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Organic silicon-modified water-based UV (ultraviolet) coating and preparation method thereof

A silicone and modified technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor coating stability, poor water resistance, gloss, hardness, adhesion, aging resistance and wear resistance, etc. Achieve the effects of excellent adhesion and wear resistance, excellent aging resistance and solvent resistance, and fast curing rate

Active Publication Date: 2014-02-05
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] (1) Water-based UV curing coatings have good hydrophilicity and relatively poor water resistance;
[0014] (2) The linking materials in water-based UV-curable coatings, such as polyurethane acrylate or epoxy acrylate polymers, are usually synthesized by "one-step method", the microscopic reaction process is not easy to control, and the resulting coating has poor stability;
[0015] (3) Compared with solvent-based coatings, there is still a big gap in comprehensive properties such as gloss, hardness, adhesion, aging resistance, and abrasion resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Under nitrogen protection, 7.5g polyethylene glycol (molecular weight is 400), 10.5g methyl hydroxy silicone oil (the mass percentage of hydroxyl group is 6%), 13.05g toluene-2,4-diisocyanate and 0.0135g dilauric acid were mixed Dibutyltin was added to the four-necked flask, and the reaction was stirred at 40°C for 3h; 2.115g of dimethylolpropionic acid was added, and the reaction was performed at 75°C for 1.5h; The reaction was carried out at ℃ for 4 h, and 6.39 g of acetone was added during the reaction to adjust the viscosity; the temperature was lowered to 50 ° C, and 1.83 g of triethylamine was added to neutralize it into a salt. Obtain silicone-modified hyperbranched water-based polyurethane;

[0042] Under nitrogen protection, 17.4g of hydroxyethyl acrylate, 0.0023g of hydroquinone, 13.05g of toluene-2,4-diisocyanate and 0.0135g of dibutyltin dilaurate were added to a four-necked flask, and the reaction was carried out under stirring at 40°C 3h, adding 3.75g of ...

Embodiment 2

[0048] Under nitrogen protection, 3.33g polyethylene glycol (molecular weight is 400), 14.16g methyl hydroxy silicone oil (the mass percentage of hydroxyl group is 6%), 6.525g toluene-2,4-diisocyanate and 0.0015g dilauric acid were mixed Dibutyltin was added to the four-necked flask, and the reaction was stirred at 50°C for 2 hours; 0.66g of dimethylolpropionic acid was added, and the reaction was performed at 70°C for 2 hours; In the reaction process, 4.59g of acetone was added to adjust the viscosity; the temperature was lowered to 50°C, 0.45g of triethylamine was added to neutralize and form a salt, and 22.5g of deionized water was added under the condition of stirring at 1000rpm, and stirred at room temperature for 1h to prepare Obtain silicone-modified hyperbranched waterborne polyurethane;

[0049] Under nitrogen protection, 4.35g of hydroxyethyl methacrylate, 0.00015g of hydroquinone, 5.835g of toluene-2,4-diisocyanate and 0.0015g of dibutyltin dilaurate were added to a...

Embodiment 3

[0055] Under nitrogen protection, 5g polycaprolactone diol (molecular weight is 1000), 8.5g methylphenyl hydroxy silicone oil (the mass percentage of hydroxyl group is 8%), 13.05g toluene-2,4-diisocyanate and 0.018 g g dibutyltin dilaurate was added to the four-necked flask, and the reaction was stirred at 60 °C for 1 h; 2 g of dimethylolpropionic acid was added, and the reaction was conducted at 80 °C for 1 h; 3.94 g of diethanolamine was added, and the reaction was carried out at -5 °C for 1.5 h , react at 80°C for 2h, add 9.47g acetone during the reaction to adjust the viscosity; cool down to 50°C, add 1.52g triethylamine to neutralize and form a salt, add 30g deionized water under the condition of stirring at 1000rpm, and stir at room temperature 1.5h, the silicone-modified hyperbranched water-based polyurethane was prepared;

[0056] Under nitrogen protection, 3.25g of hydroxyethyl methacrylate, 2.9g of hydroxyethyl acrylate, 0.0018g of hydroquinone, 13.06g of toluene-2,4...

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PUM

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Abstract

The invention relates to an organic silicon-modified water-based UV (ultraviolet) coating and a preparation method thereof, and belongs to the technical field of environment-friendly coatings. The organic silicon-modified water-based UV coating comprises the following components in percentage by mass: 30 to 55 percent of organic silicon-modified hyperbranched water-based urethane acrylate, 20 to 50 percent of filler, 1 to 10 percent of photoinitiator, 0 to 3 percent of auxiliaries and 5 to 30 percent of water. The preparation method comprises the following steps: fully grinding the organic silicon-modified hyperbranched water-based urethane acrylate, the filler and water in a proportion, performing dispersion for 1 to 2 hours at 40 to 50 DEG C at a rotating speed of 400 to 600rpm, adding the photoinitiator and the auxiliaries, and uniformly stirring and standing a mixture to obtain the water-based UV coating. The coating is environment-friendly, nontoxic, high in curing speed, stability, aging resistance, solvent resistance, adhesive power and abrasion resistance and suitable for a plurality of coating modes and production requirements, and can be widely applied to the surfaces of automobiles, electronic products, ships, furniture and packaging printing materials.

Description

[0001] technical field [0002] The invention relates to an organosilicon-modified water-based UV coating and a preparation method thereof, belonging to the technical field of environmental protection coatings. Background technique [0003] Traditional solvent-based coatings are mainly composed of fillers, binders, organic solvents and additives. VOC (volatile organic compound) emissions are large, causing serious environmental pollution, which poses a huge threat to air quality, packaging contents and human health. Water-based coatings use water as a solvent instead of organic solvents, which significantly reduces VOC emissions, prevents air pollution, does not affect human health, and has good overall performance. It is widely used in industries such as automobiles, electronics, furniture, and packaging and printing. UV curable coatings mainly include prepolymers, photoinitiators, pigments, reactive diluents and additives. Because of their fast curing rate, low environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/12C08G18/81C08G18/66C08G18/61
Inventor 刘兴海杨耀黄驰黎厚斌
Owner WUHAN UNIV
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