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

Claim 38:
39. The spectacle lens as claimed in claim 32, wherein the composition for production of the at least one hardcoat layer comprises
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/or oxyfluoride,
c) at least one epoxy compound having at least two epoxy groups and
d) at least one catalyst system comprising at least one Lewis acid and at least one thermolatent Lewis acid-base adduct.