Aqueous compositions containing perfluoropolyether...

Details Aqueous compositions containing perfluoropolyether... Aqueous compositions containing perfluoropolyether...

D - Textiles, Paper

21

H

D21H 19/12 (2006.01)

Patent

CA 2535906

Aqueous dispersions comprising a mixture of: A) from 0.05% by weight to 10% by weight of salts of perfluoropolyether di-carboxylic derivatives having formula: T-O-R f-T (IA) wherein - T = -CF2-COOZ or -CF2CF2-COOZ wherein Z = Na, K, NH4, R1 (R2) (R3) N wherein R1= R2= alkyl or hydroxyalkyl, R3= H, alkyl or hydroxyalkyl, - R f is a (per)fluoropolyoxyalkylene chain having number average molecular weight between 500 and 10,000. B) from 0.0l% to 55 by weight of water-dispersible or water- soluble cationic polymers, having a charge density, defined as number of equivalents per weight unit of dry polymer, higher than 1 meq/g of dry polymer.

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