AMIDES AND ETHERS OF PERFLUOROPOLYOXYALKYLENE SULPHONIC- OR PERFLUOROPOLYOXYALKYLENE CARBOXYLIC ACIDS AND A METHOD OF OBTAINING THE SAME

摘要

Amides and ethers of perfluoropolyoxyalkylene sulphonic- or perfluoropolyoxyalkylene carboxylic acids of general formula (I): R_FR¹_FZQ wherein: R_F represents CF₃O-, C₂F₅O-, C₃F₇O-, C₈F₁₇O-, R¹_F represents (a), -(CF₂CF₂O)_nCF₂, - (CF₂CF₂CF₂O)_nCF₂CF₂-, n being 8-55; Z represents -CO-, -SO₂-; Q represents -N(C_mH_2mOH)₂, where m = 2, 3, 4, 6, 8, 10, - N((C₂H₄O)₄C₃H₆OH)₂, -NHC₂H₄OR_n, where R_n = CH₃, C₂H₅, C₃h₇, -NH(C₂H₄O)₅H, OC_LH_2LN(C_LH_2LOH)₂, where L = 2,4 C_KH_2K+1O-, where k = 6, 8, 10. The proposed method of obtaining compounds of general formula (I) involves mixing an anhydrous fluoride of general formula R_FR¹_FZF, in which R_F, R¹_F, n and Z have the meanings shown above, with a secondary or tertiary amine or alkanolamine of general formula H_3-XN(R)_X, in which x = 1, 2, 3 and R represents: - (C_nH_2nH)_x where n = 2, 3, 4, 6, 8, 10; -((C₂H₄O)₄C₃H₆OH)_X where x = 2 or 1; -(C₂H₄OCH₃)₃, -(C₂H₄OC₂H₅)_X, - (C₂H₄OC₃H₇)_X, or -((C₂H₄O)₅H)_X where x = 1; or(C_nH_2nOH)_x where x = 3 and n = 2 or 4, at a temperature of between -25 and +8 ^oC; or alternatively with a higher fatty alcohol C_nH_2n+1OH, where n = 6, 8, 10, and with a compound chosen from the following: an alkali metal- or alkaline-earth metal fluoride, ammonium or aluminium fluoride, and alkali metal carbonate or bicarbonate. The molar ratios of these compounds are 1; (1.2 - 4): 1.5: 3, as appropriate. The mixture is subsequently heated to 40-60 ^oC and allowed to stand at that temperature for 0.6-3.0 hours before the target product is removed.