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US 11,378,720 B2Granted
Adhesion primer for laminate in cast lenses
AssigneeEssilor International
InventorRonald A. Berzon
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Abstract
Embodiments of the disclosure relate to a primer composition for increasing the adhesion of a polarizing film laminate to a cast-polymerized lens. The primer includes an acrylic polymer, polyurethane acrylate oligomer, a solvent, a UV curing agent, and a monomer which promotes adhesion to a cast-polymerized lens.
Claims5
An ophthalmic lens comprising:
- a cast-polymerized lens comprising at least one polymer formed from allyl diglycol carbonate,
- a functional laminate comprising a thermoplastic film layer attached to both sides of a functional layer wherein the functional laminate is a triacetyl cellulose (TAC)-polyvinyl alcohol (PVA)-TAC laminate,
- a primer coating deposited onto both external surfaces of the functional laminate,
- wherein said primer coating comprises:
- 33.3% of a base primer comprising:
- 10-23% of an acrylic resin,
- 10-23% of a UV-curable urethane acrylate oligomer,
- 65-66% of methyl isobutyl ketone, and
- 1-2% of a photoinitiator;
- 64.7% of an additional solvent chosen from ethyl acetate, cyclopentanone, and cyclohexanone;
- and
- 2.0% of allyl diglycol carbonate.
9 more elements
Dependencies are inferred from the claim text.