LED-curable low migration photoinitiators

A technology of photoinitiators and groups, which is applied in the field of photoinitiators and can solve problems such as low efficiency

Active Publication Date: 2018-01-09
IGM GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are polymer versions of ITX available, but they are not as efficient as ITX itself

Method used

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  • LED-curable low migration photoinitiators
  • LED-curable low migration photoinitiators
  • LED-curable low migration photoinitiators

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0154] Example 1. Synthesis of low mobility photoinitiators. Step 1: Synthesis of bis(4-(piperazin-1-yl)phenyl)methanone (“MK(pipaz) 2 ", where "MK" is the abbreviation of Michler's ketone)

[0155]

[0156] Every step of the process takes place in a room equipped with UV-filtering lighting. Piperazine (344.60 g, 4.00 mol), 4,4'-difluorobenzophenone (DFBP) (87.30 g, 0.400 mol), dimethyl Sulfoxide (DMSO; 500 g) was added to the 1 L reaction flask to form an opaque white slurry. The slurry was heated at 145°C for several days for 40 hours using an open system with an uncooled condenser (to minimize piperazine condensation).

[0157] After 40 hours, the heat was removed and the reaction mixture was poured hot into a beaker with 2000 g of ice, which itself was contained in an ice bath. The flask was then washed with deionized water (100 g) and DMSO (100 g). A cloudy slurry formed. The slurry was then filtered on a Büchner funnel to collect a waxy solid. The solid was col...

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Abstract

A photoinitiator includes a benzophenone moiety, a nitrogen-containing moiety covalently bonded to the benzophenone moiety, and an unsaturated polymerizable moiety covalently bonded to the nitrogen-containing moiety. The unsaturated polymerizable moiety includes an acrylate group or a methacrylate group.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 099,728, filed January 5, 2015, the entire contents of which are incorporated herein by reference. technical field [0003] The present technology generally relates to photoinitiators for polymerization. More specifically, it relates to photoinitiators that can be combined with the resulting polymer when photoinitiated by an LED light source. Background technique [0004] The market for UV curable printing inks and coatings is changing from using mercury light sources to light emitting diode (LED) light sources. Currently, commercial photoinitiators employed in these formulations are optimized for the short wavelength emission of mercury lamps and are very inefficient at the longer wavelengths associated with LED light sources. There are some photoinitiators that are effective at longer wavelengths, such as isopropylthioxanthone (ITX) and Mich...

Claims

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Application Information

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IPC IPC(8): C08F20/18C08F2/50C08F222/10
CPCC08F2/50C09D4/00C07D295/15C08F20/18C08F122/1006C08F222/104C09D7/63C07D241/04C08K5/175C08K5/3432C08K5/3462C09D4/06C09D11/101C08F222/103
Inventor保罗·沙锐
OwnerIGM GROUP