# US 9,518,221 B2 · Nematic liquid crystal composition and liquid crystal display device using the same

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- Number: US 9,518,221 B2
- Document ID: US9518221B2
- Status: Granted
- Kind: B2
- Application number: 14/435,318
- Filed: 2013-07-22
- Published: 2015-09-10
- Granted: 2016-12-13
- Earliest claimed: 2013-07-22
- Assignees: DIC Corporation
- Applicants: DIC Corporation
- Inventors: Joji Kawamura
- Web page: https://patentgrep.com/patent/US9518221B2

## CPC

- C09K 19/3068: {chain containing -COO- or -OCO- groups}
- C09K 19/065: {containing one non-condensed unsaturated non-aromatic ring, e.g. cyclohexene ring}
- C09K 19/3066: {in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers}
- C09K 19/44: containing compounds with benzene rings directly linked
- C09K 2019/0459: {the linking chain being a -CF=CF- chain, e.g. 1,2-difluoroethen-1,2-diyl}
- C09K 2019/0466: {the linking chain being a -CF2O- chain}
- C09K 2019/123: {Ph-Ph-Ph}
- C09K 2019/124: {Ph-Ph-Ph-Ph}
- C09K 2019/3004: {Cy-Cy}
- C09K 2019/3019: {Cy-Cy-Ph-Ph}
- C09K 2019/3025: {Cy-Ph-Ph-Ph}
- C09K 2019/3071: {Cy-Cy-COO-Cy}
- C09K 2019/3077: {Cy-Cy-COO-Ph}
- C09K 2019/3078: {Cy-Cy-COO-Ph-Cy}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

The inventor of the present invention has investigated various liquid crystal compounds and various chemical substances and found that the object can be achieved by using a combination of particular liquid crystal compounds, thereby making the present invention. In other words, provided are a liquid crystal composition having positive dielectric anisotropy, comprising compounds represented by formula (26.2) and formula (2.5) and one or more compounds represented by general formula (IV), an active matrix driving-liquid crystal display device using the liquid crystal composition, and a liquid crystal display using the active matrix-driving liquid crystal display device: (In the formula, R41 and R42 each independently represent an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 4 or 5 carbon atoms and X41 and X42 each independently represent a hydrogen atom or a fluorine atom.)

## Claims

### Claim 1

A liquid crystal composition having positive dielectric anisotropy, comprising compounds represented by formula (26.2) and formula (2.5):
and
one or more compounds represented by general formula (IV):
(In the formula, R41 and R42 each independently represent an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 4 or 5 carbon atoms and X41 and X42 each independently represent a hydrogen atom or a fluorine atom),
13% by mass or more of one or more selected from compounds represented by formula (11.1) and formula (11.2):
and
a compound represented by general formula (V-2)
wherein R51 and R52 each independently represent an alkyl group having 1 to 5 carbon atoms, and X51 and X52 each independently represent a fluorine atom or a hydrogen atom.

### Claim 2 (depends on 1)

The liquid crystal composition according to claim 1, further comprising one or more compounds represented by general formula (L):
RL1-BL1-LL1-BL2LL2-BL3OLRL2 (L)
(In the formula, RL1 and RL2 each independently represent an alkyl group having 1 to 8 carbon atoms where one —CH2— or two or more non-adjacent —CH2— in the alkyl group may each independently be substituted with —CH═CH—, —C≡C—, —O—, —CO—, —COO—, or —OCO—,
OL represents 0, 1, 2, or 3,
BL1, BL2, and BL3 each independently represent a group selected from the group consisting of
(a) a 1,4-cyclohexylene group (one —CH2— or two or more non-adjacent —CH2— in this group may each be substituted with —O—) and
(b) a 1,4-phenylene group (one —CH═ or two or more non-adjacent —CH═ in this group may each be substituted with —N═)
where the group (a) and the group (b) may each independently be substituted with a cyano group, a fluorine atom, or a chlorine atom,
LL1 and LL2 each independently represent a single bond, —CH2CH2—, —(CH2)4—, —OCH2—, —CH2O—, —COO—, —OCO—, —OCF2—, —CF2O—, —CH═N—N═CH—, —CH═CH—, —CF═CF—, or —C≡C—, and
when OL represents 2 or 3 and a plurality of LL2 are present, they may be the same or different; when OL represents 2 or 3 and a plurality of BL3 are present, they may be the same or different; however, the compounds represented by formula (2.5) and general formula (IV), general formula (V-2), and compounds represented by formula (11.1) and formula (11.2) are excluded).

### Claim 3 (depends on 1)

The liquid crystal composition according to claim 1, comprising one or more compounds represented by general formula (M):
(In the formula, RM1 represents an alkyl group having 1 to 8 carbon atoms where one —CH2— or two or more non-adjacent —CH2— in the alkyl group may each independently be substituted with —CH═CH—, —C≡C—, —O—, —CO—, —COO—, or —OCO—,
PM represents 0, 1, 2, 3, or 4,
CM1 and CM2 each independently represent a group selected from the group consisting of
(d) a 1,4-cyclohexylene group (one —CH2— or two or more non-adjacent —CH2— in this group may each be substituted with —O— or —S—) and
(e) a 1,4-phenylene group (one —CH═ or two or more non-adjacent —CH═ in this group may each be substituted with —N═)
where the group (d) and the group (e) may each independently be substituted with a cyano group, a fluorine atom, or a chlorine atom,
KM1 and KM2 each independently represent a single bond, —CH2CH2—, —(CH2)4—, —OCH2—, —CH2O—, —OCF2—, —CF2O—, —COO—, —OCO—, or —C≡C—,
when PM represents 2, 3, or 4 and a plurality of KM1 are present, they may be the same or different; and when PM represents 2, 3, or 4 and a plurality of CM2 are present, they may be the same or different,
XM1 and XM3 each independently represent a hydrogen atom, a chlorine atom, or a fluorine atom, and
XM2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group; however, the compound represented by formula (26.2) is excluded).

### Claim 4 (depends on 1)

An active matrix-driving liquid crystal display device using the liquid crystal composition according to claim 1.

### Claim 5 (depends on 4)

A liquid crystal display using the active matrix-driving liquid crystal display device according to claim 4.