Scratch resistant antireflective coatings for synthetic resins
AssigneeRohm Co., Ltd.
InventorsHeinz-Juergen Hohage, Rolf Neeb
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Abstract
Scratch resistant and antireflective coatings for synthetic resins, said coatings having a refractive index differing from the value 1.45 by at least 0.01 unit and a thickness ranging from 1 to 40 microns and comprising (1) (a) an acrylate and/or methacrylate polymer, and/or (b) an organosilicon polymer, or (c) a melamine resin; and (2) from 0.1 to 10 weight percent of amorphous, porous silicic acid having a large pore volume from 0.1 to 5 ml/g and consisting of primary particles of an average diameter ranging from 1 to 50 microns; synthetic resin substrates having such a coating thereon; coating compositions for applying such a coating to a substrate; and methods for making such coatings.
Claims11
A scratch resistant antireflecting coating having a refractive index differing from the value 1.45 by at least 0.01, said coating comprising a matrix film, from 1 to 40 microns thick, of
- (1) (a) an acrylate and/or methacrylate polymer, and/or
- (b) an organosilicon polymer, or
- (c) a melamine resin;
- and, in said matrix film,
- (2) from 0.1 to 10 percent, by weight of the coating, of amorphous, porous silica having a large pore volume from 0.1 to 5 ml/g and consisting of primary particles having an average diameter from 1 to 50 microns, at least 40 percent of the silica primary particles having an average diameter at least 10 percent greater than the thickness of the matrix film.
Dependencies are inferred from the claim text.