| 摘要 |
Optical article comprising: (a) a transparent optical polymer substrate, (b) a transparent intermediate abrasion - resistant coating obtained from at least one epoxysilane by a sol -gel process, and (c) a transparent outer coating comprising a polythiol - ene matrix obtained by curing a liquid monomer mixture comprising at least one polyfunctional thiol and at least one polyfunctional allyl monomer, said cured polythiol - ene matrix having a glass transition temperature comprised in the range from 40°C to 70°C and a thickness from 3.5 µm to less than 10 µm. It is also drawn to a method for preparing such an optical article and to a method for repairing scratches in such an optical article by heating.
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