Liquid crystal medium

Abstract

To provide a liquid crystal medium for use in IPS, FFS, VA or PS-VA displays.SOLUTION: The present invention relates to a liquid crystal medium comprising one or more compounds of formula I, and specific two compounds. R11 and R12 are the same or different to represent H, a C1-15 linear alkyl or alkoxy, a C2-15 linear alkenyl or alkenyloxy, or a C3-15 branched alkyl, alkoxy, alkenyl or alkenyloxy; and L1 and L2 are the same or different to represent F or Cl.SELECTED DRAWING: None

Claims

1. a) A liquid crystal medium comprising one or more compounds of formula I, b) one or more compounds of formula IIBa, and c) one or more compounds of formula IIDa. 【Chemistry 1】 (In the formula, R １１ , R １２ This represents a linear alkyl or alkoxy group having the same or different H atoms, 1 to 15 C atoms, a linear alkenyl or alkenyloxy group having 2 to 15 C atoms, or a branched alkyl, alkoxy, alkenyl or alkenyloxy group having 3 to 15 C atoms, provided that one or more CH groups are present in these groups. ２ The group is designed so that the oxygen atoms are not directly bonded to each other. 【Chemistry 2】 -C≡C-, -CF ２ O-, -OCF ２ -, -O-, -CO-O-, or -O-CO- may be substituted for each other independently, and one or more H atoms in the group may be replaced by halogens. L １ , L ２ (These represent F or Cl, either identical or different.) 【Transformation 3】 (In the formula, R ２Ｂ Each represents an alkyl or alkoxy having 1 to 7 carbon atoms, or an alkenyl having 2 to 7 carbon atoms. (O) represents O or a single bond, and v is an integer between 1 and 5. 【Chemistry 4】 (In the formula, R ２Ｄ represents alkyl or alkoxy having 1 to 7 C atoms each, or alkenyl having 2 to 7 C atoms, (O) represents O or a single bond, and v is an integer between 1 and 5.

2. The liquid crystal medium according to claim 1, comprising one or more compounds of formula III. 【Transformation 5】 (In the formula, R ３１ and R ３２ This represents a linear alkyl or alkoxy group having the same or different H atoms, 1 to 15 C atoms, a linear alkenyl or alkenyloxy group having 2 to 15 C atoms, or a branched alkyl, alkoxy, alkenyl or alkenyloxy group having 3 to 15 C atoms, provided that one or more CH groups are present in these groups. ２ The group is designed so that the oxygen atoms are not directly bonded to each other. 【Transformation 6】 -C≡C-, -CF ２ O-, -OCF ２ -, -CH=CH-, -O-, -CO-O-, or -O-CO- may be substituted for each other independently, and one or more H atoms in the group may be replaced by halogens. A ３１ Each of them appeared independently of the others. a) A 1,4-cyclohexylene or 1,4-cyclohexenylene group, with one or two non-adjacent CH groups in the group. ２ The base can be replaced with -O- or -S-. b) A 1,4-phenylene group, in which one or two CH groups may be replaced by N, or c) A group selected from the group consisting of spiro[3.3]heptane-2,6-diyl, 1,4-bicyclo[2.2.2]octylene, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, phenanthrene-2,7-diyl, and fluorene-2,7-diyl This represents, However, groups a), b), and c) may be monosubstituted or polysubstituted with halogen atoms. Z ３１ In each occurrence, -CO-O-, -O-CO-, and -CF appear independently of each other. ２ O-, -OCF ２ -ien-CH ２ O-, -OCH ２ -ien-CH ２ -ien-CH ２ CH ２ -, - (CH ２ ) ４ -, -CH=CH-CH ２ O-, -C ２ F ４ -ien-CH ２ CF ２ -, -CF ２ CH ２ -, -CF=CF-, -CH=CF-, -CF=CH-, -CH=CH-, -C≡C- or single bond, L ３１ and L ３２ These are F, Cl, and CF, which are independent of each other. ３ or CHF ２ Represents, and n is 0, 1, or 2.

3. The liquid crystal medium according to claim 1, further comprising one or more compounds selected from the group of compounds of formulas IIA, IIB, IIC, and IID. 【Transformation 7】 (In the formula, R ２Ａ , R ２Ｂ , R ２Ｃ and R ２Ｄ This represents a linear alkyl or alkoxy group having the same or different H atoms, 1 to 15 C atoms, a linear alkenyl or alkenyloxy group having 2 to 15 C atoms, or a branched alkyl, alkoxy, alkenyl or alkenyloxy group having 3 to 15 C atoms, provided that one or more CH groups are present in these groups. ２ The group is designed so that the oxygen atoms are not directly bonded to each other. 【Transformation 8】 -C≡C-, -CF ２ O-, -OCF ２ -, -CH=CH-, -O-, -CO-O-, or -O-CO- may be substituted for each other independently, and one or more H atoms in the group may be replaced by halogens. (O) represents oxygen or a single bond. L １ ~L ４ These are F, Cl, and CF, which are independent of each other. ３ or CHF ２ This represents, Y is H, F, Cl, CF ３ CHF ２ or CH ３ This represents, Z ２ Z ２Ｂ and Z ２Ｄ Each of them is independently of the other, with a single bond, -CH ２ CH ２ -, -CH=CH-, -CF ２ O-, -OCF ２ -ien-CH ２ O-, -OCH ２ -, -COO-, -OCO-, -C ２ F ４ -, -CF=CF- or -CH=CHCH ２ Represents O-, p represents 0, 1, or 2. q represents 0 or 1, and v represents an integer from 1 to 6. However, compounds of formulas IIB and IIDa are excluded from formulas IIB and IID.

4. The liquid crystal medium according to claim 1, comprising one or more compounds selected from the group of compounds of formulas I-1 and I-2. 【Chemistry 9】 (In the formula, R １１ and R １２ R independently represents an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, where R １１ and R １２ At least one of them represents an alkenyl having 2 to 6 carbon atoms.

5. A liquid crystal medium according to claim 1, comprising one or more compounds of formula S. 【Chemistry 10】 (In the formula, Ar represents an aromatic or heteroaromatic hydrocarbon group having 4 to 40 carbon atoms; Sp represents the spacer group; R Ｓ H represents an alkyl group having 1 to 12 carbon atoms, or an alkenyl group having 2 to 12 carbon atoms; Z Ｓ is -O-, -C(O)O-, -(CH ２ ) ｚ - or - (CH ２ ) ｚ O- or single bond; HA is, 【Chemistry 11】 It represents; R Ｈ H, O ・ ,CH ３ , OH or OR Ｓ It represents; R Ｓ１ , R Ｓ２ , R Ｓ３ and R Ｓ４ This represents an alkyl group having one to six identical or different carbon atoms; G is either H or R Ｓ or base Z Ｓ - Represents HA; z is an integer from 1 to 6; and q is either 3 or 4.

6. The medium according to claim 5, wherein the total concentration of one or more compounds of formula S is in the range of more than 1000 ppm to 5000 ppm.

7. The medium according to claim 1, comprising one or more compounds of formula IV. 【Chemistry 12】 (In the formula, R ４１ This represents an alkyl group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms, and R ４２ (This represents an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an alkenyl group having 2 to 7 carbon atoms.)

8. A liquid crystal medium according to claim 1, comprising one or more compounds of formula V. 【Chemistry 13】 (In the formula, R ５１ , R ５２ This represents an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, or an alkoxyalkyl group having 2 to 7 carbon atoms, an alkenyl group, or an alkenyloxy group. 【Chemistry 14】 This represents, Z ５１ and Z ５２ each independently represents -CH ２ -CH ２ -, -CH ２ -O-, -CH=CH-, -C≡C-, -COO- or a single bond, and n is either 1 or 2.

9. The medium according to claim 1, comprising a polymerizable compound of formula R. 【Chemistry 15】 (In the formula, P represents a polymerizable group, Sp represents a spacer group or single bond. A １ A ２ represents the same or different aromatic, heteroaromatic, alicyclic, or heterocyclic group, which may include a fused ring, and which is unsubstituted, monosubstituted, or polysubstituted with L. Z １ is -O-, -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O-, -OCH ２ -, -CH ２ O-, -SCH ２ -, -CH ２ S-, -CF ２ O-, -OCF ２ -, -CF ２ S-, -SCF ２ -, -(CH ２ ) ｎ１ -, -CF ２ CH ２ -, -CH ２ CF ２ -, -(CF ２ ) ｎ１ -, -CH=CH-, -CF=CF-, -CH=CF-, -CF=CH-, -C≡C-, -CH=CH-CO-O-, -O-CO-CH=CH-, -CH ２ -CH ２ -CO-O-, -O-CO-CH ２ -CH ２ -, -CR ０ R ００ - or a single bond, R ０ , R ００ This is an alkyl having H or 1 to 12 C atoms. R is H, L, or P-Sp-, L is a linear, branched, or cyclic alkyl group having F, Cl, -CN, P-Sp-, or 1 to 25 C atoms, provided that it includes one or more non-adjacent CH ２ The group may be replaced with -O-, -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O- such that the O and / or S atoms are not directly linked to each other independently, except that one or more H atoms may be replaced with P-Sp-, F, or Cl. z is 0, 1, 2 or 3, and n1 is 1, 2, 3, or 4.

10. An LC display comprising the liquid crystal medium described in claim 1.

11. The display according to claim 10, which is a VA, IPS, FFS, or UB-FFS display.

12. A PSA display comprising a liquid crystal medium according to claim 9, wherein the compound of formula R is polymerized.

13. The display according to claim 12, which is a PS-VA, PS-IPS, PS-FFS, PS-UB-FFS, SA-FFS, or SA-VA display.

14. Use of the liquid crystal medium according to claim 1 for electro-optical purposes.

15. A method for preparing a liquid crystal medium according to claim 1, comprising at least the step of mixing one or more compounds of formula I with one or more compounds of formula IIBa and one or more compounds of formula IIDa.

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