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:
Apr. 04, 1989
Filed:
Sep. 14, 1987
Tomohiro Ishikawa, Yokkaichi, JP;
Yozo Kondo, Yokkaichi, JP;
Toyo Soda Manufacturing Co., Ltd., Shinnanyo, JP;
Abstract
Aromatic sulfide amide polymers composed of a repeating unit having the formula (I) and a repeating unit having the formula (II) below, having an inherent viscosity ranging from 0.02 to 10 dl/g. ##STR1## wherein, Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.4 are same or different aromatic rings and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are groups selected from the group consisting of alkyl groups having 1-20 carbon atoms, cycloalkyl group having 3-20 carbon atoms, aryl groups having 6-20 carbon atoms, alkoxyl groups having 1-20 carbon atoms, acyl groups having 2-20 carbon atoms, and aralkyl groups having 7-20 carbon atoms, and the four R's may be the same or different from each other, and a, b, c and d stand for integers from 0-4 and may be the same or different from each other, and the process comprises sulfide forming reaction of an amide group containing dihalogenide expressed by the general formula (III) with an aromatic dihalogenide expressed by the general formula (IV) under the action of a sulfide forming reagent, ##STR2##