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:
Aug. 08, 2006
Filed:
Mar. 07, 2005
Applicants:
Keiichi Kanaka, Fuji, JP;
Shinya Yamada, Fuji, JP;
Inventors:
Keiichi Kanaka, Fuji, JP;
Shinya Yamada, Fuji, JP;
Assignee:
Polyplastics Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 63/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
It is an object of the present invention to manufacture high quality thermotropic liquid-crystalline polymer generating no low boiling gas and inducing no discoloration resulted from thermal degradation at high yield. To manufacture a liquid-crystalline polymer having 50 mol % or larger ratio of constitutive unit introduced from 4-hydroxybenzoic acid, the reaction is conducted under the presence of an acylating agent and of a catalyst quantity of aromatic sulfonic acid.