WO2019066204A1 - 폴리이미드 전구체 용액 및 이를 이용하여 제조된 폴리이미드 필름 - Google Patents
폴리이미드 전구체 용액 및 이를 이용하여 제조된 폴리이미드 필름 Download PDFInfo
- Publication number
- WO2019066204A1 WO2019066204A1 PCT/KR2018/007271 KR2018007271W WO2019066204A1 WO 2019066204 A1 WO2019066204 A1 WO 2019066204A1 KR 2018007271 W KR2018007271 W KR 2018007271W WO 2019066204 A1 WO2019066204 A1 WO 2019066204A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- polyimide precursor
- integer
- polyimide
- precursor solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 0 CCC(C)[C@@](CC1)[C@](C)C*1C1C(C)(C)[C@]1C Chemical compound CCC(C)[C@@](CC1)[C@](C)C*1C1C(C)(C)[C@]1C 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N c1ccccc1 Chemical compound c1ccccc1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
Images
Classifications
-
- 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
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1039—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors comprising halogen-containing substituents
-
- 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
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1057—Polyimides containing other atoms than carbon, hydrogen, nitrogen or oxygen in the main chain
- C08G73/1064—Polyimides containing other atoms than carbon, hydrogen, nitrogen or oxygen in the main chain containing sulfur
-
- 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
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
- C08G73/1071—Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
Definitions
- the present invention relates to a polyimide precursor solution having a high solid content and a low viscosity, and a polyimide prepared using the same.
- Polyimide (PI) is a polymer having a relatively low crystallinity or mostly amorphous structure. It is easy to synthesize, can form a thin film, and does not need a crosslinking agent for curing.
- polyimide is a polymeric material that has transparency and rigid chain structure and has excellent heat resistance, chemical resistance, mechanical properties, electrical properties and dimensional stability. It is used in automotive, aerospace, flexible circuit boards, LCD Liquid crystal alignment films, bonding and coating agents, and the like.
- a flexible device is manufactured by applying a polyimide precursor solution onto a carrier substrate, curing the film to form a film, completing the device through a subsequent process, and then removing the completed device from the carrier substrate.
- the storage stability at room temperature of the polyimide precursor solution is particularly important. If the storage stability of the polyimide precursor solution is poor and the process viscosity is changed, the coating and curing process of the polyimide precursor solution becomes unstable.
- Polyimic acid which is a polyimide precursor, is known to have poor storage stability because the carboxylic acid that promotes hydrolysis is adjacent to an amide bond.
- a flexible device involving a high-temperature process is required to have high heat resistance.
- the process temperature may approach 500 ° C.
- even a polyimide having excellent heat resistance tends to undergo thermal decomposition.
- a film substrate for example, a bottom emission type organic EL or the like
- transparency of the film substrate is required.
- it is required to have a high light transmittance in a wavelength region of 400 nm or less, which is a visible light region.
- the retardation film or the polarizing plate for example, liquid crystal displays, touch panels, and the like are required to have high transparency.
- the imidized polyimide resin since the imidized polyimide resin has a low solubility, it is difficult to prepare the polyimide resin in a solution state, and its use for coating may be restricted. However, if the solubility is to be improved, the heat resistance can be reduced, and if the heat resistance is further improved, the light transmittance is lowered.
- a problem to be solved by the present invention is to provide a polyimide precursor solution having a high solid content and a low viscosity.
- Another object of the present invention is to provide a polyimide film produced using the polyimide precursor solution.
- Another object of the present invention is to provide a flexible display device comprising the polyimide film.
- the viscosity when the solids content of the polyimide precursor solution containing the organic solvent is 10 to 25% by weight, the viscosity may be 7000 cP or less.
- the organic solvent may comprise dimethylpropionamide (DMPA) or diethylpropionamide (DEPA).
- DMPA dimethylpropionamide
- DEPA diethylpropionamide
- the polyimide precursor contained in the polyimide precursor solution may be a polyamic acid having a repeating structure of formula (1).
- X is a tetravalent organic group selected from the group consisting of aromatic, alicyclic, and aliphatic tetravalent organic groups derived from a tetracarboxylic dianhydride,
- Y comprises a divalent organic group selected from the group consisting of aromatic, alicyclic and aliphatic divalent organic groups derived from diamines.
- X is one divalent organic group selected from the group consisting of the following formulas (2a) to (2g).
- R 31 to R 42 each independently represent an alkyl group having 1 to 10 carbon atoms (for example, methyl, ethyl, propyl, isopropyl, t-butyl, pentyl or hexyl)
- a fluoroalkyl group for example, a fluoromethyl group, a perfluoroethyl group, a trifluoromethyl group, etc.
- a 1 is from 0 to 2 integer
- b 1 is in the range of 0 to 4 integer
- c 1 is from 0 to 8 constant
- d 1 and e 1 are each independently from 0 to 3 an integer
- f 1 and g 1 respectively Independently, an integer of 0 to 4
- h 1 and j 1 each independently represent an integer of 0 to 3
- i 1 represents an integer of 0 to 4
- k 1 and l 1 each independently represent an integer of 0 to 4
- a 1, A 2, A 3 represents a single bond
- Y is a divalent organic group selected from the group consisting of the following formulas (4a) to (4d).
- L 1 represents a single bond, -O-, -CO-, -S-, -SO 2 -, -C (CH 3 ) 2 -, -C (CF 3 ) 2 -, -CONH-, -COO-, - (CH 2) n 1 -, -O (CH 2) n 2 O-, -OCH 2 -C (CH 3) 2 -CH 2 O- , or -COO (CH 2) n 3 OCO- , N 1 , n 2 and n 3 are each an integer of 1 to 10,
- L 2 and L 3 may be the same or different and each represents a single bond, -O-, -CO-, -S-, -SO 2 -, -C (CH 3 ) 2 -, -C (CF 3 ) 2 -, -CONH-, -COO-, - (CH 2 ) n 1 -, -O (CH 2 ) n 2 O-, -OCH 2 -C (CH 3 ) 2 -CH 2 O- Or -COO (CH 2 ) n 3 OCO-, n 1 , n 2 and n 3 are each an integer of 1 to 10,
- L 4, L 5 and L 6 may be the same or different from each other, and respectively a single bond, -O-, -CO-, -S-, -SO 2 -, -C (CH 3) 2 - , -C (CF 3) 2 - , -CONH-, -COO-, - (CH 2) n 1 -, -O (CH 2) n 2 O-, -OCH 2 -C (CH 3) 2 -CH 2 O- or -COO (CH 2 ) n 3 OCO-, n 1 , n 2 and n 3 are each an integer of 1 to 10,
- the at least one hydrogen atom contained in the aromatic rings of the general formulas (4a) to (4d) is an alkyl group having 1 to 10 carbon atoms (e.g., a methyl group, an ethyl group, a propyl group, an isopropyl group, a t-butyl group, a pentyl group, Or a fluoroalkyl group having 1 to 10 carbon atoms (for example, a fluoromethyl group, a perfluoroethyl group, a trifluoromethyl group, etc.).
- an alkyl group having 1 to 10 carbon atoms e.g., a methyl group, an ethyl group, a propyl group, an isopropyl group, a t-butyl group, a pentyl group, Or a fluoroalkyl group having 1 to 10 carbon atoms (for example, a fluoromethyl group, a perfluoroethyl group
- the polyimide precursor may further comprise a structure of the following formula (6) in the molecular structure.
- the transmittance of the polyimide film may be 75% or more in the range of 380 to 780 nm wavelength.
- the haze of the polyimide film may be 1 or less.
- the pyrolysis temperature of the polyimide film may be 400 ° C or higher.
- the polyimide film may have an elongation of 10% or more, a tensile strength of 30 MPa or more, and a tensile modulus of 1 GPa or more.
- the polyimide film may have a CTE of -20 to 90 ppm / ° C.
- the present invention also provides a flexible display device comprising the polyimide film.
- the present invention relates to a polyimide precursor having a distribution coefficient (Log P) of positive and a density of 1 g / cm < 3 > Or less, the interaction between polyamic acid, which is a polyimide precursor, and an organic solvent can be relaxed to lower the viscosity of the polyimide precursor solution, and thus a polyimide precursor solution having a high solid content and a low viscosity can be obtained.
- the difference in polarity is reduced due to the amphiphilic characteristic of the amide type solvent in which LogP is positive, so that the phase separation phenomenon between the polyamic acid and the organic solvent can be suppressed.
- FIGS. 1 and 2 show the results of SEM observation of the cross-section of the films of Comparative Example 1 and Example 1 by FIB (focused ion beam) treatment.
- " substituted " means that at least one hydrogen atom contained in the compound or organic group is substituted with a halogen atom, an alkyl group having 1 to 10 carbon atoms, a halogenated alkyl group, a cycloalkyl group having 3 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, Substituted with a substituent selected from the group consisting of an alkoxy group having 1 to 10 carbon atoms, a carboxylic acid group, an aldehyde group, an epoxy group, a cyano group, a nitro group, an amino group, a sulfonic acid group and derivatives thereof.
- the polyimide film is one of the materials attracting attention as a flexible display substrate, and the manufacturing process of the polyimide film substrate is as follows. First, a polyamic acid solution as a polyimide precursor solution is coated on a carrier substrate and thermally cured to form a polyimide film on the carrier substrate. Thereafter, a process necessary for device manufacture is performed on the polyimide film, and then the polyimide film is peeled from the carrier substrate to obtain a flexible display. The most important part of this process is the process of forming a polyimide film on a carrier substrate. When the polyamic acid solution is coated on the carrier substrate, it should be coated with low surface roughness without bubbles.
- the polyamic acid has a high polarity, and the polarity of a commonly used solvent (for example, N-methylpyrrolidone) is relatively high, and the polyamic acid solution has a higher viscosity than the solid component due to the interaction between the solvent and the polyamic acid. This makes it very difficult to control the bubbles generated during coating.
- the water absorption rate is high, when the coating is left standing after the coating, moisture is absorbed to cause solution whitening, and when the coating layer in which whitish tack is formed is thermally cured, high surface roughness is obtained, resulting in defects in the display process. Therefore, in order to lower the viscosity of the solution to improve the processability, the solids content can not but be lowered. However, when the solid content is lowered, the specific gravity of the solvent is relatively increased, so that a large amount of solvent evaporates during thermal curing, resulting in a coating failure.
- the present invention provides a polyimide precursor solution comprising a polyimide precursor and an amide-based organic solvent having a positive logarithm (Log P) and a density of 1 g / cm 3 or less.
- the LogP can be calculated using the ACD / LogP module of the ACD / Percepta platform of ACD / Labs.
- the ACD / LogP module can be calculated using the 2D structure of the molecules using the Quantitative Structure-Property Relationship (QSPR) Based algorithm.
- QSPR Quantitative Structure-Property Relationship
- the density of the organic solvent can be measured can be less than 1g / cm 3, a density of 1 g / cm 3 or more when having a value, the higher the relative viscosity can reduce the process efficiency with a standard measuring method of ASTM D1475.
- the present invention can reduce the polarity difference between the polyamic acid and the organic solvent due to the amphiphilic property of the amide-based solvent having the positive logarithm (Log P), and can suppress the phase separation phenomenon between the polyamic acid and the organic solvent have.
- the present invention is characterized in that an amide organic solvent having a positive LogP value and a density of 1 g / cm 3 or less is used as a polymerization solvent for preparing a polyimide precursor and further contained in a polyimide precursor solution,
- the viscosity can be lowered.
- the viscosity of the polyimide precursor solution according to the present invention may be 7,000 cP or less, preferably 6,000 cP or less, and more preferably 5,000 cP or less at the solid content level.
- the present invention can produce a polyimide precursor solution having a low viscosity even under the condition of high solid content by using an amide-based solvent having a positive Log P value and a density of 1 g / cm 3 or less. As a result, The coating defects due to the formation of bubbles can be reduced.
- amide-based organic solvent may be a variety of solvents, especially dimethyl-propionamide (DMPA) or diethyl propionamide (DEPA) is preferred.
- DMPA dimethyl-propionamide
- DEPA diethyl propionamide
- the distribution coefficient value is a positive number, it means that the polarity of the solvent is hydrophobic.
- the polyimide precursor solution is prepared using a specific solvent having a positive distribution coefficient, The formation of a salt by an acid and water or a polar organic solvent can be suppressed, and as a result, the haze can be improved. Therefore, the polyimide-based film according to the present invention can have high heat resistance and mechanical properties together with excellent transparency.
- the polyimide precursor solution containing a polar solvent having a negative logarithm of Log P may have a scattered coating around the region where the foreign matter exists due to the polarity of the foreign matter when the polarized micro- Cracks or thickness variations may occur.
- a hydrophobic solvent having an affinity for Log P when used, coating cracking, thickness change and the like can be reduced or suppressed even when a foreign substance having polarity is introduced.
- the polyimide precursor may be prepared by polymerizing a tetracarboxylic dianhydride and a diamine, and may include a polyamic acid having a repeating structure of the formula (1).
- X is a tetravalent organic group selected from the group consisting of aromatic, alicyclic, and aliphatic tetravalent organic groups derived from a tetracarboxylic dianhydride,
- Y comprises a divalent organic group selected from the group consisting of aromatic, alicyclic and aliphatic divalent organic groups derived from diamines.
- the X may be one quaternary organic group selected from the group consisting of the following formulas (2a) to (2g).
- R 31 to R 42 each independently represent an alkyl group having 1 to 10 carbon atoms (for example, methyl, ethyl, propyl, isopropyl, t-butyl, pentyl or hexyl)
- a fluoroalkyl group for example, a fluoromethyl group, a perfluoroethyl group, a trifluoromethyl group, etc.
- a 1 is from 0 to 2 integer
- b 1 is in the range of 0 to 4 integer
- c 1 is from 0 to 8 constant
- d 1 and e 1 are each independently from 0 to 3 an integer
- f 1 and g 1 respectively Independently, an integer of 0 to 4
- h 1 and j 1 each independently represent an integer of 0 to 3
- i 1 represents an integer of 0 to 4
- k 1 and l 1 each independently represent an integer of 0 to 4
- a 1, A 2, A 3 represents a single bond
- X may be selected from the group consisting of the tetravalent organic groups represented by the following formulas (3a) to (3s).
- the aromatic tetravalent organic group represented by any one of the above formulas (3a) to (3s) is a compound wherein at least one hydrogen atom present in the tetravalent organic group is an alkyl group having 1 to 10 carbon atoms (e.g., a methyl group, an ethyl group, a propyl group, an isopropyl group, , A pentyl group and a hexyl group) or a fluoroalkyl group having 1 to 10 carbon atoms (for example, a fluoromethyl group, a perfluoroethyl group, a trifluoromethyl group, etc.), a hydroxyl group, a sulfonic acid group and a carboxylic acid group Lt; / RTI > group.
- an alkyl group having 1 to 10 carbon atoms e.g., a methyl group, an ethyl group, a propyl group, an isopropyl
- Y 2 is to have one or two selected from the group consisting of Formula 4a to 4d can be an organic group.
- L 1 represents a single bond, -O-, -CO-, -S-, -SO 2 -, -C (CH 3 ) 2 -, -C (CF 3 ) 2 -, -CONH-, -COO-, - (CH 2) n 1 -, -O (CH 2) n 2 O-, -OCH 2 -C (CH 3) 2 -CH 2 O- , or -COO (CH 2) n 3 OCO- And n 1 , n 2 and n 3 are integers of 1 to 10, respectively.
- L 2 and L 3 may be the same or different and each represents a single bond, -O-, -CO-, -S-, -SO 2 -, -C (CH 3 ) 2 -, -C (CF 3 ) 2 -, -CONH-, -COO-, - (CH 2 ) n 1 -, -O (CH 2 ) n 2 O-, -OCH 2 -C (CH 3 ) 2 -CH 2 O- Or -COO (CH 2 ) n 3 OCO-, and n 1 , n 2 and n 3 are integers of 1 to 10, respectively.
- L 4, L 5 and L 6 may be the same or different from each other, and respectively a single bond, -O-, -CO-, -S-, -SO 2 -, -C (CH 3) 2 - , -C (CF 3) 2 - , -CONH-, -COO-, - (CH 2) n 1 -, -O (CH 2) n 2 O-, -OCH 2 -C (CH 3) 2 -CH 2 O- or -COO (CH 2 ) n 3 OCO-, and n 1 , n 2 and n 3 are integers of 1 to 10, respectively.
- Y may be selected from the group consisting of divalent organic groups represented by the following formulas (5a) to (5p).
- At least one hydrogen atom in the divalent group of the general formulas (5a) to (5p) is an alkyl group having 1 to 10 carbon atoms (e.g., a methyl group, an ethyl group, a propyl group, an isopropyl group, a t-butyl group, a pentyl group, (For example, a phenyl group, a naphthalenyl group and the like) having 6 to 12 carbon atoms, a fluoroalkyl group having 1 to 10 carbon atoms such as a fluoromethyl group, a perfluoroethyl group and a trifluoromethyl group, A sulfonic acid group, and a carboxylic acid group.
- alkyl group having 1 to 10 carbon atoms e.g., a methyl group, an ethyl group, a propyl group, an isopropyl group, a t-butyl group, a pent
- polyimide precursor may further include the following structure within the structure,
- the siloxane structure of Formula 6 may be formed by further including a diamine of Formula 7 as a polymerization component.
- the diamine compound having the structure of Formula 7 has a molecular weight of 4000 g / mol or more, 4200 g / mol or 4400 g / mol, or 6000 g / mol or less, or 5,500 g / .
- the molecular weight means the weight average molecular weight, and the molecular weight can be calculated by calculating the amine equivalent using NMR analysis or acid-base titration.
- the reaction of the tetracarboxylic dianhydride and the diamine can be carried out by a usual polyimide precursor polymerization method such as solution polymerization. Specifically, after the diamine is dissolved in an organic solvent, the tetracarboxylic acid may be subjected to a polymerization reaction by adding an anhydride. The reaction can be carried out under an inert gas or a nitrogen stream and can be carried out under anhydrous conditions.
- the polymerization reaction may be carried out at a temperature of -20 ⁇ to 60 ⁇ , preferably 0 to 45 ⁇ . If the reaction temperature is too high, the reactivity may become high and the molecular weight may become large, and the viscosity of the precursor composition may increase, which may be unfavorable in the process.
- the molecular weight of the polymerized polyamic acid may be 50,000 to 200,000 g / mol, or 60,000 to 150,000 g / mol.
- the polyimide precursor obtained as a result of the polymerization reaction is imidized to prepare a transparent polyimide film.
- the imidization process may be a chemical imidization or thermal imidization process.
- the polyimide precursor solution is coated on a substrate and then heat-treated to imidize the polyamic acid.
- the polyimide precursor solution may be in the form of a solution in which the polyimide precursor is dissolved in an organic solvent.
- the solution may be the reaction solution to be obtained, or the reaction solution may be diluted with another solvent.
- the polyimide precursor is obtained as a solid powder, it may be a solution prepared by dissolving the polyimide precursor in an organic solvent.
- a method for producing a film with a polyimide precursor solution according to the present invention comprises:
- the substrate may be glass, metal substrate, plastic substrate, or the like without any particular limitation.
- the polyimide precursor is excellent in thermal and chemical stability during the imidation and curing process, A glass substrate that can be easily separated without damage to the subsequently formed polyimide-based film may be desirable.
- the coating method include a spin coating method, a bar coating method, a roll coating method, an air-knife method, a gravure method, a reverse roll method, a kiss roll method, a doctor blade method, A spray method, a dipping method, a brushing method, or the like may be used. Of these, it is more preferable to carry out the continuous process and to perform the casting method which can increase the imidization rate of the polyimide.
- the polyimide precursor solution may also be applied over the substrate to a thickness range such that the final polyimide film has a thickness suitable for the display substrate.
- the thickness is 10 to 30 mu m.
- a drying process to remove the solvent present in the polyimide precursor solution prior to the curing process may optionally be further performed.
- the drying process may be carried out according to a conventional method, specifically at a temperature of 140 ° C or lower, or 80 ° C to 140 ° C. If the drying temperature is lower than 80 ⁇ , the drying process becomes longer. If the drying temperature is higher than 140 ⁇ , the imidization rapidly proceeds to make it difficult to form a polyimide film having a uniform thickness.
- the polyimide precursor solution is applied to a substrate and heat-treated on an IR oven, a hot air oven or a hot plate.
- the heat treatment temperature may be in the range of 300 to 500 ° C, preferably 320 to 480 ° C, Or may be performed in a multi-step heating process.
- the heat treatment process may be conducted for 20 to 70 minutes, preferably 20 to 60 minutes.
- the organic solvent contained in the polyimide precursor solution of the present invention may be used is the same as the organic solvent used in the synthesis reaction, the organic solvent is the LogP is positive, and a density of 1g / cm 3 or less amide-based organic
- a solvent such as dimethyl propionamide (DMPA) or diethyl propionamide (DEPA).
- the polyimide-based film may have a haze of 1 or less, preferably 0.9 or less, or 0.7 or less, more preferably 0.5 or less, and the transparency is improved. At this time, the thickness of the polyimide film may be 8 to 15 ⁇ , preferably 10 to 12 ⁇ .
- the transmittance for light having a wavelength of 380 to 760 nm in a film thickness range of 5 to 30 ⁇ ⁇ may be 70% or more.
- the polyimide film according to the present invention can be manufactured by heating and cooling at a temperature ranging from 100 ° C to 450 ° C in a range of n +
- the thermal expansion coefficient after one run may have a value of -20 to 90 ppm / ⁇ ⁇ , and the thermal decomposition temperature Td_1% at which the weight is reduced by 1% may be 400 ⁇ ⁇ or more or 500 ⁇ ⁇ or more.
- the polyimide-based film has a tensile modulus of at least about 1 GPa or at least 3 GPa, a tensile strength of at least about 30 MPa, at least about 100 MPa, or at least about 150 MPa, and a maximum elongation elongation of about 15%, or about 10% or more.
- the polyimide-based film can be applied to display substrates and devices.
- the device may be any solar cell having a flexible substrate (e.g., a flexible solar cell), organic light emitting diode (OLED) lighting (e.g., flexible OLED lighting) Device, or an organic electroluminescent device having a flexible substrate, an electrophoretic device, or an LCD device.
- OLED organic light emitting diode
- LCD liquid crystal display
- the viscosity of the polyimide precursor solution was measured at 25 ⁇ with a Brookfield rotational viscometer.
- the weight average molecular weight of the polyamic acid was measured using Gel Permeation Chromatography (GPC) and eluent (THF: DMF 50:50 by volume)
- a polyimide precursor solution was prepared in the same manner as in Example 1 except that the tetracarboxylic acid dianhydride and diamine shown in Table 2 were used.
- the viscosity of the polyimide precursor solution and the molecular weight of the polyamic acid were measured in Table 2 Respectively.
- TAHQ hydroquinone bis (trimellitate anhydride)
- a polyimide precursor solution was prepared in the same manner as in Example 11, except that the tetracarboxylic acid dianhydride and diamine shown in Table 3 were used.
- the viscosity of the polyimide precursor solution and the molecular weight of the polyamic acid were measured in the same manner as in Example 11, Respectively.
- a polyimide precursor solution was prepared in the same manner as in Comparative Example 1, except that the tetracarboxylic acid dianhydride and diamine shown in Table 4 were used.
- the viscosity of the polyimide precursor solution and the molecular weight of the polyamic acid were measured in Table 4 Respectively.
- a polyimide precursor solution was prepared in the same manner as in Comparative Example 11, except that the tetracarboxylic acid dianhydride and diamine shown in Table 5 were used.
- the viscosity of the polyimide precursor solution and the molecular weight of the polyamic acid were measured in Table 5 Respectively.
- the polyimide precursor solution containing the organic solvent according to the present invention has a low viscosity even under the condition of high solid content.
- the polyimide precursor solution of the comparative example is a polar solvent having a negative distribution coefficient, and the viscosity thereof is formed to be higher than the viscosity of the embodiment at the same solid concentration. This is because the defoaming effect of the bubbles in the solution during the production of the polyimide film is Which means that pores can be generated due to defective defoaming in the film after coating.
- Figs. 1 and 2 show the results of SEM observation of the film cross sections of Comparative Example 1 and Example 1 treated with FIB. It can be seen that micro-sized pores exist in the cross-section of the film of Comparative Example 1 in which the defoaming effect is lowered due to the relatively high viscosity of the polyimide precursor solution, while pores are not present in the cross-section of the film of Example 1.
- the polyimide precursor solutions prepared in Examples 1, 2, 5, 9 and 10 were spin-coated onto glass substrates.
- the glass substrate coated with the polyimide precursor solution was placed in an oven and heated at a rate of 2 DEG C / min.
- the glass substrate was cured at 80 DEG C for 15 minutes, at 150 DEG C for 30 minutes, at 220 DEG C for 30 minutes, and at 380 DEG C for 1 hour The process was carried out. After completion of the curing process, the glass substrate was immersed in water to remove the film formed on the glass substrate, and then dried in an oven at 100 DEG C to prepare a polyimide film.
- the CTE, thermal decomposition temperature, elongation, tensile strength, tensile modulus and transmittance of the prepared film were measured by the following methods, and the results are shown in Table 6.
- the film was pulled up at a rate of 5 ° C / min in a temperature range of 100 ° C to 400 ° C, and then cooled at a rate of 4 ° C / min in a temperature range of 400 ° C to 100 ° C.
- the rate of thermal expansion change when cooling at the speed was measured by TMA (Q400, TA company).
- the pyrolysis temperature was measured by the method of ISO 11359.
- Zwick's UTM was used to measure the mechanical properties (tensile modulus, tensile strength, elongation) of the film.
- the film was cut to a width of 5 mm or more and a length of 60 mm or more, and the distance between the grips was set to 40 mm, and the sample was pulled at a speed of 20 mm / min.
- the transmittance was measured by a transmittance meter (model name HR-100, manufactured by Murakami Color Research Laboratory) according to JIS K 7105.
- Example 1 Example 2
- Example 5 Example 9
- Example 10 PMDA_TFMB BPAF_TFMB 6FDA_TFMB BPDA_PDA
- BPDA_TFMB Solid concentration wt.% 12 12 12 12 12 12
- Viscosity cP 5010 3200 5100 6800 6700 Molecular Weight Mw 101,000 70,500 78,000 100,000 107,000 thickness ⁇ m 10
- 10 10 10 CTE 100 ⁇ 450 o C1 st cooling
- ppm / ° C -17 75 @ ⁇ 350 ° C 70 ⁇ 300 ° C 3.3 20 @ ⁇ 300 ° C Td_1% °C 535 530 501 565 546 Elongation % 23 15 20 15.4 20
- Tensile modulus Gpa 7.5 3.2 3.5 9.3
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
Abstract
Description
| DMPA | DEPA | DMAc | NMP | |
| 비점(bp) (oC) | 175 | 194 | 166 | 202 |
| 인화점(oC) | 65.8±9.65 | 73.6±9.65 | 63.8±9.6 | 86.1±0.0 |
| Pka | -0.41±0.70 | -0.41±0.70 | -0.41±0.70 | -0.41±0.20 |
| 밀도(g/cm3) | 0.876±0.06 | 0.870±0.06 | 0.880±0.06 | 1.029±0.06 |
| Log P | 0.256±0.249 | 1.275±0.249 | -0.253±0.249 | -0.637±0.349 |
| 증기압(Torr) | 1.12 | 0.444 | 1.81 | 0.299 |
| 실시예No. | 이무수물 | 디아민 | 용매 | 고형분 농도 (wt%) | 점도(cP) | Mw |
| 1 | PMDA | TFMB | DMPA | 12 | 5010 | 101,000 |
| 2 | BPAF | TFMB | DMPA | 12 | 3200 | 70,500 |
| 3 | ODPA | TFMB | DMPA | 12 | 4600 | 97,100 |
| 4 | TBIS-BAN | TFMB | DMPA | 12 | 3900 | 93,000 |
| 5 | 6FDA | TFMB | DMPA | 12 | 5100 | 78,000 |
| 6 | PMDA-HS | TFMB | DMPA | 12 | 4500 | 79,000 |
| 7 | TAHQ | TFMB | DMPA | 12 | 4800 | 101,000 |
| 8 | DSDA | TFMB | DMPA | 12 | 3600 | 89,000 |
| 9 | BPDA | PDA | DMPA | 12 | 6800 | 100,000 |
| 10 | BPDA | TFMB | DMPA | 12 | 6700 | 107000 |
| 실시예No | 이무수물 | 디아민 | 용매 | 고형분 농도(wt%) | 점도(cP) | Mw |
| 11 | PMDA | TFMB | DEPA | 12 | 4300 | 99,000 |
| 12 | BPAF | TFMB | DEPA | 12 | 2900 | 72,000 |
| 13 | ODPA | TFMB | DEPA | 12 | 3250 | 95,000 |
| 14 | TBIS-BAN | TFMB | DEPA | 12 | 3020 | 91,200 |
| 15 | 6FDA | TFMB | DEPA | 12 | 4600 | 77,000 |
| 16 | PMDA-HS | TFMB | DEPA | 12 | 3810 | 73,000 |
| 17 | TAHQ | TFMB | DEPA | 12 | 4200 | 98,900 |
| 18 | DSDA | TFMB | DEPA | 12 | 3050 | 81,000 |
| 19 | BPDA | PDA | DEPA | 12 | 4800 | 107,000 |
| 20 | BPDA | TFMB | DEPA | 12 | 4600 | 108,000 |
| 비교예No. | 이무수물 | 디아민 | 용매 | 고형분 농도(wt%) | 점도(cP) | Mw |
| 1 | PMDA | TFMB | DMAc | 12 | 12,000 | 100,400 |
| 2 | BPAF | TFMB | DMAc | 12 | 10,600 | 90,500 |
| 3 | ODPA | TFMB | DMAc | 12 | 8,100 | 96,500 |
| 4 | TBIS-BAN | TFMB | DMAc | 12 | 8,200 | 94,500 |
| 5 | 6FDA | TFMB | DMAc | 12 | 8,900 | 98,000 |
| 6 | PMDA-HS | TFMB | DMAc | 12 | 7,100 | 76,500 |
| 7 | TAHQ | TFMB | DMAc | 12 | 8,600 | 100,000 |
| 8 | DSDA | TFMB | DMAc | 12 | 7,300 | 91,000 |
| 9 | BPDA | PDA | DMAc | 12 | 10,090 | 102,000 |
| 10 | BPDA | TFMB | DMAc | 12 | 16,000 | 996,000 |
| 비교예 No. | 이무수물 | 디아민 | 용매 | 고형분 농도 (wt%) | 점도(cP) | Mw |
| 11 | PMDA | TFMB | NMP | 12 | 16,000 | 109,000 |
| 12 | BPAF | TFMB | NMP | 12 | 7,300 | 87,000 |
| 13 | ODPA | TFMB | NMP | 12 | 9,800 | 102,000 |
| 14 | TBIS-BAN | TFMB | NMP | 12 | 8,900 | 99,000 |
| 15 | 6FDA | TFMB | NMP | 12 | 8,300 | 82,000 |
| 16 | PMDA-HS | TFMB | NMP | 12 | 8,200 | 80,500 |
| 17 | TAHQ | TFMB | NMP | 12 | 9,700 | 103,000 |
| 18 | DSDA | TFMB | NMP | 12 | 8,900 | 93,000 |
| 19 | PMDA | PDA | NMP | 12 | 15,000 | 108,000 |
| 20 | BPDA | TFMB | NMP | 12 | 19,500 | 110,000 |
| 단위 | 실시예 1 | 실시예 2 | 실시예 5 | 실시예 9 | 실시예 10 | |
| PMDA_TFMB | BPAF_TFMB | 6FDA_TFMB | BPDA_PDA | BPDA_TFMB | ||
| 고형분 농도 | wt.% | 12 | 12 | 12 | 12 | 12 |
| 점도 | cP | 5010 | 3200 | 5100 | 6800 | 6700 |
| 분자량 | Mw | 101,000 | 70,500 | 78,000 | 100,000 | 107,000 |
| 두께 | ㎛ | 10 | 10 | 10 | 10 | 10 |
| CTE (100~450oC1st cooling) | ppm/℃ | -17 | 75 @~350℃ | 70 @ ~300℃ | 3.3 | 20 @ ~300℃ |
| Td_1% | ℃ | 535 | 530 | 501 | 565 | 546 |
| 연신율 | % | 23 | 15 | 20 | 15.4 | 20 |
| 인장강도 | Mpa | 290 | 150 | 190 | 343.3 | 230 |
| 인장모듈러스 | Gpa | 7.5 | 3.2 | 3.5 | 9.3 | 4.6 |
| 투과도(Tavar. 380~780nm) | % | 80 | 88 | 88 | 79 | 89 |
Claims (14)
- 폴리이미드 전구체와, 25℃ 분배계수(Log P)가 양수이고 밀도가 1g/cm3 이하인 아마이드계 유기용매를 포함하는 폴리이미드 전구체 용액.
- 제1항에 있어서,상기 유기용매를 포함하는 폴리이미드 전구체 용액의 고형분 함량이 10 내지 25 중량% 일 때 점도가 7000 cP 이하인 폴리이미드 전구체 용액.
- 제1항에 있어서,상기 유기용매가 디메틸프로피온아마이드(DMPA) 또는 디에틸프로피온아마이드(DEPA)를 포함하는 것인 폴리이미드 전구체 용액.
- 제4항에 있어서,상기 X가 하기 화학식 2a 내지 2g로 이루어진 군에서 선택된 하나의 4가 유기기인 폴리이미드 전구체 용액:[화학식 2a][화학식 2b][화학식 2c][화학식 2d][화학식 2e][화학식 2f][화학식 2g]상기 화학식 2a 내지 2g에서,상기 R31 내지 R42는 각각 독립적으로 탄소수 1 내지 10의 알킬기 또는 탄소수 1 내지 10의 플루오로알킬기이고,상기 a1은 0 내지 2의 정수, b1은 0 내지 4의 정수, c1은 0 내지 8의 정수, d1 및 e1은 각각 독립적으로 0 내지 3의 정수, f1 및 g1은 각각 독립적으로 0 내지 4의 정수, h1 및 j1은 각각 독립적으로 0 내지 3의 정수, i1은 0 내지 4의 정수, k1 및 l1은 각각 독립적으로 0 내지 4의 정수이며,상기 A1, A2, A3는 각각 독립적으로 단일결합, -O-, -CR46R47-, -C(=O)-, -C(=O)O-, -C(=O)NH-, -S-, -SO2-, 페닐렌기 및 이들의 조합으로 이루어진 군에서 선택되며, 이때 R46 및 R47은 각각 독립적으로 수소원자, 탄소수 1 내지 10의 알킬기 및 탄소수 1 내지 10의 플루오로알킬기로 이루어진 군으로부터 선택되는 것이다.
- 제4항에 있어서,상기 Y는 하기 화학식 4a 내지 4d로 이루어진 군에서 선택된 2가 유기기인 폴리이미드 전구체 용액:[화학식4a][화학식4b]상기 화학식4b에서, L1 은 단일결합, -O-, -CO-, -S-, -SO2-, -C(CH3)2-, -C(CF3)2-, -CONH-, -COO-, -(CH2)n1-, -O(CH2)n2O-, -OCH2-C(CH3)2-CH2O- 또는 -COO(CH2)n3OCO-이고, 상기 n1, n2 및 n3는 각각 1 내지 10의 정수이고,[화학식4c]상기 화학식4c에서, L2 및 L3는 서로 같거나 다를 수 있으며, 각각 독립적으로 단일결합, -O-, -CO-, -S-, -SO2-, -C(CH3)2-, -C(CF3)2-, -CONH-, -COO-, -(CH2)n1-, -O(CH2)n2O-, -OCH2-C(CH3)2-CH2O- 또는 -COO(CH2)n3OCO-이고, 상기 n1, n2 및 n3는 각각 1 내지 10의 정수이고,[화학식4d]상기 화학식4d에서, L4, L5 및 L6는 서로 같거나 다를 수 있으며, 각각 독립적으로 단일결합, -O-, -CO-, -S-, -SO2-, -C(CH3)2-, -C(CF3)2-, -CONH-, -COO-, -(CH2)n1-, -O(CH2)n2O-, -OCH2-C(CH3)2-CH2O- 또는 -COO(CH2)n3OCO-이고, 상기 n1, n2 및 n3는 각각 1 내지 10의 정수이고,상기 화학식 4a 내지 4d의 방향족 고리에 포함된 하나 이상의 수소 원자는 탄소수 1 내지 10의 알킬기 또는 탄소수 1 내지 10의 플루오로알킬기로부터 선택되는 치환기로 치환 또는 비치환될 수 있다.
- 제1항에 따른 폴리이미드 전구체 용액을 경화시켜 얻은 폴리이미드 필름.
- 제8항에 있어서,상기 폴리이미드 필름의 투과도가 380~780nm 파장의 범위에서 75% 이상인 것인 폴리이미드 필름.
- 제8항에 있어서,상기 폴리이미드 필름의 헤이즈가 1 이하인 폴리이미드 필름.
- 제8항에 있어서,상기 폴리이미드 필름의 열분해온도가 400℃ 이상인 폴리이미드 필름.
- 제8항에 있어서,상기 폴리이미드 필름의 연신율이 10% 이상이고, 인장강도가 30MPa 이상이며, 인장 모듈러스가 1 GPa 이상인 폴리이미드 필름.
- 제8항에 있어서,상기 폴리이미드 필름의 CTE가 -20 내지 90 ppm/℃인 폴리이미드 필름.
- 제8항에 따른 폴리이미드 필름을 포함하는 플렉서블 디스플레이 소자.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP18863468.7A EP3578590B1 (en) | 2017-09-29 | 2018-06-27 | Polyimide precursor solution and polyimide film produced using same |
| US16/617,379 US11479643B2 (en) | 2017-09-29 | 2018-06-27 | Polyimide precursor solution and polyimide film produced using same |
| JP2019542175A JP6849173B2 (ja) | 2017-09-29 | 2018-06-27 | ポリイミド前駆体溶液及びそれを用いて製造されたポリイミドフィルム |
| CN201880021171.9A CN110461910B (zh) | 2017-09-29 | 2018-06-27 | 聚酰亚胺前体溶液和使用其生产的聚酰亚胺膜 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20170127716 | 2017-09-29 | ||
| KR10-2017-0127716 | 2017-09-29 | ||
| KR1020180063124A KR102117151B1 (ko) | 2017-09-29 | 2018-06-01 | 폴리이미드 전구체 용액 및 이를 이용하여 제조된 폴리이미드 필름 |
| KR10-2018-0063124 | 2018-06-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019066204A1 true WO2019066204A1 (ko) | 2019-04-04 |
Family
ID=65902076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2018/007271 Ceased WO2019066204A1 (ko) | 2017-09-29 | 2018-06-27 | 폴리이미드 전구체 용액 및 이를 이용하여 제조된 폴리이미드 필름 |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2019066204A1 (ko) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160067413A (ko) * | 2014-12-04 | 2016-06-14 | 주식회사 엘지화학 | 폴리이미드계 용액 및 이를 이용하여 제조된 폴리이미드계 필름 |
| KR20160097685A (ko) * | 2015-02-09 | 2016-08-18 | 주식회사 엘지화학 | 폴리이미드계 필름 형성용 조성물 및 이를 이용하여 제조된 폴리이미드계 필름 |
| KR20160108252A (ko) * | 2015-03-05 | 2016-09-19 | 주식회사 엘지화학 | 광전소자의 플렉시블 기판용 폴리이미드 필름용 조성물 |
| KR20170057458A (ko) * | 2014-12-24 | 2017-05-24 | 유니티카 가부시끼가이샤 | 다공질 폴리이미드 필름 및 그의 제조 방법 |
| KR20170079896A (ko) * | 2015-12-31 | 2017-07-10 | 주식회사 동진쎄미켐 | 폴리이미드고분자 조성물, 이의 제조 방법 및 이를 이용한 폴리이미드 필름의 제조 방법 |
| KR20170127716A (ko) | 2016-05-12 | 2017-11-22 | 엘지디스플레이 주식회사 | 표시 장치 및 그 구동 방법 |
| KR20180063124A (ko) | 2015-10-14 | 2018-06-11 | 신에쯔 한도타이 가부시키가이샤 | 단결정 제조장치 및 융액면 위치의 제어방법 |
-
2018
- 2018-06-27 WO PCT/KR2018/007271 patent/WO2019066204A1/ko not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160067413A (ko) * | 2014-12-04 | 2016-06-14 | 주식회사 엘지화학 | 폴리이미드계 용액 및 이를 이용하여 제조된 폴리이미드계 필름 |
| KR20170057458A (ko) * | 2014-12-24 | 2017-05-24 | 유니티카 가부시끼가이샤 | 다공질 폴리이미드 필름 및 그의 제조 방법 |
| KR20160097685A (ko) * | 2015-02-09 | 2016-08-18 | 주식회사 엘지화학 | 폴리이미드계 필름 형성용 조성물 및 이를 이용하여 제조된 폴리이미드계 필름 |
| KR20160108252A (ko) * | 2015-03-05 | 2016-09-19 | 주식회사 엘지화학 | 광전소자의 플렉시블 기판용 폴리이미드 필름용 조성물 |
| KR20180063124A (ko) | 2015-10-14 | 2018-06-11 | 신에쯔 한도타이 가부시키가이샤 | 단결정 제조장치 및 융액면 위치의 제어방법 |
| KR20170079896A (ko) * | 2015-12-31 | 2017-07-10 | 주식회사 동진쎄미켐 | 폴리이미드고분자 조성물, 이의 제조 방법 및 이를 이용한 폴리이미드 필름의 제조 방법 |
| KR20170127716A (ko) | 2016-05-12 | 2017-11-22 | 엘지디스플레이 주식회사 | 표시 장치 및 그 구동 방법 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110121520B (zh) | 聚酰亚胺前体组合物和使用其的聚酰亚胺膜 | |
| WO2017209413A1 (ko) | 고강도 투명 폴리아미드이미드 및 이의 제조방법 | |
| KR102117151B1 (ko) | 폴리이미드 전구체 용액 및 이를 이용하여 제조된 폴리이미드 필름 | |
| WO2018056573A1 (ko) | 폴리이미드 전구체 용액 및 이의 제조방법 | |
| WO2019054616A1 (ko) | 폴리이미드 공중합체 및 이를 이용한 폴리이미드 필름 | |
| WO2017209414A1 (ko) | 고강도 투명 폴리아미드이미드 및 이의 제조방법 | |
| WO2015183056A1 (ko) | 폴리이미드계 용액 및 이를 이용하여 제조된 폴리이미드계 필름 | |
| WO2017188630A1 (ko) | 고강도 투명 폴리아미드이미드 및 이의 제조방법 | |
| WO2017111299A1 (ko) | 접착력이 향상된 폴리아믹산 조성물 및 이를 포함하는 폴리이미드 필름 | |
| WO2019103274A1 (ko) | 디스플레이 기판용 폴리이미드 필름 | |
| WO2017179877A1 (ko) | 무색 투명한 폴리아마이드-이미드 필름 및 이의 제조방법 | |
| WO2019160218A1 (ko) | 저장 안정성이 향상된 폴리아믹산 조성물, 이를 이용한 폴리이미드 필름의 제조방법 및 이로 제조된 폴리이미드 필름 | |
| WO2017111289A1 (ko) | 지환족 모노머가 적용된 폴리아믹산 조성물 및 이를 이용한 투명 폴리이미드 필름 | |
| WO2018080222A2 (ko) | 폴리이미드 필름 형성용 조성물 및 이를 이용하여 제조된 폴리이미드 필름 | |
| WO2017204462A1 (ko) | 폴리아미드이미드, 이의 제조방법 및 이를 이용한 폴리아미드이미드 필름 | |
| WO2018117551A1 (ko) | 투명 폴리이미드 필름 | |
| WO2020138645A1 (ko) | 폴리아믹산 조성물, 및 이를 이용한 투명 폴리이미드 필름 | |
| WO2020141713A1 (ko) | 신규한 디카르보닐 화합물을 포함하는 폴리아믹산 조성물의 제조방법, 폴리아믹산 조성물, 이를 이용한 폴리아미드-이미드 필름의 제조방법 및 그 제조방법을 통해 제조된 폴리아미드-이미드 필름. | |
| WO2016140559A1 (ko) | 광전소자의 플렉시블 기판용 폴리이미드 필름용 조성물 | |
| WO2022145890A1 (ko) | 광학 특성이 개선된 광학 필름, 이를 포함하는 표시장치 및 이의 제조방법 | |
| WO2020209625A1 (ko) | 폴리아미드-이미드 블록 공중합체, 이의 제조방법 및 이를 포함하는 폴리아미드-이미드 필름 | |
| WO2020159193A1 (ko) | 폴리이미드 전구체 조성물 및 이로부터 제조된 폴리이미드 필름, 디스플레이 장치용 기판, 및 광학 장치 | |
| WO2020141710A1 (ko) | 폴리아믹산 조성물의 제조방법, 폴리아믹산 조성물, 이를 이용한 폴리이미드 필름의 제조방법 및 그 제조방법을 통해 제조된 폴리이미드 필름. | |
| WO2018021747A1 (ko) | 폴리이미드 전구체 용액 및 이의 제조방법 | |
| WO2022108046A1 (ko) | 폴리이미드 수지 필름, 이를 이용한 플렉서블 디스플레이 장치용 기판, 및 플렉서블 디스플레이 장치 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18863468 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2019542175 Country of ref document: JP Kind code of ref document: A |
|
| ENP | Entry into the national phase |
Ref document number: 2018863468 Country of ref document: EP Effective date: 20190904 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWG | Wipo information: grant in national office |
Ref document number: 2018863468 Country of ref document: EP |










































