• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Novel liquid crystals have the formula <IMAGE> wherein two of the rings A, B and C are aromatic and the third is a trans-1,4-disubstituted cyclohexane ring and R is alkyl or alkoxy each of 1 - 12 C-atoms. These compounds are particularly useful as additional components in liquid crystal dielectrics whereby the clear point of the dielectric is raised and the viscosity thereof is not deleteriously affected.
    公开号:SU738516A3
    申请号:SU782565900
    申请日:1978-01-13
    公开日:1980-05-30
    发明作者:Айденшинк Рудольф；КРАУЗЕ Йоахим；Поль Людвиг
    申请人:Мерк Патент Гмбх (Фирма)；
    IPC主号:
    专利说明:

    The table shows the temperature of phase transitions of compounds of general formula I
    Compounds of general formula I are positively anisotropic, have a wide temperature range of the nematic state, and are valuable components of liquid-crystal dielectrics. According to the invention, the introduction of compounds of the formula I into known liquid-crystal dielectrics provides a decrease in viscosity without reducing the temperature range of the nematic state. As known HDDs, for example, nematic substances with positive anisotropy of the classes azoxybenzenes, biphenyls, bases of Shifr, phenyl benzoates, phenyl are used. cyclohexanes, three nuclear pyrimidines
    Example 1
    A. Take, 1 track -4- (4-cyanophenyl) -1-n-propylcyclohexane,
    30.8 -4- (4-cyanophenyl) -1-H-pentylcyclohexane ladder,
    21.1 trans-4- (4-cyanophenyl) -1 k-heptylcyclohexane,
    12.00 4-cyano-4- (trans-4-H-pentylcyclohexyl) bifacil.
    Received indicators.
    -b
    Melting point
    Point of enlightenment, C +72 Viscosity, spz29
    B (comparative)., Take,%: 36,1Trans-4- (4-cyanophenyl) - 1-npropylcyclohexane,
    30, .8 trsn "s-4- (4-cyanophenyl) -npentylcyclohexane,
    21, 1trans-4- (4-cyanophenyl) -H-heptylcyclohexane;
    12.0 2- (4-cyanophenyl) -5- (4-n-penylphenyl) -pyrimidine.
    The following indicators were obtained; Point of enlightenment, C +81. Viscosity, spP .36
    PRI me R 2.
    A. Take,%:
    30.3 4-H-pentyl-4-cyanobiphenyl;
    35.3 4-H-heptyl-4-cyanobiphenyl
    8,2 4-n-heptyloxy-4-cyanobifemla;
    8,2 4-H-heptyloxy-4-cyanobiphenyl;
    18, O 4-diano-4- (- -pentylcyclohexyl) -biphenyl.
    The following indicators were obtained.
    Melting point ° C- 2
    Brightness Point, C + 36
    In ykosti, spz .37
    B (comparative). Take%:
    30.3 4-n-pentyl-4-cyanobiphenyl;
    35.3 4-α-heptyl-4-cyanobiphenyl;
    8,2 4-n-heptyloxy-4-cyanobiphenyl;
    8,2 4-n-heptyloxy-4-cyanobiphenyl
    18.0 2- (4-cyanophenyl) -5- (4-H-pentylphenyl) -pyrimidine.
    The following indicators were obtained.
    Melting point, C
    + 1
    Point of enlightenment, C + 80
    Viscosity sps45
    Example 3., A. Take, g
    52.3 4-H-pentylphenyl ester of anisic acid;
    26.24-ri-pentylphenyl 4-n-hexyl-Xibenzoic acid ester;
    21.5 4-cyano-4- (trs "ns -4-n-heptyl cyclohexyl) -biphenyl.
    The following indicators were obtained. Melting point, ° C + 8
    Point of enlightenment, ° С + 83
    Viscosity, spz50
    5B (comparative). Take%:
    52.34-n-pentylphenyl ester of anisic acid;
    26.2 4-n-hexyldyloxybenzoic acid 4-n-pentylphenyl ester; 021.5 2- (4-cyanophenyl) -5- (4-n-heptylphenyl) -pyrimidine.
    The following indicators were obtained. Melting point, ° C (+) 11
    The point of enlightenment, With (+) 39 5 viscosity, spz59
    Example 4
    A. Take,% t
    37.7trais-4- (4-cyanophenyl) -1-n Q -propylcyclohexane;
    32, 2 trans-4- (4-cyanophenyl) -1-H-pentylcyclohexane;
    22.1 trans-4- (4-cyanophenyl) -1-n-heptylcyclahexane;
    58.0 4-cyano-4- (trans-4-n-methylcyclohexyl) -biphenyl.
    The following indicators were obtained.
    Melting point, ° C- 5
    Point of enlightenment, ° C + 63
    Viscosity, spz24
    B (comparative). Take%:
    37.7 tpc1ns-4- (4-cyanophenyl) -1-n-propylcyclohexane;
    32.2Tpawo-4- (4-cyanophenyl) -1-n-pentylcyclohexane;
    522.1tra "c-4- (4-cia" adhenyl) -l-n-heptylcyclohexane;
    8.0 2- (4-cyanophenyl) -5- (4-m-propyl file) - pyrimidine.
    The following indicators are obtained. 0 Melting point, C + 1
    Point of enlightenment, ° С + 73
    Viscosity, spz32
    P-p and measure 5, A. Take,%:
    ., 33, 6 trans-4- (4-cyanophenyl) -1-n-propylcyclohexane;
    28.7 trony -4- (4-cyanophenyl) -1-n-pintylcyclogexa ana;
    19,7trans-4- (4-cyanophenyl) -1-n-heptylcyclohexane;
    018.0 4-cyano-4- (trans-4-n-octylcyclohexyl) -biphenyl.
    The following indicators were obtained. Melting point, ° C-10
    The point of enlightenment, ° C +77 5 V viscosity, sPz31 B (comparative). %: 33.6 trans-4- (4-cyanophenyl) -1-n-propylcyclohexane; 28.7 tons of -4- (4-cyanophenyl) -l-and-pentilcyclohexane; 19, -4- (4-cyanophenyl) -l-H-hectoplcyclohexan CS; 18.0 2- (4-cyanophenyl) -5- (4-n-heptylfevil) -pyrimidine. The following indicators were obtained, Melting point, CO The point of enlightenment, with +89 Viscosity, cPz41 Example 6. A. Take,%: 9 trans-4- (4-cyanophenyl) -1-np pilcyclohexane; 42trs1ns-4- (4-cyanophenyl) -1-m-p tylcyclohexane; 32 trans-4- (4-cyanophenyl) -1-n-heptylcyclohexane; 17 4-cyano-4- (trans-4-n-pentyl lehexyl) -biphenyl. The product has the following characteristics: Melting point, ° C- 3 Bleaching point, ° C +75 Viscosity, cPs29 Phase hexane temperature B (comparative). %: 9 trans-4- (4-cyanophenyl) -1-H-pro-pilcyclohexane is taken; 42 trans-4- (4-cyclophenyl) -1-n-pentylcyclhexane; 32trans-4- (4-cyanophenyl) -1-n-heptylcyclohexane; 17 2,2- (4-cyanophenyl) -5- (4-n-pentylphenyl) -pyrimidine. The product has the following indicators, Melting point, C + 2 Point of enlightenment, ° C + 83 Viscosity, cPs36 From the above examples, it is clear that known dielectrics containing, as one of the components, derivatives of three nuclear pyrimidine, which provide a wide interval of the nematic state of the railway , have a higher viscosity. Introduction to,. "-,.,.,, HDD instead of derivatives of three nuclear pyrimidine derivatives of hexahydroterphenyl reduces the viscosity (36-59 cP) by 16-33% and at the same time keeps the desired temperature range nematic state and. Some Terphenyl Derivatives
    权利要求:
    Claims (1)
    [1]
    SUMMARY OF THE INVENTION A liquid crystal dielectric for electro-optical purposes based on nematic liquid crystals with 50 positive anisotropy, which is related to the fact that, in order to reduce the intensity, an additional compound of the general formula I 55 is added to it
    CM, (I)
    Where One iZ of cycles A and B is phenyl, the second is a trans -1,4-disubstituted cyclohexane ring;
    R is an alkyl or alkoxy group with 1 to 9 carbon atoms, and the components are taken in the following ratio, wt.%:
    Compound I 1-30
    Nematic liquid crystal with positive anisotropy
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    同族专利:
    公开号 | 公开日
    US4154697A|1979-05-15|
    CH638178A5|1983-09-15|
    JPS5833224B2|1983-07-18|
    FR2377376B1|1983-08-19|
    GB1579202A|1980-11-12|
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    HK32081A|1981-07-17|
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    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2701591A|DE2701591C3|1977-01-15|1977-01-15|Hexahydroterphenyl derivatives and their use in liquid crystalline dielectrics|
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