Ultraviolet-curing modified epoxy acrylic resin and preparation method thereof

An epoxy acrylic and epoxy resin technology, applied in epoxy resin coatings, coatings and other directions, can solve the problems of poor weather resistance, poor flexibility, high viscosity, etc., achieve excellent toughness and weather resistance, improve environmental conditions, low The effect of viscosity

Inactive Publication Date: 2015-04-29
HUNAN SUIFENG NEW MATERIAL & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among them, epoxy acrylic resin has become the most researched and widely used one in the UV curing industry due to its high hardness, good gloss, strong toughness, excellent heat resistance, and low price, but it has high viscosity, high brittleness, and poor flexibility. And the poor weather resistance of the film also limits its application range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Put 90 g of epoxy resin E-44 and 10 g of 1,2-cyclohexanediol diglycidyl ether (CD-1180) into the reactor, stir and heat up to 80 ° C, then add 0.654 g of triethylamine, and then use The constant pressure dropping funnel was filled with 30.848 g of acrylic acid and 0.654 g of 4-methoxyphenol for dropwise addition, and the dropwise addition was completed within 1.0 h; after the dropwise addition, the timing was started, and the temperature was raised by 5°C every hour in the middle stage, and the reaction was carried out for 1 h Afterwards, start to measure the acid value, and stop the reaction when the acid value of the reactant is 2.72 mg KOH / g, and react for 5 h in total, and the modified epoxy acrylic resin GEA-1 is obtained in discharging.

Embodiment 2

[0036] Put 85 g of epoxy resin E-44 and 15 g of 1,2-cyclohexanediol diglycidyl ether (CD-1180) into the reactor, stir and heat up to 80 ° C, then add 0.656 g of triethylamine, and then use The constant pressure dropping funnel was filled with 31.225 g of acrylic acid and 0.656 g of hydroquinone for dropwise addition, and the dropwise addition was completed within 1.0 h; after the dropwise addition, the timing was started, and the temperature was raised by 5°C every hour in the mid-term, and the reaction started after 1 h. The acid value was measured, and the reaction was stopped when the acid value of the reactant was 2.58 mg KOH / g. The reaction was carried out for 5 h, and the modified epoxy acrylic resin GEA-2 was obtained by discharging.

Embodiment 3

[0038] Put 80 g of epoxy resin E-44 and 20 g of 1,2-cyclohexanediol diglycidyl ether (CD-1180) into the reactor, stir and heat up to 80°C, then add 0.658 g of triethylamine, and then use The constant pressure dropping funnel was filled with 31.600 g of acrylic acid and 0.658 g of 2,6-di-tert-butyl for dropwise addition, and the dropwise addition was completed within 1.0 h; after the dropwise addition, the timing was started, and the temperature was raised by 5°C every hour in the mid-term, and the reaction After 1 h, the acid value was measured. When the acid value of the reactant was measured to be 2.65 mg KOH / g, the reaction was stopped. The reaction lasted for 5 h, and the modified epoxy acrylic resin GEA-3 was obtained as a result of discharge.

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PUM

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Abstract

The invention relates to ultraviolet-curing modified epoxy acrylic resin and a preparation method thereof. A synthesis method comprises the steps that a raw material, namely epoxy resin and 1,2-cyclohexanediol diglycidyl ether (CD-1180) at different ratios are put into a reactor; stirring is performed; heating is performed to 80-90 DEG C; a measured catalyst is added; a constant-pressure drop funnel contains acrylic acid and a polymerization inhibitor to dropwise add within 0.5-1.0h; timing is started; heating is performed gradually; a reaction is performed for 1h; an acid value is measured; the reaction is stopped when the acid value of a reactant is less than or equal to 3mgKOH / g after about 4-6h; discharge is performed; and the modified epoxy acrylic resin is obtained. The modified epoxy acrylic resin obtained by the method has the characteristics of low viscosity and convenience in use; compared with the current commercially available product, the viscosity is greatly improved; the storage stability is good; and the weather resistance and the flexibility of a paint film are superior to the traditional commercially available epoxy acrylic resin after ultraviolet-curing film forming.

Description

technical field [0001] The invention relates to a UV-curable resin and a preparation method thereof, in particular to a UV-curable modified epoxy acrylic resin and a preparation method thereof. Background technique [0002] my country's research on the theory and application of UV-curable coatings began in the early 1970s, but it developed slowly due to the limitations of raw materials and curing equipment. After entering the 1990s, the demand for UV-curable coatings from all walks of life and the improvement of various technologies and levels have greatly promoted the development of UV-curable coatings in China. At present, my country's UV curing industry has become the third largest producer of UV curing products in the world after the United States and Japan. UV curing coatings have been widely used in various industries and fields, and have been continuously developed and improved. [0003] UV-curable coatings are composed of photosensitive resins (prepolymers) with ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/17C09D163/10
Inventor 邓剑如张习龙
Owner HUNAN SUIFENG NEW MATERIAL & TECH DEV
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