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US5000878A
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Photochromic articles with thermally stable photocolorability
Assignee: American Optical Corp
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Filing: 1989-02-24
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Granted: 1991-03-19
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Expires: 2009-02-24
Abstract
Abstract Spirooxazine compounds are incorporated into a plastic host comprised of copolymers of poly(vinyl alcohol) and poly(vinyl acetate). This combination results in a photochromic composite which exhibits significantly improved temperature stability relative to the prior art.
Inventors
- 👤 Nori Y. C. Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:38
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/685
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
87 words
A photochromic article, comprising: a plastic host, said plastic host consisting essentially of a copolymer of poly (vinyl alcohol) and poly (vinyl acetate); and a photochromic compound incorporated into the plastic host, said photochromic compound having a structural formula according to: ##STR8## where: R 1 , R 2 and R 3 are each independently lower alkyl cycloalkyl, lower alkoxy or aryl; A and B are each independently unsubstituted aromatic, unsubstituted heterocyclic, substituted aromatic or substituted heterocyclic; said photochromic article exhibiting improved temperature stability with regard to photocolorability.
Claim 2
Dependent Claim
87 words
A photochromic article, comprising: a plastic host, said plastic host consisting essentially of a copolymer of poly (vinyl alcohol) and poly (vinyl acetate); and a photochromic compound incorporated into the plastic host, said photochromic compound having a structural formula according to: ##STR8## where: R 1 , R 2 and R 3 are each independently lower alkyl cycloalkyl, lower alkoxy or aryl; A and B are each independently unsubstituted aromatic, unsubstituted heterocyclic, substituted aromatic or substituted heterocyclic; said photochromic article exhibiting improved temperature stability with regard to photocolorability.
Claim 3
Dependent Claim
71 words
A photochromic article, comprising: a plastic host, said plastic host consisting essentially of a copolymer of poly(vinyl alcohol) and poly(vinyl acetate); and a photochromic spirooxazine compound incorporated into the plastic host, said photochromic spirooxazine compound having a structural formula according to: ##STR9## wherein: R 4 , R 5 and R 6 are each independently hydride, halo, alkyl, cycloalkyl, alkoxyl, cyano, amino, phenyl or trifluoromethyl and l, m and n are integers.
Claim 4
Dependent Claim
71 words
A photochromic article, comprising: a plastic host, said plastic host consisting essentially of a copolymer of poly(vinyl alcohol) and poly(vinyl acetate); and a photochromic spirooxazine compound incorporated into the plastic host, said photochromic spirooxazine compound having a structural formula according to: ##STR9## wherein: R 4 , R 5 and R 6 are each independently hydride, halo, alkyl, cycloalkyl, alkoxyl, cyano, amino, phenyl or trifluoromethyl and l, m and n are integers.
Claim 5
Dependent Claim
54 words
A composite according to claim 1 wherein said photochromic compound comprises a spiro[indoline-2,2'-[2H]-naphth[1,2-b][1,4] oxazine having the structural formula: ##STR10## where R m 4 , R n 5 , and R l 6 each represent independently a hydrogen, halogen, alkyl, cycloalkyl, alkoxy, cyano, amino phenyl, or trifluoromethyl group and m, n and l are integers.
Claim 6
Dependent Claim
53 words
A composite according to claim 1 wherein said photochromic compound comprises a spiro[indoline-anthr[1,4] oxazine having the structural formula: ##STR11## where R m 5 , R n 6 and R k 7 each represent independently a hydrogen, halogen, alkyl, cycloalkyl, alkoxy, cyano, amino, phenyl, or trifluoromethyl group and m, n and l are integers.
Claim 7
Dependent Claim
55 words
A composite according to claim 1 wherein said photochromic compound comprises a spiro[indoline-2,2'-[2H] phenathro[9,10-b][1,4] oxazine having the structural formula: ##STR12## where R m 4 , R n 5 , and R l 6 reach represent independently a hydrogen, halogen, alkyl, cycloalkyl, alkoxy, cyano, amino, phenyl, or trifluoromethyl group and m, n and l are integers.
Claim 8
Dependent Claim
45 words
A composite according to claim 1 wherein said photochromic compound comprises a spiro[piperidine-2,3'-[3H]naphth[2,1-b][1,4] oxazine having the structural formula: ##STR13## where R l 4 represents independently a hydrogen, halogen, alkyl, cycloalkyl, alkoxy, carboalkyl, cyano, amino, phenyl or trifluoromethyl group and m, n and l are integers.
Claim 9
Dependent Claim
53 words
A composite according to claim 1 wherein said photochromic compound comprises a spiro[indoline-2,3'-[3H]pyrido[3,2-f][1,4] benzoxazine having the structural formula: ##STR14## where R m 4 , R n 5 , R l 6 each represent independently a hydrogen, halogen, alkyl, cycloalkyl, alkoxy, cyano, amino, phenyl, or trifluoromethyl group and m, n and l are integers.
References Cited (Backward Citations)
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