Anti-soiling treating agent

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.degree. 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.sub.2 --.sub.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.degree. to 150.degree. 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.sub.1 and R.sub.2 represent a hydrogen atom or an alkyl group having not more than 2 carbon atoms, R.sub.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.sub.3 are as defined above, R.sub.4, R.sub.5 and R.sub.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.sub.7 and a carbon atom in the main chain, R.sub.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.