WO2023106843A1 - 유리섬유 분말을 이용한 고내열 및 내화학성 폴리이미드 분말 및 제조방법 - Google Patents
유리섬유 분말을 이용한 고내열 및 내화학성 폴리이미드 분말 및 제조방법 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- 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
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
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- 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
- C08G73/1003—Preparatory processes
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- 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
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
- C08G73/1028—Preparatory processes from tetracarboxylic acids or derivatives and diamines characterised by the process itself, e.g. steps, continuous
- C08G73/1032—Preparatory processes from tetracarboxylic acids or derivatives and diamines characterised by the process itself, e.g. steps, continuous characterised by the solvent(s) used
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- 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
- C08G73/1042—Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds
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- 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
- C08G73/1046—Polyimides containing oxygen in the form of ether bonds in the main chain
- C08G73/1053—Polyimides containing oxygen in the form of ether bonds in the main chain with oxygen only in the tetracarboxylic moiety
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- 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
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- 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
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- 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
- C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
- C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
Definitions
- the present invention relates to a highly heat-resistant and chemical-resistant polyimide powder using glass fiber powder and a manufacturing method.
- polyimide is a polymer of imide monomers formed by solution polymerization of dianhydride and diamine or diisocyanate, and has excellent strength, chemical resistance, weather resistance and heat resistance based on the chemical stability of the imide ring. mechanical properties such as
- polyimide is in the limelight as a high-functional polymer material applicable to a wide range of industries such as electronics, communication, and optics due to its excellent electrical properties such as insulating properties and low permittivity.
- the conventional polyimide has excellent insulation properties and heat resistance properties as described above, but has a problem of poor stability at a high temperature of the level of 800 °C.
- a ceramic material among inorganic materials for high-temperature stability of the conventional polyimide powder processing is difficult, and when used as a metal material among inorganic materials, it is difficult to use it as an insulating material due to low insulation.
- An object of the present invention is to solve the problems and technical problems of the prior art as described above.
- the present invention provides a high heat-resistant polyimide powder capable of securing stability at a high temperature of 800° C. while maintaining insulation, and a manufacturing method thereof.
- the present invention also provides a chemical resistant polyimide powder capable of ensuring stability against acids and/or bases and a method for producing the same.
- the present invention relates to polyimide powder and a method for producing the same.
- the polyimide powder according to the present invention has a dianhydride monomer component and a diamine monomer component as polymerized units.
- Conventional polyimide has excellent insulating properties and heat resistance properties as described above, but has a problem of poor stability or chemical resistance at a high temperature of 800 ° C. level.
- a ceramic material among inorganic materials for high-temperature stability of the conventional polyimide powder processing is difficult, and when used as a metal material among inorganic materials, it is difficult to use it as an insulating material due to low insulation.
- the present invention is polymerized using glass fiber powder together with a dianhydride monomer component and a diamine monomer component, thereby maintaining high heat resistance that can secure stability at a high temperature of 800 ° C. while maintaining insulation, and chemical resistance that is resistant to acids and alkalis.
- Polyimide powder can be provided.
- a method for producing a polyimide powder according to an embodiment of the present invention includes preparing a polyamic acid solution by solution polymerization of a dianhydride monomer and a diamine monomer in an organic solvent containing glass fibers; preparing a polyimide mixed solution by heating the polyamic acid solution; and filtering and drying the precipitate present in the mixed solution to obtain polyimide powder.
- polyimide powder was prepared by dispersing dianhydride monomers and diamine monomers in an aqueous solvent to prepare a dispersion, and then heat-treating.
- a dispersion is prepared by further including glass fiber powder in an aqueous solvent and heat treated, the glass fiber powder aggregates in the dispersion, resulting in a decrease in dispersibility.
- a dianhydride monomer, a diamine monomer, and glass fiber are dispersed in a mixed organic solvent to form a polymerization solution (varnish), and then heat-treated to prepare a polyimide powder. Therefore, the dispersibility of the glass fiber may be good.
- the shape of the glass fiber is not particularly limited, but may be used in the form of a chop strand or a powdered form of the same. Particularly considering dispersibility, powder having a diameter of 5 ⁇ m or more, 7 ⁇ m or more, or 9 ⁇ m or more, and also having a diameter of 18 ⁇ m or less, 15 ⁇ m or less, or 12 ⁇ m or less may be used.
- glass fiber is not particularly limited, but glass fibers having high acid resistance, base resistance, and electrical resistance may be used.
- the content of the glass fiber contained in the organic solvent is, for example, 5 to 90 parts by weight, 6 to 70 parts by weight, 7 to 60 parts by weight, or 8 to 55 parts by weight based on 100 parts by weight of the total dianhydride monomer and diamine monomer. , or 10 to 50 parts by weight. If the content of glass fiber is too small, it is difficult to secure stability or chemical resistance at a high temperature of the level of 800 ° C., and if the content is too large, mechanical properties such as tensile strength or elongation may deteriorate.
- a mixed solvent of an aprotic solvent and a protic solvent may be used.
- a mixed solvent there is an advantage in that moldability and processability are excellent compared to the case of using an aprotic solvent alone or a protic solvent alone.
- the aprotic solvent serves as a kind of imidization catalyst, and the proton solvent serves to increase molecular weight.
- the aprotic solvent is not particularly limited, but toluene, xylene, naphtha, anisole, cresol, ethylbenzene, propylbenzene, chlorobenzene, dichlorobenzene, trichlorobenzene, biphenyl, terphenyl, diphenyl ether, diphenyl At least one selected from the group consisting of sulfide, acetophenone, chlorinated biphenyl, and chlorinated diphenyl ether may be used.
- the protic solvent is not particularly limited, but N-methyl-pyrrolidone (NMP), N,N'-dimethylformamide (DMF), N,N'-diethylformamide (DEF), N,N'- Dimethylacetamide (DMAc), dimethylpropanamide (DMPA), N,N-diethylacetamide (DEAc), 3-methoxy-N,N-dimethylpropanamide (KJCMPA), and gamma butyrolactone (GBL) ) can use one or more selected from the group consisting of.
- NMP N,N'-dimethylformamide
- DEF N,N'-diethylformamide
- DMAc Dimethylacetamide
- DMPA dimethylpropanamide
- DEAc N,N-diethylacetamide
- KJCMPA 3-methoxy-N,N-dimethylpropanamide
- GBL gamma butyrolactone
- the mixed solvent may include 10 to 90 wt% of the aprotic solvent and 10 to 90 wt% of the protic solvent, for example, 20 to 80 wt% of the aprotic solvent and 20 to 80 wt% of the protic solvent. If the content of the aprotic solvent is too small, there is a disadvantage in that imidization is not sufficiently achieved in the heating process and moldability is not secured and the intrinsic viscosity (IV) is lowered. If the content is too large, the molecular weight of the polymerization solution is too slow (chain is formed too small) and there is a disadvantage in that formability is not secured during subsequent molding of the molded product.
- the step of preparing the polyamic acid solution may be performed at 50 to 100 ° C, for example, 60 to 90 ° C, 65 to 85 ° C, or 70 to 80 ° C, and the step of preparing the polyimide mixture may be performed at 160 to 200 ° C, For example, it may be performed at 170 to 190 °C or 175 to 185 °C.
- the heating temperature When the heating temperature is lower than the above range, mechanical properties such as elongation and tensile strength may be deteriorated, and thus fracture may occur during molding, resulting in reduced yield and reduced workability. In addition, when the heating temperature is higher than the above range, the color of the powder may become dark and the particle size may increase.
- the step of preparing the polyamic acid solution and/or the step of preparing the polyimide mixed solution may be performed under pressurized conditions, for example, 1 to 10 bar.
- the polymerization reaction can be performed under normal pressure or pressurized conditions of 1 bar to 3 bar or less.
- inert gas may be injected into the reactor or steam generated inside the reactor may be used.
- nitrogen, argon, helium or neon may be used.
- the reaction time of preparing the polyamic acid solution and/or preparing the polyimide mixed solution may be 1 to 20 hours, for example, 1 to 10 hours, 1 to 8 hours, 1 to 6 hours, or 1 hour. to 4 hours.
- reaction time When the reaction time is lower than the above range, the reaction yield is lowered and mechanical properties such as elongation and tensile strength are lowered, and thus breakage occurs during molding processing, which may lower yield and lower processability.
- reaction time when the reaction time is higher than the above range, the color of the powder may become dark and the particle size may increase.
- the step of obtaining the polyimide powder is a step of obtaining the polyimide powder by filtering and drying the precipitate present in the mixed solution.
- the method of filtering and drying is not particularly limited, and may be, for example, vacuum drying or oven drying.
- the dianhydride monomer is not particularly limited as long as it can react with the diamine monomer to form polyimide.
- the dianhydride monomer according to the present invention is pyromellitic dianhydride (PMDA), 3,3',4,4'-biphenyltetracarboxylic dianhydride (s-BPDA), 2, 3,3',4'-biphenyltetracarboxylic dianhydride (a-BPDA), 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA), oxydiphthalic dianhydride at least selected from the group consisting of hydride (ODPA), 4,4-(hexafluoroisopropylidene)diphthalic anhydride (6-FDA) and p-phenylenebis(trimellitate anhydride) (TAHQ) may contain one.
- PMDA pyromellitic dianhydride
- s-BPDA 3,3',4,4'-
- the diamine monomer is not particularly limited as long as it can react with the dianhydride monomer to form polyimide.
- the diamine monomer according to the present invention is 1,4-diaminobenzene (PPD), 1,3-diaminobenzene (MPD), 2,4-diaminotoluene, 2,6-diaminotoluene, 4 ,4'-diaminodiphenyl ether (ODA), 4,4'-methylenediamine (MDA), 4,4-diaminobenzanilide (4,4-DABA), N,N-bis(4-amino Phenyl)benzene-1,4-dicarboxamide (BPTPA), 2,2-dimethylbenzidine (M-TOLIDINE), 2,2-bis(trifluoromethyl)benzidine (TFDB), 1,4-bisaminophenoxy Consisting of benzene (TPE-Q), bisaminophenoxybenzene (TPE-R), 2,2-bis
- a molar ratio (b/a) representing the number of moles (b) of the diamine monomer component to the number (a) of moles of the dianhydride monomer component is 1 or less.
- the upper limit of the molar ratio (b/a) of the diamine monomer component to the dianhydride monomer component may be 0.99 or less, 0.98 or less, 0.97 or less, 0.96 or less, or 0.95 or less, and the lower limit of the molar ratio may be 0.9 or more.
- the molar ratio of the diamine monomer component to the dianhydride monomer component is 0.9 to 0.99, 0.93 to 0.99, 0.94 to 0.99, 0.95 to 0.99, 0.95 to 0.98 or 0.96 to 0.98.
- the present invention has fewer moles of diamine monomer component than moles of dianhydride monomer component.
- polyimide may be prepared by a 1:1 reaction between dianhydride monomer and diamine monomer, but the reaction proceeds mainly in the presence of a solvent and/or catalyst. Side reactions may proceed, so diamine is generally added in excess or dianhydride and diamine are added in equal mole numbers.
- the solid content in the mixed solvent may be 1 to 30% by weight.
- the solid content may mean a dianhydride monomer component and a diamine monomer component.
- the solid content in the mixed solvent may be 1 to 20% or 10 to 20%.
- a dianhydride monomer component, a diamine monomer component, and glass fiber powder are dispersed in a mixed solvent to form a polymerization solution (varnish), and then heat-treated to obtain polyimide Since the powder is prepared, the intrinsic viscosity of the polyimide powder is higher (> 0.9 dL/g) compared to the conventional water-based polymerization method, and the moldability and processability are excellent.
- Polyimide powder according to another embodiment of the present invention includes a polyimide matrix having polymerized units derived from a dianhydride monomer and a diamine monomer, and glass fibers dispersed in the polyimide matrix, and at least one of the following conditions Satisfies:
- the glass fiber powder may be included in an amount of 0.01 to 90 parts by weight, preferably 0.1 to 50 parts by weight, based on 100 parts by weight of the polyimide powder.
- the glass fiber powder may be included during polymerization of the polyimide powder or may be further mixed with the polyimide powder.
- the polyimide powder may have a weight loss rate of 35% or less, for example, 34% or less, 33% or less, 10 to 35%, 15 to 34%, or 18% to 32%, measured after being left at 800° C. for 25 hours.
- weight loss rate is 35% or more, high-temperature heat resistance may be insufficient.
- the polyimide powder may have a surface resistance of 10 14 ⁇ /cm 2 or more as measured by ASTM D257.
- the polyimide powder according to the present invention may have a lower limit of surface resistance of 10 14 ⁇ /cm 2 or more and an upper limit of 10 15 ⁇ /cm 2 or less of surface resistance measured according to ASTM D257. If the surface resistance is less than 10 14 ⁇ /cm 2 , insulation properties may be insufficient.
- the polyimide powder may have a weight loss rate of 2.6% or less, for example, 2.5% or less, 0.5 to 2.6%, or 1 to 2.5%, measured after immersion in an acidic aqueous solution having a pH of 5 or less for 168 hours.
- the acidic aqueous solution having a pH of 5 or less is not particularly limited, but, for example, a 45 to 55 wt% hydrofluoric acid aqueous solution may be used.
- the measurement temperature or pressure is not particularly limited, but may be measured at room temperature or pressure.
- the polyimide powder may have a weight loss rate of 15% or less, for example, 13% or less, 1 to 11%, or 2 to 10%, measured after being immersed in an alkaline aqueous solution having a pH of 9 or more for 168 hours.
- the alkaline aqueous solution having a pH of 9 or higher is not particularly limited, but, for example, a 20 to 30 wt% aqueous ammonia solution may be used.
- the measurement temperature or pressure is not particularly limited, but may be measured at room temperature or pressure.
- the dianhydride monomer of the polyimide powder is pyromellitic dianhydride (PMDA), 3,3',4,4'-biphenyltetracarboxylic dianhydride (s-BPDA), 2,3,3 ',4'-biphenyltetracarboxylic dianhydride (a-BPDA), 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA), oxydiphthalic dianhydride (ODPA), 4,4- (hexafluoroisopropylidene) diphthalic anhydride (6-FDA) and p-phenylenebis (trimellitate anhydride) (TAHQ) containing at least one selected from the group consisting of can do.
- PMDA pyromellitic dianhydride
- s-BPDA 3,3',4,4'-biphenyltetracarboxylic dianhydride
- a-BPDA 2,3,3 ',4'
- the diamine monomer of the polyimide powder is 1,4-diaminobenzene (PPD), 1,3-diaminobenzene (MPD), 2,4-diaminotoluene, 2,6-diaminotoluene, 4,4' -Diaminodiphenyl ether (ODA), 4,4'-methylenediamine (MDA), 4,4-diaminobenzanilide (4,4-DABA), N,N-bis(4-aminophenyl)benzene -1,4-dicarboxamide (BPTPA), 2,2-dimethylbenzidine (M-TOLIDINE), 2,2-bis(trifluoromethyl)benzidine (TFDB), 1,4-bisaminophenoxybenzene (TPE) -Q), bisaminophenoxybenzene (TPE) -R), 2,2-bisaminophenoxyphenylpropane (BAPP) and 2,2-bisaminophenoxyphenylhexafluoroprop
- the present invention provides a method for manufacturing a polyimide molded article including the step of pressurizing and molding the above-described polyimide powder.
- the pressure molding may be performed at a pressure of 30 to 1000 MPa, and the pressure molding may be performed at 200 to 500 °C.
- the pressure molding step may further include a step of performing the pressure molding at room temperature and sintering the pressure-molded polyimide powder at 200 to 500°C. If the pressure is lower than the above range, moldability of the powder may be insufficient during molding, and if the pressure is high, the processability of the molded product may be deteriorated. If the temperature is lower than the above range, the flowability of the molecules may not be ensured, and moldability may be significantly lowered. If the temperature is higher, some may be oxidized due to overheating.
- the present invention also provides a molded article manufactured using polyimide powder.
- the polyimide powder produced according to the present invention can be made into molded articles by various molding methods, for example, compression molding, injection molding, slush molding, blow molding, extrusion molding, or spinning. can be manufactured.
- the shape of the molded article is not limited, but may be a film, sheet, pellet, tube, belt, injection molded article or extruded article.
- the polyimide powder prepared according to the present invention can be used in various fields such as electric/electronic, semiconductor, display, automobile, medical, battery, and aerospace.
- the polyimide powder according to the present application can increase the surface resistance of the molded article to 10 14 ⁇ /cm 2 or more, so that insulation can be maintained.
- the polyimide powder according to the present application includes glass fiber powder as a filler, it is possible to secure stability at a high temperature of the level of 800° C. while maintaining insulation unlike other fillers.
- the polyimide powder according to the present application has a mass change rate of 1.0% to 2.6% measured when immersed in a hydrofluoric acid solution and a mass change rate measured when immersed in ammonia water is 2.0% to 10.0%, and has chemical resistance compared to conventional polyimide powder. This is excellent
- 900g of a mixed solvent of 30wt% of m-xylene and 70wt% of NMP (N-methylpyrrolidone), 46g of ODA, 10g of glass fiber powder, 40g of PMDA, and 14g of ODPA were sequentially added to a glass reactor, followed by 2 While stirring for a while, a polyamic acid solution was prepared.
- the completed polyamic acid solution was heated at 180° C. for 2 hours at normal pressure to prepare a polyimide mixture.
- the powder precipitated in the mixture was filtered, washed with ethanol, and dried for 24 hours to prepare polyimide powder.
- a molded article was prepared by pressing the prepared powder at >50 MPa and >300 °C.
- a molded article was prepared in the same manner as in Example 1, except that 15 g of glass fiber powder was used.
- a molded article was prepared in the same manner as in Example 1, except that 20 g of glass fiber powder was used.
- a molded article was prepared in the same manner as in Example 1, except that 30 g of glass fiber powder was used.
- a molded article was prepared in the same manner as in Example 1, except that 40 g of glass fiber powder was used.
- a molded article was prepared in the same manner as in Example 1, except that 50 g of glass fiber powder was used.
- polyimide powder was prepared in the same manner as in Example 1, except that the components of the filler were different.
- Comparative Example 1 is a case in which no filler is added
- Comparative Examples 2 to 5 are cases in which conventional fillers of various components are added.
- weight loss analysis compression molded specimens (5mm * 5mm * 5mm cube shape) of polyimide powder were used, and weight loss rate (%) at 800 ° C was measured using a thermogravimetric analyzer (TGA). Specifically, the weight loss rate was compared by leaving it at 800 ° C. for 25 hours under an air pressure of 0.61 Mpa.
- TGA thermogravimetric analyzer
- % weight loss (initial weight - weight after exposure)/initial weight ⁇ 100
- a compression molded specimen of polyimide powder was used, and the surface resistance of Examples and Comparative Examples was measured according to the ASTM D257 standard. Specifically, the measurement of surface resistance was measured under the conditions of 55% RH, 23 °C, applied voltage of 500V according to the ASTM-D257 measurement method, and the measurement equipment was 4-point probe meter (CMT-SR 1000N, AIT). measured.
- the polyimide powder having a dianhydride monomer component and a diamine monomer component as polymerized units, as in the present invention.
- the surface resistance is 10 14 ⁇ /cm 2 or more
- the weight loss rate (%) at 800 ° C is 18.1% to 31.5%, and stability can be secured at a high temperature of the 800 ° C level while maintaining insulation.
- the weight loss rate (%) at 800 ° C. was 18.1%, indicating that it had excellent high heat resistance.
- the method for producing polyimide powder according to the present application is prepared by mixing glass fibers during in-situ polymerization, the polyimide powder has excellent dispersibility and is more uniform because the glass fibers act as seeds. powder production is possible.
- the polyimide powder according to the present application includes an aromatic chain and further includes a glass fiber powder as a filler, heat resistance may be superior to that of the conventional polyimide powder.
- polyimide moldings were processed into 5mm * 5mm * 5mm cube-shaped specimens and used.
- the cube specimen is immersed in 49% hydrofluoric acid solution for 168 hours. Appearance change and weight loss rate after immersion were measured.
- the cube-shaped specimen was immersed in 25-28% ammonia water for 168 hours, and the appearance change and weight loss rate before and after immersion were measured.
- Table 3 shows the intrinsic viscosity (IV) according to an example using an aprotic solvent and a mixed solvent of the protic solvent according to an embodiment of the present invention and a comparative example in the case of using the aprotic solvent alone or the protic solvent alone, Experimental results comparing formability and processability are shown.
- Comparative Example 6 is the case of using m-cresol alone
- Comparative Example 7 is the same as Example 1 except that NMP was used alone.
- Example 7 is a case of a 50/50 wt% mixture of m-cresol/NMP
- Example 8 is a case of a 30/70 wt% mixture of m-cresol/NMP
- Example 9 is a case of m-cresol/NMP This is the same case as Example 1 except for the 70/30 wt% mixed solution.
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Abstract
Description
| 물성 | 필러 타입 | 필러 함량 | 중량 손실율 (~800℃) |
표면 저항 |
| 단위 | g | % | Ω/cm2 | |
| ASTM | - | D257 | ||
| 실시예2 | 유리섬유 분말 | 15 | 31.5 | 1015 |
| 실시예4 | 유리섬유 분말 | 30 | 27.8 | 1015 |
| 실시예5 | 유리섬유 분말 | 40 | 25.4 | 1014 |
| 실시예6 | 유리섬유 분말 | 50 | 18.1 | 1014 |
| 비교예1 | - | - | 36.2 | 1015 |
| 비교예2 | 그라파이트 | 15 | 32.2 | 1012 |
| 비교예3 | 그라파이트 | 40 | 25.1 | 108 |
| 비교예4 | 징크옥사이드 | 30 | 24.8 | 108 |
| 비교예5 | 포타슘티타네이트 | 30 | 24.6 | 1012 |
| 물성 | 필러타입 | 필러함량 | 중량손실율(불산) | 중량손실율 (암모니아수) |
| 단위 | g | % | % | |
| 실시예1 | 유리섬유 분말 | 10 | 2.4 | 8.7 |
| 실시예3 | 유리섬유 분말 | 20 | 2.0 | 7.1 |
| 실시예4 | 유리섬유 분말 | 30 | 1.4 | 4.4 |
| 실시예6 | 유리섬유 분말 | 50 | 1.2 | 2.1 |
| 비교예1 | - | - | 2.8 | 27.8 |
| 용매 | 비교예6 | 비교예7 | 실시예7 | 실시예8 | 실시예9 |
| 고유점도(IV) | 0.95 | 0.65 | 1.28 | 0.9 | 1.18 |
| 성형성 | X | X | O | O | O |
| 가공성 | X | X | O | O | O |
Claims (18)
- 유리섬유를 포함하는 유기 용매 내에서 디안하이드라이드 단량체와 디아민 단량체를 용액 중합시켜서 폴리아믹산 용액을 제조하는 단계;상기 폴리아믹산 용액을 가열하여 폴리이미드 혼합액을 제조하는 단계; 및상기 혼합액 내에 존재하는 침전물을 여과 및 건조하여 폴리이미드 분말을 수득하는 단계를 포함하는, 폴리이미드 분말의 제조방법.
- 제1항에 있어서,유기 용매 내에 포함되는 상기 유리섬유의 함량은 디안하이드라이드 단량체와 디아민 단량체 총합 100 중량부에 대하여 5 내지 90 중량부인 폴리이미드 분말의 제조방법.
- 제1항에 있어서,상기 유기 용매는 비양자성 용매 및 양자성 용매의 혼합 용매인 폴리이미드 분말의 제조방법.
- 제3항에 있어서,상기 비양자성 용매는 톨루엔, 자일렌, 나프타, 아니솔, 크레졸, 에틸벤젠, 프로필벤젠, 클로로벤젠, 다이클로로벤젠, 트라이클로로벤젠, 바이페닐, 터페닐, 다이페닐에테르, 다이페닐 설파이드, 아세토페논, 염소화 바이페닐, 및 염소화 다이페닐에테르로 이루어진 그룹 중에서 선택된 하나 이상이고,상기 양자성 용매는 N-메틸-피롤리돈(NMP), N,N'-디메틸포름아미드(DMF), N,N'-디에틸포름아미드(DEF), N,N'-디메틸아세트아미드(DMAc), 디메틸프로판아미드(DMPA), N,N-디에틸아시트아마이드(DEAc), 3-메톡시-N,N-디메틸프로판아마이드(KJCMPA), 및 감마부티로락톤(GBL)로 이루어진 그룹 중에서 선택된 하나 이상인 폴리이미드 분말의 제조방법.
- 제3항에 있어서,상기 혼합 용매는 비양자성 용매 10 내지 90 wt% 및 양자성 용매 10 내지 90 wt%를 포함하는 폴리이미드 분말의 제조방법.
- 제1항에 있어서,상기 폴리아믹산 용액을 제조하는 단계는 50 내지 100℃에서 수행되는 폴리이미드 분말의 제조방법.
- 제1항에 있어서,상기 폴리이미드 혼합액을 제조하는 단계는 140 내지 200℃에서 수행되는 폴리이미드 분말의 제조방법.
- 제1항에 있어서,상기 디안하이드라이드 단량체는 피로멜리틱 디안하이드라이드(PMDA), 3,3',4,4'-바이페닐테트라카르복실릭 디안하이드라이드(s-BPDA), 2,3,3',4'-바이페닐테트라카르복실릭 디안하이드라이드(a-BPDA), 3,3',4,4'-벤조페논테트라카르복실릭 디안하이드라이드(BTDA), 옥시디프탈릭 디안하이드라이드(ODPA), 4,4-(헥사플루오르이소프로필리덴)디프탈릭 안하이드라이드(6-FDA) 및 p-페닐렌비스(트리멜리테이트 안하이드라이드)(TAHQ)로 이루어진 군에서 선택된 적어도 하나를 포함하는 폴리이미드 분말의 제조방법.
- 제1항에 있어서,상기 디아민 단량체는 1,4-디아미노벤젠(PPD), 1,3-디아미노벤젠(MPD), 2,4-디아미노톨루엔, 2,6-디아미노톨루엔, 4,4'-디아미노디페닐에테르(ODA), 4,4'-메틸렌디아민(MDA), 4,4-디아미노벤즈아닐라이드(4,4-DABA), N,N-비스(4-아미노페닐)벤젠-1,4-디카르복아마이드(BPTPA), 2,2-디메틸벤지딘(M-TOLIDINE), 2,2-비스(트리플루오르메틸)벤지딘(TFDB), 1,4-비스아미노페녹시벤젠(TPE-Q), 비스아미노페녹시벤젠(TPE-R), 2,2-비스아미노페녹시페닐프로판(BAPP) 및 2,2-비스아미노페녹시페닐헥사플루오로프로판(HFBAPP)로 이루어진 군에서 선택된 적어도 하나를 포함하는 폴리이미드 분말의 제조방법.
- 디안하이드라이드 단량체와 디아민 단량체로부터 유도된 중합 단위로 가지는 폴리이미드 메트릭스, 및상기 폴리이미드 메트릭스 내에 분산된 유리섬유를 포함하고,하기 조건 중에 하나 이상을 만족하는 폴리이미드 분말:a) 800℃에서 25시간 방치 후 측정한 중량 손실율이 35% 이하이고, 표면저항이 1014 Ω/cm2 이상;b) pH가 5 이하인 산성 수용액에서 168 시간 침지 후 측정한 중량 손실율이 2.6% 이하; 또는c) pH가 9 이상인 알칼리 수용액에서 168 시간 침지 후 측정한 중량 손실율이 15% 이하.
- 제10항에 있어서,폴리이미드 분말 100 중량부에 대하여, 0.01 내지 90 중량부의 유리섬유 분말을 포함하는 폴리이미드 분말.
- 제10항에 있어서,상기 디안하이드라이드 단량체는 피로멜리틱 디안하이드라이드(PMDA), 3,3',4,4'-바이페닐테트라카르복실릭 디안하이드라이드(s-BPDA), 2,3,3',4'-바이페닐테트라카르복실릭 디안하이드라이드(a-BPDA), 3,3',4,4'-벤조페논테트라카르복실릭 디안하이드라이드(BTDA), 옥시디프탈릭 디안하이드라이드(ODPA), 4,4-(헥사플루오르이소프로필리덴)디프탈릭 안하이드라이드(6-FDA) 및 p-페닐렌비스(트리멜리테이트 안하이드라이드)(TAHQ)로 이루어진 군에서 선택된 적어도 하나를 포함하는 폴리이미드 분말.
- 제10항에 있어서,상기 디아민 단량체는 1,4-디아미노벤젠(PPD), 1,3-디아미노벤젠(MPD), 2,4-디아미노톨루엔, 2,6-디아미노톨루엔, 4,4'-디아미노디페닐에테르(ODA), 4,4'-메틸렌디아민(MDA), 4,4-디아미노벤즈아닐라이드(4,4-DABA), N,N-비스(4-아미노페닐)벤젠-1,4-디카르복아마이드(BPTPA), 2,2-디메틸벤지딘(M-TOLIDINE), 2,2-비스(트리플루오르메틸)벤지딘(TFDB), 1,4-비스아미노페녹시벤젠(TPE-Q), 비스아미노페녹시벤젠(TPE-R), 2,2-비스아미노페녹시페닐프로판(BAPP) 및 2,2-비스아미노페녹시페닐헥사플루오로프로판(HFBAPP)로 이루어진 군에서 선택된 적어도 하나를 포함하는 폴리이미드 분말.
- 제10항의 폴리이미드 분말을 가압 성형하는 단계를 포함하는 폴리이미드 성형품의 제조 방법.
- 제14항에 있어서, 가압 성형하는 단계는 30 내지 1,000MPa의 압력에서 수행되는 폴리이미드 성형품의 제조 방법.
- 제14항에 있어서, 가압 성형하는 단계는 200 내지 500℃에서 수행되는 폴리이미드 성형품의 제조 방법.
- 제14항에 있어서, 가압 성형된 폴리이미드 분말을 200 내지 500℃에서 소결하는 단계를 추가로 포함하는 폴리이미드 성형품의 제조 방법.
- 제14항 내지 제17항 중 어느 한 항의 제조 방법에 의해 제조된 폴리이미드 성형품.
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| US18/718,316 US20250043084A1 (en) | 2021-12-08 | 2022-12-07 | High-heat-resistant and chemical-resistant polyimide powder using glass fiber powder, and preparation method therefor |
| EP22904672.7A EP4446361A1 (en) | 2021-12-08 | 2022-12-07 | High-heat-resistant and chemical-resistant polyimide powder using glass fiber powder, and preparation method therefor |
| JP2024534378A JP2024545151A (ja) | 2021-12-08 | 2022-12-07 | ガラスファイバー粉末を利用した高耐熱及び耐化学性ポリイミド粉末及び製造方法 |
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2021
- 2021-12-08 KR KR1020210174321A patent/KR102703139B1/ko active Active
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2022
- 2022-12-07 CN CN202280081656.3A patent/CN118401588A/zh active Pending
- 2022-12-07 EP EP22904672.7A patent/EP4446361A1/en active Pending
- 2022-12-07 WO PCT/KR2022/019855 patent/WO2023106843A1/ko not_active Ceased
- 2022-12-07 US US18/718,316 patent/US20250043084A1/en active Pending
- 2022-12-07 JP JP2024534378A patent/JP2024545151A/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10152558A (ja) * | 1996-11-25 | 1998-06-09 | Jsr Corp | 結晶性ポリイミドの製造方法 |
| KR101641210B1 (ko) * | 2013-09-05 | 2016-07-20 | 주식회사 엘지화학 | 저열팽창 프리프레그의 제조방법 및 금속박 적층판의 제조방법 |
| KR20150113927A (ko) * | 2014-03-31 | 2015-10-08 | 신닛테츠 수미킨 가가쿠 가부시키가이샤 | 플렉서블 디바이스의 제조방법, 플렉서블 디바이스 제조장치, 플렉서블 디바이스 및 액상 조성물 |
| KR20180044128A (ko) * | 2016-10-21 | 2018-05-02 | 한국전기연구원 | 전착코팅용 이미드계 고분자 콜로이드 분산액 및 그 제조방법 |
| KR20210070335A (ko) * | 2018-10-02 | 2021-06-14 | 카네카 아메리카즈 홀딩 인코포레이티드 | 폴리이미드 복합재를 성형하는 신규 아미드산 올리고머 방법 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118401588A (zh) | 2024-07-26 |
| KR20230086042A (ko) | 2023-06-15 |
| KR102703139B1 (ko) | 2024-09-05 |
| JP2024545151A (ja) | 2024-12-05 |
| US20250043084A1 (en) | 2025-02-06 |
| EP4446361A1 (en) | 2024-10-16 |
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