CN105602578A - PDLC composition with wide viewing angle - Google Patents
PDLC composition with wide viewing angle Download PDFInfo
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- CN105602578A CN105602578A CN201510956748.3A CN201510956748A CN105602578A CN 105602578 A CN105602578 A CN 105602578A CN 201510956748 A CN201510956748 A CN 201510956748A CN 105602578 A CN105602578 A CN 105602578A
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- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
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- C09K19/14—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain
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Abstract
The present invention discloses a PDLC composition with wide viewing angle. The PDLC composition comprise the following components by weight: 35.0-60.0% of a light curable material, 35.0-65.0% of a liquid crystal material and 0.1-5.0% of a photoinitiator; and the PDLC composition further comprises a spacer accounting for 0.1-0.3% total weight of the PDLC composition. The composition can be used as a dimming material in dimming film or dimming glass, has excellent viewing angle characteristics, and can improve the reduced transmittance of PDLC film surface in the case of side viewing, and can enhance the customer experience.
Description
Technical field
The PDLC composition that the present invention relates to liquid crystal material technical field, particularly a kind of wide viewing angle, relates in particular to oneBe applied in the light regulating technology fields such as light modulation film, dimming glass, intelligent rear-projection, there is the PDLC light control material compared with wide viewing angle.
Background technology
PDLC (PolymerDispersedLiquidCrystal is called for short PDLC) is to pass through polymerForm network, liquid crystal is dispersed in its polymer network with the little droplet of micron dimension, be generally made into optical thin film.
Because the optical axis of liquid crystal droplet is at random, its extraordinary ray refractive index is not mated with the refractive index of polymer network, andBetween the liquid crystal droplet of the optical axis of different orientation, refractive index is not also mated, when light when the matrix at droplet/network, droplet/micro-Thereby there is strong scattering and be opaque milky white state or translucent in an interface.
Apply electric field and can make the optical axis of liquid crystal droplet turn to, when extraordinary ray refractive index and the polymer network refraction of liquid crystalWhen rate matches, present clear state, when therefore light is perpendicular to face, transmitance is the highest. When light and face are time in a certain angle,In this angle, index matching degree, not as vertical direction, therefore causes light scattering to a certain extent, sees in this angleExamine face, the transmitance of film reduces, and face scattered light causes visual angle problem. Remove electric field, liquid crystal droplet recovers again initial faling apartLight state, thus realize the conversion of two states, and because OFF state scattered power is very high, the difference in OFF state scattered power is not remarkable.
PDLC material can, for the preparation of products such as light modulation film, intelligent dimming glass, electronics price tag, displays, exist at presentCommercial space decoration, hotel's decoration, office's partition, projection displaying, optical modulator, temperature-sensitive and pressure-sensitive device, automatically controlled glass,There have been application more widely light valve, e-book field present stage.
PDLC has a lot of important parameters, comprises that photoelectric respone curve, transmitance, driving voltage, bonding force, life-span are bondingPower, visual angle etc. What wherein customer experience is had the greatest impact is transmitance and visual angle. Therefore good visual angle has the market of PDLCVery large impact.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of PDLC composition of wide viewing angle, overcomes existing PDLC combinationThe narrower technological deficiency in visual angle that thing exists, the angular field of view of the film that increase PDLC composition is prepared, widens PDLC combinationThe range of application of thing.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A PDLC composition for wide viewing angle, the component of described PDLC composition and weight percentage thereof be,
Photo-curing material 35.0～60.0%,
Liquid crystal material 35.0～65.0%,
Light trigger 0.1～5.0%;
In described PDLC composition, also comprise the introns that account for PDLC composition total weight 1～3 ‰.
The further improvement of technical solution of the present invention is: described photo-curing material comprises photocuring prepolymer, diluentAnd reactive liquid crystalline, described photocuring prepolymer is selected from acroleic acid polyurethane, acrylic acid polyarylate, organosilicon preformed polymer and ringOxygen class prepolymer wherein one or more.
The further improvement of technical solution of the present invention is: described diluent is selected from hydroxypropyl acrylate, methacrylic acidHydroxypropyl acrylate, lauryl acrylate, lauryl methacrylate, 3-chlorine-2-hydroxyl-methacrylate, isobornyl acrylate,Isobornyl methacrylate, 1,6-hexanediyl ester, ethoxyquin trimethylolpropane triacrylate, ethylo benzene oxygenBase acrylate, ethyl phenoxymethyl acrylate, 3,3,5-trimethylcyclohexyl acrylate, three acrylic acid propane front threesAlcohol ester, trimethylolpropane tris (3-mercaptopropionic acid) ester, acrylic acid benzyl ester, methacrylic acid benzyl ester, Hexyl 2-propenoate, firstBase Hexyl 2-propenoate, dicyclopentenyl acrylate, dicyclopentenyl methacrylate, GDMA,GMA, glycidyl acrylate, 2,2,2-trifluoroethyl acrylate, acrylic acid oxolaneEster, THFMA, 2-HEMA, 2-hydroxyethylmethacry,ate, acrylic acid-2-secondBase ethyl ester monomer, 2,2,2-trifluoroethyl methacrylate, acetoacetate methacrylic acid glycol ester, cyclohexane acrylic acidEster, cyclohexane methacrylate, dodecylacrylate wherein one or more.
The further improvement of technical solution of the present invention is: described reactive liquid crystalline comprises the single reaction official shown in formula ICan roll into a ball the double reactive functional group reactions liquid crystal material shown in reactive liquid crystalline material and formula II,
Wherein,
A is selected from acrylic-functionalOr metering system acid functional groupWherein a kind of;
X1Be selected from carbon number and be wherein one of 0～9 linear alkyl chain, straight chain oxyalkyl chain that carbon number is 0～9Kind;
X2The straight chained alkyl that to be selected from cyano group, methyl, methoxyl group, trifluoromethyl, trifluoromethoxy, carbon number be 2～8The wherein one of the straight chain oxyalkyl chain that chain, carbon number are 2～8;
Y1、Y2For the wherein one of singly-bound, acetylene bond, ester bond;
B1、B2、B3Be selected from respectively Wherein a kind of.
Preferably, the single reaction functional group reactions liquid crystal material shown in formula I is specially with following formula I 1 to shown in formula I 8Reactive liquid crystalline material,
Wherein,
A is selected from acrylic-functionalOr metering system acid functional groupWherein a kind of;
X1Be selected from carbon number and be wherein one of 0～9 linear alkyl chain, straight chain oxyalkyl chain that carbon number is 0～9Kind;
X2The straight chained alkyl that to be selected from cyano group, methyl, methoxyl group, trifluoromethyl, trifluoromethoxy, carbon number be 2～8The wherein one of the straight chain oxyalkyl chain that chain, carbon number are 2～8.
More preferably, the single reaction functional group reactions liquid crystal material shown in formula I is specially with following formula I 1-1 to formula I 8-Reactive liquid crystalline material shown in 1,
Preferably, the double reactive functional group reactions liquid crystal material shown in formula II is specially with following formula II 1 to 5 of formula IIThe reactive liquid crystalline material showing,
Wherein,
A is selected from acrylic-functionalOr metering system acid functional groupWherein a kind of;
X1Be selected from carbon number and be wherein one of 0～9 linear alkyl chain, straight chain oxyalkyl chain that carbon number is 0～9Kind;
Y1Select ester bond, acetylene bond, C-C singly-bound, the two keys of CC, wherein one of-N=N-key.
Y2Select ester bond, acetylene bond, C-C singly-bound, the two keys of CC, wherein one of-N=N-key.
More preferably, the double reactive functional group reactions liquid crystal material shown in formula II is specially with following formula II 1-1 to formulaReactive liquid crystalline material shown in II 5-1,
The further improvement of technical solution of the present invention is: described light trigger is selected from organic peroxide evocating agent, nothingThe wherein one of machine peroxide initiator, azo-initiator, redox initiator.
The further improvement of technical solution of the present invention is: described organic peroxide evocating agent is selected from the peroxidating of acyl classThing, hydroperoxides, dialkyl peroxide, ester class peroxide, ketone peroxide, two carbonic ester peroxide are whereinOne or more. Described acyl class peroxide be selected from benzoyl peroxide, lauroyl peroxide wherein one or more; DescribedHydroperoxides be selected from isopropyl benzene hydroperoxide, TBHP wherein one or more; Described dialkyl group peroxidatingThing be selected from di-t-butyl peroxide, cumyl peroxide wherein one or more; Described ester class peroxide is selected from peroxideChange t-butyl perbenzoate, the peroxidating valeric acid tert-butyl ester wherein one or more; Described ketone peroxide is selected from peroxidating firstEthyl ketone, cyclohexanone peroxide wherein one or more; Described two carbonic ester peroxide are selected from peroxy dicarbonate diisopropylEster, di-cyclohexylperoxy di-carbonate wherein one or more.
The further improvement of technical solution of the present invention is: described inorganic peroxide initator is persulfuric acid salt, choosingFrom potassium peroxydisulfate, sodium peroxydisulfate, ammonium persulfate wherein one or more.
The further improvement of technical solution of the present invention is: described azo-initiator is low activity initator, is selected from idolNitrogen bis-isobutyronitrile, ABVN wherein one or more.
The further improvement of technical solution of the present invention is: described redox initiator be selected from TBHP/Sodium pyrosulfite, ammonium persulfate/sodium hydrogensulfite, potassium peroxydisulfate/sodium hydrogensulfite, hydrogen peroxide/tartaric acid, ammonium persulfate/Ferrous sulfate hydrogen peroxide/sulfuric acid ferrous iron, benzoyl peroxide/N, N-diethylaniline, benzoyl peroxide/pyrophosphoric acid AsiaIron, potassium peroxydisulfate/silver nitrate, persulfate/mercaptan, isopropyl benzene hydroperoxide/frerrous chloride, potassium peroxydisulfate/frerrous chloride, mistakeThe wherein one of hydrogen oxide/frerrous chloride, isopropyl benzene hydroperoxide/tetra-aziridine.
The further improvement of technical solution of the present invention is: described introns be the identical and diameter of diameter 10～30 μ m itBetween rigidity microballon.
Liquid crystal material in the present invention is the liquid crystal compound of selling on market, and the liquid crystal monomer of selling on market.
The present invention has the following advantages compared with conventional art:
The PDLC composition of a kind of wide viewing angle of the present invention, is applied on light modulation film or dimming glass as light control material,There is fabulous viewing angle characteristic, can improve the PDLC side problem that face transmitance reduces while watching, can promote client's bodyTest impression.
Compare with traditional pdlc film layer, the PDLC composition of a kind of wide viewing angle of the present invention uses reactive liquid crystalline materialMaterial, the reactivity difference by differential responses active group when the UV polymerization, liquid crystal droplet and polymer network interface shapeThe boundary layer that becomes one deck refractive index gradient to change, thus realize in the time that light passes through PDLC film from side direction, in side direction light pathScattering reduces with refraction, and the single reaction functional group reactions liquid crystal material shown in formula I is used for controlling carbon chain lengths, shown in formula IIDouble reactive functional group reactions liquid crystal material be used for controlling polymerization order.
Introns in the PDLC composition of a kind of wide viewing angle of the present invention are for controlling between two sections of base materials of light modulation filmApart from uniformity.
Detailed description of the invention
The invention discloses a kind of PDLC composition of wide viewing angle, the component of PDLC composition and weight percentage thereofFor,
Wherein,
Photo-curing material comprises photocuring prepolymer, diluent and reactive liquid crystalline.
Liquid crystal material is the liquid crystal compound of selling on market, and the liquid crystal monomer of selling on market.
Light trigger is also selected from organic peroxide evocating agent, inorganic peroxide initator, azo-initiator, oxidationThe wherein one of former initator.
Introns are the identical and rigidity microballon of diameter between 10～30 μ m of diameter.
Below in conjunction with embodiment, technical scheme of the present invention is further explained.
Embodiment 1
The PDLC composition of a kind of wide viewing angle of the present embodiment, the component in PDLC composition and weight percentage thereof asShown in lower:
Photo-curing material 49.0%,
Liquid crystal material 50.0%,
Light trigger 1.0%.
The composition of the photo-curing material of the present embodiment and the composition weight percentage in PDLC composition is specially:
Photocuring prepolymer 24.0%,
Diluent 22.0%,
Reactive liquid crystalline 3.0%.
Photocuring prepolymer is selected the CN704 of Sartomer company. CN704 is single functionality acrylic polyester, has improvementThe effect of adhesive force, in this formula, conduct mainly provides the composition of polymer strength.
Diluent is selected hydroxypropyl acrylate.
The structural formula of reactive liquid crystalline and the weight percentage in PDLC composition thereof are specially:
The liquid crystal material of the present embodiment is selected the liquid crystal material SL-79 of Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd..The deltan=0.22 of SL-79, has compared with high birefringence, is conducive to improve the Haze degree of PDLC. Chief component is biphenylCyanogen, terphenyl cyanogen class liquid crystal.
The light trigger selective light initator UV184 of the present embodiment. Light trigger 184, chemical name is 1-hydroxyl hexamethyleneBase phenyl ketone, molecular formula is C25H30O3, molecular weight 378.5039, CAS registration number is 947-19-3.
In the present embodiment, the diameter of introns is 10um, and in PDLC composition, introns account for PDLC composition total weight1 ‰. Introns material is SiO2。
Embodiment 2
The PDLC composition of a kind of wide viewing angle of the present embodiment, the component in PDLC composition and weight percentage thereof asShown in lower:
Photo-curing material 48.0%,
Liquid crystal material 50.0%,
Light trigger 2.0%;
The composition of the photo-curing material of the present embodiment and the composition weight percentage in PDLC composition is specially:
Photocuring prepolymer 24.0%,
Diluent 21.0%,
Reactive liquid crystalline 3.0%.
Photocuring prepolymer is selected the acroleic acid polyurethane CN966J75NS of Sartomer company. CN966J75NS is difunctionalityDegree aliphatic urethane acrylate polymer, has the advantages that strength high toughness is good, and polymer is mainly provided in this formulaIntensity and toughness.
Diluent is selected lauryl acrylate.
The structural formula of reactive liquid crystalline and the weight percentage in PDLC composition thereof are specially:
The liquid crystal material of the present embodiment is selected the liquid crystal material of Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd.SLC1717. Birefringence 0.22, main component is biphenyl cyanogen, lipid and benzene alkyne type liquid crystal. Be applied in this formula and haveThe feature that Haze is high.
The light trigger selective light initator UV184 of the present embodiment. Chemical name is 1-hydroxy-cyclohexyl phenyl ketone, pointMinor is C25H30O3, molecular weight 378.5039, and CAS registration number is 947-19-3, common photochemical catalyst and auxiliary agent one.
In the present embodiment, the diameter of introns is 15um, and in PDLC composition, introns account for PDLC composition total weight2 ‰. Introns material is SiO2。
Embodiment 3
The PDLC composition of a kind of wide viewing angle of the present embodiment, the component in PDLC composition and weight percentage thereof asShown in lower:
Photo-curing material 44.0%,
Liquid crystal material 55.0%,
Light trigger 1.0%;
The composition of the photo-curing material of the present embodiment and the composition weight percentage in PDLC composition is specially:
Photocuring prepolymer 17.0%,
Diluent 21.0%,
Reactive liquid crystalline 4.0%.
Photocuring prepolymer is selected the acroleic acid polyurethane UV65 of Shanghai Ku Er Industrial Co., Ltd.. It is high that UV65 has intensityThe feature of good toughness mainly provides polymer strength and toughness in this formula.
The composition of diluent and the composition weight percentage in PDLC composition is specially:
The structural formula of reactive liquid crystalline and the weight percentage in PDLC composition thereof are specially:
The liquid crystal material of the present embodiment is selected the liquid crystal material SL-16 of Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd..
The light trigger selective light initator TPO of the present embodiment. Chemical name: 2,4,6 ,-trimethylbenzoyl-hexicholBase phosphorous oxide English name: 2,4,6-TrimethylBenzoylDiphenylphosphineOxideCASNO:75980-60-8 molecular formula: C22H21PO2 molecular weight: 348.5. TPO is a kind of free radical (1) type light efficiently, long wavelengthIn scope, there is the efficiency light initator of absorption. Because it has very wide absorption region, its effective absorption peak is 350-400nm, absorbs always and causes 420nm left and right, and its absworption peak is partially long compared with normal starter, after illumination, can generate benzoyl and phosphorusTwo free radicals of acyl group, can initiated polymerization, and therefore laser curing velocity is fast, and it also has photobleaching, is suitable for thick film darkLayer solidifies the characteristic with not flavescence of coating, has low volatilization, is applicable to water base.
In the present embodiment, the diameter of introns is 15um, and in PDLC composition, introns account for PDLC composition total weight2 ‰. Introns material is SiO2。
Embodiment 4
The PDLC composition of a kind of wide viewing angle of the present embodiment, the component in PDLC composition and weight percentage thereof asShown in lower:
Photo-curing material 44.0%,
Liquid crystal material 54.5%,
Light trigger 1.5%;
The composition of the photo-curing material of the present embodiment and the composition weight percentage in PDLC composition is specially:
Photocuring prepolymer 19.0%,
Diluent 22.0%,
Reactive liquid crystalline 3.0%.
Photocuring prepolymer is selected the acrylic acid polyarylate CN970A80 of Sartomer company. CN970A80 has intensity high-ductilityThe feature that property is good mainly provides polymer strength and toughness in this formula
The composition of diluent and the composition weight percentage in PDLC composition is specially:
The structural formula of reactive liquid crystalline and the weight percentage in PDLC composition thereof are specially:
The liquid crystal material of the present embodiment is selected the liquid crystal material RQ-002 of Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd..Main component is lipid cyanogen class and biphenyl cyanogen liquid crystal. Birefringence n=0.2. In this formula, there is good solubility and poly-Being separated property after closing.
The light trigger selective light initator UV651 of the present embodiment. UV651 (1065) light trigger claims again benzil two firstEther, chemical name a, a-dimethoxy-a-phenyl acetophenone, is called for short DMPA, and structural formula is C6H5COC (OCH3) 2C6H5, moleculeAmount 256.30. White or light yellow crystallization, relative density 1.1278. 64～67 DEG C of fusing points. Be dissolved in acetone, ethyl acetate, isopropylThe organic solvent such as alcohol, hot methanol, water insoluble. Acid decomposition, stable in alkalescence, to photaesthesia. Low toxicity. Maximum absorption wavelength337nm, is applicable to the systems such as unsaturated polyester (UP)/styrene, acrylate, siloxanes, and heat endurance is very good, has higherAnti-quencher and light trigger activity, but xanthochromia is more serious.
In the present embodiment, the diameter of introns is 20um, and in PDLC composition, introns account for PDLC composition total weight3 ‰. Introns material is SiO2。
Embodiment 5
The PDLC composition of a kind of wide viewing angle of the present embodiment, the component in PDLC composition and weight percentage thereof asShown in lower:
Photo-curing material 47.0%,
Liquid crystal material 51.0%,
Light trigger 2.0%;
The composition of the photo-curing material of the present embodiment and the composition weight percentage in PDLC composition is specially:
Photocuring prepolymer 20.0%,
Diluent 24.0%,
Reactive liquid crystalline 3.0%.
Photocuring prepolymer is selected the acrylic acid polyarylate CN9782 of Sartomer company. CN9782 is aromatic polyester, toolThere is higher refractive index, in this formula, mainly provide the structural strength of polymer network.
The composition of diluent and the composition weight percentage in PDLC composition is specially:
The structural formula of reactive liquid crystalline and the weight percentage in PDLC composition thereof are specially:
The liquid crystal material of the present embodiment is selected the liquid crystal material 099316 of Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd..099316 consists of lipid liquid crystal, biphenyl cyanogen class liquid crystal, fluorine class liquid crystal, solvent based liquid crystal etc. Because its birefringence is 0.169, itsIn PDLC liquid crystal, visual angle performance better.
The light trigger selective light initator ITX of the present embodiment. Chemical name: 2 isopropyl thioxanthones, ITX be forTransparent or coloured UV-solidify ink for screen printing, overprint varnish, planographic ink, flexo ink, electronic product, wood coating,The efficiency light initator of adhesive and photoresist.
In the present embodiment, the diameter of introns is 25um, and in PDLC composition, introns account for PDLC composition total weight2 ‰. Introns material is SiO2。
Embodiment 6
The PDLC composition of a kind of wide viewing angle of the present embodiment, the component in PDLC composition and weight percentage thereof asShown in lower:
Photo-curing material 50.0%,
Liquid crystal material 47.5%,
Light trigger 2.5%;
The composition of the photo-curing material of the present embodiment and the composition weight percentage in PDLC composition is specially:
Photocuring prepolymer 24.0%,
Diluent 23.0%,
Reactive liquid crystalline 3.0%.
Photocuring prepolymer is selected the acrylic acid polyarylate CN975 of Sartomer company. CN975 is aromatic polyester, hasHigher refractive index, in this formula, mainly provides the structural strength of polymer network
The composition of diluent and the composition weight percentage in PDLC composition is specially:
The structural formula of reactive liquid crystalline and the weight percentage in PDLC composition thereof are specially:
The liquid crystal material of the present embodiment is selected the liquid crystal material I71-of Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd.004. I71-004 is high birefringence liquid crystal, and deltan=0.24 has good Haze in this formula. Main component is fluorineCyanogen class liquid crystal and alkyne type liquid crystal.
The light trigger selective light initator ITX of the present embodiment. Chemical name: 2 isopropyl thioxanthones, ITX be forTransparent or coloured UV-solidify ink for screen printing, overprint varnish, planographic ink, flexo ink, electronic product, wood coating,The efficiency light initator of adhesive and photoresist
In the present embodiment, the diameter of introns is 25um, and in PDLC composition, introns account for PDLC composition total weight3 ‰. Introns material is SiO2。
Embodiment 7
The PDLC composition of a kind of wide viewing angle of the present embodiment, the component in PDLC composition and weight percentage thereof asShown in lower:
Photo-curing material 53.0%,
Liquid crystal material 44.0%,
Light trigger 3.0%;
The composition of the photo-curing material of the present embodiment and the composition weight percentage in PDLC composition is specially:
Photocuring prepolymer 30.0%,
Diluent 20.0%,
Reactive liquid crystalline 3.0%.
Photocuring prepolymer is selected the acrylic acid polyarylate CN970A80 of Sartomer company. It is aromatic polyester, hasHigher refractive index, in this formula, mainly provides the structural strength of polymer network
The composition of diluent and the composition weight percentage in PDLC composition is specially:
The structural formula of reactive liquid crystalline and the weight percentage in PDLC composition thereof are specially:
The liquid crystal material of the present embodiment is selected the liquid crystal material I71-of Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd.004. I71-004 is high birefringence liquid crystal, and deltan=0.24 has good Haze in this formula. Main component is fluorineCyanogen class liquid crystal and alkyne type liquid crystal.
The light trigger selective light initator cyclohexanone peroxide of the present embodiment. Molecular formula is C12H22O5C5H10C(OOH) OOC (OH) C5H10. English name cyclohexanoneperoxide.
In the present embodiment, the diameter of introns is 30um, and in PDLC composition, introns account for PDLC composition total weight3 ‰. Introns material is SiO2。
Embodiment 8
The PDLC composition of a kind of wide viewing angle of the present embodiment, the component in PDLC composition and weight percentage thereof asShown in lower:
Photo-curing material 57.0%,
Liquid crystal material 40.0%,
Light trigger 3.0%;
The composition of the photo-curing material of the present embodiment and the composition weight percentage in PDLC composition is specially:
Photocuring prepolymer 27.0%,
Diluent 25.0%,
Reactive liquid crystalline 5.0%.
Photocuring prepolymer is selected organosilicon preformed polymer.
The composition of diluent and the composition weight percentage in PDLC composition is specially:
The structural formula of reactive liquid crystalline and the weight percentage in PDLC composition thereof are specially:
The liquid crystal material of the present embodiment is selected the liquid crystal material of Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd.SLC9012. SLC9012 is mainly cyanogen class liquid crystal.
The light trigger selective light initator azodiisobutyronitrile of the present embodiment. English name: 2,2'-Azobis (2-Methylpropionitrile). No. CAS: 78-67-1. Azodiisobutyronitrile is oil-soluble azo initiator, and azo drawsSending out agent stable reaction, is first order reaction, there is no side reaction, and relatively good control, so be widely used in high molecular research and lifeProduce. Such as monomer polymerization initators such as vinyl chloride, vinyl acetate, acrylonitrile, also can be used as polyvinyl chloride, polyolefin, polyurethane,Polyvinyl alcohol, acrylonitrile and butadiene and styrol copolymer, PIC, polyvinyl acetate, polyamide and polyester etc.Blowing agent.
In the present embodiment, the diameter of introns is 30um, and in PDLC composition, introns account for PDLC composition total weight3 ‰. Introns material is SiO2。
Embodiment 9
The PDLC composition of a kind of wide viewing angle of the present embodiment, the component in PDLC composition and weight percentage thereof asShown in lower:
Photo-curing material 62.0%,
Liquid crystal material 35.0%,
Light trigger 3.0%;
The composition of the photo-curing material of the present embodiment and the composition weight percentage in PDLC composition is specially:
Photocuring prepolymer 25.0%,
Diluent 32.0%,
Reactive liquid crystalline 5.0%.
Photocuring prepolymer is selected epoxy prepolymer.
The composition of diluent and the composition weight percentage in PDLC composition is specially:
The structural formula of reactive liquid crystalline and the weight percentage in PDLC composition thereof are specially:
The liquid crystal material of the present embodiment is selected the liquid crystal material of Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd.SLC1717. Birefringence 0.22, main component is biphenyl cyanogen, lipid and benzene alkyne type liquid crystal. Be applied in this formula and haveThe feature that Haze is high.
The light trigger selective light initator isopropyl benzene hydroperoxide/frerrous chloride of the present embodiment.
In the present embodiment, the diameter of introns is 30um, and in PDLC composition, introns account for PDLC composition total weight2 ‰. Introns material is SiO2。
Embodiment 10
The PDLC composition of a kind of wide viewing angle of the present embodiment, the component in PDLC composition and weight percentage thereof asShown in lower:
Photo-curing material 62.0%,
Liquid crystal material 35.0%,
Light trigger 3.0%;
The composition of the photo-curing material of the present embodiment and the composition weight percentage in PDLC composition is specially:
Photocuring prepolymer 25.0%,
Diluent 34.0%,
Reactive liquid crystalline 3.0%.
Photocuring prepolymer is selected epoxy prepolymer.
The composition of diluent and the composition weight percentage in PDLC composition is specially:
The structural formula of reactive liquid crystalline and the weight percentage in PDLC composition thereof are specially:
The liquid crystal material of the present embodiment is selected the liquid crystal material SL-79 of Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd..The deltan=0.22 of SL-79, has compared with high birefringence, is conducive to improve the Haze degree of PDLC. Chief component is biphenylCyanogen, terphenyl cyanogen class liquid crystal.
The light trigger selective light initator lauroyl peroxide of the present embodiment. English name: LauroylPeroxide.Make high molecular polymerization initator, blowing agent.
In the present embodiment, the diameter of introns is 40um, and in PDLC composition, introns account for PDLC composition total weight2 ‰. Introns material is SiO2。
Embodiment 11
Preparation PDLC light modulation film Film-1～Film-10.
1) base material is laid on coating cloth deck, coater speed is set to 20mm/s, by above-described embodiment 1-embodiment 10The PDLC composition of the wide viewing angle of preparing drops in dispense tip place, starts start button, is coated with, and obtains diaphragm;
2) diaphragm is placed in ultra-violet curing machine and adopts 0.5mW～2.5mW/cm2Energy-curable 2min, obtain PDLC adjustLight film Film-1～Film-10.
PDLC light modulation film Performance Detection condition:
Mist degree: WGT-S transmitance/mist degree tester;
Diaphragm and light path are 45 ° of test mist degrees. Driving applied voltage unified is 110V.
Diaphragm Film-1～the Film-10 of embodiment 11 gained PDLC light modulation films, performance test results is as shown in table 1,Film-11 is commercially available prod performance.
The performance test results of table 1, Film-1 to Film-11
As from the foregoing, the PDLC composition of wide viewing angle of the present invention, the PDLC light modulation film being made into as light control material, rightVisual angle makes moderate progress. With the existing PDLC light modulation film of routine on the market, PDLC light modulation film viewing angle characteristic of the present invention is good, thisThe effect of sample is that those skilled in the art can not expect.
Although describe the present invention in conjunction with the preferred embodiments, the present invention is not limited to above-described embodiment, shouldWork as understanding, under the guiding of the present invention's design, those skilled in the art can carry out various amendments and improvement, and claims are generalDraw together scope of the present invention.
Claims (10)
1. a PDLC composition for wide viewing angle, is characterized in that: the component of described PDLC composition and weight percentage thereofFor,
Photo-curing material 35.0～60.0%,
Liquid crystal material 35.0～65.0%,
Light trigger 0.1～5.0%;
In described PDLC composition, also comprise the introns that account for PDLC composition total weight 1～3 ‰.
2. the PDLC composition of a kind of wide viewing angle according to claim 1, is characterized in that: described photo-curing material comprisesPhotocuring prepolymer, diluent and reactive liquid crystalline; Described photocuring prepolymer is selected from acroleic acid polyurethane, the poly-virtue of acrylic acidEster, organosilicon preformed polymer and epoxide wherein one or more.
3. the PDLC composition of a kind of wide viewing angle according to claim 2, is characterized in that: described diluent is selected from propyleneAcid hydroxypropyl acrylate, hydroxy propyl methacrylate, lauryl acrylate, lauryl methacrylate, 3-chlorine-2-hydroxyl-metering systemAcid esters, isobornyl acrylate, isobornyl methacrylate, 1,6-hexanediyl ester, ethoxyquin trihydroxy methyl thirdAlkane triacrylate, ethyl phenoxy group acrylate, ethyl phenoxymethyl acrylate, 3,3,5-trimethylcyclohexyl propyleneAcid esters, three acrylic acid propane front three alcohol esters, trimethylolpropane tris (3-mercaptopropionic acid) ester, acrylic acid benzyl ester, metering systemAcid benzyl ester, Hexyl 2-propenoate, hexyl methacrylate, dicyclopentenyl acrylate, dicyclopentenyl methacrylate,GDMA, GMA, glycidyl acrylate, 2,2,2-trifluoroethyl propyleneAcid esters, acrylic acid tetrahydrofuran ester, THFMA, 2-HEMA, 2-hydroxyethylAcrylate, acrylic acid-2-ethyl ethyl ester monomer, 2,2,2-trifluoroethyl methacrylate, acetoacetate methacrylic acidGlycol ester, cyclohexane acrylate, cyclohexane methacrylate, dodecylacrylate wherein one or more.
4. the PDLC composition of a kind of wide viewing angle according to claim 2, is characterized in that: described reactive liquid crystalline comprisesDouble reactive functional group reactions liquid crystal material shown in single reaction functional group reactions liquid crystal material shown in formula I and formula IIMaterial,
Wherein,
A is selected from acrylic-functionalOr metering system acid functional groupWherein a kind of;
X1Be selected from carbon number and be the wherein a kind of of 0～9 linear alkyl chain, straight chain oxyalkyl chain that carbon number is 0～9;
X2Linear alkyl chain, carbon that to be selected from cyano group, methyl, methoxyl group, trifluoromethyl, trifluoromethoxy, carbon number be 2～8 are formerSubnumber is the wherein a kind of of 2～8 straight chain oxyalkyl chain;
Y1、Y2For the wherein one of singly-bound, acetylene bond, ester bond;
B1、B2、B3Be selected from respectively Wherein a kind of.
5. the PDLC composition of a kind of wide viewing angle according to claim 1, is characterized in that: described light trigger has been selected fromThe wherein one of machine peroxide initiator, inorganic peroxide initator, azo-initiator, redox initiator.
6. the PDLC composition of a kind of wide viewing angle according to claim 5, is characterized in that: described organic peroxide drawsSend out agent and be selected from acyl class peroxide, hydroperoxides, dialkyl peroxide, ester class peroxide, ketone peroxide, two carbonAcid esters peroxide wherein one or more; Described acyl class peroxide is selected from benzoyl peroxide, lauroyl peroxideWherein one or more; Described hydroperoxides are selected from the wherein a kind of or several of isopropyl benzene hydroperoxide, TBHPKind; Described dialkyl peroxide be selected from di-t-butyl peroxide, cumyl peroxide wherein one or more; Described esterClass peroxide be selected from peroxidized t-butyl perbenzoate, the peroxidating valeric acid tert-butyl ester wherein one or more; Described ketone mistakeOxide be selected from methyl ethyl ketone peroxide, cyclohexanone peroxide wherein one or more; Described two carbonic ester peroxide are selected fromDi-isopropyl peroxydicarbonate, di-cyclohexylperoxy di-carbonate wherein one or more.
7. the PDLC composition of a kind of wide viewing angle according to claim 5, is characterized in that: described inorganic peroxide drawsSending out agent is persulfuric acid salt, be selected from potassium peroxydisulfate, sodium peroxydisulfate, ammonium persulfate wherein one or more.
8. the PDLC composition of a kind of wide viewing angle according to claim 5, is characterized in that: described azo-initiator isLow activity initator, be selected from azodiisobutyronitrile, ABVN wherein one or more.
9. the PDLC composition of a kind of wide viewing angle according to claim 5, is characterized in that: described redox initiatorBe selected from TBHP/sodium pyrosulfite, ammonium persulfate/sodium hydrogensulfite, potassium peroxydisulfate/sodium hydrogensulfite, peroxidatingHydrogen/tartaric acid, ammonium persulfate/ferrous sulfate hydrogen peroxide/sulfuric acid ferrous iron, benzoyl peroxide/N, N-diethylaniline, peroxideChange benzoyl/ferrous pyrophosphate, potassium peroxydisulfate/silver nitrate, persulfate/mercaptan, isopropyl benzene hydroperoxide/frerrous chloride, mistakeThe wherein one of potassium sulfate/frerrous chloride, hydrogen peroxide/frerrous chloride, isopropyl benzene hydroperoxide/tetra-aziridine.
10. the PDLC composition of a kind of wide viewing angle according to claim 1, is characterized in that: described introns are diameterIdentical and the rigidity microballon of diameter between 10～30 μ m.
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| CN113024712B (en) * | 2019-12-24 | 2022-05-17 | 北京大学 | Preparation method of polymer dispersed liquid crystal material based on rigid structure monomer at tail end |
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