Patent ID: 8664310

Claim:
A mixture for use in forming a transparent coating on a transparent substrate material, the mixture comprising: a silicon alkoxide precursor having a pH level between 1 and 4; and an organic polymer selected from the group consisting of polyethylene glycol, polypropylene glycol, copolymers of polyethylene glycol and polypropylene glycol, polyvinyl pyrrolidone, polyether, alkyl-, cycloalkyl- and/or aryl-substituted polyether, polyester, alkyl-, cycloalkyl- and/or aryl-substituted polyester or mixtures thereof, the organic polymer having an average molecular weight between 5,000 and 50,000 Da; wherein the organic polymer makes up between 35 to 65% of the mixture by volume; the organic polymer operable to be removed from the mixture after application to the transparent substrate material leaving a resultant transparent coating; wherein the resultant coating has a porosity of ≧35% to ≦65%; wherein the resultant coating has a thickness in the range from ≧95 nm to ≦135 nm; wherein the resultant coating includes pores having an average diameter from ≧5 nm to ≦50 nm; and wherein the pores have a diameter distribution according to a log-norm distribution with a half-width of ≦10 nm.