US4913836A
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Side chain liquid crystalline polymers exhibiting nonlinear optical response
Assignee: Hoechst Celanese Chemical Co
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Filing: 1988-12-05
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Granted: 1990-04-03
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Expires: 2008-12-05
Abstract
Abstract This invention provides novel side chain liquid crystalline polymers. An invention polymer exhibits nonlinear optical response, and has utility as a transparent nonlinear optical component in optical light switch and light modulator devices. A present invention side chain liquid crystalline polymer is illustrated by the following arcylate structure with pendant mesogenic side chains: ##STR1##
Inventors
- 👤 Anthony J. East
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:45
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617; C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3861; C09K19/40; C09K19/406; C09K19/408
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
103 words
A thermotropic liquid crystalline polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR20## where P' is a polymer main chain unit selected from the group consisting of polyvinyl, polysiloxane, and polyoxyalkylene structures, m is an integer with a value of at least 5, S' is a flexible spacer group having a linear chain length of between about 2-20 atoms, X is an electron-donating substituent, and Y is an electron-withdrawing substituent; and where the recurring monomeric unit comprises at least about 50 weight percent of the polymer, and the polymer has a glass transition temperature between about 0°-120° C.
Claim 2
Dependent Claim
103 words
A thermotropic liquid crystalline polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR20## where P' is a polymer main chain unit selected from the group consisting of polyvinyl, polysiloxane, and polyoxyalkylene structures, m is an integer with a value of at least 5, S' is a flexible spacer group having a linear chain length of between about 2-20 atoms, X is an electron-donating substituent, and Y is an electron-withdrawing substituent; and where the recurring monomeric unit comprises at least about 50 weight percent of the polymer, and the polymer has a glass transition temperature between about 0°-120° C.
Claim 3
Dependent Claim
17 words
A liquid crystalline polymer in accordance with claim 1 wherein the main chain is a polysiloxane structure.
Claim 4
Dependent Claim
17 words
A liquid crystalline polymer in accordance with claim 1 wherein the main chain is a polyoxyalkylene structure.
Claim 5
Dependent Claim
28 words
A liquid crystalline polymer in accordance with claim 1 wherein X is --O--, --S-- or --NR--, where R is hydrogen or a C 1 -C 4 alkyl group.
Claim 6
Dependent Claim
20 words
A liquid crystalline polymer in accordance with claim 1 wherein Y is --NO 2 , --CN-- or CF 3 .
Claim 7
Dependent Claim
15 words
A transparent nonlinear optical medium comprising a liquid crystalline polymer in accordance with claim 1.
Claim 8
Dependent Claim
20 words
A nonlinear optical medium in accordance with claim 6 which is characterized by an external field-induced orientation of aligned mesogens.
Claim 9
Dependent Claim
112 words
In an optical switch or light modulator device with an organic nonlinear optical component the improvement which comprises a transparent solid medium comprising a polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR21## where P' is a polymer main chain unit, m is an integer with a value of at least 5, S' is a flexible spacer group having a linear chain length of between about 2-20 atoms, X is an electron-donating substituent, and Y is an electron-withdrawing substituent; and where the recurring monomeric unit comprises at least about 50 weight percent of the polymer, and the polymer has a glass transition temperature between about 0°-120° C.
Claim 10
Dependent Claim
112 words
In an optical switch or light modulator device with an organic nonlinear optical component the improvement which comprises a transparent solid medium comprising a polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR21## where P' is a polymer main chain unit, m is an integer with a value of at least 5, S' is a flexible spacer group having a linear chain length of between about 2-20 atoms, X is an electron-donating substituent, and Y is an electron-withdrawing substituent; and where the recurring monomeric unit comprises at least about 50 weight percent of the polymer, and the polymer has a glass transition temperature between about 0°-120° C.
Claim 11
Dependent Claim
21 words
A device in accordance with claim 8 wherein the polymer has a stable orientation of an external field-induced alignment of mesogens.
Claim 12
Dependent Claim
19 words
A device in accordance with claim 8 wherein the nonlinear optical component exhibits second order nonlinear optical susceptibility χ.sup.(2).
Claim 13
Dependent Claim
67 words
A thermotropic liquid crystalline polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR22## where R is hydrogen or a C 1 -C 4 alkyl group; n is an integer with a value of 2-20, and where the recurring monomer unit comprises at least about 50 weight precent of the polymer, and the polymer has a glass transition temperature between about 0°-120° C.
Claim 14
Dependent Claim
67 words
A thermotropic liquid crystalline polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR22## where R is hydrogen or a C 1 -C 4 alkyl group; n is an integer with a value of 2-20, and where the recurring monomer unit comprises at least about 50 weight precent of the polymer, and the polymer has a glass transition temperature between about 0°-120° C.
References Cited (Backward Citations)
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