N-phenylglycine-(thio)xanthene dye photoinitiating system and application to photopolymer for visible laser exposure

Authors

  • Tsuguo Yamaoka,

    1. Department of Image Science and Technology, Faculty of Engineering, Chiba University, Yayoi-cho, Chiba 260, Japan
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  • Yu-Chuan Zhang,

    1. Department of Image Science and Technology, Faculty of Engineering, Chiba University, Yayoi-cho, Chiba 260, Japan
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    • On leave of absence from Peking Institute of Chemical Engineering, Beijing, China.

  • Ken'ichi Koseki

    1. Department of Image Science and Technology, Faculty of Engineering, Chiba University, Yayoi-cho, Chiba 260, Japan
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Abstract

It was found that the bimolecular type photoinitiators consisting of N-phenylglycine and (thio)xanthene dyes exhibited high initiating efficiency on irradiation of visible light. From the time-resolved spectroscopic study, the free radical is formed by the sensitized decarboxylation of N-phenylglycine in the presence of (thio)xanthene dye. By using these initiating systems, the visible laser sensitive photopolymer was prepared and the imaging characteristics were evaluated.

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