Patent ID: 11874534
Assignee: CARL ZEISS VISION INTERNATIONAL GMBH
Field: Optics (Instruments)
Classification: CPC G  B | IPC G

Claim 7:
8. The spectacle lens as claimed in claim 1, wherein the composition for production of the hardcoat layer 1 and the composition for production of the hardcoat layer 2 comprise:
a) at least one silane derivative of the formula R1R23-nSi(OR3)n where R1 is an unsubstituted or substituted alkyl group, cycloalkyl group, acyl group, alkyleneacyl group, aryl group or alkylenearyl group, R2 is an organic radical comprising an epoxy group, R3 is an unsubstituted or substituted alkyl group, cycloalkyl group, aryl group or alkylenearyl group and n=2 or 3, and/or a hydrolysis product and/or a condensation product of the silane derivative of the formula R1R23-nSi(OR3)n;
b) at least one colloidal inorganic oxide, hydroxide, oxide hydrate, fluoride, and oxyfluoride, or a mixture thereof;
c) at least one epoxy compound having at least two epoxy groups; and
d) at least one catalyst system including at least one Lewis acid and at least one thermolatent Lewis acid-base adduct.