Claims
- 1. A reactive liquid crystal compound of formula IIR′-G′-R″ II whereinat least one of terminal groups R′ and R″ is a reactive group HSW′2C— and the other terminal group of R′ and R″ is an alkyl group of up 15 C atoms which is unsubstituted or substituted by one or more halogens and in which one or more CH2 groups is in each case independently replaced by —O—, —S—, —CO—, —OCO—, —CO—O—, or —O—CO—O— wherein O atoms are not directly linked to one another, or is a reactive group exhibiting one reaction site selected from HOW′2C—, HSW′2C—, HW′N—, a carboxyl group, and O═C—N—, or is a polymerizable reactive group exhibiting two or more reactive sites selected from case independently, H or an alkyl group with 1-5 C atoms,G′ is a rod-like diyl group of the formula —S1—(A5—Z3)m—A6—S2—whereinS1 and S2 are each alkylene groups with 0-20 C atoms which can be linear or branched, it also being possible for one or more CH2 groups to be replaced, in each case independently from each other, by —O—, —CO—, —S— or —NW′— with the proviso that O atoms are not linked directly to one another, A5 and A6 are, independently from each other, a) a cyclohexylene group, wherein one or two non-adjacent CH2 groups may be replaced by O or S atoms, b) an unsubstituted 1,4-phenylene group wherein one to three CH groups may be replaced by —N— or a 1,4-phenylene group which is mono- or polysubstituted by F, Cl and/or CH3, c) a bicyclo(2,2,2)octylene group, a naphthalene-2,6-diyl group, a decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene group, Z3 is, independently from each other, —CO—O—, —O—CO—, —CH2CH2—, —CH2O—, —OCH2—, —C≡C— or a single bond, and m is 1, 2, 3 or 4.
- 2. A compound according to claim 1, wherein at least one of terminal groups R′ and R″ is a reactive group HSW′2C— and the other terminal group of R′ and R′ is an alkyl group of up 15 C atoms which is unsubstituted or substituted by one or more halogens and in which one or more CH2 groups is in each case independently replaced by —O—, —S—, —CO—, —OCO—, —CO—O—, or —O—CO—O— wherein O atoms are not directly linked to one another.
- 3. A compound according to claim 1, wherein each of terminal groups R′ and R″ is a reactive group HSW′2C—.
- 4. A compound according to claim 1, wherein at least one of terminal groups R′ and R″ is HS—CH2—.
- 5. A compound according to claim 1, wherein G′ is of formula (1) or (2):
- 6. A compound according to claim 1, wherein G′ is of the formulae: wherein, Phe is 1,4-phenylene which is unsubstituted or mono-, di- ortrifluorinated, Cyc is 1,4-cyclohexylene, Dio is 1,3-dioxane-2,5-diyl, Pyd is pyridine-2,5-diyl, and Pyr is pyrimidine-2,5-diyl.
- 7. A compound according to claim 1, wherein G′ is of the formulae: wherein, Phe is 1,4-phenylene which is unsubstituted or mono-, di- ortrifluoronated, Cyc is 1,4-cyclohexylene, Dio is 1,3-dioxane-2,5-diyl, Pyd is pyridine-2,5-diyl, and Pyr is pyrimidine-2,5-diyl.
- 8. A compound according to claim 1, wherein, S1 and S2 are each linear or branched alkylene groups with 0-20 C atoms in which one CH2 group is optionally replaced by —O—.
- 9. A compound according to claim 1, wherein Z3 is, in each case independently, —COO—, —OCO—, —CH2CH2— or a single bond.
- 10. A liquid crystal mixture comprising at least two liquid crystal compounds, wherein, at least one of said liquid crystal compounds is a reactive liquid crystal compound according to claim 1.
- 11. A liquid crystal mixture comprising at least two liquid crystal compounds, wherein, at least one of said liquid crystal compounds is a reactive liquid crystal compound according to claim 2.
Priority Claims (1)
Number |
Date |
Country |
Kind |
91/107137 |
Apr 1992 |
EP |
|
Parent Case Info
This application is a Division of Ser. No. 09/008,587 filed Jan. 16, 1998, U.S. Pat. No. 6,042,745 which is a Division of Ser. No. 08/081,280 filed Jun. 25, 1993, U.S. Pat. No. 5,871,665.
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