (3) When using, use a spraying...

Embodiment 1

[0054] According to the proportion by mass, 40 parts of polyether polyol (N220) and 10 parts of polyether polyol (N330) produced by Jiangsu Jinqi Company were added to the reaction kettle, and dehydration was carried out at 120°C and vacuum degree of 0.08MPa for 2h to Moisture is acceptable. Then turn off the vacuum pump, lower the temperature to 60°C, add 49 parts of isocyanate (MDI-50) produced by Yantai Wanhua Company, and 1 part of stabilizer, mix well, slowly heat up to 80°C, and react at constant temperature for 2 hours. Take samples to measure the NCO content, reaching After the set result is 13-16%, the temperature is lowered to 40°C and the material is discharged to obtain the A component.

[0055] According to the ratio by mass, 54 parts of amino-terminated polyether (D-2000) produced by American Huntsman Company, 5 parts of amino-terminated polyether (T-5000), 1 part of auxiliary agent, and amino chain extender produced by American Yabao Company 12 parts of (E-100)...

Embodiment 2

[0058] According to the proportion by mass, add 36 parts of polyether polyol (N220) and 12 parts of polyether polyol (N330) produced by Jiangsu Jinqi Company into the reaction kettle, and dehydrate for 2 hours at 120°C and vacuum degree of 0.08MPa until the moisture content is acceptable. Then turn off the vacuum pump, lower the temperature to 60°C, add 50.5 parts of isocyanate (MDI-50) produced by Yantai Wanhua Company, and 0.5 parts of stabilizer, mix well, slowly heat up to 80°C, react at constant temperature for 2 hours, and take samples to measure the NCO content. After reaching 13% to 16% of the set result, cool down to 40°C and discharge to obtain the A component.

[0059] According to the proportion by mass, 52 parts of amino-terminated polyether (D-2000) produced by Huntsman Company of the United States, 6 parts of amino-terminated polyether (T-5000) and 0.5 parts of additives, amino chain extension products produced by Yabao Company of the United States Mix 15 parts...

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Abstract

The invention provides a spraying polyurea elastic anticorrosive paint, and a preparation method thereof. The spraying polyurea elastic anticorrosive paint comprises, by weight, a component A and a component B; the component A comprises 30 to 40 parts of polyether polyol N220, 10 to 20 part of polyether polyol N330, and 30 to 60 part of isocyanate MDI-50; the component B comprises 40 to 60 parts of amine-terminated polyether D-2000, 5 to 10 parts of amine-terminated polyether T-5000, 10 to 20 parts of amino chain extender E-100, and 20 to 30 parts of amino chain extender 6200. The spraying polyurea elastic anticorrosive paint possesses high frequency impact resistance, no shedding or cracking is caused after 2 million times of impacting; the bonding strength is 10Mpa or higher; 3000h saltspray resistance test is passes; the physical strength is high (>=19Mpa), the physical elongation percentage is high (>=450%), the impact resistance is excellent, and the other physical mechanical properties are capable of satisfying requirements in spraying polyureas protection material standard.

Description

technical field [0001] The invention belongs to the technical field of paint preparation, in particular to a spray polyurea elastic anticorrosion paint and a preparation method thereof. Background technique [0002] The anti-impact, wear-resistant and anti-corrosion quality of the inner wall coating of railway vehicles, especially railway wagons, plays an important role in the performance and service life of the vehicles. At present, the traditional paint anti-corrosion coatings used in the body and outer walls of railway wagons are mainly based on alkyd primers, alkyd topcoats, or ring primers and alkyd topcoats. Abrasion and impact resistance are poor. During the transportation of goods, large areas of corrosion on the inner and outer walls of the car body often occur within a short period of time, especially on the inner surface of the car body. The phenomenon that the protective coating on the overall inner surface is completely peeled off will have a serious impact on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D5/08
CPCC09D5/08C09D175/02
Inventor 陶加法肖祥湘周增光陈文兴陈强肖艳刘军祥
Owner CRRC YANGTZE CO LTD
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