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US4631328A
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Polymers containing mesogenic groups and dye radicals in the side chains
Assignee: BASF SE
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Filing: 1984-12-26
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Granted: 1986-12-23
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Expires: 2004-12-26
Abstract
Abstract The polymer chain comprises (a) one or more monomers possessing a nematogenic, chiral or smectogenic group, or a mixture of monomers possessing a nematogenic group with those possessing a chiral group, and (b) one or more monomers possessing a radical of a pleochroic dye, and the nematogenic, the chiral and the smectogenic groups are bonded to the polymerizable group either directly or, like the dye radicals, via a spacer. The polymers can be used, together with low molecular weight liquid crystals or liquid crystal mixtures, in electrooptical displays.
Inventors
- 👤 Helmut Ringsdorf
- 👤 Michael Portugall
- 👤 Hans W. Schmidt
- 👤 Karl H. Etzbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:11
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C08; C08F; C08F246/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
194 words
A polymer, wherein the polymer chain comprises monomers of the formula: ##STR25## wherein R 1 is hydrogen or methyl, X is --O-- or --N--R 4 ; R is a linear or branched C 2 -C 12 -alkylene group which is uninterrupted or interrupted by one or more of the groups --O--, --S-- or --N--R 4 ; R 2 is a radical of the formula: ##STR26## where Y is ##STR27## and Z is a chemical bond or ##STR28## R 5 is hydrogen, C 1 -C 12 -alkyl, C 5 -C 7 -cycloalkyl, C 1 -C 12 -alkoxy, C 1 -C 12 -alkoxycarbonyl, C 2 -C 12 -alkanoyloxy, fluorine, chlorine, bromine, cyano or nitro, and R 6 is hydrogen, C 1 -C 12 -alkyl, C 1 -C 12 -alkoxy or C 1 -C 12 -alkoxycarbonyl; R 3 is the radical of a pleochroic dye comprising anthraquinone, stilbene, monoazo, bisazo and trisazo dyes, which is bonded to R via ##STR29## or an imide group; and R 4 is hydrogen or unsubstituted or substituted C 1 -C 4 -alkyl, and which contains from 0.1 to 40% by weight, based on the polymer, of the R 3 dye radicals.
Claim 2
Dependent Claim
194 words
A polymer, wherein the polymer chain comprises monomers of the formula: ##STR25## wherein R 1 is hydrogen or methyl, X is --O-- or --N--R 4 ; R is a linear or branched C 2 -C 12 -alkylene group which is uninterrupted or interrupted by one or more of the groups --O--, --S-- or --N--R 4 ; R 2 is a radical of the formula: ##STR26## where Y is ##STR27## and Z is a chemical bond or ##STR28## R 5 is hydrogen, C 1 -C 12 -alkyl, C 5 -C 7 -cycloalkyl, C 1 -C 12 -alkoxy, C 1 -C 12 -alkoxycarbonyl, C 2 -C 12 -alkanoyloxy, fluorine, chlorine, bromine, cyano or nitro, and R 6 is hydrogen, C 1 -C 12 -alkyl, C 1 -C 12 -alkoxy or C 1 -C 12 -alkoxycarbonyl; R 3 is the radical of a pleochroic dye comprising anthraquinone, stilbene, monoazo, bisazo and trisazo dyes, which is bonded to R via ##STR29## or an imide group; and R 4 is hydrogen or unsubstituted or substituted C 1 -C 4 -alkyl, and which contains from 0.1 to 40% by weight, based on the polymer, of the R 3 dye radicals.
Claim 3
Dependent Claim
70 words
The polymer as claimed in claim 1, wherein X is --O--, R is a linear or branched C 2 -C 12 -alkylene, --(CH 2 ) 2 --O--(CH 2 ) 2 --, ##STR30## or --S--, Z is a chemical bond, ##STR31## R 3 is a radical from an anthraquinone, monoazo, bisazo or trisazo dye which is bonded to R via --O--, ##STR32## or --S-- and R 4 is hydrogen or methyl.
Claim 4
Dependent Claim
17 words
The polymer as claimed in claim 1, wherein on the polymer, of the R 3 dye radicals.
Claim 5
Dependent Claim
52 words
The polymer as claimed in claim 1, wherein R is --(CH 2 ) 2 --, --(CH 2 ) 3 --, --(CH 2 ) 4 --, --(CH 2 ) 5 --, --(CH 2 ) 6 --, --(CH 2 ) 8 --, --(CH 2 ) 10 --, --(CH 2 ) 12 -- or ##STR33##
Claim 6
Dependent Claim
16 words
The polymer as claimed in claim 1, wherein R 2 is trans, trans-4'-methoxybicyclohexyloxy, 4'-methoxyphenylcyclohexyloxy or ##STR34##
Claim 7
Dependent Claim
21 words
The polymer as claimed in claim 1, wherein R 3 is ##STR35## and R 8 is hydrogen, n-butyl, tert.-butyl or 4'-n-butylcyclohexyl.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
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