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:
Mar. 16, 1999
Filed:
Mar. 19, 1997
Applicant:
Inventors:
Toru Arai, Machida, JP;
Akihiko Nakamura, Machida, JP;
Shigeru Suzuki, Machida, JP;
Toshiaki Otsu, Machida, JP;
Akio Okamoto, Machida, JP;
Assignee:
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
526347 ; 526126 ; 526127 ; 526131 ; 526132 ; 526133 ; 526160 ; 526170 ;
Abstract
An ethylene-styrene copolymer having a weight average molecular weight of at least 81,000, having a styrene content of from 1 to less than 55% by molar fraction, wherein the stereoregularity of phenyl groups int he alternating structure of ethylene and styrene represented by the following formula (1) contained in its structure, is represented by an isotactic diad index m of more than 0.75, and the alternating structure index .lambda. represented by the following formula (i) is smaller than 70 and larger than 1: