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. 16, 2021
Filed:
Dec. 07, 2017
Lg Chem, Ltd., Seoul, KR;
Jin Young Kim, Daejeon, KR;
Jun Seok Ko, Daejeon, KR;
No Ma Kim, Daejeon, KR;
Yu Jin Kim, Daejeon, KR;
Ki Seok Son, Daejeon, KR;
Hae Sung Sohn, Daejeon, KR;
Ro Mi Lee, Daejeon, KR;
Sang Mi Lee, Daejeon, KR;
Tae Chui Lee, Daejeon, KR;
He Seung Lee, Daejeon, KR;
Abstract
The present invention relates to a method for preparing a modified conjugated diene-based polymer, and more particularly, provides a method for preparing a modified conjugated diene-based polymer including a step of polymerizing a conjugated diene-based monomer in the presence of an organometal compound in a hydrocarbon solvent to prepare an active polymer which is coupled with an organometal (S1); and a step of reacting or coupling the active polymer prepared in step (S1) with a modifier (S2), wherein step (S1) is continuously performed in two or more polymerization reactors, and a polymerization conversion ratio in a first reactor among the polymerization reactors is 50% or less.