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A kind of self-healing anti-glare waterborne polyurethane coating and preparation method thereof

A water-based polyurethane, anti-glare technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor transparency and the lack of self-healing properties of coatings, and achieve the effect of self-repairing, simple and effective self-repairing

Active Publication Date: 2019-08-20
QINGYUAN YAKOO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention is simple, the cost is low, and the synthetic polyurethane coating has good stability and excellent anti-glare performance, but the coating does not have self-repairing performance and poor transparency

Method used

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  • A kind of self-healing anti-glare waterborne polyurethane coating and preparation method thereof
  • A kind of self-healing anti-glare waterborne polyurethane coating and preparation method thereof
  • A kind of self-healing anti-glare waterborne polyurethane coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) After dehydrating 100g of polytetramethylene glycol (PTMG, 1000g / mol, Japan Mitsubishi Chemical Co., Ltd.), the temperature was lowered to 80°C; under the protection of nitrogen, 0.04g of dibutyltin dilaurate (DBTDL, American Aladdin Reagent) and 52g isophorone diisocyanate (IPDI, Bayer, Germany) were mixed homogeneously, and carried out prepolymerization reaction 1 hour;

[0045] (2) After dehydrating 19g of poly-1,4-butylene adipate diol (PBA, 1000g / mol, Asahikawa Chemical), lower the temperature to 80°C, add it to the product of step (1), and the reaction time is For 1 hour, the reaction temperature was 80°C. Samples were taken every 15 minutes to determine the end point of the reaction by n-butylamine titration. When the isocyanate value reached 4.5% (theoretical value was 5%), the temperature was cooled to 70°C;

[0046] (3) Add 7.3g dimethylolpropionic acid (DMPA, Perstorp, Sweden) to the product of step (2), the reaction time is 1 hour, and the reaction tempe...

Embodiment 2

[0053] (1) After dehydration treatment of 100g polypropylene glycol (PPG, 1000g / mol, American Dow), cool down to 70°C; under nitrogen protection, add 0.06g dibutyltin dilaurate (DBTDL, American Aladdin reagent) and 52g Isophorone diisocyanate (IPDI, Bayer, Germany) was mixed homogeneously, and carried out prepolymerization reaction for 2 hours;

[0054] (2) After dehydrating 19g of polycaprolactone diol (PCL, 1000g / mol, Sigma-Aldrich), cool down to 70°C and add it to the product of step (1). The reaction time is 1.5 hours and the reaction temperature is 70 ℃, take samples every 15 minutes and use n-butylamine titration method to judge the reaction end point, when the isocyanate value reaches 4.5% (theoretical value is 5%), cool the temperature to 70 ℃;

[0055] (3) Add 7.3g dimethylolpropionic acid (DMPA, Perstorp, Sweden) to the product of step (2), the reaction time is 2 hours, and the reaction temperature is 60°C, and every 15 minutes the sample is taken by n-butylamine tit...

Embodiment 3

[0062] (1) After dehydrating 81g of polypropylene glycol (PPG, 1000g / mol, American Dow), cool down to 70°C; under nitrogen protection, add 0.06g of dibutyltin dilaurate (DBTDL, American Aladdin reagent) and 57g Isophorone diisocyanate (IPDI, Bayer, Germany) was mixed homogeneously, and carried out prepolymerization reaction for 1 hour;

[0063] (2) After dehydration treatment of 21g poly-1,4-butylene adipate diol (PBA, 1000g / mol, Asahikawa Chemical), lower the temperature to 60°C, add to the product of step (1), and the reaction time is For 2 hours, the reaction temperature was 60°C. Samples were taken every 15 minutes to determine the end point of the reaction by n-butylamine titration. When the isocyanate value reached 7.7% (theoretical value was 8%), the temperature was cooled to 60°C;

[0064] (3) Add 6.2g dimethylol propionic acid (DMPA, Perstorp, Sweden) to the product of step (2), the reaction time is 2 hours, and the reaction temperature is 60°C, every 15 minutes the s...

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Abstract

The invention discloses anti-glare waterborne polyurethane paint with a self-repairing function and a preparation method thereof. The preparation method is characterized in that aliphatic polyether glycol subjected to dehydration treatment and diisocyanate are subjected to prepolymerization under the effect of organic tin catalyst; then, the aliphatic polyether glycol subjected to dehydration treatment is added to generate a segmented copolymer; primary chain extension is performed through dimethylolpropionic acid; neutralization is performed to form salt; deionized water and sodium sulfamate type chain extenders are subjected to emulsification and chain extension; sulfonic acid groups are introduced at a hard chain section; then, aliphatic diamine type or hydrazine chain extenders with higher reactivity is added, so that the rest isocyanate completely reacts; finally, the proper amount of auxiliary agents is mixed to obtain the waterborne polyurethane paint. The paint coating film has good diffusion performance and high transmissivity; the excellent anti-glare effect can be achieved without adding additional auxiliary agents or performing surface treatment; the coating film has the self repairing capability through a large number of reversible hydrogen bonds and sulfonic acid groups in polyurethane.

Description

technical field [0001] The invention relates to a polyurethane coating, in particular to an anti-glare water-based polyurethane coating with a self-repairing function and a preparation method thereof. Background technique [0002] Glare is caused by unreasonable and uneven light distribution, which causes a decrease in contrast and affects human observation. According to different light sources, it can be divided into direct glare and indirect glare. Direct glare refers to the feeling of dizziness caused by high-intensity light directly incident on the human eye; indirect glare is also called reflected glare, which refers to the glare caused by strong reflected light after light is reflected by a smooth surface. Glare is a serious light pollution. The common sources of glare hazards are architectural lighting, road traffic lighting, and electronic display screens. In addition, traffic accidents caused by sudden blindness of drivers caused by glare frequently occur, and peop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D175/06C08G18/66C08G18/48C08G18/42C08G18/34C08G18/12C08G18/44C08G18/32C08G18/38
Inventor 彭晓宏萧烨黄慧华方仕峰
Owner QINGYUAN YAKOO CHEM CO LTD
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