초록 ▼

A liquid crystal composition of highly positive dielectric anisotropy comprises a mixture of a substantial fraction of substituted cyanophenylbenzoates and at least one (non-nitrile bearing) substituted phenyl benzoate, which may be a single and/or double ester. The large proportion of cyanophenylbe

A liquid crystal composition of highly positive dielectric anisotropy comprises a mixture of a substantial fraction of substituted cyanophenylbenzoates and at least one (non-nitrile bearing) substituted phenyl benzoate, which may be a single and/or double ester. The large proportion of cyanophenylbenzoates causes the high positive dielectric anisotropy, and the use of a plurality of compounds reduces the melting point by eutectic action, also increasing the mesophase operating temperature range. The use of solely esters ensures high chemical stability, and the mixture is colorless.

대표청구항 ▼

A liquid crystal composition of high positive dielectric anisotropy formed of a mixture of seven nematic liquid compounds, each compound corresponding to a general chemical formula: the mixture consisting of the specific compounds given in the following table as to the specific substituents of each

A liquid crystal composition of high positive dielectric anisotropy formed of a mixture of seven nematic liquid compounds, each compound corresponding to a general chemical formula: the mixture consisting of the specific compounds given in the following table as to the specific substituents of each compound thereof: in which the first five, nitrile-containing, compounds together constitute at least one-half by weight of the entire mixture ________________________________ -COMPOUND NUMBER X Y ________________________________ 1 C5H11 CN 2 C7H15 CN 3 C8H17 CN 4 C6H13O CN 5 C7H15O CN O �4H9OCO OC2H5 7 CH3O C5H11 ________________________________ A liquid crystal composition of high positive dielectric anisotropy formed of: a sub-mixture of a plurality of the group of five nematic liquid compounds, each compound corresponding to a general chemical formula: said sub-mixture consisting of the specific compounds given in the following table as to specific substituents of each compound thereof in which the first four, nitrile-containing, compounds together constitute at least one-half by weight of the sub-mixture and at least one-third by weight of the entire composition: ________________________________ -COMPOUND NUMBER X Y ________________________________ 1 C7H15 CN 2 C8H17 CN 3 C6H13O CN 4 C7H15O CN O �4H9OCO OC2H5 ________________________________ and a double-ester nematic liquid compound having a chemical formula: