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:
Mar. 20, 1979
Filed:
Nov. 30, 1977
Applicant:
Inventors:
Takao Hayashi, Zushi, JP;
Shoichi Kawakami, Yokohama, JP;
Assignee:
Asahi Glass Company Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
260987 ; 260924 ; 260925 ; 260955 ;
Abstract
An aqueous dispersion of an ethanol amine salt of polyfluoroalkyl phosphate is prepared by using a polyfluoroalkanol, a phosphorus oxyhalide water and an ethanol amine. The process for producing a polyfluoroalkyl phosphate comprises the first step of reacting a polyfluoroalkanol containing small amount of water with phosphorus oxyhalide and the second step of producing a polyfluoroalkyl phosphate by hydrolyzing the reaction product and the third step of reacting the reaction product with ethanol amine in a large amount of water.