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Cationic visible light curing composition

A cationic, cationic light-initiated technology, applied in the field of photopolymerization, can solve the problems of poor environmental safety, high curing cost, and limited application, and achieve the effects of low cost, high photocuring conversion rate, and fast initiation speed

Active Publication Date: 2017-05-24
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ultraviolet light source has high requirements on equipment, large radiation, poor environmental safety, and high curing cost, which greatly limits its application

Method used

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  • Cationic visible light curing composition
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  • Cationic visible light curing composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The preparation of embodiment 1 BODIPY dye-1

[0075] Preparation of BODIPY dye-1 (referred to as BPY-1) shown in formula (IV): take a 500mL single-necked bottle, dissolve 2mmol pyrrole and 1mmol p-bromobenzaldehyde in 200mL methylene chloride, and replace the Air, and use the method of argon bubbling to drive out the air in the solution, then drop a drop of trifluoroacetic acid as a catalyst, keep stirring under the protection of argon, and the reaction temperature is room temperature (25°C). After 2 hours, the reaction was terminated, and the reaction solution was washed twice with 100 mL of 0.1 mol / L NaOH solution, then the organic layer was dried with anhydrous sodium sulfate, and the solvent dichloromethane was all evaporated under argon protection conditions, and then Add 20 mL of toluene to dissolve the evaporated residue, add 1 mmol of 2,3-dichloro-5,6-dicyanobenzoquinone as an oxidant to the reaction mixture, and add 8 mmol of boron trifluoride ether solution a...

Embodiment 2

[0081] The preparation of embodiment 2 BODIPY dye-2

[0082] Prepare BODIPY dye-2 (referred to as BPY-2) shown in formula (Ⅴ): take a 500mL single-necked bottle, dissolve 2mmol pyrrole and 1mmol p-hexyloxybenzaldehyde in 200mL methylene chloride, and replace the flask with argon The air in the solution was driven out by argon bubbling, then a drop of trifluoroacetic acid was added as a catalyst, and the reaction temperature was room temperature (25° C.) while stirring continuously under the protection of argon. After 2 hours, the reaction was terminated, and the reaction solution was washed twice with 100 mL of 0.1 mol / L NaOH solution, then the organic layer was dried with anhydrous sodium sulfate, and the solvent dichloromethane was all evaporated under argon protection conditions, and then Add 20 mL of toluene to dissolve the evaporated residue, add 1 mmol of 2,3-dichloro-5,6-dicyanobenzoquinone as an oxidant to the reaction mixture, and add 8 mmol of boron trifluoride ether...

Embodiment 3

[0088] Example 3 Preparation of Cationic Visible Light Curable Composition (1)

[0089] Take by weighing 0.2000g (0.469mmol) diphenyliodonium hexafluorophosphate (IPF), add 0.1000g (0.289mmol) BODIPY dyestuff-1 (BPY-1) that embodiment 1 makes and place in brown bottle, then Add 2mL of epichlorohydrin, stir fully to completely dissolve the initiator, then add 10g of bisphenol A epoxy prepolymer E51, and stir evenly to obtain the cationic visible light curable composition, which is stored away from light.

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Abstract

The invention discloses a cationic visible light curing composition. The cationic visible light curing composition is prepared from 0.5 to 10 parts by weight of initiator, 0.5 to 30 parts by weight of reactive diluent and 70 to 90 parts by weight of bisphenol A epoxy resin, wherein the initiator comprises a cationic photoinitiator and a sensitizer with a weight ratio of 1 : (0.01 to 1). The cationic visible light curing composition can be cured and molded under the irradiation of visible light, and has the advantages of low requirement on equipment, lower cost, higher safety, smaller environmental pollution, high light sensitivity, and high light curing conversion rate; a curing conversion rate under the low illumination level smaller than 30 mW / cm<2> can reach 50 percent, and the initiator is high in initiation speed and highly efficient; and the cationic visible light curing composition is good in stability, low in toxicity, free from environmental pollution, inexpensive, easy to obtain and low-cost.

Description

technical field [0001] The invention belongs to the technical field of photopolymerization, and in particular relates to a cationic visible light curable composition. Background technique [0002] Bisphenol A type epoxy resin is the one with the smallest curing shrinkage rate among thermosetting resins. It has high adhesive force, and its cured finished products have excellent mechanical properties, chemical resistance and electrical insulation properties, and The price is low, and it is widely used in various fields such as adhesives and rapid prototyping. The traditional process mainly uses thermosetting molding technology to cure it, but the process is complicated and the cost is high. [0003] With the development of epoxy resin light radiation curing molding technology, some progress has been made in the photocuring research of bisphenol A epoxy resin, mainly focusing on the ultraviolet light curing system of bisphenol A epoxy resin. However, the ultraviolet light sou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14
Inventor 陈瑜赵北张宇飞卢仔倚
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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