Epoxy acrylate for UV (ultraviolet) curable coating and preparation method of epoxy acrylate

A technology for epoxy acrylate and curing coatings, applied in the field of coatings, can solve the problems of reduced polymerization shrinkage, lower viscosity of epoxy acrylate resin, flammability, etc., to achieve outstanding heat resistance and water resistance, and increase space volume , The effect of eliminating the problem of phase separation

Inactive Publication Date: 2012-07-11
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth pointing out that there are two outstanding problems in the use of these traditional reactive diluents: one is that they are highly volatile, flammable, and harmful to the human body; the other is that they reduce the viscosity of epoxy acrylate resins while , also reduces the heat resistance and toughness of epoxy acrylate resin, which cannot meet the requirements of high-performance UV curable resin in advanced fields
The polymerization shrinkage of this resin is significantly reduced, but the viscosity is still high, and it needs to be used in conjunction with a reactive diluent to obtain a suitable coating viscosity (see literature Chia-Yin Chen, Chih-Kai Huang, Shih-Pin Lin, Jin-Lin Han, Kuo-Huang Hsieh, Chun-Pin Lin. Low-shrinkage visible-light-curable urethane-modified epoxy acrylate / SiO 2 Composites as dental restorative materials, Composites Science and Technology, 2008, 68: 2811-2817.)

Method used

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  • Epoxy acrylate for UV (ultraviolet) curable coating and preparation method of epoxy acrylate
  • Epoxy acrylate for UV (ultraviolet) curable coating and preparation method of epoxy acrylate
  • Epoxy acrylate for UV (ultraviolet) curable coating and preparation method of epoxy acrylate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Preparation of hyperbranched polysiloxane

[0031] Refer to the technical scheme disclosed in the Chinese invention patent (publication number CN101570600) to prepare hyperbranched polysiloxane. The specific method is: mix γ-methacryloxypropyltrimethoxysilane with deionized water in a molar ratio of 1: 1.2 Pour into the reaction bottle, adjust pH=2, N 2 protection, heated to 50°C for 5 hours, and dried in a vacuum oven for 3 hours to obtain hyperbranched polysiloxane, whose structural formula is:

[0032]

[0033] In the formula, R is .

[0034] The hyperbranched polysiloxane that present embodiment provides, its IR, 1 H NMR and 29 Si NMR spectra are shown in the attached figure 1 , 2 and 5. The molecular weight is 2800 g / mol as determined by the multi-angle dynamic laser scattering method.

[0035] 2) Preparation of bisphenol A epoxy acrylate resin

[0036]Add 100g of bisphenol A epoxy resin (grade E51, epoxy value 0.48-0.54) into a 250mL three-necked f...

Embodiment 2

[0046] 1) Preparation of hyperbranched polysiloxane

[0047] Pour vinyltrimethoxysilane and deionized water into the reaction bottle at a molar ratio of 1:1.1, adjust pH=3, N 2 protection, heated to 60°C for 4 hours, and dried in a vacuum oven for 3 hours to obtain hyperbranched polysiloxane, whose structural formula is:

[0048]

[0049] In the formula, R is .

[0050] 2) Preparation of bisphenol A epoxy acrylate resin

[0051] Add 100g of bisphenol A epoxy resin (grade E44, epoxy value: 0.41-0.47) into a 250mL three-necked flask, stir and heat up to 95°C, then add 33g of acrylic acid and 0.02g of p-hydroxyanisole dropwise and 0.06g of triethylamine, the temperature was raised to 115° C. after the dropwise addition, and the reaction was carried out for 180 minutes to obtain bisphenol A epoxy acrylate resin.

[0052] 3) An epoxy acrylate for UV curable coatings

[0053] After 100 g of the bisphenol A epoxy acrylate resin prepared in step 2) of this example was cooled ...

Embodiment 3

[0055] 1) Preparation of hyperbranched polysiloxane

[0056] Pour vinyltriethoxysilane and deionized water into the reaction flask at a molar ratio of 1:1.5, adjust pH=2, N 2 protected, heated to 70°C for 3 hours, and dried in a vacuum oven for 3 hours to obtain hyperbranched polysiloxane. Its structural formula is referring to embodiment 1.

[0057] 2) Preparation of bisphenol A epoxy acrylate resin

[0058] Add 100g of bisphenol A type epoxy resin (grade E51) into a 250mL three-neck flask, stir and raise the temperature to 100°C, then add 16g of acrylic acid, 20g of methacrylic acid, 0.05g of hydroquinone and 0.1g of N , the mixed solution composed of N-dimethylbenzylamine was heated up to 110° C. after the dropwise addition, and reacted for 150 minutes to obtain bisphenol A epoxy acrylate resin.

[0059] 3) An epoxy acrylate for UV curable coatings

[0060] After 100 g of the bisphenol A epoxy acrylate resin prepared in step 2) of this example was cooled to 40°C, 20 g o...

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Abstract

The invention discloses an epoxy acrylate for a UV (ultraviolet) curable coating and a preparation method of the epoxy acrylate, and the epoxy acrylate is characterized in that: a side chain of the epoxy acrylate is bonded with hyperbranched polysiloxane with methacryloxy and / or vinyl by chemical bonds. The preparation method comprises the following steps of: mixing silicane with deionized water,reacting the mixture under N2 protection to obtain hyperbranched polysiloxane; dropwise adding a mixture solution composed of acrylic acid, polymerization inhibitor and catalyst into in epoxy resin, so as to obtain epoxy acrylate; dropwise adding a mixture composed of the hyperbranched polysiloxane and catalyst into the obtained epoxy acrylate, stirring and reacting the mixture, purifying and drying the reaction product to obtain the epoxy acrylate for UV curable coating. Compared with the existing epoxy acrylate coating, the epoxy acrylate coating prepared by the method has the advantages oflow viscosity, high heat resistance, good flexibility and good water resistance. The preparation method also has advantages of wide applicability and simple operation technology.

Description

technical field [0001] The invention relates to the field of coatings, in particular to an epoxy acrylate for UV curing coatings and a preparation method thereof. Background technique [0002] With the increasing emphasis on environmental protection and the development of green chemical technology in the world, UV curing coatings have attracted widespread attention. Epoxy acrylate resin is currently the most consumed type of light-curing coating in the domestic UV curing industry. It has the advantages of fast photocuring reaction rate, high hardness and tensile strength of the cured product, high gloss of the film layer, and excellent chemical corrosion resistance. However, the viscosity of epoxy acrylate resin is very high at room temperature (usually over 100Pa·s), which is very unfavorable for spreading and thus affects the curing effect. Therefore, it is necessary to add a large amount of reactive diluent to adjust the viscosity to meet the process requirements of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G77/20C08G59/17C09D187/00C09D163/10
Inventor 顾嫒娟刘萍梁国正袁莉
Owner SUZHOU UNIV
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