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1. 发明专利

DD244984A5 未知
公开(公告)号：DD244984A5
公开(公告)日：1987-04-22
申请号：DD28280485
申请日：1985-11-13
申请人： SECR DEFENCE BRIT , STC PLC
发明人： CHAN LAWRENCE K M , COATES DAVID , GEMMEL PETER A , GRAY GEORGE W , LACEY DAVID , TOYNE KENNETH J , YOUNG DANIEL J S
IPC分类号： G02F1/13 , C09K19/12 , C09K19/20 , C09K19/22 , C09K19/30 , C09K19/32 , C09K19/42 , C09K19/46 , C09K19/50 , C09K19/58
摘要： PCT No. PCT/GB85/00512 Sec. 371 Date Aug. 19, 1986 Sec. 102(e) Date Aug. 19, 1986 PCT Filed Nov. 8, 1985 PCT Pub. No. WO86/02938 PCT Pub. Date May 22, 1986.Novel lactic acid derivatives which may be used as a component of a ferroelectric smectic liquid crystal mixture, which derivatives have the general formula: in which R1 is alkyl or alkoxy and R2 is alkyl. Liquid crystalline compositions containing these compounds are also described.

2. 发明专利

CA1120491A LIQUID CRYSTALLINE MATERIALS 未知
公开(公告)号：CA1120491A
公开(公告)日：1982-03-23
申请号：CA284209
申请日：1977-08-05
申请人： SECR DEFENCE BRIT
发明人： COATES DAVID , GRAY GEORGE W , MCDONNELL DAMIEN G
IPC分类号： C07C43/20 , C07C45/46 , C07C51/29 , C07C51/36 , C07C69/75 , C07C69/90 , C07C69/94 , C07C255/50 , C07C255/51 , C07C255/53 , C09K19/00 , C09K19/30 , C09K19/32 , G02F1/13 , H01B3/42 , C07C121/75
摘要： Novel liquid crystal materials which are trans-4-cyclohexane-1-carboxylic acid esters are provided having the general formula; where R is a normal or branched chain alkyl group, which may also contain a chiral centre, containing up to ten carbon atoms and X is selected from the groups: where A is a cyano group , a normal or branched chain alkyl group, which may also contain a chiral centre, containing up to ten carbon atoms or an alkoxy group in which the alkyl group is as defined immediately above, and where Y is a halogen, preferably chlorine, or hydrogen.

3. 发明专利

CA1120490A LIQUID CRYSTAL MATERIALS 未知
公开(公告)号：CA1120490A
公开(公告)日：1982-03-23
申请号：CA284208
申请日：1977-08-05
申请人： SECR DEFENCE BRIT
发明人： COATES DAVID , GRAY GEORGE W
IPC分类号： C07C69/90 , C07C43/20 , C07C45/46 , C07C51/29 , C07C69/773 , C09K19/32 , C09K19/46 , G02F1/13 , C07C69/76 , C09K3/34
摘要： Novel liquid crystal materials are provided having the general formula where A is a 4-alkylphenyl group and B is a 2-(6-alkyl)naphthyl group, or vice versa, wherein the alkyl groups in A and B may be the same or different. These materials have a dielectric animotropy sign change at moderate frequencies, ie in the range 1kHz to 50kHz and are thus useful for twisted nematic device cells of the frequency switching type 1?

4. 发明专利

CA1030750A LIQUID CRYSTAL MATERIALS AND DEVICES 未知
公开(公告)号：CA1030750A
公开(公告)日：1978-05-09
申请号：CA195691
申请日：1974-03-22
申请人： SECR DEFENCE BRIT
发明人： GRAY GEORGE W , HARRISON KENNETH J , HULME DAVID S , RAYNES EDWARD P
IPC分类号： C07C205/06 , C07C205/11 , C07C205/12 , C07C205/35 , C09K19/12 , C09K19/54 , C09K3/34

5. 发明专利

DD227972A5 未知
公开(公告)号：DD227972A5
公开(公告)日：1985-10-02
申请号：DD25965184
申请日：1984-01-26
申请人： SECR DEFENCE BRIT , MERCK PATENT GMBH
发明人： BALKWILL PETER H , BISHOP DAVID I , PEARSON ANDREW D , SAGE IAN C , GRAY GEORGE W , LACEY DAVID , TOYNE KENNETH J , MCDONNELL DAMIEN G
IPC分类号： C07C17/00 , C07C17/26 , C07C25/18 , C07C49/813 , C09K19/30 , C09K19/34

6. 发明专利

CA1060046A LIQUID CRYSTAL MATERIALS AND DEVICES 未知
公开(公告)号：CA1060046A
公开(公告)日：1979-08-07
申请号：CA185385
申请日：1973-11-08
申请人： SECR DEFENCE BRIT
发明人： GRAY GEORGE W , HARRISON KENNETH J
IPC分类号： C07C205/06 , C07C205/11 , C07C205/12 , C07C205/35 , C09K19/12 , C09K19/54 , C07C121/64 , C09K3/34 , G02F1/13
摘要： A liquid crystal material which at least contains a compound having a molecular structure such that the material exhibits a liquid crystal phase, the molecular structure of the compound being selected from one of the following structures: the structure ; a simple ortho-substituted derivative of the structure ; and a derivative of the structure in which a simple bridging group is contained between two of the ortho-positions of the said structure wherein X and Y are different para-substituents of the kind which promote liquid crystal behaviour, the para-substituent X being a group selected from the following list: an alkoxy group having more than one carbon atom; an alkyl group; an acyloxy group; and an alkenyl group; and the para-substituent Y being selected from the following list: a cyano group; a benzene ring substituted in the para-position by a cyano group; and a plurality of directly para-linked benzene rings in which the end ring remote from the substituent X is substituted in the para-position by a cyano group. The material may be the said compound or it may be a multi-component solution or mixture containing it. The liquid crystal material may be nematic, smectic or cholesteric depending on the selection of the substituents X and Y. A device such as a twisted nematic effect device, incorporating the material may be operated at low temperatures. The material does not suffer from significant chemical and/or photochemical decomposition when used in a liquid crystal device.

7. 发明专利

CA1332740C LATERALLY FLUORINATED 4- CYANOPHENYL AND 4'- CYANOBIPHENYL BENSOATES 未知
公开(公告)号：CA1332740C
公开(公告)日：1994-10-25
申请号：CA591980
申请日：1989-02-24
申请人： SECR DEFENCE BRIT
发明人： GRAY GEORGE W , LACEY DAVID , TOYNE KENNETH J , HIRD MICHAEL , MCDONNELL DAMIEN G
IPC分类号： G02F1/13 , C07C69/773 , C07C255/51 , C07C255/55 , C09K19/12 , C09K19/20 , C09K19/46
摘要： LATERALLY FLUORINATED 4- CYANOPHENYL AND 4'- CYANOPHENYL BENZOATES. Novel compounds of formula I: Formula I in which R is R1, R1O or R1COO, where R1 is C1-12 alkyl, n and m are 0 or 1 provided that (n + m) is 0 or 1, each a, b, c and d are independently 0 or 1, provided (a + b + c + d) is not zero, but excluding the case where a and b are O and m is O and one of c or de is O are described, being useful constituents of nematic liquid crystal materials.

8. 发明专利

CA2082798A1 NAPHTHYL ORGANIC COMPOUNDS 未知
公开(公告)号：CA2082798A1
公开(公告)日：1992-09-14
申请号：CA2082798
申请日：1992-03-09
申请人： SECR DEFENCE BRIT
发明人： TOYNE KENNETH J , GOODBY JOHN W , SEED ALEXANDER , GRAY GEORGE W , MCDONNELL DAMIEN G , RAYNES EDWARD P , DAY SALLY E , HARRISON KENNETH J , HIRD MICHAEL
IPC分类号： C07C15/00 , C07C255/52 , C07C255/54 , C07C323/38 , C07C323/62 , C07C331/28 , C07D239/26 , C07D333/20 , C07D333/24 , C07D333/36 , C09K19/12 , C09K19/32 , C09K19/34 , C09K19/42 , G02F1/13 , C07C331/08 , C07D213/30 , C07C255/49 , C07C323/63
摘要： 2082798 9216500 PCTABS00016 Liquid crystal compounds of formula (I) are described, where formula (I) is given as R1 -A-(X)m-(B)n-R2 where A is selected from nathyl, fluorinated naphthyl, brominated naphthyl, B is selected from phenyl, methylated phenyl, brominated phenyl, fluorinated phenyl, thiophene, pyrimidine and pyridine, R1 and R2 are independently selected from alkyl, alkoxy, alkynyl, thioalkyl, Br, CN, SCN, NCS, perfluoroalkyl, perfluoroalkoxy and hydrogen, X is selected from C=C, COO and C=C, m is 0 or 1, n is 0 or 1 where m is 1 and n is 0 where m is 0; provided that where A is naphthyl, n is 1 and m is 0 then B is selected from methylated phenyl, brominated phenyl, thiophene, pyrimidine and pyridine; and further provided that where A is naphthyl, X is C=C, m is 1 and n is 1, then B is selected from thiophene, pyrimidine and pyridine. Also described are liquid crystal compounds suitable for inclusion in devices utilising pretransitional characteristics of liquid crystalline materials in the isotropic phase and described by formula (II): R3-J-(Y)p-(Z)q-R4, where J is selected from nathyl, fluorinated naphthyl, brominated naphthyl, Z is selected from phenyl, methylated phenyl, brominated phenyl, fluorinated phenyl, thiophene, pyrimidine and pyridine, R1 and R2 are independently selected from alkyl, alkoxy, alkynyl, thioalkyl, Br, CN, SCN, NCS, perfluoroalkyl, perfluoroalkoxy and hydrogen, Y is selected from C=C, COO and C=C, p is 0 or 1, q is 0 or 1 where p is 1 and q is 0 where p is 0.

9. 发明专利

DD244351A5 未知
公开(公告)号：DD244351A5
公开(公告)日：1987-04-01
申请号：DD28280385
申请日：1985-11-13
申请人： SECR DEFENCE BRIT , STC PLC
发明人： CHAN LAWRENCE K M , COATES DAVID , GEMMEL PETER A , GRAY GEORGE W , LACEY DAVID , TOYNE KENNETH J , YOUNG DANIEL J ST , BURROW MICHAEL P , BONE MATTHEW FR
IPC分类号： G02F1/13 , C09K19/12 , C09K19/20 , C09K19/22 , C09K19/30 , C09K19/32 , C09K19/42 , C09K19/46 , C09K19/50 , C09K19/58 , C09K19/06
摘要： PCT No. PCT/GB85/00512 Sec. 371 Date Aug. 19, 1986 Sec. 102(e) Date Aug. 19, 1986 PCT Filed Nov. 8, 1985 PCT Pub. No. WO86/02938 PCT Pub. Date May 22, 1986.Novel lactic acid derivatives which may be used as a component of a ferroelectric smectic liquid crystal mixture, which derivatives have the general formula: in which R1 is alkyl or alkoxy and R2 is alkyl. Liquid crystalline compositions containing these compounds are also described.

10. 发明专利

CA1136649A LIQUID CRYSTAL COMPOUNDS AND METERIALS AND DEVICES CONTAINING THEM 未知
公开(公告)号：CA1136649A
公开(公告)日：1982-11-30
申请号：CA333185
申请日：1979-08-03
申请人： SECR DEFENCE BRIT
发明人： GRAY GEORGE W , KELLY STEPHEN M , MCDONNELL DAMIEN G , MOSLEY ALAN
IPC分类号： C07C67/00 , C07C253/00 , C07C255/50 , C07C255/51 , C09K19/00 , C09K19/04 , C09K19/32 , C09K19/44 , G02F1/13 , G09F9/35 , C07C121/52 , C09K3/34
摘要： A novel liquid crystal compound has the molecular structure where R is an alkyl group, which may contain up to 18 carbon atoms and which may be normal or branched and may contain a chiral centre, is a bicyclo (2,2,2) octane ring, is a phenyl ring and CN is a cyano group, n being an integer greater than 0 preferably 1 or 2.

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