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Preparation method of epoxy acrylate ultraviolet cured coating

A technology of epoxy acrylate and curing coatings, which is applied in the field of coatings, and can solve the problems of affecting shelf life, poor bonding of matrix resin, delamination, etc., to improve dispersion, improve impact resistance and flexibility, and improve anti-aging performance Effect

Inactive Publication Date: 2015-04-29
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these nano-fillers are not organically modified, and have poor bonding with the matrix resin, so they are prone to delamination and affect the shelf life

Method used

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  • Preparation method of epoxy acrylate ultraviolet cured coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) 3-glycidyl etheroxypropyl trimethoxysilane modified titanium dioxide / attapulgite composite powder of 63g bisphenol A type epoxy resin E44 and 3.15g (in the composite powder, the mass content of titanium dioxide is 30%) was added in 44.1g ethylene glycol butyl ether, stirred and reacted for 30min, then slowly added dropwise 6g acrylic acid, and added 0.315g triethylamine and 0.063g p-hydroxyanisole, and the temperature was raised to carry out the epoxy ring-opening reaction, keeping The reaction temperature is 130°C until the acid value of the system is less than 5mgKOH / g, and cooled to room temperature (25°C) to prepare titanium dioxide / attapulgite modified epoxy acrylate;

[0021] (2) Get titanium dioxide / attapulgite modified epoxy acrylate 80g, photoinitiator 1g (0.5g D-1173 and 0.5g I-184), acrylate leveling agent 0.04g, step (1) gained, 0.02 g of silicone defoamer was mixed, and mechanically dispersed for 3 hours, and mixed uniformly to obtain a UV-curable coati...

Embodiment 2

[0023] (1) 3-glycidyl ether oxypropylmethyldiethoxysilane modified titanium dioxide / attapulgite composite powder of 50g bisphenol A type epoxy resin E54 and 5g (in the composite powder, the amount of titanium dioxide mass content is 30%) was added in 50g butyl acrylate, stirred and reacted for 60min, then slowly added dropwise 9g acrylic acid, and added 0.75g triethylamine and 0.1g hydroquinone, the temperature was raised to carry out the epoxy ring-opening reaction, and the reaction was maintained The temperature is 110°C until the acid value of the system is less than 5mgKOH / g, and cooled to room temperature (25°C) to prepare titanium dioxide / attapulgite modified epoxy acrylate;

[0024] (2) Get titanium dioxide / attapulgite modified epoxy acrylate 95g, photoinitiator 7g (2.33g D-1173 and 4.67g I-184) of step (1) gained, organosilicon type leveling agent 0.4g, 0.12 g of silicone defoamer was mixed, and mechanically dispersed for 6 hours, and mixed uniformly to obtain a UV-cur...

Embodiment 3

[0026] (1) 61.7g of bisphenol A type epoxy resin E51 and 4.94g of 3-glycidyl ether oxypropylmethyldiethoxysilane modified titanium dioxide / attapulgite composite powder (in the composite powder, The mass content of titanium dioxide is 30%) joins in 55.5g butyl acrylate, stirs and reacts 50min, then slowly drips 10g acrylic acid, and adds 0.74g tetramethylammonium chloride and 0.074g p-hydroxyanisole, heats up and carries out ring Oxygen ring-opening reaction, keep the reaction temperature at 120°C until the acid value of the system is less than 5mgKOH / g, cool to room temperature (25°C), and prepare titanium dioxide / attapulgite modified epoxy acrylate;

[0027] (2) Take 90g of titanium dioxide / attapulgite modified epoxy acrylate obtained in step (1), 6g of photoinitiator (2.67gD-1173 and 3.33g of PBZ), 0.22g of acrylate leveling agent, silicone 0.07 g of defoaming agent was mixed, and mechanically dispersed for 5 hours, and mixed uniformly to obtain a UV-curable coating.

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Abstract

The invention belongs to the field of coatings, and in particular relates to a modified epoxy acrylate ultraviolet cured coating and a preparation method thereof. The preparation method comprises the following steps: adding epoxy resin and modified titanium dioxide / attapulgite nano composite powder containing an epoxy group coupling agent into an active diluent, then adding acrylic acid, a catalyst and a polymerization inhibitor, and heating to perform epoxy ring-opening reaction to obtain titanium dioxide / attapulgite modified epoxy acrylate; and adding a photoinitiator, a leveling agent and a defoaming agent into the modified epoxy acrylate, and mixing uniformly to obtain the ultraviolet cured coating. According to the preparation method, the dispersity of the titanium dioxide / attapulgite in epoxy acrylic resin is improved, and the mechanical properties including ageing resistance, impact resistance, flexibility and the like of an epoxy acrylate coating layer are greatly improved.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a modified epoxy acrylate ultraviolet light curing coating and a preparation method thereof. Background technique [0002] Epoxy acrylate (EA) is the most consumed type of oligomer in UV-curable coatings, and it has the characteristics of wide source, high hardness and low price. However, due to its high curing cross-linking density and three-dimensional network structure, there is little sliding of molecular chains, and the light aging resistance of EA is poor, resulting in problems such as high brittleness and easy cracking of the coating. [0003] The traditional anti-aging coatings are to add anti-aging agents, such as hindered phenolic antioxidants, phosphite antioxidants or sulfur-based antioxidants, to the coatings. However, this kind of anti-aging agents has different degrees of toxicity, is volatile, and causes certain pollution to the environment, and its safety rem...

Claims

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Application Information

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IPC IPC(8): C09D163/10C09D7/12
CPCC08K3/22C08K3/346C08K9/06C08K2003/2241C08K2201/011C09D7/61C09D7/62C09D163/10
Inventor 刘文杰左士祥姚超吴凤芹徐姣罗士平李霞章魏科年
Owner CHANGZHOU UNIV
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