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Polyethylene glycol-modified epoxy acrylate coating and preparation method thereof

An epoxy acrylate, polyethylene glycol modification technology, applied in the field of wood and metal materials, can solve the problems of resin viscosity increase, side reaction, performance deterioration, etc., to reduce viscosity, good stability, excellent flexibility Effect

Inactive Publication Date: 2012-12-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because reactive diluents have a special pungent smell and high toxicity, they pollute the local environment and cause harm to operators; moreover, reactive diluents are expensive, which increases product costs
In addition, after the epoxy acrylate coating is cured, the coating film has high brittleness, poor flexibility, and easy cracking, which affects the decorative effect.
[0005] Due to the excess of epoxy resin currently used in the synthesis of epoxy acrylate, there are more epoxy groups in the product, so the storage stability of the resin is poor; the traditional preparation process often uses a higher reaction temperature, which is likely to cause side effects. reaction; and catalyst selectivity does not engage, resulting in increased resin viscosity and poor performance
[0006] To sum up, the existing formulations for the production of epoxy acrylate coatings and their shortcomings in the preparation process lead to shorter resin storage periods, poor overall performance, and the need to incorporate more reactive monomers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of polyethylene glycol modified epoxy acrylate resin

[0031] Add 39.2g of epoxy resin E-51 and 0.12g of triphenylphosphine into the reaction vessel, heat up to 110°C with stirring, add 4g of polyethylene glycol 400, control the temperature at 110°C, and reflux for 3 hours, the first The first step of the reaction is over; the temperature is lowered to 95°C, and a homogeneous mixture of 0.26g triphenylphosphine, 0.026g p-hydroxyanisole and 13.22g acrylic acid is added dropwise to the reaction vessel, and the addition is controlled within 35min, and the reaction is carried out at constant temperature for 4 hours. The acid value of the system is measured to be lower than 5 mgKOH / g, and the material is cooled and discharged to obtain polyethylene glycol modified epoxy acrylate resin.

[0032] (2) Preparation of UV-cured polyethylene glycol modified epoxy acrylate coating

[0033] Take 43.5g of base resin obtained in step (1), add 1g Irgacure1173 (2-hydroxy...

Embodiment 2

[0035] (1) Preparation of polyethylene glycol modified epoxy acrylate resin

[0036] Add 45.5g of epoxy resin E-44 and 0.14g of tetrabutylammonium bromide into the reaction vessel, raise the temperature to 105°C under stirring, add 4.8g of polyethylene glycol 600, control the temperature and reflux for 3.5 hours, the first step The reaction is over; the temperature is lowered to 90°C, and a homogeneous mixture of 0.3g tetrabutylammonium bromide, 0.035g p-hydroxyanisole and 13.51g acrylic acid is added dropwise to the reaction vessel, and the addition is controlled within 50 minutes, and the reaction is carried out at constant temperature for 4.5 hours. The acid value of the system is measured to be lower than 5 mgKOH / g, and the material is cooled and discharged to obtain polyethylene glycol modified epoxy acrylate resin.

[0037] (2) Preparation of UV-cured polyethylene glycol modified epoxy acrylate coating

[0038] Take 42.5g of base material resin obtained in step (1), add...

Embodiment 3

[0040] (1) Preparation of polyethylene glycol modified epoxy acrylate resin

[0041] Add 39.2g of epoxy resin E-51 and 0.14g of tetrabutylammonium bromide into the reaction vessel, raise the temperature to 115°C under stirring, add 6g of polyethylene glycol 600, control the temperature and reflux for 4 hours, the first step of reaction End; lower the temperature to 100°C, add dropwise a homogeneous mixture of 0.27g tetrabutylammonium bromide, 0.027g p-hydroxyanisole and 13.22g acrylic acid to the reaction vessel, control the addition within 40min, and keep the reaction at constant temperature for 3.5 hours. The acid value of the system is measured to be lower than 5 mgKOH / g, and the material is cooled and discharged to obtain polyethylene glycol modified epoxy acrylate resin.

[0042] (2) Preparation of UV-cured polyethylene glycol modified epoxy acrylate coating

[0043] Take 43g of base resin obtained in step (1), add 0.5g Irgacure1173, 1g Irgacure184, 2g TPGDA, 1.5gDPGDA, ...

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PUM

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Abstract

The invention discloses a polyethylene glycol-modified epoxy acrylate coating and a preparation method thereof. The method comprises the following steps: firstly adding epoxy resin and catalyst to a reaction vessel, rising the temperature to be 105-115 DEG C under the stirring condition, adding modifier, and reacting for 2-4 hours; preparing modified resin; reducing the temperature to be 90-100 DEG C for the modified resin, adding the even mixture of catalyst, polymerization inhibitor and acrylic acid within 30-60min, and reacting for 3-5 hours at constant temperature; obtaining the polyethylene glycol-modified epoxy acrylate resin; and adding an activated monomer, photoinitiator, flatting agent and antifoaming agent to the polyethylene glycol-modified epoxy acrylate resin, and evenly stirring and mixing to obtain the polyethylene glycol-modified epoxy acrylate coating. The photocureable coating prepared by the method has the advantages of far low viscosity, excellent adhesion and storage stability; and the solidified film has the performances of excellent flexibility, luster, pencil hardness, water tolerance, acid resistance, alkali resistance and the like.

Description

technical field [0001] The invention relates to an epoxy acrylate paint, in particular to a polyethylene glycol modified epoxy acrylate paint and a preparation method thereof. The paint is suitable for the fields of woodware, metal materials and the like. Background technique [0002] In recent years, the world's environmental protection regulations have become more and more perfect, and the requirements have become increasingly stringent. Traditional solvent-based coatings have been greatly impacted by the emission of volatile organic compounds (VOC), while UV-curable coatings (UVCC), water-based coatings, and high-solid coatings Environmentally friendly green coatings represented by sub-coatings and powder coatings have become a focus of attention and research. Compared with other types of coatings, UVCC has fast curing speed, low curing temperature, environmental protection and energy saving, and excellent coating performance. It can be used for coating heat-sensitive sub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/10C09D7/12C08G59/14C08G59/17
Inventor 王锋胡剑青涂伟萍
Owner SOUTH CHINA UNIV OF TECH