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:
Nov. 10, 2015
Filed:
Jul. 15, 2011
Fumiaki Nishino, Ichihara, JP;
Takeshi Karino, Ichihara, JP;
Takayuki Onogi, Chiba, JP;
Susumu Murata, Chiba, JP;
Naoto Matsukawa, Ichihara, JP;
Yasunori Yoshida, Ichihara, JP;
Yasushi Nakayama, Ichihara, JP;
Fumiaki Nishino, Ichihara, JP;
Takeshi Karino, Ichihara, JP;
Takayuki Onogi, Chiba, JP;
Susumu Murata, Chiba, JP;
Naoto Matsukawa, Ichihara, JP;
Yasunori Yoshida, Ichihara, JP;
Yasushi Nakayama, Ichihara, JP;
MITSUI CHEMICALS, INC., Tokyo, JP;
Abstract
A method of production of ethylene-based polymer particles includes the steps of: homopolymerizing ethylene or copolymerizing ethylene and a linear or branched α-olefin having 3 to 20 carbon atoms in the presence of an olefin polymerization catalyst including: (A) fine particles having an average particle diameter greater than or equal to 1 nm and less than or equal to 300 nm obtained at least by the following two steps: (Step 1) causing contact between a metal halide and an alcohol in a hydrocarbon solvent; (Step 2) causing contact between a component obtained by (Step 1) and an organoaluminum compound and/or an organoaluminumoxy compound; and (B) a transition metal compound represented in General Formula (I) or (II), and (E) an intrinsic viscosity [η] of the ethylene-based polymer particles, measured in decalin at 135° C., is from 5 to 50 dL/g.