Anti-reflective coating
There is provided a curable composition for forming an anti-reflective film. The composition includes: (a) hollow silica nanoparticles; (b) a siloxane binder having reactive groups; (c) at least one additional material having reactive groups; (d) an initiator; and (e) solvent. The siloxane binder is present in an amount that is at least 50% by weight of the total weight of (siloxane binder+additional materials having reactive groups). The weight ratio of hollow silica nanoparticles to the total of (siloxane binder+additional materials having reactive groups) is no greater than 1.75 to 1.
1. A curable composition for forming an anti-reflective film, said composition comprising:
(a) hollow silica nanoparticles;
(b) a siloxane binder having reactive groups;
(c) at least one additional material having reactive groups;
(d) an initiator; and
(e) solvent;
wherein:
(i) the siloxane binder is present in an amount that is 50% to 90% by weight of the total weight of the siloxane binder and the additional materials having reactive groups; and
(ii) a weight ratio of the hollow silica nanoparticles to the total of the siloxane binder and the additional materials having reactive groups is 0.82 to 1.44;
wherein the additional material (c) comprises an oligomer selected from the group consisting of (meth)acrylate oligomers, urethane-modified (meth)acrylate oligomers, polyester (meth)acrylate oligomers, epoxide (meth)acrylate oligomers, ether (meth)acrylate oligomers, and mixtures thereof.
2. The curable composition of claim 1 , wherein the siloxane binder (b) is selected from the group consisting of siloxane polymers, silsesquioxanes, and combinations thereof.
3. The curable composition of claim 1 , wherein the additional material (c) further comprises a fluorinated surfactant.
4. The curable composition of claim 1 , wherein the initiator (d) is selected from the group consisting of photoinitiators, thermal initiators, and combinations thereof.
5. The curable composition of claim 1 , wherein the siloxane binder is present in an amount that is 60% to 90% by weight of the total weight of the siloxane binder and the additional materials having reactive groups.
6. An anti-reflective film made by the process of:
(1) coating the curable composition of claim 1 onto a substrate to form an uncured film;
(2) drying the uncured film to form a dried uncured film; and
(3) exposing the dried uncured film to one or both of UV radiation and heat to form the anti-reflective film.
7. The anti-reflective film of claim 6 , wherein the dried uncured film is exposed in sequence to UV radiation and heat.
8. An electronic device having thereon the anti-reflective film of claim 6 .