Anti-soiling treating agent

Claim 1

An anti-soiling treating agent having a solids content of 0.001 to 70% comprising (a) a perfluoroalkyl-containing hybrid urethane compound (I) resulting from the addition reaction of two perfluoroalkyl-containing alcohols which have a difference in melting point of at least 20° C. and are selected from compounds of the following formula Rf--A--B--OH wherein Rf represents a linear or branched perfluoroalkyl group, A is the group --CH 2 -- l in which l is an integer of 0 to 5, the group ##STR12## in which R is a hydrogen atom, an alkyl group having not more than 12 carbon atoms or a substituted alkyl group, the group ##STR13## in which R is as defined above, a phenylene group, an ether linkage, or an ester linkage, and B represents an alkylene or aralkylene group having not more than 12 carbon atoms, or a derivative thereof containing an ether linkage, the mole ratio between the two alcohols being 33-67:67-33, with a polyisocyanate, said addition reaction being carried out at a temperature of 50° to 150° C. in the presence or absence of an orgainic solvent in an anhydrous condition while maintaining the equivalent ratio of the alcohol to the isocyanate at from 1:1.2 to 1.2:1, or (b) a composition comprising the perfluoroalkyl-containing hybrid urethane compound (I) and a fluorine-free vinyl polymer (II) having a Rockwell hardness of 90 to 130, the weight ratio of (I) to (II) being in the range of from 1:10 to 10:1, or (c) a composition comprising the perfluoroalkyl-containing hybrid urethane compound (I) and a perfluoroalkyl-containing vinyl polymer (III), said perfluoroalkyl-containing vinyl polymer (III) being represented by the general formula ##STR14## wherein Rf, A and B are as defined above, X represents a divalent bonding group such as ##STR15## R 1 and R 2 represent a hydrogen atom or an alkyl group having not more than 2 carbon atoms, R 3 represents Rf--A--B-- or an alkyl group having not more than 8 carbon atoms, and p is a number of 5 to 100 which shows the number of recurring monomeric units, or being represented by the general formula ##STR16## wherein Rf, A, B, X, and R 3 are as defined above, R 4 , R 5 and R 6 each represents a hydrogen atom, an alkyl group having not more than 8 carbon atoms, or a halogen atom other than fluorine, Y represents a divalent bonding group such as an ester, ether or an acid amide group or a direct bond between R 7 and a carbon atom in the main chain, R 7 represents a hydrogen atom, a halogen atom other than fluorine, a nitrile group, or an alkyl, alkenyl or aryl group having not more than 20 carbon atoms, and m and n independently represent a number of 5 to 100 which shows the number of recurring monomeric units, provided that m and n are selected such that the ratio of the two monomers to be copolymerized is in the range of from 3:97 to 90:10, wherein the weight ratio of the hybrid urethane compound (I) to the perfluoroalkyl-containing vinyl polymer (III) is in the range of from 1:10 to 10:1 or (d) a composition comprising the perfluoroalkyl-containing hybrid urethane compound (I), the perfluoroalkyl-containing vinyl polymer (III) and the fluorine-free vinyl polymer (II), wherein the weight ratio of the hybrid urethane compound (I) to the perfluoroalkyl-containing vinyl polymer (III) is in the range of from 1:10 to 10:1, and the weight ratio of the sum of (I) and (III) to the fluorine-free vinyl polymer (II) is in the range of from 1:10 to 10:1, and if desired, water and/or an organic solvent.