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:
Oct. 09, 2001
Filed:
Apr. 15, 2000
Applicant:
Inventors:
Yuichi Tokumoto, Chigasaki, JP;
Koichi Ohashi, Kawasaki, JP;
Toshio Okada, Yokohama, JP;
Tsutomu Takashima, Kawasaki, JP;
Assignee:
Nippon Petrochemicals Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 4/14 ; C08F 1/010 ;
U.S. Cl.
CPC ...
C08F 4/14 ; C08F 1/010 ;
Abstract
It is possible to produce butene polymer at high yield, which polymer contains 80 mol % or more of polymer molecules having terminal vinylidene structure and being low in the content of residual organic fluorine by a process comprising Step (I) to polymerize in liquid phase by adding complex catalyst composed of boron trifluoride, ether and alcohol and/or water in specified ratios to C,fractions and Step (II) to reduce the content of trimer and lighter components contained in the obtained polymer to 0.2% by weight or less by distillation.