Method of reducing the adhesion forces between hard surfaces and dirt that appears subsequently

摘要

A method for reducing the adhesion forces between a hard surface made of a ceramic material, a metal, a glass or a plastic material and dirt that appears subsequently, the method being characterized by comprising the step of treating the hard surface with a liquid composition comprising one or more copolymer (s) a comprising (n) a2) from 1 to 50% by weight of one or more recurring structural units of the formula (2) ** ** formula wherein R3 R4 and R5 are, independently of one another, hydrogen or methyl, R6 is hydrogen or a hydrocarbyl radical (C1-C30) n-aliphatic, isoalifático, olefinic, cycloaliphatic, arylaliphatic or aromatic, Y is O or NH m and n are the stoichiometric coefficients related units of ethylene oxide (EO) and propylene oxide (PO) and are, independently of one another, from 0 to 50, wherein the sum of m and n should average = 1 and distribution units EO and PO to lar go chain - [EO] m [PO] n may be random, blocklike, alternating or gradient, and b) 49.99 to 98.99% by weight of one or more of the repeating structural units of formula (3) ** formula ** wherein R3 is hydrogen or methyl, Z is alkylene of (C1-C8) and X is selected from the group consisting of H +, Li +, Na +, K + , Mg ++ / 2, Ca ++ / 2, Al +++ / 3, NH 4 +, monoalkylammonium, dialkylammonium, trialkylammonium and tetraalkylammonium, wherein the alkyl groups present in these ammonium ions comprise, independently of one another, from 1 to 30 carbon atoms.