Sumitomo Bakelite Company Limited

Masako Okanuma

Nobuhiro Higashida

Takashi Enoki

Yuichi Ishida

Hidenori Saito

Tatsuhiro Yoshida

Yoko Hase

Tadahiro Ishikawa

Masanori Fujimoto

A novel aromatic carboxylic acid useful as a material for macromolecular compounds and, in particular, for polycondensed macromolecular compounds exhibiting excellent heat resistance, an acid halide derivative thereof and a process for producing these compounds are disclosed. The aromatic carboxylic acid and the acid halide derivative thereof have structures represented general formulae (1) and (2), respectively, and can be efficiently produced from a dialkyl ester derivative of isophthalic acid and an acetylene derivative in accordance with the disclosed process comprising specific steps.In the above formulae, A represents:&#x2014;C&#x2261;C&#x2014;R&#x2003;&#x2003;(a)or(Rrepresents hydrogen atom, an alkyl group or an aromatic group, Rrepresents an alkyl group or an aromatic group) and X represents a halogen atom.

Aromatic carboxylic acids, acid halides thereof and processes for preparing both

Precursor of a heat resistant resin, heat resistant resin, insulating film and semiconductor device

Growing community of inventors

Jyoetsu, Japan

Masako Okanuma