| abstract |
1,194,431. Perfluorinated ether derivatives. MONTECATINI EDISON S.p.A. 18 July, 1967 [22 July, 1966; 16 Dec., 1966], No. 33042/67. Heading C2C. Novel fluorine-containing ethers of the formula or mixtures thereof, wherein L, M and N are from 0 to 99, the sum M+N+L being from 0 to 99 and the ratio (N+L) : (M+1) being from 0 to 2, C 3 F 6 is a unit derived from the opening of the olefinic bond in hexafluoropropylene, the different perfluoroalkylene units having a random distribution along the polymer chain with any terminal CF 3 O(C 3 F 6 O) unit being of the formula CF 3 O-CF 2 CF(CF 3 )O, and X is a hydrogen atom or a radical of the formula -COOH, -COOMe, -COOR, -COF, -COCl, -COBr, -CONR<SP>1</SP>R<SP>11</SP> or -C#N, Me being an equivalent of an electropositive metal, R being a C 1-12 alkyl, cycloalkyl, or aryl radical, and R<SP>1</SP> and R<SP>11</SP> each being a hydrogen atom or a C 1-12 alkyl, aryl or cycloalkyl radical, are obtained by reacting compounds of the formula with an excess up to 200% of alkali or alkalineearth bases or solutions thereof in water or in other proton donor solvents at 10 to 180 C., to give compounds of the above formula in which X is a hydrogen atom and/or a -COOMe radical, where Me is an alkali or alkaline-earth metal, and, if desired, acidifying compounds of the latter formula and converting them into other functional derivatives, e.g. by reaction with ammonia or diazomethane. Compounds of the above formula in which X is a hydrogen atom are useful as lubricants, inert fluids for heat or hydraulic transmission or as dielectric media (see Division C5). Fluoroform and salts of trifluoroacetic acid may be produced as by-products. |