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Preparation method of cationic ultraviolet light curing resin with synergistic water solubility

A technology of curing resin and cation, which is applied in the field of preparation of cationic UV-curable resin, which can solve the problems of low hardness, influence of cured film performance, and difficulty in compounding and use, and achieve the effect of good wear resistance and good comprehensive physical and chemical properties

Active Publication Date: 2021-10-01
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, many researchers are conducting research on light-curable water-based resins. Most of the early studies made oligomers soluble in water by adding emulsifiers. Such resins need to add emulsifiers to achieve water-based resins. However, The addition of emulsifiers will have a greater impact on the properties of the cured film
Therefore, water-soluble photocurable resins are currently being developed, and hydrophilic functional groups are introduced into the resin structure to achieve this. Most of this type of resin has a linear structure, only one main chain, and its performance is relatively simple. For example, epoxy acrylate has high hardness but is flexible. Poor resistance; polyurethane acrylate has good flexibility and wear resistance, but has disadvantages such as low hardness. In order to obtain a cured film with good comprehensive performance, a variety of resins must be used in combination, and different water-based resins have different water-based ions. Inconsistency makes it difficult to compound and use, and it is difficult to control the curing performance and physical and chemical properties
[0005] In addition, this type of water-based UV-curable resin generally only has acrylate double bonds at both ends, and most of them are difunctional. , wear resistance, alcohol resistance, etc. are not high. In addition, the number of water-based functional groups in its molecular structure is limited, resulting in limited water solubility. It is difficult to dilute with a large amount of water in applications such as spraying
The defects of these water-based resins make it difficult to meet the increasing demands of the industry on the performance of UV-curable coatings, and it also makes it difficult for water-based UV-curable resins to be used on a large scale in the industry.

Method used

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  • Preparation method of cationic ultraviolet light curing resin with synergistic water solubility

Examples

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Embodiment 1

[0039] A preparation method of a cationic ultraviolet light curing resin with synergistic water solubility, comprising the steps of:

[0040] The first step, in 500mL there-necked flask, add 30g solvent propylene glycol methyl ether acetate, 40g methyl methacrylate, 40g methyl acrylate, 30g glycidyl methacrylate, 60g hydroxyethyl methacrylate, 30g styrene, Stir evenly, add catalyst azobisisobutyronitrile accounting for 0.8% of the total mass of the monomer, heat to 68°C while stirring, and react for 3 hours to obtain a polyacrylate segment with hydroxyl and epoxy groups in the side chain ①, In the polyacrylate segment, the mass percent content of hydroxyethyl methacrylate (source of hydroxyl group) is 30%, and the mass percent content of glycidyl methacrylate (source of epoxy group) is 15%.

[0041] In the second step, add 1mol of toluene diisocyanate (TDI) to a 1000mL three-necked flask, heat to 63°C, and add 0.5% of dibutyltin dilaurate to 0.5mol of polyethylene glycol (mole...

Embodiment 2

[0051] A preparation method of a cationic ultraviolet light curing resin with synergistic water solubility, comprising the steps of:

[0052] In the first step, add 30g solvent ethylene glycol butyl ether acetate, 20g butyl methacrylate, 40g methyl methacrylate, 40g hydroxyethyl acrylate, 30g hydroxyethyl methacrylate, 50g formazan in a 500mL three-necked flask. Glycidyl acrylate, 10g styrene, 10g acrylonitrile, stir evenly, add 1.1% catalyst benzoyl peroxide tert-butyl peroxide, heat to 68°C while stirring, react for 3h, and obtain side The polyacrylate segment with hydroxyl and epoxy groups in the chain ①, in the polyacrylate segment, the mass percentage content of hydroxy acrylate (source of hydroxyl group) is 35%, glycidyl acrylate (source of epoxy group) The mass percentage composition is 25%.

[0053] Second step, in 1000mL there-necked flask, add the hexamethylene diisocyanate (HDI) of 1mol, be heated to 70 ℃, dibutyltin dilaurate joins the polyethylene glycol of 0.5mo...

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Abstract

The invention provides a method for preparing a cationic UV-curable resin with synergistic water solubility, which comprises the following steps: synthesizing a polyacrylate segment with a side chain containing a hydroxyl group and an epoxy group as the main chain; synthesizing one end with The urethane acrylate segment of the NCO group is used as a side chain; the above two segments are reacted to obtain a urethane acrylate modified polyacrylate resin containing multiple acrylate double bonds and epoxy groups in the side chain ; Stir the obtained resin evenly, heat up, dropwise add amine, cool after reaction, add acid, then add water, and stir evenly. Adopt the technical scheme of the present invention, the resin that obtains is comb type, has lower viscosity and water-solubility; Wherein the urethane acrylate side chain of grafting has synergistic effect to the water-solubility of whole resin; The degree of cross-linking of the resin is greatly improved, effectively improving the performance of the cured film.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of cationic ultraviolet light curing resin with synergistic water solubility. Background technique [0002] Ultraviolet (UV) curing technology is an environmentally friendly curing technology. After the liquid coating is irradiated by ultraviolet light, a photochemical reaction occurs, which causes polymerization and crosslinking, and the liquid coating becomes a solid film in a short time. Because of its fast curing speed, less environmental pollution, automatic production, suitable for use on heat-sensitive substrates, etc., it is expected to replace traditional solvent-based coatings, adhesives, inks, etc. in industry, and has good applications in most fields. prospect. According to the photocuring mechanism, there are two types of free radical curing and cationic curing. The free radical photocuring system has the advantages of fas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/02
CPCC08G81/024
Inventor 刘红波张武英张霞肖望东林峰
Owner SHENZHEN POLYTECHNIC
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