(per) fluoropolyether carboxylic acids and use thereof for...

Details (per) fluoropolyether carboxylic acids and use thereof for... (per) fluoropolyether carboxylic acids and use thereof for...

C - Chemistry, Metallurgy

07

C

C07C 59/315 (2006.01) C07C 51/09 (2006.01) C07C 51/367 (2006.01) C08G 65/00 (2006.01) C08G 65/332 (2006.01) D21H 17/14 (2006.01) D21H 21/16 (2006.01)

Patent

CA 2469242

Carboxylic acids comprising perfluoropolyether chains, of for- mula: T1-CFW1-O-Rf-CFW2-T2 (I) wherein T1, T2, equal to or different from each other, are selected from the group formed of -CH2-B-Y- (COOH) n, -CH (CF3} O- Y (COOH) n, -F, -CF3, -C2F5, - (C2F4} C1, wherein B = -O- or -S-; y - Cl-C20 alkylene chain, n = 1-4; with the proviso that at least one of the two end groups T1, T2 be -CH2-B-Y-(COOH)n, -CH(CF3)O-Y(COOH)n; W1, W2, equal to or different from each other, are -F or -CF3; Rf is a (per)fluoropolyoxyalkylene chain formed of one or more repeating units, statistically distributed along the chain, having a number average molecular weight in the range 500-10,000.

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