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:
Aug. 16, 1977
Filed:
Apr. 13, 1976
Applicant:
Inventors:
Assignee:
Central Glass Co., Ltd., Ube, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C08F / ;
U.S. Cl.
CPC ...
2606 / ;
Abstract
Oligomers of hexafluoropropene are prepared by oligomerization of hexafluoropropene in an organic solvent in the presence of a halide compound and a crown ether. The selectivity to the dimer or trimer may vary depending on the kind of solvent. For example, the oligomerization of hexafluoropropene in acetonitrile or methylene chloride in the vicinity of room temperature gives the dimer thereof at high selectivity. Use of N,N-dimethylformamide favors the formation of the trimer at high selectivity.