WO2022218217A1 - 液晶组合物及其液晶显示器件 - Google Patents
液晶组合物及其液晶显示器件 Download PDFInfo
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- WO2022218217A1 WO2022218217A1 PCT/CN2022/085767 CN2022085767W WO2022218217A1 WO 2022218217 A1 WO2022218217 A1 WO 2022218217A1 CN 2022085767 W CN2022085767 W CN 2022085767W WO 2022218217 A1 WO2022218217 A1 WO 2022218217A1
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- carbon atoms
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- 125000004955 1,4-cyclohexylene group Chemical group [H]C1([H])C([H])([H])C([H])([*:1])C([H])([H])C([H])([H])C1([H])[*:2] 0.000 description 1
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- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
- C09K19/3491—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having sulfur as hetero atom
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/542—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/56—Aligning agents
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/542—Macromolecular compounds
- C09K2019/548—Macromolecular compounds stabilizing the alignment; Polymer stabilized alignment
Definitions
- the present invention relates to the field of liquid crystals, in particular to a liquid crystal composition and a liquid crystal display device comprising the liquid crystal composition.
- liquid crystal Display has developed rapidly because of its small size, light weight, low power consumption and excellent display quality, especially in portable electronic information products.
- liquid crystal displays can be divided into PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electrical controlled birefringence), OCB (optically compensated bend), IPS (in-plane switching, coplanar transition), FFS (fringe field switching, fringing field switching), VA (vertical alignment, vertical alignment) and PSA ( polymer stable alignment, polymer stable alignment) and other types.
- PC phase change, phase change
- TN tiltist nematic, twisted nematic
- STN super twisted nematic
- ECB electrically controlled birefringence, electrical controlled birefringence
- OCB optical compensated bend
- IPS in-plane switching, coplanar transition
- the PSA type liquid crystal display mode is to add a small amount (typically ⁇ 1wt%, such as 0.3wt%) of one or more polymerizable compounds into the liquid crystal composition, which can ensure that after the liquid crystal composition is filled into the liquid crystal cell, the With or without voltage applied between the electrodes, the liquid crystal molecules are in-situ polymerized or crosslinked (usually by UV photopolymerization) in a state with an initial orientation, thereby fixing the orientation of the liquid crystal molecules.
- PSA type liquid crystal display elements it is used in various conventional liquid crystal display devices, such as known PSA-VA, PSA-OCB, PSA-IPS, PSA-FFS and PSA-TN type liquid crystal displays .
- a liquid crystal composition containing a polymerizable compound is located between two substrates, each of which is equipped with an electrode structure, or the two electrode structures are placed on only one of the substrates.
- either or both of the two substrates may contain an alignment layer disposed on the substrate or electrode structure (if present) to induce initial alignment of the liquid crystal composition.
- the PSA type liquid crystal display can operate as an active matrix display or a passive matrix display.
- active matrix displays the individual pixels are addressed by integrated non-linear active elements such as transistors, while in the case of passive matrix displays the individual pixels are typically multiplexing method for addressing.
- the polymerizable compound contained in the liquid crystal composition is generally polymerized or crosslinked in situ by UV photopolymerization, wherein the UV photopolymerization is achieved by exposing the liquid crystal composition to UV radiation, And preferably the voltage is applied to the electrode structure at the same time.
- the polymerized or cross-linked polymerizable compounds phase-separate from other compounds in the liquid crystal composition and form a polymer layer on the surface of the substrate, where they cause the liquid crystal molecules to interact with the substrate Pre-tilt angle.
- the polymerization of the polymerizable compound is preferably carried out under the application of voltage; for PSA-IPS type liquid crystal displays, with or without voltage application, Preferably no voltage is applied.
- UV photopolymerization is realized by the following two steps:
- UV1 step the liquid crystal composition is exposed to UV radiation emitted by a radiation source (hereinafter referred to as "light source”) while applying a voltage to the electrode structure to generate a pretilt angle.
- a radiation source hereinafter referred to as "light source”
- More preferred polymerizable compounds should produce a smaller pre-tilt angle in the same time or the same pre-tilt angle in a shorter UV1 radiation time (ie, faster angular velocity) to improve production efficiency, shorten the The tact time and cost reduction in mass production, and at the same time, the faster the angular rate of the polymerizable compound, the more favorable it is for the polymerizable compound to achieve complete polymerization, thereby reducing polymer residues.
- the liquid crystal composition is exposed to UV radiation without applying a voltage to the electrode structure to ensure that any residual polymerizable compounds that did not polymerize during the UV1 step can be thoroughly polymerization.
- the change of the pre-tilt angle should be as small as possible, so as to reduce the display unevenness of the PSA type LCD due to the unevenness of the UV process (uneven external conditions such as light, heat, stress, etc.). average possibility.
- the UV radiation intensity in the UV2 step should be reduced to avoid or reduce negative effects (such as reduced reliability or image sticking).
- polymerizable compounds that remain unreacted may polymerize in an uncontrolled manner after the display is fabricated and image display quality, for example, residual polymerizable compounds may be exposed to ambient UV light or backlighting
- the pre-tilt angle will change, and the transmittance will also change, while in the display area that is not turned on, the pre-tilt angle will change. The angle and transmittance remain constant, creating an "image sticking" effect.
- the liquid crystal display industry has stricter requirements on the display quality of LCD, especially in the TV industry, the size of TV generally increases, and the LCD generation line also increases, and the production process of large-size LCD panels is difficult. also increased significantly. Therefore, how to ensure the display quality is an urgent problem to be solved.
- the continuous development of liquid crystal materials is also one of the solutions.
- the selection of liquid crystal compositions used with polymerizable compounds has become a research hotspot.
- PSA-type liquid crystal displays common problems in the production of PSA-type liquid crystal displays include residue or removal of polymerizable compounds and stability of the pretilt angle.
- a PSA type liquid crystal display after the polymerizable compound is polymerized by applying UV1 radiation and UV2 radiation to generate a pretilt angle, a small amount of unreacted polymerizable compound may polymerize in an uncontrollable manner after the display is fabricated, thereby affecting The quality of the display, for example, residual polymerizable compounds can be polymerized under the influence of UV light from the environment or backlighting, the pretilt angle can change after a number of addressing cycles in the switched-on display area, The transmittance also changes, while the pretilt angle and transmittance remain the same in areas of the display that are not turned on, creating an "image sticking" effect.
- the polymerizable compound is polymerized as completely as possible during the formation of the PSA type liquid crystal display, and the residual polymerizable compound can be reacted in a controlled manner, and the faster the polymerization speed, the more favorable it is to achieve this expectation .
- the variation of the pretilt angle be small after a plurality of address cycles.
- the polymerizable compounds in the prior art generally have high melting points, and exhibit only limited solubility in many existing conventional liquid crystal compositions, and often precipitate out of the liquid crystal compositions.
- the polymerizable compound has the possibility of self-polymerization, which further deteriorates its solubility in the liquid crystal composition. Therefore, it is usually necessary to introduce the polymerizable compound-dissolved liquid crystal composition at low temperature in order to reduce the risk of self-polymerization of the polymerizable compound, which places higher requirements on the solubility of the polymerizable compound in the liquid crystal composition, especially its solubility at low temperatures.
- the purpose of the present invention is to provide a liquid crystal composition, which also has a relatively large dielectric anisotropy while maintaining a proper clearing point, proper optical anisotropy and proper rotational viscosity.
- a further object of the present invention is to provide a liquid crystal display device comprising the above-mentioned liquid crystal composition.
- the present invention provides a liquid crystal composition comprising a polymerizable compound, the liquid crystal composition comprising:
- R 1 represents a straight-chain or branched-chain halogenated or unhalogenated alkyl group containing 1-5 carbon atoms
- R 2 represents -H, halogen, -CN, -Sp 2 -P 2 , or a linear or branched alkyl group containing 1-12 carbon atoms, A straight-chain or branched alkyl group containing 1-12 carbon atoms,
- a means in One or more -CH 2 - in the ring can be replaced by X 1 or X 2 independently, and the single bond in one or more rings can be replaced by a double bond, wherein X 1 represents -O- or -S- , X 2 represents a straight-chain alkyl group containing 1-5 carbon atoms;
- L each independently represents halogen, -CN or -Sp 2 -P 2 ;
- L 1 and L 2 each independently represent -H, halogen, a haloalkyl group containing 1-3 carbon atoms, or a haloalkoxy group containing 1-3 carbon atoms;
- P 1 and P 2 each independently represent a polymerizable group
- Sp 1 and Sp 2 each independently represent a spacer group or a single bond
- X represents -O-, -S-, -CO-, -CF 2 -, -NH- or -NF-;
- r 1 , r 2 and r 3 each independently represent 0, 1, 2 or 3, and when r 1 , r 2 and r 3 each independently represent 2 or 3, L may be the same or different;
- n 1 and n 2 each independently represent 0, 1 or 2, and n 1 +n 2 ⁇ 1, when n 1 represents 2, can be the same or different, when n 2 represents 2, may be the same or different; and
- n 3 represents 0, 1 or 2
- n 4 represents 0 or 1
- the ring can be the same or different
- Z 3 can be the same or different.
- R 1 represents a straight chain alkyl group containing 1-5 carbon atoms, such as -CH 3 , -C 2 H 5 , -C 3 H 7 , -C 4 H 9 , or -C 5 H 11 .
- R 1 in order to obtain a larger absolute value of dielectric anisotropy, a larger K value, a longer low temperature storage time, a smaller surface roughness of the polymer layer, a smaller pretilt angle, faster angular velocity, lower polymer residue, higher VHR, and better pretilt angle stability, R 1 preferably represents —CH 3 .
- each L independently represents -F, -Cl, -CN, or -Sp2 - P2.
- r 1 and r 2 each independently represent 0 or 1.
- Z 1 and Z 2 each independently represent a single bond.
- R 2 represents -Sp 2 -P 2 .
- the compound of general formula I is selected from the group consisting of:
- L' and L" each independently represent -F, -Cl, -CN or -Sp 2 -P 2 .
- the compound of general formula I is selected from the group consisting of compounds of general formula 1-1, compounds of general formula 1-2, compounds of general formula 1-3, compounds of general formula 1-4, and compounds of general formula The group consisting of compounds of 1-8.
- the compound of general formula I in order to obtain a larger absolute value of dielectric anisotropy, a larger K value, a longer low temperature storage time, a smaller surface roughness of the polymer layer, a smaller pretilt angle, faster angular velocity, lower polymer residue, higher VHR and better pre-tilt angle stability, is selected from the compound of general formula I-1, the compound of general formula I-2 The group consisting of compounds, compounds of general formula 1-4 and compounds of general formula 1-8.
- the polymerizable groups involved in the present invention are groups suitable for polymerization reactions (eg, free radical or ionic polymerization, addition polymerization or polycondensation), or groups suitable for addition or condensation on the polymer backbone.
- polymerizable groups each independently mean or -SH; preferably, the “polymerizable groups” each independently represent or -SH; further preferably, the "polymerizable groups” each independently represent
- spacer group is known to those skilled in the art and is described in the literature (eg, Pure Appl. Chem. 2001, 73(5), 888 and C. Tschierske, G. Pelzl, S. Diele, Angew. Chem. 2004, 116, 6340-6368).
- spacer group refers to a flexible group linking the mesogenic group and the polymerizable group in the polymerizable compound.
- Typical spacer groups are for example - ( CH2 ) p1- , - ( CH2CH2O ) q1 - CH2CH2-, -( CH2CH2S ) q1 - CH2CH2-, -(CH 2 CH 2 NH)q 1 -CH 2 CH 2 -, -CR 0 R 00 -(CH 2 ) p1 - or -(SiR 0 R 00 -O)p 1 -, wherein p 1 represents 1- An integer of 12, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, etc., q 1 represents an integer of 1-3, such as 2, and R 0 and R 00 each independently represent- H or a linear or branched alkyl group containing 1-12 carbon atoms, Particularly preferred spacer groups are -(CH 2 )p 1 -, -(CH 2 )p 1 -O-, -(CH 2 )p 1 -O-CO-, -(CH 2 )p
- Sp 1 and Sp 2 both represent a single bond.
- the compound of formula I accounts for 0.001% to 5% by weight of the liquid crystal composition, such as 0.005%, 0.01%, 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, etc.; preferably, the compound of formula I accounts for 0.01%-2% by weight of the liquid crystal composition.
- the representation method that a straight line crosses the ring structure represents that the access bond of the group is at any bondable position of the ring structure.
- L 1 and L 2 each independently represent -F or -Cl.
- both L 1 and L 2 represent -F.
- X represents -O- or -S-.
- R 3 represents a linear or branched alkyl group containing 1-10 carbon atoms, a linear or branched alkoxy group containing 1-9 carbon atoms, Or a straight-chain or branched alkenyl group containing 2-10 carbon atoms; further preferably, R 3 represents a straight-chain or branched alkyl group containing 1-8 carbon atoms, an alkyl group containing 1-7 carbon atoms Straight-chain or branched-chain alkoxy, or straight-chain or branched-chain alkenyl containing 2-8 carbon atoms; still further preferably, R 3 represents a straight-chain or branched-chain containing 1-5 carbon atoms Alkyl, straight or branched alkoxy containing 1 to 4 carbon atoms, or straight or branched alkenyl containing 2 to 5 carbon atoms.
- the compound of general formula II is selected from the group consisting of:
- the compound of general formula II is selected from the group consisting of compounds of general formula II-1, compounds of general formula II-2, compounds of general formula II-3, compounds of general formula II-4, compounds of general formula Compounds of general formula II-5, compounds of general formula II-6, compounds of general formula II-7, compounds of general formula II-8, compounds of general formula II-9, compounds of general formula II-10 and compounds of general formula II- A group of 11 compounds.
- the compound of general formula II in order to obtain a larger absolute value of dielectric anisotropy, a larger K value, a longer low temperature storage time, a smaller surface roughness of the polymer layer, a smaller pretilt angle, faster angular velocity, lower polymer residue, higher VHR and better pre-tilt angle stability, is selected from the compound of general formula II-3, the compound of general formula II-4 The group consisting of compounds, compounds of general formula II-5 and compounds of general formula II-10.
- the compound of general formula II accounts for 0.1%-25% by weight of the liquid crystal composition, such as 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%; preferably, the compound of formula II accounts for the weight of the liquid crystal composition The percentage is 1%-20%.
- liquid crystal compositions of the present invention further comprise at least one compound of general formula M:
- ring ring and ring represent independently in One or more -CH 2 - in the ring may be replaced by -O-, and the single bond in one or more rings may be replaced by a double bond, and wherein At most one of the -Hs may be substituted by halogen;
- the alkenyl group in the present invention is preferably selected from the group represented by any one of formula (V1) to formula (V9), particularly preferably formula (V1), formula (V2), formula (V8) or formula ( V9).
- the groups represented by formula (V1) to formula (V9) are as follows:
- * represents a carbon atom in the bonded ring structure.
- the alkenyloxy group in the present invention is preferably selected from the group represented by any one of formula (OV1) to formula (OV9), particularly preferably formula (OV1), formula (OV2), formula (OV8) or formula (OV9).
- the groups represented by formula (OV1) to formula (OV9) are as follows:
- * represents a carbon atom in the bonded ring structure.
- the compound of general formula M is selected from the group consisting of:
- the compound of general formula M is selected from the group consisting of compounds of general formula M-1, compounds of general formula M-2, compounds of general formula M-6, compounds of general formula M-12, compounds of general formula The group consisting of the compound of general formula M-13, the compound of general formula M-16, the compound of general formula M-19, the compound of general formula M-26 and the compound of general formula M-30.
- the compound of general formula M is selected from the compound of general formula M-1, the compound of general formula M-2 The group consisting of compounds, compounds of general formula M-6 and compounds of general formula M-12.
- the compound of formula M accounts for 0.1%-80% by weight of the liquid crystal composition, such as 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34% , 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66 %, 68%, 70%, 72%, 74%, 76%, 78%, 80%; preferably, the compound of general formula M accounts for 1%-60% by weight of the liquid crystal composition.
- the content of the compound of general formula M must depend on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, drip marks, burn-in, dielectric anisotropy Make appropriate adjustments according to the required performance.
- the lower limit of the content is preferably higher and the upper limit of the content is higher;
- the lower limit of the content and the upper limit of the content are preferably higher;
- the absolute value of the electrical anisotropy it is preferable that the lower limit value of the content be lowered and the upper limit value of the content be lowered.
- R M1 and R M2 each independently represent a linear or branched alkyl group containing 1-10 carbon atoms, a linear or branched alkyl group containing 1-9 carbon atoms chain alkoxy, or straight-chain or branched alkenyl containing 2-10 carbon atoms; further preferably, R M1 and R M2 each independently represent a straight-chain or branched chain containing 1-8 carbon atoms alkyl, straight-chain or branched alkoxy containing 1-7 carbon atoms, or straight-chain or branched alkenyl containing 2-8 carbon atoms; further preferably, R M1 and R M2 Each independently represents a straight-chain or branched alkyl group containing 1-5 carbon atoms, a straight-chain or branched alkoxy group containing 1-4 carbon atoms, or a straight-chain chain containing 2-5 carbon atoms or branched alkenyl.
- R M1 and R M2 each independently represent a straight-chain alkenyl group containing 2-8 carbon atoms; further preferably, R M1 and R M2 each independently represent a linear alkenyl group containing 2 to 8 carbon atoms. - Straight chain alkenyl of 5 carbon atoms.
- either one of R M1 and R M2 is a straight-chain alkenyl group containing 2-5 carbon atoms, and the other is a straight-chain alkenyl group containing 1-5 carbon atoms straight chain alkyl.
- R M1 and R M2 each independently represent a straight-chain alkyl group containing 1-8 carbon atoms, or a straight-chain alkoxy group containing 1-7 carbon atoms ; Further preferably, R M1 and R M2 each independently represent a straight-chain alkyl group containing 1-5 carbon atoms, or a straight-chain alkoxy group containing 1-4 carbon atoms.
- either one of R M1 and R M2 is a straight-chain alkyl group containing 1-5 carbon atoms, and the other is a linear alkyl group containing 1-5 carbon atoms A straight-chain alkyl group, or a straight-chain alkoxy group containing 1-4 carbon atoms; further preferably, both R M1 and R M2 are each independently a straight-chain alkane containing 1-5 carbon atoms base.
- both R M1 and R M2 when emphasis is placed on reliability, it is preferred that both R M1 and R M2 are alkyl; when emphasis is placed on reducing the volatility of the compound, it is preferred that both R M1 and R M2 are alkoxy; When emphasis is placed on viscosity reduction, at least one of R M1 and R M2 is preferably an alkenyl group.
- liquid crystal compositions of the present invention further comprise at least one compound of the general formula N:
- R N1 and R N2 each independently represent a linear or branched alkyl group containing 1 to 12 carbon atoms,
- L N1 and L N2 each independently represent -H, an alkyl group containing 1-3 carbon atoms, or a halogen
- n N1 0, 1, 2 or 3
- n N2 represents 0 or 1
- 0 ⁇ n N1 +n N2 ⁇ 3 wherein when n N1 2 or 3, the ring may be the same or different, and Z N1 may be the same or different.
- the compound of general formula N is selected from the group consisting of:
- the compound of general formula N is selected from the group consisting of compounds of general formula N-1, compounds of general formula N-2, compounds of general formula N-3, compounds of general formula N-5, compounds of general formula The compound of general formula N-6, the compound of general formula N-10, the compound of general formula N-11, the compound of general formula N-12, the compound of general formula N-13, the compound of general formula N-15, the compound of general formula N- The group consisting of the compound of 24 and the compound of general formula N-26.
- the compound of general formula N is selected from the compound of general formula N-2, the compound of general formula N-3 compound, compound of general formula N-5, compound of general formula N-6, compound of general formula N-10, compound of general formula N-11, compound of general formula N-12, compound of general formula N-13, The group consisting of compounds of general formula N-15, compounds of general formula N-24 and compounds of general formula N-26.
- the compound of formula N is selected from compounds of formula N-2 and compounds of formula N-5 A group of compounds.
- the compound of formula N is selected from compounds of formula N-3 and compounds of formula N-6 A group of compounds.
- the compound of formula N is selected from compounds of formula N-10 and compounds of formula N-13 A group of compounds.
- the compound of general formula N accounts for 0.1%-65% by weight of the liquid crystal composition, such as 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34% , 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%; preferably, the general formula N
- the weight percentage of the compound in the liquid crystal composition ranges from 1% to 60%.
- the lower limit value and the upper limit value of the content of the compound of general formula N are lower;
- the lower limit value of the content of the compound of the general formula N is preferably lower and the upper limit value is lower; in addition, in order to When the absolute value of the dielectric anisotropy is increased while keeping the driving voltage low, it is preferable to increase the lower limit value and the upper limit value of the content of the compound of the general formula N higher.
- R N1 and R N2 each independently represent a linear or branched alkyl group containing 1-10 carbon atoms, a linear or branched alkyl group containing 1-9 carbon atoms Chain alkoxy, or straight-chain or branched alkenyl containing 2-10 carbon atoms; further preferably, R N1 and R N2 each independently represent a straight-chain or branched chain containing 1-8 carbon atoms alkyl, straight-chain or branched alkoxy containing 1-7 carbon atoms, or straight-chain or branched alkenyl containing 2-8 carbon atoms; further preferably, R N1 and R N2 Each independently represents a straight-chain or branched alkyl group containing 1-5 carbon atoms, a straight-chain or branched alkoxy group containing 1-4 carbon atoms, or a straight-chain chain containing 2-5 carbon atoms or branched alkenyl.
- liquid crystal composition of the present invention further comprises at least one compound of general formula A-1 and/or general formula A-2:
- R A1 and R A2 each independently represent a linear or branched alkyl group containing 1 to 12 carbon atoms,
- One or more -Hs in can be independently replaced by -F or -Cl respectively;
- L A11 , L A12 , L A13 , L A21 and L A22 each independently represent -H, an alkyl group containing 1-3 carbon atoms or a halogen;
- X A1 and X A2 each independently represent halogen, straight or branched chain haloalkyl or haloalkoxy having 1 to 5 carbon atoms, or straight or branched haloalkene having 2 to 5 carbon atoms or haloalkenyloxy;
- the compound of general formula A-1 is selected from the group consisting of:
- R v and R w each independently represent -CH 2 - or -O-;
- L A11 , L A12 , L A11 ′, L A12 ′, L A14 , L A15 and L A16 each independently represent -H or -F;
- L A13 and L A13 ' each independently represent -H or -CH 3 ;
- X A1 represents -F, -CF 3 or -OCF 3 ;
- v and w each independently represent 0 or 1.
- the compound of general formula A-1 accounts for 0.1%-50% by weight of the liquid crystal composition, such as 0.1%, 1%, 2%, 4%, 6%, 8%, 10% by weight. %, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%.
- the lower limit of the content when the viscosity of the liquid crystal composition of the present invention is kept low and the response speed is fast, it is preferable to make the lower limit of the content slightly lower and the upper limit of the content slightly lower. slightly lower; further, in the case where the clearing point of the liquid crystal composition of the present invention is kept high and the temperature stability is good, it is preferable to make the lower limit value of the content slightly lower and the upper limit value of the content slightly lower; in addition, In order to keep the driving voltage low and to increase the absolute value of the dielectric anisotropy, it is preferable that the lower limit value of the content be slightly higher and the upper limit value of the content be slightly higher.
- the compound of general formula A-2 is selected from the group consisting of:
- L A21 , L A22 , L A23 , L A24 and L A25 each independently represent -H or -F;
- the compound of general formula A-2 accounts for 0.1%-50% by weight of the liquid crystal composition, such as 0.1%, 1%, 2%, 4%, 6%, 8%, 10% by weight. %, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%.
- the lower limit of the content when the viscosity of the liquid crystal composition of the present invention is kept low and the response speed is fast, the lower limit of the content is preferably slightly lower and the upper limit of the content is slightly lower. low; further, in the case where the clearing point of the liquid crystal composition of the present invention is kept high and the temperature stability is good, it is preferable to make the lower limit value of the content slightly lower and the upper limit value of the content slightly lower; in addition, in order to When the absolute value of the dielectric anisotropy is to be increased while keeping the driving voltage low, it is preferable that the lower limit value of the content be slightly higher and the upper limit value of the content be slightly higher.
- liquid crystal compositions of the present invention further comprise at least one compound of formula B
- R B1 and R B2 each independently represent -H, halogen, straight-chain or branched-chain alkyl group containing 1-12 carbon atoms, wherein among the straight-chain or branched-chain alkyl group containing 1-12 carbon atoms
- O- or -O-CO- replacement, and one or more -H in the aforementioned groups may be independently replaced by -F or -Cl, respectively;
- X B represents -O-, -S-, -CO-, -CF 2 -, -NH- or -NF-;
- Y B1 and Y B2 each independently represent -H, halogen, a halogenated or unhalogenated alkyl group containing 1 to 3 carbon atoms, or a halogenated or unhalogenated alkyl group containing 1 to 3 carbon atoms alkoxy;
- the compound of formula B is selected from the group consisting of:
- Y B3 and Y B4 each independently represent -H, -F, -Cl, -CN, -CH 3 or -OCH 3 .
- the compound of formula B accounts for 0.1%-30% by weight of the liquid crystal composition, for example, 0.1%, 1%, 2%, 4%, 6%, 8%, 10% , 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, or 30%.
- R B1 and R B2 each independently represent a linear or branched alkyl group containing 1-10 carbon atoms, a linear or branched alkyl group containing 1-9 carbon atoms chain alkoxy, or straight-chain or branched alkenyl containing 2-10 carbon atoms; further preferably, R B1 and R B2 each independently represent a straight-chain or branched chain containing 1-8 carbon atoms alkyl, straight-chain or branched alkoxy containing 1-7 carbon atoms, or straight-chain or branched alkenyl containing 2-8 carbon atoms; further preferably, R B1 and R B2 Each independently represents a straight-chain or branched alkyl group containing 1-5 carbon atoms, a straight-chain or branched alkoxy group containing 1-4 carbon atoms, or a straight-chain chain containing 2-5 carbon atoms or branched alkenyl.
- the liquid crystal composition of the present invention further comprises at least one self-alignment agent of the general formula SA:
- R S1 represents Sp-P, a linear or branched alkyl group containing 1-12 carbon atoms,
- -H in can be independently replaced by -F or -Cl respectively;
- R S2 represents the anchoring group:
- p 1 or 2
- -Sp d -X 2 can be the same or different
- o means 0 or 1;
- X 1 and X 2 each independently represent -H, -OH, -SH, -NH 2 , -NHR 11 , -NR 11 2 , NHC(O)-R 11 , -OR 11 , -C(O)OH, -CHO or a straight or branched chain halogenated or unhalogenated alkyl group containing 1-12 carbon atoms;
- X 1 and X 2 is selected from -OH, -SH, -NH 2 , -NHR 11 , -C(O)OH or -CHO;
- Sp a , Sp c and Sp d each independently represent a spacer group or a single bond
- ring and ring represent independently in One or more -CH 2 - in the ring may be replaced by -O-, and the single bond in one or more rings may be replaced by a double bond;
- R 0 and R 11 each independently represent a straight-chain or branched alkyl group containing 1-12 carbon atoms
- P represents a polymerizable group
- Sp represents a spacer group or a single bond
- n s1 represents 0 or 1
- n s2 represents 0, 1, 2 or 3, when n s2 represents 2 or 3, can be the same or different;
- p s1 , p s2 , p s3 and p s4 each independently represent 0, 1 or 2, where 1 ⁇ ps1 + ps2 ⁇ 2 ;
- p s5 and p s6 each independently represent 0 or 1;
- the self-aligning agent of formula SA is selected from the group consisting of:
- R S2 represents or -Spa -X 1 .
- R S2 represents -Sp a -X 1 ,
- Sp d' represents a spacer group or a single bond
- X 2 ' represents -H, -OH, -SH, -NH 2 , -NHR 11 , -NR 11 2 , NHC(O)-R 11 , -OR 11 , -C(O)OH, -CHO or containing 1 - a straight-chain or branched-chain halogenated or unhalogenated alkyl group of 12 carbon atoms, wherein R 11 represents a straight-chain or branched-chain alkyl group containing 1 to 12 carbon atoms.
- R S2 is selected from the group consisting of:
- R S2 is bonded by the dotted line to on the ring structure.
- the compound of formula SA accounts for 0.001% to 5% by weight of the liquid crystal composition, such as 0.001%, 0.005%, 0.05%, 0.1%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%, 0.85%, 0.9%, 0.95%, 1.0%, 2%, 3%, 4% or 5%, etc.; preferably, the compound of the general formula SA accounts for 0.1% to 2% by weight of the liquid crystal composition.
- liquid crystal composition of the present invention may also contain usual nematic liquid crystals, smectic liquid crystals, cholesteric liquid crystals, dopants, antioxidants, ultraviolet absorbers, infrared absorbers, polymerizable monomers or Light stabilizers, etc.
- the dopant accounts for 0%-5% by weight of the liquid crystal composition; preferably, the dopant accounts for 0.01%-1% by weight of the liquid crystal composition.
- additives such as antioxidants and light stabilizers used in the liquid crystal composition of the present invention are preferably the following:
- n a positive integer from 1 to 12.
- the light stabilizer is selected from the following light stabilizers:
- the light stabilizer accounts for 0%-5% of the total weight of the liquid crystal composition; preferably, the light stabilizer accounts for 0.01%-1% of the total weight of the liquid crystal composition; more preferably Typically, the light stabilizer accounts for 0.01%-0.1% of the total weight of the liquid crystal composition.
- the polymerizable compound-containing liquid crystal composition of the present invention can be polymerized even in the absence of a polymerization initiator, but may further contain a polymerization initiator in order to promote polymerization.
- the polymerization initiators include benzoin ethers, benzophenones, acetophenones, benzil ketals, acylphosphine oxides, and the like.
- the liquid crystal composition of the present invention can be imparted with liquid crystal alignment ability by polymerization of the polymerizable compound in the liquid crystal composition, and control the amount of transmitted light in the liquid crystal display device by utilizing birefringence in the liquid crystal composition.
- the polymerization method of the polymerizable compound since it is desired that the polymerization proceeds rapidly, a method in which the polymerization is carried out by irradiation with active energy rays such as ultraviolet rays or electron beams is preferable.
- active energy rays such as ultraviolet rays or electron beams
- a polarized light source can be used, or a non-polarized light source can be used.
- at least the substrate on the irradiated surface side must have appropriate transparency with respect to the active energy rays.
- only a specific portion may be polymerized by using a mask during light irradiation, and then the orientation state of the unpolymerized portion may be changed by changing conditions such as electric field, magnetic field, or temperature, and further polymerization may be performed by irradiating active energy rays.
- the temperature at the time of irradiation with active energy rays such as ultraviolet rays or electron beams is preferably a temperature range in which the liquid crystal state of the liquid crystal composition of the present invention is maintained.
- the polymerization is preferably carried out at a temperature close to room temperature (ie, 15-35°C).
- a lamp that generates ultraviolet rays a metal halide lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like can be used.
- the wavelength of the ultraviolet-ray to irradiate it is preferable to irradiate the ultraviolet-ray whose wavelength is outside the absorption wavelength range of a liquid crystal composition, and it is preferable to block and use an ultraviolet-ray as needed.
- the intensity of the irradiated ultraviolet rays is preferably 0.1 mW/cm 2 to 50 mW/cm 2 .
- irradiating ultraviolet rays its intensity can be changed, and the time of irradiating ultraviolet rays is appropriately selected according to the intensity of the irradiated ultraviolet rays, preferably 10s-600s.
- tilt and tilt angle are to be understood as the tilted alignment of liquid crystal molecules with respect to the surface of the liquid crystal cell in a liquid crystal display device (in the present invention, preferably a PSA type liquid crystal display device).
- the tilt angle represents the average angle ( ⁇ 90°) formed between the longitudinal molecular axes of the liquid crystal molecules (liquid crystal misorientation) and the surface of the outer panel of the liquid crystal cell.
- Low values of inclination angles ie, large deviations from 90° correspond to large inclinations.
- the present invention also provides a liquid crystal display device comprising the above liquid crystal composition, preferably a PSA type liquid crystal display device, more preferably, PS-VA, PS-OCB, PS-IPS, PS-FFS, PS-UB-FFS, PS- Positive-VA or PS-TN type liquid crystal display device.
- a PSA type liquid crystal display device preferably, PS-VA, PS-OCB, PS-IPS, PS-FFS, PS-UB-FFS, PS- Positive-VA or PS-TN type liquid crystal display device.
- the liquid crystal composition of the present invention also has a larger absolute value of dielectric anisotropy under the condition of maintaining proper clearing point, proper optical anisotropy and proper rotational viscosity , larger K value, longer storage time at low temperature, smaller surface roughness of polymer layer, smaller pretilt angle, faster angular velocity, lower polymer residue, higher VHR and less Good pre-tilt angle stability enables the liquid crystal display device containing it to have a wider temperature range, better contrast ratio, and better low temperature mutual solubility, which can effectively speed up the production process of PSA type liquid crystal displays and speed up production efficiency. At the same time, it can effectively improve the problems of "image sticking", uneven display and "broken bright spots" existing in the existing PSA type liquid crystal display, and has high practical application value.
- nCCGF n in the code represents the number of C atoms of the left-terminal alkyl group, for example, n is "3", which means that the alkyl group is -C 3 H 7 ;
- C in the code represents 1,4-cyclohexylene, G represents 2-fluoro-1,4-phenylene, and F represents fluorine substituent.
- ⁇ n measured at 25°C using an Abbe refractometer with a sodium lamp (wavelength 589 nm) as the light source.
- ⁇ ⁇ ⁇ - ⁇ ⁇ , where ⁇ ⁇ is the dielectric constant parallel to the molecular axis, ⁇ ⁇ is the dielectric constant perpendicular to the molecular axis, test conditions: 25°C, 1KHz and VA type test box (cell thickness 6 ⁇ m ).
- ⁇ 1 obtained by using the LCM-2 type liquid crystal property evaluation system; test conditions: 25° C., 160V-260V, and a test cell thickness of 20 ⁇ m.
- nematic liquid crystal medium was placed in a glass bottle, stored at -20°C, and the time recorded when crystal precipitation was observed.
- Ra After the liquid crystal composition containing the polymerizable compound is polymerized by UV light, the liquid crystal molecules are washed away, and then the morphology roughness of the polymerized polymer layer is measured using an atomic force microscope (AFM).
- AFM atomic force microscope
- PTA using the crystal rotation method, pour the liquid crystal into a VA-type test box (cell thickness 3.5 ⁇ m), apply a voltage (15V, 60Hz), and irradiate with ultraviolet light UV1 at the same time, so that the polymerizable compound is polymerized to form a pre-tilt angle PTA1, Then continue to irradiate ultraviolet light UV2 to the liquid crystal composition having formed the pre-tilt angle PTA1 to eliminate the polymerizable compound remaining in the state of PTA1. At this time, the pre-tilt angle formed by the polymerizable compound is PTA2.
- the present invention compares the size of the pre-tilt angle formed when UV1 is irradiated for the same time (the smaller the pre-tilt angle, the faster the polymerization speed) or the time required to form the same pre-tilt angle (the shorter the required time, the faster the polymerization speed) to examine the rate of polymerization of polymerizable compounds.
- Polymer residue After applying UV2 for 70min, the liquid crystal eluted from the liquid crystal test cell was detected by high performance liquid chromatography (HPLC), and the content of the polymerizable compound in it was called polymer residue.
- HPLC high performance liquid chromatography
- VHR After applying UV2 for 70min, use TOY06254 type liquid crystal property evaluation system to test, test conditions: 60°C, 5V, 6Hz, VA type test cell with cell thickness of 3.5 ⁇ m.
- the components used in the following examples can be synthesized by known methods or obtained through commercial channels. These synthesis techniques are conventional, and each of the resulting liquid crystal compounds has been tested to meet electronic compound standards.
- the liquid crystal compositions were prepared according to the proportions of the liquid crystal compositions specified in the following examples.
- the preparation of the liquid crystal composition is carried out according to the conventional methods in the art, such as heating, ultrasonic wave, suspension, etc., by mixing according to the proportion.
- the liquid crystal compositions of Host-1, Host-1 and Host-2 were formulated according to the compounds listed in Table 3 and their weight percentages, and were filled between the two substrates of the liquid crystal display for performance testing.
- the polymerizable compounds RM-01, RM-02, RM-03 and RM-1 were respectively added to 100 parts by weight of the liquid crystal composition control Host-1, as comparative examples 1-3, the polymerizable compound RM-01 was added In 100 parts by weight of the liquid crystal composition Host-1, as Comparative Example 4, the polymerizable compounds RM-1 and RM-2 were respectively added to 100 parts by weight of the liquid crystal composition Host-1, as Example 1-2 , the polymerizable compounds RM-1, RM-2, RM-3 and RM-4 were respectively added to 100 parts by weight of the liquid crystal composition Host-2, as Example 3-5, the specific weight parts of the polymerizable compounds And the related performance test results are shown in Table 4 below:
- the liquid crystal composition of the present invention also has a larger intermediary value under the condition of maintaining a proper clearing point, proper optical anisotropy and proper rotational viscosity.
- the liquid crystal compositions of Host-2, Host-3 and Host-4 were formulated according to the compounds listed in Table 5 and their weight percentages, and were filled between the two substrates of the liquid crystal display for performance testing.
- the polymerizable compounds RM-01, RM-02, RM-03 and RM-1 were respectively added to 100 parts by weight of the liquid crystal composition control Host-2.
- the polymerizable compound RM-01 was added In 100 parts by weight of the liquid crystal composition Host-3, as Comparative Example 8, the polymerizable compounds RM-1 and RM-2 were respectively added to 100 parts by weight of the liquid crystal composition Host-3, as Examples 6-7 , the polymerizable compounds RM-1, RM-2, RM-3 and RM-4 were respectively added to 100 parts by weight of the liquid crystal composition Host-4, as Examples 8-10, the specific weight parts of the polymerizable compounds And the related performance test results are shown in Table 6 below:
- the liquid crystal composition of the present invention also has a larger intermediary value under the condition of maintaining a proper clearing point, proper optical anisotropy and proper rotational viscosity.
- the liquid crystal display forms a spontaneous vertical alignment with respect to the substrate surface, and the alignment is stable until the clearing point and the resulting VA cell can be reversely switched.
- Crossed polarizers are required for display switching.
- Alignment is no longer required for VA, PM-VA, PVA, MVA, HT-VA, VA-IPS and other similar display technologies based on the combination of ⁇ 0 and vertical alignment by using additives such as compounds of formula SA-2-1 layer (eg, no PI coating).
- the liquid crystal display forms a spontaneous vertical alignment with respect to the substrate surface, and the alignment is stable until the clearing point and the resulting VA cell can be reversely switched.
- Crossed polarizers are required for display switching.
- Alignment layers are no longer required for VA, PM-VA, PVA, MVA, HT-VA, VA-IPS and other similar display technologies based on the combination of ⁇ 0 and vertical alignment by using additives such as compounds of formula SA-4-1 (eg no PI coating).
- the liquid crystal display forms a spontaneous vertical alignment with respect to the substrate surface, and the alignment is stable until the clearing point and the resulting VA cell can be reversely switched.
- Crossed polarizers are required for display switching.
- Alignment layers are no longer required for VA, PM-VA, PVA, MVA, HT-VA, VA-IPS and other similar display technologies based on the combination of ⁇ 0 and vertical alignment by using additives such as compounds of formula SA-4-2 (eg no PI coating).
- the liquid crystal composition of the present invention also has a large absolute value of dielectric anisotropy, a large K value, Longer low temperature storage time, smaller polymer layer surface roughness, smaller pretilt angle, faster angular velocity, lower polymer residue, higher VHR and better pretilt angle stability , so that the liquid crystal display device containing it has a wider temperature range, better contrast, better low temperature mutual solubility, can effectively speed up the production process of PSA type liquid crystal display, speed up production efficiency, and can effectively improve the existing PSA
- the problems of "image sticking", uneven display and "broken bright spots" in the LCD display have high practical application value.
- the liquid crystal composition of the present invention can be applied to the field of liquid crystal.
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Abstract
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Claims (10)
- 一种液晶组合物,其特征在于,所述液晶组合物包含:至少一种通式I的化合物:至少一种通式II的化合物:其中,R 1表示含有1-5个碳原子的直链或支链的卤代或未卤代的烷基;R 2表示-H、卤素、-CN、-Sp 2-P 2、或含有1-12个碳原子的直链或支链的烷基、 其中所述含有1-12个碳原子的直链或支链的烷基、 中的一个或不相邻的两个以上的-CH 2-能够分别独立地被-CH=CH-、-C≡C-、-O-、-CO-、-CO-O-或-O-CO-替代,一个或更多个-H能够分别独立地被-F或-Cl取代;R 3表示-H、卤素、含有1-12个碳原子的直链或支链的烷基、 其中所述含有1-12个碳原子的直链或支链的烷基中的一个或不相邻的两个以上的-CH 2-能够以-O-不直接相连的方式分别独立地被-CH=CH-、-C≡C-、-O-、-CO-、-CO-O-或-O-CO-替代,并且所述含有1-12个碳原子的直链或支链的烷基、 中的一个或更多个-H可分别独立地被-F或-Cl取代;环 和环 各自独立地表示 其中 中的一个或更多个-CH 2-可被-O-替代,并且一个或更多个环中单键可被双键替代,其中 中的一个或更多个-H可分别独立地被-F、-Cl或-CN取代,并且一个或更多个环中-CH=可被-N=替代;L各自独立地表示卤素、-CN或-Sp 2-P 2;L 1和L 2各自独立地表示-H、卤素、含有1-3个碳原子的卤代烷基、或者含有1-3个碳原子的卤代烷氧基;P 1和P 2各自独立地表示可聚合基团;Sp 1和Sp 2各自独立地表示间隔基团或单键;X表示-O-、-S-、-CO-、-CF 2-、-NH-或-NF-;Z 1和Z 2各自独立地表示-O-、-S-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CH 2O-、-OCH 2-、-CH 2S-、-SCH 2-、-CF 2O-、-OCF 2-、-CF 2S-、-SCF 2-、-(CH 2) n-、-CF 2CH 2-、-CH 2CF 2-、-(CF 2) n-、-CH=CH-、-CF=CF-、-CH=CF-、-CF=CH-、-C≡C-、-CH=CH-CO-O-、-O-CO-CH=CH-、-CH 2CH 2-CO-O-、-O-CO-CH 2CH 2-、-CR 1R 2-或单键,其中,R 1和R 2各自独立地表示-H或含有1-12个碳原子的直链或支链的烷基,并且n表示1-4的整数;Z 3、Z 4和Z 5各自独立地表示单键、-CH 2CH 2-、-CF 2CF 2-、-CO-O-、-O-CO-、-O-CO-O-、-CH=CH-、-CF=CF-、-CH 2O-或-OCH 2-;r 1、r 2和r 3各自独立地表示0、1、2或3,当r 1、r 2和r 3各自独立地表示2或3时,L可以相同或不同;
- 根据权利要求1所述的液晶组合物,其特征在于,所述通式II的化合物选自由如下化合物组成的组:其中,R 3表示-H、卤素、含有1-12个碳原子的直链或支链的烷基、 其中所述含有1-12个碳原子的直链或支链的烷基中的一个或不相邻的两个以上的-CH 2-能够以-O-不直接相连的方式分别独立地被-CH=CH-、-C≡C-、-O-、-CO-、-CO-O-或-O-CO-替代,并且所述含有1-12个碳原子的直链或支链的烷基、 中的一个或更多个-H可分别独立地被-F或-Cl取代;环 和环 各自独立地表示 其中 中的一个或更多个-CH 2-可被-O-替代,并且一个或更多个环中单键可被双键替代,其中 中的一个或更多个-H可分别独立地被-F、-Cl或-CN取代,并且一个或更多个环中-CH=可被-N=替代;以及Z 3和Z 5各自独立地表示单键、-CH 2CH 2-、-CF 2CF 2-、-CO-O-、-O-CO-、-O-CO-O-、-CH=CH-、-CF=CF-、-CH 2O-或-OCH 2-。
- 根据权利要求1所述的液晶组合物,其特征在于,所述液晶组合物还包含至少一种通式M的化合物:其中,R M1和R M2各自独立地表示含有1-12个碳原子的直链或支链的烷基、 其中所述含有1-12个碳原子的直链或支链的烷基中的一个或不相邻的两个以上的-CH 2-可分别独立地被-CH=CH-、-C≡C-、-O-、-CO-、-CO-O-或-O-CO-替代;Z M1和Z M2各自独立地表示单键、-CO-O-、-O-CO-、-CH 2O-、-OCH 2-、-C≡C-、-CH=CH-、-CH 2CH 2-或-(CH 2) 4-;并且
- 根据权利要求1所述的液晶组合物,其特征在于,所述液晶组合物还包含至少一 种通式N的化合物:其中,R N1和R N2各自独立地表示含有1-12个碳原子的直链或支链的烷基、 其中所述含有1-12个碳原子的直链或支链的烷基中的一个或不相邻的两个以上的-CH 2-可分别独立地被-CH=CH-、-C≡C-、-O-、-CO-、-CO-O-或-O-CO-替代;环 和环 各自独立地表示 其中 中的一个或更多个-CH 2-可被-O-替代,并且一个或更多个环中单键可被双键替代,其中 中的一个或更多个-H可分别独立地被-F、-Cl或-CN取代,并且一个或更多个环中-CH=可被-N=替代;Z N1和Z N2各自独立地表示单键、-CO-O-、-O-CO-、-CH 2O-、-OCH 2-、-CH=CH-、-C≡C-、-CH 2CH 2-、-CF 2CF 2-、-(CH 2) 4-、-CF 2O-或-OCF 2-;L N1和L N2各自独立地表示-H、含有1-3个碳原子的烷基或卤素;并且
- 根据权利要求2所述的液晶组合物,其特征在于,所述通式I的化合物占所述液晶组合物的重量百分比为0.001%~5%。
- 根据权利要求3所述的液晶组合物,其特征在于,所述通式II的化合物占所述液晶组合物的重量百分比为0.1%-25%。
- 根据权利要求1所述的液晶组合物,其特征在于,所述液晶组合物还包含至少一种通式SA的自配向剂:其中,R S1表示Sp-P、含有1-12个碳原子的直链或支链的烷基、 其中所述含有1-12个碳原子的直链或支链的烷基中的一个或不相邻的两个以上的-CH 2-可分别独立地被-CH=CH-、-C≡C-、-O-、-CO-、-CO-O-或-O-CO-替代,并且含有1-12个碳 原子的直链或支链的烷基、 中的一个或更多个-H可分别独立地被-F或-Cl取代;p表示1或2,当p表示2时,-Sp d-X 2可以相同或不同;o表示0或1;X 1和X 2各自独立地表示-H、-OH、-SH、-NH 2、-NHR 11、-NR 11 2、NHC(O)-R 11、-OR 11、-C(O)OH、-CHO或含有1-12个碳原子的直链或支链的卤代或未卤代的烷基;其中,X 1和X 2中至少一个选自-OH、-SH、-NH 2、-NHR 11、-C(O)OH或-CHO;Sp a、Sp c和Sp d各自独立地表示间隔基团或单键;Ls各自独立地表示-F、-Cl、-CN、-NO 2、-NCO、-NCS、-OCN、-SCN、-C(O)N(R 0) 2、-C(O)R 0、含有1-12个碳原子的直链或支链的烷基、 其中所述含有1-12个碳原子的直链或支链的烷基中的一个或不相邻的两个以上的-CH 2-可分别独立地被-CH=CH-、-C≡C-、-O-、-CO-、-CO-O-或-O-CO-替代,并且含有1-12个碳原子的直链或支链的烷基、 中的一个或更多个-H可分别独立地被-F取代;R 0和R 11各自独立地表示含有1-12个碳原子的直链或支链的烷基;P表示可聚合基团;Sp表示间隔基团或单键;n s1表示0或1;p s1、p s2、p s3和p s4各自独立地表示0、1或2,其中,1≤p s1+p s2≤2;p s5和p s6各自独立地表示0或1;并且Z 1和Z 2各自独立地表示-O-、-S-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CH 2O-、-OCH 2-、-CH 2S-、-SCH 2-、-CF 2O-、-OCF 2-、-CF 2S-、-SCF 2-、-(CH 2) n-、-CF 2CH 2-、-CH 2CF 2-、-(CF 2) n-、-CH=CH-、-CF=CF-、-CH=CF-、-CF=CH-、-C≡C-、-CH=CH-CO-O-、-O-CO-CH=CH-、-CH 2CH 2-CO-O-、-O-CO-CH 2CH 2-、-CR 1R 2-或单键,其中,R 1和R 2各自独立地表示-H或含有1-12个碳原子的直链或支链的烷基,并且n表示1-4的整数。
- 根据权利要求1-8中任一项所述的液晶组合物,其特征在于,所述液晶组合物还包含至少一种添加剂。
- 一种包含权利要求1-9中任一项所述的液晶组合物的液晶显示器件。
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