WO2016099160A2 - 윈도우 필름용 조성물, 이로부터 형성된 플렉시블 윈도우 필름 및 이를 포함하는 플렉시블 디스플레이 장치 - Google Patents
윈도우 필름용 조성물, 이로부터 형성된 플렉시블 윈도우 필름 및 이를 포함하는 플렉시블 디스플레이 장치 Download PDFInfo
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- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
- C08L83/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
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- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
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- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
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- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
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- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Definitions
- the present invention relates to a composition for a window film, a flexible window film formed therefrom, and a flexible display device including the same.
- Flexible display devices having flexibility to be folded and unfolded in display devices have been developed.
- Flexible display devices are thin, light, impact resistant, and can be folded and unfolded to produce a variety of forms.
- the window film is located at the outermost side of the display device, it should be excellent in flexibility, high hardness, and optical reliability.
- the window film is prepared by coating and curing the composition for the window film on the base layer, curling may occur.
- the problem to be solved by the present invention is to provide a composition for a window film that can implement a flexible window film with low curl.
- Another object of the present invention is to provide a composition for a window film that can implement a flexible window film having excellent optical reliability such as hardness, flexibility and light resistance.
- Another object of the present invention is to provide a flexible window film having a low curl and excellent optical reliability such as hardness, flexibility and light resistance, and a flexible display device including the same.
- composition for a window film of the present invention comprises a siloxane resin or a mixture thereof, a crosslinking agent and an initiator including the following formula (1) or (2), wherein the crosslinking agent is about 10 parts by weight based on 100 parts by weight of the siloxane resin or a mixture thereof Parts to about 30 parts by weight:
- the flexible window film of the present invention includes a base layer and a coating layer formed on one surface of the base layer, wherein the flexible window film has a curl of about 1.0 mm or less, and the coating layer may be formed of the composition for the window film.
- the flexible display device of the present invention may include the flexible window film.
- the present invention provides a composition for a window film that can implement a flexible window film with low curl.
- the present invention provides a composition for a window film that can implement a flexible window film having excellent optical reliability such as hardness, flexibility, and light resistance.
- the present invention provides a flexible window film having a low curl and excellent optical reliability such as hardness, flexibility and light resistance, and a flexible display device including the same.
- FIG. 1 is a cross-sectional view of a flexible window film according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of a flexible window film according to another embodiment of the present invention.
- FIG 3 is a cross-sectional view of a flexible display device according to an embodiment of the present invention.
- FIG. 4 is a cross-sectional view according to an exemplary embodiment of the display unit of FIG. 3.
- FIG. 5 is a cross-sectional view of a flexible display device according to another exemplary embodiment of the present invention.
- FIG. 6 is a cross-sectional view of a flexible display device according to still another embodiment of the present invention.
- pencil hardness is measured by the JIS K5400 method using a pencil hardness tester (Heidon) for the coating layer of the window film.
- Heidon pencil hardness tester
- the load of the pencil on the coating layer was 1 kg
- the angle at which the pencil was drawn was 45 °
- the speed at which the pencil was drawn was 60 mm / min. If the scratch occurs more than one time to evaluate five times, the pencil hardness is measured using the pencil of the step below, the five times the five times the maximum pencil hardness value when there is no scratch.
- the "curvature radius” is wound around the window film test piece, the curvature radius test JIG (CFT-200R, COVOTECH Co., Ltd.), keep the wound state for 5 seconds, unwind the test piece, and visually determine whether cracks have occurred in the test piece It means the minimum radius of JIG where no crack occurs.
- the radius of curvature in the compression direction is measured by the contact of the coating layer in the window film with the JIG surface, and the radius of curvature in the tensile direction is measured by the contact of the base layer in the window film with the JIG.
- the window film test piece may have a thickness of 50 ⁇ m to 300 ⁇ m.
- ⁇ YI measures a yellow index (Y1) using a color difference meter (CM3600D, Konica Minolta) under a D65 light source at 2 ° (angle of the window film and the light source) for the window film.
- C3600D color difference meter
- Konica Minolta color difference meter
- Y2 yellow index
- curing refers to FIG. 7 and places the window film 1 on the bottom surface 2 so that the substrate layer faces the bottom surface 2 at 22 ° C. to 28 ° C. and 30% to 50% relative humidity.
- the average value of the highest height H from the bottom surface 2 to the window film 1 is meant.
- (meth) acryl refers to acrylic and / or methacryl.
- “Substituted” in this specification unless specifically mentioned, the hydroxyl group of one or more hydrogen atoms of the functional group, unsubstituted C1 to C10 alkyl group, C1 to C10 alkoxy group, C3 to C10 cycloalkyl group, C6 to C20 aryl It means substituted with a C6 to C10 alkyl group substituted with a group, a C7 to C20 arylalkyl group, a benzophenone group, a C1 to C10 alkyl group substituted with a C6 to C20 aryl group, or a C1 to C10 alkoxy group.
- crosslinkable functional group means a functional group that crosslinks by heat and / or light.
- a crosslinkable functional group means an epoxy group, an epoxy group containing group, a glycidyl group, a glycidyl group containing group, a glycidoxy group, a glycidoxy group containing group, an oxetanyl group, an oxetanyl group containing group, etc.
- the crosslinkable functional group is an epoxy group; Glycidyl groups; Glycidoxy group; Oxetanyl group; Oxetanyloxy group; C1 to C20 alkyl group having an epoxy group, glycidyl group, glycidoxy group, epoxidized C5 to C20 cycloalkyl group, epoxidized C1 to C10 alkyl group, oxetanyl group or oxetanyloxy group; C5 to C20 cycloalkyl group having an epoxy group, glycidyl group, glycidoxy group, epoxidized C5 to C20 cycloalkyl group, epoxidized C1 to C10 alkyl group, oxetanyl group or oxetanyloxy group,
- a "crosslinkable functional group" can be unsubstituted or substituted.
- UV absorption functional group means a functional group that absorbs light having a wavelength of about 400 nm or less, specifically about 100 nm to about 400 nm.
- the UV absorbing functional group is an unsubstituted or substituted benzotriazole group, an unsubstituted or substituted benzophenone group, an unsubstituted or substituted hydroxypxphenone group, an unsubstituted or substituted group Triazine groups, unsubstituted or substituted salicylate groups, unsubstituted or substituted cyanoacrylate groups, unsubstituted or substituted oxanilide groups, unsubstituted Or a substituted hydroxyphenyltriazine group, an unsubstituted or substituted hydroxyphenylbenzotriazole group, or an unsubstituted or substituted hydroxyphenylbenzophenone group, This is not restrictive.
- alkyleneoxy group means an alkylene group having oxygen (O) in the terminal or molecule.
- halogen means fluorine, chlorine, bromine or iodine.
- Ec is a (3,4-epoxycyclohexyl) ethyl group
- Gp is a 3-glycidoxypropyl group
- Op is a 3-oxetanylpropyl group
- Me is a methyl group.
- Composition for a window film comprises a siloxane resin or a mixture thereof, a crosslinking agent and an initiator comprising the following formula (1) or (2), the crosslinking agent is based on 100 parts by weight of the siloxane resin or a mixture thereof About 10 parts by weight to about 30 parts by weight may be included:
- R 1 is a crosslinkable functional group
- R 2 is an ultraviolet absorbing functional group or ultraviolet absorbing functional group-containing group
- 0 ⁇ x ⁇ 1, 0 ⁇ y ⁇ 1, x + y 1)
- R 1 is a crosslinkable functional group
- R 2 is a UV absorbing functional group or a UV absorbing functional group-containing group
- the composition for a window film according to the present embodiment may include a siloxane resin or a mixture thereof including Formula 1 or Formula 2, thereby increasing hardness and flexibility of the window film and increasing optical reliability such as light resistance.
- the composition for a window film according to the present embodiment can facilitate the adjustment of optical reliability, such as hardness and flexibility of the window film, light resistance.
- optical reliability such as hardness and flexibility of the window film, light resistance.
- the hardness, flexibility and light resistance of the window film in the above range may be good.
- R 1 may provide crosslinkability to the composition for a window film.
- R 1 is a (3,4-epoxycyclohexyl) methyl ((3,4-epoxycyclohexyl) methyl) group, (3,4-epoxycyclohexyl) ethyl ((3,4-epoxycyclohexyl) ethyl) group, (3,4-epoxycyclohexyl) propyl ((3,4-epoxycyclohexyl) propyl) group, 3-glycidoxypropyl group, 3-oxetanylmethyl group, 3-oxetanylethyl group, 3-oxetanylpropyl group, or 3-oxetanyloxy group ), And the like.
- R 2 contributes to ultraviolet absorption, and specifically, may be an unsubstituted or substituted hydroxybenzophenone group, an unsubstituted or substituted hydroxyphenyltriazine group,
- R x is an unsubstituted or substituted C1 to C20 alkylene group, an unsubstituted or substituted C1 to C20 alkyleneoxy group, terminal or functional group in the urethane bond
- n1, n2 are each independently 0 or 1
- R y is unsubstituted or substituted benzotriazole group, unsubstituted or substituted be
- R x may be an unsubstituted or substituted C1 to C20 alkylene group or an unsubstituted or substituted C1 to C20 alkyleneoxy group.
- M can be oxygen (O) or -OCONH-.
- R y may be an unsubstituted or substituted hydroxybenzophenone group, or an unsubstituted or substituted hydroxyphenyltriazine group.
- R y is a 2-hydroxybenzophenone group, a 2,4-dihydroxybenzophenone group, a 2,2'-dihydroxybenzophenone group, a 2-hydroxy-4-methoxybenzophenone group , 2-hydroxy-4-methoxy-4'-methylbenzophenone group, 2,2'-dihydroxy-4-methoxybenzophenone group, 2,4,4'-trihydroxybenzophenone group, 2,2 ', 4,4'-tetrahydroxybenzophenone group, 2,3,4,4'-tetrahydroxybenzophenone group, 2,3'4,4'-tetrahydroxybenzophenone group or 2 , 2'-dihydroxy-4,4'-dimethoxybenzophenone group, the formula 3-1 and the like:
- R 3 and R 4 may provide crosslinkability and flexibility to the composition for a window film.
- R 3 may be an unsubstituted or substituted C1 to C20 alkyl group
- R 4 may be a crosslinkable functional group. At this time, the crosslinkability of the composition for a window film can be further improved, and the hardness of a window film can be improved further.
- R 3 and R 4 each independently represent a (3,4-epoxycyclohexyl) methyl group, a (3,4-epoxycyclohexyl) ethyl group, a (3,4-epoxycyclohexyl) propyl group, and glycidoxy Propyl group, methyl group, ethyl group, n-propyl group or isopropyl group.
- the siloxane resin of the present embodiment including Formula 1 may include any one of Formulas 1-1 to 1-13, but is not limited thereto.
- Ra is the following Formula i
- Rb is the following Formula ii
- Rc is the following Formula iii
- Rd is the following Formula iv)
- the siloxane resin of the present embodiment including Formula 2 may include any one of the following Formulas 2-1 to 2-36, but is not limited thereto:
- Ra is Chemical Formula i
- Rb is Chemical Formula ii
- Rc is Chemical Formula iii
- Rd is Chemical Formula iv
- 0 ⁇ x ⁇ 1, 0 ⁇ y. ⁇ 1, 0 ⁇ z ⁇ 1, x + y + z 1).
- the siloxane resin comprising Formula 1 or Formula 2 may have a weight average molecular weight of about 4,000 to about 100,000, specifically about 4,500 to about 10,000, more specifically about 5,000 to about 7,000. In the above range, not only the siloxane resin may be easily manufactured, but also hardness, flexibility, and light resistance may be excellent.
- the siloxane resin of Formula 1 or Formula 2 has a polydispersity (PDI) of about 1.0 to 3.0, specifically about 1.5 to 2.5, epoxy equivalent weight of about 0.1 mol / 100g to about 1.0 mol / 100g, specifically about 0.3 mol / 100g To about 0.7 mol / 100 g. In the above range, the coating properties of the window film may have a stable effect.
- the crosslinking agent can further increase the hardness of the window film by containing a crosslinkable functional group.
- the crosslinking agent may be included in an amount of about 10 parts by weight to about 30 parts by weight based on 100 parts by weight of the siloxane resin or a mixture thereof. Within this range, it is possible to produce a window film having low curl and excellent hardness and flexibility.
- the crosslinking agent may comprise one or more of non-cyclic aliphatic epoxy monomers, cyclic aliphatic epoxy monomers, aromatic epoxy monomers, hydrogenated aromatic epoxy monomers, oxetane monomers.
- Crosslinking agents may be included alone or in combination.
- the crosslinker is an epoxy monomer
- the epoxy equivalent may be from about 0.5 mol / 100 g to about 1.0 mol / 100 g. In the above range, the flexibility and hardness of the coating layer may be effective.
- the crosslinker may have a molecular weight of about 200 g / mol to about 400 g / mol. In the above range, the flexibility and hardness of the coating layer may be effective.
- Non-cyclic aliphatic epoxy monomers include 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, and neo Pentyl glycol diglycidyl ether, trimethylolpropane triglycidyl ether, polyethyleneglycol diglycidyl ether, glycerine triglycidyl ether, glycerin triglycidyl ether Polypropyleneglycol diglycidyl ether; Polyglycidyl ethers of polyether polyols obtained by adding one or two or more alkylene oxides to aliphatic polyhydric alcohols such as ethylene glycol, propylene glycol and glycerin; Diglycidyl esters of aliphatic long-chain dibasic acids; Monoglycidyl ethers of aliphatic higher alcohols; Glycidyl ethers of higher fatty acids; Epoxid
- the cyclic aliphatic epoxy monomer is a compound having one or more epoxy groups in the alicyclic group, and may include an alicyclic epoxy carboxylate or an alicyclic epoxy (meth) acrylate.
- the cyclic aliphatic epoxy monomer is (3,4-epoxycyclohexyl) methyl-3 ', 4'-epoxycyclohexanecarboxylate ((3,4-epoxycyclohexyl) methyl-3', 4'-epoxycyclohexanecarboxylate) , 3,4-epoxy-6-methylcyclohexylmethyl-3 ', 4'-epoxy-6'-methylcyclohexanecarboxylate (3,4-epoxy-6-methylcyclohexylmethyl-3', 4'-epoxy- 6'-methylcyclohexanecarboxylate), diglycidyl 1,2-cyclohexanedicarboxylate, bis (3,4-epoxy
- Aromatic epoxy monomers include bisphenol type epoxy resins such as diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol S, and the like; Novolac type epoxy resins such as phenol novolac epoxy resins, cresol novolac epoxy resins, hydroxybenzaldehyde phenol novolac epoxy resins; Glycidyl ethers of tetrahydroxyphenylmethane, glycidyl ethers of tetrahydroxybenzophenone, polyfunctional epoxy resins such as epoxidized polyvinyl phenol, and the like.
- bisphenol type epoxy resins such as diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol S, and the like
- Novolac type epoxy resins such as phenol novolac epoxy resins, cresol novolac epoxy resins, hydroxybenzaldehyde phenol novolac epoxy
- Hydrogenated aromatic epoxy monomer means the monomer obtained by selectively hydrogenating an aromatic epoxy monomer under pressure in presence of a catalyst.
- the aromatic epoxy monomer for the hydrogenated aromatic epoxy monomer may include the aromatic epoxy monomer described above.
- Oxetane monomers include 3-methyloxetane, 2-methyloxetane, 2-ethylhexyloxetane, 3-oxetanol, 2- Methyleneoxetane, 3,3-oxetanedimethanethiol, 4- (3-methyloxetane-3-yl) benzonitrile (4- (3-methyloxetan- 3-yl) benzonitrile), N- (2,2-dimethylpropyl) -3-methyl-3-oxetanemethaneamine (N- (2,2-dimethylpropyl) -3-methyl-3-oxetanmethaneamine), N- (1,2-dimethylbutyl) -3-methyl-3-oxetanemethaneamine (N- (1,2-dimethylbutyl) -3-methyl-3-oxetanmethaneamine), (3-ethyloxetan-3-yl) Methyl (meth)
- the initiator can cure the siloxane resin and the crosslinking agent described above.
- the initiator may comprise one or more of a photocationic initiator, a photoradical initiator.
- the initiator may be used alone or in combination of two or more thereof.
- Photocationic initiators can be used those commonly known to those skilled in the art.
- the photocationic initiator may use an onium salt containing a cation and an anion.
- the cation is diphenyliodonium, 4-methoxydiphenyliodonium, bis (4-methylphenyl) iodonium, bis (4-tert- Butylphenyl) iodium (bis (4-tert-butylphenyl) iodonium), bis (dodecylphenyl) iodonium), (4-methylphenyl) [(4- (2-methylpropyl) phenyl) Diaryl iodonium, triphenylsulfonium, and diphenyl-4-thiophenylphenylsulfonium, such as iodonium (4-methylphenyl) [(4- (2-methylpropyl) phenyl) iodonium] triarylsulfonium such as thioph
- the anion is phosphate (PF 6 -) hexafluoropropane, borates (BF 4 -) tetrafluoroborate, antimonate hexafluorophosphate (SbF 6 -), are Senate hexafluorophosphate (AsF 6 -), hexamethylene Chloro antimonate (SbCl 6 ⁇ ) and the like.
- the photoradical initiator may be one known to those skilled in the art.
- the optical radical initiator may use at least one of thioxanthone, phosphorus, triazine, acetophenone, benzophenone, benzoin and oxime.
- the initiator may be included in about 0.01 parts by weight to about 20 parts by weight, specifically about 1 part by weight to about 10 parts by weight, based on 100 parts by weight of the siloxane resin or a mixture thereof.
- the siloxane resin can be sufficiently cured, and a residual amount of initiator can be left to prevent the transparency of the window film from decreasing.
- the composition for a window film according to the present embodiment may further include nanoparticles.
- Nanoparticles can further increase the hardness of the window film.
- Nanoparticles may include, but are not limited to, one or more of silica, aluminum oxide, zirconium oxide, titanium oxide.
- Nanoparticles may be surface treated with a silicone compound for mixing with the siloxane resin.
- Nanoparticles are not limited in shape and size. Specifically, the nanoparticles may include particles having a spherical shape, a plate shape, an amorphous shape, and the like.
- the nanoparticles may have an average particle diameter of about 1 nm to about 200 nm, specifically about 10 nm to about 50 nm.
- the hardness of the window film can be increased without affecting the surface roughness and transparency of the window film.
- the nanoparticles may be included in an amount of about 0.1 part by weight to about 60 parts by weight, specifically about 10 parts by weight to about 50 parts by weight, based on 100 parts by weight of the siloxane resin or a mixture thereof. In the above range, the hardness of the window film can be increased without affecting the surface roughness and transparency of the window film.
- the composition for a window film according to the present embodiment may further include an additive.
- the additive may provide additional functionality to the window film.
- the additives may include additives that are typically added to the window film.
- the additive may include, but is not limited to, UV absorbers, reaction inhibitors, adhesion enhancers, thixotropy agents, conductivity granters, colorant, stabilizers, antistatic agents, antioxidants, leveling agents.
- Ethynylcyclohexane may be used as a reaction inhibitor
- an silane compound having an epoxy or alkoxysilyl group may be used as the adhesion improving agent
- fumed silica may be used as the thixotropic agent.
- UV absorber can increase the light resistance of the window film.
- UV absorbers can be used conventional absorbents known to those skilled in the art.
- the UV absorber may be, but is not limited to, a UV absorber of triazine, benzimidazole, benzophenone, benzotriazole, and hydroxyphenyltriazine.
- the additive may be included in an amount of about 0.01 parts by weight to about 5 parts by weight, specifically about 0.1 parts by weight to about 2.5 parts by weight, based on 100 parts by weight of the siloxane resin or a mixture thereof. In the above range can improve the hardness and flexibility of the window film and implement the additive effect.
- composition for a window film according to the present embodiment may further include a solvent in order to facilitate coating, coatability, or processability.
- Solvents may include, but are not limited to, methylethylketone, methylisobutylketone, propyleneglycolmonomethyletheracetate, and the like.
- composition for a window film according to the present embodiment may have a viscosity of about 50 cP to about 2000 cP at 25 ° C.
- the window film may be easily formed in the above range.
- the siloxane resin comprising Formula 1 may be formed by hydrolysis and condensation reaction of the first silicon monomer alone or a monomer mixture comprising the first silicon monomer and the second silicon monomer.
- the first silicon monomer may be included in about 20 mol% to about 99.9 mol%, specifically about 20 mol% to about 99 mol%, more specifically about 80 mol% to about 99 mol% in the monomer mixture.
- the second silicon monomer may be included in about 0.1 mol% to about 80 mol%, specifically about 1 mol% to about 80 mol%, more specifically about 1 mol% to about 20 mol% in the monomer mixture.
- any one of the first silicon monomers is at least about 70 mol% and less than about 100 mol%, at least about 80 mol% and less than about 100 mol%, about 85 mol% to about 99 mol%, and the other of the first silicon monomers is about 0 mol% Greater than about 30 mol%, greater than about 0 mol% and less than 20 mol%, and from about 1 mol% to 15 mol%. In the above range, the hardness and light resistance of the window film may be good.
- the first silicon monomer may be represented by the following Chemical Formula 4, and the second silicon monomer may be a silane compound represented by the following Chemical Formula 5. These may be used alone or in combination:
- R 1 is as defined in Formula 1, and R 5 , R 6 and R 7 are each independently a halogen, a hydroxyl group or a C1 to C10 alkoxy group).
- R 2 is as defined in Chemical Formula 1, and R 8 , R 9 and R 10 are each independently a halogen, a hydroxyl group, or an alkoxy group of C1 to C10).
- the first silicon monomer is 2- (3,4-epoxycyclohexyl) ethyltriethoxysilane (2- (3,4-epoxycyclohexyl) ethyltriethoxysilane), 2- (3,4-epoxycyclohexyl) ethyltri 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane), 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane 3-oxetanylmethyltrimethoxysilane, 3-oxetanylethyltrimethoxysilane, 3-oxetanylpropyltrimethoxysilane, 3-oxetanylmethyltrimethoxysilane It may include, but is not limited to, one or more of 3-oxetanyloxytrimethoxysilane
- the second silicon monomer can be prepared by reacting alkoxysilane with benzophenone having two or more hydroxy groups.
- benzophenones having two or more hydroxy groups include 2,2'-dihydroxybenzophenone, 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2 , 2'-dihydroxy-4-methoxy-4'-methylbenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,4,4'-trihydroxybenzophenone, 2 , 2 ', 4,4'-tetrahydroxybenzophenone, 2,3,4,4'-tetrahydroxybenzophenone, 2,3'4,4'-tetrahydroxybenzophenone, or 2,2' -Dihydroxy-4,4'-dimethoxybenzophenone.
- the alkoxysilane may include an alkoxysilane compound having 1 to 3 alkoxy groups of C1 to C5. Benzophenone and alkoxysilane having two or more hydroxy groups can be reacted in a molar ratio of 1: 1 to 1: 1.5.
- the platinum catalyst mentioned above can also be used in order to raise reaction efficiency.
- the second silicon monomer may be prepared by reacting a UV absorber known to those skilled in the art with an alkoxysilane having a functional group capable of reacting with the UV absorber.
- the UV absorber is hydroxyphenyltriazine series such as Tinuvin 400, Tinuvin 405, Tinuvin 460, Tinuvin 479; Hydroxyphenylbenzotriazole series such as Tinuvin 99, Tinuvin 99-2, Tinuvin 171, Tinuvin 328, Tinuvin 384-2, Tinuvin 900, Tinuvin 928, Tinuvin 1130, Tinuvin 5050, Tinuvin 5060, Tinuvin 5151, and Tinuvin P; Benzophenone series, such as Chimassorb 81 and Chimassorb 90, etc. are mentioned, It is not limited to this.
- the alkoxysilane may include a trialkoxysilane having an isocyanate group.
- the trialkoxysilane may contain a C1 to C10 alkyl group having an isocyanate group, and a C1 to C10 alkoxy group.
- the trialkoxysilane can be 3- (triethoxysilyl) propylisocyanate.
- the reaction of the UV absorber with the trialkoxysilane may be carried out in the solvent at about 20 ° C. to about 80 ° C. for about 1 hour to about 12 hours.
- a solvent can use organic solvents, such as tetrahydofuran.
- the reaction between the UV absorber and the trialkoxysilane can be used to increase the reaction yield
- a catalyst such as dibutyltin dilaurate (dibutyltin dilaurate)
- the second silicon monomer may use a commercially available product.
- the second silicone monomer may include 2-hydroxy-4- (3-triethoxysilylpropoxy) diphenylketone, and the like, This is not restrictive.
- the hydrolysis and condensation reaction of the monomer mixture can be carried out according to the conventional method for producing siloxane resin.
- Hydrolysis may comprise mixing the first silicon monomer alone or the first silicon monomer and the second silicon monomer and reacting in water and a mixture of one or more of the desired acids, bases.
- the acid is a strong acid, specifically HCl, HNO 3
- the base may be a strong base specifically NaOH, KOH and the like.
- Hydrolysis may be performed at about 20 ° C. to about 100 ° C. for about 10 minutes to about 7 hours. It is possible to increase the hydrolysis efficiency of the silicone monomer in the above range.
- the condensation reaction may be performed at about 20 ° C. to about 100 ° C.
- Platinum catalysts include vinylalkylsilane platinum complex, platinum black, chloroplatinic acid, chloroplatinic acid-olefin complex, and chloroplatinic acid-alcohol coordination, including Karstedt catalyst. Compounds (chloroplatinic acid-alcohol complex), or mixtures thereof may be used.
- the siloxane resin of the present embodiment including Chemical Formula 2 may be formed by hydrolyzing and condensing a monomer mixture including a first silicon monomer, a second silicon monomer, and a third silicon monomer.
- the first silicon monomer may be included in about 40 mol% to about 99 mol%, specifically about 80 mol% to about 98 mol% in the monomer mixture.
- the second silicon monomer may be included in about 0.1 mol% to about 20 mol%, specifically about 0.1 mol% to about 10 mol%, more specifically about 1 mol% to about 10 mol% in the monomer mixture.
- the third silicon monomer may be included in about 0.1 mol% to about 40 mol%, specifically about 0.5 mol% to about 10 mol%, more specifically about 1 mol% to about 10 mol% in the monomer mixture.
- the first to third silicone monomers may have the effect of improving the flexibility, hardness and light resistance of the window film in the above range.
- the first silicon monomer may be represented by Chemical Formula 4
- the second silicon monomer may be represented by Chemical Formula 5
- the third silicon monomer may be a silane compound represented by Chemical Formula 6.
- R 3 and R 4 are as defined in Chemical Formula 2, and R 11 and R 12 are each independently a halogen, a hydroxyl group, or an alkoxy group of C1 to C10).
- the third silicon monomer is 2- (3,4-epoxycyclohexyl) ethylmethyldiethoxysilane (2- (3,4-epoxycyclohexyl) ethylmethyldiethoxysilane), dimethyldimethoxysilane, (3-glycidyl) (3-glycidoxypropyl) methyldiethoxysilane, ethylmethyldiethoxysilane may include one or more of, but is not limited thereto.
- FIG. 1 is a cross-sectional view of a flexible window film according to an embodiment of the present invention.
- the flexible window film 100 includes a base layer 110 and a coating layer 120, the coating layer 120 for a window film according to an embodiment of the present invention It can be formed into a composition.
- the flexible window film 100 may have a curl of about 1.0 mm or less. In the above range, less curl can be used as a flexible window film.
- the flexible window film 100 may have a pencil hardness of about 7H or more, a radius of curvature of about 5.0 mm or less, and a ⁇ Y.I. of about 5.0 or less. Within this range, the hardness, flexibility, and light resistance are good and can be used as the flexible window film. Specifically, the flexible window film 100 may have a pencil hardness of about 7H to 9H, a radius of curvature of about 0.1mm to about 5.0mm, and ⁇ Y.I. about 0.1 to about 5.0.
- the base layer 110 may support the flexible window film 100 and the coating layer 120 to increase the mechanical strength of the flexible window film 100.
- the base layer 110 may be attached onto the display unit, the touch screen panel, or the polarizer by an adhesive layer.
- the base layer 110 may be formed of an optically transparent and flexible resin.
- the resins include polyester resins including polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polybutylene naphthalate and the like, polycarbonate resins, polyimide resins, polystyrene resins, polymethylmethacrylates, and the like. It may include one or more of the poly (meth) acrylate resin.
- the resin may be included alone or in combination.
- the base layer 110 may have a thickness of about 10 ⁇ m to about 200 ⁇ m, specifically about 20 ⁇ m to about 150 ⁇ m, and more specifically about 50 ⁇ m to about 100 ⁇ m. It can be used for the flexible window film in the above range.
- the coating layer 120 may be formed on the base layer 110 to protect the base layer 110, the display unit, the touch screen panel, or the polarizing plate, and may be used in a flexible display device having high flexibility and high hardness.
- the coating layer 120 may have a thickness of about 5 ⁇ m to about 100 ⁇ m, specifically about 10 ⁇ m to about 80 ⁇ m. It can be used for the flexible window film in the above range.
- another surface of the coating layer 120 may further include a functional surface layer such as an antireflection layer, an antiglare layer, a hard coating layer, and provide additional functions to the flexible window film.
- the coating layer 120 may be further formed on the other surface of the substrate layer 110.
- the flexible window film 100 is optically transparent and can be used in a transparent display device.
- the flexible window film 100 may have a transmittance of about 88% or more and specifically about 88% to about 100% in the visible light region, specifically, the wavelength of 400 nm to 800 nm. It can be used as a flexible window film in the said range.
- the flexible window film 100 may have a thickness of about 50 ⁇ m to about 300 ⁇ m. It can be used as a flexible window film in the said range.
- the flexible window film 100 may be manufactured by a method of manufacturing a flexible window film including coating and curing a composition for a window film according to embodiments of the present invention on a base layer 110.
- the method of coating the composition for a window film on the base layer 110 is not particularly limited.
- it may be bar coating, spin coating, dip coating, roll coating, flow coating, die coating, or the like.
- the composition for the window film may be coated on the base layer 110 in a thickness of about 5 ⁇ m to about 100 ⁇ m. It is possible to secure the desired coating layer in the above range and may be excellent in hardness and flexibility, reliability.
- Curing is to form a coating layer by curing the composition for a window film, and may include at least one of photocuring and thermal curing.
- Photocuring may involve irradiation with light intensity of about 10 mJ / cm 2 to about 1000mJ / cm 2 at a wavelength of 400nm or less.
- Thermal curing may include treatment at about 40 ° C. to about 200 ° C. for about 1 hour to about 30 hours.
- the composition for a window film may be sufficiently cured. For example, it may be thermally cured after photocuring, and as a result, the hardness of the coating layer may be further increased.
- the composition for the window film may further comprise the step of drying.
- drying By curing after drying, it is possible to prevent the surface roughness of the coating layer from increasing due to prolonged photocuring and thermal curing. Drying may be performed at about 40 ° C. to about 200 ° C. for about 1 minute to about 30 hours, but is not limited thereto.
- FIG. 2 is a cross-sectional view of a flexible window film according to another embodiment of the present invention.
- the flexible window film 200 is a base layer 110, a coating layer 120 formed on one surface of the base layer 110, and an adhesive formed on the other surface of the base layer 110.
- the coating layer 120 may be formed of a composition for a window film according to an embodiment of the present invention.
- the flexible window film 200 may have a curl of about 1.0 mm or less, a pencil hardness of 7H or more, a radius of curvature of about 5.0 mm or less, and ⁇ Y.I. of about 5.0 or less. Within this range, the hardness, flexibility, and light resistance are good and can be used as the flexible window film.
- the adhesive layer 130 is further formed on the other surface of the base layer 110 to facilitate adhesion between the flexible window film and the touch screen panel, the polarizing plate, or the display unit. Except that the adhesive layer is further formed is substantially the same as the flexible window film according to an embodiment of the present invention. Therefore, below, only an adhesion layer is demonstrated.
- the adhesive layer 130 may adhere to a polarizing plate, a touch screen panel, or a display unit that may be disposed below the flexible window film 200, and may be formed of a composition for an adhesive layer.
- the pressure-sensitive adhesive layer 130 may be formed of a pressure-sensitive adhesive layer containing a pressure-sensitive resin, such as (meth) acrylic resin, urethane resin, silicone resin, epoxy resin, curing agent, photoinitiator, silane coupling agent.
- the (meth) acrylic resin is a (meth) acrylic copolymer having an alkyl group, a hydroxyl group, an aromatic group, a carboxylic acid group, an alicyclic group, a heteroalicyclic group, or the like, and may include a conventional (meth) acrylic copolymer.
- a (meth) acrylic monomer having a C1 to C10 unsubstituted alkyl group a (meth) acrylic monomer having a C1 to C10 alkyl group having at least one hydroxyl group, a (meth) acrylic monomer having a C6 to C20 aromatic group , (Meth) acrylic monomer having a carboxylic acid group, (meth) acrylic monomer having a C3 to C20 alicyclic group, C3 to C10 heteroalicyclic having at least one of nitrogen (N), oxygen (O), sulfur (S) It may be formed of a monomer mixture including at least one of the (meth) acrylic monomer having a group.
- the curing agent is a polyfunctional (meth) acrylate, such as bifunctional (meth) acrylates such as hexanediol diacrylate; Trifunctional (meth) acrylate of trimethylolpropane tri (meth) acrylate; Tetrafunctional (meth) acrylates such as pentaerythritol tetra (meth) acrylate; 5-functional (meth) acrylates such as dipentaerythritol penta (meth) acrylate; 6 functional (meth) acrylates, such as dipentaerythritol hexa (meth) acrylate, may be included, but is not limited thereto.
- the photoinitiator may include the photoradical initiator described above as a conventional photoinitiator.
- the silane coupling agent may include a silane coupling agent having an epoxy group such as 3-glycidoxypropyltrimethoxysilane and the like.
- the adhesive layer composition may include 100 parts by weight of a (meth) acrylic resin, about 0.1 part by weight to about 30 parts by weight of a curing agent, about 0.1 part by weight to about 10 parts by weight of a photoinitiator, and about 0.1 part by weight to about 20 parts by weight of a silane coupling agent. have.
- the flexible window film may be attached well on the display unit, the touch screen panel or the polarizing plate.
- the adhesive layer 130 may have a thickness of about 10 ⁇ m to about 100 ⁇ m.
- Optical elements such as a flexible window film and a polarizing plate, can fully be adhere
- FIGS. 3 and 4 are cross-sectional views of a flexible display device according to an embodiment of the present invention
- FIG. 4 is a cross-sectional view of an embodiment of the display unit of FIG. 3.
- the flexible display device 300 may include a display unit 350a, an adhesive layer 360, a polarizer 370, a touch screen panel 380, and a flexible window film 390.
- the flexible window film 390 may include a flexible window film according to embodiments of the present invention.
- the display unit 350a is for driving the flexible display apparatus 300 and may include an optical element including a substrate and an OLED, an LED, or an LCD element formed on the substrate.
- 4 is a cross-sectional view according to an exemplary embodiment of the display unit of FIG. 3.
- the display 350a may include a lower substrate 310, a thin film transistor 316, an organic light emitting diode 315, a planarization layer 314, a passivation layer 318, and an insulating layer 317. have.
- the lower substrate 310 supports the display unit 350a, and the thin film transistor 316 and the organic light emitting diode 315 may be formed on the lower substrate 310.
- a flexible printed circuit board (FPCB) for driving the touch screen panel 380 may be formed on the lower substrate 310.
- the flexible printed circuit board may further include a timing controller, a power supply, and the like for driving the organic light emitting diode array.
- the lower substrate 310 may include a substrate formed of a flexible resin.
- the lower substrate 310 may include a flexible substrate such as a silicon substrate, a polyimide substrate, a polycarbonate substrate, a polyacrylate substrate, but is not limited thereto. .
- a plurality of pixel areas are defined by crossing a plurality of driving wires (not shown) and sensor wires (not shown), and the thin film transistor 316 and the thin film transistor 316 are defined for each pixel area.
- the organic light emitting diode array including the organic light emitting diode 315 connected to the) may be formed.
- a gate driver for applying an electrical signal to the driving line may be formed in the form of a gate in panel.
- the gate-in panel circuit unit may be formed on one side or both sides of the display area.
- the thin film transistor 316 controls the current flowing through the semiconductor by applying an electric field perpendicular to the current, and may be formed on the lower substrate 310.
- the thin film transistor 316 may include a gate electrode 310a, a gate insulating layer 311, a semiconductor layer 312, a source electrode 313a, and a drain electrode 313b.
- the thin film transistor 316 is an oxide thin film transistor using an oxide such as indium gallium zinc oxide (IGZO), ZnO, or TiO as the semiconductor layer 312, an organic thin film transistor using an organic material as the semiconductor layer, and amorphous silicon as the semiconductor layer. It may be an amorphous silicon thin film transistor to be used, or a polycrystalline silicon thin film transistor to use polycrystalline silicon as a semiconductor layer.
- the planarization layer 314 may cover the thin film transistor 316 and the circuit portion 310b to planarize the top surfaces of the thin film transistor 316 and the circuit portion 310b so that the organic light emitting diode 315 may be formed.
- the planarization layer 314 may be formed of a spin-on-glass (SOG) film, a polyimide polymer, a polyacrylic polymer, or the like, but is not limited thereto.
- the organic light emitting diode 315 implements a display by emitting light by itself, and may include a first electrode 315a, an organic light emitting layer 315b, and a second electrode 315c which are sequentially stacked. Adjacent organic light emitting diodes may be distinguished through the insulating layer 317.
- the organic light emitting diode 315 may include a bottom light emitting structure in which light generated in the organic light emitting layer 315b is emitted through the lower substrate, or a top light emitting structure in which light generated in the organic light emitting layer 315b is emitted upward.
- the passivation layer 318 may cover the organic light emitting diode 315 to protect the organic light emitting diode 315.
- the passivation layer 318 may be formed of an inorganic material such as SiOx, SiNx, SiC, SiON, SiONC, and amorphous carbon (aC). It may be formed of an organic material such as meth) acrylate, epoxy polymer, imide polymer and the like.
- the passivation layer 318 may include an encapsulation layer in which a layer formed of an inorganic material and a layer formed of an organic material are sequentially stacked one or more times.
- the adhesive layer 360 adheres the display unit 350a and the polarizing plate 370, and is formed of an adhesive composition including a (meth) acrylate-based resin, a curing agent, an initiator, and a silane coupling agent. Can be.
- the polarizer 370 may implement polarization of internal light or prevent reflection of external light to implement a display or increase a contrast ratio of the display.
- the polarizing plate may be composed of a polarizer alone.
- the polarizer may include a polarizer and a protective film formed on one or both sides of the polarizer.
- the polarizing plate may include a polarizer and a protective coating layer formed on one or both surfaces of the polarizer.
- the polarizer, the protective film, and the protective coating layer may use a conventional one known to those skilled in the art.
- the touch screen panel 380 detects a change in capacitance generated when a human body or a conductor such as a stylus touches to generate an electrical signal.
- the display unit 350a may be driven by the signal.
- the touch screen panel 380 is formed by patterning a flexible and conductive conductor, and may include a second sensor electrode formed between the first sensor electrode and the first sensor electrode to cross the first sensor electrode. have.
- the conductor for the touch screen panel 380 may include, but is not limited to, metal nanowires, conductive polymers, carbon nanotubes, and the like.
- the flexible window film 390 may be formed on the outermost side of the flexible display device 300 to protect the display device.
- an adhesive layer is further formed between the polarizing plate 370 and the touch screen panel 380 and / or between the touch screen panel 380 and the flexible window film 390 to form a polarizing plate, a touch screen panel, and a flexible display panel.
- the bond between the window films can be strengthened.
- the adhesive layer may be formed of an adhesive composition including a (meth) acrylate resin, a curing agent, an initiator, and a silane coupling agent.
- a polarizer may be further formed below the display unit 350a to implement polarization of the internal light.
- FIG. 5 is a cross-sectional view of a flexible display device according to another exemplary embodiment of the present invention.
- the flexible display device 400 includes a display 350a, a touch screen panel 380, a polarizer 370, and a flexible window film 390.
- the window film 390 may include a flexible window film according to embodiments of the present invention.
- Flexible display according to an embodiment of the present invention except that the touch screen panel 380 is not directly formed on the flexible window film 390, but the touch screen panel 380 is formed below the polarizer 370. It is substantially the same as the device. In this case, the touch screen panel 380 may be formed together with the display 350a.
- the touch screen panel 380 since the touch screen panel 380 is formed together with the display unit 350a on the display unit 350a, the display panel 350a may be thinner and brighter than the flexible display device according to the exemplary embodiment of the present invention, and thus may have good visibility.
- the touch screen panel 380 may be formed by deposition, but is not limited thereto.
- the pressure-sensitive adhesive layer is further formed therein to increase the mechanical strength of the display device.
- the adhesive layer may be formed of an adhesive composition including a (meth) acrylate resin, a curing agent, an initiator, and a silane coupling agent.
- a polarizing plate is further formed below the display unit 350a to induce polarization of internal light to improve a display image.
- the flexible display apparatus 500 includes a display unit 350b, an adhesive layer 360, and a flexible window film 390, and a flexible window film 390. May include a flexible window film according to embodiments of the present invention. It is substantially the same as the flexible display device according to the exemplary embodiment of the present invention except that the device may be driven only by the display unit 350b and the polarizer and the touch screen panel are excluded.
- the display unit 350b may include a substrate and an optical element including an LCD, an OLED, or an LED element formed on the substrate, and the display unit 350b may have a touch screen panel therein.
- the flexible window film of this embodiment can be used also for a non-flexible display apparatus.
- SAN-APRO 100 weight part of manufactured siloxane resin, 10 weight part of crosslinking agents CY-179 (Araldite), and 5 weight part of initiator CPI-100P (SAN-APRO) were added, and the composition for window films was prepared.
- the prepared window film composition was applied to a polyethylene terephthalate film (TA043, Toyobo Co., Ltd., thickness: 80 ⁇ m), dried at 100 ° C. for 5 minutes, irradiated with UV of 1000 mJ / cm 2 , and again at 80 ° C. for 4 hours. Heating to prepare a window film having a coating layer thickness of 50 ⁇ m.
- OXT-221 (3-ethyl-3 [[(3-ethyloxetan-3-yl) methoxy] methyl] oxetane (3-Ethyl-3 [[instead of 10 parts by weight of the crosslinking agent CY-179 in Example 1 Except for using 10 parts by weight of (3-ethyloxetane-3-yl) methoxy] methyl] oxetane, Toagosei) to prepare a window film in the same manner.
- a window film was prepared in the same manner except that 20 parts by weight of Bis [(3,4-epoxycyclohexyl) methyl] adipate (JIANGSU TETRA NEW MATERIAL TECHNOLOGY CO) was used. .
- a window film was prepared in the same manner except that 30 parts by weight of Bis [(3,4-epoxycyclohexyl) methyl] adipate (JIANGSU TETRA NEW MATERIAL TECHNOLOGY CO) was used. .
- siloxane resin was prepared in the same manner except that a monomer mixture containing 1 mol% was used. 100 parts by weight of the prepared siloxane resin, 20 parts by weight of Bis [(3,4-epoxycyclohexyl) methyl] adipate (JIANGSU TETRA NEW MATERIAL TECHNOLOGY CO), and 5 parts by weight of the initiator CPI-100P (SAN-APRO) were added. Was prepared. A window film was manufactured in the same manner as in Example 1 using the prepared composition for a window film.
- Tinuvin-400-derived triethoxysilane was prepared in the same manner as in Example 6.
- Example 1 a monomer mixture containing 98 mol% of 2- (3,4-epoxycyclohexyl) ethyltriethoxysilane, 1 mol% of Tinuvin-400-derived triethoxysilane, and 1 mol% of dimethyldimethoxysilane was used.
- a siloxane resin was prepared in the same manner except.
- Tinuvin-400-derived triethoxysilane was prepared in the same manner as in Example 6. 98 mol% of 2- (3,4-epoxycyclohexyl) ethyltriethoxysilane in Example 1, 1 mol% of triethoxysilane derived from Tinuvin-400, ethyl (methylethoxysilane) 2- (3,4-epoxycyclohexyl) A siloxane resin was prepared in the same manner except that a monomer mixture containing 1 mol% was used.
- the window film was manufactured in the same manner as in Example 1, except that the type and number of moles of silicone monomers and the type and content of the crosslinking agent were changed as shown in Table 2 below.
- composition of the composition for window films of an Example and a comparative example is shown in following Table 1 and Table 2.
- the following physical properties (1) to (4) of the window films prepared in Examples and Comparative Examples were measured and shown in Tables 1 and 2 below.
- the window film 1 having a thickness of the substrate layer of 80 mu m and a coating layer of 50 mu m was cut into a width x length (10 cm x 10 cm), and the base layer was a bottom surface (2).
- the maximum height (H) from the bottom (2) to the corner of the window film (1) is measured and averaged when placed on the bottom (2) and left at 25 ° C. and 50% relative humidity. It was.
- Pencil hardness About the coating layer in a window film, it measured by the JIS K5400 method using the pencil hardness tester (Heidon). For the pencil, Mitsubishi's 6B to 9H pencil was used, and the load of the pencil on the coating layer was 1 kg, the angle at which the pencil was drawn at 45 °, and the speed at which the pencil was drawn at 60 mm / min. Pencil Hardness It was measured using a pencil below. If there were no scratches in all five evaluations, the hardness was determined as the pencil hardness.
- the yellow index (Y1) was measured on a window film using a colorimeter (CM3600D, Konica Minolta) at a D65 light source 2 ° (angle of the window film and the light source). Thereafter, the window film was irradiated with light having a peak wavelength of 306 nm for 72 hours using an optical device (CT-UVT, Core Tech), and the yellow index (Y2) was evaluated in the same manner. Light reliability was determined using the difference (Y2-Y1, ⁇ Y.I.) of the yellow index before and after light irradiation.
- the flexible window film according to the embodiments of the present invention has a low curling with a curl of less than 1mm, high hardness with a pencil hardness of 7H or more, good flexibility with a radius of curvature of 5.0mm or less, It is also excellent in light resistance and can be used as a flexible window film.
- Comparative Examples 1 to 4 out of the crosslinking agent content of the present invention has a high curl or one or more of pencil hardness, radius of curvature, light resistance is not as good as the present invention.
- Comparative Examples 5 and 6 which do not contain a crosslinking agent the curling and radius of curvature were not as good as in the present invention.
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Abstract
Description
실시예 | ||||||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | ||
실리콘단량체(mol%) | 2-(3,4-에폭시시클로헥실)에틸트리에톡시실란 | 95 | 95 | 95 | 95 | 95 | 95 | 98 | 98 | 98 | 98 | - |
2-히드록시-4-(3-트리에톡시실릴프로폭시)디페닐케톤 | 5 | 5 | 5 | 5 | 5 | - | 1 | 1 | - | - | - | |
Tinuvin-400 유래 트리에톡시실란 | - | - | - | - | - | 5 | - | - | 1 | 1 | - | |
디메틸디메톡시실란 | - | - | - | - | - | - | 1 | - | 1 | - | - | |
2-(3,4-에폭시시클로헥실)에틸메틸디에톡시실란 | - | - | - | - | - | - | - | 1 | - | 1 | - | |
2-(3,4-에폭시시클로헥실)에틸트리메톡시실란 | - | - | - | - | - | - | - | - | - | - | 95 | |
(3-글리시독시프로필)트리메톡시실란 | - | - | - | - | - | - | - | - | - | - | 5 | |
가교제(중량부) | CY-179 | 10 | - | - | - | - | - | - | - | 10 | - | 10 |
Bis[(3,4-epoxycyclohexyl)methyl] adipate | - | 10 | - | 20 | 30 | 20 | 20 | 20 | 10 | 10 | - | |
OXT-221 | - | - | 10 | - | - | - | - | - | - | 10 | - | |
개시제(중량부) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | |
말림(mm) | 0.9 | 0.8 | 1.0 | 0.6 | 0.3 | 0.6 | 0.5 | 0.4 | 0.8 | 0.9 | 0.3 | |
연필 경도 | 7H | 9H | 7H | 8H | 7H | 7H | 8H | 8H | 7H | 7H | 8H | |
곡률 반경(mm) | 3.7 | 3.5 | 3.8 | 3.3 | 3.1 | 3.6 | 2.8 | 3.0 | 3.4 | 3.5 | 2.9 | |
내광 신뢰성(ΔY.I.) | 2.1 | 2.1 | 2.0 | 1.9 | 2.0 | 2.2 | 1.9 | 2.0 | 2.2 | 2.1 | 1.8 |
비교예 | |||||||
1 | 2 | 3 | 4 | 5 | 6 | ||
실리콘 단량체(mol%) | 2-(3,4-에폭시시클로헥실)에틸트리에톡시실란 | 95 | 95 | 98 | 98 | 95 | 95 |
2-히드록시-4-(3-트리에톡시실릴프로폭시)디페닐케톤 | 5 | 5 | 1 | 1 | 5 | - | |
Tinuvin-400 유래 트리에톡시실란 | - | - | - | - | - | 5 | |
디메틸디메톡시실란 | - | - | 1 | - | - | - | |
2-(3,4-에폭시시클로헥실)에틸메틸디에톡시실란 | - | - | - | 1 | - | - | |
가교제(중량부) | CY-179 | - | - | - | - | - | - |
Bis[(3,4-epoxycyclohexyl)methyl] adipate | 5 | 35 | 5 | 35 | - | - | |
OXT-221 | - | - | - | - | - | - | |
개시제(중량부) | 5 | 5 | 5 | 5 | 5 | 5 | |
말림(mm) | 23 | 0 | 17 | 0 | 37 | 34 | |
연필 경도 | 9H | 2H | 8H | H | 6H | 7H | |
곡률 반경(mm) | 5.6 | 3.6 | 5.7 | 3.5 | 6.4 | 6.0 | |
내광 신뢰성(ΔY.I.) | 2.4 | 2.1 | 2.3 | 2.2 | 1.8 | 1.6 |
Claims (11)
- 하기 화학식 1 또는 하기 화학식 2를 포함하는 실록산 수지 또는 이들의 혼합물, 가교제 및 개시제를 포함하고, 상기 가교제는 상기 실록산 수지 또는 이들의 혼합물 100중량부에 대해 약 10중량부 내지 약 30중량부로 포함되는 것인 윈도우 필름용 조성물:<화학식 1>(R1SiO3/2)x(R2SiO3/2)y(상기 화학식 1에서, R1은 가교성 작용기이고; R2는 자외선 흡수 작용기 또는 자외선 흡수 작용기 함유기이고; 0<x≤1, 0≤y<1, x+y=1),<화학식 2>(R1SiO3/2)x(R3R4SiO2/2)z(R2SiO3/2)y(상기 화학식 2에서, R1은 가교성 작용기이고;R2는 자외선 흡수 작용기 또는 자외선 흡수 작용기 함유기이고;R3 및 R4는 각각 독립적으로 수소, 가교성 작용기, 비치환 또는 치환된 C1 내지 C20의 알킬기, 또는 비치환 또는 치환된 C5 내지 C20의 시클로알킬기이고, R3 및 R4 중 하나 이상은 비치환 또는 치환된 C1 내지 C20의 알킬기이고; 0<x<1, 0<y<1, 0<z<1, x+y+z=1).
- 제1항에 있어서, 상기 실록산 수지는 하기 화학식 1-13의 실록산 수지를 포함하는 것인, 윈도우 필름용 조성물:<화학식 1-13>(EcSiO3/2)x1(GpSiO3/2)x2(상기 화학식 1-13에서, Ec는 (3,4-에폭시시클로헥실)에틸기, Gp는 3-글리시독시프로필기, 0<x1<1, 0<x2<1, x1+x2=1).
- 제1항에 있어서, 상기 가교제는 고리형 지방족 에폭시 모노머를 포함하는 것인, 윈도우 필름용 조성물.
- 제3항에 있어서, 상기 고리형 지방족 에폭시 모노머는 (3,4-에폭시시클로헥실)메틸-3',4'-에폭시시클로헥산카르복실레이트, 3,4-에폭시-6-메틸시클로헥실메틸-3',4'-에폭시-6'-메틸시클로헥산카르복실레이트, 비스(3,4-에폭시시클로헥실메틸)아디페이트, 비스((3,4-에폭시-6-메틸시클로헥실)메틸)아디페이트, 비스(3,4-에폭시시클로헥실메틸)말로네이트, 비스(3,4-에폭시시클로헥실메틸)숙시네이트, 비스(3,4-에폭시시클로헥실메틸)글루타레이트, 비스(3,4-에폭시시클로헥실메틸)피멜레이트, 비스(3,4-에폭시시클로헥실메틸)아젤레이트, 비스(3,4-에폭시시클로헥실메틸)세바케이트 중 하나 이상을 포함하는 것인, 윈도우 필름용 조성물.
- 기재층 및 상기 기재층 일면에 형성된 코팅층을 포함하는 플렉시블 윈도우 필름으로서, 상기 플렉시블 윈도우 필름은 말림이 약 1.0mm 이하이고,상기 코팅층은 제1항 내지 제4항 중 어느 한 항의 윈도우 필름용 조성물로 형성된 것인, 플렉시블 윈도우 필름.
- 제5항에 있어서, 상기 기재층 타면에 점착층이 더 형성된 것인, 플렉시블 윈도우 필름.
- 제5항의 플렉시블 윈도우 필름을 포함하는 플렉시블 디스플레이 장치.
- 제7항에 있어서, 상기 플렉시블 디스플레이 장치는 디스플레이부, 상기 디스플레이부 상에 형성된 점착층, 상기 점착층 상에 형성된 편광판, 상기 편광판 상에 형성된 터치스크린패널 및 상기 터치스크린패널 상에 형성된 상기 플렉시블 윈도우 필름을 포함하는 것인, 플렉시블 디스플레이 장치.
- 제7항에 있어서, 상기 플렉시블 디스플레이 장치는 디스플레이부, 상기 디스플레이부 상에 형성된 터치스크린패널, 상기 터치스크린패널 상에 형성된 편광판 및 상기 편광판 상에 형성된 상기 플렉시블 윈도우 필름을 포함하는 것인, 플렉시블 디스플레이 장치.
- 제7항에 있어서, 상기 플렉시블 디스플레이 장치는 디스플레이부, 상기 디스플레이부 상에 형성된 점착층 및 상기 점착층 상에 형성된 상기 플렉시블 윈도우 필름을 포함하는 것인, 플렉시블 디스플레이 장치.
- 제10항에 있어서, 상기 디스플레이부는 상부 또는 하부에 편광판을 더 포함하는 것인, 플렉시블 디스플레이 장치.
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JP2017532171A JP2018502192A (ja) | 2014-12-17 | 2015-12-16 | ウィンドウフィルム用組成物、これから形成されたフレキシブルウィンドウフィルムおよびこれを含むフレキシブルディスプレイ装置 |
US15/535,379 US10450482B2 (en) | 2014-12-17 | 2015-12-16 | Composition for window film, flexible window film formed therefrom, and flexible display device comprising same |
CN201580068893.6A CN107108935B (zh) | 2014-12-17 | 2015-12-16 | 窗膜用组成物、柔性窗膜以及柔性显示器装置 |
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KR20180010872A (ko) * | 2016-07-22 | 2018-01-31 | 삼성에스디아이 주식회사 | 윈도우 필름용 조성물 및 이로부터 형성된 플렉시블 윈도우 필름 |
US20210407342A1 (en) * | 2020-06-26 | 2021-12-30 | Samsung Display Co., Ltd. | Display device |
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- 2015-12-16 JP JP2017532171A patent/JP2018502192A/ja active Pending
- 2015-12-16 WO PCT/KR2015/013827 patent/WO2016099160A2/ko active Application Filing
- 2015-12-16 CN CN201580068893.6A patent/CN107108935B/zh active Active
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US20210407342A1 (en) * | 2020-06-26 | 2021-12-30 | Samsung Display Co., Ltd. | Display device |
Also Published As
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US20170349786A1 (en) | 2017-12-07 |
WO2016099160A3 (ko) | 2016-08-04 |
CN107108935B (zh) | 2020-08-04 |
KR101835866B1 (ko) | 2018-03-08 |
JP2018502192A (ja) | 2018-01-25 |
KR20160074750A (ko) | 2016-06-29 |
US10450482B2 (en) | 2019-10-22 |
CN107108935A (zh) | 2017-08-29 |
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