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Patent
JNC Corporation and Chisso Petrochemical Corporation | Date: 2012-03-28

A liquid crystal compound having a large refractive index anisotropy, a large dielectric anisotropy, and a low melting point, and a liquid crystal medium having a liquid crystal phase over a wide temperature range, a large refractive index anisotropy, a large dielectric anisotropy, and having an optically isotropic liquid crystal phase, are provided. The present invention is a liquid crystal compound having a chlorobenzene ring, and a liquid crystal medium characterized by containing the liquid crystal compound and a chiral reagent, and exhibiting an optically isotropic liquid crystal phase.


Patent
JNC Corporation and Chisso Petrochemical Corporation | Date: 2011-08-24

The invention is to provide a liquid crystal composition that satisfies at least one of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced between at least two of the characteristics; and is to provide a AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth, wherein the liquid crystal composition includes a specific compound having a large negative dielectric anisotropy and a low minimum temperature as a first component and a specific compound having a large negative dielectric anisotropy, and the liquid crystal display device contains this composition.


Patent
JNC Corporation and Chisso Petrochemical Corporation | Date: 2011-08-24

A liquid crystal medium, which has a liquid crystal phase over a wide temperature range, a large refractive index anisotropy, and a large dielectric anisotropy, and exhibits an optically isotropic liquid crystal phase, is provided. The liquid crystal medium is characterized by containing a liquid crystal compound having four benzene rings and a difluoromethyleneoxy group, and a chiral reagent, and exhibiting an optically isotropic liquid crystal phase.


Patent
JNC Corporation and Chisso Petrochemical Corporation | Date: 2011-10-26

The invention is to provide a liquid crystal composition satisfying at least one of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of the nematic phase, a small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or having a suitable balance regarding at least two of the characteristics; and is to provide an AM device having a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth; wherein the liquid crystal composition includes a specific compound having a large negative dielectric anisotropy and a low minimum temperature as a first component, a specific compound having a small viscosity or a large maximum temperature as a second component and a specific compound having a polymerizable group as a third component, and a liquid crystal display device contains the composition.


Patent
Chisso Petrochemical Corporation and Jnc Corporation | Date: 2014-05-30

The present invention provides a novel organosilicon compound and polysiloxane which are useful as electronic materials, optical materials, coating materials, sealing materials and catalyst carriers and which can be used as additives for improving various physical properties such as flame retardancy, heat resistance, weatherability, light resistance, electric insulating property, a surface characteristic, hardness, a mechanical strength and a chemical resistance of a polymer material. That is, the present invention relates to an organosilicon compound represented by Formula (1) and polysiloxane comprising the above organosilicon compound as a monomer:


Patent
Chisso Corporation and Chisso Petrochemical Corporation | Date: 2011-04-06

The invention provides a liquid crystal compound which has stability to heat, light and so forth, a nematic phase in a wide temperature range, a small viscosity, a large optical anisotropy, and a suitable elastic constant K_(33), and further has a suitable and negative dielectric anisotropy and an excellent compatibility with other liquid crystal compounds. Moreover, the invention provides a liquid crystal composition comprising this liquid crystal compound and a liquid crystal display device containing this liquid crystal composition. A liquid crystal compound represented by formula (a):^(1) and R^(2) are alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons or alkoxy having 1 to 9 carbons; ring A^(1) and ring A^(2) are 1, 4-phenylene or trans-1, 4-cyclohexylene; L^(1) and L^(2) are hydrogen or fluorine, and at least one of L^(1) and L^(2) is fluorine; and Z^(1) and Z^(2) are a single bond, -(CH_(2))_(2)-, -CH=CH-, -CH_(2)O- or -OCH_(2)-.


Patent
Chisso Corporation and Chisso Petrochemical Corporation | Date: 2011-04-11

A liquid crystal compound is to be obtained that has stability to heat, light and so forth, a high clearing point, a suitable optical anisotropy, a large negative dielectric anisotropy, and excellent compatibility with other liquid crystal compounds. A liquid crystal composition containing the compound is also to be obtained that has a low viscosity, a suitable optical anisotropy, a suitable negative dielectric anisotropy, a low threshold voltage, a high maximum temperature of a nematic phase (phase transition temperature from a nematic phase to an isotropic phase), and a low minimum temperature of a nematic phase. A compound having a hydrocoumarin skeleton is synthesized, and a liquid crystal composition containing the compound is produced.


Patent
Chisso Petrochemical Corporation and Chisso Corporation | Date: 2011-03-28

The invention is to provide a liquid crystal composition that satisfies at least one of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, a large specific resistance, a large elastic constant, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced regarding at least two of the characteristics; and is to provide an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The invention provides a liquid crystal composition that has a nematic phase and includes a specific three-ring compound having a large dielectric anisotropy as a first component and a specific four-ring compound having a high maximum temperature and a large dielectric anisotropy as a second component, and a liquid crystal display device containing the composition.


Patent
Chisso Corporation and Chisso Petrochemical Corporation | Date: 2011-01-12

A liquid crystal compound is provided that has excellent characteristics, such as a negatively large dielectric anisotropy. A liquid crystal composition containing the compound, and a liquid crystal display device containing the composition are also provided. A compound having the three factors, i.e., (1) a tetrahydropyran ring, (2) -CH_(2)O- or -OCH_(2)- and (3)


Patent
Chisso Corporation and Chisso Petrochemical Corporation | Date: 2011-02-16

A liquid crystal compound represented by formula (1), a liqui d crystal composition comprising the compound, and a liquid cryst al display device comprising the composition:^(1) is alkyl having 1 to 20; ring A^(1), ring A^(2) ring A^(3), ringA^(4), ringA^(5), and ringA^(6) are1, 4-cyclohexylene or 1, 4-phenylene; Z^(1) , Z^(2) , Z^(3) , Z^(4) , Z^(5) , and Z^(6) is a single bond; X^(1) is hydrogen or halogen; l, m, n, o, p, and q are 0 or 1, and l+m+n+o+p+q is 3.

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