Composition for coating film to prevent conspicuous fingerprints, coating film to prevent conspicuous fingerprints using the composition, and article having the coating film
A coating film to prevent a conspicuous fingerprint has a water contact angle of no less than 60° so that most of water contained in fingerprints on the coating film evaporates without forming a layer adsorbed on the coating film. Further, the coating film has lipophilicity and has a diiodomethane contact angle of no more than 45° so that the coating film exhibits enhanced affinity to fingerprints, which primarily contain oily components.
1. A coating film for preventing a conspicuous fingerprint, comprising a compound represented by the following Formula 1, the coating film having a water contact angle of no less than 60° and a diiodomethane contact angle of no more than 45°:
[R 1 O—(CH 2 CH 2 O) n ] r —[R 2 —(CH 2 ) l ] m —SiX p Y q Formula 1
where R 1 represents hydrogen or a C 1 -C 3 substituted or unsubstituted alkyl group;
n is an integer of 1 to 12;
r is 0 or 1;
when r is 0, R 2 represents a C 5 ˜C 20 substituted or unsubstituted alkyl group, a C 5 ˜C 20 substituted or unsubstituted alkenyl group, a C 5 ˜C 20 substituted or unsubstituted alkynyl group, a C 5 ˜C 20 substituted or unsubstituted aryl group, a C 6 ˜C 20 substituted or unsubstituted arylalkyl group, a C 5 ˜C 20 substituted or unsubstituted cyclic alkylene group, or an alkylene group including a hetero atom;
when r is 1, R 2 represents a C 5 ˜C 20 substituted or unsubstituted alkylene group, a C 5 ˜C 20 substituted or unsubstituted alkenylene group, a C 5 ˜C 20 substituted or unsubstituted alkynylene group, a C 5 ˜C 20 substituted or unsubstituted arylene group, a C 6 ˜C 20 substituted or unsubstituted arylalkylene group, a C 5 ˜C 20 substituted or unsubstituted cyclic alkylene group, or an alkylene group including a hetero atom;
X represents a C 1 ˜C 3 alkyl group;
Y represents a halogen atom, a C 1 ˜C 3 alkoxy group, or a hydroxyl group;
m is an integer of 1 to 3; p is an integer of 0 to 2; q is an integer of 1 to 3; and m+p+q is 4, wherein the compound represented by Formula 1 is at least one selected from the group consisting of methoxyethoxyundecyl-trimethoxysilane, methoxytriglycoloxyundecyltrimethoxysilane, 3-methoxyethoxy-4-acetoxy-cyclohexylethyl-trimethoxysilane, methoxyethoxyundecyltrichlorosilane, 16-(2-methoxy-ethoxy)hexadecyltrichlorosilane, (3-cyclopentadienylpropyl)triethoxysilane, dicyclopentyl-dimethoxysilane, cyclopentyltrichlorosilane, dicyclohexyldichlorosilane, [2-(3-cyclohexenyl)ethyl]trimethoxysilane, and derivatives thereof.
2. The coating film of claim 1 , wherein the compound represented by Formula 1 is a compound represented by the following Formula 2 or 3:
R 3 O—(CH 2 CH 2 O) n —R 4 —SiX p Y q Formula 2
where R 3 represents hydrogen or a C 1 ˜C 3 substituted or unsubstituted alkyl group;
n is an integer of 1 to 12;
R 4 represents a C 5 ˜C 20 substituted or unsubstituted alkylene group, a C 5 ˜C 20 substituted or unsubstituted alkenylene group, a C 5 ˜C 20 substituted or unsubstituted alkynylene group, a C 5 ˜C 20 substituted or unsubstituted arylene group, a C 6 ˜C 20 substituted or unsubstituted arylalkylene group, a C 5 ˜C 20 substituted or unsubstituted cyclic alkylene group, or an alkylene group including a hetero atom;
X represents a C 1 ˜C 3 alkyl group; Y represents a halogen atom or a C 1 ˜C 3 alkoxy or hydroxyl group;
p is 0, 1, or 2; and p+q is 3;
[R 5 —(CH 2 ) l ] m —SiY 4-m Formula 3
where R 5 represents a C 5 ˜C 20 substituted or unsubstituted cyclic alkyl group or a C 5 ˜C 20 substituted or unsubstituted cyclic alkenyl group;
m is an integer of 1 to 3; l is an integer of 0 to 6; and
Y represents a halogen atom or a C 1 ˜C 3 alkoxy or hydroxyl group.
3. The coating film of claim 1 , further comprising at least one lubricant selected from the group consisting of unsaturated fatty acids, saturated fatty acids, and hydrocarbon oils.
4. An article comprising the coating film for preventing a conspicuous fingerprint according to claim 1 on outermost surfaces thereof.
5. The article of claim 4 , wherein the article is a display, a touch panel, or an information terminal.