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:
Mar. 09, 1993
Filed:
Oct. 09, 1991
Applicant:
Inventors:
Seong I Woo, Seoul, KR;
Il Kim, Kyungsangnam-Do, KR;
Assignee:
Korea Advanced Institute of Science and Technology, Daejeon, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
502104 ; 502119 ; 502122 ; 502127 ; 526124 ; 526125 ;
Abstract
A highly active Ziegler-Natta catalyst for polymerizing HDPE and LLDPE at low temperature and pressure may be prepared by reacting a magnesium compound and a halogen compound with an electron donor compound to dissolve, reacting the resulting solution with a titanium compound to obtain the homogeneous solution and then adding a small quantity of surfactant to the homogeneous solution. Ethylene polymers and copolymers were prepared by activating the resulting catalyst to obtain the granular polymer having density of from 0.92 to 0.98 g/cm.sup.3 and in which the particle size distribution was narrow.