Patent US4990649A successfully refreshed from Google Patents.
US4990649A
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Azulenesquaric acid dyes that contain urethane groups
Assignee: BASF SE
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Filing: 1989-05-02
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Granted: 1991-02-05
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Expires: 2009-05-02
Abstract
Abstract Azulenesquaric acid dyes of the formula ##STR1## where L is substituted or unsubstituted C 1 -C 12 -alkylene, R 1 is C 1 -C 20 -alkyl, C 5 -C 7 -cycloalkyl or substituted or unsubstituted phenyl and R 2 , R 3 , R 4 and R 5 are each independently of the others hydrogen or substituted or unsubstituted C 1 -C 12 -alkyl, with the proviso that when R 5 is hydrogen the positions of the substituents CH 2 --L--O--CO--NHR 1 and R 4 on an azulene ring may also be interchanged within a ring in either or both of the azulene rings, derived from azulene intermediates that contain urethane groups, are suitable for use in an optical recording medium.
Inventors
- 👤 Wolfgang Schrott
- 👤 Peter Neumann
- 👤 Michael Schmitt
- 👤 Sibylle Brosius
- 👤 Klaus D. Schomann
- 👤 Harald Kuppelhamier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:41
CPC Classifications
G; G03; G03C; G03C7/00; C; C09; C09B; C09B57/00; C09B57/007; C07; C07C; C07C271/00; C07C271/06; C07C271/08; C07C271/10; C07C271/12; C07C271/24; C07C2601/00; C07C2601/04; C07C2601/12; C07C2601/14; C07C2602/00; C07C2602/02; C07C2602/14; C07C2602/26; C07C2602/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
An azulenesquaric acid dye having the formula: ##STR39## where L is C 1 -C 12 -alkylene or C 1 -C 12 -alkylene substituted by phenyl, R 1 is C 1 -C 20 -alkyl, C 5 -C 7 -cycloalkyl, phenyl or phenyl substituted by C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or halogen, R 2 , R 3 , R 4 and R 5 are identical or different and are each independently of the others hydrogen or C 1 -C 12 -alkyl, C 1 -C 12 alkyl, substituted by halogen, C 1 -C 4 -alkoxy, phenyl, phenyl substituted by C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or halogen, C 1 -C 12 -alkoxycarbonyl or cyano, with the proviso that when R 5 is hydrogen the positions of the substituents CH 2 --L--O--CO--NHR 1 and R 4 on an azulene ring also are within a ring in either or both of the azulene rings.
Claim 2
Dependent Claim
158 words
An azulenesquaric acid dye having the formula: ##STR39## where L is C 1 -C 12 -alkylene or C 1 -C 12 -alkylene substituted by phenyl, R 1 is C 1 -C 20 -alkyl, C 5 -C 7 -cycloalkyl, phenyl or phenyl substituted by C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or halogen, R 2 , R 3 , R 4 and R 5 are identical or different and are each independently of the others hydrogen or C 1 -C 12 -alkyl, C 1 -C 12 alkyl, substituted by halogen, C 1 -C 4 -alkoxy, phenyl, phenyl substituted by C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or halogen, C 1 -C 12 -alkoxycarbonyl or cyano, with the proviso that when R 5 is hydrogen the positions of the substituents CH 2 --L--O--CO--NHR 1 and R 4 on an azulene ring also are within a ring in either or both of the azulene rings.
Claim 3
Dependent Claim
28 words
An azulenesquaric acid dye as claimed in claim 1, wherein R 2 , R 3 , R 4 and R 5 are each C 1 -C 6 -alkyl.
Claim 4
Dependent Claim
27 words
An azulenesquaric acid dye as claimed in claim 1, wherein R 2 and R 4 are each methyl and R 3 and R 5 are each hydrogen.
Claim 5
Dependent Claim
27 words
An azulenesquaric acid dye as claimed in claim 1, wherein R 2 and R 4 are each hydrogen, R 3 is isopropyl and R 5 is methyl.
References Cited (Backward Citations)
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