Patent US4810433A successfully refreshed from Google Patents.
US4810433A
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Process for producing oriented film
Assignee: FUJI PPHOTO FILM Co Ltd NO 210 NAKANUMA MINAMI ASHIGARA-SHI KANAGAWA JAPAN
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Filing: 1986-09-24
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Granted: 1989-03-07
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Expires: 2006-09-24
Abstract
Abstract A process for producing a highly uniaxially oriented film is disclosed, comprising supporting a composition comprising two or more liquid crystal monomers displaying a nematic or smectic state and having a polymerizable functional group in the molecule thereof and a photopolymerization initiator on or between a support or supports having been subjected to orientation, and irradiating said composition with radiation while maintaining said composition in a liquid crystal state to cause polymerization of said composition. The resulting film is free from pinholes, strain or unevenness and is excellent in optical transparency.
Inventors
- 👤 Takashi Takayanagi
- 👤 Hideo Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:05
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; B; B29; B29C; B29C55/00; B29C55/005; C08; C08J; C08J5/00; C08J5/18; G; G02; G02B; G02B5/00; G02B5/30; G02B5/3016; B29K; B29K2105/00; B29K2105/0079
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
A process for producing an oriented film, which comprises supporting a composition comprising two or more liquid crystal monomers displaying a nematic or smectic state and having a polymerizable functional group in the molecule thereof and a photopolymerization initiator on or between a support or supports having been subjected to orientation, and irradiating said composition with radiation while maintaining said composition in a liquid crystal state to cause polymerization of said composition, wherein said two or more monomers are selected from acrylate and methacrylate monomers represented by the formula (I): ##STR25## wherein R represents a hydrogen atom or a methyl group; n represents an integer of from 1 to 8 and 11; and X represents a para-substituted aromatic ring or a parasubstituted heterocyclic ring, and wherein said photopolymerization initiator has at least one ethylenic linkage and at least one aromatic or heterocyclic aromatic ring in the molecule thereof.
Claim 2
Dependent Claim
148 words
A process for producing an oriented film, which comprises supporting a composition comprising two or more liquid crystal monomers displaying a nematic or smectic state and having a polymerizable functional group in the molecule thereof and a photopolymerization initiator on or between a support or supports having been subjected to orientation, and irradiating said composition with radiation while maintaining said composition in a liquid crystal state to cause polymerization of said composition, wherein said two or more monomers are selected from acrylate and methacrylate monomers represented by the formula (I): ##STR25## wherein R represents a hydrogen atom or a methyl group; n represents an integer of from 1 to 8 and 11; and X represents a para-substituted aromatic ring or a parasubstituted heterocyclic ring, and wherein said photopolymerization initiator has at least one ethylenic linkage and at least one aromatic or heterocyclic aromatic ring in the molecule thereof.
Claim 3
Dependent Claim
75 words
A process as in claim 1, wherein X in the formula (I) is ##STR26## wherein Z represents a cyano group, a fluorine atom, a chlorine atom, a bromine atom, a methoxy group, an ethoxy group, a propoxy group, a butoxy group, a pentyloxy group, a hexyloxy group, a heptyloxy group, an amino group, a nitro group, --NHQ or --NQ 2 , wherein Q represents a lower alkyl group having not more than 7 carbon atoms.
Claim 4
Dependent Claim
15 words
A process as in claim 1, wherein R in the formula is a hydrogen atom.
Claim 5
Dependent Claim
35 words
A process as in claim 1, wherein said two or more monomers are selected so that a difference of the value n in the formula (I) between each pair of monomers does not exceed 5.
Claim 6
Dependent Claim
117 words
A process as in claim 1, wherein said photopolymerization initiator is represented by the formula (II) or (III): ##STR27## wherein Ar represents a substituted or unsubstituted aromatic ring or heterocyclic ring; R 1 represents a hydrogen atom, an alkyl group or an aryl group; and R 2 represents a chlorine atom or a bromine atom, ##STR28## wherein R 2 is as defined above; R 3 represents --CR 2 3 , --NH 2 , --NHR 5 , --NR 5 or --OR 5 , represents a phenyl group or a lower alkyl group having not more than 11 carbon atoms; R 4 represents a substituted or unsubstituted aromatic ring or heterocyclic ring; and m represents 1, 2 or 3.
Claim 7
Dependent Claim
30 words
A process as in claim 1, wherein said photopolymerization initiator is present in an amount of from 0.2 to 5% by weight based on the total amount of the monomers.
Claim 8
Dependent Claim
17 words
A process as in claim 1, wherein said radiation includes ultraviolet rays, electron rays or visible light.
Claim 9
Dependent Claim
78 words
A process for producing an oriented film as in claim 1, which comprises supporting a composition consisting essentially of two or more liquid crystal monomers displaying a nematic or smectic state and having a polymerizable functional group in the molecule thereof and a photopolymerization initiator on or between an support or supports having been subjected to orientation, and irradiating said composition with radiation while maintaining said composition in a liquid crystal state to cause polymerization of said composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |