Compositions – Liquid crystal compositions
Patent
1997-04-11
1999-01-05
Kelly, C. H.
Compositions
Liquid crystal compositions
2522996, 25229961, 25229962, 25229963, 25229965, 25229966, 25229967, 570144, 568626, 568647, C09K 1952, C09K 1906, C09K 1934, C07C 2200
Patent
active
058558128
ABSTRACT:
A process for controlling the cone tilt angle of a tilted smectic liquid crystal composition comprises the step of combining (a) at least one liquid crystal composition comprising at least one smectic or latent smectic liquid crystal compound comprising (i) an aliphatic fluorocarbon terminal portion comprising a terminal fluoroalkyl or fluoroether group and an alkylene group having at least two carbon atoms and containing at least one catenary ether oxygen atom, (ii) an aliphatic hydrocarbon terminal portion, and (iii) a central core connecting the terminal portions, wherein the alkylene group of the aliphatic fluorocarbon terminal portion is directly linked to the central core by a moiety selected from the group consisting of a covalent bond, --CH.dbd.CH--, and --C.tbd.C--; and (b) at least one liquid crystal composition comprising at least one smectic or latent smectic liquid crystal compound; with the provisos that at least one of the compositions (a) and (b) comprises at least one chiral liquid crystal compound and that the combining of compositions (a) and (b) provides an optically active, tilted chiral smectic liquid crystal composition. The process enables control of cone tilt angle and thereby control of the brightness characteristics of liquid crystal display devices.
REFERENCES:
patent: 2519983 (1950-08-01), Simons
patent: 3470258 (1969-09-01), Tesoro
patent: 4001137 (1977-01-01), Steinstrasser
patent: 4011173 (1977-03-01), Steinstrasser
patent: 4113647 (1978-09-01), Coates et al.
patent: 4202791 (1980-05-01), Sato et al.
patent: 4256656 (1981-03-01), Beguim et al.
patent: 4330426 (1982-05-01), Eidenschink et al.
patent: 4367924 (1983-01-01), Clark et al.
patent: 4393231 (1983-07-01), Misaki et al.
patent: 4400293 (1983-08-01), Romer et al.
patent: 4411494 (1983-10-01), Crossland et al.
patent: 4419664 (1983-12-01), Crossland et al.
patent: 4439015 (1984-03-01), Rich et al.
patent: 4481149 (1984-11-01), Misaki et al.
patent: 4528562 (1985-07-01), Crossland et al.
patent: 4564694 (1986-01-01), Hirai et al.
patent: 4572794 (1986-02-01), Eidenschink et al.
patent: 4576732 (1986-03-01), Isogai et al.
patent: 4592858 (1986-06-01), Higuchi et al.
patent: 4613209 (1986-09-01), Goodby et al.
patent: 4614608 (1986-09-01), Le Barney et al.
patent: 4617140 (1986-10-01), Eidenschink et al.
patent: 4668427 (1987-05-01), Saito et al.
patent: 4780242 (1988-10-01), Miyazawa et al.
patent: 4816178 (1989-03-01), Katagiri et al.
patent: 4816596 (1989-03-01), Langlois
patent: 4837364 (1989-06-01), Desbois et al.
patent: 4876027 (1989-10-01), Yoshinaga et al.
patent: 4879060 (1989-11-01), Shionozaki et al.
patent: 4886619 (1989-12-01), Janulis
patent: 4914224 (1990-04-01), Shoji et al.
patent: 5051527 (1991-09-01), Suzuki et al.
patent: 5062691 (1991-11-01), Tristani-Kendra et al.
patent: 5082587 (1992-01-01), Janulis
patent: 5141669 (1992-08-01), Bloom et al.
patent: 5167859 (1992-12-01), Wachtler et al.
patent: 5194179 (1993-03-01), Suzuki et al.
patent: 5196140 (1993-03-01), Poetsch et al.
patent: 5252695 (1993-10-01), Niciri et al.
patent: 5262082 (1993-11-01), Janulis et al.
patent: 5348677 (1994-09-01), Poetsch et al.
patent: 5362919 (1994-11-01), Costello et al.
patent: 5377033 (1994-12-01), Radcliffe
patent: 5399291 (1995-03-01), Janulis et al.
patent: 5417883 (1995-05-01), Epstein et al.
patent: 5437812 (1995-08-01), Janulis et al.
patent: 5474705 (1995-12-01), Janulis et al.
patent: 5482650 (1996-01-01), Janulis et al.
patent: 5626793 (1997-05-01), Reiffenrath et al.
patent: 5653923 (1997-08-01), Nakamura et al.
patent: 5658491 (1997-08-01), Kistner et al.
Jager et al., "Synthesis of Amino Sugars via Isoxazolines: D-Allosamine," Synthesis, pp. 556-560 (1990).
Chaudhary et al., "A Simplified Procedure for the Preparation of Triphenylmethylethers," Tetrahedron Letters, pp. 95-98 (1979).
Middleton, "New Fluorinating Reagents. Dialkylaminosulfur Fluorides," J. Org. Chem. vol. 40, No. 5, pp. 574-578 (1975).
Sakaguchi et al., "New Materials for Ferroelectric Liquid Crystals. Novel Compounds Containing Chiral .gamma.-Lactone Ring," Ferroelectrics, vol. 114, pp. 265-272 (1991).
Fukuda et al., "Antiferroelectric Chiral Smectic Liquid Crystals," J. Mater. Chem, vol. 4, pp. 997-1016 (1994).
Naciri et al., "Effect of Chiral End Group Variation of the Properties of Ferroelectric Copolymers," Ferroelectrics, vol. 148, pp. 297-310 (1993).
Pelzl et al., "Field-induced Colour Change of Liquid Crystalline Dyes," Kristall und Technik, vol. 14, pp. 817-823 (1979).
Pelzl et al., "Freedericksz Transition of Planar Oriented Smectic C Phases," Liquid Crystals, vol. 2, No. 2, pp. 131-148 (1987).
Sierra et al., "Synthesis and Study of New .alpha.-Haloacid Ferroelectric Liquid Crystal Derivatives. MM2 Approach to the Molecular Structure-Ferroelectric Activity Relationship," Am. Chem. Soc., vol. 114, No. 20, pp. 7645-7651 (1992).
Meyer et al., "Ferroelectric Liquid Crystals," J. Physique, vol. 36, pp. L-69-L-71 (1975).
Zaschke et al., "Synthese niedrigschmelzender Kristallin-Flussiger vol. 15, pp. 441-441 (1975).
Mochizuki et al., "A High Contrast SSFLC Display Utilizing Naphtalene Base Liquid Crystal Materials and Conductive Orientation Films," SPIE, vol. 1665, pp. 102-113 (1992).
Pelzl et al., "Tilt Angle Determination of a Smectic C Phase by Field-Induced Freedericksz Transition and X ray Investigations," Mol. Cryst. Liq Cryst., vol. 53, pp. 167-179 (1979).
Clark et al., "Submicrosecond Bistable Electro-Optic Switching in Liquid Crystals," Appl. Phys. Lett., vol. 36, pp. 899-901 (1980).
Holy et al., "Nucleic Acid Components and Their Analogues. CLVIII. Preparation of Some Substituted 2-Amino- and 2-Mercaptopyrimidines from Trimethinium Salts," Collection Chzechoslov. Chem. Commun., vol. 38, pp. 1371-1381 (1973).
Kahn, "Laser-addressed Thermo-Optic Smectic Liquid-Crystal Storage Displays," Appl. Phys. Lett., vol. 22, No. 3, pp. 111-113 (1973).
Lagerwall et al., 1st International Symposium On Ferroelectric Liquid Crystals, Bordeaux-Arcachon, France (1987).
Partridge et al., "Amidines. Part IV. Preparation of Amidines from Cyanides and Ammonium Thiocyanate or Substituted Ammonium Thiocyanates," J. Chem. Soc., pp. 390-394 (1947).
Savu, "Perfluoroalkanesulfonic Acids," Kirk-Othmer Encyclopedia of Chemical Technology, Fourth Edition, vol. 11, pp. 558-564, John Wiley & Sons, New York (1994).
Knunyants et al., "Polyfluorinated Linear Bifunctional Compounds (Containing Like Functions) as Potential Monomers," Advances in Chem. (Uspekhi Khimi) vol. 32, original 1502, Eng. Trans, 461-476 (1963) Translation RSIC-165 (Redstone Information Center).
Arnold et al., "Synthetische Reaktionen Von Dimethylformamid I. Allegemeine Synthese Von .beta.-Dialdehyden," Coll. Czech. Chem. Commun., vol. 23, pp. 452-461 (1958).
Abe et al., "Electrochemical Fluorination (Simons Process) as a Route to Perfluorinated Organic Compounds of Industrial Interest," Preparation, Properties and Industrial Applications of Organofluorine Compounds, pp. 20-41 (1982).
Patent Abstracts of Japan, vol. 15, No. 271 (C-0848), Jul. 10, 1991.
Titov et al., "Synthesis and Mesomorphism of Aryl .rho.-Fluoralkyl(alkoxy)benzoates," Mol. Cryst. Liq. Cryst., vol. 47, pp. 1-5 (1978).
Ivashchenko et al., "New Mesogenic Compounds with a Large Dielectric Anisotropy," Mol. Cryst. Liq. Cryst., vol. 67, pp. 235-240 (1981).
Efron et al., "The Silicon Liquid-Crystal Light Valve," J. Appl. Phys., vol. 57(4), pp. 1356-1368 (1985).
Mahler, "Smectic Liquid Crystal from (Perfluorodecyl)Decane," Mol. Cryst. Liq. Cryst., vol. 2(3-4), pp. 111-119 (1985).
Decobert et al., "Synthesis and Mesomorphysm of Some New Ferro-Electric Smectic Liquid Crystals," Mol. Cryst. Liq. Cryst., vol. 114, pp. 237-247 (1984).
Eaton et al., "Studies in Organophosphorus Chemistry. I. Conversion of Alcohols and Phenols to Halides by Tertiary Phosphone Dihalides," J. Am. Chem. Soc., vol. 86, pp. 964-965 (1964).
Kondo et al., "New Room-Temperature Ferroelectric Liquid Crystals--Material Constants and Electro-Optic Properties-," Jap. Journal of Applied Physics, vol. 24, No. 11, pp. 1389-1393 (1985).
Gray
Radcliffe Marc D.
Savu Patricia M.
Snustad Daniel C.
Spawn Terence D.
Kelly C. H.
Minnesota Mining and Manufacturing Company
Weiss Lucy C.
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