CN104231830A - Preparation method of diffusion film coating composition, preparation method of diffusion film, and corresponding diffusion film - Google Patents
Preparation method of diffusion film coating composition, preparation method of diffusion film, and corresponding diffusion film Download PDFInfo
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- CN104231830A CN104231830A CN201410389796.4A CN201410389796A CN104231830A CN 104231830 A CN104231830 A CN 104231830A CN 201410389796 A CN201410389796 A CN 201410389796A CN 104231830 A CN104231830 A CN 104231830A
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Abstract
The invention provides a preparation method of a coating composition for forming a diffusion film on a surface of a transparent base material. The method comprises the following steps: (1) forming a particle nuclear disperse phase A from particle nuclear and a solvent; (2) adding a reactive monomer and an initiator to the particle nuclear disperse phase A in the step (1), forming a particle core-shell structure by in-situ reaction, and preparing a diffusion particle dispersion liquid B; and (3) adding resin, a monomer, an initiator and an adjuvant to the diffusion particle dispersion liquid B in the step (2), and preparing the diffusion film coating composition. In the invention, firstly, particle nucleus is evenly dispersed in the solution to prepare the diffusion particle dispersion liquid, and a hardening agent is added to the diffusion particle dispersion liquid to directly prepare a coating solution. Diffusion particles formed by the particle nucleus by in-situ reaction reach controllable mean density, improvement of the problem of diffusion particle sedimentation is facilitated, the diffused particles are evenly dispersed into a dispersion liquid after in-situ reaction, the viscosity of the dispersion liquid is relatively low, and diffusion of the diffusion particles is facilitated.
Description
Technical field
The present invention relates to a kind of preparation method of diffusion barrier coating composition, the preparation method of diffusion barrier and corresponding diffusion barrier.
Background technology
In recent years, various liquid crystal flat-panel technique of display is fast-developing.Diffusion barrier is one of structure of backlight module device, and its function is through the light diffusion of material, realizes revising diffusion angle, optical radiation area is increased, to provide uniform area source to flat-panel monitor.
Chinese patent application 201210430200.1 provides a kind of optical diffusion that can be used for flat panel display backlight module, in coating fluid, resin and diffusion particle proportioning is adjusted in this invention, and add flow agent, after ultraviolet (UV) solidification, can observe from sem test, the outward appearance of diffusion barrier is uneven, and have the agglomeration of particle, the reason of above phenomenon is caused to be owing to having consistency and dispersion problem significantly between diffusion particle and polymkeric substance, and there is settlement issues in particle in diffusion barrier preparation technology, make the mist degree of reduction diffusion barrier, increase the transmittance of rete, affect homogeneity and the conforming product rate of product.
In addition, this technical scheme disperses diffusion particle in coating fluid, diffusion particle is caused to be difficult to be uniformly dispersed, and there is sedimentation phenomenon, thus reduce the homogeneity of diffusion barrier outward appearance, increase coating process difficulty, reduce the mist degree of diffusion barrier, easily cost increases in process of production, the serious problems such as optical property is uneven occurs in finished product, affects homogeneity and the conforming product rate of product.Its reason is due to after resin is adopted solvent dispersion, the overall viscosity of mixed solution improves greatly, diffusion particle motor capacity in this full-bodied mixed solution is poor, diffusion particle is caused not easily to disperse in system, there is the agglomeration of particle, the particle of reuniting is larger than coating fluid due to mean density, easily sedimentation phenomenon occurs.Therefore after coating, diffusion barrier outward appearance is uneven, and average particle density reduces, have a strong impact on the light diffusing energy of diffusion barrier and the homogeneity of optical property, cause product mist degree on the low side, affect the optical property of diffusion barrier, weathering resistance, product qualified rate, and add production cost.
Chinese patent application 201310185113.9 provides a kind of preparation method of diffusion barrier: organosilicon photo-diffusion particle be dispersed in solvent and obtain mixed solution, then adds coating resin and solidifying agent to this mixed solution, is prepared into diffusion barrier coating fluid system after mixing.But preparation method's Problems existing of this invention is: because organosilicon particle is poorer than coating resin with the consistency of solvent, therefore be dispersed in the process of solvent at organosilicon diffusion particle, diffusion particle more easily forms the phenomenon of reunion, it is made to fail to be disperseed preferably, cause particle dispersion in diffusion barrier goods uneven, affect homogeneity and the stability of its optical property.
In prior art, first make stiffening agent and solvent form mixed solution, then in mixed solution, add diffusion particle, this method easily causes diffusion particle to reunite.Reason is due to by after stiffening agent and solvent, and the overall viscosity of mixed solution improves greatly, and diffusion particle motor capacity in this full-bodied mixed solution is poor, causes diffusion particle not easily to disperse in system, occurs the agglomeration of particle.
In the present invention, first make particle core be uniformly dispersed in the solution, prepare diffusion particle dispersion liquid; Then in diffusion particle dispersion liquid, add stiffening agent, directly configure coating fluid.It is controlled that the diffusion particle formed after reaction in－situ due to particle core reaches mean density, is conducive to the problem improving diffusion particle sedimentation; Be dispersed in dispersion liquid after diffusion particle reacts in position, and the viscosity of dispersion liquid itself is lower, be beneficial to the dispersion of diffusion particle, therefore processing method of the present invention not only effectively can improve the uneven agglomeration traits caused of diffusion particle dispersion, and decreases technical process.
According to another embodiment of the present invention, reactive monomer, at the surface aggregate of particle core, forms shelly integument, and then forms the diffusion particle comprising particle core and integument, and particle core is not identical with the material of integument.
In the program, use two kinds of unlike materials to prepare particle core and integument respectively, its effect is:
1) traditional uncoated diffusion particle is compared, the present invention is by the diffusion particle of the coated formation of material of different densities, make diffusion particle density adjustable, and then regulate the mean density of diffusion particle, make the liquid portion of the mean density of diffusion particle and coating fluid close, effectively alleviate the sedimentation phenomenon of diffusion particle in coating fluid;
2) traditional uncoated diffusion particle is compared, the present invention is by the diffusion particle of the coated formation of different refractivity, can make light, in by the process of particle, birefringence occur, with light regulating by extent of refraction during diffusion barrier, thus preparation light transmission is excellent, the high functionality diffusion barrier of haze.
According to another embodiment of the present invention, the mean density of diffusion particle is ρ 3, and the mean density of the liquid portion of diffusion barrier coating composition is ρ 4, wherein 0.8≤ρ 3/ ρ 4≤1.2.
As shown in Figure 7, the material density of particle core is ρ 1, and particle core radius is r1, and the material density of integument is ρ 2, and after parcel, the total radius of particle is r2, and after parcel, particle mean density is ρ 3,
Wherein,
The liquid portion of diffusion barrier coating composition comprises resin, solvent, dispersion agent, initiator, flow agent, defoamer etc., and its mean density is ρ 4, by regulating the material of particle core and integument, Jacket thickness to make 0.8≤ρ 3/ ρ 4≤1.2.
In the structure of diffusion particle, the material of particle core can be inorganic particulate, organic filler or organosilicon particle, according to another embodiment of the present invention, the material of particle core is silicon-dioxide, calcium carbonate, titanium dioxide, polymethylmethacrylate, polystyrene, polycarbonate or organopolysiloxane;
Reactive monomer is one or more in methyl methacrylate, vinylbenzene, carbonic ether, organo-siloxane; Accordingly, the material of integument is one or more in polymethylmethacrylate, polystyrene, polycarbonate, organopolysiloxane.
According to another embodiment of the present invention, stiffening agent is light-cured resin or heat reactive resin.
According to another embodiment of the present invention, resin is oiliness cured resin or aqueous curable resin.
On the other hand, the invention provides a kind of diffusion barrier, it comprises transparent substrate and diffusion layer, wherein,
Diffusion layer is coated transparent substrate surface by diffusion barrier coating composition and is formed;
Diffusion barrier coating composition is prepared by above-mentioned diffusion barrier method for preparing coatings composition.
Another aspect, the invention provides a kind of diffusion barrier preparation method, it comprises the steps:
I, transparent substrate surface coated by preceding claim preparation method obtain diffusion barrier coating composition;
II, the diffusion barrier coating composition that step I is coated with is dry and solidify.
Further, in Step II, by illumination or heating, the diffusion barrier coating composition that step I is coated with.
Again on the one hand, the invention provides the diffusion barrier prepared by above-mentioned diffusion barrier preparation method.
Compared with prior art, the present invention possesses following beneficial effect:
In the present invention, first make particle core be uniformly dispersed in the solution, prepare diffusion particle dispersion liquid; Then in diffusion particle dispersion liquid, add stiffening agent, directly configure coating fluid.It is controlled that the diffusion particle formed after reaction in－situ due to particle core reaches mean density, is conducive to the problem improving diffusion particle sedimentation; Be dispersed in dispersion liquid after diffusion particle reacts in position, and the viscosity of dispersion liquid itself is lower, be beneficial to the dispersion of diffusion particle, therefore processing method of the present invention not only effectively can improve the uneven agglomeration traits caused of diffusion particle dispersion, and decreases technical process.In addition, by the particle core and the integument that use two kinds of unlike materials to prepare diffusion particle respectively, regulate the mean density of diffusion particle, make the liquid portion of the mean density of diffusion particle and coating fluid close, thus solve the settlement issues of diffusion particle.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Summary of the invention
For the shortcoming of prior art, the object of this invention is to provide a kind of preparation method of diffusion barrier coating composition, it can make diffusion particle be uniformly dispersed, and not easily reunites, and then makes the diffusion barrier obtained have haze, high transmission rate and lasting weathering resistance.
To achieve these goals, on the one hand, the invention provides a kind of preparation method of the coating composition for forming diffusion barrier at transparent substrate surface, it comprises the steps:
(1) particle core, solvent form particle core disperse phase A;
(2) in the particle core disperse phase A of step (1), add reactive monomer and initiator, form particle core shell structure by reaction in－situ, prepare diffusion particle dispersion liquid B;
(3) in the diffusion particle dispersion liquid B described in step (2), add resin, monomer, initiator, auxiliary agent, preparation becomes diffusion barrier Coating material composition (coating fluid).
In the present invention, the material of transparent substrate can be PET, PC or PS.
In the present invention, the composition of stiffening agent comprises resin, initiator, tensio-active agent, flow agent.Resin wherein in stiffening agent can be oleoresin and/or water-base resin.
In the present invention, diffusion particle only can comprise particle core, also can comprise particle core and integument.
Accompanying drawing explanation
Fig. 1 is the digit microscope magnify 20 photo of the diffusion barrier A of embodiment 1;
Fig. 2 is the digit microscope magnify 20 photo of the diffusion barrier B of embodiment 2;
Fig. 3 is the digit microscope magnify 20 photo of the diffusion barrier C of embodiment 3;
Fig. 4 is the digit microscope magnify 20 photo of the diffusion barrier D of embodiment 4;
Fig. 5 is the digit microscope magnify 20 photo of the diffusion barrier E of embodiment 5;
Fig. 6 is the digit microscope magnify 20 photo of the diffusion barrier F of reference examples;
Fig. 7 is the particle core of diffusion particle of the present invention and the structural relation schematic diagram of integument.
Embodiment
Embodiment 1:PS wraps up silicon-dioxide
Diffusion particle dispersion liquid A:
By the silicon dioxide microparticle (system of 40.0 weight parts, commodity are called, once primary particle diameter is 5 μm) join in the dehydrated alcohol of 100 weight parts and the mixed solution of 50 weight part redistilled waters, after mechanical stirring, slowly add 3 weight part stablizer PVP successively [BASF Co., Ltd manufactures filling under nitrogen condition, trade(brand)name: VA64], be dissolved with the underpressure distillation vinylbenzene of 15 weight parts of initiator A IBN, start to be heated to 70 DEG C after stirring 10h, reaction 12h, this is diffusion particle dispersion liquid A.
Diffusion coating fluid composition:
The water-based UV resin of 37.6 weight parts, [Bayer Material Science company manufactures, trade(brand)name: UV2282], [Qing Te Chemical Co., Ltd. manufactures for the water-soluble aliphatics PUA of three-functionality-degree of 36.4 weight parts, trade(brand)name: IRR213], [Tianjin glycolylurea thatch development in science and technology company limited manufactures for the water-soluble photoinitiator of 2.5 weight parts, trade(brand)name: 819DW], [Bi Kehua length of schooling is made for the flow agent of 0.3 weight part, trade(brand)name: BYK345] be dissolved in the diffusion particle polymer fluid of 260 weight parts, stir 15 minutes, obtain diffusion coating fluid composition.
[Foshan dupont Hongji Membrane Co., Ltd manufactures above-mentioned diffusion coating fluid composition to be coated to the polyethylene terephthalate thin film that thickness is 50 micrometer optical levels, trade(brand)name: 8504] a face on, place 2min in 100 DEG C of baking ovens after, UV solidifies, obtained diffusion barrier A (as shown in Figure 1).
Embodiment 2:PS wraps up calcium carbonate
Diffusion particle dispersion liquid B:
By the calcium carbonate microparticle of 34.0 weight parts, [NEMOTO company limited manufactures, trade(brand)name: DSN-5, median size is 4.5 ~ 5.0 μm] join in the dehydrated alcohol of 100 weight parts and the mixed solution of 50 parts by weight of propylene glycol, after mechanical stirring, slowly add 3 weight part stablizer PVP successively [BASF Co., Ltd manufactures filling under nitrogen condition, trade(brand)name: VA64], be dissolved with the underpressure distillation vinylbenzene of 15 weight parts of initiator A IBN, start to be heated to 70 DEG C after stirring 10h, reaction 12h, this is diffusion particle dispersion liquid B.
Diffusion coating fluid composition:
The oiliness UV resin of 37.6 weight parts, [Sartomer Chemical Co., Ltd. manufactures, trade(brand)name: UV2282], [Sartomer Chemical Co., Ltd. manufactures for the monofunctional reactive diluent of 36.4 weight parts, trade(brand)name SR506], [Nanjing Ke Mai Chemicals company limited manufactures for the oiliness light trigger of 2.5 weight parts, trade(brand)name: 184], [Bi Kehua length of schooling is made for the flow agent of 0.3 weight part, trade(brand)name: BYK307] be dissolved in the diffusion particle polymer fluid of 260 weight parts, stir 15 minutes, obtain diffusion coating fluid composition.
[Foshan dupont Hongji Membrane Co., Ltd manufactures above-mentioned diffusion coating fluid composition to be coated to the polyethylene terephthalate thin film that thickness is 50 micrometer optical levels, trade(brand)name: 8504] a face on, place 2min in 90 DEG C of baking ovens after, through UV solidification, obtained diffusion barrier B (as shown in Figure 2).
Embodiment 3: polycarbonate parcel organosilicon
Diffusion particle dispersion liquid C:
By organic silicone microparticle [the Mitugao New Material Group manufacture of 29.0 weight parts, trade(brand)name: Tospear145, median size is 6 ~ 7 μm] join in the dehydrated alcohol of 100 weight parts and the mixed solution of 50 parts by weight of propylene glycol, after mechanical stirring, slowly add 3 weight part stablizer PVP successively [BASF Co., Ltd manufactures filling under nitrogen condition, trade(brand)name: VA64], be dissolved with underpressure distillation carbonate monomer [the Tai'an Zi Xin Chemical Co., Ltd. manufacture of 11 weight parts of initiator A IBN, trade(brand)name: propylene carbonate], start to be heated to 70 DEG C after stirring 10h, reaction 12h, this is diffusion particle dispersion liquid C.
Diffusion coating fluid composition:
The oiliness thermal-curable acrylic resin of 78 weight parts, [Dongming, Shandong SINOPEC Ke Yao Chemical Co., Ltd. manufactures, trade(brand)name: VA-1016], [Chong Jun Chemical Co., Ltd. provides for the oiliness thermal initiator of 2.5 weight parts, trade(brand)name: BPO], [Bi Kehua length of schooling is made for the flow agent of 0.3 weight part, trade(brand)name: BYK307] be dissolved in the diffusion particle polymer fluid of 237 weight parts, stir 15 minutes, obtain diffusion coating fluid composition.
[Foshan dupont Hongji Membrane Co., Ltd manufactures above-mentioned diffusion coating fluid composition to be coated to the polyethylene terephthalate thin film that thickness is 50 micrometer optical levels, trade(brand)name: 8504] a face on, be warming up to place 2min in 90 DEG C of baking ovens after at a DEG C solidification 20min, obtained diffusion barrier C (as shown in Figure 3).
Embodiment 4: organopolysiloxane parcel PMMA
Diffusion particle dispersion liquid D:
By PMMA particulate [the Mitugao New Material Group manufacture of 40.0 weight parts, trade(brand)name: KS506, median size is 4 ~ 5 μm] join in the dehydrated alcohol of 100 weight parts and the mixed solution of 50 parts by weight of propylene glycol, after mechanical stirring, slowly add 3 weight part stablizer PVP successively [BASF Co., Ltd manufactures filling under nitrogen condition, trade(brand)name: VA64], be dissolved with underpressure distillation organo-siloxane [the BASF manufacture of 11 weight parts of initiator A IBN, trade(brand)name: methyltrimethoxy silane], start to be heated to 70 DEG C after stirring 10h, reaction 12h, this is diffusion particle dispersion liquid D.
Diffusion coating fluid composition:
The oiliness thermal-curable acrylic resin of 78 weight parts, [Dongming, Shandong SINOPEC Ke Yao Chemical Co., Ltd. manufactures, trade(brand)name: VA-1016], [Chong Jun Chemical Co., Ltd. provides for the oiliness thermal initiator of 2.5 weight parts, trade(brand)name: BPO], [Bi Kehua length of schooling is made for the flow agent of 0.3 weight part, trade(brand)name: BYK307] be dissolved in the diffusion particle polymer fluid of 260 weight parts, stir 15 minutes, obtain diffusion coating fluid composition.
[Foshan dupont Hongji Membrane Co., Ltd manufactures above-mentioned diffusion coating fluid composition to be coated to the polyethylene terephthalate thin film that thickness is 50 micrometer optical levels, trade(brand)name: 8504] a face on, be warming up to place 2min in 90 DEG C of baking ovens after at a DEG C solidification 20min, obtained diffusion barrier D (as shown in Figure 4).
Embodiment 5:PMMA wraps up PC
Diffusion particle dispersion liquid D:
By the PC particle of 40.0 weight parts, [SABIC Innovative Plastics Co., Ltd. manufactures, trade(brand)name: 103R-111] join in the dehydrated alcohol of 100 weight parts and the mixed solution of 50 parts by weight of propylene glycol, after mechanical stirring, slowly add 3 weight part stablizer PVP successively [BASF Co., Ltd manufactures filling under nitrogen condition, trade(brand)name: VA64], be dissolved with underpressure distillation MMA [Britain's fine jade color peculiar limit company manufacture of 11 weight parts of initiator A IBN, trade(brand)name: MMA], start to be heated to 70 DEG C after stirring 10h, reaction 12h, this is diffusion particle dispersion liquid D.
Diffusion coating fluid composition:
The oiliness thermal-curable acrylic resin of 78 weight parts, [Dongming, Shandong SINOPEC Ke Yao Chemical Co., Ltd. manufactures, trade(brand)name: VA-1016], [Chong Jun Chemical Co., Ltd. provides for the oiliness thermal initiator of 2.5 weight parts, trade(brand)name: BPO], [Bi Kehua length of schooling is made for the flow agent of 0.3 weight part, trade(brand)name: BYK307] be dissolved in the diffusion particle polymer fluid of 260 weight parts, stir 15 minutes, obtain diffusion coating fluid composition.
[Foshan dupont Hongji Membrane Co., Ltd manufactures above-mentioned diffusion coating fluid composition to be coated to the polyethylene terephthalate thin film that thickness is 50 micrometer optical levels, trade(brand)name: 8504] a face on, be warming up to place 2min in 90 DEG C of baking ovens after at a DEG C solidification 20min, obtained diffusion barrier E (as shown in Figure 5).
Reference examples
The oiliness UV resin of 37.6 weight parts, [Sartomer Chemical Co., Ltd. manufactures, trade(brand)name: UV2282], [Sartomer Chemical Co., Ltd. manufactures the monofunctional reactive diluent of 36.4 weight parts, trade(brand)name SR506], [Nanjing Ke Mai Chemicals company limited manufactures the oiliness light trigger of 2.5 weight parts, trade(brand)name: 184], the flow agent of 0.3 weight part [make by Bi Kehua length of schooling, trade(brand)name: BYK307] join in the propylene glycol of 205 weight parts to be uniformly dispersed and be configured to hardening liquid, add [the Mitugao New Material Group manufacture of diffusion particle PMMA particulate, trade(brand)name: KS506, median size is 4 ~ 5 μm], coating composition is obtained after stirring, coating composition after configuration is applied on a face of PET, again at the dry 2min of 90 DEG C of coatings to formation, coating curing is made to form diffusion layer by uviolizing, obtained diffusion barrier F (as shown in Figure 6).
Each embodiment and the contrast of reference examples test result:
The result of anti-settling situation and sticking power is divided into: excellent, and the system participating in test, without any sedimentation phenomenon, is designated as ◎; Qualified, the system participating in test has slight sedimentation phenomenon, but does not affect system homogeneity, is designated as zero; Defective, the system participating in test has serious sedimentation phenomenon, affects system homogeneity, be designated as ▲.
Although the present invention discloses as above with preferred embodiment, and is not used to limit scope of the invention process.Any those of ordinary skill in the art, not departing from invention scope of the present invention, when doing a little improvement, namely every equal improvement done according to the present invention, should be scope of the present invention and contained.
Claims (10)
1., for forming a preparation method for the coating composition of diffusion barrier at transparent substrate surface, it comprises the steps:
(1) particle core, solvent form particle core disperse phase A;
(2) in the particle core disperse phase A described in step (1), add reactive monomer and initiator, form particle core shell structure by reaction in－situ, prepare diffusion particle dispersion liquid B;
(3) in the diffusion particle dispersion liquid B described in step (2), add resin, monomer, initiator, auxiliary agent, preparation becomes diffusion barrier coating composition.
2. preparation method as claimed in claim 1, wherein, described reactive monomer, at the surface aggregate of described particle core, forms shelly integument, and then forms the diffusion particle comprising particle core and integument, and described particle core is not identical with the material of described integument.
3. preparation method as claimed in claim 2, wherein, the mean density of described diffusion particle is ρ 3, and the mean density of the liquid portion of described diffusion barrier coating composition is ρ 4, wherein 0.8≤ρ 3/ ρ 4≤1.2.
4. preparation method as claimed in claim 2, wherein, the material of described particle core is silicon-dioxide, calcium carbonate, titanium dioxide, polymethylmethacrylate, polystyrene, polycarbonate or organopolysiloxane;
Described reactive monomer is one or more in methyl methacrylate, vinylbenzene, carbonic ether, organo-siloxane; Accordingly, the material of described integument is one or more in polymethylmethacrylate, polystyrene, polycarbonate, organopolysiloxane.
5. preparation method as claimed in claim 1, wherein, described stiffening agent is light-cured resin or heat reactive resin.
6. preparation method as claimed in claim 1, wherein, described resin is oiliness cured resin or aqueous curable resin.
7. a diffusion barrier, it comprises transparent substrate and diffusion layer, wherein,
Described diffusion layer is coated described transparent substrate surface by diffusion barrier coating composition and is formed;
Described diffusion barrier coating composition is prepared by diffusion barrier method for preparing coatings composition described one of in claim 1-6.
8. a diffusion barrier preparation method, it comprises the steps:
I, transparent substrate surface coated by the preparation method one of claim 1-6 Suo Shu obtain diffusion barrier coating composition;
II, the diffusion barrier coating composition that step I is coated with is dry and solidify.
9. diffusion barrier preparation method as claimed in claim 8, wherein, in Step II, by illumination or heating, the diffusion barrier coating composition that step I is coated with.
10. the diffusion barrier prepared by the diffusion barrier preparation method one of claim 8-9 Suo Shu.
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| CN108424691A (en) * | 2018-02-28 | 2018-08-21 | 合肥乐凯科技产业有限公司 | A kind of aqueous diffusion coating |
| CN108803155A (en) * | 2018-06-29 | 2018-11-13 | 深圳市华星光电技术有限公司 | Light spreads microballoon, encapsulation frame glue and display device |
| CN112731573A (en) * | 2020-12-30 | 2021-04-30 | 宁波长阳科技股份有限公司 | Diffusion film and preparation method thereof, backlight module and display device |
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| CN102925036A (en) * | 2012-11-01 | 2013-02-13 | 昆山乐凯锦富光电科技有限公司 | Coating composition and optical diffusion film |
| CN103275321A (en) * | 2013-05-17 | 2013-09-04 | 涌奇材料技术（上海）有限公司 | Preparation method and application of organosilicon photo-diffusion particle |
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| JP2008201864A (en) * | 2007-02-19 | 2008-09-04 | Nippon Shokubai Co Ltd | Coating composition and optical film |
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| CN108424691A (en) * | 2018-02-28 | 2018-08-21 | 合肥乐凯科技产业有限公司 | A kind of aqueous diffusion coating |
| CN108803155A (en) * | 2018-06-29 | 2018-11-13 | 深圳市华星光电技术有限公司 | Light spreads microballoon, encapsulation frame glue and display device |
| CN112731573A (en) * | 2020-12-30 | 2021-04-30 | 宁波长阳科技股份有限公司 | Diffusion film and preparation method thereof, backlight module and display device |
| CN112731573B (en) * | 2020-12-30 | 2022-08-05 | 宁波长阳科技股份有限公司 | Diffusion film and preparation method thereof, backlight module and display device |
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