Lens or semi-finished blank comprising photochromic resin compos

Details Lens or semi-finished blank comprising photochromic resin compos Lens or semi-finished blank comprising photochromic resin compos

1996-12-05

1999-06-22

Le, H. Thi

Stock material or miscellaneous articles

Structurally defined web or sheet

Nonplanar uniform thickness material

359321, 359642, 428333, 428355AC, B32B 516, B32B 700, G02B 300

Patent

active

059141743

ABSTRACT:
A resin is provided comprising a mixture of at least two polymerizable components, at least one photochromic additive, at least one additive and at least one polymerization initiator. The mixture of at least two polymerizable components is preferably selected from monofunctional, difunctional and multifunctional acrylates and methacrylates. The photochromic additive is preferably selected from spirooxazine additives and spiropyran additives. And the additive is preferably selected from antioxidants, radical scavengers and ultraviolet absorbers.

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