Industrial Technology Research Institute

Se-Tsun Hong

Kung-Lung Cheng

Shin-Shin Wang

Meng-Song Yin

Woan-Shiow Tzeng

Jie-Hwa Ma

Shu-Chen Lin

Hung-Chou Kang

Kuo-Yuan Hsu

The present invention provides a novel method for the preparation of N-azidosulfonyl-arylimides, which are known as photo-initiators. At the outset, substitution reaction of 4-acetamidobenzenesulfonyl halide with MN,(M denotes hydrogen or alkaline metal) provides the corresponding azide. After de-protection to remove the actyl group, aminoarylsulfonyl azide is extracted with organic solvent, and the extract is directly used for addition reaction with maleic anhydride without concentration. Finally, end products are obtained by dehydration of the addition products using acetic anhydride/metal acetate, followed by re-crystallization in alcohol solvent. The end products are obtained in purer form and greater yield than that in conventional methods.

Method for preparing azide photo-initiators

A triazine compound having formula I or formula II:

Triazine hardener and epoxy composition containing the same

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I Lan, Taiwan

Se-Tsun Hong