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US 2004/0135117 A1Published application
Dichroic dye, composition thereof, and liquid crystal composition and liquid crystal display element containing the same
AssigneeIndustrial Technology Research Institute
InventorsShih-Hsien Liu, Yang-Chu Lin, Woan-Shiow Tzeng, Jie-Hwa Ma, Kung-Lung Cheng, Long-Li Lai
Life of this patent
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Abstract
Dichroic dyes, dichroic dye compositions, and liquid crystal composition and liquid crystal display element containing the dichroic dyes. The dichroic dye has increased solubility and stability.
Claims28
A compound having formula (I):
- 20
- wherein
- A is
- 21
- B is —COOR2 or —CHC(CN)COOR4 and X and Y are both hydrogen when A is
- 22
- wherein R1, R2, and R4 are each independently a C1-10 alkyl group which may be substituted by one or more fluorine atoms;
- and
- B is —NR6R7 and X and Y are different and X is a C1-4 alkyl group, and Y is Cl, Br, I, a C1-4 alkyl group, —OCH3, or —OC2H5 or X and Y, being the same, are Cl, Br, I, a C1-4 alkyl group, —OCH3, or —OC2H5 when A is
- 23
- wherein R5 is —CH3 or —C2H5, and R6 and R7 are each independently a C1-10 alkyl group, —CH2CH2(CF2)mF,
- 24
- wherein m is an integer of 1 to 10 and R3 is an C1-4 alkyl group.
10 more elements
A compound having formula (V):
- 29
- wherein OR9 is OC4H8F,
- 30
- or
- 31
- wherein n is an integer of 1 to 10.
3 more elements
A composition of dichroic dyes, which includes a compound selected from the group consisting of a compound having formula (I):
- 33
- wherein
- A is
- 34
- B is —COOR2 or —CHC(CN)COOR4 and X and Y are both hydrogen when A is
- 35
- wherein R1, R2, and R4 are each independently a C1-10 alkyl group which may be substituted by one or more fluoride atoms;
- and
- B is —NR6R7 and X and Y are different and X is a C1-4 alkyl group, and Y is Cl, Br, I, a C1-4 alkyl group, —OCH3, or —OC2H5 or X and Y, being the same, are Cl, is Br, I, a C1-4 alkyl group, —OCH3, or —OC2H5 when A is
- 36
- wherein R5 is —CH3 or —C2H5, and R6 and R7 are each independently a C1-10 alkyl group, —CH2CH2(CF2)mF,
- 37
- 38
- wherein m is an integer of 1 to 10 and R3 is an C1-4 alkyl group;
- and a compound having formula (V):
- 39
- wherein OR9 is OC4H8F,
- 40
- or
- 41
- wherein n is an integer of 1 to 10.
18 more elements
Dependencies are inferred from the claim text.