Patent ID: 6884512

Claim:
An article superior in making a waterdrop slip down a surface of the article, the article comprising: a substrate; and a functional film formed on a surface of the substrate, the functional film comprising: (a) a silica forming a matrix of the functional film; (b) a silylated-terminal dimethyl silicone represented by the general formula [A], the dimethyl silicone being in an amount of from 0.1 wt % to 10 wt %, based on a total weight of the silica; and (c) a fluoroalkylsilane represented by the general formula [B], where each of A 1 and A 2 is independently a bivalent hydrocarbon group, —(CH 2 ) i —NH—COO— group, where i is an integer of from 0 to 9, or oxygen; n is an interger of 2,000 or less and represents an average degree of polymerization; each of p and q is independently an integer of from 0 to 3; a total of p and q is 3 or greater; and each of terminal oxygens is independently bonded to a unit that is different from the dimethyl silicone or to another unit that is identical with the dimethyl silicone, B(CF 2 ) r CH 2 CH 2 Si(CH 3 ) 3-s (O s [B] where B represents —CF 3 group or —CH 2 CH 2 Si(CH 3 ) 3-t (O—) t group, where t is an integer of from 1 to 3; r is an integer of from 0 to 12; s is an integer of from 1 to 3; and a terminal oxygen is bonded to a unit that is different from the fluoroalkylsilane or to another unit that is identical with the fluoroalkylsilane, wherein the fluoroalkylsilane is in an amount of from 3 wt % to 20 wt % based on the total weight of the silica.