WO2011052934A2 - 투명막 형성용 잉크젯 조성물 및 이의 제조방법 - Google Patents
투명막 형성용 잉크젯 조성물 및 이의 제조방법 Download PDFInfo
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- WO2011052934A2 WO2011052934A2 PCT/KR2010/007298 KR2010007298W WO2011052934A2 WO 2011052934 A2 WO2011052934 A2 WO 2011052934A2 KR 2010007298 W KR2010007298 W KR 2010007298W WO 2011052934 A2 WO2011052934 A2 WO 2011052934A2
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- carbon atoms
- transparent film
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- inkjet composition
- forming
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/32—Epoxy compounds containing three or more epoxy groups
- C08G59/3209—Epoxy compounds containing three or more epoxy groups obtained by polymerisation of unsaturated mono-epoxy compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/062—Copolymers with monomers not covered by C09D133/06
- C09D133/068—Copolymers with monomers not covered by C09D133/06 containing glycidyl groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
Definitions
- the present invention relates to an inkjet composition for forming a transparent film and a method for manufacturing the same. More specifically, the transparent film is formed as an overcoat material in a process of manufacturing a liquid crystal display and can form a transparent ink thin film through an inkjet process. It relates to an inkjet composition for.
- the inkjet process is widely utilized in manufacturing color filters and various wirings, such as a liquid crystal display, an organic electroluminescent display, and a plasma display.
- the inkjet process is a method of printing a liquid raw material according to a predesigned pattern using an inkjet equipment, and then drying to form a desired thin film. Therefore, it is known to be a very innovative process in terms of economics or environmentally friendly to use a small amount of material compared to the existing process.
- Transparent coating liquids have been widely used as an overcoat material in the process of manufacturing a liquid crystal display.
- the overcoat process covers the lower layer of the display substrate to smooth out uneven height of the lower layer and protects the lower layer from heat or chemicals.
- the transparent coating liquid may be subjected to a post-treatment process after being used not only in the final process but also in a specific process, internal properties such that the characteristics of the transparent thin film are not changed during the post-treatment process are required.
- the overcoat transparent coating liquid is applied to the entire area of the lower layer by using a spin coater or a slit coater.
- the transparent coating liquid has been used as a white ink in an RGB white-plus system that adds a white layer in the existing RG B tricolor color filter system to improve the brightness of the device. Is getting wider
- an aspect of the present invention is an inkjet composition for forming a transparent film having excellent permeability and excellent chemical resistance, heat resistance, adhesion, jetting stability, and storage stability, in particular, it can be used as an overcoat material of an electronic device due to its excellent jetting property. It is to provide an inkjet composition for forming a transparent film that can also be used as a white (W) pattern.
- W white
- Another aspect of the present invention is to provide a method of manufacturing the inkjet composition as described above.
- Another aspect of the present invention is to provide a transparent film, characterized in that formed using the inkjet composition for forming a transparent film.
- Another aspect of the present invention is to provide a method for producing such a transparent film.
- Still another aspect of the present invention is to provide an electronic device including the transparent film as an overcoat.
- Another aspect of the invention relates to a color filter comprising the transparent film as a white pattern.
- an inkjet composition for forming a transparent film comprising (a) a binder polymer containing an epoxy group, (b) a melamine compound represented by the following formula (1), and (c) a solvent.
- At least two of R 1 , R 2, and R 3 are amine groups, and substituents which are not amine groups in R 1 to R 3 are hydrogen,
- the amine groups are each independently a linear or branched alkyl having 1 to 30 carbon atoms; Linear or branched alkoxy having 1 to 30 carbon atoms; Linear or branched allyl having 3 to 30 carbon atoms; Linear or branched alkenyl having 2 to 30 carbon atoms; Linear or branched vinyl of 2 to 30 carbon atoms; Carboxyl group (COO-); Ether group (-CH 2 OR), alcohol group (-CH 2 OH), substituted or unsubstituted cycloalkyl having 3 to 20 carbon atoms; Substituted or unsubstituted aryl having 6 to 40 carbon atoms; Substituted or unsubstituted aralkyl having 7 to 15 carbon atoms; And it may be substituted with a substituent selected from the group consisting of alkylaryl having 7 to 15 carbon atoms unsubstituted or substituted with hydrocarbon,
- substituent substituted by the said amine group is substituted by other substituents
- these substituents are a C1-C30 alkyl group; Aryl groups having 6 to 40 carbon atoms; Heterocyclic group having 3 to 40 carbon atoms; And halogen groups.
- the compound of Formula 1 is a compound of Formula 2 below.
- R 4 to R 9 are each independently, linear or branched alkyl having 1 to 30 carbon atoms; Linear or branched alkoxy having 1 to 30 carbon atoms; Linear or branched allyl having 3 to 30 carbon atoms; Linear or branched alkenyl having 2 to 30 carbon atoms; Linear or branched vinyl of 2 to 30 carbon atoms; Carboxyl group (COO-); Ether group (-CH 2 OR), alcohol group (-CH 2 OH), substituted or unsubstituted cycloalkyl having 3 to 20 carbon atoms; Substituted or unsubstituted aryl having 6 to 40 carbon atoms; Substituted or unsubstituted aralkyl having 7 to 15 carbon atoms; And it is selected from the group consisting of alkylaryl having 7 to 15 carbon atoms unsubstituted or substituted with hydrocarbon,
- R 4 to R 9 When R 4 to R 9 are substituted by other substituents, these substituents may be an alkyl group having 1 to 30 carbon atoms; Aryl groups having 6 to 40 carbon atoms; Heterocyclic group having 3 to 40 carbon atoms; And halogen groups.
- the inkjet composition has a three-dimensional network structure.
- the said inkjet composition for transparent film formation is used for the inkjet process.
- the binder polymer (a) containing an epoxy group includes a monomer having an epoxy group and an acrylic monomer having an epoxy group, an acrylic monomer having an ethylenic double bond in a side chain, a (meth) acrylic acid ester monomer, a styrene monomer and an ethylenically unsaturated bond. It is preferably a copolymer of at least one substance selected from the group consisting of silane monomers.
- the copolymer is preferably 5 to 50% by weight based on the total copolymer of the monomer having the epoxy group.
- the weight average molecular weights of the binder polymer containing the said (a) epoxy group are 1,000-100,000.
- boiling point of the said (c) solvent is 150-250 degreeC.
- the viscosity of the said inkjet composition for transparent film formation is 8-16 cP.
- the weight ratio of the said (a) binder polymer containing an epoxy group and (b) the melamine compound of General formula (1) is 1: 0.5-1: 2.
- the present invention provides a method for preparing an inkjet composition for forming a transparent film, comprising the step of mixing (a) a binder polymer containing an epoxy group, (b) the melamine compound of Formula 1 and (c) a solvent.
- the present invention provides a transparent film, characterized in that formed using the inkjet composition for forming a transparent film.
- the light transmittance at 380-780 nm of the said transparent film is 98% or more after hardening.
- the present invention provides a method for producing a transparent film comprising the step of forming a transparent film with the inkjet composition for forming a transparent film using an inkjet method.
- the present invention also provides an electronic device comprising the transparent film as an overcoat.
- the present invention also provides a color filter including the transparent film as a white pattern.
- the inkjet composition for forming a transparent film according to the present invention can increase the efficiency of the process by using a small amount of ink by using an inkjet process and can directly manufacture a transparent thin film at a desired place, and has excellent jetting property to form a transparent thin film. It is advantageous in that it can have excellent permeability, chemical resistance, heat resistance, adhesion, jetting stability and storage stability.
- the present invention provides an inkjet composition for forming a transparent film comprising (a) a binder polymer containing an epoxy group, (b) a melamine compound represented by the following formula (1), and (c) a solvent.
- At least two of R 1 , R 2, and R 3 are amine groups, and substituents which are not amine groups in R 1 to R 3 are hydrogen,
- the amine groups are each independently a linear or branched alkyl having 1 to 30 carbon atoms; Linear or branched alkoxy having 1 to 30 carbon atoms; Linear or branched allyl having 3 to 30 carbon atoms; Linear or branched alkenyl having 2 to 30 carbon atoms; Linear or branched vinyl of 2 to 30 carbon atoms; Carboxyl group (COO-); Ether group (-CH 2 OR), alcohol group (-CH 2 OH), substituted or unsubstituted cycloalkyl having 3 to 20 carbon atoms; Substituted or unsubstituted aryl having 6 to 40 carbon atoms; Substituted or unsubstituted aralkyl having 7 to 15 carbon atoms; And it may be substituted with a substituent selected from the group consisting of alkylaryl having 7 to 15 carbon atoms unsubstituted or substituted with hydrocarbon,
- substituent substituted by the said amine group is substituted by other substituents
- these substituents are a C1-C30 alkyl group; Aryl groups having 6 to 40 carbon atoms; Heterocyclic group having 3 to 40 carbon atoms; And halogen groups.
- Melamine compound of Formula 1 is a suitable viscosity for the inkjet composition for forming a transparent film by acting as a cross-linker by reacting the epoxy group of the binder polymer containing two or three amine groups (a) epoxy group formed in the terminal functional group Can be given.
- the melamine compound has a lower molecular weight and a lower relative viscosity than the dipentaerythritol hexaacrylate (DPHA), which is a monomer used in the inkjet composition for forming a transparent film
- DPHA dipentaerythritol hexaacrylate
- the dosage can be increased, the transparent film is formed. It is possible to increase the solid content of the inkjet composition for the ink can reduce the number of drops (drop) of the ink in the coating process, such as inkjet process.
- the inkjet composition for forming a transparent film including the melamine compound is subjected to a condensation type thermosetting process rather than a chain polymerization using a carbon-carbon double bond, thereby improving the overall mechanical and thermal durability of the transparent coating thin film.
- the compound of Formula 1 may be represented by the following formula (2).
- R 4 to R 9 are each independently, linear or branched alkyl having 1 to 30 carbon atoms; Linear or branched alkoxy having 1 to 30 carbon atoms; Linear or branched allyl having 3 to 30 carbon atoms; Linear or branched alkenyl having 2 to 30 carbon atoms; Linear or branched vinyl of 2 to 30 carbon atoms; Carboxyl group (COO-); Ether group (-CH 2 OR), alcohol group (-CH 2 OH), substituted or unsubstituted cycloalkyl having 3 to 20 carbon atoms; Substituted or unsubstituted aryl having 6 to 40 carbon atoms; Substituted or unsubstituted aralkyl having 7 to 15 carbon atoms; And it is selected from the group consisting of alkylaryl having 7 to 15 carbon atoms unsubstituted or substituted with hydrocarbon,
- R 4 to R 9 When R 4 to R 9 are substituted by other substituents, these substituents may be an alkyl group having 1 to 30 carbon atoms; Aryl groups having 6 to 40 carbon atoms; Heterocyclic group having 3 to 40 carbon atoms; And halogen groups.
- the alkyl group having 1 to 30 carbon atoms may be at least one selected from the group consisting of methyl group, ethyl group, propyl group, isopropyl group, butyl group, tertiary-butyl group, pentyl group, hexyl group and heptyl group. .
- the linear or branched alkoxy group having 1 to 30 carbon atoms may be at least one selected from the group consisting of OCH 3 , -OCH 2 CH 3 , -OCH 2 CH 2 CH 3 , and -OCH 2 CH 2 CH 2 CH 3 . .
- the aryl group having 6 to 40 carbon atoms may be at least one selected from the group consisting of a phenyl group, a naphthyl group, anthracenyl group, a biphenyl group, a pyrenyl group, and a perrylenyl group.
- the heterocyclic group having 3 to 40 carbon atoms may be at least one selected from the group consisting of pyridyl group, bipyridyl group, acridinyl group, thienyl group, imidazolyl group, oxazolyl group, thiazolyl group and quinolyl group.
- the halogen group may be at least one selected from the group consisting of fluorine, chlorine, bromine and iodine.
- the linear or branched vinyl group having 2 to 30 carbon atoms may include, for example, an acrylic group.
- the inkjet composition for forming a transparent film may include (a) 1 to 40% by weight of the binder polymer containing an epoxy group, (b) 1 to 40% by weight of a melamine compound of Formula 1, and (c) based on the total weight of the inkjet composition for forming a transparent film. ) 40 to 90% by weight of the solvent.
- the strength of the transparent film to be prepared may be lowered.
- the binder polymer is more than 40% by weight, the viscosity of the inkjet composition for forming a transparent film may be increased to significantly lower the jetting properties. If the content of the melamine compound is less than 1% by weight, the heat resistance and strength of the transparent membrane may be lowered due to insufficient crosslinking, and if the content of the melamine compound is greater than 40% by weight, the unreacted monomer may be denatured during the curing process or further heat treatment so that the permeability of the transparent membrane is reduced. Can be lowered.
- the inkjet composition has a three-dimensional network structure.
- the ink film is very hardened to improve properties such as chemical resistance and wear resistance of the ink film.
- the inkjet composition for forming a transparent film may be applied to general coating processes such as spin coating and slit coating, but is preferably used for an inkjet process having excellent economic efficiency, environmental friendliness, and efficiency.
- the binder polymer containing the epoxy group (a) is not particularly limited as long as it is a polymer capable of imparting a bonding force to the surface of the substrate on which the inkjet composition for forming a transparent film is applied without degrading the performance of the inkjet composition for forming a transparent film.
- Copolymers of one or more materials can be used.
- the copolymer contains 5 to 50% by weight of the monomer having an epoxy group based on the total copolymer.
- the content of the monomer having an epoxy is less than 5% by weight, crosslinking of the ink film may not occur properly, and thus the film strength may be lowered.
- the content of the monomer has an epoxy content of 50% by weight, the reactivity may be slightly increased, and thus the storage stability of the composition may be reduced.
- the monomer including the epoxy group included in the binder polymer containing the epoxy group (a) is combined with the amine group of the melamine compound, thereby providing an appropriate viscosity to the inkjet composition for forming a transparent film and improving the storage stability of the ink composition. do.
- the weight average molecular weights of the binder polymer containing the said (a) epoxy group are 1,000-100,000.
- the weight average molecular weight exceeds 100,000, there is a fear that the solubility in the solvent or the viscosity of the entire ink is too high, if less than 1,000, the physical properties of the transparent coating layer may finally occur.
- a low volatile solvent as a low volatile high boiling point solvent, for example, the high boiling point solvent of 150-250 degreeC can be used.
- the kind of the solvent is, for example, ethylene glycol monobutyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol butyl ether ), Diethylene glycol monoethyl ether acetate, dipropylene glycol methyl ether acetate, methoxy ethanol, ethoxy ethanol, butoxy ethanol, butoxy propanol, ethoxy ethyl acetate, butoxy acetate and butane
- One or more selected from the group consisting of oxy ethyl acetate can be used.
- additives include at least one selected from the group consisting of surfactants, adhesives to enhance adhesion to the substrate, adhesion promoters, curing accelerators, thermal polymerization inhibitors, dispersants, plasticizers, fillers, antifoaming agents, dispersion aids and anti-agglomerating agents. It may further include an additive.
- surfactants adhesives to enhance adhesion to the substrate
- adhesion promoters curing accelerators
- thermal polymerization inhibitors thermal polymerization inhibitors
- dispersants plasticizers
- fillers antifoaming agents, dispersion aids and anti-agglomerating agents.
- antifoaming agents dispersion aids and anti-agglomerating agents.
- additives include at least one selected from the group consisting of surfactants, adhesives to enhance adhesion to the substrate, adhesion promoters, curing accelerators, thermal polymerization inhibitors, dispersants, plasticizers, fillers, antifoaming agents, dispersion aids
- the additive is preferably added in an amount of 0.01 to 0.5% by weight, more preferably 0.1 to 0.5% by weight based on the total weight of the inkjet composition for forming a transparent film.
- the viscosity of the inkjet composition for forming a transparent film is preferably from 8 to 16 cP, more preferably from 11 to 13 cP so that it can be easily applied to an inkjet process with respect to jetting stability.
- jetting stability may decrease.
- the melanin compound of the present invention has a low molecular weight and a low viscosity, the permeation amount can be increased, and thus the solid content of the entire ink can be increased, so that the number of drops in the inkjet process can be reduced.
- the condensation thermal curing process is performed instead of a chain polymerization using a carbon-carbon double bond, the mechanical and thermal durability of the entire thin film is increased.
- the said (a) binder polymer and (b) melamine compound occupy most solid content.
- the pigment or the colorant is a relatively high viscosity material
- the color ink composition including the same has a disadvantage in that the solid content cannot be increased to a certain level or more due to the viscosity limitation for stable jetting.
- the inkjet composition of the present invention does not have a large burden on viscosity, so that a solid solid ink can be prepared, and the content of the binder polymer and the melamine compound can be freely increased compared to the conventional color ink composition, and the content ratio of the two materials It is also easy to adjust.
- the solid content of the (a) binder polymer and (b) the melamine compound is preferably included in an amount of 95 to 99% by weight based on the total solid content of the inkjet composition for forming a transparent film. If the content is less than 95%, the permeability may be lowered, or fumes may be generated during the curing or post-processing, and contamination may occur. If the content is more than 99% by weight, the ink film coating property and adhesion to the substrate deteriorate. Can be.
- the weight ratio of (a) the binder polymer and (b) the melamine compound is preferably 1: 2 or less, that is, it is preferable that the melamine compound is included in the weight ratio or less, more preferably. Is 1: 0.5 to 1: 1.
- the melamine compound increases in the ratio of the binder polymer and the melamine compound containing an epoxy group to 1: 2, the melamine compound is too high in the ink, and the melamine lost during curing of the coating film of the inkjet composition for forming a transparent film is fume. It will be lost.
- the weight of the binder polymer containing an epoxy group exceeds 1: 0.5 compared to the melamine compound of Formula 1, since the content of the binder polymer with a high viscosity in the ink is large, the viscosity of the overall ink increases when the solid content is maintained Ink jetting becomes unstable, and insufficient crosslinking can lower the heat resistance and strength of the transparent film.
- the inkjet composition for forming a transparent film according to the present invention can easily adjust the viscosity required for use in the inkjet method as compared to the inkjet composition to which the pigment is added, it is not limited to the purpose of viscosity adjustment according to the desired purpose.
- Various kinds of binders, polymerizable monomers or other additives can be used, and their contents can be more easily adjusted.
- the present invention also provides a method for producing an inkjet composition for forming a transparent film, comprising the step of mixing (a) a binder polymer containing an epoxy group, (b) a melamine compound represented by Formula 1 below, and (c) a solvent.
- R 1 , R 2 and R 3 are as defined above.
- the content of (a) a binder polymer containing an epoxy group, (b) a melamine compound represented by the following Chemical Formula 1, and (c) a solvent is the same as described above. Detailed description thereof will be omitted.
- the present invention also provides a transparent film formed by using the inkjet composition for forming a transparent film of the present invention, wherein the transparent film has a light transmittance of 380 to 780 nm of 98% or more after curing.
- the present invention provides a method for producing a transparent film comprising the step of forming a transparent film with the inkjet composition for forming a transparent film using an inkjet method.
- the present invention also provides an electronic device comprising the transparent film as an overcoat.
- the electronic device may be, for example, a color filter device of an LCD display, but is not limited thereto.
- the present invention provides a color filter including the transparent film as a white pattern.
- the color filter may be manufactured by forming a black matrix pattern on a substrate using a method known in the art and then curing the black filter to form a light blocking portion and a pixel portion partitioned by the black matrix on the substrate; Filling the inkjet composition for forming a transparent film of the present invention into the pixel portion partitioned by the black matrix using an inkjet method; And curing the filled transparent inkjet composition.
- substrate is not specifically limited, A glass substrate, a plastic substrate, another flexible substrate, etc. can be used, A transparent glass substrate with strong heat resistance is preferable.
- the inkjet method is a method of discharging droplet-shaped ink in a non-contact manner to a pixel portion partitioned by the black matrix using an ink nozzle.
- the filled inkjet composition for forming a transparent film is preferably pre-bake at 50 to 120 ° C. and then post-bake at 220 to 280 ° C. when a thermal initiator is used. If the temperature of the thermosetting is less than 220 °C, the evaporation and thermal curing of the solvent is insufficient to reduce the strength and chemical resistance of the film, and if the temperature exceeds 280 °C, problems with the adhesion and precision with the substrate due to the volume shrinkage of the excessive pixel portion May occur, and the formed film may be damaged by heat.
- the curing of the filled inkjet composition for forming a transparent film at an exposure amount of 40 to 300 mJ / cm 2 when using a photoinitiator. If the exposure amount is less than 40 mJ / cm 2, the photocuring may be insufficient to reduce the strength and chemical resistance of the film. If the exposure amount is more than 300 mJ / cm 2, the time required for the exposure process may be longer, and thus tack time may be a problem. It is preferable to further cure the ink film formed after the exposure process in an oven at 180 to 230 ° C.
- the inkjet composition for forming a transparent film has a molar ratio of benzyl acrylate, methacrylate, hydroxy ethyl methacrylate, and glycidyl methacrylate (GMA) monomer in a total of 30: 45: 20: 5.
- GMA glycidyl methacrylate
- 12.1 g of a copolymer, 11.3 g of hexamethoxymethyl melamine compound (cymel 303), and 76.6 g of diethylene glycol monobutyl ether acetate were mixed with a solvent for 3 hours to prepare an inkjet composition for forming a transparent film.
- the inkjet composition for forming a transparent film is a binder polymer in the form of tetrahydropyralyl methacrylate, styrene, methacryloxy propyl trimethoxy silane, and glycidyl methacrylate (GMA) monomer.
- GMA glycidyl methacrylate
- 12.5 g of a copolymer formed at a molar ratio of 30, 11.6 g of hexamethoxymethyl melamine compound (cymel 303), and 75.9 g of diethylene glycol monobutyl ether acetate were mixed with a solvent for 3 hours to prepare an inkjet composition for forming a transparent film. .
- the inkjet composition for forming a transparent film is a binder polymer of 10 g of a copolymer of benzyl acrylate and methacrylate and methacrylic acid in a molar ratio of 60:10:30, and dipentaerythritol hexaacrylate (DPHA) as a polymerizable monomer.
- DPHA dipentaerythritol hexaacrylate
- An inkjet composition for forming a transparent film was prepared in the same manner as in Example 2, except that the solvent was replaced with propylene glycol monomethyl ether acetate (boiling point: 146 ° C.).
- the inkjet composition for forming a transparent film is a binder polymer of 10:50:40 of tetrahydropyranyl methacrylate, styrene, methacryloxy propyl trimethoxy silane, and glycidyl methacrylate (GMA) monomer. 17.6 g of the copolymer formed at a molar ratio of: 30, 7.0 g of hexamethoxymethyl melamine compound (cymel 303), 75 g of diethylene glycol monobutyl ether acetate as a solvent, and 0.4 g of other additives (surfactant and adhesion enhancer) for 3 hours By mixing, an inkjet composition for forming a transparent film was prepared.
- the inkjet compositions for forming a transparent film prepared in Examples 1, 2, Comparative Example 1 and Comparative Example 2 were each spin-coated on a glass substrate, and then pre-bake at about 90 ° C. for 3 minutes. Then, this was again post-bake in an IR oven (260-270 ° C.) for about 2 minutes to form a film.
- the viscosity change was measured while storing the inkjet compositions for forming a transparent film prepared in Examples 1, 2, Comparative Example 1, and Comparative Example 2, respectively, at a temperature of 45 ° C. for 5 days.
- the storage stability is excellent when the viscosity change over 5 days is within 10%.
- the transmittance was measured using the inkjet compositions for forming a transparent film prepared in Examples 1, 2, Comparative Example 1 and Comparative Example 2.
- the transmittance of each ink composition the transmittance
- Heat permeability and residual film rate were measured using the inkjet compositions for forming a transparent film prepared in Examples 1, 2, Comparative Example 1 and Comparative Example 2.
- the film prepared by Experimental Example 1 was further heat treated at 250 ° C. for 40 minutes, and then evaluated transmittance at 380 to 780 nm using a UV absorber.
- the transmittance of the transparent film coating film after the additional heat treatment is 95% or more can be said to be excellent heat resistance.
- the residual film ratio can be said to be excellent if the thickness change rate of the film before and after heat processing is less than 15%.
- Chemical resistance was measured using the inkjet compositions for forming a transparent film prepared in Examples 1, 2, Comparative Example 1, and Comparative Example 2. Chemical resistance evaluation was performed by immersing the film prepared in Experimental Example 1 in N-methyl pyrrolidone (NMP) solution for 30 minutes at 40 °C to evaluate the degree of swelling (swelling) as a thickness increase rate. When the increase rate of the coating film is 10% or less, it can be said that the chemical resistance is excellent.
- NMP N-methyl pyrrolidone
- Table 1 shows the results of the storage stability, permeability, heat resistance, chemical resistance and jetting stability.
- the inkjet compositions for forming a transparent film of Example 1 and Example 2 according to the present invention do not increase the viscosity by more than 5% even after 5 days storage at a temperature of 45 °C each very It can be seen that it has excellent storage stability.
- the inkjet compositions for forming a transparent film of Example 1 and Example 2 according to the present invention showed excellent transmittance by showing a transmittance of 99% or more in almost all visible light region after postbaking.
- the inkjet compositions for forming a transparent film of Examples 1 and 2 according to the present invention are different from the inkjet compositions for forming a transparent film of Comparative Example 1, which are polymerized and crosslinked by a carbon-carbon unsaturated bond, at 40 ° C. at 250 ° C. Even after the additional heat treatment for a minute, the transmittance of 98% or more and the residual film rate of 85% or more (see Table 1) are shown, and thus excellent heat resistance can be seen.
- the inkjet compositions for forming a transparent film of Examples 1 and 2 according to the present invention are treated with NMP solvents. It shows excellent chemical resistance by increasing thickness within 10%.
- the inkjet composition for forming a transparent film according to Examples 1 and 2 according to the present invention has a low volatilization and a suitable viscosity in the inkjet process evaluation, so that the satellite and the nozzle face wet / drying It was found that no problem occurred, and all nozzles were discharged normally to show excellent jetting properties.
- the inkjet composition for forming a transparent film according to Comparative Example 2 uses a solvent having a low boiling point and thus has high volatility and low viscosity, satellite formation and drying of the nozzle surface are observed. It can be seen that the inkjet characteristics are not normal. In other words, when the viscosity of the ink is lowered (less than 8 cP), satellites are generated and ink ejection becomes unstable.
- the inkjet composition for forming a transparent film according to Comparative Example 3 since the weight ratio of the binder polymer and the polymerizable monomer is less than 1: 0.5, the content of the binder polymer having a high viscosity in the ink is increased so that the total ink viscosity exceeds 16 cP. As a result, the jetting property is lowered, and the surface uniformity of the transparent film is lowered, and the voltage value required for the normal ejection of the ink is increased, thereby impairing the inkjet equipment. Therefore, it can be seen that the inkjet characteristics are unstable.
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Abstract
Description
실시예 1 | 실시예 2 | 비교예1 | 비교예2 | 비교예3 | |
(a):(b) 비율 | 1:0.93 | 1:0.93 | 1:1.6 | 1:0.93 | 1:0.4 |
고형분(%) | 23.8 | 24.5 | 26 | 24.5 | 25 |
점도 | 12.5 | 11.5 | 12.5 | 5.5 | 18.5 |
저장 안정성 | 우수(점도변화<5%) | 우수(점도변화<5%) | 양호(점도변화<10%) | 우수(점도변화<5%) | 양호(점도변화<10%) |
경화 후 투과도 | >99% | >99% | >98% | >99% | >99% |
내열성-투과도 | >98% | >98% | >95% | >98% | >98% |
내열성-잔막율 | >85% | >95% | >80% | >95% | >95% |
내화학성 | <15% | <5% | >20% | <5% | <5% |
잉크젯 안정성 | 정상 | 정상 | 정상 | 비정상 | 불안 |
비고 | 고비점 용매, 열경화 | 고비점 용매, 열경화 | 고비점 용매, 라디칼 중합 및 가교 | 저비점 용매, 열경화 | 고비점 용매, 열경화, 고점도 잉크 |
Claims (17)
- (a) 에폭시기를 함유하는 바인더 폴리머, (b) 하기 화학식 1의 멜라민 화합물 및 (c)용매를 포함하는 투명막 형성용 잉크젯 조성물.R1, R2 및 R3 는 적어도 2개가 아민기(amine group)이고, R1 내지 R3 중 아민기가 아닌 치환기는 수소이며,상기 아민기는 각각 독립적으로, 탄소수 1 내지 30의 선형 또는 분지형 알킬; 탄소수 1 내지 30의 선형 또는 분지형 알콕시; 탄소수 3 내지 30의 선형 또는 분지형 알릴; 탄소수 2 내지 30의 선형 또는 분지형 알케닐; 탄소수 2 내지 30의 선형 또는 분지형 비닐; 카르복실기(COO-); 에테르기(-CH2OR), 알코올기(-CH2OH), 치환 또는 비치환된 탄소수 3 내지 20의 시클로알킬; 치환 또는 비치환된 탄소수 6 내지 40의 아릴; 치환 또는 비치환된 탄소수 7 내지 15의 아랄킬(aralkyl); 및 탄화수소로 치환 또는 비치환된 탄소수 7 내지 15의 알킬아릴(alkylaryl)로 이루어진 군에서 선택된 치환기로 치환될 수 있으며,상기 아민기에 치환된 치환기가 다른 치환기에 의해 치환되는 경우, 이들 치환기는 탄소수 1 내지 30의 알킬기; 탄소수 6 내지 40의 아릴기; 탄소수 3 내지 40의 헤테로 고리기; 및 할로겐기로 이루어진 군에서 선택된다.
- 청구항 1에 있어서, 상기 화학식 1의 화합물은 하기 화학식 2의 화합물인 것을 특징으로 하는 투명막 형성용 잉크젯 조성물.상기 식에서,R4, 내지 R9는 각각 독립적으로, 탄소수 1 내지 30의 선형 또는 분지형 알킬; 탄소수 1 내지 30의 선형 또는 분지형 알콕시; 탄소수 3 내지 30의 선형 또는 분지형 알릴; 탄소수 2 내지 30의 선형 또는 분지형 알케닐; 탄소수 2 내지 30의 선형 또는 분지형 비닐; 카르복실기(COO-); 에테르기(-CH2OR), 알코올기(-CH2OH), 치환 또는 비치환된 탄소수 3 내지 20의 시클로알킬; 치환 또는 비치환된 탄소수 6 내지 40의 아릴; 치환 또는 비치환된 탄소수 7 내지 15의 아랄킬(aralkyl); 및 탄화수소로 치환 또는 비치환된 탄소수 7 내지 15의 알킬아릴(alkylaryl)로 이루어진 군에서 선택되고,상기 R4 내지 R9가 다른 치환기에 의해 치환되는 경우, 이들 치환기는 탄소수 1 내지 30의 알킬기; 탄소수 6 내지 40의 아릴기; 탄소수 3 내지 40의 헤테로 고리기; 및 할로겐기로 이루어진 군에서 선택된다.
- 청구항 1에 있어서, 상기 투명막 형성용 잉크젯 조성물 총 중량에 대해 (a) 에폭시기를 함유하는 바인더 폴리머 1 내지 40 중량%, (b) 화학식 1의 멜라민 화합물 1 내지 40 중량% 및 (c) 용매 40 내지 90 중량%를 포함하는 것을 특징으로 하는 투명막 형성용 잉크젯 조성물.
- 청구항 1에 있어서, 상기 잉크젯 조성물은 3차원 그물 구조를 갖는 투명막 형성용 잉크젯 조성물.
- 청구항 1에 있어서, 상기 투명막 형성용 잉크젯 조성물은 잉크젯 공정용으로 사용되는 것을 특징으로 하는 투명막 형성용 잉크젯 조성물.
- 청구항 1에 있어서, 상기 (a) 에폭시기를 함유하는 바인더 폴리머는 에폭시기를 갖는 모노머와 에폭시기를 갖는 아크릴계 모노머, 측쇄에 에틸렌성 이중결합을 갖는 아크릴계 모노머, (메타)아크릴산 에스테르 모노머, 스티렌 모노머 및 에틸렌성 불포화 결합을 포함하는 실란 단량체로 이루어진 군으로부터 선택된 1종 이상의 물질의 공중합체인 것을 특징으로 하는 투명막 형성용 잉크젯 조성물.
- 청구항 6에 있어서, 상기 공중합체는 상기 에폭시기를 갖는 모노머의 함량이 전체 공중합체를 기준으로 5 내지 50 중량%인 것을 특징으로 하는 투명막 형성용 잉크젯 조성물.
- 청구항 1에 있어서, 상기 (a) 에폭시기를 함유하는 바인더 폴리머의 중량평균 분자량은 1,000 내지 100,000 인 것을 특징으로 하는 투명막 형성용 잉크젯 조성물.
- 청구항 1에 있어서, 상기 (c) 용매는 비점이 150 내지 250 ℃인 것을 특징으로 하는 투명막 형성용 잉크젯 조성물.
- 청구항 1에 있어서, 상기 투명막 형성용 잉크젯 조성물의 점도는 8 내지 16 cP 인 것을 특징으로 하는 투명막 형성용 잉크젯 조성물.
- 청구항 1에 있어서, 상기 (a) 에폭시기를 함유하는 바인더 폴리머와 (b) 화학식 1의 멜라민 화합물의 중량비는 1:0.5 내지 1:2 인 투명막 형성용 잉크젯 조성물.
- 청구항 1 내지 청구항 11 중 어느 한 항의 투명막 형성용 잉크젯 조성물을 이용하여 형성된 것을 특징으로 하는 투명막.
- 청구항 13에 있어서, 상기 투명막은 380 내지 780 nm에서의 광투과도가 경화 후 98 % 이상인 것을 특징으로 하는 투명막.
- 잉크젯 방법을 이용하여 청구항 1 내지 청구항 11 중 어느 한 항에 따른 투명막 형성용 잉크젯 조성물로 투명막을 형성하는 단계를 포함하는 투명막의 제조방법.
- 청구항 13에 따른 투명막을 오버코트로 포함하는 전자소자.
- 청구항 13에 따른 투명막을 화이트 패턴으로서 포함하는 컬러필터.
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CN201080048284.1A CN102597136B (zh) | 2009-10-26 | 2010-10-22 | 用于形成透明膜的喷墨组合物及其制备方法 |
US13/502,325 US9383489B2 (en) | 2009-10-26 | 2010-10-22 | Inkjet composition for forming transparent film and preparation method thereof |
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KR101384457B1 (ko) * | 2011-08-04 | 2014-04-14 | 주식회사 엘지화학 | 실란계 화합물 및 이를 포함하는 감광성 수지 조성물 |
KR101599108B1 (ko) * | 2013-09-26 | 2016-03-02 | 주식회사 엘지화학 | 경화성 조성물, 이로 제조된 경화막 및 이를 포함하는 디스플레이 장치 |
KR102021936B1 (ko) * | 2017-09-05 | 2019-09-17 | 한국생산기술연구원 | 유기 포토다이오드 박막 형성용 코팅액, 이의 제조방법 및 이에 의해 제조된 유기 포토다이오드 |
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US20120208930A1 (en) | 2012-08-16 |
WO2011052934A3 (ko) | 2011-10-06 |
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US9383489B2 (en) | 2016-07-05 |
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