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:
Feb. 02, 1993
Filed:
May. 14, 1990
Komei Yamasaki, Chiba, JP;
Funaki Keisuke, Ichihara, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
Disclosed are a styrene polymer molding material which has a high degree of syndiotacticity, a weight average molecular weight of 50,000 or more, and at least one melting points of 285.degree. C. or higher, and a process for producing the same by melting a styrene polymer having a high degree of syndioacticity and then molding it under a stress of 1.times.10.sup.6 dyne/cm.sup.2 or higher. The styrene polymer molding material of the present invention has excellent heat resistance. In addition, according to the process of the present invention, the above polymer molding material having excellent heat resistance can be prepared by a simple operation, and thus has marked advantages for practical use.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile