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Cationic photopolymerization initiator

外国特許コード F120006100
整理番号 S2008-0171
掲載日 2012年1月6日
出願国 アメリカ合衆国
出願番号 92227808
公報番号 20110021654
公報番号 8293809
出願日 平成20年12月11日(2008.12.11)
公報発行日 平成23年1月27日(2011.1.27)
公報発行日 平成24年10月23日(2012.10.23)
国際出願番号 JP2008072545
国際公開番号 WO2009113217
国際出願日 平成20年12月11日(2008.12.11)
国際公開日 平成21年9月17日(2009.9.17)
優先権データ
  • 特願2008-061205 (2008.3.11) JP
  • 2008JP072545 (2008.12.11) WO
発明の名称 (英語) Cationic photopolymerization initiator
発明の概要(英語) An object of the present invention is to provide a novel cationic photopolymerization initiator that efficiently absorbs light and generates protons.
As a means of achieving the object above, a preferred cationic photopolymerization initiator of the present invention includes an initiator comprising a bismuthonium salt represented by the following general formula (II): Wherein R11, R12, and R13 may be the same or different and are each an optionally substituted monocyclic aryl group or an optionally substituted monocyclic heteroaryl group, R14 is an optionally substituted fused polycyclic aromatic group or an optionally substituted fused polycyclic heterocyclic group, and X− is an anion associated with a cation.
従来技術、競合技術の概要(英語) BACKGROUND ART
As is widely known, in recent years, as photo-curable resin compositions for use in printing ink, paint, a coating material, and the like, those utilizing a cationic photopolymerization reaction have attracted attention as well as those utilizing a radical photopolymerization reaction.
A photo-curable resin composition utilizing a cationic photopolymerization reaction contains, as main components, a cationic photopolymerizable compound, which contains, for example, an epoxy group, an oxetane group, a vinyl ether group, etc., and a cationic photopolymerization initiator for the polymerization of such a compound.
The cationic photopolymerization initiator plays a role in generating protons to initiate a cationic photopolymerization reaction.
Well known examples thereof include sulfonium salt based cationic photopolymerization initiators and iodonium salt based cationic photopolymerization initiators.
A cationic photopolymerization initiator is required to have such characteristics that, for example, it efficiently absorbs light, the bond between the cation atom and the carbon atom of the substituent (e.g., S+-Ph bond or I+-Ph bond) is easily cleaved, and the cation atom is susceptible to reduction.
Some of the already commercially available cationic photopolymerization initiators are excellent in these characteristics, but there is a demand for a cationic photopolymerization initiator with further improved characteristics.

特許請求の範囲(英語) [claim1]
1. A cationic photopolymerization initiator characterized by comprising a bismuthonium salt represented by the following general formula (I):

wherein R1, R2 and R3 may be the same or different and are each an optionally substituted monocyclic aryl group or an optionally substituted monocyclic heteroaryl group,
R4 is an optionally substituted fused polycyclic aromatic group or an optionally substituted fused polycyclic heterocyclic group and
X- is an anion associated with a cation.
[claim2]
2. A cationic photopolymerization initiator according to claim 1, characterized in that R1, R2, and R3 are each an optionally substituted monocyclic aryl group.
[claim3]
3. A cationic photopolymerization initiator according to claim 1, characterized in that X- is PF6-, SbF6-, AsF6-, BF4-, ORf-, NRf2-, or B(Ar)4-, wherein Rf is a perfluoroalkylsulfonyl group and Ar is an optionally substituted aryl group.
[claim4]
4. A method for polymerizing a cationic photopolymerizable compound characterized by using a cationic photopolymerization initiator according to claim 1.
[claim5]
5. A method according to claim 4, characterized in that the cationic photopolymerizable compound is a compound containing at least one member selected from an epoxy group, an oxetane group, and a vinyl ether group.
[claim6]
6. A photo-curable resin composition characterized by at least comprising a cationic photopolymerizable compound and a cationic photopolymerization initiator according to claim 1.
[claim7]
7. A -cured product characterized by being obtainable by curing a photo-curable resin composition according to claim 6.
[claim8]
8. A. bismuthoniurn salt characterized by being represented by the following general formula (II):

wherein R11, R12, and R13 may be the same or different and are each an optionally substituted monocyclic aryl group or an optionally substituted monocyclic heteroaryl group,
R14 is an optionally substituted used polycyclic aromatic group or an optionally substituted fused polycyclic heterocyclic group, and
X- is an anion. associated with a cation.
  • 発明者/出願人(英語)
  • MATANO YOSHIHIRO
  • IMAHORI HIROSHI
  • KYOTO UNIVERSITY
国際特許分類(IPC)
米国特許分類/主・副
  • 522/31
  • 522/25
  • 522/29
  • 522/66
  • 522/134
  • 522/135
  • 522/143
  • 522/168
  • 522/170
  • 522/178
  • 522/181
  • 522/184
  • 522/189
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