AQUEOUS COMPOSITIONS FOR OIL-REPELLENT TREATMENT OF PAPER, CONTAINING SALTS OF PERFLUOROPOLYESTERS OF DICARBOXYLIC ACIDS Russian patent published in 2010 - IPC C08L27/12 C08J3/03 D21H17/53 D21H21/14 D21H27/10 

FIELD: chemistry.

SUBSTANCE: aqueous dispersion contains A) 0.05-10 wt % salts of perfluoropolyester derivatives of dicarboxylic acids of formula T-O-R_t-T, where T = -CF₂-COOZ or -CF₂CF₂-COOZ, Z - Na, K, NH₄, R₁(R₂)(R₃)N, R₁=R₂=alkyl or hydroxyalkyl, R₃ = H, alkyl or hydroxyalkyl, R_f denotes (per)fluoropolyoxyalkylene chain with number-average molecular weight of 500-10000, and B) 0.01-5 wt % water-dispersible or water-soluble cationogenic polymers with charge density in dry polymer greater than 1 mEq/g. The dispersion is obtained by dispersing 0.05-10 wt % component (A) in water. Cationogenic polymer (B) is slowly added to the obtained dispersion while stirring until achieving weight ratio of (A) to (B) of 1:1-5:1.

EFFECT: dispersions which endow paper with improved oil-repellent properties against compounds with high content of fat or fatty acids.

14 cl, 16 tbl, 17 ex