The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 1993
Filed:
Feb. 20, 1991
Tatsuya Hattori, Tokyo, JP;
Hiroshi Akita, Asaka, JP;
Yoshio Imai, Tokyo, JP;
Masaaki Kakimoto, Yokohama, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An aromatic polythiazole is produced from a salt of an aromatic diaminodithiol compound and a dicarboxylic acid derivative, by a method comprising the steps of: (a) reacting the aromatic diaminodithiol compound salt with an alkyl halide having a substituted or unsubstituted alkyl group in an alkaline aqueous solvent, so that hydrogen atoms in thiol groups of the aromatic diaminodithiol compound are substituted with the alkyl groups; (b) polymerizing the resulting alkyl group-substituted aromatic diaminodithiol compound with the dicarboxylic acid derivative to form an aromatic polythiazole prepolymer; and (c) heating the aromatic polythiazole prepolymer to cause a thiazole ring closure reaction, thereby producing the aromatic polythiazole. By this method, the amino groups of the aromatic diaminodithiol compound salt are selectively reacted with the dicarboxylic acid derivative.