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:
May. 02, 2023
Filed:
Aug. 21, 2018
Lotte Chemical Corporation, Seoul, KR;
Hyun Yul Woo, Daejeon, KR;
Rai Ha Lee, Daejeon, KR;
Su Jeong Jeong, Daejeon, KR;
Joon Keun Min, Daejeon, KR;
Eun Hye Shin, Daejeon, KR;
Byung Hun Chae, Daejeon, KR;
LOTTE CHEMICAL CORPORATION, Seoul, KR;
Abstract
Disclosed is a method using a metallocene catalyst system so as to control the polymer structure of a diene-modified polypropylene through process simplification, thereby being capable of preparing a hyperbranched polypropylene resin having a low gel content and improved melt strength. The present invention provides a method using a catalyst so as to polymerize propylene and a diene compound, thereby preparing a diene-modified polypropylene resin having a branching index of 0.95 or less, a gel content of 3 wt % or less and an advanced rheometric expansion system (ARES) melt strength of 5 g or more.