WO2019124096A1 - エステル樹脂、可塑化剤、セルロースエステル樹脂組成物、光学フィルム及び液晶表示装置 - Google Patents
エステル樹脂、可塑化剤、セルロースエステル樹脂組成物、光学フィルム及び液晶表示装置 Download PDFInfo
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- WO2019124096A1 WO2019124096A1 PCT/JP2018/044888 JP2018044888W WO2019124096A1 WO 2019124096 A1 WO2019124096 A1 WO 2019124096A1 JP 2018044888 W JP2018044888 W JP 2018044888W WO 2019124096 A1 WO2019124096 A1 WO 2019124096A1
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- ester resin
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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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
-
- 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
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/08—Cellulose derivatives
- C08L1/10—Esters of organic acids, i.e. acylates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/08—Cellulose derivatives
- C08L1/16—Esters of inorganic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- 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
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2301/08—Cellulose derivatives
- C08J2301/10—Esters of organic acids
-
- 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
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2301/08—Cellulose derivatives
- C08J2301/16—Esters of inorganic acids
-
- 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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
Definitions
- the present invention relates to an ester resin suitable as a plasticizer for a cellulose ester resin, a cellulose ester resin composition containing the same, an optical film obtained by using the resin composition, and a liquid crystal display device using the same.
- TAC triacetyl cellulose resin
- TAC has high moisture permeability, dimensional change due to moisture absorption, and hydrolysis easily occurs under moist heat conditions, it is necessary to suppress moisture absorption by the additive, and various additives have been provided (for example, Patent Document 1) , 2).
- the problem to be solved by the present invention is to a cellulose ester resin which can improve the moisture permeation resistance particularly when processed into a film, and is excellent in storage stability even in a wet heat environment.
- An ester resin which can be suitably used as a plasticizer, a resin composition containing the same, an optical film obtained by using the resin composition, and a liquid crystal display device using the same.
- the present invention provides the following general formula (1) B-(A-G) n- A-B (1)
- B is an aliphatic monoalcohol residue having 4 to 20 carbon atoms
- G is an alkylene glycol residue, an oxyalkylene glycol residue or an aryl glycol residue
- A is an alkylene dicarbon residue Containing an aryldicarboxylic acid residue (A2) in the total (A1 + A2) of the group (A1) or the aryldicarboxylic acid residue (A2), which is the sum of the alkylenedicarboxylic acid residue (A1) and the aryldicarboxylic acid residue (A2)
- the ratio is 70 to 100 mol%
- n is the number of repetitions
- G and A may be the same or different for each repetition
- a plurality of A and B may be the same or different.
- It is an ester resin represented by the following formula, and has a number average molecular weight of 350 to 1000.
- the present invention it is possible to improve the moisture resistance at the time of processing into a film, and is excellent in storage stability even in a moist heat environment, and an ester resin that can be suitably used as a plasticizer for cellulose ester resins.
- a resin composition containing the same, an optical film obtained using the resin composition, and a liquid crystal display using the same can be provided.
- the ester resin of the present invention has the following general formula (1) B-(A-G) n- A-B (1)
- B is an aliphatic monoalcohol residue having 4 to 20 carbon atoms
- G is an alkylene glycol residue, an oxyalkylene glycol residue or an aryl glycol residue
- A is an alkylene dicarbon residue Containing an aryldicarboxylic acid residue (A2) in the total (A1 + A2) of the group (A1) or the aryldicarboxylic acid residue (A2), which is the sum of the alkylenedicarboxylic acid residue (A1) and the aryldicarboxylic acid residue (A2)
- the ratio is 70 to 100 mol%
- n is the number of repetitions
- G and A may be the same or different for each repetition, and a plurality of A and B may be the same or different.
- an ester resin having a number average molecular weight of 350 to 1000.
- B in the general formula (1) is an aliphatic monoalcohol residue having 4 to 20 carbon atoms.
- a monoalcohol residue shows the group after removing a hydrogen atom from a hydroxyl group.
- the aliphatic group may be branched or linear, and examples thereof include 1-butanol, 2-butanol, isobutanol, t-butanol, 1-pentanol and isopentyl.
- Alcohol tert-pentyl alcohol, cyclopentanol, 1-hexanol, cyclohexanol, 1-heptanol, 1-octanol, 2-ethyl-1-hexanol, isononyl alcohol, 1-nonyl alcohol, tert-nonyl alcohol, decanol, Residues such as dodecanol, dodecahexanol, dodecaoctanol, allyl alcohol and oleyl alcohol may be mentioned, and they may be resins in which B in the general formula (1) is the same or a mixture of different resins.
- aliphatic monoalcohol residues having 6 to 12 carbon atoms are preferable from the viewpoint of having good compatibility with the cellulose ester resin and being excellent in storage stability as a resin composition and storage stability as a film. It is more preferable that it is an aliphatic monoalcohol residue having 9 to 12 carbon atoms, and it is particularly preferable that it is a nonyl alcohol residue or an isononyl alcohol residue.
- G in the general formula (1) is an alkylene glycol residue, an oxyalkylene glycol residue or an aryl glycol residue.
- a glycol residue shows the group after removing a hydrogen atom from a hydroxyl group.
- the alkylene glycol residue is preferably an alkylene glycol residue having 2 to 12 carbon atoms, from the viewpoint of easily expressing the effects of the present invention, for example, ethylene glycol, 1,2-propylene glycol, 1 , 3-propanediol, 1,2-butanediol, 1,3-butanediol, 2-methyl-1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 2,2-dimethyl 1,3-propanediol (neopentyl glycol), 2,2-diethyl-1,3-propanediol (3,3-dimethyl pentane), 2-n-butyl-2-ethyl-1,3-propane Diol (3,3-dimethylolheptane), 3-methyl-1,5-pentanediol, 1,6-hexanediol, 2, 2,4-trimethyl 1,3-pentan
- the viewpoint of being an ester resin which is more excellent in compatibility when mixed with a cellulose ester resin described later one having a carbon atom number of 3 or less not containing a branch between OH groups is preferable.
- it is a residue of 1,2-propylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 2-methyl-1,3-propanediol, neopentyl glycol More preferably, they are the residues of ethylene glycol and 1,2-propylene glycol.
- the oxyalkylene glycol residue is preferably an oxyalkylene glycol residue having 4 to 12 carbon atoms from the viewpoint of easily expressing the effects of the present invention, and examples thereof include diethylene glycol, triethylene glycol, and tetraethylene glycol. And residues of dipropylene glycol, tripropylene glycol and the like, which may be used alone or in combination of two or more.
- the aryl glycol residue is preferably an aryl glycol residue having 6 to 18 carbon atoms, from the viewpoint of more easily expressing the effects of the present invention.
- an alkylene oxide of hydroquinone, resorcinol, bisphenol A, bisphenol A Residues such as adducts, bisphenol F, alkylene oxide adducts of bisphenol F, biphenols, and alkylene oxide adducts of biphenols may be mentioned, and they may be used alone or in combination of two or more.
- a in the general formula (1) is an alkylenedicarboxylic acid residue (A1) or an aryldicarboxylic acid residue (A2).
- the dicarboxylic acid residue refers to a group other than —OH in the carboxy group.
- the alkylene dicarboxylic acid residue (A1) is preferably an alkylene dicarboxylic acid residue having 2 to 12 carbon atoms, from the viewpoint of more easily exhibiting the effects of the present invention, for example, oxalic acid, malonic acid, Residues such as succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, 1,2-dicarboxycyclohexane, 1,2-dicarboxycyclohexene and the like can be mentioned, and even if they are alone, they have two or more species in combination. It is also good.
- a residue of succinic acid, adipic acid, and 1,2-dicarboxycyclohexane is preferable, and a residue of adipic acid is the most preferable because an optical film having more excellent moisture permeation resistance can be obtained.
- Examples of the aryldicarboxylic acid residue (A2) include phthalic acid, terephthalic acid, isophthalic acid, 1,4-naphthalenedicarboxylic acid, 2,3-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, and 2,7.
- -Residues such as -naphthalenedicarboxylic acid and 1,8-naphthalenedicarboxylic acid may be mentioned, and may be used alone or in combination of two or more.
- phthalic acid, terephthalic acid and isophthalic acid residues are preferable, and phthalic acid residues are most preferable, since an optical film having higher strength can be obtained.
- the content of the aryldicarboxylic acid residue (A2) in the total number of moles (A1 + A2) of the alkylenedicarboxylic acid residue (A1) and the aryldicarboxylic acid residue (A2) in A in the general formula (1) is the present invention
- ester resin represented by the above general formula (1) which is a mixture of compounds in which B, G and A are the same and n, ie, only the number of repetitions is different, or It may be a mixture of compounds in which B, G, A and n in the general formula (1) are different.
- the GPC measurement in the present invention is carried out under the following conditions.
- [GPC measurement conditions] Measuring device: High-speed GPC apparatus "HLC-8320GPC” manufactured by Tosoh Corporation Column: Tosoh Corporation "TSK GURDCOLUMN Super HZ-L” + Tosoh Corporation "TSK gel Super HZ M-M” + Tosoh Corporation "TSK gel Super HZ M-M” + Tosoh Corporation "TSK gel Super HZ-2000” + Tosoh Corporation “TSK gel Super HZ-2000” Detector: RI (differential refractometer) Data processing: Tosoh Corporation "EcoSEC Data Analysis version 1.07" Column temperature: 40 ° C Developing solvent: tetrahydrofuran Flow rate: 0.35 mL / min Measurement sample: A sample of 7.5 mg was dissolved in 10 ml of tetrahydrofuran, and the solution obtained was filtered with a microfilter to obtain a measurement sample. Sample injection
- B is an aliphatic monoalcohol residue having 6 to 12 carbon atoms
- G is an alkylene glycol having 2 to 12 carbon atoms.
- the residue is an oxyalkylene glycol residue having 4 to 12 carbon atoms or an aryl glycol residue having 6 to 18 carbon atoms
- an alkylene dicarboxylic acid residue (A1) in A is an alkylene dicarboxylic acid having 2 to 12 carbon atoms
- the aryldicarboxylic acid residue (A2) in A is an aryldicarboxylic acid residue having 6 to 12 carbon atoms
- B is a nonyl alcohol residue or an isononyl alcohol residue.
- G is a residue of ethylene glycol or 1,2-propylene glycol
- A1 is adipic acid residue
- A2 is a residue of phthalic acid Rukoto is most preferable.
- the ester resin of the present invention has a number average molecular weight in the range of 350 to 1000, and preferably in the range of 400 to 800, from the viewpoint of achieving both compatibility and film physical properties.
- the average value of the repeating number n in the general formula (1) is preferably in the range of 0.2 to 3 from the viewpoint of achieving both compatibility and physical properties of the film.
- the number average molecular weight and the average value of n are also values measured by the above-mentioned GPC measurement.
- the acid value of the ester resin of the present invention is preferably 5 or less, more preferably 1 or less, from the viewpoint of better compatibility with the cellulose ester resin. Moreover, it is preferable that it is 50 or less, and, as for the hydroxyl value of ester resin, it is more preferable that it is 20 or less from the same viewpoint.
- the ester resin of the present invention is produced, for example, by esterification reaction of the above-mentioned raw material, if necessary, in the presence of an esterification catalyst, for example, in a temperature range of 180 to 250 ° C. for 10 to 25 hours. be able to.
- the conditions such as the temperature and time of the esterification reaction are not particularly limited, and may be set as appropriate.
- the dicarboxylic acid the acid itself may be used as a raw material, or an esterified product, an acid chloride, an anhydride or the like may be used as the raw material.
- esterification catalyst examples include titanium-based catalysts such as tetraisopropyl titanate and tetrabutyl titanate; tin-based catalysts such as dibutyl tin oxide; and organic sulfonic acid-based catalysts such as p-toluenesulfonic acid.
- the amount of the esterification catalyst used may be appropriately set, but in general, it is preferably used in the range of 0.001 to 0.1 parts by mass with respect to 100 parts by mass of the total amount of the raw materials.
- the properties of the ester resin of the present invention vary depending on factors such as the number average molecular weight and the combination of raw materials, but usually they are liquid, solid, paste-like, etc. at normal temperature.
- an ester resin a compound having a carboxy group at the end obtained by using the above-mentioned alkylene glycol, oxyalkylene glycol or aryl glycol and dicarboxylic acid is reacted with aliphatic monoalcohol The method is mentioned.
- the alkylene glycol, oxyalkylene glycol or aryl glycol, dicarboxylic acid and monoalcohol may be charged at once into a reaction system, and these may be reacted, or alkylene glycol, oxyalkylene glycol or aryl glycol and dicarboxylic acid After obtaining the compound which has a carboxy group at the terminal obtained by using and, monoalcohol is further charged to a reaction system, and it may be a sequential reaction.
- the content of high-molecular weight components may be adjusted.
- the ester resin of the present invention obtained by such a method etc. can be made excellent in the balance between the moisture permeation resistance and storage stability of the obtained film by blending it with a cellulose ester resin, It can be used as a plasticizer, and in particular, it can be suitably used as an optical film.
- the compounding amount of the ester resin of the present invention with respect to the cellulose ester resin may be determined according to the target performance (moisture resistance, storage stability, transparency, etc.), for example, 100 parts by mass of the cellulose ester resin. It is in the range of 0.1 to 50 parts by mass, preferably in the range of 1 to 30 parts by mass, and more preferably in the range of 5 to 20 parts by mass.
- cellulose ester resin examples include those obtained by esterifying part or all of the hydroxyl groups of cellulose obtained from cotton linter, wood pulp, kenaf and the like.
- cellulose ester resin examples include cellulose acetate, cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate phthalate, and cellulose nitrate.
- cellulose acetate is used. Is preferable because a film excellent in mechanical properties and transparency can be obtained.
- These cellulose ester resins may be used alone or in combination of two or more.
- the cellulose acetate preferably has a polymerization degree in the range of 250 to 400, and an acetylation degree in the range of 54.0 to 62.5% by mass, and more preferably 58.0 to 62.5. More preferably, it is in the range of mass%. If the degree of polymerization and the degree of acetylation of the cellulose acetate are within the range, a film having excellent mechanical properties can be obtained. In the present invention, it is more preferable to use so-called cellulose triacetate.
- the degree of acetylation referred to in the present invention is the mass ratio of acetic acid produced by saponifying the cellulose acetate to the total amount of cellulose acetate.
- the number average molecular weight of the cellulose acetate is preferably in the range of 70,000 to 300,000, and more preferably in the range of 80,000 to 200,000. When the number average molecular weight of the cellulose acetate is in this range, a film having excellent mechanical properties can be easily obtained.
- the optical film in the present invention uses a cellulose ester resin composition containing the ester resin of the present invention and a cellulose ester resin, and, if necessary, a resin composition containing other various additives and the like. It is also good.
- an unstretched optical film can be extruded using an extruder or the like equipped with a T-die, a circular die or the like.
- the resin composition obtained by melt-kneading the above-mentioned ester resin, cellulose ester resin, other additives and the like in advance may be used. And can be extruded as it is.
- the additive examples include other modifiers other than the ester resin of the present invention, a thermoplastic resin, an ultraviolet absorber, a matting agent, an antidegradant (for example, an antioxidant, a peroxide decomposer, radical inhibition Agents, metal deactivators, acid scavengers, etc.), dyes and the like.
- ester resins other than the ester resins specified in the present invention examples include ester resins other than the ester resins specified in the present invention, phosphate esters such as triphenyl phosphate (TPP), tricresyl phosphate, cresyl diphenyl phosphate, dimethyl phthalate, diethyl phthalate, Phthalate esters such as dibutyl phthalate, di-2-ethylhexyl phthalate, ethyl phthalyl ethyl glycolate, butyl phthalyl butyl glycolate, trimethylolpropane tribenzoate, pentaerythritol tetraacetate, tributyl acetyl citrate, etc. It can be used in the range which does not impair an effect.
- TPP triphenyl phosphate
- tricresyl phosphate cresyl diphenyl phosphate
- dimethyl phthalate diethyl phthalate
- thermoplastic resin is not particularly limited, and examples thereof include polyester resins other than the ester resin of the present invention, polyester ether resins, acrylic resins, urethane resins, epoxy resins, toluene sulfonamide resins, and the like.
- the ultraviolet absorber is not particularly limited, and examples thereof include oxybenzophenone compounds, benzotriazole compounds, salicylic acid ester compounds, benzophenone compounds, cyanoacrylate compounds, and nickel complex compounds.
- the ultraviolet absorber is preferably used in the range of 0.01 to 2 parts by mass with respect to 100 parts by mass of the cellulose ester resin.
- the matting agent examples include silicon oxide, titanium oxide, aluminum oxide, calcium carbonate, calcium silicate, aluminum silicate, magnesium silicate, calcium phosphate, kaolin, talc and the like.
- the matting agent is preferably used in an amount of 0.1 to 0.3 parts by mass with respect to 100 parts by mass of the cellulose ester resin.
- the dye is not particularly limited in kind, blending amount, etc. as long as the object of the present invention is not impaired.
- the said optical film casts the resin solution obtained by melt
- the orientation of the cellulose ester resin in the film in the middle of molding can be suppressed, so that the obtained film can substantially exhibit optical isotropy.
- the film exhibiting optical isotropy can be used, for example, for an optical material such as a liquid crystal display, and is particularly useful as a protective film for a polarizing plate.
- corrugation is hard to be formed in the surface, and it is excellent also in surface smoothness.
- the cellulose ester resin composition is dissolved in an organic solvent, and the obtained resin solution is cast on a metal support in a first step, and in the cast resin solution.
- the second step consists of distilling off the organic solvent contained in the solution and drying to form a film, followed by the third step of peeling the film formed on the metal support from the metal support and drying by heating.
- the metal support used in the first step may be, for example, an endless belt-like or drum-like metal support, and for example, a stainless steel support whose surface is mirror-finished can be used. .
- the drying method in the second step is not particularly limited, but it is contained in the cast resin solution cast by applying wind of a temperature range of, for example, 30 to 50 ° C. to the upper surface and / or the lower surface of the metal support.
- the method includes evaporating 50 to 80% by mass of the organic solvent to form a film on the metal support.
- the third step is a step of peeling the film formed in the second step from the metal support and heating and drying under the temperature condition higher than that of the second step.
- the heating and drying method for example, a method in which the temperature is raised stepwise at a temperature condition of 100 to 160 ° C. is preferable because good dimensional stability can be obtained. By heating and drying under the above temperature conditions, the organic solvent remaining in the film after the second step can be almost completely removed.
- the organic solvent can be recovered and reused.
- the organic solvent that can be used when the resin composition is mixed with and dissolved in an organic solvent is not particularly limited as long as it can dissolve them, and for example, when using cellulose acetate as a cellulose ester, as a good solvent
- organic halogen compounds such as methylene chloride and dioxolanes.
- a poor solvent such as methanol, ethanol, 2-propanol, n-butanol, cyclohexane, cyclohexanone and the like together with the above-mentioned good solvent in order to improve the production efficiency of the film.
- the mixing ratio of the good solvent to the poor solvent is preferably in the range of 75/25 to 95/5 mass ratio of good solvent / poor solvent.
- the concentration of the cellulose ester resin in the resin solution is preferably 10 to 50% by mass, and more preferably 15 to 35% by mass.
- the unstretched optical film obtained by the above method is longitudinally uniaxially stretched in the mechanical flow direction and transverse uniaxial stretching in the direction orthogonal to the mechanical flow direction.
- a biaxially stretched stretched film can be obtained by stretching by a sequential biaxial stretching method of roll stretching and tenter stretching, a simultaneous biaxial stretching method by tenter stretching, a biaxial stretching method by tubular stretching, or the like.
- the stretching ratio is preferably 0.1% to 1000% in at least one direction, more preferably 0.2% to 600%, and 0.3% to 300%. Especially preferred. By designing in this range, a stretched optical film preferable in terms of birefringence, heat resistance and strength can be obtained.
- the optical film of the present invention is excellent in moisture permeation resistance, transparency, and storage stability, and thus can be used, for example, as an optical film of a liquid crystal display device.
- the optical film of the liquid crystal display device include a protective film for polarizing plate, a retardation film, a reflective film, a viewing angle improving film, an antiglare film, a nonreflective film, an antistatic film, a color filter and the like. Among them, it can be preferably used as a protective film for polarizing plate.
- the thickness of the optical film is preferably in the range of 20 to 120 ⁇ m, more preferably in the range of 25 to 100 ⁇ m, and particularly preferably in the range of 25 to 80 ⁇ m.
- a film thickness in the range of 25 to 80 ⁇ m is suitable for achieving thinning of a liquid crystal display device, and sufficient film strength and Rth stability Excellent performance such as moisture resistance can be maintained.
- the optical film of the present invention is characterized in that its storage stability is better than when no ester resin is blended.
- Cellulose ester resins are generally known to undergo hydrolysis in a moist heat environment.
- an additive for enhancing the moisture permeation resistance is to be used, but in the case of an ester resin other than the ester resin of the present invention, the ester resin itself may be hydrolyzed.
- the generated carboxylic acid such as acetic acid may accelerate the hydrolysis of the cellulose ester resin. Therefore, suppressing the hydrolysis resistance of the ester resin used as an additive leads to improving the storage stability in the obtained cellulose ester film.
- the optical film can be adjusted to a desired Rth without causing bleeding under high temperature and humidity, it can be widely used in various liquid crystal display methods depending on the application.
- liquid crystal display method examples include IPS (In-Plane Switching: In-Plane Switching), TN (Twisted Nematic: Twisted Nematic), VA (Vertically Aligned: Vertically Aligned), OCB (Optically Compensately Bend: Optically Compensatory Bend) etc. can be illustrated.
- IPS In-Plane Switching: In-Plane Switching
- TN Transmission Nematic: Twisted Nematic
- VA Vertically Aligned: Vertically Aligned
- OCB Optically Compensately Bend: Optically Compensatory Bend
- the optical film according to the present invention is a polarizing plate protective film for use in a display such as a liquid crystal display, plasma display, organic EL display, field emission display, rear projection television, etc. It can be suitably used as a wave plate, a viewing angle control film, a retardation film such as a liquid crystal optical compensation film, a display front plate or the like.
- the resin composition of the present invention is also applicable to waveguides, lenses, optical fibers, optical fiber substrates, coating materials, LED lenses, lens covers in the fields of optical communication systems, optical switching systems, and optical measurement systems. And so on.
- Example 1 In a 2 liter three-necked flask, 158 g of 90% neopentyl glycol (hereinafter abbreviated as "NPG") as a glycol component, 422 g of phthalic anhydride (hereinafter abbreviated as “PA”) as a dicarboxylic acid component, isononyl alcohol (as alcohol component)
- NPG 90% neopentyl glycol
- PA phthalic anhydride
- TIPT tetraisopropyl titanate
- ester resin (1) was a pale yellow liquid at normal temperature, and had an acid value of 0.2 and a number average molecular weight of 520.
- Example 2 In a 2-liter three-necked flask, 107.6 g of propylene glycol (hereinafter abbreviated as "PG") as a glycol component, 362 g of PA as a dicarboxylic acid component, 412 g of INA as an alcohol component, and 0.062 g of TIPT as a catalyst are introduced. Under the air flow, the temperature was gradually raised to 220 ° C. The condensation reaction was carried out at 220 ° C. for 8 hours, and it was confirmed that the acid value became 1.0 or less. The excess glycol was removed at 200 ° C. under reduced pressure to obtain an ester resin (2) of the present invention. The obtained ester resin (2) was a pale yellow liquid at normal temperature, and had an acid value of 0.2 and a number average molecular weight of 560.
- PG propylene glycol
- a dope solution was prepared by adding 100 parts of triacetylcellulose resin (“LT-35” manufactured by Daicel Co., Ltd.) and 10 parts of ester resin to a mixed solvent consisting of 810 parts of methylene chloride and 90 parts of methanol. The dope was cast on a glass plate to a thickness of 0.8 mm, dried at room temperature for 16 hours, and further dried at 50 ° C. for 30 minutes and further at 120 ° C. for 30 minutes. .
- Comparative Example 1 no ester resin was added, and in Comparative Example 2, a film was produced using the same amount of triphenyl phosphate instead of the ester resin.
- Comparative Example 3 is a commercially available triacetyl cellulose film 4UY (manufactured by Konica Minolta).
- ⁇ Wet heat test> The film was exposed to an environment of 85 ° C. and a relative humidity of 90% (under a moist heat environment) for 120 hours.
- HAZE> The HAZE value was measured according to JIS K 7105 using a turbidimeter ("NDH 5000" manufactured by Nippon Denshoku Industries Co., Ltd.). The closer the obtained value is to 0%, the more transparent it is.
- ⁇ Storage stability evaluation of cellulose ester resin film Place 1.2 g of the film in a 30 ml sample bottle and detect the amount of acetic acid generated by hydrolysis when it is present for 1000 hours under the conditions of 85 ° C ⁇ 90% humidity. It was measured. The smaller the amount of acetic acid generated, the better the storage stability.
- the acetic acid generation amount of the film obtained from the cellulose ester resin composition was significantly suppressed as compared with the comparative example, and the storage stability of the film was improved.
- the mass loss% after the moist heat test is small, and the compatibility with the cellulose ester resin is also high.
- the moisture permeability is also suppressed to be lower than that of the comparative example, and the stability improvement as the polarizing plate can be expected.
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Abstract
Description
B-(A-G)n-A-B (1)
〔式(1)中、Bは炭素原子数4~20の脂肪族モノアルコール残基であり、Gはアルキレングリコール残基、オキシアルキレングリコール残基又はアリールグリコール残基であり、Aはアルキレンジカルボン残基(A1)又はアリールジカルボン酸残基(A2)であって、アルキレンジカルボン酸残基(A1)とアリールジカルボン酸残基(A2)の合計(A1+A2)におけるアリールジカルボン酸残基(A2)の含有率が70~100モル%であり、nは繰り返し数であり、繰り返しごとにG、Aは同一でも異なっていてもよく、また複数あるA、Bは同一でも異なっていてもよい。〕
で表されるエステル樹脂であり、数平均分子量が350~1000であることを特徴とするエステル樹脂を提供するものである。
B-(A-G)n-A-B (1)
〔式(1)中、Bは炭素原子数4~20の脂肪族モノアルコール残基であり、Gはアルキレングリコール残基、オキシアルキレングリコール残基又はアリールグリコール残基であり、Aはアルキレンジカルボン残基(A1)又はアリールジカルボン酸残基(A2)であって、アルキレンジカルボン酸残基(A1)とアリールジカルボン酸残基(A2)の合計(A1+A2)におけるアリールジカルボン酸残基(A2)の含有率が70~100モル%であり、nは繰り返し数であり、繰り返しごとにG、Aは同一でも異なっていてもよく、また複数あるA、Bは同一でも異なっていてもよい。〕
で表されるエステル樹脂であり、数平均分子量が350~1000であることを特徴とするエステル樹脂であることを特徴とする。
[GPC測定条件]
測定装置:東ソー株式会社製高速GPC装置「HLC-8320GPC」
カラム:東ソー株式会社製「TSK GURDCOLUMN SuperHZ-L」+東ソー株式会社製「TSK gel SuperHZM-M」+東ソー株式会社製「TSK gel SuperHZM-M」+東ソー株式会社製「TSK gel SuperHZ-2000」+東ソー株式会社製「TSK gel SuperHZ-2000」
検出器:RI(示差屈折計)
データ処理:東ソー株式会社製「EcoSEC Data Analysis バージョン1.07」
カラム温度:40℃
展開溶媒:テトラヒドロフラン
流速:0.35mL/分
測定試料:試料7.5mgを10mlのテトラヒドロフランに溶解し、得られた溶液をマイクロフィルターでろ過したものを測定試料とした。
試料注入量:20μl
標準試料:前記「HLC-8320GPC」の測定マニュアルに準拠して、分子量が既知の下記の単分散ポリスチレンを用いた。
東ソー株式会社製「A-300」
東ソー株式会社製「A-500」
東ソー株式会社製「A-1000」
東ソー株式会社製「A-2500」
東ソー株式会社製「A-5000」
東ソー株式会社製「F-1」
東ソー株式会社製「F-2」
東ソー株式会社製「F-4」
東ソー株式会社製「F-10」
東ソー株式会社製「F-20」
東ソー株式会社製「F-40」
東ソー株式会社製「F-80」
東ソー株式会社製「F-128」
東ソー株式会社製「F-288」
2リットル3つ口フラスコに、グリコール成分として90%ネオペンチルグリコール(以下「NPG」と略す)158g、ジカルボン酸成分として無水フタル酸(以下「PA」と略す)422g、アルコール成分としてイソノニルアルコール(以下「INA」と略す)410g及び触媒であるテトライソプロピルチタネート(以下「TIPT」と略す)0.056gを仕込み、窒素導入管より窒素気流下、段階的に220℃まで昇温した。220℃で8時間縮合反応させ、酸価が1.0以下になったことを確認した。減圧下、200℃にて過剰のグリコールを除去することで本発明のエステル樹脂(1)を得た。得られたエステル樹脂(1)は、常温で淡黄色液体であり、酸価が0.2、数平均分子量は520であった。
2リットル3つ口フラスコに、グリコール成分としてプロピレングリコール(以下「PG」と略す)107.6g、ジカルボン酸成分としてPA362g、アルコール成分としてINA412g及び触媒であるTIPT0.062gを仕込み、窒素導入管より窒素気流下、段階的に220℃まで昇温した。220℃で8時間縮合反応させ、酸価が1.0以下になったことを確認した。減圧下、200℃にて過剰のグリコールを除去することで本発明のエステル樹脂(2)を得た。得られたエステル樹脂(2)は、常温で淡黄色液体であり、酸価が0.2、数平均分子量は560であった。
2リットル3つ口フラスコに、グリコール成分としてPG 383g、ジカルボン酸成分としてアジピン酸(以下AAと略す)381g、PA 129g、及びTIPT0.054gを仕込み、窒素導入管より窒素気流下、段階的に220℃まで昇温した。220℃で13時間縮合反応させ、酸価が1.0以下になったことを確認した。減圧下、140℃にて過剰のグリコールを除去することで比較対照用エステル樹脂(1’)を得た。得られたエステル樹脂(1’)は、常温で淡黄色液体であり、酸価が0.3であり、数平均分子量は760であった。
2リットル3つ口フラスコに、グリコール成分としてPG390g、ジカルボン酸成分としてAA658g、PA 222g、アルコール成分としてn-ブタノール(以下nBuOHと略す)253g及びTIPT0.091gを仕込み、窒素導入管より窒素気流下、段階的に220℃まで昇温した。220℃で13時間縮合反応させ、酸価が1.0以下になったことを確認した。減圧下、200℃にて過剰のグリコールを除去することで比較対照用エステル樹脂(2’)を得た。得られたエステル樹脂(2’)は、常温で淡黄色液体であり、酸価が0.2であり、数平均分子量は1230であった。
2リットル3つ口フラスコに、グリコール成分としてエチレングリコール(以下「EG」と略す)448g、ジカルボン酸成分としてAA812g、及びTIPT0.038gを仕込み、窒素導入管より窒素気流下、段階的に220℃まで昇温した。220℃で13時間縮合反応させ、酸価が1.0以下になったことを確認した。減圧下、200℃にて過剰のグリコールを除去することで比較対照用エステル樹脂(3’)を得た。得られたエステル樹脂(3’)は、常温で淡黄色液体であり、酸価が0.2であり、数平均分子量は1320であった。
2リットル3つ口フラスコに、グリコール成分としてEG93g、PG 114g、ジカルボン酸成分としてアジピン酸(以下AAと略す)601g、アルコール成分としてINA415g及びTIPT0.061gを仕込み、窒素導入管より窒素気流下、段階的に220℃まで昇温した。220℃で13時間縮合反応させ、酸価が1.0以下になったことを確認した。減圧下、200℃にて過剰のグリコールを除去することで比較対照用エステル樹脂(4’)を得た。得られたエステル樹脂(4’)は、常温で淡黄色液体であり、酸価が0.3であり、数平均分子量は1190であった。
トリアセチルセルロース樹脂(株式会社ダイセル製「LT-35」)100部、エステル樹脂10部を、メチレンクロライド810部及びメタノール90部からなる混合溶剤に加えて溶解し、ドープ液を調製した。このドープ液をガラス板上に厚さ0.8mmとなるように流延し、室温で16時間乾燥させた後、50℃で30分、さらに120℃で30分乾燥させることでフィルムを得た。尚、比較例1はエステル樹脂を添加せず、比較例2ではエステル樹脂の代わりにトリフェニルホスフェートを同量用いてフィルムを製造した。比較例3は市販トリアセチルセルロースフィルム4UY(コニカミノルタ製)である。
JIS Z 0208に記載の方法に従い、測定した。測定条件は、温度40℃、相対湿度90%で行なった。得られる値が小さい程、耐透湿性に優れることを表す。単位:g/m2・24h
フィルムを85℃、相対湿度90%の環境下(湿熱環境下)に120時間晒した。
HAZE値は、濁度計(日本電色工業株式会社製「NDH 5000」)を用いて、JIS K 7105に準じて測定した。得られる値が0%に近い程、透明であること表す。
4cm×4cm四方のフィルムで上述の湿熱試験行い、試験前後の質量を測定することで、試験後の質量減少率(%)を求めた。
フィルム1.2gを、30mlのサンプル瓶に入れ、85℃×湿度90%の条件下に1000時間存在させたときに加水分解により発生する酢酸量を検知菅(北川式ガス検知菅 酢酸用)で測定した。発生する酢酸量が少ないほど、保存安定性が優れることを示す。
Claims (9)
- 下記一般式(1)
B-(A-G)n-A-B (1)
〔式(1)中、Bは炭素原子数4~20の脂肪族モノアルコール残基であり、Gはアルキレングリコール残基、オキシアルキレングリコール残基又はアリールグリコール残基であり、Aはアルキレンジカルボン残基(A1)又はアリールジカルボン酸残基(A2)であって、アルキレンジカルボン酸残基(A1)とアリールジカルボン酸残基(A2)の合計(A1+A2)におけるアリールジカルボン酸残基(A2)の含有率が70~100モル%であり、nは繰り返し数であり、繰り返しごとにG、Aは同一でも異なっていてもよく、また複数あるA、Bは同一でも異なっていてもよい。〕
で表されるエステル樹脂であり、数平均分子量が350~1000であることを特徴とするエステル樹脂。 - 前記一般式(1)中のBが、炭素原子数6~12の脂肪族モノアルコール残基であり、Gが炭素原子数2~12のアルキレングリコール残基、炭素原子数4~12のオキシアルキレングリコール残基又は炭素数6~18のアリールグリコール残基であり、Aにおけるアルキレンジカルボン酸残基(A1)が炭素原子数2~12のアルキレンジカルボン酸残基であり、Aにおけるアリールジカルボン酸残基(A2)が炭素原子数6~12のアリールジカルボン酸残基であり、nの平均値が0.2~3である請求項1記載のエステル樹脂。
- 前記一般式(1)中のBがノニルアルコール残基又はイソノニルアルコール残基であり、Gがエチレングリコール、1,2-プロピレングリコール、1,3-プロパンジオール、1,2-ブタンジオール、1,3-ブタンジオール、2-メチル-1,3-プロパンジオール、及びネオペンチルグリコールからなる群から選ばれる1種以上の残基であり、A1がコハク酸、アジピン酸及びジカルボキシシクロヘキサンからなる群から選ばれる1種以上の残基であり、A2がフタル酸、テレフタル酸及びイソフタル酸からなる群から選ばれる1種以上の残基である請求項1又は2項記載のエステル樹脂。
- 前記一般式(1)中のAにおけるアルキレンジカルボン酸残基(A1)とアリールジカルボン酸残基(A2)の合計モル数(A1+A2)におけるアリールジカルボン酸残基(A2)の含有率が75~100モル%である請求項1~3の何れか1項記載のエステル樹脂。
- セルロースエステル樹脂の可塑化剤である請求項1~4のいずれか1記載のエステル樹脂。
- 請求項1~4の何れか1項記載のエステル樹脂とセルロースエステル樹脂とを含有することを特徴とするセルロースエステル樹脂組成物。
- 請求項6記載のセルロースエステル樹脂組成物を含有することを特徴とする光学フィルム。
- 偏光板保護用である請求項7記載の光学フィルム。
- 請求項7又は8の光学フィルムを有することを特徴とする液晶表示装置。
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TW201927850A (zh) | 2019-07-16 |
JP6628013B2 (ja) | 2020-01-08 |
CN111511797A (zh) | 2020-08-07 |
KR102649555B1 (ko) | 2024-03-21 |
KR20200092983A (ko) | 2020-08-04 |
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