| abstract |
Fluorine-containing calcium composite particles comprising an aggregate of a fluorine-containing alcohol represented by the general formula: nC n F 2n+1 (CH 2 CF 2 ) a (CF 2 CF 2 ) b (CH 2 CH 2 ) c OH nwherein n is an integer of 1 to 6, a is an integer of 1 to 4, b is an integer of 0 to 3, and c is an integer of 1 to 3; and a calcium compound, nor fluorine-containing calcium composite particles comprising a condensate of a fluorine-containing alcohol represented by the general formula: R F -A-OH or the general formula: HO-A-R F '-A-OH wherein R F is a liner or branched perfluoroalkyl group that may contain an O, S, or N atom, or a polyfluoroalkyl group in which some of the fluorine atoms of the perfluoroalkyl group are replaced by hydrogen atoms; R F ' is a linear or branched perfluoroalkylene group containing an O, S, or N atom; and A is an alkylene group having 1 to 6 carbon atoms; alkoxysilane, and a calcium compound. The latter fluorine-containing calcium composite particles are used as an active ingredient of water- and oil-repellent. |