Phenyl Benzoate Derivative Patents (Class 252/299.67)
-
Patent number: 7122227Abstract: The invention relates to chiral photoisomerizable compounds of formula (I) wherein X1, X2, X3, X4, X5 and X6 have the meanings given in claim 1, to liquid crystalline mixtures and polymers containing them, and to the use of chiral photoisomerizable compounds, liquid crystalline mixtures and polymers containing them in optical and electrooptical devices like liquid crystal displays or projection systems, in optical elements like polarizers, retardation films, compensators, color filters or holographic elements, in liquid crystal pigments and colored films or coatings for decorative or security applications, cosmetic and pharmaceutical compositions, in nonlinear optics and optical information storage.Type: GrantFiled: September 21, 2001Date of Patent: October 17, 2006Assignee: Merck Patent GesellschaftInventors: Julian Vaughn-Spickers, Simon Greenfield, Ian Victor Edward Hassall, Christopher Dunn, Richard Harding, Tony Jenkins, Alison May
-
Patent number: 7115307Abstract: Nematic liquid crystal mixtures with weak zenithal anchoring energy for bistable display devices, comprising at least 40% by weight of compounds with strong molecular polarisability and strong dipole moment.Type: GrantFiled: February 25, 2004Date of Patent: October 3, 2006Assignee: NemopticInventors: Jean Claude Dubois, Didier Gallaire, Stéphane Joly, Ivan N Dozov, Philippe Martinot-Lagarde, Daniel N Stoenescu
-
Patent number: 7108801Abstract: A method for producing a blend comprising randomly substituted mesogens comprising: providing one or more platform molecules have the following general structure: wherein at least one member selected from the group consisting of X and Y comprises one or more spacer groups; R2 is a bulky organic group whereby, when both X and Y are reacted with polymerizable groups to produce polymerizable mesogens, R2 provides sufficient steric hindrance to achieve a nematic state at room temperature while suppressing crystallinity of the polymerizable mesogens at room temperature; and, R1 and R3 are selected from groups less bulky than R2; and independently substituting at least one member selected from the group consisting of X and Y with a polymerizable group, thereby producing a blend of randomly substituted mesogens.Type: GrantFiled: January 23, 2002Date of Patent: September 19, 2006Assignee: Southwest Reasearch InstituteInventors: Stephen T. Wellinghoff, Douglas P. Hanson
-
Patent number: 7105106Abstract: Thermotropic liquid crystalline polymers are produced by the reaction of a polyester made from an aromatic dicarboxylic acid and a diol, one or more hydroxycarboxylic acids, a stoichiometric excess of an aromatic diol, and a carboxylic acid anhydride. Also disclosed are novel liquid crystalline polymers that may be produced by this process. These liquid crystalline polymers are useful as molding resins and shaped articles thereof are produced. In particular, the articles include films, sheets, containers and portions thereof comprising these LCPs.Type: GrantFiled: July 11, 2003Date of Patent: September 12, 2006Assignee: E. I. du Pont de Nemour and CompanyInventors: Michael Robert Samuels, Marion Glen Waggoner, Julius Uradnisheck
-
Patent number: 7105210Abstract: A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which contains one or more compounds of the formula I and one or more compounds of the formula IA in which R1, R2, ring A, L1-8, Z1, X1 and X2 are as defined in claim 1.Type: GrantFiled: March 5, 2004Date of Patent: September 12, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Izumi Saito, Sabine Schoen, Peer Kirsch
-
Patent number: 7101595Abstract: The present invention provides a compound represented by formula (1) defined in the specification. The invention further provides a liquid crystal composition comprising at least two compounds, which at least one compound out of them is the above compound. The invention still further provides a polymer obtained by polymerizing the above composition, and uses of the polymer such as a molded article having an optical anisotropy, an optical compensation element, a wavelength functional plate, an optical element, and a liquid crystal display element comprising the polymer.Type: GrantFiled: July 29, 2004Date of Patent: September 5, 2006Assignees: Chisso Corporation, Chisso Petrochemical CorporationInventors: Ryushi Shundo, Hiromichi Inoue, Tomohiro Etou
-
Patent number: 7098359Abstract: New, efficient methods for making novel platform molecules and polymerizable mesogens are provided, as well as the novel mesogens and methods of using same.Type: GrantFiled: July 5, 2002Date of Patent: August 29, 2006Assignee: Southwest Research InstituteInventors: Stephen T. Wellinghoff, Douglas P. Hanson
-
Patent number: 7094358Abstract: Resin blends comprising liquid crystal monomers and secondary monomers useful to blend with liquid crystal monomers to maintain a nematic state under processing conditions while maintaining low cute shrinkage, particularly suitable for use in dental resin composites.Type: GrantFiled: March 7, 2002Date of Patent: August 22, 2006Assignee: The University of Texas SystemInventors: Barry K. Norling, Neera Satsangi
-
Patent number: 7094359Abstract: An object of the present invention is to provide a micro powder capable of producing a thin film with precision thickness. This object is achieved by a micro powder having an average particle size of from 0.5 to 50 ?m, obtained by grinding a liquid crystalline polyester having a flow beginning temperature of from 200° C. to 270° C.Type: GrantFiled: March 13, 2003Date of Patent: August 22, 2006Assignee: Sumitomo Chemical Company, LimitedInventors: Satoshi Okamoto, Manabu Hirakawa
-
Patent number: 7087273Abstract: A novel liquid crystalline compound has the formula: Z1-(CH2)n-L1-P1-L2-P2-L3-P3-L4-(CH2)m-Z2 ??(1) wherein Z1 and Z2 are each independently a group represented by any one of formulas (2), (3) and (4) below, L1, L2, L3, and L4 each independently indicate direct bond or are a group represented by any of —O—, —O—CO—, or —CO—O—, P1 and P2 are each independently a group represented by formula (5) below, and P3 indicates direct bond or is a group represented by formula (5) below, n and m are each independently an integer of 0 to 8; wherein X is selected from the group consisting of hydrogen, methyl, or halogen and provides an optical film with an excellent capability of retaining the aligned liquid crystal orientation which has been fixed and in mechanical strength.Type: GrantFiled: March 16, 2004Date of Patent: August 8, 2006Assignee: Nippon Oil CorporationInventors: Takuya Matsumoto, Hitoshi Mazaki
-
Patent number: 7081280Abstract: A liquid-crystalline medium containing a mixture of polar compounds of positive dielectric anisotropy. The mixture contains one or more compounds of formula I in which: R is H, an alkyl or alkenyl radical having 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, where one or more CH2 groups in these radicals are optionally, in each case independently of one another, replaced by —O—, —S—, —CO—, —CO—O—, —O—CO— or —O—CO—O in such a way that O atoms are not linked directly to one another; is a trans-1,4-cyclohexylene ring, in which one or two CH2 groups are optionally replaced by —O— and/or —S—, or a cyclohexenylene ring; Y is halogenated alkyl, halogenated alkenyl, halogenated alkoxy or halogenated alkenyloxy having 1 to 6 carbon atoms; Z is —OCH2—, —CH2CH2—, —CH?CH—, —CF2O—, —OCF2—, —C2F4— or a single bond; and n is 1 or 2.Type: GrantFiled: July 2, 2004Date of Patent: July 25, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
-
Patent number: 7081281Abstract: The present invention provides a polymerizable liquid crystal compound having an excellent durability against blue laser light and having a small refractive index and small light absorption, a liquid crystal composition containing the compound, and an optical anisotropic material using the liquid crystal composition. The polymerizable liquid crystal compound represented by the following formula (1), provided that R1 is a hydrogen atom or a methyl group, Cy is a trans-1,4-cyclohexylene group, X1 is a 1,4-phenylene group or a trans-1,4-cyclohexlyene group, and R2 is a C1-8 alkyl group. The above 1,4-phenylene group and the trans-1,4-cyclohexylene group may be such that a hydrogen atom bonded to a carbon atom in each group may be substituted by a fluorine atom, a chlorine atom or a methyl group.Type: GrantFiled: February 10, 2006Date of Patent: July 25, 2006Assignee: Asahi Glass Company, LimitedInventors: Hiroshi Kumai, Hiromichi Nagayama
-
Patent number: 7078079Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterised in that it comprises one or more compounds of the general formula I in which R1, L1, L2, L3, L4, L5, L6, Z1, Z2, X, v and u are as defined in claim 1.Type: GrantFiled: September 20, 2001Date of Patent: July 18, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Achim Goetz, Peer Kirsch, Detlef Pauluth, Matthias Bremer, Sabine Schoen, Georg Lüssem, Christian Hock
-
Perfluoropropenyl-containing compound, liquid crystal composition and liquid crystal display element
Patent number: 7074464Abstract: A compound represented by the formula (1). wherein Ra is alkyl having 1 to 10 carbon(s) and, in that alkyl, any of —CH2— may be replaced with —O—, —S—, —CO—, —CH?CH— or —C?C— or any of hydrogens may be replaced with halogen or —CN; A1, A2 and A3 are independently 1,4-cycolohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl or 1,4-bicyclo[2.2.2]octylene and, in such a ring, any —CH2— may be replaced with —O—, any —CH? may be replaced with —N? and any hydrogen may be replaced with halogen; Z1, Z2 and Z3 are independently a single bond, —(CH2)2—, —(CF2)2—, —COO—, —OCO—, —CH2O—, —OCH2—, —CF2O—, —OCF2—, —CH?CH—, —CF?CF—, —C?C—, —(CH2)4—, —(CH2)3O— or —O(CH2)3—; p and q are independently 0 or 1. Also provided is a liquid crystal composition containing the same and a liquid crystal display element containing the composition.Type: GrantFiled: May 13, 2004Date of Patent: July 11, 2006Assignees: Chisso Petrochemical Corporation, Chisso CorporationInventor: Takashi Kato -
Patent number: 7070711Abstract: Liquid crystalline compositions contain no functional group the synthesis of which is difficult, such as (meth)acrylate and epoxy group and comprise (A) an oxetane compound having an optically active portion, (B) a side chain liquid crystalline polymeric substance having an oxetanyl group, and (C) a photo cation generator and/or a thermal cation generator. The use of the composition can provide a cholesteric-aligned liquid crystal film with excellent alignment retention properties after being fixed in the liquid crystal state and mechanical strength, without employing any complicated step such as photo irradiation under an inert gas atmosphere.Type: GrantFiled: October 14, 2004Date of Patent: July 4, 2006Assignee: Nippon Oil CorporationInventors: Takashi Seki, Takuya Matsumoto, Toru Nakamura, Hitoshi Mazaki
-
Patent number: 7070712Abstract: There is disclosed a liquid crystalline polyacetylene having a repeat structure of the formula where spa is a spacer group and mes is a mesogenic substituent.Type: GrantFiled: April 12, 2005Date of Patent: July 4, 2006Assignee: The Hong Kong University of Science & TechnologyInventors: Ben Zhong Tang, Wing Yip Lam, Xiangxing Kong, Hoi Sing Kwok
-
Patent number: 7070838Abstract: The present invention provides a compound represented by formula (1) defined in the specification and a liquid crystal composition comprising the compound. The invention further provides a polymer obtained by polymerization of compound or composition above, and further the present invention provides a film, an optical anisotropic material, A ¼ or ½ wavelength functional plate, an optical compensation element, an optical element and a liquid crystal display element employing the polymer.Type: GrantFiled: June 23, 2004Date of Patent: July 4, 2006Assignees: Chisso Petrochemical Corporation, Chisso CorporationInventors: Yasuyuki Sasada, Motoki Yanai
-
Patent number: 7063805Abstract: A nematic liquid crystal composition includes a compound of formula (1) and a host mixture: wherein ‘R’ is chosen from CnH2n+1O, CnH2n+1, CnH2n+1S or CnH2n?1; ‘n’ is an integer of 1 to 15; ‘A’ is ‘a’ is 0 or 1; ‘B’ is —CH2CH2—, —C?C—, —C?C— or ‘b’ is 0 or 1; ‘D’ is —CH2CH2—, —C?C— or —C?C—; ‘d’ is 0 or 1; ‘X’ is H, F, Cl, Br, NCS or CN; and ‘Y’ is from NCS, SCN or F. A liquid crystal display apparatus employing the nematic liquid crystal composition has a high response speed and a high phase transition temperature. In addition, the nematic liquid crystal composition has an augmented birefringence and a dielectric anisotropy. The liquid crystal display apparatus using the nematic liquid crystal composition may have an enhanced brightness.Type: GrantFiled: June 30, 2004Date of Patent: June 20, 2006Assignee: Samsung Electronics Co., Ltd.Inventor: Byeong-Seob Ban
-
Patent number: 7060200Abstract: The invention relates to multireactive polymerizable mesogenic compounds of formula I R1—MG—R2I wherein R1, R2 and MG have the meaning given in claim 1, to a polymerizable mesogenic composition comprising at least two components, at least one which is a compound of formula I, to a linear or crosslinked polymer obtainable by polymerization of one or more compounds of formula I or of a polymerizable composition comprising one or more compounds of formula I and to the use of a compound of formula I, or a polymerizable composition or polymer obtainable thereof, in optical elements such as polarizers, optical retardation or compensation films, alignment layers, colour filters or holographic elements, in liquid crystal displays such as PDLC, polymer gel or polymer stabilized cholesteric texture (PSCT) displays, in adhesives, synthetic resins with anisotropic mechanical properties, cosmetics, diagnostics or liquid crystal pigments, for decorative and security applications, and for nonlinear optics or optical inforType: GrantFiled: September 1, 2000Date of Patent: June 13, 2006Assignee: Merck Patent GmbHInventors: Louise Farrand, David Coates
-
Patent number: 7056561Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterised in that it comprises one or more ester compounds of the formula I and one or more compounds of the formula IA in which R1, R2, ring A, ring B, L1-6, Z1, Z2, X1 and X2 are as defined in claim 1.Type: GrantFiled: September 9, 2004Date of Patent: June 6, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Sabine Schoen, Peer Kirsch, Brigitte Schuler, Izumi Saito
-
Patent number: 7052744Abstract: Nematic liquid-crystal mixtures comprising one or more compounds of the formula I in which R1 and R2 are as defined herein, are suitable for use in TN and STN liquid-crystal displays.Type: GrantFiled: April 7, 2004Date of Patent: May 30, 2006Assignee: Merck Patent GmbHInventors: Harald Hirschmann, Sven Schuepfer, Renate Graulich, Martina Weidner, Kevin Adlem, Mark John Goulding, Patricia Saxton
-
Patent number: 7052742Abstract: Fluorinated five-membered ring compounds of the formula (I) R1—X—(A1—M1)a—(A2—M2)b—A3—Y—E ??(I) where E is a radical T—Z—R2 containing a five-membered ring and, for example, T is undirected and is 4-fluorothiophene-2,5-diyl, 3-fluorothiophene-2,5-diyl, 3-fluorothiophene-2,4-diyl, 5-fluorothiophene-2,4-diyl, furan-2,5-diyl, furan-2,4-diyl, isoxazole-3,5-diyl, thiazole-2,5-diyl, thiazole-2,4-diyl, cyclopentane-1,3-diyl or cyclopentene-1,3-diyl, R1 and R2 are hydrogen, X is a single bond, —O—, OC(?O)—, —C(?O)O— or —OC(?O)O—, Y is —OC(?O)—, —OCH2—, —CH2CH2—, Z is a single bond or —O—, A1, A2, A3 are each, independently of one another, phenylene-1,4-diyl, M1, M2 are undirected and are each, independently of one another, —OC(?O)—, —OCH2—, —CH2CH2—, —OC(?O)CH2CH2—, —OCH2CH2CH2—, —C?C—, —CH2CH2CH2CH2— or a single bond, a, b are each, independently of one another, 0 or 1, are used in FLC mixtures.Type: GrantFiled: August 31, 2000Date of Patent: May 30, 2006Assignee: Clariant International Ltd.Inventors: Barbara Hornung, Toshiaki Nonaka, Ayako Ogawa, Wolfgang Schmidt, Rainer Wingen
-
Patent number: 7048974Abstract: The invention relates to TN and STN liquid-crystal displays and to the nematic liquid-crystal mixtures used therein, characterised in that they comprise one or more compounds of the formula I and one or more compounds of the formula II in which ring A, R1, R2 and Y are as defined in Claim 1.Type: GrantFiled: April 25, 2002Date of Patent: May 23, 2006Assignee: Merck Patentgesellschaft Mit Beschrankter HaftungInventors: Antje Mühlfeld, Michael Junge, Harald Hirschmann, Sabine Schoen, Juliane Suermann, Ursula Patwal, Dagmar Zimmermann
-
Patent number: 7045176Abstract: The present invention relates to a liquid crystal composition having a high-speed response property and a liquid crystal display using the same, more particularly to a liquid crystal composition, wherein the liquid crystal has a high phase transition temperature, large birefringence index and modulus of elasticity, and a wide operable nematic temperature range, so that a high-speed response can be obtained to be useful for many liquid crystal devices including LCDs, and a liquid crystal display using the same.Type: GrantFiled: November 26, 2003Date of Patent: May 16, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-Kuk Yun, Bong-Hee Kim, Bong-Sung Seo, Byeong-Seob Ban
-
Patent number: 7041347Abstract: Liquid-crystalline media comprising one or more compounds of the formula I in which Ra, Rb, L and r are as defined herein, are suitable for use in, for example, TN and STN liquid crystal displaysType: GrantFiled: February 13, 2004Date of Patent: May 9, 2006Assignee: Merck Patent GmbHInventors: Harald Hirschmann, Martina Weidner, Sven Schüpfer, Renate Graulich, Mark John Goulding, Martin Heeney, Warren Duffy
-
Patent number: 7041234Abstract: A method for producing platform molecules comprising: forming a mixture comprising first and second phenylene rings comprising halogenated carboxylic groups, and a third phenylene ring comprising a desired substituent and a first functionality at a para-position to a second funcitonality; and exposing the mixture to conditions effective to react the first halogenated carboxylic group with the first functionality to produce a first ester bond, and the second halogenated carboxylic group with the second functionality to produce a second ester bond; producing platform molecules comprising terminal groups comprising the first functional group at a position para to first ester bond and the second functional group at a position para to the second ester bond.Type: GrantFiled: January 23, 2002Date of Patent: May 9, 2006Assignee: Southwest Research InstituteInventors: Stephen T. Wellinghoff, Douglas P. Hanson
-
Patent number: 7033654Abstract: A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which medium exhibits a birefringence value of ?0.065 and includes one or more compounds of formula Ia and at least one compound of the formula Xc or Xd: in which R, alkyl, alkenyl and alkenyl* are as defined in claim 1.Type: GrantFiled: July 2, 2004Date of Patent: April 25, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
-
Patent number: 7033651Abstract: The invention relates to a liquid-crystalline medium comprising a mixture of at least two compounds of the general formula (I) R1-Am-Bn-Z1-C-Z2-D-R2??(I) in which R1 is H, an alkyl or alkenyl radical having 1 to 15 carbon atoms and 2 to 15 carbon atoms, respectively, which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, where one or more CH2 groups in these radicals may also, in each case independently of one another, be replaced by —O—, —S—, ?—CO—, —CO—O—, —O—CO— or —O—CO—O— in such a way that O atoms are not linked directly to one another; A, B, C and D are each, independently of one another, in which Y, Y1, Y2, Y3, Y4, Y5 and Y6 are each, independently of one another, H or F; C is, in addition to the abovementioned meanings, Z1 and Z2 are each, independently of one another, a single bond, —CH2O—, —OCH2—, —CH2—CH2—, —CH?CH—, —C?C—, —CF2—CF2—, 13 CF2O—, —OCF2— or —CO—O—; R2 is, in addition to the abovementioned meanings of R1, F, CF3, OCF3, OCHF2, OCH2CFType: GrantFiled: April 17, 2001Date of Patent: April 25, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Detlef Pauluth
-
Patent number: 7029729Abstract: The invention provides a cholesteric liquid crystal composition that includes at least one cholesteric liquid crystal precursor, and at least one non-liquid crystalline additive that is a non-liquid crystalline compound of formula I The invention also provides cholesteric liquid crystal films and optical bodies formed from cholesteric liquid crystal compositions of the invention. The invention further provides an optical display that includes a display medium, and a reflective polarizer including a cholesteric liquid crystal composition in accordance with the invention.Type: GrantFiled: February 24, 2003Date of Patent: April 18, 2006Assignee: 3M Innovative Properties CompanyInventors: Terence D. Spawn, Marc D. Radcliffe, Richard J. Pokorny
-
Patent number: 7029731Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I in which R, A1, Z1, Y and L are as defined in claim 1.Type: GrantFiled: August 6, 2003Date of Patent: April 18, 2006Assignee: Merck Patent GmbHInventors: Kazuaki Tarumi, Brigitte Schuler, Eike Poetsch, Volker Reiffenrath, Yukiomi Tanaka
-
Patent number: 7026022Abstract: The invention relates to a liquid crystalline medium characterized by containing one or more compounds of general formula (I) and one or more compounds of formula (II), wherein R1, R2, R3, R4 and c have the meanings as cited in Claim No. 1.Type: GrantFiled: January 14, 2005Date of Patent: April 11, 2006Assignee: Merck Patent GmbHInventors: Melanie Klasen-Memmer, Dagmar Klement, Matthias Bremer
-
Patent number: 7026020Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which medium comprises one or more compounds the general formula Ia and one or more compounds selected from the group consisting of compounds of the formula III and V to VIII: The notations r, R, R0, X0, Z0 and Y1-4 are defined herein.Type: GrantFiled: July 2, 2004Date of Patent: April 11, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
-
Patent number: 7022259Abstract: A liquid crystal compound with high helical twisting power, a method for preparing the same, and a liquid crystal composition containing the same. The liquid crystal compounds include cyclic group chain structures similar to the liquid crystal to serve as the core structure, and multi-ring structures of natural alcohol with optical activity, such as alcoholates of terpenol, borneol, cinchonidine, quinine, or derivatives thereof. As a result, the liquid crystal composition containing the liquid crystal compounds can filter out light of specific wavelengths from incident light due to optical activity and high helical twisting power thereof.Type: GrantFiled: September 30, 2003Date of Patent: April 4, 2006Assignee: Industrial Technology Research InstituteInventors: Dao-Hung Lee, Ding-Jen Chen, Kung-Lung Cheng
-
Patent number: 7014791Abstract: Liquid crystalline polymer having repeat units derived from 4,4?-biphenol, terephthalic acid, 2,6-naphthalenedicarboxylic acid, and 4-hydroxybenzoic acid in a limited compositional range have melting points of 400° C. or more, and are useful for molded articles and for films, particularly for uses where good high temperature resistance is needed.Type: GrantFiled: December 2, 2003Date of Patent: March 21, 2006Assignee: E.I. du Pont de Nemours and CompanyInventors: Marion G. Waggoner, Michael Robert Samuels
-
Patent number: 7001648Abstract: A glassy chiral-nematic liquid crystal composition includes a compound having the structural formula wherein each N represents a nematic group connected to the 1, 3, 5-benzenetricarbonyl central moiety by a carboxylic ester linkage and Ch represents a chiral group connected to the central moiety by a carboxylic ester linkage. An optical device is formed from at least one of the glassy chiral-nematic liquid crystal compositions.Type: GrantFiled: March 19, 2004Date of Patent: February 21, 2006Assignee: University of RochesterInventors: Shaw H. Chen, Huang-Ming Philip Chen
-
Patent number: 7001646Abstract: The invention relates to a liquid crystalline medium based on a mixture of polar compounds with positive dielectric anisotropy, characterized in that said medium contains one or more alkenyl compounds of the formula (I) and one or more compounds of the formula (IA) wherein R, R1, R2, ring A and ring B, L1, L2; L3; L4; X, Z1, Z2, y and z have the meanings cited in Claim 1.Type: GrantFiled: December 18, 2000Date of Patent: February 21, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Achim Goetz, Peer Kirsch, Eike Poetsch, Detlef Pauluth
-
Patent number: 7001647Abstract: A novel perfluoroallyloxy compound represented by general formula (I) and a liquid crystal composition containing the compound are disclosed.Type: GrantFiled: December 4, 2003Date of Patent: February 21, 2006Assignee: Asahi Denka Co., Ltd.Inventors: Hirokatsu Shinano, Takahiro Otsuka, Masatomi Irisawa
-
Patent number: 6974607Abstract: Tetrahydropyran derivatives having at least one ester group (—CO—O—) and at least one group —CN, —NCS, —F, —Cl, —OCHF2, —OCF3, —CF3, —OCHFCF3, —OCF2CHFCF3, SF5, or —OCF2CF3; a process for preparing said tetrahydropyran derivatives, and the use of said tetrahydropyran derivatives as a component in a liquid crystal composition.Type: GrantFiled: May 27, 2004Date of Patent: December 13, 2005Assignee: Merck Patent GmbHInventors: Mark John Goulding, Warren Duffy, Kevin Adlem, Peer Kirsch, Alexander Hahn, Eike Poetsch, Werner Binder, Volker Meyer, Melanie Klasen-Memmer, Michael Heckmeier, Georg Lüssem
-
Patent number: 6964794Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the formula I in which R1, L1 and L2 are as defined in claim 1.Type: GrantFiled: July 8, 2004Date of Patent: November 15, 2005Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Izumi Saito, Volker Reiffenrath, Georg Luessem, Christian Hock
-
Patent number: 6962733Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the formula I in which R1, L1 and L2 are as defined in claim 1.Type: GrantFiled: July 8, 2004Date of Patent: November 8, 2005Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Izumi Saito, Volker Reiffenrath, Georg Luessem, Christian Hock
-
Patent number: 6953610Abstract: A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which contains: one or more compounds of the general formula I ?in which R, ?Y, Z and n are as defined in claim 1, one or more compounds of the following formulae IIa, IIb, IIc and IId and one or more compounds of the formula in which Ro, Xo, Y2 and r are as defined in claim 1.Type: GrantFiled: July 2, 2004Date of Patent: October 11, 2005Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
-
Patent number: 6951669Abstract: A liquid-crystalline medium having a mixture of polar compounds of positive dielectric anisotropy is described.Type: GrantFiled: July 2, 2004Date of Patent: October 4, 2005Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
-
Patent number: 6939940Abstract: Main chain thermotropic liquid crystal esters, ester-imides, and ester-amides were prepared from AA, BB, and AB type monomeric materials and were end-capped with phenylacetylene, phenylmaleimide, or nadimide reactive end-groups. The resulting reactive end-capped liquid crystal oligomers exhibit a variety of improved and preferred physical properties. The end-capped liquid crystal oligomers are thermotropic and have, preferably, molecular weights in the range of approximately 1000-15,000 grams per mole. The end-capped liquid crystal oligomers have broad liquid crystalline melting ranges and exhibit high melt stability and very low melt viscosities at accessible temperatures. The end-capped liquid crystal oligomers are stable for up to an hour in the melt phase.Type: GrantFiled: January 5, 2001Date of Patent: September 6, 2005Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Theodorous J. Dingemans, Erik S. Weiser, Terry L. St. Clair
-
Patent number: 6936312Abstract: A liquid crystal composition comprising a first component consisting of at least one compound selected from a group of compounds represented by Formula (I) and a second component consisting of at least one compound selected from a group of compounds represented by Formulas (II-1) to (II-8): in which each symbols of Formula (I) are defined in the specification and Formulas (II-1) to (II-8) and their symbols are also defined in the specification.Type: GrantFiled: April 9, 2003Date of Patent: August 30, 2005Assignees: Chisso Corporation, Chisso Petrochemical CorporationInventors: Yuzuru Torii, Hitoshi Yamamoto
-
Patent number: 6936186Abstract: A mesomorphic compound having an ionic conductivity is used as an electrolyte for a secondary battery, etc. The mesomorphic compound has a partial structure which includes (a) a mesomorphic mesogen group and (b) two divalent groups. Each of the two divalent groups is directly connected to the mesogen group, and each of the two divalent groups is represented by the following formula: (OCH2CH2)x or (OCH2CH(CH3))y in which x and y are respectively an integer of 3 to 25. The mesomorphic compound may be a polymeric mesomorphic compound.Type: GrantFiled: July 20, 2001Date of Patent: August 30, 2005Assignee: Canon Kabushiki KaishaInventors: Satoshi Igawa, Shinichi Nakamura
-
Patent number: 6933022Abstract: The invention relates to a liquid crystalline medium characterized by containing one or more compounds of general formula (I) and one or more compounds of formula (II), wherein R1, R2, R3, R4 and c have the meanings as cited in Claim No. 1.Type: GrantFiled: April 29, 2002Date of Patent: August 23, 2005Assignee: Merck Patent GmbHInventors: Melanie Klasen-Memmer, Dagmar Klement, Matthias Bremer
-
Patent number: 6929833Abstract: Liquid-crystalline mediums based on a mixture of polar compounds having positive dielectric aniostropy, characterized in that they comprise one or more compounds of the general formula I in which R, A1, Z1, Y and L are as defined herein, are suitable for use in MLC, TN and STN dispalys.Type: GrantFiled: April 4, 2003Date of Patent: August 16, 2005Assignee: Merck Patent GmbHInventors: Kazuaki Tarumi, Brigitte Schuler, Eike Poetsch, Volker Reiffenrath, Yukiomi Tanaka
-
Patent number: 6921560Abstract: A liquid crystal composition having a negative dielectric anisotropy, containing at least one compound selected from the group of compounds represented by Formulas (1-1), (1-2), (1-3) and (1-4) as a first component: wherein R5 is alkyl or alkenyl; R2 is alkyl or alkoxy; A5 is 1,4-phenylene or 2-fluoro-1,4-phenylene; and A6 is 1,4-phenylene, 2-fluoro-1,4-phenylene or 2,3-difluoro-1,4-phenylene.Type: GrantFiled: February 3, 2004Date of Patent: July 26, 2005Assignees: Chisso Petrochemical Corporation, Chisso CorporationInventors: Eiji Okabe, Yoshitaka Tomi, Masayuki Saito, Hitoshi Yamamoto
-
Patent number: 6919108Abstract: A liquid crystal composition containing at least one compound selected from compounds of formula (1) and formula (2) as a first component, at least one compound selected from compounds of formula (3) as a second component, and at least one compound selected from compounds of formula (4) as a third component: wherein R1 is alkyl; R2 is alkyl or alkenyl; Z1 and Z2 are independently a single bond or —(CH2)2—; X1 is hydrogen or fluorine; and Y1 is fluorine or —OCF3. Also provided is a liquid crystal display element containing the composition.Type: GrantFiled: December 3, 2003Date of Patent: July 19, 2005Assignees: Chisso Petrochemical Corporation, Chisso CorporationInventors: Yoshitaka Tomi, Eiji Okabe
-
Patent number: 6908645Abstract: The invention relates to liquid-crystalline compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds, characterized in that it comprises one or more compounds of the general formula I in which R1, L1, L2, L3, L4, L5, L6, Z1, Z2, X, v and u are as defined in claim 1.Type: GrantFiled: September 30, 2003Date of Patent: June 21, 2005Assignee: Merck Patent GmbHInventors: Peer Kirsch, Marc Lenges, Michael Heckmeier