Patent ID: 9534160
Date: 2017-01-03
CPC Classifications: B05D,C01B,C03C,C08G,C09D,C09K,G02B,G03B,Y10T

Claim:
1. An article comprising a substrate having a main surface coated with a mesoporous antistatic coating, said coating having a refractive index lower than or equal to 1.45, and a silica based matrix functionalized by ammonium groups, the matrix having a hydrophobic character, wherein said coating is obtained by: a) preparing a precursor sol of a mesoporous antistatic coating comprising: b) depositing the precursor sol to form a precursor sol film onto a main surface of the substrate; c) consolidating the deposited film; d) removing the pore-forming agent from the film resulting from the previous step; and e) recovering a mesoporous antistatic coating having a refractive index lower than or equal to 1.45; and further by: (i) treating the film after step b) or after step c), with at least one hydrophobic reactive compound carrying at least one hydrophobic group; and/or (ii) introducing at least one hydrophobic precursor agent carrying at least one hydrophobic group into the precursor sol before the step b) of depositing the precursor sol film.