Composite aqueous UV coating

A paint and water-based technology, which is applied in the field of composite water-based UV paint and its preparation, can solve the problems of active diluent safety and sanitation, long-term performance adverse effects, skin irritation, etc., to reduce production risk, low equipment requirements, and reduce energy consumption effect

Inactive Publication Date: 2012-06-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, although the reactive diluent has low volatility and less environmental pollution, it becomes a part of the coating film after curing, but it has a strong smell and is irritating to the skin. It is difficult to fully cure the reactive diluent during the UV curing process. , the residual active diluent will adversely affect the safety, sanitation and long-term performance of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Preparation of Water-Soluble Epoxy Acrylic Grafted Urethane Resin

[0028] 200g of polypropylene glycol diglycidyl ether, 1.5g of hydroquinone and 3g of triphenylphosphine were added to the reaction kettle equipped with stirrer, nitrogen, condenser, constant pressure dropping funnel and thermometer, and the temperature was raised to 85°C with stirring , use a constant pressure dropping funnel to slowly add 86 g of methacrylic acid with a molar equivalent ratio of epoxy group to carbonyl group of 1:1, and the dropwise addition is completed within 1 hour, and the temperature is raised to 110 ° C. After 2 hours of reaction, samples are taken at regular intervals to measure Its acid value, when acid value is less than or equal to 5mgKOH / g, stops reaction, makes epoxy acrylic resin;

[0029] Cool down to 60°C, slowly add dropwise a mixture containing 223.3g of isophorone diisocyanate, 0.05g of dibutyltin dilaurate and 2g of hydroquinone, drop over 0.5h, continue the ...

Embodiment 2

[0035] The first step: preparation of polyoxyethylene ether type acrylate

[0036]Add 223.3 g of isophorone diisocyanate into a reaction kettle equipped with a stirrer, nitrogen, condenser, constant pressure dropping funnel and thermometer, slowly raise the temperature to 50°C, slowly add 300 g of polyoxyethylene ether containing fatty alcohol, The mixture of 0.05g of dibutyltin dilaurate and 2g of hydroquinone is finished after 0.5h, and the reaction is continued until the NCO value is stable, and then 118g of 2-hydroxyethyl acrylate is slowly added dropwise with a constant pressure dropping funnel, and the dropwise addition is completed Afterwards, the temperature was raised to 75° C. During the reaction, the degree of progress of the reaction was monitored by sampling and detecting the content of NCO in the reaction mixture. When the content of NCO was stable, that is, <0.3gNCO / 100g, 9.7g of triethylamine was added for neutralization to prepare Obtain polyoxyethylene ether ...

Embodiment 3

[0042] Step 1: Preparation of Water-Soluble Epoxy Acrylic Grafted Urethane Resin

[0043] 200g of polypropylene glycol diglycidyl ether, 1.5g of hydroquinone and 3g of triphenylphosphine were added to the reaction kettle equipped with stirrer, nitrogen, condenser, constant pressure dropping funnel and thermometer, and the temperature was raised to 85°C with stirring , use a constant pressure dropping funnel to slowly add 86 g of methacrylic acid with a molar equivalent ratio of epoxy group to carbonyl group of 1:1, and the dropwise addition is completed within 1 hour, and the temperature is raised to 110 ° C. After 2 hours of reaction, samples are taken at regular intervals to measure Its acid value, when acid value is less than or equal to 5mgKOH / g, stops reaction, makes epoxy acrylic resin;

[0044] Cool down to 60°C, slowly add dropwise a mixture containing 223.3g of isophorone diisocyanate, 0.05g of dibutyltin dilaurate and 2g of hydroquinone, drop over 0.5h, continue the ...

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Abstract

The present invention discloses a composite aqueous UV coating, which comprises the following components by mass 0.1-48 parts of polyoxyethylene acrylate, 0.1-48 parts of water-soluble epoxy acrylic grafted urethane resin, 0.3-5 parts of additive, 2-5 parts of photoinitiator, 0.03- 0.8 parts of defoamer, 0.03-0.6 parts of wetting agent, 30-75 parts of deionized water; wherein at least one of polyoxyethylene acrylate and water-soluble epoxy acrylic grafted urethane resin is required. The preparation method comprises the following steps weighting the components by mass ratio, then mixing polyoxyethylene acrylate and water-soluble epoxy acrylic grafted urethane resin to obtain a mixture, and then adding the photoinitiator, the defoamer, the wetting agent and the aqueous additive in the mixture, stirring for 1-2 hours, and then slowly adding 0.1-5% of etherified melamine aqueous solution by using a phase inversion method. The UV coating of the present invention has advantages of good adhesion on all kinds of materials, environmental protection and no toxicity, high film hardness, excellent glossiness and fluid resistance performance.

Description

technical field [0001] The invention relates to a coating and a preparation method thereof, in particular to a composite water-based UV coating and a preparation method thereof. Background technique [0002] At present, water-based light-curing coatings mainly disperse the resin in the form of particles or droplets through physical or chemical methods, and use water as the continuous dispersion medium to obtain a stable dispersion system, which must have hydrophilic groups and unsaturated groups. The group can be cured and cross-linked into a network interpenetrating structure under UV irradiation, so as to obtain good bonding performance and dimensional stability. According to different water-based methods, it is classified into chemical modification method and external emulsification method. Chemical modification method refers to the introduction of hydrophilic groups or molecular segments with surface activity on the main chain molecules of oligomer resins to make them I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C08G18/67
Inventor 张水洞林亚庆梁树兵郑索花
Owner SOUTH CHINA UNIV OF TECH
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