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. 18, 2001
Filed:
Jul. 16, 1998
Applicant:
Inventors:
Yasuhisa Kishimoto, Kobe, JP;
Masato Kusakabe, Kobe, JP;
Assignee:
Kaneko Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 4/40 ; C08F 4/10 ;
U.S. Cl.
CPC ...
C08F 4/40 ; C08F 4/10 ;
Abstract
A vinyl polymer having a controlled molecular weight and narrow molecular weight distribution is prepared by polymerizing a vinyl monomer using an organic halide polymerization initiator in the presence of a cuprous compound catalyst in a solvent containing an organic compound having a dielectric constant of at least 10 at 25° C., or by polymerizing a vinyl monomer using an organic halide polymerization initiator in the presence of a cuprous compound catalyst and also a specific 1,10-phenanthroline compound.