Agency of Industrial Science and Technology

Ministry of International Trade & Industry

Agency of Industrial Science and Technology Ministry of International

Toda Kogyo Corporation

Japan As Represented by Director General of Agency of Industrial Science

Japan, As Represented by Director General of Agency of Industrial

Kyoji Kaeriyama

Susumu Tanaka

Yoshio Suda

Yukimichi Nakao

Masaaki Sato

Aizo Yamauchi

Takao Hiraide

Nanao Horiishi

Tomoyuki Imai

Masa-aki Sato

Yukimichi Nako

Kohzo Ito

Yoshikazu Tanabe

Osamu Oze

Disclosed is a novel polymeric compound poly(benzoic acid) which is a linear polymer consisting of the 1,4-phenylene linkages, each phenylene group having a carboxyl group. Poly(benzoic acid) can be prepared by hydrolyzing a poly(alkyl benzoate) in the presence of an acid or alkali. The thus obtained poly(benzoic acid) can be converted into a poly(p-phenylene) by the decarbonation reaction thereof in an organic solvent such as quinoline in the presence of metallic copper dust or a copper (II) compound such as copper (II) oxide and copper (II) carbonate hydroxide.

Poly(benzoic acid), method for the preparation thereof and method for

Poly(benxoic acid), method for the preparation thereof and method for

A quaternary ammonium trihalide, a novel compound, represented by the formula:

Quaternary ammonium trihalide and method for dissolution of metal with

From an ore containing gold and silver, the gold and silver are extracted by a method which comprises pulverizing the ore and bringing the pulverized ore into contact with an elemental halogen, a halogenated salt, and an organic solvent thereby converting the gold and silver into polyhalogeno anionic complexes and consequently dissolving them in the organic solvent.

Method for extraction of gold and silver from ore with a solution

A metal is dissolved by a method which comprises establishing contact of the metal with a quaternary ammonium compound and a halogenated hydrocarbon or with a quaternary ammonium compound, a halogenated hydrocarbon, and a polar solvent.

Method for dissolution of metal

A polymer produced by removing an electrolytic ion from a polymer doped with the electrolytic ion possesses a nonlinear conductivity. An element made of this polymer, on exposure to a sine wave electric field, generates a higher harmonic wave.

Low frequency nonlinear electric material and method for generation of

A colored macromolecular polymer is produced by a method which comprises dissolving a soluble salt of a noble metal in a liquid monomer, polymerizing the monomer having the soluble salt of the noble metal dissolved therein, and subjecting the resultant solid polymer to a heat treatment at a temperature equal to or exceeding the colloid-forming temperature of the noble metal.

Method for production of colored macromolecular polymer

A metal is dissolved by being brought into contact with at least one halogenated hydrocarbon in the presence of a cationic surfactant.

A thiophene derivative polymer comprising repeating units of the formula: ##STR1## (wherein R stands for one member selected from the group consisting of ##STR2## and a polymer composition having the polymer doped with an anion and consequently possessing a semiconducting characteristic.

Thiophene derivative polymer and a polymer composition thereof

Disclosed herein is a process for producing electroconductive fibrous shaped-articles comprising the steps of:

Process for producing electroconductive fibrous shaped-articles

A 3-n-alkylthiophene polymer of the general formula: ##STR1## (wherein n stands for an integer in the range of 5 to 11 and m for an integer in the range of 80 to 350) and a composition containing this polymer.

3-N-higher alkylthiophene polymer and composition thereof

A polymer composition having poly-[2,5-(3-ethylthienylene)] doped with an anion is obtained by electrochemically polymerizing 3-ethylthiophene in an anion-containing salt as an electrolyte. Poly-[2,5-(3-ethylthienylene)] is obtained by electrochemically reducing the polymer composition thereby removing the anion therefrom. The aforementioned polymer composition and poly-[2,5-(3-ethylthienylene)] are novel substances.

Growing community of inventors

Tsuchiura, Japan

Kyoji Kaeriyama