Adhesion primer for laminate in cast lenses

Patent metadata

Field	Value
Publication number	US-11378720-B2
Application number	US-201616331425-A
Country	US
Kind code	B2
Filing date	Sep 19, 2016
Priority date	Sep 19, 2016
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

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.

First claim

The invention claimed is:

1. 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.

2. The ophthalmic lens of claim 1 , wherein the acrylic resin has a molecular weight ranging from about 10,000 to about 100,000 g/mol.

3. The ophthalmic lens of claim 1 , wherein the urethane acrylate oligomer comprises an ethylenically unsaturated monomer having a degree of unsaturation of 1 or more.

4. The ophthalmic lens of claim 3 , wherein the urethane acrylate oligomer comprises an ethylenically unsaturated monomer having a degree of unsaturation of 2.

5. The ophthalmic lens of claim 1 , wherein the functional laminate is a polarizing laminate.

Assignees

• Essilor Int

Inventors

• Berzon Ronald A

Classifications

• B29D11/0073

  Optical laminates · CPC title

• B32B2307/42

  Polarizing, birefringent, filtering · CPC title

• B32B2255/10

  on synthetic resin layer or on natural or synthetic rubber layer · CPC title

• B32B23/08

  of synthetic resin · CPC title

• B29D11/00644

  polarizing · CPC title