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:
Sep. 22, 2009
Filed:
Oct. 27, 2005
Jun-seong Lee, Anyang-si, KR;
Young-kyu DO, Gongju-si, KR;
Young-jo Kim, Daejeon, KR;
Doh-yeon Park, Daejeon, KR;
You-mi Jeong, Daejeon, KR;
Min-hyung Lee, Daejeon, KR;
Jun-seong Lee, Anyang-si, KR;
Young-kyu Do, Gongju-si, KR;
Young-jo Kim, Daejeon, KR;
Doh-yeon Park, Daejeon, KR;
You-mi Jeong, Daejeon, KR;
Min-hyung Lee, Daejeon, KR;
LG Chem, Ltd., , KR;
Abstract
Disclosed is a multinuclear transition metal half metallocene catalyst having a multinuclear half metallocene structure in which a transition metal of groups 3 to 10 on periodic table is connected to a cycloalkandienyl group or its derivative group on a side and also connected to phenol or phenolamine compound having a plurality of binding sites on another side. The metallocene catalyst is useful to produce syndiotatic styrene polymer having superior steroreguality, high melting point and broad molecular weight distribution with high activity together with a small amount of a cocatalyst. Further disclosed is a method for preparing styrene polymers using the same catalyst.