Aqueous ultraviolet cured epoxy acrylic resin and preparation method thereof

A technology of epoxy acrylate and epoxy resin, applied in the direction of epoxy resin coating, coating, etc., can solve the problems of high freezing point, low gloss of cured film, and influence on dispersion, and achieve the effect of less environmental pollution and simplified operation procedures

Active Publication Date: 2010-09-15
ZHEJIANG S H DEPON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) Without active diluent, there are no problems such as organic volatiles, irritation and odor of coalescents;
[0012] (1) There is water in the system. Before photocuring, too much water needs to be dried to remove water, and the high evaporation heat of water leads to increased energy consumption, which also prolongs production time and reduces production efficiency;
[0013] (2) The high surface tension of water is not easy to infiltrate the substrate, which is easy to cause uneven coating; the wettability of the pigment is poor, which affects the dispersion;
[0014] (3) The gloss of the cured film is low, and the water resistance and washing resistance are poor;
[0015] (4) The stability of the system is relatively poor and sensitive to pH;
[0016] (5) The freezing point of water is relatively high, and antifreeze should be added during transportation and storage; water-based systems are prone to mold growth and require antifungal agents to complicate the formula
Therefore, it can be seen from the structural analysis that ionic liquids are a large class of cationic surfactant compound series, and ionic liquids are used instead of quaternary ammonium salts for the preparation of water-based UV-curable epoxy acrylate resins. No relevant reports have been found so far.

Method used

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  • Aqueous ultraviolet cured epoxy acrylic resin and preparation method thereof
  • Aqueous ultraviolet cured epoxy acrylic resin and preparation method thereof
  • Aqueous ultraviolet cured epoxy acrylic resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0065] The preparation of embodiment 1 ionic liquid catalyst

[0066] Taking 1-octyl-3-methylimidazolium tetrafluoroborate ionic liquid as an example, the preparation method is: add 1 mole of bromooctane (reactant A) and 1 mole of N-methylimidazole (reactant B) In the three-necked flask, heat and reflux for 10 hours, after cooling to room temperature, add 5 times the volume of the reaction solution in water, then add 1mol sodium tetrafluoroborate (reactant C), stir at room temperature for 10 hours, extract with dichloromethane, no Dry over sodium sulfate, filter and concentrate to obtain 1-octyl-3-methylimidazolium tetrafluoroborate ionic liquid.

[0067] The ionic liquids a to c were prepared according to the above method steps, the difference was that the raw materials were changed, wherein the reactant A, reactant B and reactant C are shown in Table 1 below.

[0068] Table 1:

[0069] Numbering

ionic liquid

Reactant A

Reactant B

Reactant C

...

Embodiment 2

[0072] Embodiment 2 Preparation of water-based UV-curable epoxy acrylate resin

[0073] Using 3-(N-phenylcarbamoylethyl)-1-methylimidazolium hexafluorophosphate ionic liquid

[0074] In a four-neck flask equipped with a stirrer, condenser, constant pressure funnel, and thermometer, add 4 grams of hydroquinone polymerization inhibitor and 340 grams of bisphenol A epoxy resin, heat to 70 ° C, and start to drop under stirring Add 144 grams of acrylic acid and 7 grams of catalyst 3-(N-phenylcarbamoylethyl)-1-methylimidazolium hexafluorophosphate ionic liquid. After the addition is complete, the temperature is raised to 85° C., and samples are taken every half hour to determine the acid concentration. Value once, until the acid value is 4.5mgKOH / g, stop the reaction and lower the temperature. When the temperature of the above system drops to 70°C, add 7 grams of catalyst, and after fully stirring evenly, add 4 grams of hydroquinone polymerization inhibitor and 196 grams of maleic ...

Embodiment 3

[0075] Embodiment 3 Preparation of water-based ultraviolet light curing epoxy acrylate resin

[0076] Using 1-octyl-3-methylimidazolium hexafluorophosphate ionic liquid

[0077] In a four-neck flask equipped with a stirrer, condenser, constant pressure funnel, and thermometer, add 2 grams of hydroquinone polymerization inhibitor and 340 grams of bisphenol A epoxy resin, heat to 60 ° C, and start to drop under stirring Add 144 grams of acrylic acid and 2 grams of catalyst 1-octyl-3-methylimidazolium hexafluorophosphate ionic liquid, raise the temperature to 80°C after the dropwise addition, and measure the acid value by sampling every half hour until the acid value is 4.9mgKOH / g, stop the reaction and cool down. When the temperature of the above-mentioned system drops to 60°C, add 2 grams of catalyst, and after fully stirring evenly, add 2 grams of hydroquinone polymerization inhibitor and 196 grams of maleic anhydride, raise the temperature to 80°C, and measure the acid conc...

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Abstract

The invention discloses an aqueous ultraviolet cured epoxy acrylic resin, which consists of bisphenol A epoxy resin, acrylic acid and maleic anhydride in a mass ratio of 340:144:196. The preparation method of the aqueous ultraviolet cured epoxy acrylic resin comprises: in the presence of polymerization inhibitor and an ionic liquid catalyst, performing a catalytic reaction; adjusting the pH value to 6.8 to 7.2 by using alkali, and adding water to prepare emulsion of which the solid content is 65 to 75 weight percent; and adding a photoinitiator in an amount of 1 to 2 percent based on the mass of the emulsion to obtain the aqueous ultraviolet cured epoxy acrylic resin. In the invention, ionic liquid is used as the catalyst, so a polymerization reaction is accelerated and the reaction is performed in a uniform phase; and as the deionized liquid is used, the operation process is simplified, the environmental pollution is light, and the preparation method is suitable for industrial production of a certain scale and is a green and clear process route.

Description

(1) Technical field [0001] The present invention relates to a water-based ultraviolet curing epoxy acrylate resin and a preparation method thereof, in particular to a water-based ultraviolet curing epoxy acrylate resin synthesized by using acrylic acid and bisphenol A epoxy resin, maleic anhydride and ionic liquid. The preparation method of light curing epoxy acrylate resin. (2) Background technology [0002] Water-based coatings are coatings that use water as a solvent or dispersion medium. The most prominent feature of water-based coatings is that all or most of the organic solvents are replaced by water, and the film-forming substances are uniformly dispersed or dissolved in water in different ways. After drying or curing, they have similar water resistance and physical properties to solvent-based coatings. According to the form of film-forming substances in water, water-based coatings can be divided into water-soluble coatings and water-dispersible coatings. The most i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/68C08G59/14C08G59/17C09D163/10
Inventor 胡卫雅胡士满方锡武裴文
Owner ZHEJIANG S H DEPON
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