Mitsubishi Chemical Corporation

Yuuichi Nishida

Masaaki Miyamoto

Masanori Yamamoto

Shingo Namiki

Michiaki Fuji

Kiyoji Kuma

Shin-ichi Sato

Tatsuya Hitomi

Toshimitu Inoue

Naoya Kageyama

Takahiro Fukumoto

A polyamide resin comprising a dicarboxylic acid constitutional unit comprising an adipic acid unit and a diamine constitutional unit comprising a pentamethylenediamine unit and a hexamethylenediamine unit wherein a weight ratio of the pentamethylenediamine unit to the hexamethylenediamine unit being in the range of 95:5 to 60:40; a vibration-welded molded product having an excellent vibration welding strength, a hinged molded product and a binding band having an excellent low-temperature toughness, and a filament having an excellent transparency which are obtained from the polyamide resin; and a hinged molded product comprising a polyamide resin constituted of an adipic acid unit and a pentamethylenediamine unit.

Polyamide resin and hinged molded product

The process for producing an aromatic polycarbonate of the present invention comprises subjecting an aromatic diol compound and a carbonic acid diester to transesterification reaction in the presence of a defoaming agent. In the process of the present invention, it is possible to produce a transparent and colorless aromatic polycarbonate having a high quality, at a high polymerization velocity without occurrence of significant foaming phenomenon.

Process for producing aromatic polycarbonate and aromatic polycarbonate composition

Disclosed herein is a method of improving the stability of N-vinylamides. A quinone or alkali-modified quinone is added to the N-vinylamide. The loss of the N-vinylamide due to polymerization and/or decomposition during distillation is significantly reduced.

Method of stabilizing N-vinylamides

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Kitakyushu, Japan

Yuuichi Nishida