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1. (US20120212840) Curable photochromic compositions and optical articles prepared therefrom

Office : United States of America
Application Number: 13293255 Application Date: 10.11.2011
Publication Number: 20120212840 Publication Date: 23.08.2012
Grant Number: 08608988 Grant Date: 17.12.2013
Publication Kind : B2
IPC:
G02B 5/23
G02B 13/00
G02B 3/00
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5
Optical elements other than lenses
20
Filters
22
Absorbing filters
23
Photochromic filters
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13
Optical objectives specially designed for the purposes specified below
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
3
Simple or compound lenses
Applicants: Bowles Steven E.
Transitions Optical, Inc.
Kutchko Cynthia
Lamers Paul H.
Lewis Jason R.
Sartori David E.
Walters Robert W.
Wang Feng
Inventors: Bowles Steven E.
Kutchko Cynthia
Lamers Paul H.
Lewis Jason R.
Sartori David E.
Walters Robert W.
Wang Feng
Agents: Altman Deborah M.
Priority Data:
Title: (EN) Curable photochromic compositions and optical articles prepared therefrom
Abstract:
(EN)

The present invention provides a curable, organic polymeric photochromic composition comprising: a photochromic amount of at least one photochromic material; a polymeric polyol having carbonate groups along its backbone and having a number average molecular weight greater than 5000 g/mole; and a curing agent having reactive functional groups capable of reacting with hydroxyl groups on the polymeric polyol. After curing and after the Photochromic Performance Test the composition demonstrates a T1/2 fade rate of less than 200 seconds.

Also provided is a photochromic article comprising a rigid substrate and a photochromic organic polymeric coating applied to a surface of the substrate. The photochromic organic polymeric coating comprises the composition described above.