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US 2015/0309209 A1Published application
Photochromic Polyrethane Laminate
AssigneeInsight Equity A.P.X., L.P. (dba Vision-Ease Lens)
InventorsPing Fan, Hannah Vu
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Abstract
Photochromic polyurethane laminates and methods for the formation of same wherein the photochromic polyurethane layer of the laminate has been crosslinked with a isocyanate-active prepolymer using a crosslinking agent. The crosslinking agent is formulated to have at least three functional groups that are reactive with functional groups of the polyurethane or of the isocyanate-active prepolymer.
Claims11
A photochromic polyurethane laminate for use in an optical article comprising:
- a first resin sheet;
- a second resin sheet;
- a photochromic polyurethane layer disposed between said first and second resin sheet;
- said photochromic polyurethane layer formed from a composition comprising a prepolymer, di(trimethylolpropane), and one or more photochromic compounds;
- said prepolymer formed from a composition comprising:
- a polycarbonate polyol;
- an aliphatic diisocyanate.
4 more elements
A photochromic polyurethane laminate for use in an optical article comprising:
- a first resin sheet;
- a second resin sheet;
- a photochromic polyurethane layer disposed between said first and second resin sheet;
- said photochromic polyurethane layer formed from a composition comprising a prepolymer, di(trimethylolpropane), and one or more photochromic compounds;
- said prepolymer formed from a composition comprising:
- a polycarbonate polyol;
- a polyether polyol;
- an aliphatic diisocyanate.
5 more elements
Dependencies are inferred from the claim text.