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US 11,434,401 B2Granted
Optical adhesive for glass and polycarbonate
AssigneeEssilor International
InventorRobert Valeri
Life of this patent
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Abstract
Disclosed are UV curable adhesive compositions and methods to adhere polycarbonate substrates containing UV absorbers to glass for use in ophthalmic lenses.
Claims15
A photocurable adhesive, comprising:
- a) at least one urethane acrylate oligomer, in an amount ranging from 50 to 75 wt. %;
- b) at least one alkyl acrylate or diacrylate monomer, in an amount ranging from 10 to 25 wt. %;
- c) at least one hydroxy-functional acrylic monomer, in an amount ranging from 8 to 25 wt. %;
- and
- d) at least one free-radical generating initiator, in an amount ranging from 5 to 9.5 wt %.
2 more elements
Dependencies are inferred from the claim text.