Wear-resisting scratch-resisting weather-proof polyurethane coating and preparation method thereof

A polyurethane coating and weather-resistant technology, which is applied in polyurea/polyurethane coatings, polyester coatings, coatings, etc., can solve the problems of reducing paint film, etc., and achieve excellent weather resistance, high gloss, decorative properties, and good scratch resistance Effect

Active Publication Date: 2010-08-04
DE LAITTERN ENVIRONMENTAL COATING BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional way to improve the wear resistance and scratch resistance of the above-mentioned paint film is to adjust the resin formula, such as increasing the content of hard monomers in the polymer to increase the hardness of the paint film and other methods to improve the scratch resistance of the paint film. Although the above methods can be used to a certain extent Improve the wear resistance and scratch resistance of the paint film, but at the same time reduce some other properties of the paint film, such as impact resistance, aging resistance, adhesion, etc.

Method used

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  • Wear-resisting scratch-resisting weather-proof polyurethane coating and preparation method thereof
  • Wear-resisting scratch-resisting weather-proof polyurethane coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] In Example 1, the raw materials are all commercially available products, the hydroxyl-containing acrylic resin in component A is Desmophen A870BA of Bayer, the polyester resin is Desmophe 670BA, and the fluorocarbon resin is selected from Dalian Zhenbang F-100; The nano-scale titanium dioxide is DuPont R-960 rutile titanium dioxide, the nano-titanium dioxide is VK-TO6S nano-rutile titanium dioxide from Hangzhou Wanjing New Material Co., Ltd., and the nano-silica is nano-silica dispersion from BYK BYK-3650; the dispersant is BYK-110 from BYK; the defoamer and leveling agent are BYK-066N and BYK-358N from the company; the light stabilizer is Tinuvin292 from Ciba; the catalyst is OMG The environmentally friendly catalyst Kat 0245; the polyisocyanate curing agent in the B component is Bayer's Desmodur N 3390BA / SN and Desmodur Z 4470MPA / X. The dehydrating agent is selected from Additive TI of OMG Company.

[0062] Preparation of wear-resistant, scratch-resistant and weather...

Embodiment 2

[0093] In component A of Example 2, the fluorocarbon resin is JF-2X from Changshu Zhonghao; the nano-silica is Degussa modified hydrophobic fumed silica AEROSIL R9200. AEROSIL R9200 is a hydrophobic fumed silica treated with special chemical and mechanical methods. This silica does not contain primary particles but exists in the form of agglomerates. OMG Company PaintAdditive OL 17 was added as the leveling agent, and the other raw materials were the same as in Example 1.

[0094] The preparation of embodiment 2:

[0095] A component comprises the composition of following parts by weight, based on the total weight of A component:

[0096] Hydroxy-containing acrylic resin: Desmophen A870BA 28.5

[0097] Fluorocarbon resin JF-2X 19.5

[0098] Polyester resin Desmophe 670BA 6.00

[0099] Rutile titanium dioxide R-960 22.0

[0100] Nano rutile titanium dioxide VK-TO6S 1.00

[0101] Hydrophobic fumed silica R9200 4.75

[0102] Dispersant: BYK-110 1.15

[0103] Leveling agen...

Embodiment 3

[0128] In the component A of Example 3, the fluorocarbon resin was selected from JF-2X of Changshu Zhonghao; the nano-silica was selected from Degussa modified hydrophobic fumed silica dispersion as AERODISP 1030, and the others were the same as in Example 2.

[0129] The preparation of embodiment 3:

[0130] A component comprises the composition of following parts by weight, based on the total weight of A component:

[0131] Hydroxy-containing acrylic resin: Desmophen A870BA 28.5

[0132] Fluorocarbon resin JF-2X 19.5

[0133] Polyester resin Desmophe 670BA 6.0

[0134] Non-nanometer rutile titanium dioxide R-960: 22.0

[0135] Nano rutile titanium dioxide VK-TO6S 1.0

[0136] Hydrophobic gas phase dioxide dispersion AERODISP 1030 10.0

[0137] Dispersant: BYK-110 0.50

[0138] Leveling agent: BYK-358N 0.3

[0139] Paint Additive OL 17 0.2

[0140] Defoamer: BYK-066N 0.2

[0141] Anti-settling agent: BYK-410 0.3

[0142] Light stabilizer: Tinuvin 292 1.3

[0143] C...

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Abstract

The invention relates to a double-component polyurethane coating and a preparation method thereof. The coating comprises a component A and a component B, wherein the component A comprises hydroxyl-containing acrylic resin, fluorocarbon resin, polyester resin, non-nanoscale titanium white, nanometer titanium dioxide, nanometer silicon dioxide and various auxiliary agents; and the component B comprises polyisocyanate curing agent, solvent and moisture scavenger. The component A and the component B are mixed at the weight ratio of 4:1-5:1 to obtain the polyurethane coating. The coating has excellent wear resistance, scratch resistance and weather proofness, has favorable decoration, and is suitable for coating the surfaces of rapid trains, automobiles and the like which have higher requirements on decoration and physiochemical performance.

Description

technical field [0001] The invention relates to a two-component polyurethane coating and a preparation method thereof, which is especially suitable for surface coating of high-speed trains, automobile buses and the like. Background technique [0002] Due to the high speed of urban high-speed trains, there are correspondingly high requirements for the aesthetics and anti-corrosion of the trains while having high technical requirements for the trains. China has a vast territory, and the ambient temperature and climatic conditions that the train crosses vary greatly and are very complicated. When trains and cars are running at high speed, they will encounter wind, sand, rain, snow, etc. Foreign objects such as wind, sand, dust, stones, etc. will scratch the paint film. light phenomenon. Wear resistance and scratch resistance mean that the paint film can maintain the original luster and decorative effect of the paint for a long time during use. [0003] The traditional way to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D127/12C09D167/00C09D7/12
Inventor 林志宏张雅琴陈庚
Owner DE LAITTERN ENVIRONMENTAL COATING BEIJING
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