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:
Jan. 06, 1998
Filed:
Jan. 25, 1996
Ayako Migita, Shizuoka, JP;
Kenji Hijikata, Shizuoka, JP;
Polyplastics Co. Ltd., Osaka, JP;
Abstract
A fibrillar copolyester having excellent heat resistance, a reinforcing effect and a large aspect ratio is produced with high dimensional stability and efficiency. A specific fibrillar copolyester having an aspect ratio of at least 3.0 is produced by polymerizing with shearing specific hydroxy aromatic carboxylic acid monomers as starting materials in a nonpolar solvent having 10 or more carbon atoms. Such hydroxy aromatic carboxylic acid monomers preferably have acetylated hydroxyl groups when copolymerized. Additionally, substituents other than hydrogen atoms optionally may be present on the rings of the aromatic monomers when forming the fibrillar copolyester.