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Composite ultraviolet solidified aqueous coating and preparation method thereof

A technology of water-based paint and ultraviolet light, which is applied in the direction of coating, latex paint, etc., can solve the problems of brittleness and poor flexibility

Inactive Publication Date: 2008-05-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the many photosensitive oligomers, epoxy-acrylate is the most widely used one in light-curing coatings. The cured film formed has high hardness, high gloss, high tensile strength, and excellent chemical resistance. But there are also disadvantages of brittleness and poor flexibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: at first prepare epoxy-acrylic acid ester: add epoxy resin, hydroquinone and N, N-dimethylaniline in the there-necked flask that separatory funnel and stirring device are housed, after stirring evenly, use Acrylic acid was slowly added dropwise through the liquid funnel, and the drop was completed within 1 hour. The temperature was raised to 60° C., stirred at a rotation speed of 100 rpm, reacted for 3 hours, and cooled to room temperature. The molar ratio of epoxy resin:acrylic acid is 1:1, hydroquinone accounts for 0.01% by mass of the total mixture, and N,N-dimethylaniline accounts for 0.1% by mass of the total mixture.

[0028] Then prepare polyurethane-acrylate: add polyoxypropylene glycol, dimethylol propionic acid and stir in a three-necked flask equipped with a separatory funnel and a stirring device, then add toluene diisocyanate and dibutyltin dilaurate, and heat up to 60 React at ℃ for 3 hours, then gradually add β-hydroxyethyl acrylate dropwise...

Embodiment 2

[0033] Embodiment 2: at first prepare epoxy-acrylic acid ester: add epoxy resin, hydroquinone and N, N-dimethylaniline in the there-necked flask that separatory funnel and stirring device are housed, after stirring evenly, use dividing Acrylic acid was slowly added dropwise into the liquid funnel, and the drop was completed within 3 hours. The temperature was raised to 100° C., stirred at a rotation speed of 150 rpm, reacted for 8 hours, and cooled to room temperature. The molar ratio of epoxy resin:acrylic acid is 1.4:1, hydroquinone accounts for 1% by mass of the total mixture, and N,N-dimethylaniline accounts for 2% by mass of the total mixture.

[0034] Then prepare polyurethane-acrylate: add polytetrahydrofuran diol and dimethylol propionic acid to a three-necked flask equipped with a separatory funnel and a stirring device and stir, then add 4,4'-diphenylmethane diisocyanate and octanoic acid sulfide Tin, heat up to 100°C and react for 8 hours, then gradually add acrylat...

Embodiment 3

[0039] Embodiment 3: first prepare epoxy-acrylic acid ester: add epoxy resin, hydroquinone and N, N-dimethylaniline in the there-necked flask that separatory funnel and stirring device are housed, after stirring evenly, use Acrylic acid was slowly added dropwise into the liquid funnel, and the drop was completed within 2 hours. The temperature was raised to 80° C., stirred at 120 rpm, reacted for 6 hours, and cooled to room temperature. The molar ratio of epoxy resin:acrylic acid is 1.2:1, hydroquinone accounts for 0.5% by mass of the total mixture, and N,N-dimethylaniline accounts for 0.8% by mass of the total mixture.

[0040] Then prepare polyurethane-acrylate: add polyethylene glycol, dimethylol propionic acid and stir in a three-necked flask equipped with a separating funnel and a stirring device, then add hexamethylene diisocyanate and stannous octoate, and heat up to 70 React at ℃ for 5 hours, after cooling, gradually add acrylate-β-hydroxypropyl ester dropwise, raise t...

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PUM

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Abstract

The invention discloses a composite ultraviolet light curing water-based paint and a preparation method thereof. The composite UV-curable water-based paint of the present invention is prepared as follows: mix epoxy-acrylate and polyurethane-acrylate, stir for 0.5h-4h, then add water-based photoinitiator, silicone defoamer and water-based anti-corrosion Stir the mold agent for 0.5h-2h, and finally add a dispersant to disperse evenly; among them, 10-70 parts of epoxy-acrylate, 10-70 parts of polyurethane-acrylate, 1.0-8.0 parts of water-based photoinitiator, silicone defoamer 0.05-1.0 parts, 0.3-2.0 parts of water-based anti-corrosion and anti-mold agent, 10-90 parts of dispersant. The coating of the invention has excellent performance and is environmentally friendly, has no harmful influence on human body and surrounding environment, and meanwhile, its curing effect meets the national standard.

Description

Technical field: [0001] The invention belongs to the field of light chemical industry, which can be UV-curable water-based paint and its preparation method, and in particular relates to a compound type UV-curable water-based paint and its preparation method. technical background: [0002] UV-curable coatings are coatings that undergo rapid physical and chemical changes in a short period of time after being irradiated by ultraviolet light. It has the advantages of fast curing speed, energy saving, excellent coating performance, and wide application range for substrates. In addition, it does not contain volatile solvents, which is beneficial to eliminate VOC (Volatile Organic Content, volatile organic compounds) Environmental pollution is also conducive to saving organic solvents. However, since the main component used in UV-curable coatings, that is, the prepolymer, generally has a relatively high viscosity, reactive diluting monomers must be added before use to adjust its v...

Claims

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Application Information

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IPC IPC(8): C09D4/00C09D5/02
Inventor 袁文辉温垚李莉申荣平
Owner SOUTH CHINA UNIV OF TECH
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