| abstract |
An optical component having an anti-fog coating obtainable by covalent attachment of a silane R o X m SiA n to the surface of the optical component, whereinn m=1-3, n=1-2 and o=0-1, with the proviso that m+n+o=4; X is halogen or C 1-4 -alkoxy, and for m=2 or 3 the individual radicals X may be identical or different, R is C 1-4 -alkyl, A has the structure -A1-A2, in which -A1-is a hydrophobic group bonded to Si, and -A2 represents a terminal hydrophilic group bonded to A1, -A1-is selected from -arylene-; —C 1-6 -alkylene-arylene-; -arylene—C 1-6 -alkylene-; —C 1-6 -alkylene-arylene—C 1-6 -alkylene-; -poly(C 3-6 -alkoxylene)-, fluorinated or perfluormated -alkylene-, fluorinated or perfluormated -poly(C 2-6 -alkoxylene)-, or a combination thereof, and -A2 is poly(meth)acrylate, and for n=2 the individual radicals A may be identical or different, and where -A2 comprises monomer units selected from CH 2 ═C(CH 3 )COOC 1-4 -alkyl, CH 2 ═C(H)COOC 1-4 -alkyl hydroxyethylene methacrylate, 2-acrylamido-2-methylpropanesulphonic acid, trimethylolpropane triacrylate and pentaerythritol tetraacrylate or mixtures thereof. |