| abstract |
1,224,410. Perfluoroalkyl ether derivatives. E.I. DU PONT DE NEMOURS & CO. 7 March 1968 [7 March, 1967; 16 Feb., 1968], No. 62480/69. Divided out of 1,201,996. Heading C2C. [Also in Divisions B2, C5 and C7] Novel perfluoroalkyl ether amides of the formula wherein Rf is a C 1-6 perfluoroalkyl group; n is from 0 to 8; A is an anion the ammonium salt of which (NH 4 A) has a water-solubility of at least 1% by weight; and Q is a C 4-25 radical of the formula (1) -C f H 2p -NR<SP>2</SP>R<SP>3</SP>R<SP>4</SP>, where each of R<SP>2</SP>-R<SP>4</SP> is a C 1-18 alkyl group, the total number of carbon atoms in the three radicals being from 3 to 20, or Q is one of the radicals (2) -C p H 2p NR<SP>5</SP> = Y; (provided that where Q is (3) or (4) the anion A is a halide ion) where p is from 1 to 12, Y is -(CH 2 ) 4 -, -(CH 2 ) 5 - or -(CH 2 ) 2 O-(CH 2 ) 2 -, R 5 is a C 1-16 alkyl radical provided that the total number of carbon atoms in R<SP>5</SP> and Y is from 5 to 20 and R<SP>6</SP> is a C 1-4 alkyl group, the above heterocyclic ring moieties optionally bearing up to three halo or methyl substituents, are obtained by quaternating appropriate tertiary amines or alkylating and quaternating appropriate primary or secondary amines. The amides are useful as floatation agents, surface-active agents, mould-release agents and anti-corrosion agents (see Divisions B2, C5 and C7). Amido tertiary amines having the above formula in which the nitrogen atom in the radical Q is not quaternated, may be obtained by various methods from the corresponding acyl fluorides of the formula Alkyl perfluoroalkyl acid esters of the formula where R is an alkyl group may be obtained as intermediates in these processes. |