New application of 3,5-bis(9-carbazolyl)phenyl-(4-methylphenyl)methanone

A methylphenyl and carbazole-based technology is used in the application field of 3,5-diphenyl-methanone as an ultraviolet photoinitiator, which can solve the problems of small molecular weight, easy volatility, migration, and yellowing of cured coatings. To achieve the effect of increasing the degree of electron transfer, improving stability and photosensitivity, and alleviating oxygen inhibition

Active Publication Date: 2021-05-14
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Benzophenone (BP) is a photoinitiator with simple structure and cheap price, but its molecular weight is small, it is easy to volatilize and migrate during the curing process, and the phenomenon of oxygen inhibition is more obvious
Moreover, the unsubstituted benzene ring is easily oxidized to quinone and the cured coating turns yellow

Method used

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  • New application of 3,5-bis(9-carbazolyl)phenyl-(4-methylphenyl)methanone
  • New application of 3,5-bis(9-carbazolyl)phenyl-(4-methylphenyl)methanone
  • New application of 3,5-bis(9-carbazolyl)phenyl-(4-methylphenyl)methanone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Experimental recipe:

[0021]

[0022] Working conditions:

[0023] Add 3,5-bis(9-carbazolyl)phenyl-(4-methylphenyl)methanone 3g, triethanolamine 2g, 1,6-hexanediol diacrylate into a container equipped with a stirrer 44g, after stirring evenly, add 50g of epoxy propylene carboxylic acid resin, continue stirring to disperse it evenly, and let stand for 5-10 minutes to obtain a transparent photocurable coating. The paint is coated on a glass plate with a brush, the thickness of the film is 75um, and it is irradiated and cured in a medium-pressure mercury lamp, and the power of the mercury lamp is 400W.

Embodiment 2

[0025] Experimental recipe:

[0026]

[0027] Working condition is the same as embodiment 1.

Embodiment 3

[0029] Experimental recipe:

[0030]

[0031] Working condition is the same as embodiment 1.

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Abstract

The present invention provides a new application of 3,5-bis(9-carbazolyl)phenyl-(4-methylphenyl)methanone, that is, as a photoinitiator in an ultraviolet light curing composition. The study found that the compound has strong ultraviolet light absorption performance, and can effectively absorb ultraviolet light of 270-360nm. Because the carbazole group has strong intramolecular electron transfer characteristics, entering it into the structure of the benzophenone skeleton can increase the electron-donating ability of the conjugated system, increase the degree of intramolecular electron transfer, and improve its optical properties. Initiator efficiency, which can improve the stability and photosensitivity of benzophenone compounds. At the same time, it can reduce the release and migration of benzene, and effectively alleviate the phenomenon of oxygen inhibition and yellowing of the cured coating during the curing process. As an ultraviolet photoinitiator, it has good initiating activity and surface curing ability in photocurable compositions.

Description

technical field [0001] The present invention relates to the new application of carbazolyl benzophenone compound, in particular to the application of 3,5-bis(9-carbazolyl)phenyl-(4-methylphenyl)methanone as an ultraviolet photoinitiator . Background technique [0002] In recent years, as an environmentally friendly photocuring technology, it has been vigorously developed and has been widely used in many fields such as coatings, inks, adhesives, electronic devices, and optical fiber materials. Photoinitiators are the main components of photocuring systems. The development of photocuring products depends to a certain extent on the development of photoinitiators in the system. The development of new, efficient and stable photoinitiators has become one of the keys to UV curing technology. Benzophenone (BP) is a photoinitiator with simple structure and cheap price, but its molecular weight is small, it is easy to volatilize and migrate during the curing process, and the phenomeno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/50C09D163/10C09D167/06C09D175/14C09J163/10C09J167/06C09J175/14C09D11/101C09D11/102C09D11/104
CPCC08F2/50C09D11/101C09D11/102C09D11/104C09D163/10C09D167/06C09D175/14C09J163/10C09J167/06C09J175/14
Inventor 张变香施和平赵子任
Owner SHANXI UNIV
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