WO2024125536A1 - 一种自配向剂及其液晶组合物 - Google Patents
一种自配向剂及其液晶组合物 Download PDFInfo
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- WO2024125536A1 WO2024125536A1 PCT/CN2023/138322 CN2023138322W WO2024125536A1 WO 2024125536 A1 WO2024125536 A1 WO 2024125536A1 CN 2023138322 W CN2023138322 W CN 2023138322W WO 2024125536 A1 WO2024125536 A1 WO 2024125536A1
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- 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
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Definitions
- the liquid crystal display element contains a nematic liquid crystal composition, and the liquid crystal composition has appropriate characteristics. By improving the characteristics of the liquid crystal composition, an AM element with good characteristics can be obtained.
- the relationship between the characteristics of the liquid crystal composition and the AM element is summarized in the following Table A.
- the characteristics of the liquid crystal composition are further described based on commercially available AM elements.
- the temperature range of the nematic phase is related to the temperature range of the element.
- the viscosity of the liquid crystal composition is related to the response time of the element. In order to make the element display dynamic images, it is preferred that the response time of the element is shorter.
- the contrast has a critical impact on visual effects. Generally speaking, the greater the contrast, the clearer and more eye-catching the image, and the brighter the color; on the contrary, if the contrast is small, the whole picture will be gray. High contrast is of great help to the clarity, detail and grayscale performance of the image. High-contrast products have advantages in black and white contrast, clarity, integrity and other aspects. Contrast also has a great impact on the display effect of dynamic video. Since the light and dark conversion in dynamic images is relatively fast, the higher the contrast, the easier it is for the human eye to distinguish such a conversion process.
- the PSA type liquid crystal display mode is to add a small amount (for example, 0.3wt%, more typically, ⁇ 1wt%) of one or more polymerizable compounds to the liquid crystal composition, which can ensure that after the liquid crystal composition is filled into the liquid crystal box, the liquid crystal molecules are polymerized in situ (usually by UV light polymerization) or cross-linked in a state with an initial orientation when a voltage is applied between the electrodes or when no voltage is applied, thereby fixing the orientation of the liquid crystal molecules.
- PSA type liquid crystal display elements they are applied to various traditional liquid crystal display devices, such as the known PSA-VA, PSA-OCB, PSA-IPS, PSA-FFS and PSA-TN type liquid crystal displays.
- the polymerizable compounds contained in the liquid crystal composition are usually polymerized or crosslinked in situ by UV photopolymerization, wherein the UV photopolymerization is achieved by exposing the liquid crystal composition to UV radiation (preferably, while applying a voltage to the electrode structure).
- UV photopolymerization is achieved by exposing the liquid crystal composition to UV radiation (preferably, while applying a voltage to the electrode structure).
- the polymerized or crosslinked polymerizable compounds are phase separated from other compounds in the liquid crystal composition and form a polymer layer on the surface of the substrate, where they cause a pre-tilt angle of the liquid crystal molecules relative to the substrate.
- the liquid crystal composition is exposed to UV radiation emitted by a radiation source (hereinafter referred to as “UV1 radiation”), and a voltage is applied to the electrode structure at the same time, thereby generating a pre-tilt angle.
- UV radiation a radiation source
- the more preferred polymerizable compound should generate a smaller pre-tilt angle in the same time or generate the same pre-tilt angle in a shorter UV1 radiation time (i.e., a faster angular velocity) to improve production efficiency, shorten the tact time in mass production, and reduce costs; at the same time, the faster the angular velocity of the polymerizable compound, the more conducive it is to achieve complete polymerization of the polymerizable compound, thereby reducing polymer residue.
- VHR Voltage Holding Ratio
- UV step the liquid crystal composition is exposed to UV radiation (hereinafter referred to as "UV2 radiation") without applying voltage to the electrode structure to ensure that the residual polymerizable compound that has not been polymerized in the UV1 step can be completely polymerized.
- UV2 radiation UV radiation
- the change in the pre-tilt angle is as small as possible to reduce the possibility of uneven display caused by the non-uniformity of the UV process (non-uniform external conditions such as light, heat, stress, etc.) of the PSA type liquid crystal display.
- the intensity of UV radiation in the UV2 step should be reduced to avoid or reduce negative effects (such as reduced reliability or image stickiness).
- PI alignment layer In the current production of PSA-type liquid crystal displays, a polyimide (PI) alignment layer (PI alignment layer for short) needs to be coated on the glass substrate to achieve vertical alignment of liquid crystal molecules.
- this method has obvious shortcomings (such as the PI coating process is cumbersome, complicated, and time-consuming), and there are many other adverse effects, which greatly limits the quality of liquid crystal displays.
- the PI alignment process greatly reduces production efficiency and increases production costs; At the same time, due to the limited ability to accurately control the PI printing area, and the deviation of the PI printing area will affect the sealant sealing of the narrow frame products and the display effect of the edge, it greatly limits the development of the current mainstream narrow frame products and greatly reduces the yield rate of its production.
- the self-aligning agent is mainly added to the liquid crystal composition to replace the use of the PI alignment layer, but not all liquid crystal compositions can be perfectly matched with polymerizable compounds and self-aligning agents.
- the rate of forming the pre-tilt angle in the UV process is too slow, and a longer UV time is required to form the required pre-tilt angle, which reduces production efficiency;
- the polymer and the self-aligning agent have too fast polymerization rates and poor diffusivity during UV polymerization, which is easy to form implosion, resulting in a large roughness of the polymer layer, forming broken bright spots that affect the display effect of the panel; after the UV1 step and the UV2 step, there may be a high concentration of residues of polymerizable compounds and self-aligning agents, causing problems such as worsening of the panel IS (Image Sticking).
- the poor mutual solubility of the liquid crystal composition with the polymerizable compound and the self-aligning agent will lead to the precipitation of the polymerizable compound and the self-aligning agent during the liquid crystal re-storage process, causing the problem of failure of the liquid crystal performance.
- the polymer network formed after the polymerization of the polymerizable compound has poor rigidity, which leads to changes in the structure of the polymer network when the PSA type liquid crystal display element continuously displays the same pattern for a long time, and then changes the pre-tilt angle of the liquid crystal molecules, resulting in poor display.
- the liquid crystal contact angle of the self-aligning agent is too high, which makes the liquid crystal diffuse slowly in the ODF (One Drop Filling) process, resulting in uneven concentration distribution of the self-aligning agent in the panel, which in turn leads to uneven alignment effect or poor alignment effect in the corner area of the panel, resulting in poor display.
- liquid crystal display industry has stricter requirements on the display quality of LCDs, especially in the TV industry.
- LCD generation lines also increase, and the difficulty of manufacturing large-size LCD panels also increases significantly. Therefore, how to ensure display quality is an urgent problem to be solved.
- the development of liquid crystal materials is also one of the solutions.
- the selection of liquid crystal compositions used in combination with polymerizable compounds has become a research hotspot.
- the research focus in this field is to develop self-alignment agents with fast polymerization speed, controllable polymerization process and good comprehensive performance to meet the needs of PSA type liquid crystal display elements, and to provide display technology that can achieve vertical alignment of liquid crystal molecules without the need for a PI alignment layer.
- the purpose of the present invention is to provide a self-aligning agent of general formula O, which, when applied to a liquid crystal composition, can enable the liquid crystal composition containing the self-aligning agent to have a smaller residue concentration, smaller roughness, better alignment effect, better low-temperature storage stability and better pre-tilt angle stability while maintaining an appropriate clearing point , an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33 ) and a smaller rotational viscosity.
- the present invention also aims to provide a liquid crystal composition comprising the self-aligning agent.
- an object of the present invention is to provide a liquid crystal display device comprising the above liquid crystal composition.
- the present invention provides a self-aligning agent of general formula O
- ring express in One or more -CH 2 - in the ring may be replaced by -O-, and one or at most two single bonds in the ring may be replaced by double bonds;
- L o1 and L o3 each independently represent -F, -Cl, -CN, -NO 2 , -NCO, -NCS, -OCN, -SCN, -C(O)N(R o0 ) 2 , -C(O)R o0 , a straight-chain alkyl group having 1 to 12 (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11) carbon atoms, a branched alkyl group having 3 to 12 (e.g., 3, 4, 5, 6, 7, 8, 9, 10, or 11) carbon atoms, A straight chain alkyl containing 1 to 12
- R o1 and R o3 each independently represent an anchoring group, and the anchoring group is in represents the attachment site in the bonded structure;
- n o4 represents 1 or 2, wherein when n o4 represents 2, -Sp o8 -X o2 may be the same or different;
- n o5 means 0 or 1;
- MS1 in Represents the connection site between MS1 and -CH 2 - in the six-membered ring;
- I S1 and J S1 each independently represent -CH 2 -, -O- or -S-;
- X o1 and X o2 each independently represent -H, -OH, -SH, -NH 2 , -NHR 11 , -N(R 11 ) 2 , -NHC(O)R 11 , -OR 11 , -C(O)OH, -CHO, a linear halogenated or unhalogenated alkyl group having 1 to 12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, or a branched halogenated or unhalogenated alkyl group having 3 to 12 (e.g., 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, wherein at least one of X o1 and X o2 is selected from the group consisting of -OH, -SH, -NH 2 , -NHR 11 , -C(O)OH and -CHO, wherein R 11 represents a straight-chain alkyl group containing 1 to 12 (e.g., 1,
- P o1 , P o2 and P o3 each independently represent a polymerizable group
- Sp o1 , Sp o2 , Sp o3 , Sp o4 , Sp o5 , Sp o7 and Sp o8 each independently represent a spacer group or a single bond;
- Sp o6 indicates Among them, ----- indicates the connection site with Sp o7 or Sp o8 ;
- po1 , po2 , po3 and po4 each independently represent 0, 1 or 2, wherein when po1 represents 2, L o1 may be the same or different, wherein when po2 represents 2, L o2 may be the same or different; wherein when po3 represents 2, -Sp o5 -R o3 may be the same or different; wherein when po4 represents 2, L o3 may be the same or different; and
- n o2 represents 0, 1, 2 or 3, and n o3 represents 1, 2 or 3, wherein when n o2 represents 2 or 3, may be the same or different, wherein when n o3 represents 2 or 3, Can be the same or different.
- the self-aligning agent of formula O is selected from the group consisting of the following compounds:
- L o4 to L o7 each independently represent -F, or a halogenated or unhalogenated linear alkyl group having 1 to 5 (eg, 2, 3, or 4) carbon atoms.
- the liquid crystal composition has a smaller residue concentration, a smaller roughness and a better alignment effect, especially when the leftmost ring of the main structure of the self-aligning agent is When the surface is treated with a high-precision laser, it has a smaller residue concentration, smaller roughness and better alignment effect.
- the self-aligning agent of formula O-1 is selected from the group consisting of the following compounds: as well as
- L o31 represents -F, -Cl, -CN, -NO 2 , -NCO, -NCS, -OCN, -SCN, -C(O)N(R o0 ) 2 , -C(O)R o0 , a linear alkyl group having 1 to 12 (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11) carbon atoms, a branched alkyl group having 3 to 12 (e.g., 3, 4, 5, 6, 7, 8, 9, 10, or 11) carbon atoms, A straight chain alkyl containing 1 to 12 carbon atoms
- L o21 means -Sp o3 -P o2 or
- the self-aligning agent of formula O-1 is selected from the group consisting of the following compounds:
- L o22 means -Sp o3 -P o2 or
- R o2 represents -H, a straight-chain alkyl group containing 1 to 12 carbon atoms, a straight-chain alkoxy group containing 1 to 11 carbon atoms, an alkenyl group containing 2 to 12 carbon atoms,
- L o1 , L o3 and L o31 each independently represent -F, -Cl, a linear alkyl group containing 1 to 12 carbon atoms, a linear alkoxy group containing 1 to 11 carbon atoms, a linear alkenyl group containing 2 to 12 carbon atoms,
- the polymerizable groups Po1 , Po2 and Po3 each independently represent or -SH; preferably, the polymerizable groups Po1 , Po2 and Po3 each independently represent or -SH; further preferably, the polymerizable groups Po1 , Po2 and Po3 each independently represent
- L o2 and L o22 each independently represent -Sp o3 -P o2 ,
- Z o2 represents a single bond.
- Sp o1 , Sp o2 , Sp o3 , Sp o4 , Sp o5 , Sp o7 and Sp o8 each independently represent -(CH 2 ) p1 -, -(CH 2 ) p1 -O-, -O-(CH 2 ) p1 -, -(CH 2 ) p1 -O-CO-, -(CH 2 ) p1 -CO-O-, - (CH 2 ) p1 -O-CO-O-, -CR 0 R 00 -(CH 2 ) p1 - or a single bond, wherein p 1 represents an integer of 1-10 (for example, 2, 3, 4, 5, 6, 7, 8 or 9), R 0 and R 00 each independently represent -H, a straight-chain alkyl group containing 1-10 carbon atoms, a branched-chain alkyl group containing 3-10 carbon atoms, or a cycl
- Sp o1 , Sp o3 , Sp o4 and Sp o5 each independently represent -(CH 2 ) p1 - or -(CH 2 ) p1 -O-.
- R o1 and R o3 are each independently selected from the group consisting of: as well as
- * indicates the connection site in the bonded structure.
- R o1 and R o3 are each independently selected from the group consisting of the following groups: as well as
- * indicates the connection site in the bonded structure.
- R o1 and R o3 are each independently preferably:
- * indicates the connection site in the bonded structure.
- the compound of formula O is selected from the group consisting of compounds of formula O-1-2-1, compounds of formula O-1-2-3, and compounds of formula O-1-6-2.
- the self-aligning agent of formula O-1-1-2 is selected from the group consisting of the following compounds:
- the self-aligning agent of formula O-1-2-1 is selected from the group consisting of the following compounds:
- the compound of formula O-1-2-3 is selected from the group consisting of:
- the compound of formula O is selected from the group consisting of compounds of formula O-1-2-1-1, compounds of formula O-1-2-1-11, compounds of formula O-1-2-3-1, compounds of formula O-1-2-3-4, and compounds of formula O-1-6-2.
- Another aspect of the present invention provides a liquid crystal composition comprising a self-aligning agent of general formula O.
- the content of the compound of formula O is preferably adjusted so that the liquid crystal composition of the present invention has less polymer residue, less roughness, and better alignment effect.
- the weight percentage of the compound of general formula O in the liquid crystal composition is 0.001% to 5% (including any value or sub-range between the range), for example, 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%, 5%, or the range between any two values therein; preferably, the weight percentage of the compound of general formula O in the liquid crystal composition is 0.1% to 2%.
- the self-alignment agent of general formula O when added to the liquid crystal composition, enables the liquid crystal composition of the present invention to align the liquid crystal molecules without setting a PI alignment layer, and enables the liquid crystal composition containing it to have a smaller residue concentration, smaller roughness and better alignment effect.
- the liquid crystal composition comprises at least one compound of the general formula M:
- ring ring and ring Each independently expresses in One or more -CH 2 - in the ring may be replaced by -O-, one or at most two single bonds in the ring may be replaced by double bonds, At most one -H in may be replaced by halogen;
- n M 0, 1 or 2
- Z M2 can be the same or different.
- R M1 and R M2 each independently represent a straight-chain alkyl group containing 1-10 carbon atoms, a branched-chain alkyl group containing 3-10 carbon atoms, a straight-chain alkoxy group containing 1-9 carbon atoms, a branched-chain alkoxy group containing 3-9 carbon atoms, a straight-chain alkenyl group containing 2-10 carbon atoms, or a branched-chain alkenyl group containing 4-10 carbon atoms; further preferably, R M1 and R M2 each independently represent a straight-chain alkyl group containing 1-8 carbon atoms, a straight-chain alkoxy group containing 1-7 carbon atoms, or a straight-chain alkenyl group containing 2-8 carbon atoms.
- R M1 and R M2 preferably each independently represent a straight-chain alkenyl group containing 2 to 8 carbon atoms; R M1 and R M2 further preferably each independently represent a straight-chain alkenyl group containing 2 to 5 carbon atoms.
- one of RM1 and RM2 is a straight chain alkenyl group containing 2 to 5 carbon atoms, and the other is a straight chain alkyl group containing 1 to 5 carbon atoms.
- R M1 and R M2 each independently represent a straight-chain alkoxy group containing 1 to 8 carbon atoms; further preferably, R M1 and R M2 each independently represent a straight-chain alkoxy group containing 1 to 5 carbon atoms.
- one of RM1 and RM2 is a straight-chain alkoxy group containing 1 to 5 carbon atoms, and the other is a straight-chain alkyl group containing 1 to 5 carbon atoms.
- the compound of 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-4, compounds of general formula M-11 and compounds of general formula M-13.
- the compound of formula M-1 is selected from the group consisting of the following compounds:
- the compound of formula M-2 is selected from the group consisting of:
- the compound of formula M-11 is selected from the group consisting of:
- the compound of formula M-13 is selected from the group consisting of:
- the compound of formula M comprises at least two compounds selected from the group consisting of compounds of formula M-11-1 and compounds of formula M-13-2.
- the compound of general formula M contains at least one compound selected from the group consisting of compounds of general formula M-1-2, compounds of general formula M-1-5, compounds of general formula M-1-6, compounds of general formula M-11-1, compounds of general formula M-11-3, compounds of general formula M-4, and compounds of general formula M-13-2.
- the content of the compound of the general formula M it is preferred to adjust the content of the compound of the general formula M so that the liquid crystal composition of the present invention has a smaller residue concentration, smaller roughness and better alignment effect while maintaining an appropriate clearing point, an appropriate optical anisotropy, a larger absolute value of dielectric anisotropy, a larger K value and an appropriate rotational viscosity.
- the weight percentage of the compound of formula M in the liquid crystal composition is 0.1%-70% (including any numerical value or sub-range between the range), for example, 0.1%, 1%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66%, 68%, 70%, or the range between any two values.
- the liquid crystal composition further comprises at least one compound of the general formula N:
- L N1 and L N2 each independently represent -H, halogen, or an alkyl group containing 1 to 3 (e.g., 1, 2, or 3) carbon atoms;
- n N1 0, 1, 2 or 3
- n N2 0 or 1
- the ring may be the same or different
- Z N1 may be the same or different;
- n N3 0, 1, 2 or 3.
- L N1 and L N2 both represent -H.
- the compound of formula N is selected from the group consisting of:
- R N11 represents a straight chain alkyl group containing 1 to 5 carbon atoms, One or two or more non-adjacent -CH 2 - groups in a linear alkyl group containing 1 to 5 carbon atoms may be independently replaced by -O-, -CO-, -CO-O- or -O-CO-;
- n N3 0, 1, 2 or 3.
- R N1 and R N2 each independently represent a straight-chain alkyl group containing 1-10 carbon atoms, a branched-chain alkyl group containing 3-10 carbon atoms, a straight-chain alkoxy group containing 1-9 carbon atoms, a branched-chain alkoxy group containing 3-9 carbon atoms, a straight-chain alkenyl group containing 2-10 carbon atoms, or a branched-chain alkyl group containing 3-10 carbon atoms.
- R N1 and R N2 each independently represent a straight-chain alkyl group containing 1 to 8 carbon atoms, a straight-chain alkoxy group containing 1 to 7 carbon atoms, or a straight-chain alkenyl group containing 2 to 8 carbon atoms.
- the compound of general formula N is selected from the group consisting of compounds of general formula N-2, compounds of general formula N-3, compounds of general formula N-7, compounds of general formula N-9, compounds of general formula N-12, compounds of general formula N-15, compounds of general formula N-16, compounds of general formula N-19 and compounds of general formula N-21.
- the compound of general formula N contains at least two (for example, it can be three, four or more) compounds selected from the group consisting of compounds of general formula N-19, compounds of general formula N-21 and compounds of general formula N-23.
- the liquid crystal composition of the present invention has a smaller residue concentration, smaller roughness and better alignment effect while maintaining an appropriate clearing point, an appropriate optical anisotropy, a larger absolute value of dielectric anisotropy, a larger K value and an appropriate rotational viscosity.
- the weight percentage of the compound of general formula N in the liquid crystal composition is 0.1%-70% (including any numerical value or sub-range between this range), for example, 0.1%, 1%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66%, 68%, 70%, or the range between any two values.
- the liquid crystal composition of the present invention comprises at least one compound of formula B:
- R B1 and R B2 each independently represent halogen, a halogenated or unhalogenated straight-chain alkyl group having 1 to 12 (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11) carbon atoms, a halogenated or unhalogenated branched-chain alkyl group having 3 to 12 (e.g., 4, 5, 6, 7, 8, 9, 10, or 11) carbon atoms, wherein the halogenated or unhalogenated straight-chain alkyl group contains 1 to 12 carbon atoms, the halogenated or unhalogenated branched-chain alkyl group contains 3 to 12 carbon atoms,
- X B represents -O-, -S- or -CO-
- L B1 and L B2 each independently represent -H, -F, -Cl, -CF 3 or -OCF 3 ;
- n B1 and n B2 each independently represent 0, 1 or 2, wherein when n B1 represents 2, the ring may be the same or different, wherein when n B2 represents 2, the ring Can be the same or different.
- the compound of formula B is selected from the group consisting of:
- R B1 represents a straight-chain alkyl or alkoxy group containing 1 to 8 carbon atoms, a straight-chain alkenyl or alkenyloxy group containing 2 to 8 carbon atoms;
- X B1 represents -O- or -CH 2 -.
- the compound of general formula B is selected from the group consisting of compounds of general formula B-1, compounds of general formula B-4, compounds of general formula B-5, compounds of general formula B-6, and compounds of general formula B-7.
- the compound of formula B-1 is selected from the group consisting of:
- R B2 ′ represents a straight chain alkyl group containing 1 to 5 carbon atoms
- n B4 represents an integer of 1 to 5 (eg, 1, 2, 3 or 4)
- n B5 represents an integer of 0 to 5 (eg, 1, 2, 3 or 4).
- XB represents -S-.
- the compound of general formula B is selected from the group consisting of compounds of general formula B-1-1, compounds of general formula B-1-4, compounds of general formula B-4, compounds of general formula B-5, compounds of general formula B-6 and compounds of general formula B-7.
- the compound of general formula B comprises at least two (for example, it may be three, four or more) selected from the group consisting of compounds of general formula B-1-1, compounds of general formula B-5, compounds of general formula B-6 and compounds of general formula B-7.
- the content of the compound of formula B is preferably adjusted so that the liquid crystal composition of the present invention has an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33 ), a smaller rotational viscosity, a smaller polymer residue, a smaller roughness, a smaller contact angle, and a better alignment effect.
- the weight percentage of the compound of general formula B in the liquid crystal composition is 0.1%-30% (including any value or sub-range between the range), for example, 0.1%, 1%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, or a range between any two values.
- the liquid crystal composition of the present invention comprises at least one polymerizable compound of the general formula RM:
- P 1 , P 2 and P 3 each independently represent a polymerizable group
- X 0 represents -O-, -S- or -CO-;
- Sp 1 , Sp 2 and Sp 3 each independently represent a spacer group or a single bond
- a 0, 1 or 2
- b 0 or 1 wherein when a represents 2, the ring can be the same or different, and Z1 can be the same or different.
- the polymerizable compound of formula RM is selected from the group consisting of:
- X 1 to X 10 and X 12 each independently represent -F, -Cl, -Sp 3 -P 3 , a linear alkyl or alkoxy group containing 1 to 5 carbon atoms,
- X 1 -X 10 and X 12 each independently represent -F, -Cl, -Sp 3 -P 3 , -CH 3 , or -OCH 3 .
- Sp 1 and Sp 2 both represent a single bond.
- the polymerizable compound of the general formula RM is selected from the group consisting of compounds of the general formula RM-1, RM-2 and a group consisting of compounds of the general formula RM-20.
- the polymerizable groups involved in the present invention are groups suitable for polymerization reactions (e.g., free radical or ionic polymerization, addition polymerization or condensation polymerization), or groups suitable for addition or condensation on the polymer backbone.
- polymerization reactions e.g., free radical or ionic polymerization, addition polymerization or condensation polymerization
- groups suitable for addition or condensation on the polymer backbone e.g., chain polymerization
- the polymerizable groups P 1 , P 2 and P 3 each independently represent or -SH; preferably, the polymerizable groups P 1 , P 2 and P 3 each independently represent or -SH; further preferably, the polymerizable groups P 1 , P 2 and P 3 each independently represent
- the polymerizable compound of formula RM-1 is selected from the group consisting of:
- the polymerizable compound of formula RM-2 is selected from the group consisting of:
- the polymerizable compound of formula RM-19 is selected from the group consisting of:
- the polymerizable compound of formula RM-20 is selected from the group consisting of:
- spacer group is known to those skilled in the art and is described in the literature (e.g., 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 that connects a mesogenic group and a polymerizable group in a polymerizable compound.
- Typical spacer groups are, for example, -(CH 2 ) p1 -, -(CH 2 ) p1 -O-, -O-(CH 2 ) p1 -, -(CH 2 ) p1 -O-CO-, -(CH 2 ) p1 -CO-O-, -(CH 2 ) p1 -O-CO-O-, -(CH 2 CH 2 O) q1 -CH 2 CH 2 -, -(CH 2 CH 2 S) q1 -CH 2 CH 2 - , -(CH 2 CH 2 NH) q1 -CH 2 CH 2 -, -CR 0 R 00 -(CH 2 ) p1 -, or -(SiR 0 R 00 -O) p1 -, wherein p1 represents an integer of 1 to 10 (e.g., 1 , 2 , 3, 4, 5, 6, 7, 8, or 9), q1 represents an integer of
- Particularly preferred spacer groups are -(CH2)p1-, -(CH2)p1 - O- , - ( CH2 ) p1 -O-CO-, -( CH2 ) p1 -CO-O- , -(CH2)p1-O-CO -O-, or -CR0R00- ( CH2 ) p1- .
- the content of the compound of the general formula RM is preferably adjusted so that the liquid crystal composition of the present invention has less polymer residue, less roughness, and better alignment effect.
- the weight percentage of the polymerizable compound of the general formula RM in the liquid crystal composition is 0.001%-5% (including any numerical value or sub-range between the range), for example, 0.001%, 0.002%, 0.004%, 0.005%, 0.006%, 0.008%, 0.01%, 0.02%, 0.04%, 0.06%, 0.08%, 0.1% , 0.2%, 0.25%, 0.26%, 0.27%, 0.28%, 0.29%, 0.3%, 0.32%, 0.33%, 0.34%, 0.35%, 0.4%, 0.5%, 0.6%, 0.8%, 1%, 1.2%, 1.6%, 1.8%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, or a range between any two of the values.
- -CO- and -C(O)- both represent a carbonyl group.
- containing 1-r carbon atoms may mean containing any integer between 1 and r (including the end values 1 and r) carbon atoms, for example, containing 2 carbon atoms, containing (r-1) carbon atoms, or containing r carbon atoms.
- containing 1-12 carbon atoms may mean containing 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12 carbon atoms.
- integer of y1 - y2 can be any integer between the range (including the end values y1 and y2 ).
- integer of 0-12 can be 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12.
- the liquid crystal composition of the present invention further comprises at least one compound selected from the group consisting of compounds of formula A-1 and compounds of formula A-2:
- L A11 , L A12 , L A13 , L A21 and L A22 each independently represent -H, halogen or an alkyl group containing 1 to 3 carbon atoms;
- XA1 and XA2 each independently represent halogen, a haloalkyl or haloalkoxy group containing 1 to 5 carbon atoms, a haloalkenyl or haloalkenyloxy group containing 2 to 5 carbon atoms;
- the weight percentage of the compound selected from the group consisting of the compound of the general formula A-1 and the compound of the general formula A-2 in the liquid crystal composition is 0.1%-60% (including any value between the range), for example, 0.1%, 1%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, or a range between any two of the values.
- the compound of 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 , L A16 , L A17 and L A18 each independently represent -H or -F;
- X A1 represents -F, -CF 3 or -OCF 3 ;
- v and w each independently represent 0 or 1.
- the weight percentage of the compound of general formula A-1 in the liquid crystal composition is 0.1%-50% (including any numerical value or sub-range between the range), for example, 0.1%, 1%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, or a range between any two of the numerical values.
- the compound of formula A-2 is selected from the group consisting of:
- RA2 represents a straight-chain alkyl group containing 1 to 8 carbon atoms
- LA21 , LA22 , LA23 , LA24 and LA25 each independently represent -H or -F;
- the weight percentage of the compound of general formula A-2 in the liquid crystal composition is 0.1%-50% (including any values between the range), for example, 0.1%, 1%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, or a range between any two of the values.
- the liquid crystal composition further comprises at least one additive.
- liquid crystal composition of the present invention may also contain conventional nematic liquid crystals, smectic liquid crystals, cholesteric liquid crystals, dopants, antioxidants, ultraviolet absorbers, infrared absorbers, polymerizable monomers or light stabilizers.
- the weight percentage of the dopant in the liquid crystal composition is 0%-5%; preferably, the weight percentage of the dopant in the liquid crystal composition is 0.01%-1%.
- antioxidants, light stabilizers, ultraviolet absorbers and other additives used in the liquid crystal composition of the present invention are preferably the following:
- n a positive integer from 1 to 12.
- the antioxidant is selected from the compounds shown below:
- n a positive integer from 1 to 12.
- the additive accounts for 0%-5% of the total weight of the liquid crystal composition; preferably, the additive accounts for 0.01%-1% of the total weight of the liquid crystal composition.
- the liquid crystal composition containing a polymerizable compound of the present invention can be polymerized, but in order to promote polymerization, a polymerization initiator may be further contained therein.
- a polymerization initiator examples include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides, and the like.
- the present invention also provides a liquid crystal display device, comprising the liquid crystal composition.
- the above liquid crystal composition is particularly suitable for use in PSA-VA, PSA-OCB, PSA-IPS, PSA-FFS and PSA-TN type liquid crystal display devices.
- the liquid crystal composition comprising the self-aligning agent of the general formula O of the present invention has a smaller residue concentration, smaller roughness, better alignment effect, better low-temperature storage stability and better pre-tilt angle stability while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33 ) and a smaller rotational viscosity.
- nCCGF The structural formula can be expressed as follows: nCCGF, where n in the code represents the number of carbon atoms in the left-hand alkyl group. For example, if n is "3", it 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 a fluorine substituent.
- ⁇ n measured using an Abbe refractometer under a sodium lamp (589 nm) at 20°C.
- ⁇ ⁇ ⁇ - ⁇ ⁇ , where ⁇ ⁇ is the dielectric constant parallel to the molecular axis, and ⁇ ⁇ is the dielectric constant perpendicular to the molecular axis; test conditions: 20° C., 1 KHz, VA type test box with a box thickness of 6 ⁇ m.
- ⁇ 1 measured using LCM-2 liquid crystal property evaluation system; test conditions: 20° C., 160-260 V, test box thickness 20 ⁇ m.
- nematic liquid crystal medium is placed in a glass bottle and stored at -20°C. The time recorded when crystal precipitation is observed, wherein 7D NG means that crystallization is observed after storage at -20°C for 7 days, and 10D OK means that crystallization is still not observed after storage at -20°C for 10 days.
- Ra After a liquid crystal composition containing a polymerizable compound is polymerized by UV light, the liquid crystal molecules are washed away, and then an atomic force microscope (AFM) is used to measure the surface roughness of the polymer layer after polymerization.
- AFM atomic force microscope
- Alignment effect pour liquid crystal containing self-alignment agent and polymerizable compound into a test box with ITO on both sides (without PI layer, box thickness 3.2 ⁇ m), put the test box filled with liquid crystal into a 120°C oven and heat it for 1h, cool the test box to room temperature, put it into a fixture with upper and lower linear polarizers (the transmission axes of the upper and lower polarizers are orthogonal at 90°), and observe the alignment effect of the liquid crystal on the white backlight panel. If it is completely black, it means the alignment effect is good. If there is light leakage in the corners around the test box, the alignment effect is average. If there is light leakage in the middle area of the test box, the alignment effect is poor.
- Residue concentration After applying UV1 (5.5 mw/cm -2 , 313 nm) for 180 s and UV2 (0.25 mw/cm -2 , 313 nm) for 90 min, the liquid crystal eluted from the liquid crystal test box was detected by high performance liquid chromatography (HPLC), and the concentration of polymerizable compounds and self-alignment agents therein was called the residue concentration (ppm).
- HPLC high performance liquid chromatography
- the liquid crystal is poured into a VA type test box (box thickness 3.5 ⁇ m), a voltage (15V, 60Hz) is applied, and ultraviolet light UV1 is used for irradiation at the same time, so that the polymerizable compound is polymerized to form a pre-tilt angle PTA1, and then ultraviolet light UV2 is continuously irradiated to the liquid crystal composition that has formed a pre-tilt angle PTA1 to eliminate the residual polymerizable compound in the PTA1 state. At this time, the pre-tilt angle formed by the polymerizable compound is PTA2.
- the present invention examines the polymerization speed of the polymerizable compound by comparing 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 comparing the time required to form the same pre-tilt angle (the shorter the time required, the faster the polymerization speed).
- ⁇ PTA After the test box used in the pre-tilt angle PTA test has a pre-tilt angle of 88 ⁇ 0.2° through UV1 and UV2 steps, a 60Hz SW wave, a 20V AC voltage and a 2V DC voltage are applied to the test box. After a fixed period of time at 40°C and in the presence of backlight, the pre-tilt angle of the test box is tested.
- ⁇ PTA(165h) PTA (initial) -PTA (165h) . The smaller ⁇ PTA(165h) is, the better the stability of the pre-tilt angle is.
- the self-aligning agent of general formula O provided by the present invention can be prepared by conventional organic synthesis methods, wherein the method of introducing the target terminal group, ring structure and connecting group into the starting material is recorded in the following documents: Organic Synthesis (John Wiley & Sons Inc.), Organic Reactions (John Wiley & Sons Inc.) and Comprehensive Organic Synthesis (Pergamon Press), etc.
- the synthesis method of the linking group in the self-aligning agent of general formula O can refer to the following process, wherein MSG 1 or MSG 2 It is a monovalent organic group having at least one ring.
- a plurality of MSG 1 (or MSG 2 ) used in the following scheme may be the same or different.
- Aryl boronic acid 1 is reacted with compound 2 synthesized by a known method in an aqueous sodium carbonate solution in the presence of a catalyst (e.g., tetrakis(triphenylphosphine)palladium (Pd(PPh 3 ) 4 )) to obtain single bond compound IA.
- a catalyst e.g., tetrakis(triphenylphosphine)palladium (Pd(PPh 3 ) 4 )
- Single bond compound IA can also be prepared by reacting compound 3 synthesized by a known method with n-butyl lithium (n-BuLi), then with zinc chloride, and then with compound 2 in the presence of a catalyst (e.g., dichlorobis(triphenylphosphine)palladium (PdCl 2 (PPh 3 ) 2 )).
- Compound 3 is reacted with n-butyl lithium and then with carbon dioxide to obtain carboxylic acid 4.
- Compound 4 and compound 5 synthesized by a known method are dehydrated in the presence of 1,3-dicyclohexylcarbodiimide (DCC) and 4-dimethylaminopyridine (DMAP) to synthesize compound IB having -CO-O-.
- DCC 1,3-dicyclohexylcarbodiimide
- DMAP 4-dimethylaminopyridine
- a compound having -O-CO- can also be synthesized by this method.
- Compound 6 is obtained by treating Compound IB with a sulfiding agent (such as Lawesson's reagent), and then Compound 6 is fluorinated with hydrogen fluoride-pyridine (HF-Py) and N-bromosuccinimide (NBS) to synthesize Compound IC having -CF 2 O-.
- a sulfiding agent such as Lawesson's reagent
- Compound IE can be prepared by subjecting Compound ID to a hydrogenation reaction using a catalyst such as palladium on carbon (Pd/C).
- a catalyst such as palladium on carbon (Pd/C).
- Compound 7 is reduced using sodium borohydride (NaBH 4 ) to obtain compound 9.
- Compound 9 is then halogenated with hydrobromic acid to obtain compound 10, or the hydroxyl group of compound 9 is protected with p-toluenesulfonic acid (TsOH) to obtain compound 11.
- TsOH p-toluenesulfonic acid
- Compound 10 or compound 11 is then reacted with compound 5 in the presence of potassium carbonate to obtain compound IF.
- Compounds having -OCH 2 - can also be synthesized by these methods.
- Compound IG was prepared by removing the hydrofluoric acid on the terminal chain of compound 11 using a tetrahydrofuran solution of lithium diisopropylamide (LDA).
- LDA lithium diisopropylamide
- the mass-to-charge ratio (m/z) of the compound of formula O-1-2-1-1 is 738.1 (M+), elemental analysis: C, 76.39; H, 8.46; O, 15.16;
- the mixture was recrystallized with 180 mL of a mixed solvent of n-heptane and ethanol (the volume ratio of n-heptane to ethanol was 5:1) to obtain 35.8 g of white crystals of the compound of formula 2-d (2-bromo-4-[2-fluoro-4-(2-pentyl-2,3-dihydro-1H-inden-5-yl)phenyl]-6-methoxyphenol) with a yield of 82%.
- the compound of formula O-1-2-1-15 has an m/z of 852.1 (M+), elemental analysis: C, 71.81; H, 7.21; F, 2.23; O, 18.76;
- each component used in the following examples can be synthesized by a known method or obtained through commercial channels. These synthesis techniques are conventional, and each liquid crystal compound obtained meets the standards of electronic compounds after testing.
- Liquid crystal compositions are prepared according to the ratios of the liquid crystal compositions specified in the following examples.
- the preparation of the liquid crystal compositions is carried out according to conventional methods in the art, such as mixing in proportion by heating, ultrasonic waves, suspension, etc.
- the main liquid crystal compositions of Host-1, Host-2, Host-3, Host-4, Host-5 and Host-6 were prepared according to the compounds listed in Table 4 and their weight percentages, and filled between two substrates of a liquid crystal display for performance testing.
- the obtained liquid crystal compositions were filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of comparative examples 1-3 and embodiments 1-3 are shown in Table 5 below.
- the liquid crystal composition comprising the self-aligning agent of the general formula O of the present invention has a smaller residue concentration (105-118 ppm VS 155-183 ppm), a smaller roughness ( 11.8-12.5 nm VS 15.1-16.4 nm) and a better alignment effect while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33 ) and a smaller rotational viscosity.
- the obtained liquid crystal compositions were filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of comparative examples 4-6 and embodiments 4-6 are shown in Table 6 below.
- the liquid crystal composition comprising the self-aligning agent of the general formula O of the present invention has a smaller residue concentration (113-126ppm VS 168-197ppm), a smaller roughness (11.6-12.3 ppm) and a smaller rotational viscosity while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33 ) and a smaller rotational viscosity. nm VS 15.3-15.9nm) and better orientation effect.
- the obtained liquid crystal compositions were filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of comparative examples 7-9 and embodiments 7-9 are shown in Table 7 below.
- the liquid crystal composition comprising the self-aligning agent of the general formula O of the present invention has a smaller residue concentration (110-123ppm VS 163-189ppm), a smaller roughness ( 11.8-12.4nm VS 15.4-16.1nm ) and a better alignment effect while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K11 and K33) and a smaller rotational viscosity.
- the obtained liquid crystal compositions were filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of comparative examples 10-12 and embodiments 10-12 are shown in Table 8 below.
- the liquid crystal composition containing the self-aligning agent of the general formula O of the present invention maintains an appropriate clearing point, With appropriate optical anisotropy, appropriate absolute value of dielectric anisotropy, larger K value (K 11 and K 33 ) and smaller rotational viscosity, it has smaller residue concentration (126-144ppm VS 189-223ppm), smaller roughness (11.5-12nm VS 14.8-15.6nm) and better alignment effect.
- the liquid crystal compositions of Examples 13-17 were prepared according to the weight fractions of the components described in Table 9, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Examples 13-17 are shown in Table 10 below.
- the liquid crystal composition comprising the self-aligning agent of the general formula O of the present invention has a smaller residue concentration (105-141 ppm), a smaller roughness (11.4-11.8 nm) and a better alignment effect while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33 ) and a smaller rotational viscosity.
- the main liquid crystal compositions of Host-7, Host-8, Host-9, Host-10 and Host-11 were prepared according to the compounds listed in Table 11 and their weight percentages, and filled between two substrates of a liquid crystal display for performance testing.
- the main liquid crystal compositions of Host-12, Host-13, Host-14 and Host-15 were prepared according to the compounds listed in Table 12 and their weight percentages, and filled between two substrates of a liquid crystal display for performance testing.
- the liquid crystal compositions of Comparative Examples 13-15 and Examples 18-22 were prepared according to the weight fractions of the components described in Table 13, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Comparative Examples 13-15 and Examples 18-22 are shown in Table 14 below.
- the liquid crystal composition of the present invention has smaller polymer residue (156-202ppm VS 203-252ppm), smaller roughness (10.9-11.9nm VS 13.8-14.7nm) and better alignment effect while maintaining appropriate clearing point, appropriate optical anisotropy, appropriate absolute value of dielectric anisotropy, larger K value ( K11 and K33 ) and smaller rotational viscosity.
- the liquid crystal compositions of Comparative Examples 16-18 and Examples 23-27 were prepared according to the weight fractions of the components described in Table 15, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Comparative Examples 16-18 and Examples 23-27 are shown in Table 16 below.
- the liquid crystal composition of the present invention has smaller polymer residue (143-183ppm VS 185-238ppm), smaller roughness (10.7-11.6nm VS 13.9-14.8nm) and better alignment effect while maintaining appropriate clearing point, appropriate optical anisotropy, appropriate absolute value of dielectric anisotropy, larger K value ( K11 and K33 ) and smaller rotational viscosity.
- the liquid crystal compositions of Comparative Examples 19-21 and Examples 28-32 were prepared according to the weight fractions of the components described in Table 17, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Comparative Examples 19-21 and Examples 28-32 are shown in Table 18 below.
- the liquid crystal composition of the present invention has smaller polymer residue (135-172ppm VS 175-219ppm), smaller roughness (10.7-11.7nm VS 14.0-14.9nm) and better alignment effect while maintaining appropriate clearing point, appropriate optical anisotropy, appropriate absolute value of dielectric anisotropy, larger K value ( K11 and K33 ) and smaller rotational viscosity.
- the liquid crystal compositions of Comparative Examples 22-24 and Examples 33-37 were prepared according to the weight fractions of the components described in Table 19, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Comparative Examples 22-24 and Examples 33-37 are shown in Table 20 below.
- the liquid crystal composition of the present invention has smaller polymer residue (128-166ppm VS 174-209ppm), smaller roughness (10.6-11.5nm VS 14.2-15.1nm) and better alignment effect while maintaining appropriate clearing point, appropriate optical anisotropy, appropriate absolute value of dielectric anisotropy, larger K value ( K11 and K33 ) and smaller rotational viscosity.
- the liquid crystal compositions of Examples 38-47 were prepared according to the weight fractions of the components described in Table 21, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Examples 38-47 are shown in Table 22 below.
- the liquid crystal composition comprising the self-aligning agent of the general formula O of the present invention has a smaller residue concentration (150-213 ppm), a smaller roughness (11.6-12.7 nm) and a better alignment effect while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33 ) and a smaller rotational viscosity.
- the liquid crystal compositions of Examples 48-57 were prepared according to the weight fractions of the components described in Table 23, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Examples 48-57 are shown in Table 24 below.
- the liquid crystal composition comprising the self-aligning agent of the general formula O of the present invention has a smaller residue concentration (140-184 ppm), a smaller roughness (11.1-12.6 nm) and a better alignment effect while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33 ) and a smaller rotational viscosity.
- liquid crystal compositions of Examples 58-62 were prepared according to the weight fractions of the components described in Table 25, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Examples 58-62 are shown in Table 26 below.
- the liquid crystal composition comprising the self-aligning agent of the general formula O of the present invention has a smaller residue concentration (119-175 ppm), a smaller roughness (10.5-12.5 nm) and a better alignment effect while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33 ) and a smaller rotational viscosity.
- the main liquid crystal compositions of Host-16, Host-17, Host-18, Host-19, Host-20 and Host-21 were prepared according to the compounds listed in Table 27 and their weight percentages, and filled between the two substrates of the liquid crystal display for performance testing.
- the liquid crystal compositions of Comparative Examples 25-27 and Examples 63-66 were prepared according to the weight fractions of the components described in Table 28, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Comparative Examples 25-27 and Examples 63-66 are shown in Table 29 below.
- the liquid crystal composition of the present invention has smaller polymer residue (116-128ppm VS 163-172ppm ), smaller roughness ( 11.7-12.1nm VS 15.2-15.7nm), better low-temperature storage stability (10D OK VS 7-8D NG), better alignment effect, and better pre-tilt angle stability (0.24-0.26 VS 0.35-0.36) while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K11 and K33) and a smaller rotational viscosity.
- the liquid crystal compositions of Comparative Examples 28-30 and Examples 67-70 were prepared according to the weight fractions of the components described in Table 30, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO on both sides).
- the performance test was conducted on the liquid crystal compositions of Comparative Examples 28-30 and Examples 67-70 in Table 31 below.
- the liquid crystal composition of the present invention has smaller polymer residue (117-123ppm VS 168-189ppm), smaller roughness ( 11.8-12.4nm VS 15.4-16.1nm), better low-temperature storage stability (10D OK VS 7-8D NG), better alignment effect, and better pre-tilt angle stability (0.25-0.27 VS 0.35-0.36) while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33) and a smaller rotational viscosity.
- the liquid crystal compositions of Comparative Examples 31-33 and Examples 71-74 were prepared according to the weight fractions of the components described in Table 32, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Comparative Examples 31-33 and Examples 71-74 are shown in Table 33 below.
- the liquid crystal composition of the present invention has smaller polymer residue (105-112 ppm VS 157-159 ppm), smaller roughness (11.2-11.8 nm VS 14.3-14.9 nm), better low-temperature storage stability (10D OK VS 7-8D NG), better alignment effect, and better pre-tilt angle stability ( 0.23-0.24 VS 0.33 ) while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33) and a smaller rotational viscosity.
- the liquid crystal compositions of Comparative Examples 34-36 and Examples 75-78 were prepared according to the weight fractions of the components described in Table 34, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Comparative Examples 34-36 and Examples 75-78 are shown in Table 35 below.
- the liquid crystal composition of the present invention has smaller polymer residue (115-128ppm VS 167-173ppm), smaller roughness ( 12.2-12.5nm VS 15.1-15.8nm), better low-temperature storage stability (10D OK VS 6-8D NG), better alignment effect, and better pre-tilt angle stability (0.24-0.26 VS 0.35-0.36) while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K11 and K33) and a smaller rotational viscosity.
- the liquid crystal compositions of Comparative Examples 37-39 and Examples 79-82 were prepared according to the weight fractions of the components described in Table 36, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Comparative Examples 37-39 and Examples 79-82 are shown in Table 37 below.
- the liquid crystal composition of the present invention has smaller polymer residue (89-96ppm VS 139-145ppm), smaller roughness ( 9.4-9.8nm VS 13.8-14.1nm), better low-temperature storage stability (10D OK VS 6-8D NG), better alignment effect, and better pre-tilt angle stability (0.21-0.22 VS 0.31-0.32) while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33) and a smaller rotational viscosity.
- the liquid crystal compositions of Comparative Examples 40-42 and Examples 83-86 were prepared according to the weight fractions of the components described in Table 38, and the obtained liquid crystal compositions were respectively filled into "non-aligned" test boxes (the box thickness d was 3.5 ⁇ m, with ITO coatings on both sides (structured ITO in the case of multi-domain switching), no alignment layer, and no passivation layer) for performance testing.
- the relevant performance test results of the liquid crystal compositions of Comparative Examples 40-42 and Examples 83-86 are shown in Table 39 below.
- the liquid crystal composition of the present invention has smaller polymer residue (97-102ppm VS 144-158ppm), smaller roughness ( 10.4-10.8nm VS 14.4-14.9nm), better low-temperature storage stability (10D OK VS 7-8D NG), better alignment effect, and better pre-tilt angle stability (0.22-0.25 VS 0.32-0.33) while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K 11 and K 33) and a smaller rotational viscosity.
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Abstract
Description
时(其中×·表示所键结的结构中的连接位点),其作为自配向剂应用于液晶组合物时,相对于主体结构最左侧的环为3-6个环烷基的自配向剂,会使得液晶组合物具有较小的残留物浓度、较小的粗糙度以及较好的配向效果,尤其当自配向剂的主体结构最左侧的环为时,其具有更小的残留物浓度、更小的粗糙度以及更好的配向效果。
以及
以及
以及
Cp 清亮点(向列相-各向同性相的转变温度,℃)
Δn 光学各向异性(589nm,20℃)
Δε 介电各向异性(1KHz,20℃)
K11 展曲弹性常数(20℃)
K33 弯曲弹性常数(20℃)
Ra 表面粗糙度(nm)
γ1 旋转粘度(mPa·s,20℃)
t-20℃ 低温储存时间(天,-20℃)
PTA 预倾斜角(°,20℃)
ΔPTA 预倾斜角的稳定性(施加电压固定的时间后,预倾斜角的变化,°)
Claims (14)
- 一种通式O的自配向剂:
其中,Ro2表示-Spo2-Po1、-H、含有1-12个碳原子的直链的烷基、含有3-12个碳原子的支链的烷基、其中含有1-12个碳原子的直链的烷基、 中的一个或不相邻的两个以上的-CH2-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;环表示其中中的一个或更多个-CH2-可被-O-替代,并且一个或至多两个环中单键可被双键替代;环表示 其中,前述基团中的一个或不相邻的两个以上的-CH2-可分别独立地被-O-或-S-替代,并且前述基团中的一个或更多个-H可分别独立地被-F或含有1-5个碳原子的卤代或未卤代的直链烷基取代;Lo1和Lo3各自独立地表示-F、-Cl、-CN、-NO2、-NCO、-NCS、-OCN、-SCN、-C(O)N(Ro0)2、-C(O)Ro0、含有1-12个碳原子的直链的烷基、含有3-12个碳原子的支链的烷基、 其中含有1-12个碳原子的直链的烷基、中的一个或不相邻的两个以上的-CH2-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个碳原子的直链的烷基中的一个或更多个-H可分别独立地被-F取代,其中Ro0表示含有1-12个碳原子的直链的烷基、或含有3-12个碳原子的支链的烷基;Lo2表示-Spo3-Po2或Ro1和Ro3各自独立地表示锚定基团,锚定基团为 其中表示所键结的结构中的连接位点;no4表示1或2,其中当no4表示2时,-Spo8-Xo2可以相同或不同;no5表示0或1;MS1表示其中,代表MS1与所在的六元环中的-CH2-的连接位点;IS1和JS1各自独立地表示-CH2-、-O-或-S-;NS1表示=O或=S;VK1、VK2和VK3各自独立地表示-CH=或-N=;Xo1和Xo2各自独立地表示-H、-OH、-SH、-NH2、-NHR11、-N(R11)2、-NHC(O)R11、-OR11、-C(O)OH、-CHO、含有1-12个碳原子的直链的卤代或未卤代的烷基、或含有3-12个碳原子的支链的卤代或未卤代的烷基,其中Xo1和Xo2中的至少一者选自-OH、-SH、-NH2、-NHR11、-C(O)OH和-CHO组成的组,其中R11表示含有1-12个碳原子的直链的烷基、或含有3-12个碳原子的支链的烷基;Po1、Po2和Po3各自独立地表示可聚合基团;Spo1、Spo2、Spo3、Spo4、Spo5、Spo7和Spo8各自独立地表示间隔基团或单键;Spo6表示其中,表示与Spo7或Spo8的连接位点;Zo1和Zo2各自独立地表示-O-、-S-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CH2O-、-OCH2-、-CH2S-、-SCH2-、-CF2O-、-OCF2-、-CF2S-、-SCF2-、-(CH2)d-、-CF2CH2-、-CH2CF2-、-(CF2)d-、-CH=CH-、-CF=CF-、-CH=CF-、-CF=CH-、-C≡C-、-CH=CH-CO-O-、-O-CO-CH=CH-、-CH2CH2-CO-O-、-O-CO-CH2CH2-、-CHR1-、-CR1R2-或单键,其中R1和R2各自独立地表示含有1-12个碳原子的直链的烷基、或含有3-12个碳原子的支链的烷基,并且d表示1-4的整数;po1、po2、po3和po4各自独立地表示0、1或2,其中当po1表示2时,Lo1可以相同或不同,其中当po2表示2时,Lo2可以相同或不同;其中当po3表示2时,-Spo5-Ro3可以相同或不同;其中当po4表示2时,Lo3可以相同或不同;并且no2表示0、1、2或3,no3表示1、2或3,其中当no2表示2或3时,可以相同或不同,其中当no3表示2或3时,可以相同或不同。 - 根据权利要求1所述的自配向剂,其特征在于,所述通式O的自配向剂选自由如下化合物组成的组:以及其中,Lo4~Lo7各自独立地表示-F、或含有1-5个碳原子的卤代或未卤代的直链的烷基。
- 根据权利要求2所述的自配向剂,其特征在于,所述通式O-1的化合物选自由如下化合物组成的组:以及其中,Zo11表示-O-、-S-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CH2O-、-OCH2-、-CH2S-、-SCH2-、-CF2O-、-OCF2-、-CF2S-、-SCF2-、-(CH2)d-、-CF2CH2-、-CH2CF2-、-(CF2)d-、-CH=CH-、-CF=CF-、-CH=CF-、-CF=CH-、-C≡C-、-CH=CH-CO-O-、-O-CO-CH=CH-、-CH2CH2-CO-O-、-O-CO-CH2CH2-、-CHR1-、-CR1R2-或单键,其中R1和R2各自独立地表示含有1-12个碳原子的直链的烷基、或含有3-12个碳原子的支链的烷基,并且d表示1-4的整数;Lo31表示-F、-Cl、-CN、-NO2、-NCO、-NCS、-OCN、-SCN、-C(O)N(Ro0)2、-C(O)Ro0、 含有1-12个碳原子的直链的烷基、含有3-12个碳原子的支链的烷基、 其中含有1-12个碳原子的直链的烷基、中的一个或不相邻的两个以上的-CH2-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个碳原子的直链的烷基中的一个或更多个-H可分别独立地被-F取代,其中Ro0表示含有1-12个碳原子的直链的烷基、或含有3-12个碳原子的支链的烷基;并且Lo21表示-Spo3-Po2或
- 根据权利要求3所述的自配向剂,其特征在于,所述通式O-1的化合物选自由如下化合物组成的组:以及其中,Lo22表示-Spo3-Po2或
- 一种包含权利要求1-4中任一项所述的自配向剂的液晶组合物。
- 根据权利要求5所述的液晶组合物,其特征在于,所述液晶组合物包含至少一种通式M的化合物:
其中,RM1和RM2各自独立地表示含有1-12个碳原子的直链的烷基、含有3-12个碳原子的支链的烷基、其中含有1-12个碳原子的直链的烷基或含有3-12个碳原子的支链的烷基中的一个或不相邻的两个以上的-CH2-可分别独立地被-CH=CH-、-C≡C-、-O-、-CO-、-CO-O-或-O-CO-替代;环环和环各自独立地表示 其中中的一个或更多个-CH2-可被-O-替代,一个或至多两个环中单键可被双键替代,中的至多一个-H可被卤素取代;ZM1和ZM2各自独立地表示单键、-CO-O-、-O-CO-、-CH2O-、-OCH2-、-C≡C-、-CH=CH-、-CH2CH2-或-(CH2)4-;并且nM表示0、1或2,其中当nM=2时,环可以相同或不同,ZM2可以相同或不同。 - 根据权利要求6所述的液晶组合物,其特征在于,所述通式M的化合物选自由如下化合物组成的组:以及
- 根据权利要求5所述的液晶组合物,其特征在于,所述液晶组合物包含至少一种 通式N的化合物:
其中,RN1和RN2各自独立地表示-H、含有1-12个碳原子的直链的烷基、含有3-12个碳原子的支链的烷基、其中含有1-12个碳原子的直链的烷基、或含有3-12个碳原子的支链的烷基中的一个或不相邻的两个以上的-CH2-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-CH2-可被-O-替代,并且一个或至多两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;ZN1和ZN2各自独立地表示单键、-CO-O-、-O-CO-、-CH2O-、-OCH2-、-CH=CH-、-C≡C-、CH2CH2-、-CF2CF2-、-(CH2)4-、-CH=CH(CH2)nN3、-CF2O-或-OCF2-;LN1和LN2各自独立地表示-H、卤素或含有1-3个碳原子的烷基;nN1表示0、1、2或3,nN2表示0或1,且0≤nN1+nN2≤3,当nN1=2或3时,环可以相同或不同,ZN1可以相同或不同,并且nN3表示0、1、2或3。 - 根据权利要求8所述的液晶组合物,其特征在于,所述通式N的化合物选自由如下化合物组成的组:以及其中,RN11表示含有1-5个碳原子的直链的烷基、含有1-5个碳原子的直链的烷基中的一个或不相邻的两个以上的-CH2-可分别独立地被-O-、-CO-、-CO-O-或-O-CO-替代;RN12表示-H、含有1-5个碳原子的直链的烷基、含有1-5个碳原子的直链的烷基中的一个或不相邻的两个以上的-CH2-可分别独立地被-CH=CH-、-C≡C-、-O-、-CO-、-CO-O-或-O-CO-替代;并且nN3表示0、1、2或3。
- 根据权利要求5所述的液晶组合物,其特征在于,所述液晶组合物包含至少一种通式RM的可聚合化合物:
其中,R1表示-H、卤素、-CN、-Sp2-P2、含有1-12个碳原子的直链的烷基、含有3-12个碳原子的支链的烷基、其中含有1-12个碳原子的直链的烷基、含有3-12个碳原子的支链的烷基、中的一个或不相邻的两个以上的-CH2-可分别独立地被-CH=CH-、-C≡C-、-O-、-CO-、-CO-O-或-O-CO-替代,并且一个或更多个-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-CH2-可被-O-替代,并且一个或至多两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、-CN、-Sp3-P3、含有1-12个碳原子的卤代或未卤代的直链的烷基、含有1-11个碳原子的卤代或未卤代的直链的烷氧基、取代,并且一个或更多个环中-CH=可被-N=替代;环表示其中 中的一个或更多个-H可分别独立地被-F、-Cl、-CN、-Sp3-P3、含有1-12个碳原子的卤代或未卤代的直链的烷基、含有1-11个碳原子的卤代或未卤代的直链的烷氧基、取代,并且一个或更多个环中-CH=可被-N=替代;P1、P2和P3各自独立地表示可聚合基团;X0表示-O-、-S-或-CO-;Sp1、Sp2和Sp3各自独立地表示间隔基团或单键;Z1和Z2各自独立地表示-O-、-S-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CH2O-、-OCH2-、-CH2S-、-SCH2-、-CF2O-、-OCF2-、-CF2S-、-SCF2-、-(CH2)d-、-CF2CH2-、-CH2CF2-、-(CF2)d-、-CH=CH-、-CF=CF-、-CH=CF-、-CF=CH-、-C≡C-、-CH=CH-CO-O-、-O-CO-CH=CH-、-CH2CH2-CO-O-、-O-CO-CH2CH2-、-CHR1-、-CR1R2-或单键,其中R1和R2各自独立地表示含有1-12个碳原子的直链的烷基、或含有3-12个碳原子的支链的烷基,并且d表示1-4的整数;a表示0、1或2,b表示0或1,其中当a表示2时,环可以相同或不同,Z1可以相同或不同。 - 根据权利要求10所述的液晶组合物,其特征在于,所述通式RM的可聚合化合物选自由如下化合物组成的组:以及其中,X1-X10和X12各自独立地表示-F、-Cl、-Sp3-P3、含有1-5个碳原子的直链的烷基或烷氧基、
- 根据权利要求5所述的液晶组合物,其特征在于,所述液晶组合物包含至少一种通式B的化合物:
其中,RB1和RB2各自独立地表示卤素、含有1-12个碳原子的卤代或未卤代的直链烷基、含有3-12个碳原子的卤代或未卤代的支链烷基、其中含有1-12个碳原子的卤代或未卤代的直链烷基、含有3-12个碳原子的卤代或未卤代的支链烷基、中的一个或不相邻的两个以上的-CH2-可分别独立地被-CH=CH-、-CH=CF-、-C≡C-、-O-、-CO-、-CO-O-或-O-CO-替代,其中中的至多一个环中单键可被双键替代;环和环各自独立地表示 其中中的一个或更多个-CH2-可被-O-替代,并且一个或至多两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-CN、-F或-Cl取代,并且一个或更多个环中-CH=可被-N=替代;XB表示-O-、-S-或-CO-;LB1和LB2各自独立地表示-H、-F、-Cl、-CF3或-OCF3;ZB1和ZB2各自独立地表示-CO-O-、-O-CO-、-OCH2-、-CH=CH-、-C≡C-、-CH2CH2-、-CF2CF2-、-(CH2)nB3-、-(CH2)nB3O-、-(CH2)nB3S-、-CF2O-或-OCF2-,其中nB3表示0-5的整数;并且nB1和nB2各自独立地表示0、1或2,其中当nB1表示2时,环可以相同或不同,其中当nB2表示2时,环可以相同或不同。 - 根据权利要求12所述的液晶组合物,其特征在于,所述通式B的化合物选自由如下化合物组成的组:以及其中,RB1'表示含有1-8个碳原子的直链烷基或烷氧基、含有2-8个碳原子的直链烯基或烯氧基;并且XB1表示-O-或-CH2-。
- 一种包含权利要求5-13中任一项所述的液晶组合物的液晶显示器件。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119432399A (zh) * | 2025-01-07 | 2025-02-14 | 石家庄诚志永华显示材料有限公司 | 液晶组合物及包含该液晶组合物的液晶显示元件、液晶显示器 |
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| Publication number | Publication date |
|---|---|
| KR20250095744A (ko) | 2025-06-26 |
| TW202426608A (zh) | 2024-07-01 |
| TWI876767B (zh) | 2025-03-11 |
| EP4636055A4 (en) | 2026-01-21 |
| JP2025540866A (ja) | 2025-12-16 |
| US20260109900A1 (en) | 2026-04-23 |
| EP4636055A1 (en) | 2025-10-22 |
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