Polymerizable photoinitiator based on benzanthrone and preparation method of polymerizable photoinitiator

A technology for polymerizing a photoinitiator and benzranthrone, which is applied in the field of a polymerizable photoinitiator based on benzranthrone and its preparation, can solve the problems of yellowing, easy sublimation and migration, and bad odor of cured products, and reduces the Volatility and mobility, improved compatibility, reduced mobility effects

Active Publication Date: 2020-02-14
ANQING FEIKAI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the existing photoinitiator is used alone, it is easy to sublimate and migrate, causing the material to turn yellow. The patent JP2001348412A discloses 2-methyl-1-[4-(methyl Thio)phenyl]-2-(4-morpholino)-1-propanone as a liquid hardening resin composition of photoinitiator component
However, the aromatic ring system in the compound structure contains a methylthio group, so there is a problem of bad smell after light cracking, and yellowing of the cured product.

Method used

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  • Polymerizable photoinitiator based on benzanthrone and preparation method of polymerizable photoinitiator
  • Polymerizable photoinitiator based on benzanthrone and preparation method of polymerizable photoinitiator
  • Polymerizable photoinitiator based on benzanthrone and preparation method of polymerizable photoinitiator

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Embodiment 1

[0032] The synthetic equation of the polymerizable photoinitiator based on benzothrone:

[0033] Wherein n=1~6.

Embodiment 2

[0035] The preparation method of the polymerizable photoinitiator based on benzoanthrone comprises the following steps:

[0036] (1) Add 200g of polyethylene glycol (PEG100), 50g of 3-bromobenzoxanthrone and 100g of potassium carbonate successively in a three-necked flask, heat up to 120°C after stirring, and monitor the reaction process with TLC (polyethylene:polypropyleneethylene glycol) ester=1:1), after reacting for 8 hours, cool to room temperature, add 250mL dichloromethane and 250mL water successively, stir for 30min and then stand for stratification to obtain aqueous phase and organic phase, add 250mL dichloromethane to the obtained aqueous phase Extract again, combine the extracted product with the organic phase, add anhydrous sodium sulfate to dry, distill methylene chloride under reduced pressure at 40°C in a water bath, and obtain an intermediate product, which is a yellow liquid (50g), which is directly used for Step (2); Wherein vacuum distillation is prior art; ...

Embodiment 3

[0039] The preparation method of the polymerizable photoinitiator based on benzoanthrone comprises the following steps:

[0040] (1) Add 200g of polyethylene glycol (PEG200), 50g of 3-bromobenzoxanthrone and 100g of potassium carbonate successively in a three-necked flask, stir and then heat up to 125°C. The reaction process is monitored by TLC (polyethylene:polypropyleneethylene glycol) ester=1:1), after reacting for 8 hours, cool to room temperature, add 250mL dichloromethane and 250mL water successively, stir for 30min and then stand for stratification to obtain aqueous phase and organic phase, add 250mL dichloromethane to the obtained aqueous phase Extract again, combine the extracted product with the organic phase, add anhydrous sodium sulfate to dry, and distill off methylene chloride under reduced pressure at 30°C in a water bath to obtain an intermediate product. The intermediate product is a yellow liquid (50 g), which is directly used for Step (2); Wherein vacuum dis...

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Abstract

The invention discloses a polymerizable photoinitiator based on benzanthrone, relates to the technical field of photoinitiators, and provides the photoinitiator based on the problem that a conventional photoinitiator causes yellowing of a material; the photoinitiator has the structural general formula described in the specification, wherein n=1-6. The invention also provides a preparation method of the photoinitiator. The photoinitiator has the beneficial effects that according to the prepared photoinitiator, polyethylene glycol is introduced into benzanthrone, so that the compatibility of thephotoinitiator and a polymerization system is improved; and meanwhile, unsaturated double bonds are introduced into initiator molecules, so that the volatility and mobility of the photoinitiator arereduced.

Description

technical field [0001] The invention relates to the technical field of photoinitiators, in particular to a polymerizable photoinitiator based on benzoantrone and a preparation method thereof. Background technique [0002] Photocuring has been widely used in many important technical fields, especially because of its own advantages, low VOC release, is a green technology, mainly used in fast curing coatings, printing inks and adhesives. Photoinitiators play an important role in the UV curing system, they can absorb the energy of specific wavelengths to generate active species to initiate the polymerization of the entire system. The photoinitiators currently used for polyethylene crosslinking can be divided into two categories: cracking photoinitiators and hydrogen abstraction photoinitiators. After the cracking photoinitiator absorbs the energy of ultraviolet light and jumps to the excited state, it breaks the bond itself to generate free radicals. Such initiators mainly inc...

Claims

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Application Information

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IPC IPC(8): C07C45/64C07C45/61C07C49/755C08F2/50C08F255/02C08F220/30
CPCC07C45/64C07C45/61C08F2/50C08F255/02C07C49/755
Inventor 胡来月钟晓峰王婷代俊陶钱铸杨梅
Owner ANQING FEIKAI NEW MATERIAL CO LTD
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