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High-crosslinking light-cured water-dispersible epoxy acrylic resin and preparation method thereof

A technology of epoxy acrylic and epoxy resin, applied in the direction of coating, etc., can solve the problems of coating film hardness, water resistance, poor chemical resistance, adhesion, impact resistance and flexibility, poor recoatability, and limited development and application and other issues, to achieve high water resistance and chemical resistance, fast curing, performance enhancement

Pending Publication Date: 2021-04-27
SHANGHAI SHOWA HIGHPOLYMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional non-aqueous photocurable resins, the main resin contains unsaturated bonds, and active monomers are used as curing agents and diluents. Due to the selection and dosage of active diluents, it is often easy to form hard and brittle coating films. Although excellent Excellent hardness and chemical resistance, but poor adhesion, impact resistance, flexibility and recoatability
The traditional water-based photocurable resin mainly uses the unsaturated bonds in the resin to polymerize through the photoinitiator. Since the unsaturated bonds in the resin are relatively small, the coating film is soft and brittle, and the hardness, water resistance, and chemical resistance of the coating film are relatively low. bad character
It is precisely because of these characteristics that it limits its greater development and application in the field of coatings.

Method used

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  • High-crosslinking light-cured water-dispersible epoxy acrylic resin and preparation method thereof
  • High-crosslinking light-cured water-dispersible epoxy acrylic resin and preparation method thereof
  • High-crosslinking light-cured water-dispersible epoxy acrylic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment provides a synthetic method for highly cross-linked light-cured water-dispersed epoxy acrylic resin, said method comprising the steps of:

[0062] (1) Add 42.1g (a) of bisphenol A type epoxy resin with a degree of polymerization of 2 to 6 and 1.1g of triphenylphosphine into the reaction kettle equipped with a stirring device. Add 6.3 g of acrylic acid (b) dropwise. After the dropwise addition, keep warm and react until the acid value is less than 1. Add 0.2 g of methyl hydroquinone, stir for 30 minutes, and discharge to obtain prepolymer I.

[0063] (2) Add the following monomers to the beaker: methyl methacrylate 74.8g (c), isooctyl acrylate 58.2g (d), hydroxyethyl methacrylate 5.8g (e), acrylic acid 35.8g (f) , and 1.5 g of initiator azobisisobutyronitrile, stirred for 30 min to prepare a monomer mixture. Add 24 g of ethylene glycol dibutyl ether and 18 g of water into a reactor equipped with a stirring device and fed with nitrogen. Raise the reactio...

Embodiment 2-6

[0066] The same method as in Example 1 was used to prepare a highly cross-linked photocurable water-dispersed epoxy acrylic resin, except that in Examples 2-6, each monomer was used in the amount shown in Table 1, respectively.

[0067] Table 1

[0068]

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Abstract

The invention discloses high-crosslinking light-cured water-dispersible epoxy acrylic resin and a preparation method thereof. The high-crosslinking light-cured water-dispersible epoxy acrylic resin has a chemical structure as shown in a general formula (I). According to the invention, bisphenol A epoxy and a high-functionality active crosslinking monomer are introduced, so that a strong cohesive soft segment and a high-crosslinking hard segment exist in the resin structure at the same time, and the high-crosslinking light-cured water-dispersible epoxy acrylic resin disclosed by the invention not only maintains the rapid curing, high hardness, high water resistance and chemical resistance of the traditional light-cured resin, but also has greatly enhanced adhesive force, impact resistance, flexibility, recoatability and other properties.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a highly cross-linked photocurable water-dispersed epoxy acrylic resin and a preparation method thereof. Background technique [0002] As the society's awareness of environmental protection gradually strengthens, people's requirements for environmental protection of coatings are also getting higher and higher. Photocurable resin coatings are more and more widely used because of their low VOC emissions. Traditional light-curable resins are divided into: solvent-based light-curable resins and water-based light-curable resins, which are cured by UV lamps under dry conditions, with fast curing speed, low energy consumption, high hardness, good chemical resistance, and large performance adjustment space Etc. It is widely used in protective coating fields such as metal protection, daily necessities, and woodworking. [0003] Traditional non-aqueous photocurable resins, the main resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/10C08F220/14C08F220/18C08F220/20C08F220/06C08F222/20C09D151/08
CPCC08F283/105C09D151/08C08F220/14C08F220/1808C08F220/20C08F220/06C08F222/1006
Inventor 赵后来李晖
Owner SHANGHAI SHOWA HIGHPOLYMER CO LTD