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:
Apr. 06, 2004
Filed:
Apr. 22, 2002
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
A process for preparing an ethylene polymer composition comprises a step (I) to prepare an ethylene (co)polymer (i) having [&eegr;] of at least 1.5 times the intrinsic viscosity of a (co)polymer (ii) and a step (II) to prepare an ethylene (co)polymer (ii) having [&eegr;] of 0.3 to 3 dl/g, said steps (I) and (II) using a catalyst containing a component obtained by contacting a liquid Mg compound with a liquid Ti compound in the presence of an organosilicon compound, wherein the step (II) is carried out in the presence of the polymer (i) or the step (I) is carried out in the presence of the polymer (ii), to prepare an ethylene polymer composition having [&eegr;] of 1 to 6 dl/g and a density of not less than 0.94 g/cm . According to the invention, an ethylene polymer composition (particles) having excellent particle morphology, scarcely suffering sintering and having excellent moldability, a process for efficiently preparing the particles of ethylene polymer composition, and a film having small gauge-variation and excellent tear strength can be provided.