wherein A is an oligomer group comprising carbon and fluorine;

B is —(CH₂)x-, wherein x is an integer of 0 to 12;

D is carbon or silicon;

each of E1 to E3 is, independently from one another, H, —X1-[(CH₂)y-X2]z, or —(CH₂)y-X3, wherein at least one of E1 to E3 is not H;

y is an integer of 0 to 8;

z is an integer of 1 to 3;

X1 is oxygen, nitrogen, sulfur, carbon, or phosphorus; and

each of X2 and X3, independently from one another, includes a hydroxy group, a dimethyl monoalkoxysilane group, a monomethyldialkoxysilane group, a trialkoxysilane group, a silazane group, an amine group, an ethylene glycol group, a triethylene glycol group, a mercapto group, an ester group, an alkoxy group, a methacrylic group, an acrylic group, a carboxylic acid group, a cyclic amine group, an epoxy group, a fluorocarbon group, an azide group, a benzophenone group, or an isocyanate group,

wherein the compounds of Chemical Formula 1 comprise:

a first compound with a molecular weight of the group A of about 270 to about 930 in Chemical Formula 1,

a second compound with a molecular weight of the group A of about 1,800 to about 2,200 in Chemical Formula 1, and

a third compound with a molecular weight of the group A of about 3,600 to about 4,400 in Chemical Formula 1.