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A kind of water-based anti-graffiti paint and preparation method thereof

An anti-graffiti and coating technology, applied in anti-fouling/underwater coatings, coatings, paints containing biocides, etc., can solve the problems of long-term effectiveness and environmental protection of anti-graffiti coatings, and achieve long-term environmental protection. , low VOC emission, low VOC emission effect

Active Publication Date: 2017-08-25
HANGZHOU JIHUA POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of the existing oil-based fluorine-containing low surface energy anti-graffiti coatings with insufficient long-term effectiveness and environmental protection, the present invention provides a water-based anti-graffiti coating and a preparation method thereof. The coating has excellent weather resistance, anti-graffiti Ultraviolet resistance, wear resistance, low surface energy and excellent anti-contamination and anti-graffiti performance, and also has the characteristics of low VOC emission, environmental protection and non-toxic

Method used

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  • A kind of water-based anti-graffiti paint and preparation method thereof
  • A kind of water-based anti-graffiti paint and preparation method thereof
  • A kind of water-based anti-graffiti paint and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (1) Preparation of Fluorosilicone Modified Polyurethane Core-Shell Emulsion

[0043] 20 moles of toluene diisocyanate, 5 moles of polypropylene glycol with a molecular weight of 1000, and 5 moles of hydroxyl silicone oil with a molecular weight of 1000 were reacted at 70°C for 4 hours to obtain a silicone-modified polyurethane prepolymer containing -NCO active end groups , and then add 5 molar parts of 1,4-butanediol and 5 molar parts of 2,2-dimethylol propionic acid for chain extension reaction, react at 70°C for 4 hours, cool down to 45°C, add triethylamine to proceed and react for 15 minutes, the pH is 7, add deionized water with a weight of 1 times that of the polyurethane prepolymer, and then emulsify and disperse at a high speed of 1800 rpm for 15 minutes to obtain a silicone-modified polyurethane aqueous dispersion 1;

[0044] 40 parts by weight of silicone-modified polyurethane aqueous dispersion 1 was used as seed emulsion, 0.5 parts by weight of OP-10 and 10 p...

Embodiment 2

[0049] (1) Preparation of Fluorosilicone Modified Polyurethane Core-Shell Emulsion

[0050] 40 molar parts of diphenylmethane diisocyanate, 10 molar parts of polytetrahydrofuran diol with a molecular weight of 1000, and 10 molar parts of hydroxyl silicone oil with a molecular weight of 1000 were reacted at 90°C for 2 hours to obtain a modified silicone containing -NCO active end group. Polyurethane prepolymer, then add 10 mole parts of 1,4-butanediol and 10 mole parts of 2,2-dimethylolpropionic acid for chain extension reaction, react at 90°C for 2 hours, cool to 60°C, add Triethylamine was neutralized for 30 minutes, the pH was 6, and deionized water twice the weight of the polyurethane prepolymer was added to emulsify and disperse at a high speed of 2500 rpm for 30 minutes to obtain a silicone-modified polyurethane aqueous dispersion 2;

[0051] 80 parts by weight of organosilicon-modified polyurethane aqueous dispersion 2 was used as seed emulsion, 2 parts by weight of OP-1...

Embodiment 3

[0056] (1) Preparation of Fluorosilicone Modified Polyurethane Core-Shell Emulsion

[0057] 30 molar parts of hexamethylene diisocyanate, 7 molar parts of polytetrahydrofuran diol with a molecular weight of 2000, and 7 molar parts of hydroxyl silicone oil with a molecular weight of 2000 were reacted at 80°C for 3 hours to obtain a modified silicone containing -NCO active end group. Polyurethane prepolymer, then add 7 mole parts of 1,4-butanediol and 7 mole parts of 2,2-dimethylolpropionic acid for chain extension reaction, react at 80°C for 3 hours, cool to 50°C, add Triethylamine was neutralized for 20 minutes, the pH was 8, deionized water with a weight of 1.5 times the weight of the polyurethane prepolymer was added, and it was emulsified and dispersed at a high speed of 2000 rpm for 20 minutes to obtain a silicone-modified polyurethane aqueous dispersion 3;

[0058] 60 parts by weight of silicone-modified polyurethane aqueous dispersion 3 was used as seed emulsion, 1 part ...

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Abstract

The invention relates to the field of organic high-molecular compounds. In order to solve the problem of deficiency in long residual action and environment friendliness in the existing oil-based fluorine-containing low-surface-energy anti-doodling paint, the invention provides a water-based anti-doodling paint and a preparation method thereof. The preparation method comprises the following steps: adding a pigment, a filler and a dispersing agent into a toning cylinder, mixing, adding into a grinder, and grinding until the fineness is less than 20 mu m to obtain a color paste; and adding deionized water, the color paste, a fluorine-silicon-modified polyurethane core-shell emulsion, a preservative and a mildew preventive into a dispersion cylinder, mixing, sequentially adding a film forming assistant, a defoaming agent a thickener, mixing, and discharging to obtain the water-based anti-doodling paint. The film formed by the paint has the characteristics of excellent weather resistance, excellent ultraviolet resistance, excellent wear resistance, low surface energy, excellent pollution resistance, excellent doodling resistance, low VOC (volatile organic compound) emission, environment friendliness and no toxicity.

Description

technical field [0001] The invention relates to an anti-graffiti paint and a preparation method thereof, in particular to a water-based anti-graffiti paint and a preparation method thereof. Background technique [0002] Malicious graffiti is a pain for city managers. The cost of graffiti removal in various countries is huge. The UK spends 200 million pounds a year on graffiti removal, while the United States costs more than 20 billion pounds. The loss caused by malicious graffiti has attracted more and more attention. At present, the most effective anti-graffiti technology is to coat a layer of anti-graffiti paint on the surface of objects, making graffiti difficult or easy to remove. Giving the surface of the object a layer of low surface energy antifouling coating can effectively prevent the adhesion and pollution of graffiti, and even the pollution can be easily removed by simple wiping. The currently known compounds with the lowest surface energy are organic fluorines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/08C09D5/16C09D7/12C08G18/66C08G18/48C08G18/61C08G18/12C08F283/00C08F220/14C08F220/18
CPCC08F283/004C08G18/0823C08G18/12C08G18/4009C08G18/4825C08G18/4854C08G18/61C08K13/02C08K13/04C09D5/1662C09D5/1687C09D151/08C08G18/3206C08G18/348C08F220/18
Inventor 钱涛刘海龙刘海兵
Owner HANGZHOU JIHUA POLYMER MATERIAL CO LTD