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Alicyclic epoxy acrylate prepolymer and preparation method thereof

An epoxy acrylate and cycloaliphatic technology, which is applied in the field of UV-curable resin and its preparation, can solve problems such as limiting the application range of coatings, coating yellowing, coating weather resistance, and poor aging resistance. Good UV aging resistance, overcoming aging resistance, high hardness effect

Inactive Publication Date: 2012-02-22
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The epoxy acrylate used in traditional UV-curable epoxy acrylate resin coatings is bisphenol-A type. Because its molecules contain aromatic groups, the cured coating is prone to yellowing under intense external environments. The weather resistance and aging resistance of the coating are poor, which limits the application range of the coating

Method used

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  • Alicyclic epoxy acrylate prepolymer and preparation method thereof
  • Alicyclic epoxy acrylate prepolymer and preparation method thereof
  • Alicyclic epoxy acrylate prepolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (a) 0.91g4-methoxyphenol, 1.80g tetramethylammonium chloride are dissolved in 81.36g acrylic acid;

[0046] (b) Add 100.0 g of alicyclic epoxy resin to a four-necked round-bottomed flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, protect it with nitrogen, stir and heat up to 50 ° C, and the mixture solution in (a) Transfer to constant pressure dropping funnel, drop in the flask in 60min; The structural formula of above-mentioned cycloaliphatic epoxy resin is:

[0047]

[0048] (c) The temperature of the reactants in the flask is raised to 65°C, kept for 1 hour, then raised to 75°C, kept warm for 2 hours, and finally raised to 85°C for 4 hours;

[0049] (d) Measure the acid value of the reaction solution, its acid value is 5.65mgKOH / g, stop the reaction, cool to room temperature and discharge to obtain alicyclic epoxy acrylate prepolymer 1-1, its structural formula is:

[0050]

Embodiment 2

[0052] (a) 0.79g 4-methoxyphenol, 1.58g tetramethylammonium chloride are dissolved in 57.90g acrylic acid;

[0053] (b) Add 100.0 g of alicyclic epoxy resin to a four-necked round-bottomed flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, protect it with nitrogen, stir and heat up to 50 ° C, and the mixture solution in (a) Transfer to constant pressure dropping funnel, drop in the flask in 60min; The structural formula of above-mentioned cycloaliphatic epoxy resin is:

[0054]

[0055] (c) raising the temperature of the reactants in the flask to 65°C, insulated for 1 hour, then raised to 75°C, incubated for 2 hours, and finally raised to 80°C for 3 hours;

[0056] (d) measure the acid value of the reaction solution, its acid value is 6.38mgKOH / g, stop the reaction, cool to room temperature and discharge to obtain alicyclic epoxy acrylate prepolymer 1-2, its structural formula is:

[0057]

Embodiment 3

[0059] (a) 0.73g 4-methoxyphenol, 1.47g tetraethylammonium bromide are dissolved in 47.54g acrylic acid;

[0060] (b) Add 100.0 g of alicyclic epoxy resin to a four-necked round-bottomed flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, protect it with nitrogen, stir and heat up to 50 ° C, and the mixture solution in (a) Transfer to constant pressure dropping funnel, drop in the flask in 60min; The structural formula of above-mentioned cycloaliphatic epoxy resin is:

[0061]

[0062] (c) raising the temperature of the reactants in the flask to 65°C, insulated for 1 hour, then raised to 75°C, incubated for 2 hours, and finally raised to 80°C for 3 hours;

[0063] (d) measure the acid value of the reaction solution, its acid value is 6.60mgKOH / g, stop the reaction, cool to room temperature and discharge to obtain alicyclic epoxy acrylate prepolymer 1-3, its structural formula is:

[0064]

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Abstract

The present invention relates to an alicyclic epoxy acrylate prepolymer and a synthesis method thereof. The alicyclic epoxy acrylate prepolymer has a structure represented by a general formula selected from A, B, C, D, E, F and G shown in attached figures. The synthesis method comprises: adding a raw material of an alicyclic epoxy resin to a reaction vessel; preheating to a temperature of 50-60 DEG C; adding acrylic acid or methacrylic acid to the reaction vessel in a dropwise manner, wherein the acrylic acid or the methacrylic acid is dissolved with a catalyst and a polymerization inhibitor; heating the mixed solution in the reaction vessel to the temperature of 65 DEG C, and holding the temperature for 1 hour; heating the mixed solution to the temperature of 75 DEG C, and holding the temperature for 2 hours; finally heating the mixed solution to the temperature of 80-90 DEG C, and holding the temperature for 2-8 hours; stopping the reaction when the acid value of the mixed solution is less than 8 mg KOH / g; cooling to the room temperature, and discharging the material to obtain the alicyclic epoxy acrylate prepolymer. According to the present invention, the alicyclic epoxy acrylate prepolymer provided by the present invention is subjected to ultraviolet curing to form a film, the paint film has excellent weathering resistance, excellent heat resistance, excellent temperature fluctuation resistance, excellent yellowing resistance and excellent adhesion, such that the disadvantages of poor weathering resistance, poor yellowing resistance and the like of bisphenol A type epoxy acrylate are overcome.

Description

technical field [0001] The present invention relates to a kind of ultraviolet curing resin and its preparation method, especially alicyclic epoxy acrylate and its preparation method technical background [0002] Epoxy acrylate is a class of widely used resins, which can be used as corrosion-resistant and high-strength FRP products, anti-corrosion engineering, thermal curing or ultraviolet (UV) curing coatings, UV curing inks, adhesives, heavy-duty industrial applications Ping and so on. It can be cured by thermal curing and radiation curing. With the development of environmental protection and low-carbon economy, there are more and more applications of UV-curable epoxy acrylate resins. [0003] UV-curable coatings that use epoxy acrylate resin as oligomers have high gloss, high hardness, good toughness, excellent water resistance, chemical corrosion resistance and heat resistance after curing, so they occupy an important position in the coating field. Important position. ...

Claims

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Application Information

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IPC IPC(8): C07C69/33C07C69/28C07C67/26C09D4/02
Inventor 黎朝祈元春张彦庆董擎之
Owner EAST CHINA UNIV OF SCI & TECH
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