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. 31, 1982
Filed:
Dec. 24, 1980
Kurt Baum, Pasadena, CA (US);
Clifford D Bedford, Mountain View, CA (US);
Ronald O Hunadi, Los Angeles, CA (US);
Fluorchem Inc., Azusa, CA (US);
Abstract
A perfluoroalkylene .alpha.,.omega.-diacetylene compound having a fluorocarbon chain of from 5 to about 20 carbon atoms between two acetylene end groups, and a method of forming same by first carrying out the addition reaction of a perfluoroalkylene diiodide having the formula I(CF.sub.2).sub.n I, where n is a whole number from 5 to about 20, inclusive, and trimethylsilyacetylene in the presence of a free radical catalyst to form (CH.sub.3).sub.3 SiIC.dbd.CH(CH.sub.2).sub.n CH.dbd.CISi(CH.sub.3).sub.3 ; subjecting the (CH.sub.3).sub.3 SiIC.dbd.CH(CF.sub.2).sub.n CH.dbd.CISi(CH.sub.3).sub.3 to dehydrohalogenation with DBU under dry conditions to obtain (CH.sub.3).sub.3 SiC.tbd.C(CF.sub.2).sub.n C .tbd.CSi(CH.sub.3).sub.3 ; and removing the silyl group from the latter compound with excess DBU or KF to yield HC.tbd.C(CF.sub.2).sub.n C.tbd.CH as the perfluoroalkylene .alpha.,.omega.-diacetylene compound. The HC.tbd.C(CF.sub.2).sub.n C.tbd.CH compounds can be trimerized to produce clear, hard, cross-linked resins suitable for use as coatings on bearings and in the manufacture of aircraft windshields. Monofunctional counterparts of the HC.tbd.C(CF.sub.2).sub. n C.tbd.CH compounds can be formed by substituting perfluoroalkyl primary iodides for the diiodides in the above-disclosed sequence of reactions. The resulting compounds (fluorinated monofunctional acetylenes) can be trimerized to yield liquids suitable as lubricating oils, hydraulic fluids, etc.