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US 12,521,966 B2Granted
2K pu-dual cure adhesive for lamination
AssigneeEssilor International
InventorRonald A. Berzon
Life of this patent
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Abstract
Disclosed herein are a two-component polyurethane adhesive and a dual cure polyurethane-based adhesive for use in laminated films. The adhesives are particularly useful for producing photochromic and clear-to-polarized laminates for ophthalmic lens applications.
Claims10
A functionalized optical article comprising:
- an optical lens comprising at least one polymerized monomer or thermoplastic material;
- a functional multilayer laminate comprising a functional film, a first thermoplastic film positioned on one side of the functional film, and a second thermoplastic film positioned on the opposite side of the functional film;
- and
- a laminating adhesive disposed between the functional film and each of the first and second thermoplastic films, wherein the laminating adhesive comprises an interlocking interpenetrating network comprising two distinct crosslinked polymer networks;
- said laminating adhesive comprising, prior to curing:
- thermally curable components including at least one polyisocyanate and at least one polyol;
- at least one photopolymerization initiator;
- and
- UV radiation-curable components including at least one aliphatic urethane acrylate and at least one acrylate monomer;
- wherein the laminating adhesive optionally comprises a polyurethane forming catalyst.
7 more elements
Dependencies are inferred from the claim text.