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UV cured aqueous plastic coating and preparation method thereof

A technology of plastic coating and ultraviolet light, applied in the field of coatings, can solve the problems of poor adhesion and easy falling off, and achieve the effects of small particle size, good adhesion and high stability

Active Publication Date: 2016-03-23
CHINA ACADEMY OF ENG PHYSICS FUNCTION MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current UV-curable water-based plastic coatings have poor adhesion and are easy to fall off.

Method used

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  • UV cured aqueous plastic coating and preparation method thereof
  • UV cured aqueous plastic coating and preparation method thereof
  • UV cured aqueous plastic coating and preparation method thereof

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preparation example Construction

[0043] Such as figure 1 As shown, the preparation method of a UV-curable water-based plastic coating in one embodiment can be used to prepare the above-mentioned UV-curable water-based plastic coating. The preparation method of this ultraviolet curing water-based plastic coating comprises the steps:

[0044] Step S110: Weigh the following components according to mass percentage: 25-40% polyurethane acrylate prepolymer, 15-30% reactive diluent, 2-6% photoinitiator, 0.1-1% fluid Leveling agent, 0.1-1% dispersant, 0.1-1% defoamer and 40-50% deionized water.

[0045] Among them, the urethane acrylate prepolymer can be purchased. Preferably, the polyurethane acrylate prepolymer is prepared through the following steps:

[0046] Step S112: under the condition of protective gas, add 47-100 parts by mass of dihydric alcohol to 16-58 parts by mass of diisocyanate, stir and react at 50-70°C for 3-4 hours to obtain the first The reaction solution.

[0047] Wherein, the protective gas...

Embodiment 1

[0066] The preparation process of the UV-curable water-based plastic coating of the present embodiment is as follows:

[0067] (1) Preparation of urethane acrylate prepolymer: under the condition of nitrogen, add 25g of toluene diisocyanate to a four-hole round-bottomed reaction flask equipped with a thermometer, a condenser tube and a stirring rod, and 65g of polycaprolactone diisocyanate Slowly add the alcohol dropwise into the round bottom flask, stir and react at 65°C for 3.5h to obtain the first reaction liquid; continue to add 6g of dimethylol propionic acid, and dropwise add 0.1g of dibutyltin dilaurate, stir and react at 75°C 1h; cool down to 60°C, add 6g of hydroxyethyl methacrylate, 6.2g of pentaerythritol triacrylate and 0.07g of polymerization inhibitor, react for 1h, adjust the viscosity with an appropriate amount of acetone, then raise the temperature to 75°C for 4h; cool down to 45°C , add 4.5g of triethylamine, react for 0.5h, and obtain a transparent polyureth...

Embodiment 2

[0072] The preparation process of the UV-curable water-based plastic coating of the present embodiment is as follows:

[0073] (1) Preparation of urethane acrylate prepolymer: under the condition of nitrogen, add 30g of dicyclohexylmethane diisocyanate to a four-necked round-bottom reaction flask equipped with a thermometer, a condenser tube and a stirring rod, and 45g of polyether Dihydric alcohol was slowly added dropwise to the round bottom flask, stirred and reacted at 50°C for 3 hours to obtain the first reaction liquid; continue to add 3 g of dimethylol propionic acid, and dropwise added 0.1 g of dibutyltin dilaurate, and stirred at 70°C for reaction 1h; cool down to 50°C, add 2g of hydroxyethyl acrylate, 9.5g of pentaerythritol triacrylate and 0.07g of polymerization inhibitor, react for 1h, adjust the viscosity with an appropriate amount of acetone, then raise the temperature to 75°C for 3h; cool down to 45°C, add 2.3 g of triethylamine was reacted for 1 hour, and a tr...

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Abstract

A UV-cured aqueous plastic coating comprises a polyurethane acrylate prepolymer, an active diluent, a light initiator, a levelling agent, a dispersant, an antifoaming agent, and deionized water, wherein the active diluent is hexanediol diacrylate. The active diluent (hexanediol diacrylate) has a very good osmotic swelling effect on polyurethane acrylate prepolymer and increases the adhesion force of the plastic coating on a plastic plate. Without any emulsifier, UV cured aqueous plastic coating having the advantages of small particle size, high stability, good film-forming property and high adhesiveness can be obtained, and thus the shortage that waterproof property and stability of plastic coating are influenced by a conventional emulsifier is overcome. The invention also provides a preparation method of the UV cured aqueous plastic coating.

Description

technical field [0001] The invention relates to the field of coatings, in particular to an ultraviolet light curing water-based plastic coating and a preparation method thereof. Background technique [0002] Ultraviolet (UV) curing coatings, after more than half a century of development, water-based UV curing coatings have become a relatively mature technology, especially with the improvement of people's awareness of environmental protection, production and researchers pay more attention to the development and application of UV curing coatings . UV curing coating is a kind of green and environment-friendly coating, which fully complies with the "4E" principle. Generally, the energy consumption of UV curing is 1 / 5 of that of thermal curing, and UV curing coating contains less volatile components and less pollution. It is most attractive to researchers. And the developer's advantage is that UV curing coatings can reduce raw material consumption, which is beneficial to reduce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C08G18/66C08G18/67
CPCC08G18/6659C08G18/6692C08G18/672C09D175/14
Inventor 刘键姚志刚景梅
Owner CHINA ACADEMY OF ENG PHYSICS FUNCTION MATERIAL RES INST
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