C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/105
C09K 19/44 (2006.01)
Patent
CA 1147138
ABSTRACT OF THE DISCLOSURE In accordance with the invention, a liquid crystal composition for multiplexed twisted nematic displays which exists in a nematic mesophase from at least about -20°C to 50°C, comprises: (a) From two to four cyanobiphenyl compounds represented by the formula: Image (1) wherein R is selected from the group consisting of straight chain alkyl groups having two to ten carbon atoms and the propoxy radical and wherein compounds with alkyl groups of 2 to 4 carbons range from approximately 5 to 10% by weight of the total composition and the propoxy compound ranges from approximately 5 to 15% by weight of the total composition, at least one of said compounds having an alkyl group having two to seven carbon atoms and at least one of said compounds having an alkyl group with seven to ten carbon atoms and constituting not less than approximately 25% by weight of the total composition; (b) at least one cyclohexane carboxylate ester compound represented by the formula: Image (2) wherein R1 is selected from the group consisting of straight chain alkyl groups having two to three carbon atoms, and R2 is selected from the group consisting of straight chain alkoxy groups having three to six carbon atoms, and wherein the saturated ring has a trans conformation; and (c) at least one diester compound represented by the formula: Image (3) wherein R3 is selected from the group consisting of straight chain alkyl groups having one to five carbon atoms, R4 is selected from the group consisting of straight chain alkyl groups having four or five carbon atoms, X is H or C1 and wherein Image is either aromatic or saturated with trans conformation.
363682
Borden Ladner Gervais Llp
Kylex Incorporated
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