METHOD OF IMPARTING OIL- AND WATER-REPELLING PROPERTIES ON SURFACES OF POROUS CERAMIC MATERIALS, PHOSPHORUS MONOESTERS AND METHOD OF PREPARATION THEREOF Russian patent published in 1999 - IPC

FIELD: household chemical goods. SUBSTANCE: method is accomplished by applying 0.1-5 wt % solution of a phosphorus monoester onto ceramic surface, said monoester having general formula I: [R_f-O-CFy-L-O] = PO(O^-Z⁺)_3-m′ (I) where L is bivalent organic group selected from (i) -CH₂-(OCH₂-CH₂-)_n- where n is integer from 0 to 3; (ii) -CO-NR′-(CH₂)_q where R' is hydrogen atom or C₁-C₄-alkyl and q is integer from 1 to 4; m=1; Y is fluorine or trifluoromethyl; Z is hydrogen atom, alkali metal, or N(R)+4

where R, the same of different, hydrogen atom or C₁-C₆-alkyl; and R_f is a polyperfluoroalkylen oxide chain. Methods for preparing phosphorus monoesters are also described. EFFECT: improved oil- and water-repelling properties. 9 cl, 3 tbl, 27 ex