WO2020138644A1 - 폴리아믹산 조성물, 및 이를 이용한 투명 폴리이미드 필름 - Google Patents
폴리아믹산 조성물, 및 이를 이용한 투명 폴리이미드 필름 Download PDFInfo
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- WO2020138644A1 WO2020138644A1 PCT/KR2019/011467 KR2019011467W WO2020138644A1 WO 2020138644 A1 WO2020138644 A1 WO 2020138644A1 KR 2019011467 W KR2019011467 W KR 2019011467W WO 2020138644 A1 WO2020138644 A1 WO 2020138644A1
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- polyamic acid
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- 0 CN(C(*1(C(N2*)=O)C2=O)=O)C1=O Chemical compound CN(C(*1(C(N2*)=O)C2=O)=O)C1=O 0.000 description 9
- FJXLVGGIMPNVPU-UHFFFAOYSA-N CCCCCC(CCCCN(C(C1C2CCCC1)=O)C2=O)N(C(C1C2CCCCCC1)=O)C2=O Chemical compound CCCCCC(CCCCN(C(C1C2CCCC1)=O)C2=O)N(C(C1C2CCCCCC1)=O)C2=O FJXLVGGIMPNVPU-UHFFFAOYSA-N 0.000 description 1
- YVJSWSCZAGZEQJ-UHFFFAOYSA-N O=C(C1=CC=CC=CC=C11)OC1=O Chemical compound O=C(C1=CC=CC=CC=C11)OC1=O YVJSWSCZAGZEQJ-UHFFFAOYSA-N 0.000 description 1
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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
-
- 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
-
- 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
- C08G73/101—Preparatory processes from tetracarboxylic acids or derivatives and diamines containing chain terminating or branching agents
- C08G73/1014—Preparatory processes from tetracarboxylic acids or derivatives and diamines containing chain terminating or branching agents in the form of (mono)anhydrid
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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
- C08G73/101—Preparatory processes from tetracarboxylic acids or derivatives and diamines containing chain terminating or branching agents
- C08G73/1017—Preparatory processes from tetracarboxylic acids or derivatives and diamines containing chain terminating or branching agents in the form of (mono)amine
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
Definitions
- the present invention relates to a polyamic acid composition
- a polyamic acid composition comprising a terminal monomer having a specific structure, a polyamic acid formed using the polyamic acid composition, and a transparent polyimide film.
- a polyimide (PI) resin generally refers to a high heat-resistant resin produced by solution polymerization of an aromatic dianhydride and an aromatic diamine or an aromatic diisocyanate to produce a polyamic acid derivative, followed by dehydration at a high temperature by dehydration. Since these polyimide resins are insoluble and non-melting ultra-high heat-resistant resins, they have excellent properties such as heat oxidation resistance, heat resistance, radiation resistance, low temperature properties, and chemical resistance, and heat-resistant high-tech materials such as automotive materials, aviation and spacecraft materials, and insulation It is used in a wide range of fields for electronic materials such as coatings, insulating films, semiconductors, and electrode protective films for LCDs.
- the polyimide (PI) resin is colored brown or yellow due to the high aromatic ring density, and thus has low transmittance in the visible region, so it is difficult to use in a field requiring transparency.
- a colorless and transparent polyimide film has been developed.
- the coefficient of thermal expansion (CTE) is higher than that of the existing polyimide resin, and the solvent resistance is deteriorated. Accordingly, when a colorless and transparent polyimide is used for a substrate, an optical coating, and a film, there is a problem in that bending or twisting is likely to occur due to a high coefficient of thermal expansion. Accordingly, in order to be applied as a display material, excellent optical and mechanical properties of the polyimide film must be supported.
- the present invention has been made to solve the above-mentioned problems, and has an object to provide a polyamic acid composition comprising a monomer having a specific chemical structure capable of capping the end of a polyamic acid.
- the present invention is a polyamic acid formed from the polyamic acid composition described above, and a polyamic acid having a capped structure, and imidized using the polyamic acid to provide a transparent polyimide film capable of simultaneously realizing excellent optical and mechanical properties. It aims to provide.
- the present invention is a polyamic acid; And it provides a polyamic acid composition comprising a compound represented by the following formula (1) or (2):
- Rings A and B are the same or different from each other, and each independently C 3 to C 30 monocyclic aliphatic rings, C 3 to C 30 polycyclic aliphatic rings, C 6 to C 30 monocyclic aromatic rings and C 6 to C 30 is selected from the group consisting of polycyclic aromatic rings,
- the monocyclic aliphatic ring, polycyclic aliphatic ring, monocyclic aromatic ring and polycyclic aromatic ring of the rings A and B are in the group consisting of halogen, cyano group, C 1 ⁇ C 10 alkyl group, and C 1 ⁇ C 10 haloalkyl group Substituted or unsubstituted with one or more selected substituents).
- the present invention provides a polyamic acid formed using the polyamic acid composition described above.
- the present invention provides a transparent polyimide film formed by imidizing the aforementioned polyamic acid composition.
- the polyamic acid composition according to the present invention can manufacture a transparent polyimide film having a linear structure having high light transmittance and low yellowness without deteriorating excellent mechanical properties by using a terminal monomer having a specific chemical structure together with the polyamic acid.
- the transparent polyimide film has excellent optical and mechanical properties, and thus can be applied to various fields such as a flexible display substrate, a cover substrate, and a protective film.
- the polyamic acid composition of the present invention is a precursor composition for forming a polyamic acid (specifically, end-capped polyamic acid) for preparing a transparent polyimide film, characterized in that it comprises a compound represented by Formula 1 or 2 do.
- the polyamic acid composition may include (a) polyamic acid (hereinafter referred to as'first polyamic acid'); And (b) a compound represented by Formula 1 or 2.
- the compound represented by Chemical Formula 1 or 2 is a terminal monomer capable of capping at least one of both ends of the first polyamic acid, and a halogen element (F, Cl, Br, I) or cyano group (-CN) or It contains at least one electron withdrawing group (EWG) such as a haloalkyl group (eg, -CF 3 ), an alkyl group, and an aliphatic cyclic compound structure.
- EWG electron withdrawing group
- the polyimide film has a dark brown color, not colorless, because of the charge transfer complex (CTC) of ⁇ electrons present in the imide chain.
- CTC charge transfer complex
- the present invention by including the compound of Formula 1 or 2, as well as to remove the unreacted, it is possible to limit the movement of ⁇ electrons, or inhibit the formation of the resonance structure of ⁇ electrons, deterioration of excellent mechanical properties Without it, a polyimide having high light transmittance and low yellowness can be produced.
- the compound of Formula 1 or 2 includes an electron withdrawing group (EWG) such as a halogen element (F, Cl, Br, I) or cyano group (-CN) or haloalkyl group (eg -CF 3 ) in the molecule.
- EWG electron withdrawing group
- a halogen element F, Cl, Br, I
- -CN cyano group
- haloalkyl group eg -CF 3
- the CT-Complex effect can be suppressed.
- the CT-Complex effect can be suppressed because ⁇ electrons can inhibit the formation of a resonance structure.
- the present invention not only removes unreacted material at the polyamic acid or polyimide ends, but also suppresses the CT-Complex effect, thereby improving the optical properties of the polyimide.
- the polyamic acid composition of the present invention when using a monomer such as phenyl (Phenyl), amide (Amide), cycloaliphatic (Cycloaliphatic), polyamic acid and polyimide having a linear rigid (Rigid) structure Can form. Since these polyamic acids and polyimides are not decomposed by heat or light and are more stable against external impact, they have excellent optical properties, thermal properties, and mechanical properties (Modulus, Strength).
- a monomer such as phenyl (Phenyl), amide (Amide), cycloaliphatic (Cycloaliphatic)
- Polyamic acid and polyimide having a linear rigid (Rigid) structure Can form. Since these polyamic acids and polyimides are not decomposed by heat or light and are more stable against external impact, they have excellent optical properties, thermal properties, and mechanical properties (Modulus, Strength).
- the polyamic acid composition of the present invention forms a polyamic acid and polyimide having a flexible structure with high degrees of freedom when using monomers such as cardo, ether, and sulfone-based monomers. can do.
- monomers such as cardo, ether, and sulfone-based monomers. can do.
- These polyamic acids and polyimides have excellent resilience by high bending properties, and are more stable against folding, and thus have excellent optical properties, thermal properties, and mechanical properties before yield point.
- the polyamic acid composition of the present invention includes a compound represented by Formula 1 or 2.
- the polyamic acid composition of the present invention includes the compound represented by Formula 1 can do.
- the content of the compound represented by Chemical Formula 1 may range from about 0.01 to 10 mol% based on 100 mol% of the total dianhydride.
- the total dianhydride means one or more dianhalide used to form the first polyamic acid.
- the polyamic acid composition of the present invention includes the compound represented by Formula 2 can do.
- the content of the compound represented by Formula 2 may range from about 0.01 to 10 mol% based on 100 mol% of the total diamine.
- the total diamine means one or more diamines used to form the first polyamic acid.
- Rings A and B are the same as or different from each other, and each independently a C 3 ⁇ C 30 monocyclic aliphatic ring, C 3 ⁇ C 30 polycyclic aliphatic ring, C 6 ⁇ C 30 monocyclic aromatic is selected from the ring, and the group consisting of polycyclic aromatic ring of C 6 ⁇ C 30 of, in particular C of 3 ⁇ C 20 monocyclic aliphatic ring, C 3 ⁇ C 20 polycyclic aliphatic ring, C 6 ⁇ C 20 monocyclic aromatic ring and C 6 ⁇ C 20 polycyclic aromatic ring may be selected from the group consisting of.
- each ring in the polycyclic ring may be the same or different from each other.
- the rings A and B are the same or different from each other, and may each independently be a benzene ring or a cyclohexane ring.
- the monocyclic aliphatic ring, polycyclic aliphatic ring, monocyclic aromatic ring, and polycyclic aromatic ring of the rings A and B are each independently halogen, cyano group, C 1 ⁇ C 10 alkyl group, and C 1 ⁇ C 10 haloalkyl group It is substituted or unsubstituted with one or more substituents selected from the group consisting of.
- the monocyclic aliphatic ring, polycyclic aliphatic ring, monocyclic aromatic ring, and polycyclic aromatic ring of rings A and B may each independently be selected from the group consisting of halogen, cyano group, -CH 3 , and -CF 3 .
- any hydrogen of each ring may be substituted with an alkyl group of C 1 to C 10 .
- the compound of Formula 1 or 2 may inhibit the formation of the resonance structure of ⁇ electrons, and thus the CT-Complex (Charge Transfer Complex) effect may be suppressed.
- any hydrogen of each ring may be one or more substituents selected from the group consisting of halogen, cyano group, and C 1 to C 10 haloalkyl group. Can be substituted. In this case, since the compound of Formula 1 or 2 limits the movement of ⁇ electrons, the CT-Complex effect can be suppressed.
- the compound represented by Formula 1 may be embodied as a compound represented by Formula 1a or 1b below, but is not limited thereto.
- a is an integer from 0 to 5
- a when a is 0, it means that hydrogen is not substituted with a substituent R 11 , and when a is an integer from 1 to 5, at least one R 11 is the same or different from each other, and each independently halogen, cyano group, C 1 ⁇ C 10 alkyl, and C 1 ⁇ C 10 of is selected from the group consisting of a haloalkyl group, and preferably may be selected from halogen, a cyano group, and the group consisting of a haloalkyl group of C 1 ⁇ C 10, more preferably F , Cyano group and -CF 3 .
- b is an integer from 0 to 5
- each independently halogen, cyano group, C 1 ⁇ C 10 alkyl group, and C 1 ⁇ C 10 haloalkyl group is selected from the group, preferably selected from the group consisting of C 1 ⁇ C 10 alkyl group, more preferably methyl group (-CH 3 ) Can.
- the compound represented by Formula 1 may be embodied as a compound represented by Formula 1a-1 or 1b-1 below, but is not limited thereto.
- the compound represented by Formula 2 may be embodied as a compound represented by Formula 2a or 2b below, but is not limited thereto.
- c is an integer from 0 to 4,
- each R 13 is the same as or different from each other, and each independently halogen, cyano group, C 1 ⁇ C 10 alkyl, and C 1 ⁇ C 10 of is selected from the group consisting of a haloalkyl group, and preferably may be selected from halogen, a cyano group, and the group consisting of a haloalkyl group of C 1 ⁇ C 10, more preferably F , Cyano group and -CF 3 .
- d is an integer from 0 to 4,
- d when d is 0, it means that hydrogen is not substituted with a substituent R 14 , and when d is an integer of 1 to 4, at least one R 14 is the same as or different from each other, and each independently halogen, cyano group, C 1 ⁇ C 10 alkyl, and C 1 ⁇ is selected from the group consisting of a haloalkyl group of C 10, can be preferably selected from the group consisting of an alkyl group of C 1 ⁇ C 10, it may be more preferably -CH 3.
- the compound represented by Formula 2 may be embodied as a compound represented by Formula 2a-1, 2b-1 or 2b-2 below, but is not limited thereto.
- the polyamic acid composition of the present invention includes a first polyamic acid.
- the first polyamic acid is obtained by performing a solution polymerization reaction of a composition for forming a first polyamic acid comprising at least one diamine and at least one dianhydride, and is present in at least one of both ends of the first polyamic acid. Since the reactant is present, it has reactivity.
- the first polyamic acid may include a repeating unit represented by Formula 3 below.
- Ar 1 is a divalent organic group derived from an alicyclic diamine or aromatic diamine, and a plurality of Ar 1 are the same or different from each other,
- Ar 2 is a tetravalent organic group derived from an alicyclic dianhydride or aromatic dianhydride, and a plurality of Ar 2 are the same or different from each other.
- the first polyamic acid may include a repeating unit represented by the following Chemical Formula 4 or 5.
- Ar 11 to Ar 15 are the same or different from each other, and each independently a divalent organic group derived from an alicyclic diamine or an aromatic diamine,
- Ar 21 to Ar 25 are the same or different from each other, and each independently a tetravalent organic group derived from an alicyclic dianhydride or aromatic dianhydride,
- n1 and n2 are each an integer of 1 or more, specifically an integer of 1 to 10,000, more specifically an integer of 1 to 1,000, provided that n1+n2 ⁇ 1,
- n1 and m2 are each an integer of 1 or more, specifically an integer of 1 to 10,000, more specifically an integer of 1 to 1,000, provided that m1+m2 ⁇ 1.
- Ar 1 , Ar 11 to Ar 15 derived from an alicyclic or aromatic diamine may be more specifically embodied as a moiety represented by the following Chemical Formula A, respectively.
- the ring Cy1 and the ring Cy2 are the same or different from each other, and each independently a C 4 ⁇ C 20 monocyclic aliphatic ring, a C 4 ⁇ C 20 polycyclic aliphatic ring, a C 6 ⁇ C 20 monocyclic aromatic ring and a C 6 ⁇ C 20 is selected from the group consisting of polycyclic aromatic rings,
- the cycloaliphatic ring, aromatic ring of a ring Cy1 and Cy2 are each independently a C 1 ⁇ C 20 alkyl group and C 1 ⁇ substituted or unsubstituted by one or more substituent species selected from the group consisting of a haloalkyl group of C 20 of the ring,
- x is 0 or 1
- W is selected from the group consisting of C 1 ⁇ C 20 alkylene group, C 1 ⁇ C 20 haloalkylene group and -SO 2 -, preferably -(CH 2 )-, -C(CH 3 ) 2 -, -C(CF 3 ) 2 -and -SO 2 -.
- Y may be selected from the group of substituents represented by the following structural formula.
- Ar 2 and Ar 21 to Ar 25 derived from alicyclic or aromatic dianhydrides are each independently a C 4 to C 20 tetravalent monocyclic aliphatic ring group, C 4 to C 20 4 Is selected from the group consisting of polycyclic aliphatic ring groups, C 6 ⁇ C 40 tetravalent monocyclic aromatic ring groups, and C 6 ⁇ 40 monocyclic tetravalent aromatic rings,
- Ar 2 , Ar 21 to Ar 25 are each a plurality of ring groups
- Ar 2 , and Ar 21 to Ar 25 may be each independently selected from the group of substituents represented by the following structural formula.
- the weight average molecular weight of the first polyamic acid according to the present invention may range from about 1,000 to 300,000 g/mol.
- the first polyamic acid is formed of a composition for forming a first polyamic acid comprising at least one diamine and at least one dianhydride.
- the first polyamic acid may be obtained by dissolving one or more diamines in a solvent and then reacting by adding one or more dianhydrides.
- At least one diamine may be used as long as it is a compound having an intramolecular diamine structure, for example, an aromatic, alicyclic, or aliphatic compound having a diamine structure.
- the diamine compound is a non-fluorine aromatic diamine known in the art, a fluorinated aromatic diamine having a fluorine substituent introduced, a sulfone-based diamine, a hydroxy-based diamine, an ether-based diamine, an alicyclic diamine, respectively, or two or more kinds. Can be used interchangeably.
- Non-limiting examples of diamines that can be used include oxydianiline (ODA), 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl (2,2'-TFDB), 2 ,2'-dimethylbenzidine (m-Tolidine), 2,2'-bis(trifluoromethyl)-4,3'- diaminobiphenyl (2,2'-Bis(trifluoromethyl) -4,3'-Diaminobiphenyl ), 2,2'-bis (trifluoromethyl)-5,5'-diaminobiphenyl (2,2'-Bis(trifluoromethyl) -5,5'-Diaminobiphenyl), 2,2'-bis( Trifluoromethyl)-4,4'-diaminophenyl ether (2,2'-Bis (trifluoromethyl)-4,4'-diaminodiphenyl ether, 6-FODA), bis aminohydroxy phenyl hexafluoroprop
- the fluorinated diamine is a 2,2'-bis(trifluoro methyl)-4,4'-diamino ratio capable of inducing linear polymerization.
- Phenyl (2,2'-TFDB) can be used.
- bis(4-aminophenyl)sulfone (4,4'-DDS) can be used as the sulfone-based diamine, and the hydroxy diamine is 2,2-bis (3-amino-4-methylphenyl)-hexafluoro.
- Propane (2,2-Bis (3-amino-4-methylphenyl)-hexafluoropropane, BIS-AT-AF) can be used.
- ether-based diamine 2,2'-bis(trifluoromethyl)-4,4'-diaminophenyl ether (6-FODA) or oxidianiline (ODA) may be used.
- the diamine is 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl (2,2'-TFDB), 2,2'-dimethylbenzidine (m-Tolidine), 2 ,2'-bis(trifluoromethyl)-4,3'-diaminobiphenyl (2,2'-Bis(trifluoromethyl) -4,3'-Diaminobiphenyl), 2,2'-bis (trifluoro Methyl)-5,5'-diaminobiphenyl (2,2'-Bis(trifluoromethyl) -5,5'-Diaminobiphenyl), 2,2'-bis(trifluoromethyl)-4,4'-di It may include one or more selected from the group consisting of aminophenyl ether (2,2'-Bis (trifluoromethyl)-4,4'-diaminodiphenyl ether, 6-FODA).
- At least one dianhydride is a compound having an intramolecular dianhydride structure, and any dianhydride compound generally known in the art may be used without limitation.
- a conventional fluorinated aromatic dianhydride, a non-fluorinated aromatic dianhydride, an alicyclic dianhydride, or the like known in the art may be used alone or in combination of two or more.
- the fluorinated aromatic dianhydride is not particularly limited as long as it is an aromatic dianhydride into which a fluorine-containing substituent (eg, F, -CH 3, etc.) is introduced.
- a fluorine-containing substituent eg, F, -CH 3, etc.
- 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydrid, 6-FDA)
- 4-(tri Fluoromethyl) pyromellitic dianhydride (4-(trifluoromethyl)pyromellitic dianhydride, 4-TFPMDA), and the like.
- 6-FDA is a compound that is very suitable for clarification due to its very large properties that limit the formation of a charge transfer complex (CTC) between molecular chains and within the molecular chain.
- CTC charge transfer complex
- the non-fluorinated dianhydride is not particularly limited as long as it is an aromatic dianhydride to which no fluorine substituent is introduced.
- PMDA Pyromellitic Dianhydride
- BPDA 3,3',4,4'-biphenyltetracarboxylic dianhydride
- BPADA 4,4'-Bisphenol A dianhydride
- BTDA benzophenone tetracarboxylic dianhydride
- ODPA oxydiphthalic dianhydride
- the alicyclic dianhydride is not particularly limited as long as it is a compound having an dianhydride structure while having an aliphatic ring rather than an aromatic ring in the compound.
- CBDA cyclobutane tetracarboxylic dianhydride
- CPDA 1,2,3,4-cyclopentane tetracarboxylic dianhydride
- BCDA bicyclo[2,2,2]-7- Octene-2,3,5,6-tetracarboxylic dianhydride
- BCDA bicyclo[2,2,2]-7- Octene-2,3,5,6-tetracarboxylic dianhydride
- the dianhydride is pyromellitic dianhydride (PMDA), biphenyltetracarboxylic dianhydride (BPDA), 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dian Hydride (2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydrid, 6-FDA), 4,4'-Bisphenol A dianhydride (BPADA), 4-(Tri Fluoromethyl)pyromellitic dianhydride (4-TFPMDA), cyclobutane tetracarboxylic dianhydride (CBDA), 1,2,3,4-cyclopentane tetracarboxyl Rick dianhydride (CPDA), and bicyclo[2,2,2]-7-octene-2,3,5,6-tetracarboxylic dianhydride (BCDA).
- PMDA pyromellitic dianhydride
- BPDA biphenyltetracar
- the ratio (b/a) of the number of moles (b) of dianhydride to the number of moles (a) of the diamine may range from 0.7 to 1.3, preferably 0.8 to 1.2, and more preferably in the range of 0.9 to 1.1.
- the polyamic acid composition of the present invention may include a compound represented by Formula 1 above.
- the content of the compound represented by Chemical Formula 1 may range from about 0.01 to 10 mol% based on 100 mol% of the total dianhydride.
- the polyamic acid composition of the present invention may include a compound represented by Formula 2 above.
- the content of the compound represented by Formula 2 may range from about 0.01 to 10 mol% based on 100 mol% of the total diamine.
- the composition for forming the first polyamic acid may include a solvent for solution polymerization of the aforementioned monomers.
- organic solvents known in the art can be used without limitation, for example, m-cresol, N-methyl-2-pyrrolidone (NMP), dimethylformamide (DMF), dimethyl Acetamide (DMAc), dimethyl sulfoxide (DMSO), acetone, diethyl acetate, and dimethyl phthalate (DMP). These may be used alone or in combination of two or more.
- NMP N-methyl-2-pyrrolidone
- DMF dimethylformamide
- DMAc dimethyl Acetamide
- DMSO dimethyl sulfoxide
- acetone diethyl acetate
- DMP dimethyl phthalate
- the content of the solvent is not particularly limited, and may be a residual amount that controls the total amount of the composition for forming the first polyamic acid to be 100% by weight.
- the content of the solvent in order to obtain the molecular weight and viscosity of the composition for forming a suitable first polyamic acid, is about 50 to 95% by weight based on the total amount of the composition for forming the first polyamic acid, specifically about 70 to It may be 90% by weight.
- the total content of one or more diamines and one or more dianhydrides may be about 5 to 50% by weight, specifically about 10 to 30% by weight.
- the composition of the composition for forming the first polyamic acid is not particularly limited, and for example, based on 100% by weight of the total weight of the first polyamic acid composition, 2.5 to 25.0% by weight of one or more diamines; About 2.5 to 25.0 weight percent of one or more dianhydrides; And a residual amount of an organic solvent satisfying 100% by weight of the composition.
- the composition for forming the first polyamic acid of the present invention when it is based on 100% by weight of solids, it may range from about 30 to 70% by weight of one or more dianhydrides, and from 30 to 70% by weight of one or more diamines. , It is not particularly limited.
- the composition for forming a first polyamic acid constituted as described above may have a viscosity in a range of about 1,000 to 400,000 cps, specifically about 5,000 to 100,000 cps.
- the viscosity of the composition for forming the first polyamic acid falls within the above-described range, the thickness of the polyamic acid composition of the present invention can be easily adjusted and the coating surface can be uniformly exhibited.
- composition for forming the first polyamic acid described above may further include at least one additive known in the art within a range not significantly impairing the objects and effects of the present invention, if necessary.
- additives include plasticizers, antioxidants, flame retardants, dispersants, viscosity modifiers, leveling agents, and the like.
- the additive may be added by appropriately adjusting within the range of the amount used in the art.
- the polyamic acid composition of the present invention uses the composition for forming the first polyamic acid to form a first polyamic acid having at least one of both terminals having reactivity, and then formula (1) in a solution containing the first polyamic acid. Or it can be obtained by adding the compound of 2.
- the polyamic acid composition includes a first polyamic acid and a compound of Formula 1 above.
- the first polyamic acid includes at least one diamine component and at least one dianhydride, but comprises diamine (a) and dianhydride (b) at a molar ratio of greater than about 1:1 to less than 1.3. It is formed of a composition for forming a polyamic acid, and contains an anhydride moiety at both ends.
- the polyamic acid composition of the present invention can improve optical properties while maintaining excellent mechanical properties.
- the polyamic acid composition includes a first polyamic acid, and a compound of Formula 2 above.
- the first polyamic acid includes one or more diamine components and one or more dianhydrides, but includes diamine (a) and dianhydride (b) in a ratio of about 0.7 or more to less than 1: 1 molar. It is formed of a composition for forming a polyamic acid, and contains amine moieties at both ends.
- the polyamic acid composition of the present invention can improve optical properties while maintaining excellent mechanical properties.
- the polyamic acid composition configured as described above may have a viscosity in the range of about 1,000 to 500,000 cps, preferably about 5,000 to 100,000 cps.
- the polyamic acid composition of the present invention is easy to control the thickness when coating, and the coating surface can be exhibited uniformly.
- the present invention provides a polyamic acid formed from the polyamic acid composition described above.
- the polyamic acid of the present invention is that at least one reactivity of both ends is terminated. Therefore, the polyamic acid of the present invention can obtain a transparent polyimide having excellent mechanical properties and optical properties during the imide ring closure reaction and having a linear structure.
- the polyamic acid is represented by the following formula 6 or 7.
- PAA is a polyamic acid (hereinafter referred to as'first polyamic acid') or a derivative thereof derived from a solution polymerization reaction of one or more diamines with one or more dianhydrides,
- a plurality of rings A are the same or different from each other,
- a plurality of rings B are the same as or different from each other,
- Rings A and B are as defined in Formulas 1 and 2.
- the PAA may be a polyamic acid-derived group represented by Chemical Formulas 8 or 9, but is not limited thereto.
- Ar 11 to Ar 15 are the same or different from each other, and each independently a divalent organic group derived from an alicyclic diamine or an aromatic diamine,
- Ar 21 to Ar 25 are the same or different from each other, and each independently a tetravalent organic group derived from an alicyclic dianhydride or aromatic dianhydride,
- n1 and n2 are each an integer of 1 or more, specifically an integer of 1 to 10,000, more specifically an integer of 1 to 1,000, provided that n1+n2 ⁇ 1,
- n1 and m2 are each an integer of 1 or more, specifically an integer of 1 to 10,000, more specifically an integer of 1 to 1,000, provided that m1+m2 ⁇ 1.
- the polyamic acid may be embodied as a polyamic acid represented by any one of the following Chemical Formulas 10 to 13, but is not limited thereto.
- Ar 11 to Ar 15 are the same or different from each other, and each independently a divalent organic group derived from an alicyclic diamine or an aromatic diamine,
- Ar 21 to Ar 25 are the same or different from each other, and each independently a tetravalent organic group derived from an alicyclic dianhydride or aromatic dianhydride,
- n1 and n2 are each an integer of 1 or more, specifically an integer of 1 to 10,000, more specifically an integer of 1 to 1,000, provided that n1+n2 ⁇ 1,
- n1 and m2 are each or more integers, specifically 1 to 10,000 integers, and more specifically 1 to 1,000 integers, provided that m1+m2 ⁇ 1,
- a and b are each an integer from 0 to 5
- c and d are each an integer from 0 to 4
- R 11 to R 14 are the same as or different from each other, and each independently selected from the group consisting of halogen, cyano group, C 1 to C 10 alkyl group, and C 1 to C 10 haloalkyl group.
- the present invention provides a transparent polyimide film prepared by imidizing the above-described polyamic acid composition.
- the transparent polyimide has at least one of the reactivity of both ends terminated, excellent in mechanical properties and optical properties, it is possible to obtain a transparent polyimide having a linear structure.
- the polyimide of the transparent polyimide film is represented by the following formula 14 or 15.
- PI is a polyimide derived group formed by imidizing a polyamic acid or a derivative thereof derived from the reaction of diamine and dianhydride,
- a plurality of rings A are the same or different from each other,
- a plurality of rings B are the same as or different from each other,
- Rings A and B are as defined in Formulas 1 and 2, respectively.
- PI is a polymer site containing an imide ring, and may be in the form of a common random copolymer or block copolymer known in the art.
- the PI may be a polyimide-derived group represented by the following formulas 16 or 17, but is not limited thereto.
- Ar 11 to Ar 15 are the same or different from each other, and each independently a divalent organic group derived from an alicyclic diamine or an aromatic diamine,
- Ar 21 to Ar 25 are the same or different from each other, and each independently a tetravalent organic group derived from an alicyclic dianhydride or aromatic dianhydride,
- n1 and n2 are each an integer of 1 or more, specifically an integer of 1 to 10,000, more specifically an integer of 1 to 1,000, provided that n1+n2 ⁇ 1,
- n1 and m2 are each an integer of 1 or more, specifically an integer of 1 to 10,000, more specifically an integer of 1 to 1,000, provided that m1+m2 ⁇ 1.
- the polyimide may be embodied as a polyimide represented by any one of the following Chemical Formulas 18 to 21, but is not limited thereto.
- Ar 11 to Ar 15 are the same or different from each other, and each independently a divalent organic group derived from an alicyclic diamine or an aromatic diamine,
- Ar 21 to Ar 25 are the same or different from each other, and each independently a tetravalent organic group derived from an alicyclic dianhydride or aromatic dianhydride,
- n1 and n2 are each an integer of 1 or more, specifically an integer of 1 to 10,000, more specifically an integer of 1 to 1,000, provided that n1+n2 ⁇ 1,
- n1 and m2 are each an integer of 1 or more, specifically an integer of 1 to 10,000, more specifically an integer of 1 to 1,000, provided that m1+m2 ⁇ 1,
- a and b are each an integer from 0 to 5
- c and d are each an integer from 0 to 4
- R 11 to R 14 are the same as or different from each other, and each independently selected from the group consisting of halogen, cyano group, C 1 to C 10 alkyl group, and C 1 to C 10 haloalkyl group.
- the structural formulas of the polyamic acid and the polyimide resin using the same are exemplified by the above-described formulas 6 to 21 and are specifically described.
- the polyimide film according to the present invention may be prepared by polymerizing a transparent polyamic acid composition (eg, a polyamic acid-containing solution) in an exothermic solution according to a conventional method known in the art.
- a transparent polyamic acid composition eg, a polyamic acid-containing solution
- the temperature may be gradually increased in the range of about 30 to 350°C while inducing imidazation for about 0.5 to 8 hours. At this time, it is preferable to react under an inert atmosphere such as argon or nitrogen.
- the coating method may be used without limitation, a conventional method known in the art, for example, spin coating, dip coating, solvent casting, slot die coating, and It may be made by at least one method selected from the group consisting of spray coating.
- the colorless transparent polyimide layer may be coated with the transparent polyamic acid composition one or more times so that the thickness becomes several tens of ⁇ m at several hundred nm.
- the imidization method applied to the step of imidizing the polymerized polyamic acid by casting it on a support is a thermal imidization method, a chemical imidization method, or a thermal imidization method and a chemical
- the imidization method can be used in combination.
- the thermal imidization method is a method of casting a polyamic acid composition on a support and heating it slowly in a temperature range of 30 to 400°C while heating for 1 to 10 hours to obtain a polyimide film.
- the chemical imidization method is a method of introducing a dehydrating agent represented by an acid anhydride such as acetic anhydride and an imidization catalyst represented by amines such as isoquinoline, ⁇ -picoline and pyridine into the polyamic acid composition.
- a dehydrating agent represented by an acid anhydride such as acetic anhydride
- an imidization catalyst represented by amines such as isoquinoline, ⁇ -picoline and pyridine
- the heating conditions of the polyamic acid composition may be varied depending on the type of the polyamic acid composition, the thickness of the polyimide film to be produced, and the like.
- a dehydrating agent and an imidation catalyst are added to the polyamic acid composition, cast onto a support, and then cast at 80 to 300°C , Preferably by heating at 150 to 250° C. to activate the dehydrating agent and the imidation catalyst, and then partially cured and dried to obtain a polyimide film.
- the thickness of the polyimide film formed in this way is not particularly limited, and may be appropriately adjusted according to the applied field. For example, it may be in the range of about 10 to 150 ⁇ m, preferably about 10 to 80 ⁇ m.
- the transparent polyimide resin film according to the present invention may be applied to various fields, and specifically, may be used for a substrate such as a flexible display or a protective film.
- a substrate such as a flexible display or a protective film.
- it should basically have high transparency, low yellowness, and excellent mechanical characteristics at the same time.
- the light transmittance of 550 nm is 10% or more at a film thickness of 10 ⁇ m
- the yellowness value of 550 nm is 7 or less. Is required.
- an adhesive force is required in which the polyimide on the support (glass substrate) does not peel off the glass substrate during the process.
- the polyimide film of the present invention prepared by imidizing a polyamic acid composition may have high yellowness, high tensile strength, and elastic modulus simultaneously while exhibiting high transparency. More specifically, the polyimide film has physical properties of (i) to (iv) below, such as (i) a light transmittance of wavelength 550 nm of about 88% or more, and (ii) yellowness according to ASTM E313 standard (Yellow Index) is about 3.5 or less, (iii) the tensile strength according to the ISO 527-3 standard is about 100 MPa or more, and (iv) the elastic modulus is about 3.5 GPa or more.
- the polyimide film has physical properties of (i) to (iv) below, such as (i) a light transmittance of wavelength 550 nm of about 88% or more, and (ii) yellowness according to ASTM E313 standard (Yellow Index) is about 3.5 or less, (iii) the tensile strength according to the
- the transparent polyimide film of the present invention having the above-described physical properties can be particularly usefully applied to fields where high transparency and mechanical properties are required.
- a display for an organic EL device (OLED) a display for a liquid crystal device, a TFT substrate, a flexible printed circuit board, a flexible OLED surface lighting substrate, a substrate for a flexible display such as a substrate material for electronic paper, a cover It can be used as a substrate and/or a protective film.
- OLED organic EL device
- TFT substrate a display for a liquid crystal device
- TFT substrate a TFT substrate
- a flexible printed circuit board a flexible OLED surface lighting substrate
- a substrate for a flexible display such as a substrate material for electronic paper
- a cover It can be used as a substrate and/or a protective film.
- Example 1-1 After coating the transparent polyamic acid composition obtained in Example 1-1 on a glass plate for LCD using a bar coater, in a nitrogen atmosphere convection oven at 80°C for 30 minutes, at 150°C for 30 minutes, at 200°C A transparent polyimide film (imidation rate: 85% or more, film thickness: 52 ⁇ m) was prepared by gradually drying the mixture gradually at 1 hour at 300° C. for 1 hour, and then drying and imidazation. Then, the polyimide film was separated from the glass plate and taken.
- a transparent polyimide film (imidation rate: 85% or more, film thickness: 52 ⁇ m) was prepared by gradually drying the mixture gradually at 1 hour at 300° C. for 1 hour, and then drying and imidazation. Then, the polyimide film was separated from the glass plate and taken.
- a colorless and transparent polyimide film was prepared in the same manner as in Example 1-2, except that the polyamic acid composition obtained in Example 2-1 was used instead of the polyamic acid composition used in Example 1-2.
- a colorless transparent polyimide film was prepared in the same manner as in Example 1-2, except that the polyamic acid composition obtained in Comparative Example 1-1 was used instead of the polyamic acid composition used in Example 1-2.
- Cyclobutane-1,2,3,4-tetracarboxylic dianhydride (CBDA) 5.249 g (60 mol%) and 2,2-bis (3,4- dicarboxyphenyl) Hexafluoropropane dianhydride (6FDA) 7.729 g (39 mol%) were added to the reactor. Each was sequentially added and reacted. After 1 hour, 0.15 g (1 mol%) of the compound of Formula 2b-2 was added to the reactor, and then cooled to 30° C. to dissolve.
- CBDA Cyclobutane-1,2,3,4-tetracarboxylic dianhydride
- 6FDA 2,2-bis (3,4- dicarboxyphenyl) Hexafluoropropane dianhydride
- a colorless and transparent polyimide film was prepared in the same manner as in Example 1-2, except that the polyamic acid composition obtained in Example 3-1 was used instead of the polyamic acid composition used in Example 1-2.
- a colorless transparent polyimide film was prepared in the same manner as in Example 1-2, except that the polyamic acid composition obtained in Example 4-1 was used instead of the polyamic acid composition used in Example 1-2.
- a colorless transparent polyimide film was prepared in the same manner as in Example 1-2, except that the polyamic acid composition obtained in Comparative Example 2-1 was used instead of the polyamic acid composition used in Example 1-2.
- a colorless and transparent polyimide film was prepared in the same manner as in Example 1-2, except that the polyamic acid composition obtained in Example 5-1 was used instead of the polyamic acid composition used in Example 1-2.
- a colorless and transparent polyimide film was prepared in the same manner as in Example 1-2, except that the polyamic acid composition obtained in Example 6-1 was used instead of the polyamic acid composition used in Example 1-2.
- a colorless and transparent polyimide film was prepared in the same manner as in Example 1-2, except that the polyamic acid composition obtained in Comparative Example 3-1 was used instead of the polyamic acid composition used in Example 1-2.
- a colorless transparent polyimide film was prepared in the same manner as in Example 1-2, except that the polyamic acid composition obtained in Example 7-1 was used instead of the polyamic acid composition used in Example 1-2.
- a colorless and transparent polyimide film was prepared in the same manner as in Example 1-2, except that the polyamic acid composition obtained in Example 8-1 was used instead of the polyamic acid composition used in Example 1-2.
- a colorless and transparent polyimide film was prepared in the same manner as in Example 1-2, except that the polyamic acid composition obtained in Comparative Example 4-1 was used instead of the polyamic acid composition used in Example 1-2.
- compositions of the polyamic acid compositions prepared in Examples 1 to 8 and Comparative Examples 1 to 4 herein are as described in Tables 1 and 2 below.
- the content unit of each monomer is mol%
- the diamine monomer is based on the total number of moles of the entire diamine
- the dianhydride monomer is based on the total number of moles of the entire dianhydride
- the terminal monomer is diamine or dian It is based on 100 mol% of the total number of moles of hydride.
- Example 1 TFDB(100) Formula 2b-2(1) BPDA(80) ODPA(19)
- Example 2 TFDB(100) Formula 2b-2(3) BPDA(80) ODPA(17)
- Example 3 6FODA(100) Formula 2b-2(1) CBDA(60) 6FDA(39)
- Example 4 6FODA(100) Formula 2b-2(3) CBDA(60) 6FDA(37) Comparative Example 1 TFDB(100) - BPDA(80) ODPA(20) Comparative Example 2 6FODA(100) - CBDA(60) 6FDA(40)
- UV-Vis NIR Spectrophotometer Shiadzu, model name: UV-3150
- the yellowness was measured by ASTM E313 standard using a spectrophotometer (Konica Minolta, model name: CM-3700d).
- Example 1 88 3.2 4.7 146
- Example 2 89 3.1 4.7 146
- Example 3 89 3.3 4.2 136
- Example 4 90 3.0 4.2 136
- Example 5 89.5 2.7 3.6 119
- Example 6 90.5 2.4 3.6 119
- Example 7 89 3.3 3.7 124
- Example 8 90 3.2 3.7 124 Comparative Example 1 86 3.7 3.4 98 Comparative Example 2 87 3.6 3.3 97 Comparative Example 3 86.5 3.7 3.2 93 Comparative Example 4 87 3.8 3.1 94
- the colorless and transparent polyimide film of the present invention in which the compound of Formula 1 or 2 is included as a terminal monomer maintains the same elastic modulus and tensile strength as the polyimide films of Comparative Examples 1 to 4 containing no terminal monomer. While, it was found that the light transmittance and yellowness were superior to those of the polyimide films of Comparative Examples 1 to 4 (see Table 3). Specifically, in the present invention, yellowness and light transmittance increased without deterioration of elastic modulus and tensile strength according to the content of the terminal monomers of Formula 1 or 2. In particular, the light transmittance increased about 2% and the yellowness decreased about 15% compared to the polyimide film containing no terminal monomer.
- the polyamic acid composition of the present invention was confirmed to be applicable to a flexible display (Flexible Display) substrate and a protective film.
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Abstract
Description
| 구분 | 디아민(mol%) | 말단 모노머(mol%) | 디안하이드라이드(mol%) | |
| 실시예 1 | TFDB(100) | 화학식 2b-2(1) | BPDA(80) | ODPA(19) |
| 실시예 2 | TFDB(100) | 화학식 2b-2(3) | BPDA(80) | ODPA(17) |
| 실시예 3 | 6FODA(100) | 화학식 2b-2(1) | CBDA(60) | 6FDA(39) |
| 실시예 4 | 6FODA(100) | 화학식 2b-2(3) | CBDA(60) | 6FDA(37) |
| 비교예 1 | TFDB(100) | - | BPDA(80) | ODPA(20) |
| 비교예 2 | 6FODA(100) | - | CBDA(60) | 6FDA(40) |
| 구분 | 디아민(mol%) | 말단 모노머(mol%) | 디안하이드라이드(mol%) | |
| 실시예 5 | TFDB(60) | 6FODA(39) | 화학식 1a-1(1) | BPADA(100) |
| 실시예 6 | TFDB(60) | 6FODA((37) | 화학식 1a-1(3) | BPADA(100) |
| 실시예 7 | m-Tolidin(40) | 6FODA(59) | 화학식 1a-1(1) | 6FDA(100) |
| 실시예 8 | m-Tolidin(40) | 6FODA(57) | 화학식 1a-1(3) | 6FDA(100) |
| 비교예 3 | TFDB(60) | 6FODA(40) | - | BPADA(100) |
| 비교예 4 | m-Tolidin(40) | 6FODA(60) | - | 6FDA(100) |
| 구분 | 투과도(%) | 황색도 | 탄성율(Gpa) | 인장강도(Mpa) |
| 실시예 1 | 88 | 3.2 | 4.7 | 146 |
| 실시예 2 | 89 | 3.1 | 4.7 | 146 |
| 실시예 3 | 89 | 3.3 | 4.2 | 136 |
| 실시예 4 | 90 | 3.0 | 4.2 | 136 |
| 실시예 5 | 89.5 | 2.7 | 3.6 | 119 |
| 실시예 6 | 90.5 | 2.4 | 3.6 | 119 |
| 실시예 7 | 89 | 3.3 | 3.7 | 124 |
| 실시예 8 | 90 | 3.2 | 3.7 | 124 |
| 비교예 1 | 86 | 3.7 | 3.4 | 98 |
| 비교예 2 | 87 | 3.6 | 3.3 | 97 |
| 비교예 3 | 86.5 | 3.7 | 3.2 | 93 |
| 비교예 4 | 87 | 3.8 | 3.1 | 94 |
Claims (22)
- 폴리아믹산; 및하기 화학식 1 또는 2로 표시되는 화합물을 포함하는 폴리아믹산 조성물:[화학식 1][화학식 2](상기 화학식 1 및 2에서,고리 A 및 B는 서로 동일하거나 상이하고, 각각 독립적으로 C3~C30의 단일환 지방족고리, C3~C30의 다환 지방족고리, C6~C30의 단일환 방향족고리 및 C6~C30의 다환 방향족고리로 이루어진 군에서 선택되고,상기 고리 A 및 B의 단일환 지방족고리, 다환 지방족고리, 단일환 방향족고리 및 다환방향족고리는 할로겐, 시아노기, C1~C10의 알킬기, 및 C1~C10의 할로알킬기로 이루어진 군에서 선택된 1종 이상의 치환기로 치환 또는 비치환됨).
- 제1항에 있어서,상기 폴리아믹산은 1종 이상의 디아민 및 1종 이상의 디안하이드라이드를 반응시켜 형성된 것인, 폴리아믹산 조성물.
- 제4항에 있어서,상기 디아민의 몰수(a)에 대한 디안하이드라이드의 몰수(b)의 비율(b/a)은 0.7 내지 1.3 범위인 폴리아믹산 조성물.
- 제4항에 있어서,상기 디아민의 몰수(a)에 비해 디안하이드라이드의 몰수(b)의 비율(b/a)은 1.0 초과 내지 1.3 이하인, 폴리아믹산 조성물.
- 제6항에 있어서,상기 폴리아믹산 조성물은 상기 화학식 1로 표시되는 화합물을 포함하는 폴리아믹산 조성물.
- 제7항에 있어서,상기 화학식 1로 표시되는 화합물의 함량은 전체 디안하이드라이드 100 몰%를 기준으로 0.01 내지 10 몰% 범위인 폴리아믹산 조성물.
- 제4항에 있어서,상기 디아민의 몰수(a)에 대한 디안하이드라이드의 몰수(b)의 비율(b/a)은 0.7 이상 내지 1.0 미만인 폴리아믹산 조성물.
- 제9항에 있어서,상기 폴리아믹산 조성물은 상기 화학식 2로 표시되는 화합물을 포함하는 폴리아믹산 조성물.
- 제10항에 있어서,상기 화학식 2로 표시되는 화합물의 함량은 전체 디아민 100 몰%를 기준으로 0.01 내지 10 몰% 범위인 폴리아믹산 조성물.
- 상기 폴리아믹산은 하기 화학식 4 또는 5로 표시되는 반복단위를 포함하는, 폴리아믹산 조성물:[화학식 4][화학식 5](상기 화학식 4 및 5에서,Ar11 내지 Ar15는 서로 동일하거나 상이하고, 각각 독립적으로 지환족 디아민 또는 방향족 디아민으로부터 유도된 2가의 유기기이며,Ar21 내지 Ar25는 서로 동일하거나 상이하고, 각각 독립적으로 지환족 디안하이드라이드 또는 방향족 디안하이드라이드로부터 유도된 4가의 유기기이며,n1 및 n2는 각각 1 이상의 정수이고, 단 n1+n2≥1이며,m1 및 m2는 각각 1 이상의 정수이고, 단 m1+m2≥1임).
- 제14항에 있어서,상기 PAA는 하기 화학식 8 또는 9로 표시되는 반복단위를 포함하는 것인, 폴리아믹산:[화학식 8][화학식 9](상기 화학식 8 및 9에서,Ar11 내지 Ar15는 서로 동일하거나 상이하고, 각각 독립적으로 지환족 디아민 또는 방향족 디아민으로부터 유도된 2가의 유기기이며,Ar21 내지 Ar25는 서로 동일하거나 상이하고, 각각 독립적으로 지환족 디안하이드라이드 또는 방향족 디안하이드라이드로부터 유도된 4가의 유기기이며,n1 및 n2는 각각 1 이상의 정수이고, 단 n1+n2≥1이며,m1 및 m2는 각각 1 이상의 정수이고, 단 m1+m2≥1임).
- 제14항에 있어서,상기 화학식 6 또는 7로 표시되는 폴리아믹산은 하기 화학식 10 내지 13 중 어느 하나로 표시되는 폴리아믹산:[화학식 10][화학식 11][화학식 12][화학식 13](화학식 10 내지 13에서,Ar11 내지 Ar15는 서로 동일하거나 상이하고, 각각 독립적으로 지환족 디아민 또는 방향족 디아민으로부터 유도된 2가의 유기기이며,Ar21 내지 Ar25는 서로 동일하거나 상이하고, 각각 독립적으로 지환족 디안하이드라이드 또는 방향족 디안하이드라이드로부터 유도된 4가의 유기기이며,n1 및 n2는 각각 1 이상의 정수이고, 단 n1+n2≥1이며,m1 및 m2는 각각 1 이상의 정수이고, 단 m1+m2≥1이며,a 및 b는 각각 0 내지 5의 정수이고, c 및 d는 각각 0 내지 4의 정수이며,R11 내지 R14는 서로 동일하거나 상이하고, 각각 독립적으로 할로겐, 시아노기, C1~C10의 알킬기, 및 C1~C10의 할로알킬기로 이루어진 군에서 선택된 것임).
- 제1항 내지 제13항 중 어느 한 항에 기재된 폴리아믹산 조성물을 이미드화하여 형성된 투명 폴리이미드 필름:
- 제18항에 있어서,상기 PI는 하기 화학식 16 또는 17로 표시되는 폴리이미드 유래기인, 투명 폴리이미드 필름:[화학식 16][화학식 17](상기 화학식 16 및 17에서,Ar11 내지 Ar15는 서로 동일하거나 상이하고, 각각 독립적으로 지환족 디아민 또는 방향족 디아민으로부터 유도된 2가의 유기기이며,Ar21 내지 Ar25는 서로 동일하거나 상이하고, 각각 독립적으로 지환족 디안하이드라이드 또는 방향족 디안하이드라이드로부터 유도된 4가의 유기기이며,n1 및 n2는 각각 1 이상의 정수이고, 단 n1+n2≥1이며,m1 및 m2는 각각 1 이상의 정수이고, 단 m1+m2≥1임).
- 제18항에 있어서,상기 폴리이미드는 하기 화학식 18 내지 21 중 어느 하나로 표시되는 고분자인, 투명 폴리이미드 필름:[화학식 18][화학식 19][화학식 20][화학식 21](화학식 18 내지 21에서,Ar11 내지 Ar15는 서로 동일하거나 상이하고, 각각 독립적으로 지환족 디아민 또는 방향족 디아민으로부터 유도된 2가의 유기기이며,Ar21 내지 Ar25는 서로 동일하거나 상이하고, 각각 독립적으로 지환족 디안하이드라이드 또는 방향족 디안하이드라이드로부터 유도된 4가의 유기기이며,n1 및 n2는 각각 1 이상의 정수이고, 단 n1+n2≥1이며,m1 및 m2는 각각 1 이상의 정수이고, 단 m1+m2≥1이며,a 및 b는 각각 0 내지 5의 정수이고, c 및 d는 각각 0 내지 4의 정수이며,R11 내지 R14는 서로 동일하거나 상이하고, 각각 독립적으로 할로겐, 시아노기, C1~C10의 알킬기, 및 C1~C10의 할로알킬기로 이루어진 군에서 선택된 것임).
- 제17항에 있어서,하기 (i) 내지 (iv)의 물성 조건을 만족하는 투명 폴리이미드 필름:(i) 파장 550 nm의 광선 투과율이 88 % 이상이며,(ii) ASTM E313 규격에 의한 황색도(Yellow Index)가 3.5 이하이며,(iii) ISO 527-3 규격에 의한 인장강도가 100 MPa 이상이며,(iv) 탄성율이 3.5 GPa 이상임.
- 제17항에 있어서,플렉서블 디스플레이용 기판 또는 보호막으로 사용되는 투명 폴리이미드 필름.
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