WO2016060213A1 - ポリイミド樹脂組成物、ポリイミドフィルム及び積層体 - Google Patents
ポリイミド樹脂組成物、ポリイミドフィルム及び積層体 Download PDFInfo
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- WO2016060213A1 WO2016060213A1 PCT/JP2015/079227 JP2015079227W WO2016060213A1 WO 2016060213 A1 WO2016060213 A1 WO 2016060213A1 JP 2015079227 W JP2015079227 W JP 2015079227W WO 2016060213 A1 WO2016060213 A1 WO 2016060213A1
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- WIPO (PCT)
- Prior art keywords
- polyimide resin
- polyimide
- film
- solution
- resin composition
- Prior art date
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- 229920001721 polyimide Polymers 0.000 title claims abstract description 237
- 239000009719 polyimide resin Substances 0.000 title claims abstract description 161
- 239000000203 mixture Substances 0.000 title claims abstract description 61
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000010419 fine particle Substances 0.000 claims abstract description 34
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 34
- 239000011521 glass Substances 0.000 claims description 24
- 239000000758 substrate Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000011888 foil Substances 0.000 claims description 5
- 239000002985 plastic film Substances 0.000 claims description 5
- 229920006255 plastic film Polymers 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 238000005452 bending Methods 0.000 abstract description 8
- 239000010408 film Substances 0.000 description 56
- 238000000034 method Methods 0.000 description 42
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 34
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 33
- 238000006243 chemical reaction Methods 0.000 description 32
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 30
- -1 alicyclic diamine Chemical class 0.000 description 30
- NVKGJHAQGWCWDI-UHFFFAOYSA-N 4-[4-amino-2-(trifluoromethyl)phenyl]-3-(trifluoromethyl)aniline Chemical compound FC(F)(F)C1=CC(N)=CC=C1C1=CC=C(N)C=C1C(F)(F)F NVKGJHAQGWCWDI-UHFFFAOYSA-N 0.000 description 27
- 239000002114 nanocomposite Substances 0.000 description 25
- 239000003960 organic solvent Substances 0.000 description 24
- 239000004642 Polyimide Substances 0.000 description 23
- 239000002904 solvent Substances 0.000 description 22
- QYIMZXITLDTULQ-UHFFFAOYSA-N 4-(4-amino-2-methylphenyl)-3-methylaniline Chemical compound CC1=CC(N)=CC=C1C1=CC=C(N)C=C1C QYIMZXITLDTULQ-UHFFFAOYSA-N 0.000 description 20
- 239000003054 catalyst Substances 0.000 description 20
- 238000011156 evaluation Methods 0.000 description 20
- 239000007789 gas Substances 0.000 description 20
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 18
- 238000003756 stirring Methods 0.000 description 18
- LJMPOXUWPWEILS-UHFFFAOYSA-N 3a,4,4a,7a,8,8a-hexahydrofuro[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1C2C(=O)OC(=O)C2CC2C(=O)OC(=O)C21 LJMPOXUWPWEILS-UHFFFAOYSA-N 0.000 description 17
- 239000007787 solid Substances 0.000 description 17
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 16
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 15
- 238000002834 transmittance Methods 0.000 description 14
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 13
- 150000004985 diamines Chemical class 0.000 description 13
- 239000012299 nitrogen atmosphere Substances 0.000 description 13
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 12
- 150000004984 aromatic diamines Chemical class 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 11
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- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 10
- 230000008034 disappearance Effects 0.000 description 10
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 9
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 9
- 125000002723 alicyclic group Chemical group 0.000 description 8
- 125000003118 aryl group Chemical group 0.000 description 8
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 8
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- 239000000126 substance Substances 0.000 description 8
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- 239000002253 acid Substances 0.000 description 7
- 125000003277 amino group Chemical group 0.000 description 7
- 150000000000 tetracarboxylic acids Chemical class 0.000 description 7
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
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- 239000006087 Silane Coupling Agent Substances 0.000 description 6
- 125000001931 aliphatic group Chemical group 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
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- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
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- KRPRVQWGKLEFKN-UHFFFAOYSA-N 3-(3-aminopropoxy)propan-1-amine Chemical compound NCCCOCCCN KRPRVQWGKLEFKN-UHFFFAOYSA-N 0.000 description 4
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- ZPAKUZKMGJJMAA-UHFFFAOYSA-N Cyclohexane-1,2,4,5-tetracarboxylic acid Chemical group OC(=O)C1CC(C(O)=O)C(C(O)=O)CC1C(O)=O ZPAKUZKMGJJMAA-UHFFFAOYSA-N 0.000 description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000004305 biphenyl Substances 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 4
- KZTYYGOKRVBIMI-UHFFFAOYSA-N diphenyl sulfone Chemical compound C=1C=CC=CC=1S(=O)(=O)C1=CC=CC=C1 KZTYYGOKRVBIMI-UHFFFAOYSA-N 0.000 description 4
- 239000002612 dispersion medium Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 125000000524 functional group Chemical group 0.000 description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 4
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- KMKWGXGSGPYISJ-UHFFFAOYSA-N 4-[4-[2-[4-(4-aminophenoxy)phenyl]propan-2-yl]phenoxy]aniline Chemical compound C=1C=C(OC=2C=CC(N)=CC=2)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=C(N)C=C1 KMKWGXGSGPYISJ-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
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- 229910052802 copper Inorganic materials 0.000 description 3
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- 239000006185 dispersion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
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- 239000012788 optical film Substances 0.000 description 3
- ZQBAKBUEJOMQEX-UHFFFAOYSA-N phenyl salicylate Chemical class OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 description 3
- 229920005575 poly(amic acid) Polymers 0.000 description 3
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- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 3
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- QEGNUYASOUJEHD-UHFFFAOYSA-N 1,1-dimethylcyclohexane Chemical compound CC1(C)CCCCC1 QEGNUYASOUJEHD-UHFFFAOYSA-N 0.000 description 2
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
-
- 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 polyimide resin composition, an optical film comprising the polyimide resin composition, and a laminate.
- the optical film is processed into a flexible display front plate, an organic EL material, an IR cut filter, and the like.
- polyimide is heat-resistant to solder reflow and can be made soluble in a solvent.
- the wholly aromatic polyimide turns yellow due to the formation of a charge transfer complex within and between molecules. Therefore, transparency can be exhibited by using fluorine-introduced polyimide, alicyclic diamine, or alicyclic acid dianhydride. Moreover, it is known that solvent solubility is expressed by using an alicyclic material, and has advantages in terms of ease of processing and storage stability of a resin solution (see Patent Document 1).
- 1,2,4,5 in the main chain of heat-meltable obtained from 1,2,4,5-cyclohexanetetracarboxylic dianhydride, which is an alicyclic acid dianhydride, and its reactive derivative -A polyimide resin containing a cyclohexanetetracarboxylic acid skeleton is disclosed (see Patent Document 2).
- 1,2,4,5-cyclohexanetetracarboxylic dianhydride and its reactive derivative are reacted with diaminodiphenylmethane to form amic acid, which is coated on a substrate such as glass and then heated.
- a transparent yellow polyimide resin film having a glass transition temperature of 304 ° C. obtained by imidization and further heat-press molding is disclosed.
- a film having a glass transition temperature of 400 ° C. or higher and a total light transmittance of 80% can be produced by reacting 1,2,4,5-cyclohexanetetracarboxylic dianhydride and m-tolidine. (See Patent Document 3).
- Polyimide resin having a 1,2,4,5-cyclohexanetetracarboxylic acid skeleton is relatively easy to obtain high molecular weight, and it is easy to obtain a flexible film, and the solubility in a solvent is sufficiently high. This is advantageous (see Patent Document 4).
- the polyimide and polyimide film thus produced are excellent in heat resistance and transparency, but the mechanical strength (elastic modulus) and surface hardness are not necessarily sufficient for the use of the flexible display front plate.
- a method for improving the surface hardness a method of applying a hard coat agent and a method of adding an inorganic filler are known. However, even if the surface hardness is improved, the bending resistance may be deteriorated, and it is difficult to combine mechanical strength, surface hardness, and bending resistance.
- the problem to be solved by the present invention is a polyimide resin composition capable of forming a film having mechanical strength, surface hardness, and bending resistance, which cannot be achieved by the prior art in addition to heat resistance and transparency. It is in providing a polyimide resin, a polyimide film, and a laminated body.
- a polyimide resin composed of a specific repeating unit has good storage stability in solvents, heat resistance, transparency, and affinity with silica fine particles. It has been found that a polyimide resin composition containing can form a film and a laminate excellent in surface hardness, mechanical strength and bending resistance. Based on these findings, the present invention has been achieved. That is, the present invention relates to the following 1 to 7. 1.
- a polyimide film comprising the polyimide resin composition according to 1 or 2 above. 4). 4. The polyimide film as described in 3 above, wherein a hard coat layer is formed on at least one surface. 5.
- At least one substrate selected from plastic film, silicon wafer, metal foil and glass, and a polyimide resin layer formed on the at least one surface of the substrate using the polyimide resin composition described in 1 or 2 above A laminate having 6). It is a polyimide resin containing the repeating unit represented by the formula (1) and the formula (2), and the formula (2) with respect to the total amount of the repeating unit represented by the formula (1) and the formula (2). A polyimide resin, wherein the proportion of repeating units represented is 20 to 60 mol%. 7). 7. A polyimide film in which a hard coat layer is formed on at least one surface of a polyimide film made of the polyimide resin as described in 6 above.
- the present invention provides a polyimide resin composition, a polyimide resin, a polyimide film, and a laminate capable of forming a film having mechanical strength, surface hardness and bending resistance in addition to heat resistance and transparency.
- the polyimide resin composition of the present invention contains the polyimide resin of the present invention and silica fine particles.
- the polyimide resin of the present invention contains repeating units represented by the following formula (1) and the following formula (2), and the following formula with respect to the total amount of the repeating units represented by the following formula (1) and the following formula (2).
- the ratio of the repeating unit represented by (2) is 20 to 60 mol%.
- the repeating unit represented by the formula (1) preferably has a skeleton derived from 1,2,4,5-cyclohexanetetracarboxylic dianhydride and a skeleton derived from 2,2′-dimethylbenzidine (m-tolidine).
- the repeating unit represented by the formula (2) preferably has a skeleton derived from 1,2,4,5-cyclohexanetetracarboxylic dianhydride and a skeleton derived from 2,2′-bis (trifluoromethyl) benzidine.
- the ratio of the repeating unit represented by formula (2) to the total amount of the repeating units represented by formula (1) and formula (2) is 20 to 60 mol% from the viewpoint of mechanical strength, surface hardness and transparency. It is preferably 30 to 50 mol%.
- the polyimide resin of the present invention may contain a repeating unit represented by the following formula (3) as a repeating unit other than the repeating units represented by the formulas (1) and (2) in all the structural units.
- R 1 is a divalent group derived from an aromatic diamine other than 2,2′-dimethylbenzidine or 2,2′-bis (trifluoromethyl) benzidine, an aliphatic diamine. It is a divalent group derived from a divalent group or a divalent group derived from an alicyclic diamine.
- a divalent group derived from an aromatic diamine other than 2,2'-dimethylbenzidine and 2,2'-bis (trifluoromethyl) benzidine is a divalent aromatic group having 2 to 39 carbon atoms or a combination thereof. Any divalent group may be used.
- the main chain of the aromatic diamine includes —O—, —SO 2 —, —CH 2 —, —C (CH 3 ) 2 —, —OSi (CH 3 ) 2 —, —C 2 H 4 O— and It may have at least one functional group selected from the group consisting of —S—, and may have at least one functional group selected from the group consisting of a carboxyl group, a hydroxyl group and a carbonyl group.
- the aromatic diamine is a divalent aliphatic group such as polyalkylene, polyoxyalkylene, xylylene and their alkyl-substituted, halogen-substituted, carboxy-substituted, and hydroxy-substituted groups; cyclohexane, dicyclohexyl Divalent alicyclic groups derived from methane, dimethylcyclohexane, isophorone, norbornane and their alkyl, halogen, carboxy and hydroxy substituents; and benzene, naphthalene, biphenyl, diphenylmethane, diphenyl ether , Diphenylsulfone, benzophenone and those containing a divalent aromatic group derived from an alkyl-substituted product, a halogen-substituted product, a carboxy-substituted product, a hydroxy-substituted product, or the like
- divalent group derived from the aromatic diamine examples include 1,4-phenylenediamine, 1,3-phenylenediamine, 2,4-toluenediamine, 4,4′-diaminodiphenyl ether, and 3,4 ′.
- divalent group derived from the aliphatic diamine examples include ethylene diamine, hexamethylene diamine, polyethylene glycol bis (3-aminopropyl) ether, polypropylene glycol bis (3-aminopropyl) ether, and 1,3-bis.
- divalent group derived from the alicyclic diamine examples include a divalent group derived from 4,4′-diaminodicyclohexylmethane, isophoronediamine, and norbornanediamine.
- the proportion of the total of the repeating units represented by the formula (1) and the formula (2) in all the structural units of the polyimide resin is preferably 80 to 100 mol%, more preferably 90 to 100 mol%, and more preferably 95 to 100 mol % Is more preferable.
- the polyimide resin can be produced by a solution polymerization method, a method of preparing a polyamic acid solution and then imidizing it by forming a film. Moreover, you may use a catalyst at the time of manufacture.
- polyimide resin is used as a polyimide solution, it is desirable that the molecular weight be expressed in terms of viscosity, particularly logarithmic viscosity.
- the logarithmic viscosity n (measured at 30 ° C. using a 0.5 g / dL N-methyl-2-pyrrolidone solution) of the polyimide resin is preferably 0.3 dL / g to 2.0 dL / g. If the logarithmic viscosity is less than 0.3 dL / g, the strength of the polyimide resin itself becomes weak.
- the logarithmic viscosity exceeds 2 dL / g, the fluidity of the solution is extremely deteriorated, so that stirring at the time of polymerization is difficult and handling becomes difficult.
- the logarithmic viscosity is more preferably 0.3 to 1.5 dL / g, and further preferably 1.0 to 1.5 dL / g.
- the polyimide resin is obtained by reacting the diamine component (Z) and the tetracarboxylic acid component (Y).
- Examples of the tetracarboxylic acid component (Y) include 1,2,4,5-cyclohexanetetracarboxylic acid, 1,2,4,5-cyclohexanetetracarboxylic dianhydride, 1,2,4,5-cyclohexanetetracarboxylic Examples include acid esters.
- Examples of the 1,2,4,5-cyclohexanetetracarboxylic acid ester include dimethyl 1,2,4,5-cyclohexanetetracarboxylate and diethyl 1,2,4,5-cyclohexanetetracarboxylate. Isomers of these compounds may be included. Among these, 1,2,4,5-cyclohexanetetracarboxylic dianhydride is preferable.
- the diamine component (Z) contains 2,2'-dimethylbenzidine and 2,2'-bis (trifluoromethyl) benzidine as main components.
- the proportion of the total of 2,2′-dimethylbenzidine and 2,2′-bis (trifluoromethyl) benzidine in the diamine component (Z) is preferably 80 to 100 mol%, more preferably 90 to 100 mol%. 95 to 100 mol% is more preferable.
- the diamine component (Z) may contain aromatic diamines, aliphatic diamines, and alicyclic diamines other than 2,2'-dimethylbenzidine and 2,2'-bis (trifluoromethyl) benzidine.
- aromatic diamine means a diamine in which an amino group is directly bonded to an aromatic ring, and an aliphatic group, an alicyclic group, an aromatic group, other It may contain a substituent.
- “Aliphatic diamine” refers to a diamine in which an amino group is directly bonded to an aliphatic group, and the structure includes an aliphatic group, an alicyclic group, an aromatic group, and other substituents.
- Alicyclic diamine refers to a diamine in which an amino group is directly bonded to an alicyclic group, and an aliphatic group, an alicyclic group, an aromatic group, and other substituents are partly included in the structure. It may contain and may have at least one functional group selected from the group consisting of a carboxyl group, a hydroxyl group and a carbonyl group.
- 2,2′-bis [4- (4-aminophenoxy) phenyl] propane is an aromatic diamine because the amino group is directly bonded to the aromatic ring (benzene ring)
- m-xylylenediamine Is an aliphatic diamine because the amino group is directly bonded to an aliphatic group (methylene group).
- aromatic diamine other than 2,2′-dimethylbenzidine and 2,2′-bis (trifluoromethyl) benzidine examples include 1,4-phenylenediamine, 1,3-phenylenediamine, and 2,4- Toluenediamine, 4,4′-diaminodiphenyl ether, 3,4′-diaminodiphenyl ether, 4,4′-diaminodiphenylmethane, 1,4-bis (4-aminophenoxy) benzene, 1,3-bis (4-aminophenoxy) ) Benzene, 1,3-bis (3-aminophenoxy) benzene, ⁇ , ⁇ '-bis (4-aminophenyl) -1,4-diisopropylbenzene, ⁇ , ⁇ '-bis (3-aminophenyl) -1 , 4-diisopropylbenzene, 2,2-bis [4- (4-aminophenoxy) phenyl] propane, 4,4
- Examples of the aliphatic diamine include ethylene diamine, hexamethylene diamine, polyethylene glycol bis (3-aminopropyl) ether, polypropylene glycol bis (3-aminopropyl) ether, 1,3-bis (aminomethyl) cyclohexane, 1, Examples include 4-bis (aminomethyl) cyclohexane, p-xylylenediamine, m-xylylenediamine, and siloxane diamines.
- alicyclic diamine examples include 4,4'-diaminodicyclohexylmethane, isophorone diamine, and norbornane diamine.
- the diamine component (Z) is selected from the aliphatic diamines, aromatic diamines, and alicyclic diamines exemplified above in addition to 2,2′-dimethylbenzidine and 2,2′-bis (trifluoromethyl) benzidine. At least one compound may be included, and a plurality of compounds may be included.
- a method for producing a polyimide resin (1) a solution polymerization method, (2) a method of preparing a polyamic acid solution, forming a film and imidizing it, (3) 1,2,4,5-cyclohexanetetracarboxylic A salt or imide oligomer such as a half ester salt of an acid dianhydride is obtained and subjected to solid phase polymerization, (4) a method of reacting a tetracarboxylic dianhydride and a diisocyanate, or other conventionally known methods. it can. You may use each method together.
- the reaction between the tetracarboxylic acid component (Y) and the diamine component (Z) may be carried out in the presence of a conventionally known catalyst such as an acid, a tertiary amine or an anhydride.
- the organic solvent used when producing the polyimide resin is preferably a diamine, tetracarboxylic dianhydride, polyamic acid, or a specific organic solvent that is soluble in polyimide.
- organic solvents include m-cresol, p-chlorophenol, dimethyl sulfoxide, N, N-dimethylacetamide, N, N-dimethylformamide, diethylene glycol monomethyl ether, N-methylpyrrolidone, ⁇ -butyrolactone, and the like.
- N, N-dimethylacetamide, N, N-dimethylformamide, and ⁇ -butyrolactone are preferably used as the organic solvent.
- the above compounds can be used alone or in admixture of two or more.
- the organic solvent is used in such an amount that the concentration of the polyimide resin is preferably 1 to 50% by mass, more preferably 5 to 40% by mass.
- a poor solvent such as hexane, heptane, benzene, toluene, xylene, chlorobenzene, or o-dichlorobenzene can be used together with the organic solvent to the extent that the polymer does not precipitate.
- the polyimide resin may contain an organic solvent used during production.
- a solution polymerization method is preferred because a solution of the polyimide resin can be obtained directly.
- the solution polymerization method preferably has the following steps (I) to (III).
- a catalyst can be used for solution polymerization for producing a polyimide resin.
- the catalyst that can be used in the solution polymerization include trimethylamine, triethylamine, tripropylamine, tributylamine, triethanolamine, N, N-dimethylethanolamine, N, N-diethylethanolamine, triethylenediamine, N-methylpyrrolidine, Examples include at least one catalyst selected from tertiary amine compounds such as N-ethylpyrrolidine, N-methylpiperidine, N-ethylpiperidine, imidazole, pyridine, quinoline, and isoquinoline.
- the amount used is preferably 0.1 to 100 mol%, more preferably 1 to 50 mol%, based on the tetracarboxylic acid component (Y).
- the tetracarboxylic acid component (Y) is preferably from 0.66 mol to 1.5 mol, more preferably from 0.9 to 1.1 mol, even more preferably from 1 mol of the diamine component (Z). Is produced by reacting 0.97 to 1.03 moles.
- the method for isolating the polyimide resin from the polyimide resin solution obtained by the above solution polymerization method is not particularly limited as long as it does not denature the polyimide resin.
- a method of dropping a polyimide resin solution into a poor solvent (2) a method of dropping the poor solvent while stirring the polyimide resin solution, and (3) high speed by spraying the polyimide resin solution at a high temperature
- the poor solvent is not particularly limited as long as it is not soluble in the polyimide resin, and examples thereof include water, methanol, ethanol, 1-propanol, 2-propanol, metaxylene, paraxylene, mixed xylene, toluene, and acetone. .
- the poor solvent may be used alone or in combination of two or more.
- the polyimide resin of the present invention Even if the polyimide resin of the present invention is used alone, a polyimide film excellent in terms of heat resistance and tensile elastic modulus can be obtained, but the polyimide resin composition of the present invention further includes silica fine particles, A polyimide film having a further improved tensile elastic modulus can be obtained.
- the silica used for the silica fine particles is silicon dioxide (SiO 2 ), and the form (crystalline form, amorphous form, etc.) is not limited.
- the shape of the silica fine particles is not particularly limited, and examples thereof include a spherical shape, an elliptical shape, a flat shape, a rod shape, and a fiber shape.
- the silica fine particles used in the present invention preferably have a small particle diameter from the viewpoint of maintaining high light transmittance in the polyimide resin composition and the polyimide film, and the average particle diameter is preferably 1 to 100 nm, more preferably The range is 1 to 50 nm, more preferably 5 to 25 nm.
- the average particle diameter of the silica fine particles can be measured by, for example, the BET method.
- the silica fine particles may be surface-treated with a surface treatment agent such as a silane coupling agent from the viewpoint of dispersibility in the polyimide resin solution.
- a surface treatment agent such as a silane coupling agent
- Amino group containing silane coupling agent is preferable from an affinity viewpoint with a polyimide resin.
- amino group-containing silane coupling agents include 3- (2-aminoethylamino) propyldimethoxymethylsilane, 3- (2-aminoethylamino) propyltrimethoxysilane, and 3- (2-aminoethylamino) propyl.
- the surface treatment method of the silica fine particles with the silane coupling agent is not particularly limited, and a known method can be used. For example, it can be carried out by preparing a dispersion in which silica fine particles are dispersed in an organic solvent and the like, adding the above-mentioned silane coupling agent thereto, and stirring for several hours at a temperature of about room temperature to 80 ° C. . At this time, a small amount of water may be added to accelerate the treatment reaction.
- the ratio of the silica fine particles to the total amount of the polyimide resin and the silica fine particles in the polyimide resin composition of the present invention is preferably 1 to 80% by mass, more preferably 30 to 75% by mass, It is more preferably 35 to 60% by mass, still more preferably 40 to 60% by mass, still more preferably 40 to 55% by mass, and still more preferably 40 to 50% by mass. . If the ratio of the silica fine particles to the total amount of the polyimide resin and silica fine particles in the polyimide resin composition is in the above range, the flexibility of the polyimide film obtained using the polyimide resin composition is good, and the heat resistance Excellent in surface hardness and tensile elastic modulus.
- the polyimide resin composition of the present invention may contain additives other than the polyimide resin and silica fine particles as long as the effects of the present invention are not impaired.
- the additive include compounds such as organic solvents, antioxidants, light stabilizers, surfactants, flame retardants, plasticizers, polyimide resins other than the polyimide resins, polyamide resins, and polyamideimide resins.
- organic solvent the compound illustrated above as an organic solvent used at the time of manufacture of a polyimide resin, the diluent added for the purpose of controlling the solid content concentration in the dispersion medium of a silica fine particle mentioned later, or a polyimide resin composition And the preferred examples are the same.
- Preparation method of polyimide resin composition There is no restriction
- a suitable example for preparing the polyimide resin composition of the present invention is a method of mixing and preparing a polyimide resin solution and an organosilica sol.
- the organosilica sol refers to a dispersion medium in which silica fine particles are dispersed at a ratio of about 20% by mass.
- the dispersion medium of the silica fine particles is preferably a good solvent for the polyimide resin, and N-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, ⁇ -butyrolactone, propylene glycol monomethyl ether, Examples include cyclopentanone, cyclohexanone, ethyl acetate, toluene, methyl ethyl ketone, ethylene glycol, isopropanol, and methanol.
- N-methyl-2-pyrrolidone N, N-dimethylformamide, N, N-dimethylacetamide, ⁇ -butyrolactone, propylene glycol monomethyl ether, cyclopentanone, cyclohexanone, ethyl acetate, and toluene are preferable.
- the solid content concentration of the polyimide resin composition of the present invention can be appropriately selected according to workability when forming a polyimide film or a laminate described later, and is condensed by volatilizing or diluting the organic solvent. You may adjust the solid content density
- the solid content concentration of the polyimide resin composition is preferably 5 to 60% by mass, more preferably 10 to 45% by mass.
- the viscosity of the polyimide resin composition is preferably 1 to 200 Pa ⁇ s, more preferably 5 to 150 Pa ⁇ s.
- the diluent is not particularly limited as long as it can dissolve the polyimide resin, and examples thereof include the compounds exemplified as the dispersion medium of the silica fine particles, and preferable ones are also the same.
- the present invention provides a polyimide film comprising the polyimide resin composition.
- the present invention also provides a polyimide film in which a hard coat layer is formed on at least one surface of the polyimide film made of the polyimide resin.
- the polyimide film made of the polyimide resin composition may be referred to as a polyimide-nanocomposite film.
- the polyimide film of the present invention is obtained by applying (casting) a solution containing a polyimide resin or the polyimide resin composition containing an organic solvent onto a smooth support such as a glass plate, a metal plate, or a plastic, and heating it to obtain a solvent component. Can be produced by evaporation.
- the solution containing the polyimide resin can be obtained by dissolving the polyimide resin in a solvent.
- the solvent is not particularly limited as long as it can dissolve the polyimide resin, but m-cresol, p-chlorophenol, dimethyl sulfoxide, N-methyl-2-pyrrolidone, N, N-dimethylacetamide, N, Examples thereof include N-dimethylformamide, diethylene glycol monomethyl ether, N-methylpyrrolidone, ⁇ -butyrolactone, methanol, isopropanol, ethylene glycol, methyl ethyl ketone, propylene glycol monomethyl ether, cyclopentanone, cyclohexanone, ethyl acetate, toluene and the like.
- the solution containing the polyimide resin may be a polyimide resin solution itself obtained by a polymerization method. Moreover, what mixed at least 1 sort (s) chosen from the compound illustrated above as a solvent which a polyimide resin melt
- s at least 1 sort
- a release agent may be applied to the surface of the support.
- the following method is preferred as a method of heating the solvent to evaporate the solvent component after applying the solution containing the polyimide resin or the polyimide resin composition containing an organic solvent to the support. That is, after evaporating the solvent at a temperature of 120 ° C. or less to form a self-supporting film, the self-supporting film is peeled off from the support, the ends of the self-supporting film are fixed, and the solvent component used It is preferable to produce a polyimide film by drying at a temperature not lower than the boiling point and not higher than 350 ° C. Moreover, it is preferable to dry in nitrogen atmosphere. The pressure in the dry atmosphere may be any of reduced pressure, normal pressure, and increased pressure.
- the thickness of the polyimide film is preferably 1 to 200 ⁇ m, more preferably 1 to 100 ⁇ m, still more preferably 20 to 80 ⁇ m.
- the polyimide film comprising the polyimide resin composition of the present invention may be provided with a hard coat layer on at least one surface.
- the polyimide film made of the polyimide resin of the present invention has a hard coat layer formed on at least one surface thereof.
- the hard coat layer may be formed on all or a part of at least one surface of the polyimide fill.
- the thickness of the hard coat layer is preferably 1 to 30 ⁇ m and more preferably 5 to 20 ⁇ m from the viewpoint of improving the film surface hardness and achieving high transparency.
- a method of providing a hard coat layer on the surface of the polyimide film a known method can be used. For example, a method of coating a film containing a hard coat agent on the surface of the polyimide film and then drying it can be mentioned.
- Examples of the solution containing a hard coat agent include compounds that form a crosslinked structure such as acrylic, urethane, epoxy, or silicon.
- acrylic, urethane, and epoxy compounds are preferable because they have a high effect of improving film surface hardness and are excellent in wear resistance and transparency.
- a method for coating and forming a solution containing a hard coating agent on the surface of the polyimide film known methods such as spin coater, bar coater, gravure coater, dipping, spraying and the like can be used.
- a known technique such as ultraviolet curing, thermal curing, or electron beam curing can be used.
- the solution containing the hard coat agent contains at least one selected from an ultraviolet absorber, a light stabilizer, an antioxidant, an antistatic agent, a leveling agent, an antifoaming agent, a thickener, an antifogging agent, and an organic solvent. But you can.
- the ultraviolet absorber conventionally known compounds can be used, and examples thereof include benzotriazole compounds, benzophenone compounds, salicylic acid phenyl ester compounds, triazine compounds, and the like.
- the benzotriazole ultraviolet absorber include 2- (5-methyl-2-hydroxyphenyl) benzotriazole, 2- (2'-hydroxy-5'-t-octylphenyl) benzotriazole and the like.
- the benzophenone ultraviolet absorber include 2-hydroxy-4-octoxybenzophenone, 2,4-dihydroxybenzophenone, 2,2-dihydroxy-4-methoxybenzophenone, and the like.
- Examples of the salicylic acid phenyl ester ultraviolet absorber include pt-butylphenyl salicylic acid ester.
- Examples of triazine ultraviolet absorbers include 2,4-diphenyl-6- (2-hydroxy-4-ethoxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2-hydroxy-4- And methoxyphenyl) -1,3,5-triazine.
- Other examples of the ultraviolet absorber include 2-ethylhexyl-2-cyano-3,3'-diphenyl acrylate.
- the present invention includes at least one substrate selected from a plastic film, a silicon wafer, a metal foil, and glass and a polyimide resin layer formed using a polyimide resin composition provided on at least one surface of the substrate.
- a laminate having the same is provided.
- the laminated body of this invention should just have at least 1 said polyimide layer, and may have two or more.
- the polyimide resin layer provided on at least one surface of the substrate is formed using the polyimide resin composition of the present invention.
- the thickness of the polyimide resin layer can be appropriately selected depending on the use of the laminate, but is preferably 0.5 to 50 ⁇ m, more preferably 1 to 10 ⁇ m.
- the polyimide resin layer is within the range not impairing the effects of the present invention, in addition to titanium oxide fine particles, zirconia fine particles, gold nano fine particles, niobium oxide, alumina fine particles, etc., polyesters such as polycarbonate, polystyrene, polyamide, polyethylene terephthalate, polyethers A sulfone, polycarboxylic acid, polyacetal, polyphenylene ether, polysulfone, polybutylene, polypropylene, polyacrylamide, polyvinyl chloride and the like may be included.
- polyesters such as polycarbonate, polystyrene, polyamide, polyethylene terephthalate, polyethers
- the base material used for the laminate of the present invention is selected from a plastic film, a silicon wafer, a metal foil, and glass.
- the resin constituting the plastic film include polyolefins such as homopolymers or copolymers such as ethylene, propylene and isobutene, amorphous polyolefins such as cyclic polyolefins, polyethylene terephthalate, polyethylene-2,6-naphthalate and the like.
- Polyester nylon 6, nylon 66, nylon 12, polyamide such as copolymer nylon, polyvinyl alcohol, ethylene-vinyl acetate copolymer partial hydrolyzate (EVOH), polyimide, polyetherimide, polysulfone, polyethersulfone, poly Examples thereof include biodegradable resins such as ether ether ketone, polycarbonate, polyarylate, fluororesin, acrylic resin, and polylactic acid.
- biodegradable resins such as ether ether ketone, polycarbonate, polyarylate, fluororesin, acrylic resin, and polylactic acid.
- polyethylene-2,6-naphthalate, polyimide, polyetherimide, polysulfone, polyethersulfone, and polycarbonate are preferable from the viewpoints of heat resistance and dimensional stability.
- the thickness of the substrate can be appropriately selected according to the use of the laminate, but is preferably in the range of 0.1 to 500 ⁇ m, more preferably 1 to 250 ⁇ m.
- the present invention will be specifically described below with reference to examples. However, the present invention is not limited to these examples.
- the physical properties of the films (polyimide film, polyimide-nanocomposite film, hard coat laminated film) obtained in the following examples were measured by the following methods.
- Example 1 2,2'-dimethylbenzidine (in a 2 L 5-neck glass round bottom flask equipped with a stainless steel half-moon stirrer, a nitrogen inlet tube, a Dean Stark fitted with a cooling tube, a thermometer, and a glass end cap.
- the resulting polyimide resin was derived from 2,2′-dimethylbenzidine-derived structural units and 2,2′-bis (trifluoromethyl) benzidine.
- the ratio of the structural unit derived from 2,2′-bis (trifluoromethyl) benzidine to the total of the structural units was 20 mol%. Further, disappearance of the raw material peak and the appearance of a peak derived from the imide skeleton were confirmed by FT-IR.
- the obtained polyimide resin solution (a) is applied on a glass substrate, and after evaporating the solvent under conditions of 60 ° C. for 30 minutes and 100 ° C. for 1 hour to form a self-supporting film, the self-supporting film is formed on the glass substrate.
- the film edge was fixed, and the solvent was removed by drying for 2 hours in a nitrogen atmosphere at 280 ° C. to obtain a polyimide film having a thickness of 65 ⁇ m.
- the polyimide film has a tensile modulus of 3.4 GPa, a tensile strength of 121.2 MPa, a surface hardness of ⁇ 6B, a total light transmittance of 90.3%, a YI value of 1.5, and an evaluation of flex resistance of A.
- Polyimide resin solution (a) 50.0 g and colloidal silica dispersion (“DMAC-ST”, Nissan Chemical Industries, Ltd., silica content 20 mass%, average particle diameter 11 nm, N, N-dimethylacetamide solution) 40 g was stirred at 2000 rpm for 2 minutes with a rotation and revolution mixer (manufactured by Shinky Co., Ltd., ARE-250) to obtain a polyimide-nanosilica composite solution.
- the solution was applied onto a glass substrate, and after evaporating the solvent under conditions of 60 ° C. for 30 minutes and 100 ° C.
- Example 2 2,2'-Dimethylbenzidine (Wakayama Sei) in a 300 mL five-neck glass round bottom flask equipped with a stainless steel half-moon stirring blade, a nitrogen inlet tube, a Dean Stark fitted with a cooling tube, a thermometer, and a glass end cap 12.634 g (0.060 mol) 2,2′-bis (trifluoromethyl) benzidine (manufactured by Wakayama Seika Kogyo Co., Ltd.) 12.706 g (0.040 mol), ⁇ - 46.518 g of butyrolactone (manufactured by Mitsubishi Chemical Corporation) and 5.018 g of triethylamine (manufactured by Kanto Chemical Co., Ltd.) as a catalyst were stirred at 200 rpm in a reaction system temperature of 70 ° C.
- a polyimide resin solution (b) having a solid content concentration of 20 mass% and a logarithmic viscosity of 1.3 dL / g ) The structural unit derived from 2,2′-dimethylbenzidine and the structural unit derived from 2,2′-bis (trifluoromethyl) benzidine in the obtained polyimide resin as a result of analysis by the same method as in Example 1.
- the ratio of the structural unit derived from 2,2′-bis (trifluoromethyl) benzidine to the total of was 40 mol%. Further, disappearance of the raw material peak and the appearance of a peak derived from the imide skeleton were confirmed by FT-IR.
- a polyimide film having a thickness of 62 ⁇ m was obtained in the same manner as in Example 1 except that the polyimide resin solution (b) was used.
- the polyimide film had a tensile modulus of 3.6 GPa, a surface hardness of ⁇ 6B, a total light transmittance of 90.3%, a YI value of 1.8, and an evaluation of flex resistance of A.
- a 45 ⁇ m-thick polyimide-nanocomposite film B was obtained in the same manner as in Example 1 except that the polyimide resin solution (b) was used.
- the evaluation results of the polyimide-nanocomposite film B are shown in Table 1.
- Example 3 In a five-neck glass round bottom flask similar to that used in Example 2, 2,32′-dimethylbenzidine (Wakayama Seika Kogyo Co., Ltd.) 8.032 g (0.038 mol), 2,2 '-Bis (trifluoromethyl) benzidine (Wakayama Seika Kogyo Co., Ltd.) 18.174 g (0.057 mol), ⁇ -butyrolactone (Mitsubishi Chemical Co., Ltd.) 46.355 g, and triethylamine (Kanto) as the catalyst (Chemical Co., Ltd.) 4.786 g was stirred at 200 rpm in a nitrogen atmosphere at a reaction system internal temperature of 70 ° C.
- a polyimide film having a thickness of 64 ⁇ m was obtained in the same manner as in Example 1 except that the polyimide resin solution (c) was used.
- the polyimide film has a tensile modulus of 3.1 GPa, a tensile strength of 132.1 MPa, a surface hardness of ⁇ 6B, a total light transmittance of 90.7%, a YI value of 1.8, and an evaluation of flex resistance of A. there were.
- a polyimide-nanocomposite film C having a thickness of 56 ⁇ m was obtained in the same manner as in Example 1 except that the polyimide resin solution (c) was used.
- the evaluation results of the polyimide-nanocomposite film C are shown in Table 1.
- Example 4 In a five-neck glass round-bottom flask similar to that used in Example 2, 2,278′-dimethylbenzidine (manufactured by Wakayama Seika Kogyo Co., Ltd.) 10.278 g (0.048 mol), 2,2 '-Bis (trifluoromethyl) benzidine (Wakayama Seika Kogyo Co., Ltd.) 15.505 g (0.048 mol), ⁇ -butyrolactone (Mitsubishi Chemical Co., Ltd.) 46.435 g, and triethylamine (Kanto) as the catalyst (Chemical Co., Ltd.) 4.899 g was stirred at 200 rpm in a nitrogen atmosphere at a reaction system internal temperature of 70 ° C.
- N, N-dimethylacetamide was added and stirred at about 100 ° C. for about 3 hours to obtain a uniform solution.
- a polyimide resin solution having a solid content concentration of 20% by mass and a logarithmic viscosity of 1.2 dL / g (d ) The structural unit derived from 2,2′-dimethylbenzidine and the structural unit derived from 2,2′-bis (trifluoromethyl) benzidine in the obtained polyimide resin as a result of analysis by the same method as in Example 1.
- the ratio of the structural unit derived from 2,2′-bis (trifluoromethyl) benzidine to the total of was 50 mol%.
- a polyimide film having a thickness of 55 ⁇ m was obtained in the same manner as in Example 1 except that the polyimide resin solution (d) was used.
- This polyimide has a tensile modulus of 3.3 GPa, a tensile strength of 114.7 MPa, a surface hardness of ⁇ 6B, a total light transmittance of 90.4%, a YI value of 1.8, and an evaluation of flex resistance of A. It was.
- a 45- ⁇ m polyimide-nanocomposite film D was obtained in the same manner as in Example 1 except that the polyimide resin solution (d) was used. The evaluation results of the polyimide-nanocomposite film D are shown in Table 1.
- Example 5 An appropriate amount of the hard coat solution prepared in the previous paragraph was dropped onto a polyimide film having a thickness of 60 ⁇ m obtained using the polyimide resin solution (a) in the same manner as in Example 1, and a film was formed using a bar coater # 8. .
- the film-forming film is allowed to stand for 2 minutes in a hot air dryer preheated to a temperature of 80 ° C. to volatilize excess organic solvent, and then using a high-pressure mercury lamp with an output density of 80 W / cm, at a position 10 cm below the light source. It was cured by irradiating with ultraviolet rays at a conveyor speed of 3.0 m / min.
- the hard coat laminated film E whose film thickness of a hard-coat layer is 6.5 micrometers was obtained.
- the evaluation results of the hard coat laminated film E are shown in Table 1.
- Example 6 A hard coat solution was formed in the same manner as in Example 5 except that a 57 ⁇ m thick polyimide-nanocomposite film obtained in the same manner as in Example 1 was used, and a hard coat laminated film F was obtained.
- the evaluation results of the hard coat laminated film F are shown in Table 1.
- a 48 ⁇ m thick polyimide film was obtained in the same manner as in Example 1 except that the polyimide resin solution (e) was used.
- This polyimide film has a tensile modulus of 2.8 GPa, a tensile strength of 107.5 MPa, a surface hardness of ⁇ 6B, a total light transmittance of 90.4%, a YI value of 2.2, and an evaluation of flex resistance of A. there were.
- a 53 ⁇ m polyimide-nanocomposite film G was obtained in the same manner as in Example 1 except that the polyimide resin solution (e) was used. The evaluation results of the polyimide-nanocomposite film G are shown in Table 1.
- This polyimide resin film had a tensile modulus of 2.9 GPa, a tensile strength of 121.9 MPa, a surface hardness of ⁇ 6B, a total light transmittance of 90.9%, a YI value of 2.0, and a flex resistance of A. It was.
- a polyimide nanocomposite film H having a thickness of 48 ⁇ m was obtained in the same manner as in Example 1 except that the polyimide resin solution (f) was used. The evaluation results of the polyimide-nanocomposite film H are shown in Table 1.
- a polyimide film having a thickness of 80 ⁇ m was obtained in the same manner as in Example 1 except that the polyimide resin solution (g) was used.
- the polyimide had a tensile modulus of 3.2 GPa, a tensile strength of 126.9 MPa, a surface hardness of ⁇ 6B, a total light transmittance of 89.9%, a YI value of 1.6, and a flex resistance of A.
- a polyimide nanocomposite film I having a thickness of 55 ⁇ m was obtained in the same manner as in Example 1 except that the polyimide resin solution (g) was used.
- the evaluation results of the polyimide-nanocomposite film I are shown in Table 1.
- ⁇ Comparative example 4> 2. 2,2′-bis (4- (4-aminophenoxy) phenyl) propane (Wakayama Seika Kogyo Co., Ltd.) in a five-neck glass round bottom flask similar to that used in Example 2. 173 g (0.073 mol), ⁇ -butyrolactone (Mitsubishi Chemical Co., Ltd.) 45.612 g, and triethylamine (Kanto Chemical Co., Ltd.) 3.719 g as a catalyst, system temperature 70 ° C. under nitrogen atmosphere, The solution was obtained by stirring at 200 rpm.
- the mixture is diluted with ⁇ -butyrolactone at any time (total addition amount 29.8 g), and when the total stirring time is 5.25 hours, N, N-dimethyl is added so that the solid content concentration becomes 20% by mass.
- N N-dimethyl is added so that the solid content concentration becomes 20% by mass.
- the mixture was stirred at about 100 ° C. for about 3 hours to obtain a uniform solution, and a polyimide resin solution (h) having a solid content concentration of 20 mass% and a logarithmic viscosity of 1.3 dL / g was obtained. Further, disappearance of the raw material peak and the appearance of a peak derived from the imide skeleton were confirmed by FT-IR.
- a polyimide film having a thickness of 50 ⁇ m was obtained in the same manner as in Example 1 except that the polyimide resin solution (h) was used.
- the polyimide film had a tensile strength of 2.2 GPa, a tensile strength of 86.7 MPa, a surface hardness of ⁇ 6B, a total light transmittance of 89.7%, a YI value of 1.3, and an evaluation of flex resistance of A. It was.
- a polyimide nanocomposite film J having a thickness of 54 ⁇ m was obtained in the same manner as in Example 1 except that the polyimide resin solution (h) was used.
- the evaluation results of the polyimide-nanocomposite film J are shown in Table 1.
- the tensile modulus of the polyimide film was 2.6 GPa, the tensile strength was 104.3 MPa, the surface hardness was ⁇ 6B, the total light transmittance was 89.3%, the YI value was 2.5, and the flex resistance was evaluated as A. It was.
- a polyimide nanocomposite film K having a thickness of 56 ⁇ m was obtained in the same manner as in Example 1 except that the polyimide resin solution (i) was used.
- the evaluation results of the polyimide-nanocomposite film K are shown in Table 1.
- This polyimide resin film has a tensile modulus of 3.3 GPa, a tensile strength of 105.8 MPa, a surface hardness of ⁇ 6B, a total light transmittance of 86.2%, a YI value of 8.5, and an evaluation of flex resistance of A Met.
- a polyimide nanocomposite film L having a thickness of 53 ⁇ m was obtained in the same manner as in Example 1 except that the polyimide resin solution (j) was used.
- the evaluation results of the polyimide-nanocomposite film L are shown in Table 1.
- Example 7 The same as in Example 1 except that 20 g of colloidal silica dispersion (“DMAC-ST” manufactured by Nissan Chemical Industries, Ltd., silica content 20 mass%, average particle size 11 nm, N, N-dimethylacetamide solution) was used.
- a polyimide-nanocomposite film M having a thickness of 45 ⁇ m was obtained by this method.
- the polyimide-nanocomposite film M has a tensile modulus of 4.5 GPa, a tensile strength of 119 MPa, a surface hardness of ⁇ 6B, a total light transmittance of 88%, a YI value of 4.4, and an evaluation of flex resistance of A. It was.
- mTB 2,2′-dimethylbenzidine (m-tolidine)
- TFMB 2,2′-bis (trifluoromethyl) benzidine
- BAPP 2,2-bis [4- (4-aminophenoxy) phenyl] propane
- ODA 4,4′-diaminodiphenyl ether
- HAB 3,3′-dihydroxy Benzidine
- the polyimide resin of the present invention has solubility in a specific solvent, heat resistance, and transparency. For this reason, it is possible to easily increase the molecular weight to a certain level or more by solution polymerization, and it is also known that the affinity with fine particles is good.
- the polyimide resin composition of the present invention contains a polyimide resin having the above characteristics and silica fine particles, can form a film having mechanical strength, surface hardness, and bending resistance, and is suitably used as various optical films. It is done.
- the polyimide film and laminate of the present invention exhibit excellent performance as a flexible display front plate, organic EL material, IR cut filter and the like.
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Abstract
Description
1.下記式(1)及び下記式(2):
で表わされる繰り返し単位を含むポリイミド樹脂と、シリカ微粒子とを含有する、ポリイミド樹脂組成物であって、前記式(1)及び前記式(2)で表わされる繰り返し単位の合計量に対する、前記式(2)で表わされる繰り返し単位の割合が、20~60モル%である、ポリイミド樹脂組成物。
2.前記ポリイミド樹脂およびシリカ微粒子の合計量に対するシリカ微粒子の割合が、40~60質量%である、上記1に記載のポリイミド樹脂組成物。
3.上記1又は2に記載のポリイミド樹脂組成物からなる、ポリイミドフィルム。
4.さらに、少なくとも一方の面にハードコート層が形成されてなる、上記3に記載のポリイミドフィルム。
5.プラスチックフィルム、シリコンウェハー、金属箔及びガラスから選ばれる少なくとも1つの基材と、該基材の少なくとも一方の面に前記1又は2に記載のポリイミド樹脂組成物を用いて形成されてなるポリイミド樹脂層とを有する積層体。
6.前記式(1)及び前記式(2)で表わされる繰り返し単位を含むポリイミド樹脂であり、前記式(1)及び前記式(2)で表わされる繰り返し単位の合計量に対する、前記式(2)で表わされる繰り返し単位の割合が、20~60モル%である、ポリイミド樹脂。
7.前記6に記載のポリイミド樹脂からなるポリイミドフィルムの少なくとも一方の面にハードコート層が形成された、ポリイミドフィルム。
本発明のポリイミド樹脂組成物は、本発明のポリイミド樹脂とシリカ微粒子とを含有する。以下、本発明のポリイミド樹脂組成物に含有される成分について説明する。
[ポリイミド樹脂]
本発明のポリイミド樹脂は、下記式(1)及び下記式(2)で表わされる繰り返し単位を含有し、下記式(1)及び下記式(2)で表わされる繰り返し単位の合計量に対する、下記式(2)で表わされる繰り返し単位の割合が、20~60モル%であることを特徴とする。
式(1)及び式(2)で表わされる繰り返し単位の合計量に対する、式(2)で表わされる繰り返し単位の割合は、機械的強度、表面硬度及び透明性の観点から、20~60モル%であり、30~50モル%であることが好ましい。
本発明のポリイミド樹脂はその全構成単位中に、式(1)、式(2)で表わされる繰り返し単位以外の繰り返し単位として、下記式(3)で表わされる繰り返し単位を含んでもよい。
式(3)において、R1は2,2’-ジメチルベンジジン、2,2’-ビス(トリフルオロメチル)ベンジジン以外の、下記に示す芳香族ジアミンに由来する2価の基、脂肪族ジアミンに由来する2価の基、又は脂環族ジアミンに由来する2価の基である。
(I)ジアミン成分(Z)、有機溶媒、及び必要に応じて触媒を含む混合物を10~600rpmで攪拌して均一溶液とし、これを温度30~90℃に保ち、テトラカルボン酸成分(Y)及び必要に応じて触媒を添加する。
(II)テトラカルボン酸成分(Y)、有機溶媒、及び必要に応じて触媒を含む混合物を10~600rpmで攪拌して均一溶液とし、これを温度30~90℃に保ち、ジアミン成分(Z)及び必要に応じて触媒を添加する。
(III)(I)又は(II)の方法の後に、0.1~6時間かけて160~230℃、好ましくは180~205℃まで昇温する。この温度は使用する有機溶媒の沸点によって左右される。反応系外に除去される成分を捕集しつつ、温度を0.5~24時間、好ましくは2~12時間ほぼ一定に保つ。その後必要ならば有機溶媒を更に添加し、適温まで冷却する。
シリカ微粒子に使用されるシリカとは、二酸化ケイ素(SiO2)のことであり、その形態(結晶形態、無定形など)については限定されない。また、シリカ微粒子の形状も特に限定されず、球状、楕円形状、扁平状、ロッド状、繊維状などが挙げられる。
本発明に用いられるシリカ微粒子は、ポリイミド樹脂組成物及びポリイミドフィルムにおいて高い光線透過率を保持する観点から、粒径が小さいことが好ましく、その平均粒子径は、好ましくは1~100nm、より好ましくは1~50nm、更に好ましくは5~25nmの範囲である。シリカ微粒子の平均粒子径は、例えばBET法により測定することができる。
シランカップリング剤としては公知のものを用いることができるが、ポリイミド樹脂との親和性の観点から、アミノ基含有シランカップリング剤が好ましい。アミノ基含有シランカップリング剤としては、例えば、3-(2-アミノエチルアミノ)プロピルジメトキシメチルシラン、3-(2-アミノエチルアミノ)プロピルトリメトキシシラン、3-(2-アミノエチルアミノ)プロピルトリエトキシシラン、3-(3-アミノプロピルアミノ)プロピルトリエトキシシラン、3-(3-アミノプロピルアミノ)プロピルトリメトキシシラン、3-アミノプロピルジエトキシメチルシラン、3-アミノプロピルトリエトキシシラン、3-アミノプロピルトリメトキシラン等が挙げられる。これらは単独で、又は2種以上を組み合わせて用いることができる。
本発明のポリイミド樹脂組成物は、本発明の効果を損なわない範囲で、前記ポリイミド樹脂及びシリカ微粒子以外の添加剤を含有してもよい。添加剤としては、例えば、有機溶剤、酸化防止剤、光安定剤、界面活性剤、難燃剤、可塑剤、前記ポリイミド樹脂以外のポリイミド樹脂、ポリアミド樹脂、ポリアミドイミド樹脂等の化合物が挙げられる。上記有機溶剤としては、ポリイミド樹脂の製造時に使用される有機溶媒として前記で例示された化合物、後述するシリカ微粒子の分散媒やポリイミド樹脂組成物中の固形分濃度を制御する目的で添加する希釈剤として例示される化合物が挙げられ、好ましいものも同じである。
本発明のポリイミド樹脂組成物の調製方法には特に制限はなく、公知の方法を用いることができる。例えば、ポリイミド樹脂溶液にアルコキシシランやポリアルコキシシランを添加し、水等の加水分解促進剤を少量加え、ゾル-ゲル法により溶液中にシリカ微粒子を分散させる方法が挙げられる。また、コロイダルシリカとして気相法で製造したシリカ微粒子の粉末を、ポリイミド樹脂溶液に直接添加、混合することにより調製してもよい。
本発明は、前記ポリイミド樹脂組成物からなるポリイミドフィルムを提供する。また、本発明は、前記ポリイミド樹脂からなるポリイミドフィルムの少なくとも一方の面にハードコート層が形成されたポリイミドフィルムを提供する。なお、本明細書において、前記ポリイミド樹脂組成物からなるポリイミドフィルムのことを、ポリイミド-ナノコンポジットフィルムということがある。
本発明のポリイミドフィルムは、ポリイミド樹脂を含む溶液、または有機溶剤を含む前記ポリイミド樹脂組成物をガラス板、金属板、プラスチックなどの平滑な支持体上に塗布(キャスト)し、加熱して溶媒成分を蒸発させることにより製造できる。
本発明は、プラスチックフィルム、シリコンウェハー、金属箔及びガラスから選ばれる少なくとも1つの基材と前記基材の少なくとも一方の面に設けられるポリイミド樹脂組成物を用いて形成されてなるポリイミド樹脂層とを有する積層体を提供する。本発明の積層体は、前記ポリイミド層を少なくとも1つ有していればよく、2つ以上有していてもよい。
基材の少なくとも一方の面に設けられるポリイミド樹脂層は、本発明のポリイミド樹脂組成物を用いて形成されてなる。また、ポリイミド樹脂層の厚みは、積層体の用途等に応じて適宜選択することができるが、好ましくは0.5~50μm、より好ましくは1~10μmである。
前記ポリイミド樹脂層は、本発明の効果を損なわない範囲で、酸化チタン微粒子、ジルコニア微粒子、金ナノ微粒子、酸化ニオブ、アルミナ微粒子等の他、ポリカーボネート、ポリスチレン、ポリアミド、ポリエチレンテレフタレート等のポリエステル、ポリエーテルスルホン、ポリカルボン酸、ポリアセタール、ポリフェニレンエーテル、ポリスルホン、ポリブチレン、ポリプロピレン、ポリアクリルアミド、ポリ塩化ビニル等を含んでもよい。
本発明の積層体に用いられる基材は、プラスチックフィルム、シリコンウェハー、金属箔及びガラスから選ばれる。
プラスチックフィルムを構成する樹脂としては、例えば、エチレン、プロピレン、イソブテン等の単独重合体又は共重合体等のポリオレフィン、環状ポリオレフィン等の非晶質ポリオレフィン、ポリエチレンテレフタレート、ポリエチレン-2,6-ナフタレート等のポリエステル、ナイロン6、ナイロン66、ナイロン12、共重合ナイロン等のポリアミド、ポリビニルアルコール、エチレン-酢酸ビニル共重合体部分加水分解物(EVOH)、ポリイミド、ポリエーテルイミド、ポリサルホン、ポリエーテルサルホン、ポリエーテルエーテルケトン、ポリカーボネート、ポリアリレート、フッ素樹脂、アクリル樹脂、ポリ乳酸等の生分解性樹脂等が挙げられる。これらのうち、耐熱性及び寸法安定性の観点から、ポリエチレン-2,6-ナフタレート、ポリイミド、ポリエーテルイミド、ポリサルホン、ポリエーテルサルホン、ポリカーボネートが好ましい。
金属箔を構成する金属としては、導電性を有するものであれば特に制限はなく、例えば、金、銀、銅、鉄、ニッケルが挙げられる。これらのうち、銀又は銅が好ましく、銅がより好ましい。
本発明の積層体の製造方法には特に制限はなく、公知の方法を用いることができる。例えば、前記基材に、有機溶剤を含む本発明のポリイミド樹脂組成物を塗布した後、該有機溶剤を除去する方法等が挙げられる。
下記実施例で得たフィルム(ポリイミドフィルム、ポリイミド-ナノコンポジットフィルム、ハードコート積層フィルム)の物性は以下に示す方法によって測定した。
測定はJIS K5600-5-4に準拠し、新東科学株式会社製表面性測定器「TYPE14FW」を用いた。
(2)引張弾性率、引張強度
測定はASTM-882-88に準拠し、東洋精機株式会社製引張試験機「ストログラフVC-1」を用いて行った。
(3)全光線透過率、YI
測定はJIS K7105に準拠し、日本電色工業株式会社色彩・濁度同時測定器(COH400)を用いて行った。
(4)耐屈曲性
測定はポリイミドフィルムをR=0mmまで1度折り曲げ、破断するかを試験した。測定は5回実施し、折り曲げた5箇所のうち、全てで破断しなければA(破断箇所0個)、1箇所でも破断しなければB(破断箇所1~4個)、全てで破断すればC(破断箇所5個)と記載した。
ステンレス製半月型攪拌翼、窒素導入管、冷却管を取り付けたディーンスターク、温度計、ガラス製エンドキャップを備えた2Lの5つ口ガラス製丸底フラスコ中で、2,2’-ジメチルベンジジン(和歌山精化工業(株)製)112.68g(0.530モル)、2,2’-ビス(トリフルオロメチル)ベンジジン(和歌山精化工業(株)製)42.50g(0.133モル)、γ-ブチロラクトン(三菱化学(株)製)297.15g、及び触媒としてトリエチルアミン(関東化学(株)製)33.57gを、反応系内温度70℃、窒素雰囲気下、200rpmで攪拌して溶液を得た。これに1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学(株)製)147.85g(0.663モル)とN,N-ジメチルアセトアミド(三菱ガス化学(株)製)74.27gをそれぞれ一括で加えた後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、撹拌数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃で3.5時間維持した。N,N-ジメチルアセトアミド48.26g添加しさらに190℃で1時間維持した。その後N,N-ジメチルアセトアミド36.18gを添加し、1時間190℃で保持した。最後にN,N-ジメチルアセトアミド664.14gを添加後、100℃付近で約3時間攪拌して均一な溶液とし、固形分濃度20質量%、対数粘度1.4dL/gのポリイミド樹脂溶液(a)を得た。
ポリイミド樹脂溶液(a)を1H NMRにより分析した結果、得られたポリイミド樹脂中の、2,2’-ジメチルベンジジンに由来する構成単位と2,2’-ビス(トリフルオロメチル)ベンジジンに由来する構成単位の合計に対する2,2’-ビス(トリフルオロメチル)ベンジジンに由来する構成単位の割合は、20モル%であった。また、FT-IRにより原料ピークの消失およびイミド骨格に由来するピークの出現を確認した。
得られたポリイミド樹脂溶液(a)をガラス基板上に塗布し、60℃30分、100℃1時間の条件で溶媒を蒸発させて自己支持性フィルムとした後、該自己支持性フィルムをガラス基板から剥離し、フィルム端部を固定し、280℃、窒素雰囲気下で、2時間乾燥することにより溶媒を除去し、厚さ65μmのポリイミドフィルムを得た。このポリイミドフィルムの引張弾性率は3.4GPa、引張強度は121.2MPa、表面硬度は<6B、全光線透過率は90.3%、YI値は1.5、耐屈曲性の評価はAであった。
ポリイミド樹脂溶液(a)50.0g、及びコロイダルシリカ分散液(「DMAC-ST」日産化学工業(株)製、シリカ含有量20質量%、平均粒子径11nm、N,N-ジメチルアセトアミド溶液)40gを自転公転ミキサー(株式会社シンキー製、ARE-250)で2000rpm、2分撹拌することで、ポリイミド-ナノシリカコンポジット溶液を得た。その溶液をガラス基板上に塗布し、60℃30分、100℃1時間の条件で溶媒を蒸発させて自己支持性フィルムとした後、該自己支持性フィルムをガラス基板から剥離し、フィルム端部を固定し、280℃窒素雰囲気下、2時間乾燥し、厚さ58μmのポリイミド-ナノコンポジットフィルムAを得た。ポリイミド-ナノコンポジットフィルムAの評価結果を表1に示す。
ステンレス製半月型攪拌翼、窒素導入管、冷却管を取り付けたディーンスターク、温度計、ガラス製エンドキャップを備えた300mL五つ口ガラス製丸底フラスコ中で2,2’-ジメチルベンジジン(和歌山精化工業(株)製)12.634g(0.060モル)2,2’-ビス(トリフルオロメチル)ベンジジン(和歌山精化工業(株)製)12.706g(0.040モル)、γ-ブチロラクトン(三菱化学(株)製)46.518g、及び触媒としてトリエチルアミン(関東化学(株)製)5.018gを、反応系内温度70℃、窒素雰囲気下、200rpmで攪拌して溶液を得た。これに1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学(株)製)22.235g(0.099モル)とN,N-ジメチルアセトアミド(三菱ガス化学(株)製)11.629gをそれぞれ一括で加えた後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、撹拌数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃に3.75時間維持した。N,N-ジメチルアセトアミド4.92g添加しさらに190℃で1.5時間撹拌した。最後にN,N-ジメチルアセトアミド112.94gを添加後、100℃付近で約3時間攪拌して均一な溶液とし、固形分濃度20質量%、対数粘度1.3dL/gのポリイミド樹脂溶液(b)を得た。
実施例1と同様の方法により分析した結果、得られたポリイミド樹脂中の、2,2’-ジメチルベンジジンに由来する構成単位と2,2’-ビス(トリフルオロメチル)ベンジジンに由来する構成単位の合計に対する2,2’-ビス(トリフルオロメチル)ベンジジンに由来する構成単位の割合は、40モル%であった。また、FT-IRにより原料ピークの消失およびイミド骨格に由来するピークの出現を確認した。
ポリイミド樹脂溶液(b)を用いた以外は実施例1と同様の方法で厚さ62μmのポリイミドフィルムを得た。このポリイミドフィルムの引張弾性率は3.6GPa、表面硬度は<6B、全光線透過率は90.3%、YI値は1.8、耐屈曲性の評価はAであった。
ポリイミド樹脂溶液(b)を用いた以外は実施例1と同様の方法で厚さ45μmポリイミド-ナノコンポジットフィルムBを得た。ポリイミド-ナノコンポジットフィルムBの評価結果を表1に示す。
実施例2で使用したものと同様の五つ口ガラス製丸底フラスコ中で2,2’-ジメチルベンジジン(和歌山精化工業(株)製)8.032g(0.038モル)、2,2’-ビス(トリフルオロメチル)ベンジジン(和歌山精化工業(株)製)18.174g(0.057モル)、γ-ブチロラクトン(三菱化学(株)製)46.355g、及び触媒としてトリエチルアミン(関東化学(株)製)4.786gを、反応系内温度70℃、窒素雰囲気下、200 rpmで攪拌して溶液を得た。これに1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学(株)製)21.203g(0.095モル)とN,N-ジメチルアセトアミド(三菱ガス化学(株)製)11.59gをそれぞれ一括で加えた後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、撹拌数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃に5.75時間維持し、ポリイミド溶液を得た。最後にN,N-ジメチルアセトアミド118.06gを添加後、100℃付近で約3時間攪拌して均一な溶液とし、固形分濃度20質量%、対数粘度1.3dL/gのポリイミド樹脂溶液(c)を得た。
実施例1と同様の方法により分析した結果、得られたポリイミド樹脂中の、2,2’-ジメチルベンジジンに由来する構成単位と2,2’-ビス(トリフルオロメチル)ベンジジンに由来する構成単位の合計に対する2,2’-ビス(トリフルオロメチル)ベンジジンに由来する構成単位の割合は、60モル%であった。また、FT-IRにより原料ピークの消失およびイミド骨格に由来するピークの出現を確認した。
ポリイミド樹脂溶液(c)を用いた以外は実施例1と同様の方法で厚さ64μmのポリイミドフィルムを得た。このポリイミドフィルムの引張弾性率は3.1GPa、引張強度は132.1MPa、表面硬度は<6B、全光線透過率は90.7%、YI値は1.8、耐屈曲性の評価はAであった。
ポリイミド樹脂溶液(c)を用いた以外は実施例1と同様の方法で厚さ56μmポリイミド-ナノコンポジットフィルムCを得た。ポリイミド-ナノコンポジットフィルムCの評価結果を表1に示す。
実施例2で使用したものと同様の五つ口ガラス製丸底フラスコ中で2,2’-ジメチルベンジジン(和歌山精化工業(株)製)10.278g(0.048モル)、2,2’-ビス(トリフルオロメチル)ベンジジン(和歌山精化工業(株)製)15.505g(0.048モル)、γ-ブチロラクトン(三菱化学(株)製)46.435g、及び触媒としてトリエチルアミン(関東化学(株)製)4.899gを、反応系内温度70℃、窒素雰囲気下、200rpmで攪拌して溶液を得た。これに1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学(株)製)21.707g(0.097モル)とN,N-ジメチルアセトアミド(三菱ガス化学(株)製)11.61gをそれぞれ一括で加えた後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、撹拌数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃に5.75時間維持し、ポリイミド溶液を得た。最後にN,N-ジメチルアセトアミド117.96gを添加後、100℃付近で約3時間攪拌して均一な溶液とし、固形分濃度20質量%、対数粘度1.2dL/gのポリイミド樹脂溶液(d)を得た。
実施例1と同様の方法により分析した結果、得られたポリイミド樹脂中の、2,2’-ジメチルベンジジンに由来する構成単位と2,2’-ビス(トリフルオロメチル)ベンジジンに由来する構成単位の合計に対する2,2’-ビス(トリフルオロメチル)ベンジジンに由来する構成単位の割合は、50モル%であった。また、FT-IRにより原料ピークの消失およびイミド骨格に由来するピークの出現を確認した。
ポリイミド樹脂溶液(d)を用いた以外は実施例1と同様の方法で厚さ55μmのポリイミドフィルムを得た。このポリイミドの引張弾性率は3.3GPa、引張強度は114.7MPa、表面硬度は<6B、全光線透過率は90.4%、YI値は1.8、耐屈曲性の評価はAであった。
ポリイミド樹脂溶液(d)を用いた以外は実施例1と同様の方法で45μmのポリイミド-ナノコンポジットフィルムDを得た。ポリイミド-ナノコンポジットフィルムDの評価結果を表1に示す。
実施例2で使用したものと同様の300mL五つ口ガラス製丸底フラスコにウレタンアクリル系ハードコート剤(日立化成(株)製、ヒタロイド7902-1)102.6g、紫外線吸収剤として2’-エチルヘキシル-2-シアノ-3,3’-ジフェニルアクリレート(シプロ化成(株)製、SEESORB502)9.4g、光重合開始剤として1-ヒドロキシシクロヘキシルフェニルケトン(BASFジャパン(株)、IRGACURE184)4.6g、及び酢酸エチル(関東化学(株)製)83.4gを、窒素雰囲気下、200rpmで30分間攪拌してハードコート溶液を得た。
実施例1と同様の方法でポリイミド樹脂溶液(a)を用いて得た厚み60μmのポリイミドフィルムに、前段落で調製したハードコート溶液を適量滴下して、バーコーター#8を用いて製膜した。該製膜フィルムを予め温度80℃に加熱した熱風乾燥機中に2分間静置して余分な有機溶剤を揮発させ、その後出力密度80W/cmの高圧水銀灯を用いて、光源下10cmの位置でコンベアスピード3.0m/分で紫外線を照射して硬化させた。このようにしてハードコート層の塗膜厚が6.5μmである、ハードコート積層フィルムEを得た。ハードコート積層フィルムEの評価結果を表1に示す。
実施例1と同様の方法で得た厚み57μmのポリイミド-ナノコンポジットフィルムを用いたこと以外は実施例5と同様の方法でハードコート溶液を製膜し、ハードコート積層フィルムFを得た。ハードコート積層フィルムFの評価結果を表1に示す。
実施例2で使用したものと同様の五つ口ガラス製丸底フラスコ中で2,2’-ジメチルベンジジン(和歌山精化工業(株)製)3.838g(0.018モル)、2,2’-ビス(トリフルオロメチル)ベンジジン(和歌山精化工業(株)製)23.157g(0.072モル)、γ-ブチロラクトン(三菱化学(株)製)46.208g、及び触媒としてトリエチルアミン(関東化学(株)製)4.573gを、反応系内温度70℃、窒素雰囲気下、200rpmで攪拌して溶液を得た。これに1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学(株)製)20.263g(0.090モル)とN,N-ジメチルアセトアミド(三菱ガス化学(株)製)11.55gをそれぞれ一括で加えた後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、撹拌数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃に維持したまま5.75時間撹拌し、ポリイミド溶液を得た。最後にN,N-ジメチルアセトアミド118.242gを添加後、100℃付近で約3時間攪拌して均一な溶液とし、固形分濃度20質量%、対数粘度1.3dL/gのポリイミド樹脂溶液(e)を得た。
実施例1と同様の方法により分析した結果、得られたポリイミド樹脂中の、2,2’-ジメチルベンジジンに由来する構成単位とに2,2’-ビス(トリフルオロメチル)ベンジジン由来する構成単位の合計に対する2,2’-ビス(トリフルオロメチル)ベンジジンに由来する構成単位の割合は、80モル%であった。また、FT-IRにより原料ピークの消失およびイミド骨格に由来するピークの出現を確認した。ポリイミド樹脂溶液(e)を用いた以外は実施例1と同様の方法で厚さ48μmポリイミドフィルムを得た。このポリイミドフィルムの引張弾性率は2.8GPa、引張強度は107.5MPa、表面硬度は<6B、全光線透過率は90.4%、YI値は2.2、耐屈曲性の評価はAであった。
ポリイミド樹脂溶液(e)を用いた以外は実施例1と同様の方法で53μmのポリイミド-ナノコンポジットフィルムGを得た。ポリイミド-ナノコンポジットフィルムGの評価結果を表1に示す。
実施例2で使用したものと同様の五つ口ガラス製丸底フラスコ中で2,2’-ビス(トリフルオロメチル)ベンジジン(和歌山精化工業(株)製)30.237g(0.094モル)、γ-ブチロラクトン(三菱化学(株)製)50.261g、及び触媒としてトリエチルアミン(関東化学(株)製)4.777gを、反応系内温度70℃、窒素雰囲気下、200rpmで攪拌して溶液を得た。これに1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学(株)製)21.166g(0.094モル)とN,N-ジメチルアセトアミド(三菱ガス化学(株)製)12.57gをそれぞれ一括で加えた後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、撹拌数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃で5.75時間維持した。最後にN,N-ジメチルアセトアミド129.17gを添加後、100℃付近で約3時間攪拌して均一な溶液とし、固形分濃度20質量%、対数粘度1.2dL/gのポリイミド樹脂溶液(f)を得た。
また、FT-IRにより原料ピークの消失およびイミド骨格に由来するピークの出現を確認した。
ポリイミド樹脂溶液(f)を用いた以外は実施例1と同様の方法で厚さ48μmポリイミドフィルムを得た。このポリイミド樹脂フィルムの引張弾性率は2.9GPa、引張強度は121.9MPa、表面硬度は<6B、全光線透過率は90.9%、YI値は2.0、耐屈曲性はAであった。
ポリイミド樹脂溶液(f)を用いた以外は実施例1と同様の方法で厚さ48μmのポリイミド-ナノコンポジットフィルムHを得た。ポリイミド-ナノコンポジットフィルムHの評価結果を表1に示す。
実施例2で使用したものと同様の五つ口ガラス製丸底フラスコ中で2,2’-ジメチルベンジジン(和歌山精化工業(株)製)21.207g(0.100モル)、γ-ブチロラクトン(三菱化学(株)製)46.236g、及び触媒としてトリエチルアミン(関東化学(株)製)2.527gを、反応系内温度70℃、窒素雰囲気下、200rpmで攪拌して溶液を得た。これに1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学(株)製)22.393g(0.100モル)とN,N-ジメチルアセトアミド(三菱ガス化学(株)製)11.56gをそれぞれ一括で加えた後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、撹拌数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃に4.5時間維持し、ポリイミド溶液を得た。最後にN,N-ジメチルアセトアミド102.20gを添加後、100℃付近で約3時間攪拌して均一な溶液とし、固形分濃度20質量%、対数粘度1.2dL/gのポリイミド樹脂溶液(g)を得た。
また、FT-IRにより原料ピークの消失およびイミド骨格に由来するピークの出現を確認した。ポリイミド樹脂溶液(g)を用いた以外は実施例1と同様の方法で厚さ80μmのポリイミドフィルムを得た。このポリイミドの引張弾性率は3.2GPa、引張強度126.9MPa、表面硬度は<6B、全光線透過率は89.9%、YI値は1.6、耐屈曲性はAであった。
ポリイミド樹脂溶液(g)を用いた以外は実施例1と同様の方法で厚さ55μmのポリイミド-ナノコンポジットフィルムIを得た。ポリイミド-ナノコンポジットフィルムIの評価結果を表1に示す。
実施例2で使用したものと同様の五つ口ガラス製丸底フラスコ中で2,2’-ビス(4-(4-アミノフェノキシ)フェニル)プロパン(和歌山精化工業(株)製)30.173g(0.073モル)、γ-ブチロラクトン(三菱化学(株)製)45.612g、及び触媒としてトリエチルアミン(関東化学(株)製)3.719gを、系内温度70℃、窒素雰囲気下、200rpmで攪拌して溶液を得た。これに1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学(株)製)16.476g(0.073モル)とN,N-ジメチルアセトアミド(三菱ガス化学(株)製)11.40gをそれぞれ一括で加えた後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、撹拌数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃に4時間維持し、ポリイミド溶液を得た。粘度の上昇に合わせて随時γ-ブチロラクトンで希釈(合計添加量29.8g)しつつ合計撹拌時間が5.25時間経過したところで、固形分濃度が20質量%になるようにN,N-ジメチルアセトアミドを89.368g添加後、100℃付近で約3時間攪拌して均一な溶液とし、固形分濃度20質量%、対数粘度1.3dL/gのポリイミド樹脂溶液(h)を得た。
また、FT-IRにより原料ピークの消失およびイミド骨格に由来するピークの出現を確認した。
ポリイミド樹脂溶液(h)を用いた以外は実施例1と同様の方法で厚さ50μmのポリイミドフィルムを得た。このポリイミドフィルムの引張強度は2.2GPa、引張強度は86.7MPa、表面硬度は<6B、全光線透過率は89.7%、YI値は1.3、耐屈曲性の評価はAであった。
ポリイミド樹脂溶液(h)を用いた以外は実施例1と同様の方法で厚さ54μmのポリイミド-ナノコンポジットフィルムJを得た。ポリイミド-ナノコンポジットフィルムJの評価結果を表1に示す。
実施例2で使用したものと同様の五つ口ガラス製丸底フラスコ中で4,4’-ジアミノジフェニルエーテル(和歌山精化工業(株)製)22.686g(0.113モル)、γ-ブチロラクトン(三菱化学(株)製)47.014g、及び触媒としてトリエチルアミン(関東化学(株)製)5.732gを、反応系内温度70℃、窒素雰囲気下、200rpmで攪拌して溶液を得た。これに1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学(株)製)25.397g(0.113モル)とN,N-ジメチルアセトアミド(三菱ガス化学(株)製)11.75gをそれぞれ一括で加えた後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、撹拌数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃に4.75時間維持し、ポリイミド溶液を得た。N,N-ジメチルアセトアミド117.206g添加後、100℃付近で約3時間攪拌して均一な溶液とし、固形分濃度20質量%、対数粘度1.4dL/gのポリイミド樹脂溶液(i)を得た。
また、FT-IRにより原料ピークの消失およびイミド骨格に由来するピークの出現を確認した。
ポリイミド樹脂溶液(i)を用いた以外は実施例1と同様の方法で厚さ64μmのポリイミドフィルムを得た。ポリイミドフィルムの引張弾性率は2.6GPa、引張強度は104.3MPa、表面硬度は<6B、全光線透過率は89.3%、YI値は2.5、耐屈曲性の評価はAであった。
ポリイミド樹脂溶液(i)を用いた以外は実施例1と同様の方法で厚さ56μmのポリイミド-ナノコンポジットフィルムKを得た。ポリイミド-ナノコンポジットフィルムKの評価結果を表1に示す。
実施例2で使用したものと同様の五つ口ガラス製丸底フラスコ中で2,2’-ビス(トリフルオロメチル)ベンジジン(和歌山精化工業(株)製)14.034g(0.044モル)、3,3’-ジヒドロキシベンジジン(和歌山精化工業(株)製)9.496g(0.044モル),γ-ブチロラクトン(三菱化学(株)製)51.790g、及び触媒としてトリエチルアミン(関東化学(株)製)0.967gを、反応系内温度100℃、窒素雰囲気下、200rpmで攪拌して溶液を得た。これに1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学(株)製)19.757g(0.088モル)とN,N-ジメチルアセトアミド(三菱ガス化学(株)製)12.95gをそれぞれ一括で加えた後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、撹拌数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃で4.0時間維持した。最後にN,N-ジメチルアセトアミド95.26gを添加後、100℃付近で約3時間攪拌して均一な溶液とし、固形分濃度20質量%のポリイミド樹脂溶液(j)を得た。なお、ポリイミド樹脂溶液(j)の対数粘度は固形分抽出時の熱履歴により不溶化してしまうため測定することができなかった。
また、FT-IRにより原料ピークの消失およびイミド骨格に由来するピークの出現を確認した。
ポリイミド樹脂溶液(j)を用いた以外は実施例1と同様の方法で厚さ67μmポリイミドフィルムを得た。このポリイミド樹脂フィルムの引張弾性率は3.3GPa、引張強度は105.8MPa、表面硬度は<6B、全光線透過率は86.2%、YI値は8.5、耐屈曲性の評価はAであった。
ポリイミド樹脂溶液(j)を用いた以外は実施例1と同様の方法で厚さ53μmのポリイミド-ナノコンポジットフィルムLを得た。ポリイミド-ナノコンポジットフィルムLの評価結果を表1に示す。
コロイダルシリカ分散液(「DMAC-ST」日産化学工業(株)製、シリカ含有量20質量%、平均粒子径11nm、N,N-ジメチルアセトアミド溶液)を20g用いた以外は実施例1と同様の方法で厚さ45μmのポリイミド-ナノコンポジットフィルムMを得た。ポリイミド-ナノコンポジットフィルムMの引張弾性率は4.5GPa、引張強度は119MPa、表面硬度は<6B、全光線透過率は88%、YI値は4.4、耐屈曲性の評価はAであった。
mTB:2,2’-ジメチルベンジジン(m-トリジン)
TFMB:2,2’-ビス(トリフルオロメチル)ベンジジン
BAPP:2,2-ビス〔4-(4-アミノフェノキシ)フェニル〕プロパン
ODA:4,4’-ジアミノジフェニルエーテル
HAB:3,3’-ジヒドロキシベンジジン
Claims (7)
- 前記ポリイミド樹脂およびシリカ微粒子の合計量に対するシリカ微粒子の割合が、40~60質量%である、請求項1に記載のポリイミド樹脂組成物。
- 請求項1又は2に記載のポリイミド樹脂組成物からなる、ポリイミドフィルム。
- さらに、少なくとも一方の面にハードコート層が形成されてなる、請求項3に記載のポリイミドフィルム。
- プラスチックフィルム、シリコンウェハー、金属箔及びガラスから選ばれる少なくとも1つの基材と、該基材の少なくとも一方の面に請求項1又は2に記載のポリイミド樹脂組成物を用いて形成されてなるポリイミド樹脂層とを有する積層体。
- 請求項6に記載のポリイミド樹脂からなるポリイミドフィルムの少なくとも一方の面にハードコート層が形成された、ポリイミドフィルム。
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Also Published As
Publication number | Publication date |
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CN106795372B (zh) | 2019-06-18 |
EP3208313B1 (en) | 2019-01-30 |
KR102277807B1 (ko) | 2021-07-15 |
TW201620993A (zh) | 2016-06-16 |
JP6579110B2 (ja) | 2019-09-25 |
EP3208313A1 (en) | 2017-08-23 |
EP3208313A4 (en) | 2018-03-28 |
US20170306093A1 (en) | 2017-10-26 |
CN106795372A (zh) | 2017-05-31 |
TWI659066B (zh) | 2019-05-11 |
KR20170072885A (ko) | 2017-06-27 |
JPWO2016060213A1 (ja) | 2017-08-03 |
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