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:
Sep. 02, 2003
Filed:
Nov. 23, 1998
Hideki Sato, Ikku-cho, Niihama-shi, Ehime, 792-0025, JP;
Hiroaki Katayama, Daijuku, Sodegaura-shi, Chiba, 299-0241, JP;
Kazuki Wakamatsu, Naguraekimae, Sodegaura-shi, Chiba, 299-0246, JP;
Sumitomo Chemical Comoany, Limited, Osaka, JP;
Abstract
A method for feeding a boron compound, which comprises feeding at least one boron compound selected from (1) to (3) described below in the state suspended or slurried in a solvent continuously to a reactor; a boron compound in the form of fine particles being one or more boron compounds selected from (1) to (3) described below and having a maximum particle diameter of 50 &mgr;m or less; a catalyst component for olefin polymerization consisting of said boron compound in the form of fine particles; a method for producing a boron compound in the form of fine particles which comprises dissolving one or more boron compounds selected from (1) to (3) described below in an aromatic hydrocarbon solvent and then precipitating in an aliphatic hydrocarbon solvent; and a method for producing a boron compound in the form of fine particles which comprises pulverizing one or more boron compounds selected from (1) to (3) described below so that their maximum particle diameter is 50 &mgr;m or less. (1) a boron compound represented by the general formula: BQ Q Q , (2) a boron compound represented by the general formula: G (BQ Q Q Q ) , and (3) a boron compound represented by the general formula: (L-H) (BQ Q Q Q ) .