Industrial Technology Research Institute

Shu-Chen Lin

Kung-Lung Cheng

Woan-Shiow Tzeng

Chih-Hsiang Lin

Wei-Ling Lin

Wen-Ling Lui

Se-Tsun Hong

Cycloaliphatic polyimide, a method for producing the same, and its use

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 number of new phenolepoxy resins are prepared by reacting polyphenol, epihalohydrin and imidazole in a homogeneous reaction medium. These include the following compounds: ##STR1##

Phenolepoxy resins prepared from an aqueous-phase-free process

A process for preparing phenolepoxy resin represented by the following formula: ##STR1## wherein: (a) R.sup.1, R.sup.2, R.sup.3, and R.sup.4, which can be the same or different, are hydrogen, C.sub.1 to C.sub.6 alkyl groups, C.sub.6 to C.sub.10 aromatic groups, or C.sub.1 to C.sub.6 alkyl group-substituted C.sub.6 to C.sub.10 aromatic groups; (b) R.sup.5 and R.sup.6, which can be the same or different, are hydrogen, C.sub.1 to C.sub.6 alkyl groups, C.sub.6 to C.sub.10 aromatic groups, or C.sub.1 to C.sub.6 alkyl group-substituted C.sub.6 to C.sub.10 aromatic groups; ##STR2## (c) R.sup.7 is hydrogen, C.sub.1 to C.sub.6 alkyl groups, C.sub.6 to C.sub.10 aromatic groups, or C.sub.1 to C.sub.6 alkyl group-substituted C.sub.6 to C.sub.10 aromatic groups; (d) R.sup.8 and R.sup.9, which can be the same of different, are hydrogen, C.sub.1 to C.sub.6 alkyl groups, C.sub.6 to C.sub.10 aromatic groups, or C.sub.1 to C.sub.6 alkyl group-substituted C.sub.6 to C.sub.10 aromatic groups; and (e) n is an integer of 0 or 1. The phenolepoxy resin can be advantageously used in making packaging materials for ICs, as a substrate additive for printed circuit boards, and as adhesive for the electronic industry. The process includes the steps of preparing a reaction medium which contains only polyphenol, epihalohydrinl and an imidazole catalyst, and then causing the reaction medium to react in the absence of an aqueous phase.

Process for preparing phenolepoxy resins in the absence of an aqueous

Growing community of inventors

I Lan, Taiwan

Shu-Chen Lin