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:
Jul. 18, 1989
Filed:
Nov. 05, 1987
Bobby F Dannels, Grand Island, NY (US);
Deborah J Olsen, Grand Island, NY (US);
Occidental Chemical Corporation, Niagara Falls, NY (US);
Abstract
Telomers are prepared by reacting chlorotrifluoroethylene with 1,1,2-trichlorotrifluoroethane (CCl.sub.2 FCF.sub.2 Cl) in the presence of metallic iron or stainless steel, and optionally, a halide-containing compound selected from the group consisting of tetrabutyl ammonium bromide, tetramethyl ammonium chloride, n-chlorosuccinimide, triethylamine hydrochloride, LiCl, MoCl.sub.5 and FeCl.sub.3. The reaction is conducted at a temperature of from about 150.degree. C. to about 200.degree. C. in a nitrile group-containing solvent selected from the group consisting of acetonitrile, propionitrile and ethyl cyanoacetate. Preferably, the CCl.sub.2 FCF.sub.2 Cl and chlorotrifluoroethylene are present in a mole ratio of from about 1:1 to about 3:1. respectively, to minimize the amount of high molecular weight species formed during the reaction. The telomers of this invention are useful for preparing non-flammable hydraulic fluids.