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:
Oct. 08, 2013
Filed:
Sep. 16, 2009
Gwang Hoon Kwag, Daejeon, KR;
Hoochae Kim, Daejeon, KR;
Seung Hwon Lee, Daejeon, KR;
Hwieon Park, Daejeon, KR;
Hyung Kyu Choi, Daejeon, KR;
Gwang Hoon Kwag, Daejeon, KR;
Hoochae Kim, Daejeon, KR;
Seung Hwon Lee, Daejeon, KR;
Hwieon Park, Daejeon, KR;
Hyung Kyu Choi, Daejeon, KR;
Korea Kumho Petrochemical Co., Ltd., Seoul, KR;
Abstract
The present invention relates to a process of preparing 1,4-trans polybutadiene grafted with an aromatic organosulfur compound, the process comprising (a) preparing 1,4-trans polybutadiene by polymerizing 1,3-butadiene or butadiene derivatives in a nonpolar solvent in the presence of a particular catalyst, and (b) preparing the 1,4-trans polybutadiene grafted with an aromatic organosulfur compound by reacting the trans polybutadiene with an aromatic organosulfur compound. The organosulfur molecule in the molecular chain minimizes ultra high molecular weight fraction and narrows the molecular weight distribution, thereby enabling this polymer to show improved processability and tensile properties.