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. 14, 2003
Filed:
May. 15, 2002
Gwang Hoon Kwag, Taejon, KR;
Seung Hwon Lee, Taejon, KR;
Young Chan Jang, Taejon, KR;
A Ju Kim, Taejon, KR;
Korea Kumho Petrochemical Co., Ltd., Seoul, KR;
Abstract
The invention is related to a novel compound represented by NdHA wherein A is a carboxylate, and to a diene polymerization catalyst using the novel compound. NdHA has monomeric structure and does not contain water, bases and salts. NdHA is mixed with a halogen compound and an organic metal compound to prepare a catalyst system. The catalyst system in the polymerization of 1,3-butadiene (BD) or isoprene produces high cis polydiene with a high activity (100 g BD/4.0×10 mole Nd) and without gel formation. The polydiene thus obtained is useful for tires and golf balls and as a polystyrene modifier.