WO2009144840A1 - ポリマーアロイの製造方法及びポリマーアロイ - Google Patents
ポリマーアロイの製造方法及びポリマーアロイ Download PDFInfo
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- WO2009144840A1 WO2009144840A1 PCT/JP2008/064880 JP2008064880W WO2009144840A1 WO 2009144840 A1 WO2009144840 A1 WO 2009144840A1 JP 2008064880 W JP2008064880 W JP 2008064880W WO 2009144840 A1 WO2009144840 A1 WO 2009144840A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/005—Processes for mixing polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/28—Treatment by wave energy or particle radiation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Definitions
- the present invention relates to a method for producing a polymer alloy that can be defoamed or molded while maintaining a fine phase separation structure. Moreover, it is related with the polymer alloy manufactured by the manufacturing method of this polymer alloy.
- a polymer alloy obtained by blending two or more kinds of polymers that are incompatible with each other in a normal state is attracting attention because it can exhibit properties that cannot be obtained with a single polymer.
- a polymer alloy reflecting the characteristics of each resin can be obtained.
- the moldability is good and the heat resistance is also good.
- An excellent polymer alloy can be produced.
- the production of the polymer alloy does not require a troublesome copolymerization operation unlike a copolymer such as a block copolymer or a random copolymer.
- Patent Document 1 two types of polymers are melted using a supercritical gas or a mixture of supercritical gases that are gases at normal temperature and pressure, and the viscosity of the molten polymer mixture is at least 10%. After thoroughly mixing for a sufficient amount of time until reduced, and then sufficiently cooling the molten mixture with sufficient time to continue mixing until the viscosity of the polymer molten mixture reaches at least the original value again, A method for producing a polymer alloy finely dispersed phase separation structure by rapidly depressurizing a mixing vessel is disclosed.
- Patent Document 2 discloses that two or more incompatible polymers are made compatible by changing a liquid solvent at room temperature and pressure to a fluid in a high temperature and high pressure state, and then the pressure is suddenly lowered to vaporize the solvent.
- a method for producing a polymer alloy having a fine phase separation structure of 100 nm or less is disclosed.
- the polymer alloy production methods described in the cited documents 1 and 2 vaporize a high-temperature and high-pressure fluid by abruptly depressurizing a supercritical gas or a mixture containing a supercritical gas in the production process. Since it has a cooling step by so-called adiabatic expansion, a large amount of bubbles were generated in the obtained polymer alloy.
- a defoaming step of kneading while heating to a high temperature is required.
- the defoaming step is performed, the fine phase separation structure of the polymer alloy may be destroyed. Further, even if defoaming can be performed while maintaining the fine phase separation structure, since the fine phase separation structure is destroyed when heated again for molding, the range of use has been very limited so far.
- Patent Document 3 discloses a defoaming step by rapidly cooling a supercritical gas or a mixture containing a supercritical gas to a glass transition temperature or lower without rapidly releasing pressure from a pressurized state in the production process.
- a method for producing a polymer alloy that is not required is disclosed.
- the fine phase separation structure may be destroyed, which is inconvenient for utilizing a polymer alloy having a fine phase separation structure. It was enough.
- JP-A-2-134214 Japanese Patent Laid-Open No. 10-330493 US Pat. No. 7,129,322
- An object of this invention is to provide the manufacturing method of the polymer alloy which can perform deaeration, shaping
- the present invention includes at least Step 1 of mixing two or more resins that are incompatible with each other at normal temperature and normal pressure and a solvent that is liquid or gaseous at normal temperature and normal pressure, and heating and pressurizing the solvent to increase the temperature.
- Step 2 of mixing in this state as a high-pressure fluid or supercritical fluid Step 3 of returning the mixture obtained in Step 2 to room temperature and normal pressure, and irradiating the mixture obtained in Step 3 with ionizing radiation
- the present inventors irradiate a polymer alloy formed by mixing two or more kinds of resins that are incompatible with each other at normal temperature and pressure in a high-temperature high-pressure fluid or supercritical fluid, with an appropriate amount of ionizing radiation.
- the fine phase separation structure becomes extremely stable, and even if a defoaming step in which kneading is performed while being heated to a high temperature or a severe heat treatment or kneading is performed for molding, the fine phase separation structure is obtained. Found that it is difficult to collapse.
- the fine phase separation structure of the polymer alloy is destroyed when the fluidity of the resin is increased by heating.
- radicals are generated in each resin constituting the polymer alloy, and a cross-linking reaction occurs between the resins, so that the fine phase separation structure is considered to be stable.
- the polymer alloy means a resin mixture having a phase separation structure in a mixed state in which each resin is uniformly dispersed as small resin domains, and preferably each resin domain is 10 ⁇ m or less (more It means a resin mixture having an ultrafine phase separation structure having a size of preferably 1 ⁇ m or less. Further, in the present specification, the polymer alloy includes a state in which the resin domain is extremely small and the resins are completely compatible.
- Step 1 two or more kinds of resins that are incompatible with each other at normal temperature and normal pressure and a solvent that is liquid or gaseous at normal temperature and normal pressure are mixed.
- the combination of resins used in the polymer alloy of the present invention is not particularly limited as long as they are incompatible or poorly compatible with each other.
- a combination of resins having greatly different polarities has been difficult to be made into a polymer alloy.
- a polymer alloy can be easily obtained.
- Examples of the combination of resins having different polarities include a case where the low polarity resin is a norbornene resin and the polar resin is polyvinyl alcohol.
- the structure of the resin used in the polymer alloy of the present invention may be linear or branched, or may have a bridge structure. Furthermore, the regularity may be any of isotactic, syndiotactic or attack tic.
- the resin may be a copolymer such as a block copolymer, a random copolymer, or a graft copolymer. Further, it may be an oligomer or a high molecular weight or ultrahigh molecular weight polymer.
- the resin to which the method for producing the polymer alloy of the present invention can be suitably applied is not particularly limited, but a resin having high deterioration resistance against ionizing radiation, that is, the main chain is hardly broken when irradiated with ionizing radiation.
- Resins are preferred.
- highly resistant resins include polyethylene, ethylene vinyl acetate copolymer, acrylonitrile styrene copolymer, acrylonitrile butadiene styrene copolymer, acrylic resin, polystyrene, ethylene vinyl alcohol copolymer, and methylpentene resin.
- degradation tolerance can also be improved by denature
- modification is not particularly limited as long as it is general.
- modification and acryloyl modification are more preferable.
- Examples of the solvent that is liquid at normal temperature and pressure include water and organic solvents.
- Examples of the organic solvent include hydrocarbon organic solvents, ether organic solvents, ester organic solvents, ketone organic solvents, alcohol organic solvents, dimethyl sulfoxide, and N, N-dimethylformamide.
- Examples of the hydrocarbon organic solvent include hexane, heptane, cyclohexane, toluene, and the like.
- Examples of the ether organic solvent include diethyl ether, dibutyl ether, tetrahydrofuran, dioxane and the like.
- Examples of the ester organic solvent include ethyl acetate and butyl acetate.
- Examples of the ketone organic solvent include acetone, methyl ethyl ketone, and methyl isobutyl ketone.
- Examples of the alcohol organic solvent include methanol, ethanol, isopropyl alcohol, and the like.
- gaseous solvent at normal temperature and pressure examples include N 2 , CO 2 , N 2 O, chlorofluorocarbon, hydrochlorofluorocarbon, low molecular weight alkane, low molecular weight alkene such as ethylene, ammonia and the like.
- chlorofluorocarbon examples include chlorodifluoromethane and dichlorotrifluoroethane.
- low molecular weight alkane examples include n-butane, propane, ethane and the like.
- a solvent that is liquid at a normal temperature of 25 ° C. and a normal pressure of 0.1 MPa and that has a critical temperature and a critical pressure is preferable. If the solvent is gaseous at normal temperature and normal pressure, it is necessary to gradually adjust the pressure so that it does not foam by releasing the pressure, but if the solvent is liquid at normal temperature and normal pressure, the internal pressure in the mixing vessel is almost constant at the time of pressure release. There is no risk of foaming. These may be used alone or in combination of two or more. Especially, when the thermoplastic norbornene-type resin mentioned later is included as one of 2 or more types of incompatible resin, it is preferable to use water as a solvent.
- thermoplastic norbornene-based resin that is practically soluble only in cyclohexane under a normal temperature and normal pressure environment can be sufficiently dissolved in water that has become a high-temperature high-pressure fluid or a supercritical fluid and has reduced polarity.
- the thermoplastic norbornene resin does not dissolve in water and is easy to take out and easy to handle.
- alcohol is also used suitably without causing thermal decomposition because the alcohol also becomes a high temperature / high pressure state or a supercritical state at a relatively low temperature.
- the solvent preferably occupies a volume sufficient to stir the resin. That is, the volume of the solvent that is liquid at normal temperature and normal pressure is preferably at least one times the total volume of two or more resins that are incompatible with each other at normal temperature and normal pressure.
- the viscosity of the solvent in the high-temperature and high-pressure state or the supercritical state is high and can be higher than that of the resin. Therefore, even a resin which has a high viscosity in normal mixing and is difficult to mix can be mixed with another resin by stirring with a solvent having a high viscosity in a high temperature / high pressure state or a supercritical state.
- a compatibilizer may be added to the said solvent as needed.
- the compatibilizer include an oligomer or a polymer in which a segment capable of being compatible with each resin to form a polymer alloy is present.
- the compatibilizer is a polymer, any of a random polymer, a block polymer, and a graft polymer may be used.
- the function as a compatibilizer can also be given by adding modification
- a compatibilizing agent include maleic acid-modified polypropylene, carboxylic acid-modified polypropylene, amino group-terminated nitrile butadiene rubber, carboxylic acid-modified polyethylene, chlorinated polyethylene, sulfonated polystyrene, hydroxyl-terminated polyolefin, hydroxyl-terminated polybutadiene, malein.
- examples include acid-modified ethylene butylene rubber and ethylene / acrylic acid copolymer.
- polymers that are effective as graft type polymer compatibilizers include polyolefins in which vinyl polymers are grafted on side chains, polycarbonates in which vinyl polymers are grafted on side chains, and the like.
- examples of commercially available compatibilizers include “Modiper” (manufactured by NOF Corporation) and “Admer” (manufactured by Mitsui Chemicals).
- Step 2 is performed in which the solvent is heated and pressurized to form a high-temperature high-pressure fluid or a supercritical fluid, and mixing is performed in this state.
- the preferable lower limit of the temperature of the high-temperature high-pressure fluid or supercritical fluid is 100 ° C.
- the preferable upper limit is 700 ° C. If the temperature of the high-temperature high-pressure fluid or supercritical fluid is less than 100 ° C, the formation of the ultrafine phase separation structure of the resulting polymer alloy may be insufficient. If the temperature exceeds 700 ° C, the resin will decompose. In addition, the energy required to raise the temperature is very large and the energy loss increases, which may increase the cost and may not be economical.
- a more preferable upper limit of the temperature of the high-temperature high-pressure fluid or supercritical fluid is 400 ° C.
- the preferable lower limit of the pressure of the high-temperature high-pressure fluid or supercritical fluid is 0.5 MPa, and the preferable upper limit is 100 MPa. If the pressure of the high-temperature high-pressure fluid or supercritical fluid is less than 0.5 MPa, the formation of the ultrafine phase separation structure may be insufficient, and if it exceeds 100 MPa, it is necessary to increase the pressure. Energy is so large that it is expensive and not economical.
- a more preferable upper limit of the pressure of the high-temperature high-pressure fluid or supercritical fluid is 60 MPa.
- the treatment time for mixing the resin in a high temperature / high pressure state or a supercritical state is preferably a short time. If the mixing time is short, decomposition of the resin can be suppressed. In addition, when mixing time becomes long, resin obtained may decompose
- the preferred mixing time varies depending on the treatment temperature, but it is within 30 minutes at 400 ° C. or higher, more preferably within 20 minutes, further preferably within 10 minutes, and within 400 hours at 1 hour, more preferably within 30 minutes. .
- the time required to reach a high temperature / high pressure state or a supercritical state is also short. If it is a short time, decomposition
- Examples of a method for reaching a high temperature and high pressure state or a supercritical state in a short time include a method in which a mixed resin is preheated in a normal pressure environment in advance.
- the size of the phase-separated domain particles of the polymer alloy obtained by arbitrarily setting the temperature and pressure in the production container before or at the beginning of mixing can be adjusted. it can.
- Step 3 is performed in which the mixture obtained in Step 2 is returned to normal temperature and pressure.
- the high-temperature high-pressure fluid or supercritical fluid may be decompressed and cooled by endothermic expansion by adiabatic expansion, or may be rapidly cooled to below the glass transition temperature without being decompressed.
- the resulting polymer alloy When rapidly cooled to below the glass transition temperature without releasing the pressure, the resulting polymer alloy contains almost no bubbles, and the subsequent defoaming step becomes unnecessary. However, it is not suitable for continuous production, and it is difficult to industrially produce a large amount of polymer alloy.
- the rate of temperature decrease from the production temperature to the glass transition temperature is 25 ° C./min or more. If the temperature is less than 25 ° C./min, the resin may be deteriorated because it is exposed to a high temperature for an extremely long time.
- the temperature lowering rate is more preferably 50 ° C./min or more.
- the glass transition temperature of the resin showing the lowest glass transition temperature may be quenched immediately, or the rapid cooling may be repeated step by step to the glass transition temperature of each resin. Good.
- the glass transition temperature of the resin is room temperature or lower, the phase structure can be maintained to some extent if it is rapidly cooled to at least room temperature.
- FIG. 1 An example of a production apparatus used in steps 1 to 3 in the method for producing a polymer alloy of the present invention is shown in FIG.
- the production container 1 is submerged in the metal salt 3, the metal salt 3 is heated and melted by the heater 2, and the temperature is controlled by the thermocouple 4.
- a metal salt molten bath is used as a heating means, but other heating means such as an electric heater, a burner, a combustion gas, steam, a heat medium, and a sand bath can be used. .
- the production container 1 since the production is performed even under severe conditions in the supercritical region or near the supercritical region, a material and a thickness that can withstand this condition are used.
- the material of the production container 1 include, for example, carbon steel, special steels such as Ni, Cr, V, and Mo, austenitic stainless steel, hastelloy, titanium, or those obtained by lining glass, ceramic, carbide, etc., What clad other metals is mentioned.
- a hard ball made of metal, ceramic or the like or an obstacle of a predetermined shape it is preferable to place a hard ball made of metal, ceramic or the like or an obstacle of a predetermined shape in the production container 1 to generate turbulent flow. If a hard ball is provided in the production container 1, a turbulent flow is generated by shaking, so that the stirring efficiency is increased and the reaction efficiency can be increased. Furthermore, it is preferable that the production container 1 is filled with hard balls or the like because the stirring efficiency is increased simply by shaking the container.
- the filling rate of the hard pole is preferably 20 to 80%. When it is out of this range, the stirring efficiency becomes worse. It is preferable to use two or more kinds of hard balls having different diameters. A filling rate can be improved and stirring efficiency can be raised.
- a plate having an orifice is provided in the manufacturing container 1. If a plate having an orifice is provided in the production container 1, a turbulent flow is generated by shaking, so that the stirring efficiency is increased and the reaction efficiency can be increased.
- the production container 1 As a method for producing the polymer alloy of the present invention using the production apparatus shown in FIG. 1, for example, two or more incompatible resins and a solvent are put into the production container 1 and sufficiently sealed, By putting it in the metal salt melting bath 5, the solvent is heated and pressurized to be a high-temperature high-pressure fluid or supercritical fluid. After maintaining in this state for a predetermined time to make the above two or more kinds of resins compatible, the production container 1 is quickly put into a cooling bath and rapidly cooled. A method of taking out the polymer alloy produced in the production container 1 after sufficiently cooling is mentioned.
- FIG. 2 shows another example of the production apparatus used in steps 1 to 3 in the method for producing a polymer alloy of the present invention.
- the raw resin is supplied from an extruder 6 and a syringe feeder 7, respectively.
- the supplied resin is heated and melt-mixed by the sheath heater 8.
- a fluid that can be a high-temperature high-pressure fluid or a supercritical fluid is heated in the metal salt molten bath 10 by the metering pump 9.
- the heated fluid becomes a high-temperature high-pressure fluid or a supercritical fluid.
- the molten mixed resin and the high-temperature fluid are mixed and kept in the electric furnace 11.
- the mixed resin becomes a polymer alloy before reaching the cooler 12.
- the fluid cooled by the cooler 12 is not a high-temperature high-pressure fluid or a supercritical fluid.
- the obtained polymer alloy is stored in a recovery tank 14 provided with a back pressure adjusting valve 13 together with a fluid.
- Step 4 is performed in which the mixture obtained in Step 3 is irradiated with ionizing radiation.
- the formed polymer alloy fine phase-separated structure becomes extremely stable, followed by a defoaming step of kneading while heating to a high temperature, Even if heat treatment or kneading is performed, the polymer alloy fine phase-separated structure is unlikely to collapse.
- the ionizing radiation means a high-energy electromagnetic wave or particle beam having a property of inducing ionization from atoms.
- electron beams, X-rays, ⁇ -rays, neutron beams, high-energy ions, etc. alone or mixed radiation thereof can be used.
- Specific examples of the ionizing radiation irradiation include a method of irradiation using an electron beam irradiation apparatus manufactured by NHV Corporation.
- the irradiation amount of the ionizing radiation is extremely important. That is, when the irradiation dose of ionizing radiation is small, a sufficient effect of stabilizing the polymer alloy fine phase separation structure cannot be obtained. When the irradiation dose of ionizing radiation is large, crosslinking proceeds too much, and fluidity cannot be obtained even when heated, making it impossible to mold. Furthermore, when a large amount of ionizing radiation is irradiated, the main chain of the resin constituting the polymer alloy is broken and deteriorated.
- the tan ⁇ value of the viscoelasticity measured at a high temperature of 20 ° C. from the highest flow temperature observed by differential scanning calorimetry (DSC) measurement for the polymer alloy is a strain amount of 0.1%, It is preferable to irradiate to the extent that there is no change in the size of the phase structure even after heating to above the highest flow temperature and cooling down under conditions of a frequency of 10 Hz.
- the tan ⁇ value is 1 or more, the resulting polymer alloy is excellent in fluidity during heating and can be easily thermoformed.
- the highest flow temperature observed by the DSC measurement is DSC, the temperature is lowered from room temperature to ⁇ 50 ° C. at 10 ° C./min, maintained at ⁇ 50 ° C. for 5 minutes, and then ⁇ Among the endothermic peaks observed when the temperature is increased from 50 ° C. to the resin decomposition temperature at 10 ° C./min, it means the highest temperature peak excluding the resin decomposition peak.
- the viscoelasticity measurement method is not particularly limited as long as it is a general measurement method, and examples thereof include a shear measurement mode, a stretch measurement mode, and a compression measurement mode. In particular, a shear measurement mode using a resin sheet of about 1 mm is preferable because errors due to boundary conditions are unlikely to occur.
- the specific dose of the ionizing radiation depends on the type of resin used.
- the preferable lower limit of the ionizing radiation dose is 2 Mrad
- the preferable upper limit is 10 Mrad. If the irradiation dose of ionizing radiation is less than 2 Mrad, sufficient stabilizing effect of the polymer alloy fine phase separation structure cannot be obtained, and if it exceeds 10 Mrad, fluidity cannot be obtained even when heated and molding becomes impossible. .
- the mixture obtained in the step 3 is preliminarily molded into a plate-like body having a thickness of about 0.01 to 30 mm and then irradiated with ionizing radiation.
- ionizing radiation By irradiating with ionizing radiation after forming a plate-like body, it becomes possible to uniformly irradiate the resin with ionizing radiation.
- the polymer alloy obtained by the method for producing a polymer alloy of the present invention has a very stable fine phase separation structure, and the fine phase separation structure does not collapse even after a defoaming process or a thermoforming process. Therefore, it is possible to obtain a molded article with extremely high transparency while maintaining the performance as a polymer alloy.
- a polymer alloy obtained by using the method for producing a polymer alloy of the present invention is also one aspect of the present invention.
- the phase transition phenomenon when the phase transition phenomenon is observed using a differential calorimeter, at least the phase transition phenomenon for any of the two or more types of resins used disappears, or The phase transition phenomenon is observed at a temperature different from the temperature at which the phase transition phenomenon of each resin occurs. This indicates that the polymer alloy has an ultrafine phase separation structure.
- a polymer alloy has an ultrafine phase separation structure
- the polymer alloy has an ultra-fine phase separation structure
- it can be observed that the respective resins are in a mixed state in which they are uniformly dispersed as small resin domains.
- the phase transition temperature of each resin is measured in advance using a differential calorimeter, and then the polymer alloy is obtained by measuring the phase transition temperature of the polymer alloy obtained using these resins.
- phase separation structure is taken. That is, when they are completely dissolved in each other, or when each resin is in a dispersed state in which the respective resins are uniformly dispersed as very small resin domains, the phase transition temperature is single. Become. Therefore, the phase transition phenomenon of any of the observed resins disappears and is not observed even when the phase transition start temperature is reached, or a new temperature is newly established at a temperature different from the previously observed phase transition phenomenon of each resin. If a phase transition start temperature causing a phase transition phenomenon is observed, it can be estimated that a polymer alloy is formed.
- the size of the resin domain can be calculated by Guinier's equation represented by the following equation by performing small-angle X-ray scattering measurement on the polymer alloy, measuring the angle dependency of the scattering intensity.
- ln (I (s)) ln (I (0)) - s 2 ⁇ Rg 2/3
- Rg represents the domain size
- I (0) represents the scattering intensity at a scattering angle of 0.
- the resin having excellent transparency is not particularly limited, and examples thereof include thermoplastic norbornene resins, polymethyl methacrylate, polystyrene, polycarbonate, and polyester. Further, when the refractive indexes of the respective resins are close, it is preferable because transparency is easily realized. In addition, some optical applications require a low refractive index, but for such applications, low refractive index resins such as thermoplastic norbornene resins, polymethyl methacrylate, and polystyrene are suitable. .
- the polymer alloy of the present invention obtained for the purpose of optical use is excellent in transparency, heat resistance, low hygroscopicity, low birefringence, moldability and the like.
- Lenses such as video camera lenses, telescope lenses, eyeglass lenses, laser beam lenses, optical video disks, audio disks, document file disks, optical disks such as memory disks, optical materials such as optical fibers, image receiving transfer sheets, It can be widely used for various applications such as various electronic device housings, window glass, printed circuit boards, sealing agents, binders of inorganic or organic compounds, mainly for optical applications such as various films and sheets.
- thermoplastic norbornene resin is not particularly limited.
- Examples of the norbornene monomer used as the raw material for the thermoplastic norbornene resin are described in JP-A-5-39403, JP-A-5-212828, JP3038825, JP3019741, JP3030953, and the like.
- norbornene methanooctahydronaphthalene, dimethanooctahydronaphthalene, dimethanododecahydroanthracene, dimethanodecahydroanthracene, trimethanododecahydroanthracene, or a substituted form thereof
- Pentadiene 2,3-dihydrocyclopentadiene
- methanooctahydrobenzoindene dimethanooctahydrobenzoindene, methanodecahydrobenzoindene, dimethanodecahydrobenzoindene, methanooctahydrofur Ren
- these norbornene-type monomers may be used independently and may use 2 or more types together.
- the substituent in the above substituent is not particularly limited, and a conventionally known hydrocarbon group or polar group can be used.
- a conventionally known hydrocarbon group or polar group can be used.
- substituents examples include 5-methyl-2-norbornene, 5,5-dimethyl-2-norbornene, 5-ethyl-2-norbornene, 5-butyl-2-norbornene, 5-ethylidene-2-norbornene, 5-methoxycarbonyl-2-norbornene, 5-cyano-2-norbornene, 5-methyl-5-methoxycarbonyl-2-norbornene, 5-phenyl-2-norbornene, 5-phenyl-5-methyl-2-norbornene, etc. Is mentioned.
- the number average molecular weight of the thermoplastic norbornene-based resin is not particularly limited, but is usually preferably 5000 to 200,000. If it is less than 5,000, the mechanical strength of a molded product (particularly an optical film) produced from the polymer alloy of the present invention may be insufficient, and if it exceeds 200,000, the moldability may be deteriorated. More preferably, it is 7000 to 35000, and still more preferably 8000 to 30,000.
- the number average molecular weight of the thermoplastic norbornene resin can be measured by gel permeation chromatography (GPC).
- the thermoplastic norbornene resin used in the present invention may be either a resin having a polar group or a resin having no polar group.
- the polar group may exist within a range that does not impair the optical properties, moldability, etc. Rather, the presence of the polar group is necessary in order to give an appropriate moisture permeability to the molded product. Is preferred.
- a polar group is not particularly limited, and examples thereof include a halogen group (chlorine group, bromine group, fluorine group), hydroxyl group, carboxylic acid group, ester group, amino group, hydroxyl group-free, cyano group, silyl group, and epoxy group. , Acryl group, methacryl group, silanol group and the like. Of these, ester groups and hydroxyl-free groups that can be rendered reactive by deprotection are preferred.
- thermoplastic norbornene resins commercially available products include, for example, “Arton” (manufactured by JSR) as a resin having a polar group, and “Zeonor” (manufactured by Zeon Corporation) as a resin having no polar group. ) And the like.
- thermoplastic norbornene-based resin when used, it is not particularly limited as an incompatible resin for forming a polymer alloy in combination with this, but for example, polyethylene, polypropylene, ethylene and ⁇ -olefin Copolymers, ethylene / (meth) acrylic acid ester copolymers such as ethylene / vinyl acetate copolymers, ethylene / ethyl acrylate copolymers or ethylene / (meth) acrylic acid copolymers, polyolefin resins such as polybutadiene , Poly (meth) acrylates such as polymethyl methacrylate, polybutyl acrylate, polycarbonate, polyvinyl acetate, polyamide, polyacetal, polyphenylene ether, ionomer, polyvinyl chloride, polyimide, polyester, polyethylene Side, polyarylate, ABS resin, fluoroplastic, polyvinylidene fluoride, polyvinylidene
- amorphous resins such as polymethyl methacrylate, polycarbonate, polysulfone, triacetyl cellulose, and polyvinyl alcohol, low crystalline resins, and crystallinity. Even if it is resin, resin with a small crystal size is used suitably.
- the transparent resin and the incompatible resin form an ultrafine separation structure of 100 nm or less. If the phase separation structure exceeds 100 nm, the transparency, haze, etc. may be reduced, making it unsuitable for optical applications. Moreover, moisture permeability can also be provided to thermoplastic norbornene-type resin by mixing highly moisture-permeable resin and setting it as an ultrafine separation structure of 100 nm or less.
- the blending ratio of two or more types of resins that are incompatible at room temperature and normal pressure is 0% of the resin incompatible with the base resin with respect to 100 parts by weight of the base resin. It is preferable to add 0.01 to 100 parts by weight.
- the amount of the resin that is incompatible with the base resin is more preferably 0.01 to 15 parts by weight, still more preferably 3 to 10 parts by weight.
- the resulting polymer alloy has heat resistance and moldability.
- the glass transition temperature drop caused by the blending with the thermoplastic norbornene resin is within a range that can be maintained within 30 ° C.
- the glass transition temperature is lowered below 30 ° C., the heat resistance inherent to the thermoplastic norbornene-based resin is impaired, and the use range of the optical film or the like may be greatly limited.
- known additives such as an antioxidant, an ultraviolet absorber, a lubricant, and an antistatic agent can be blended within a range that does not impair the object of the present invention.
- the antioxidant include 2,6-di-t-butyl-4-methylphenol, 2,2′-dioxy-3,3′-di-t-butyl-5,5′-dimethyldiphenylmethane, And tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane.
- the ultraviolet absorber include 2,4-dihydroxybenzophenone and 2-hydroxy-4-methoxybenzophenone.
- the polymer alloy of the present invention contains the thermoplastic norbornene-based resin, since it is excellent in transparency, heat resistance, low moisture absorption, low birefringence, moldability, etc., taking advantage of its characteristics, for example, Lenses for general camera lenses, video camera lenses, telescope lenses, eyeglass lenses, laser beam lenses, optical video disks, audio disks, document file disks, optical disks such as memory disks, optical materials such as optical fibers, Mainly for optical applications such as image-receiving transfer sheets, various films, sheets, etc. In addition, it can be widely used for various applications such as various electronic device housings, window glass, printed boards, sealants, inorganic or organic compound binders, etc. .
- a molded article using the polymer alloy of the present invention and a transparent molded article are also one aspect of the present invention.
- a molded article using the polymer alloy of the present invention can be produced by using known molding means, for example, molding means such as extrusion molding, injection molding, compression molding, blow molding, and calendar molding.
- an inorganic compound such as a silane coupling agent, an acrylic resin, a vinyl resin, a melanin resin, an epoxy resin, a fluorine resin, a silicone resin
- You may form the hard-coat layer which consists of etc.
- the heat resistance, optical characteristics, chemical resistance, wear resistance, moisture permeability, and the like of the molded product can be improved.
- the means for forming the hard coat layer include known methods such as thermal curing, ultraviolet curing, vacuum deposition, sputtering, and ion plating.
- the polymer alloy of the present invention contains a thermoplastic norbornene-based resin as a constituent component, taking advantage of its excellent moldability and heat resistance, especially for optical films such as retardation films and polarizing plate protective films. Suitable.
- the optical film of the present invention preferably has a tear strength of 0.1 N or more. If it is less than 0.1 N, the range of use as an optical film may be limited, and this tendency is particularly noticeable in the case of a thin film of 10 ⁇ m or less.
- the optical film of the present invention preferably has a total light transmittance of 60% or more. If it is less than 60%, the range of use as an optical film may be limited. More preferably, it is 70% or more, More preferably, it is 80% or more.
- the optical film of the present invention preferably has a haze of 20% or less. If it is less than 20%, the range of use as an optical film may be limited.
- the optical film of the present invention can be produced, for example, by an extrusion molding method, a press molding method, or the like.
- the thickness of the optical film of the present invention is usually 10 to 300 ⁇ m.
- the polymer alloy obtained by the method for producing a polymer alloy of the present invention can exhibit the properties of other resins without impairing the excellent properties of the base resin, and is melted again after the formation of the polymer alloy. Since the fine phase separation structure of the polymer alloy is maintained even through a heating process such as molding or high-temperature defoaming treatment, a molded product having excellent performance can be obtained.
- the manufacturing method of the polymer alloy which can perform a defoaming, a shaping
- the polymer alloy manufactured by the manufacturing method of this polymer alloy can be provided.
- Example 1 A predetermined solvent and a thermoplastic norbornene resin (manufactured by ZEON) according to the formulation shown in Table 1 are added to the batch-type production container 1 shown in FIG. 1 (tubular container, manufactured by SUS316, Tube Bomb Reactor, internal volume 100 cc). A predetermined amount of “Zeonor 1600”) and polyvinyl alcohol (PVA, “Kuraray Poval CP-1000” manufactured by Kuraray Co., Ltd.) were added, and the inside of the production container was sufficiently purged with nitrogen.
- ZEON thermoplastic norbornene resin
- the production container 1 was submerged in a metal salt molten bath 5 (manufactured by Shin-Nippon Chemical Co., Ltd.) equipped with a micro heater 2 (manufactured by Sukegawa Electric Industry Co., Ltd.) and treated at the temperature and pressure shown in Table 1 for a predetermined time. Thereafter, the production container 1 was rapidly cooled with a cooling bath, and then the polymer alloy obtained after ice cooling was taken out and dried.
- a metal salt molten bath 5 manufactured by Shin-Nippon Chemical Co., Ltd.
- a micro heater 2 manufactured by Sukegawa Electric Industry Co., Ltd.
- the dried polymer alloy was molded by hot pressing at 185 ° C. for 2 minutes to obtain a sheet-like body having a thickness of about 0.8 mm.
- the obtained sheet was irradiated with an electron beam having an acceleration voltage of 500 kV in a nitrogen atmosphere using an electron beam irradiation apparatus (manufactured by NHV Corporation) in the dose shown in Table 1.
- the sheet was then molded by hot pressing at 220 ° C. for 10 minutes to obtain a film having a thickness of about 55 ⁇ m.
- Example 2 Comparative Example 2 A film was obtained in the same manner as in Example 1 except that the electron beam dose was as shown in Table 1.
- Example 1 The dried polymer alloy obtained by the same method as in Example 1 was molded by hot pressing at 220 ° C. for 10 minutes without subjecting to electron beam treatment to obtain a film having a thickness of about 55 ⁇ m.
- the glass transition temperature (melting point) at the time of temperature increase was determined using a DSC2920 Modulated DSC manufactured by TA Instruments under the following temperature program conditions. . The temperature was lowered from room temperature to ⁇ 50 ° C. at 10 ° C./min, maintained at ⁇ 50 ° C. for 5 minutes, and then increased from ⁇ 50 ° C. to 280 ° C. at 10 ° C./min.
- the obtained film was cut into a length of about 45 mm and a width of 5 mm, and the sample was set at a distance of 36 mm between chucks using RSA-2 manufactured by Reometrics, and the stretch measurement mode (strain amount 0.1%, frequency 10 Hz) was set. Then, temperature dispersion measurement was performed from room temperature to 220 ° C. at a temperature rising rate of 5 ° C./min. Among the obtained tan ⁇ values, the tan ⁇ value at a high temperature of 20 ° C. was read from the highest known flow temperature by DSC measurement.
- phase structure size change The phase separation structure was observed using a transmission electron microscope. The case where no change was observed in the size of the phase structure before and after 220 ° C. and 10 minutes of hot pressing was evaluated as “ ⁇ ”, and the case where the size was increased by 5 times or more was evaluated as “X”.
- FIG. 3 an electron micrograph of the phase structure before hot pressing at 220 ° C. for 10 minutes in Example 1 is shown in FIG. 3, and an electron micrograph of the phase structure after hot pressing is shown in FIG.
- FIG. 5 shows an electron micrograph of the phase structure before hot pressing at 220 ° C. for 10 minutes in Comparative Example 1
- FIG. 6 shows an electron micrograph of the phase structure after hot pressing.
- Total light transmittance It measured based on JISK7150 using the haze meter (The Tokyo Denshoku make, HCIIIDPK). If the film could not be molded, it was evaluated as “-”.
- Example 5 In the batch production container 1 shown in FIG. 1 (tubular container, manufactured by SUS316, Tube Bomb Reactor, internal volume 100 cc), a predetermined solvent and a thermoplastic norbornene resin (manufactured by ZEON) according to the composition shown in Table 2 A predetermined amount of “Zeonor 1600”) and polyvinyl alcohol (PVA, “Kuraray Poval CP-1000” manufactured by Kuraray Co., Ltd.) were added, and the inside of the production container was sufficiently purged with nitrogen.
- ZEON thermoplastic norbornene resin
- the production container 1 was submerged in a metal salt molten bath 5 (manufactured by Shin-Nippon Chemical Co., Ltd.) equipped with a micro heater 2 (manufactured by Sukegawa Electric Industry Co., Ltd.) and treated at the temperature and pressure shown in Table 2 for a predetermined time. Thereafter, the production container 1 was decompressed and the resulting polymer alloy was taken out and dried.
- a metal salt molten bath 5 manufactured by Shin-Nippon Chemical Co., Ltd.
- a micro heater 2 manufactured by Sukegawa Electric Industry Co., Ltd.
- the dried polymer alloy was molded by hot pressing at 185 ° C. for 2 minutes to obtain a foamed sheet having a thickness of about 0.8 mm.
- the obtained foamed sheet was sufficiently substituted with nitrogen, and then an electron beam with an acceleration voltage of 500 kV was irradiated in a nitrogen atmosphere using an electron beam irradiation apparatus (manufactured by NHV Corporation) in the dose shown in Table 1.
- the polymer alloy after the electron beam irradiation was subjected to defoaming treatment by kneading at 230 ° C. using a plastomill (manufactured by Toyo Seiki Co., Ltd., LABO PLASTOMILLE MODEL 100C100).
- the polymer alloy after the defoaming treatment was molded by hot pressing at 220 ° C. for 10 minutes to obtain a film having a thickness of about 55 ⁇ m.
- Example 5 (Examples 6 to 8, Comparative Example 5) A film was obtained in the same manner as in Example 5 except that the electron beam dose was as shown in Table 2.
- Example 3 The dried polymer alloy obtained by the same method as in Example 5 was molded by hot pressing at 220 ° C. for 10 minutes without subjecting to electron beam treatment to obtain a film having a thickness of about 55 ⁇ m.
- Example 4 By kneading the polymer alloy after drying obtained by the same method as in Example 5 at 230 ° C. using a plast mill (manufactured by Toyo Seiki, LABO PLASTOMILL MODEL 100C100) without performing electron beam treatment. Defoamed. The polymer alloy after the defoaming treatment was molded by hot pressing at 220 ° C. for 10 minutes to obtain a film having a thickness of about 55 ⁇ m.
- Example 9 A predetermined solvent and a thermoplastic norbornene resin (manufactured by ZEON) according to the formulation shown in Table 3 are added to the batch-type production container 1 shown in FIG. 1 (tubular container, manufactured by SUS316, Tube Bomb Reactor, internal volume 100 cc). A predetermined amount of “Zeonor 1600”) and polyvinyl alcohol (PVA, “Kuraray Poval CP-1000” manufactured by Kuraray Co., Ltd.) were added, and the inside of the production container was sufficiently purged with nitrogen.
- ZEON thermoplastic norbornene resin
- the production container 1 was submerged in a metal salt molten bath 5 (manufactured by Nippon Steel Chemical Co., Ltd.) equipped with a micro heater 2 (manufactured by Sukegawa Electric Industry Co., Ltd.) and treated at a temperature and pressure shown in Table 3 for a predetermined time. Thereafter, the production container 1 was rapidly cooled with a cooling bath, and then the polymer alloy obtained after ice cooling was taken out and dried.
- a metal salt molten bath 5 manufactured by Nippon Steel Chemical Co., Ltd.
- a micro heater 2 manufactured by Sukegawa Electric Industry Co., Ltd.
- the dried polymer alloy was molded by hot pressing at 185 ° C. for 2 minutes to obtain a sheet-like body having a thickness of about 0.8 mm.
- the obtained sheet was irradiated with an electron beam having an acceleration voltage of 500 kV in a nitrogen atmosphere using an electron beam irradiation apparatus (manufactured by NHV Corporation) in the dose shown in Table 2.
- the sheet was then molded by hot pressing at 220 ° C. for 10 minutes to obtain a film having a thickness of about 55 ⁇ m.
- Example 6 The dried polymer alloy obtained by the same method as in Example 1 was molded by hot pressing at 220 ° C. for 10 minutes without subjecting to electron beam treatment to obtain a film having a thickness of about 55 ⁇ m.
- This resin kneading part was set to the temperature and resin pressure shown in Table 3, and immediately after extrusion from the mold part, it was formed into a sheet with a cooling roll, and then the obtained polymer alloy was dried to form a sheet having a thickness of about 0.8 mm. I got a thing.
- the mixing time shown in Table 3 is a value obtained by calculation of the time required from the introduction of the raw material resin to the extrusion from the mold part.
- the dried polymer alloy sheet was irradiated with an electron beam with an acceleration voltage of 500 kV in a nitrogen atmosphere using an electron beam irradiation apparatus (manufactured by NHV Corporation) in the dose shown in Table 2.
- the polymer alloy after the electron beam irradiation was subjected to defoaming treatment by kneading at 230 ° C. using a plastomill (manufactured by Toyo Seiki Co., Ltd., LABO PLASTOMILLE MODEL 100C100).
- the polymer alloy after the defoaming treatment was molded by hot pressing at 220 ° C. for 10 minutes to obtain a film having a thickness of about 55 ⁇ m.
- Example 13 to 16 A predetermined solvent and a thermoplastic norbornene resin (manufactured by ZEON) according to the blending composition shown in Table 4 are added to the batch-type production container 1 (tube container, manufactured by SUS316, Tube Bomb Reactor, internal volume 100 cc) shown in FIG.
- ZONOR 1600 polyvinyl alcohol (PVA, “Kuraray Poval CP-1000” manufactured by Kuraray), polyvinylene butyral (PVB, “ESREC BM-1” manufactured by Sekisui Chemical Co., Ltd.), polystyrene (PS, “manufactured by Nippon Polystyrene Corporation” G757 ”) was charged in a predetermined amount, and the inside of the production vessel was sufficiently purged with nitrogen.
- PVA Polyvinyl alcohol
- PVB polyvinylene butyral
- PS polystyrene
- the production container 1 was submerged in a metal salt molten bath 5 (manufactured by Shin-Nippon Chemical Co., Ltd.) equipped with a micro heater 2 (manufactured by Sukegawa Electric Industry Co., Ltd.) and treated at the temperature and pressure shown in Table 4 for a predetermined time. Thereafter, the production container 1 was rapidly cooled with a cooling bath, and then the polymer alloy obtained after ice cooling was taken out and dried.
- a metal salt molten bath 5 manufactured by Shin-Nippon Chemical Co., Ltd.
- a micro heater 2 manufactured by Sukegawa Electric Industry Co., Ltd.
- the dried polymer alloy was molded by hot pressing for 2 minutes at the sheeting temperature shown in Table 4 to obtain a sheet-like body having a thickness of about 0.8 mm.
- the obtained sheet was irradiated with an electron beam having an acceleration voltage of 500 kV in a nitrogen atmosphere using an electron beam irradiation apparatus (manufactured by NHV Corporation) in the dose shown in Table 3. Thereafter, the sheet-like body was molded by hot pressing at a molding temperature shown in Table 3 for 10 minutes to obtain a film having a thickness of about 55 ⁇ m.
- Kuraray "Kuraray Poval CP-1000” polyvinylene butyral (PVB, Sekisui Chemical “S Lec BM-1”), acrylonitrile butadiene rubber (NBR, JSR "N222L”), nylon 6 (PA6, A predetermined amount of “UBE Nylon 1022B” manufactured by Ube Industries, Ltd.) was introduced from a feeder, and the raw material was plasticized at a kneader rotation speed of about 1000 rpm, and then a predetermined amount of solvent was injected from the resin kneading unit.
- the resin kneading part was set to the temperature and resin pressure shown in Table 5 and immediately after being extruded from the mold part, and then formed into a sheet with a cooling roll, the resulting polymer alloy was dried to form a sheet having a thickness of about 0.8 mm I got a thing.
- the mixing time shown in Table 5 is a value obtained by calculation of the time required from the introduction of the raw material resin to the extrusion from the mold part.
- the obtained sheet was irradiated with an electron beam having an acceleration voltage of 500 kV in a nitrogen atmosphere using an electron beam irradiation apparatus (manufactured by NHV Corporation) in the dose shown in Table 4. Thereafter, the sheet was molded by hot pressing for the molding temperature and time shown in Table 5 to obtain a sheet having a thickness of about 300 ⁇ m.
- the manufacturing method of the polymer alloy which can perform a defoaming, a shaping
- the polymer alloy manufactured by the manufacturing method of this polymer alloy can be provided.
- FIG. 2 is an electron micrograph of a phase structure before hot pressing at 220 ° C. for 10 minutes in Example 1.
- FIG. 2 is an electron micrograph of a phase structure after hot pressing at 220 ° C. for 10 minutes in Example 1.
- FIG. 2 is an electron micrograph of a phase structure before hot pressing at 220 ° C. for 10 minutes in Comparative Example 1.
- FIG. 2 is an electron micrograph of a phase structure after hot pressing at 220 ° C. for 10 minutes in Comparative Example 1.
- FIG. 2 is an electron micrograph of a phase structure after hot pressing at 220 ° C. for 10 minutes in Comparative Example 1.
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Abstract
Description
以下に本発明を詳述する。
通常、いったん形成されたポリマーアロイの微細相分離構造は、加熱して樹脂の流動性が上昇すると破壊されてしまう。しかしながら、電離性放射線を照射すると、ポリマーアロイを構成する各樹脂にラジカルが発生し、樹脂間に架橋反応が生じることにより、微細相分離構造が安定するものと考えられる。
このような劣化耐性の高い樹脂としては、例えば、ポリエチレン、エチレン酢酸ビニル共重合体、アクリロニトリルスチレン共重合体、アクリロニトリルブタジエンスチレン共重合体、アクリル樹脂、ポリスチレン、エチレンビニルアルコール共重合体、メチルペンテン樹脂、ポリフェニレンエーテル、ポリアミド、ポリフェニレンエーテル、ポリエーテルエーテルケトン、ポリアリルエーテルケトン、ポリアミドイミド、ポリイミド、ポリエーテルイミド、ノルボルネン系樹脂、ポリビニルアルコール、ウレタン樹脂、ポリビニルピロリドン、ポリビニルブチラール、液晶ポリマー等が挙げられる。
ただし、電離性放射線に対する劣化耐性は、照射条件によっても大きく変化する。例えば、窒素雰囲気下や適切な温度条件下では劣化は起こりにくい。従って、一般に電離性放射線に対する劣化耐性が低いと考えられている樹脂であっても、条件を整えることにより用いることができることがある。
上記有機溶媒としては、炭化水素系有機溶剤、エーテル系有機溶剤、エステル系有機溶剤、ケトン系有機溶剤、アルコール系有機溶剤、ジメチルスルホキシド、N,N-ジメチルホルムアミド等が挙げられる。
上記エーテル系有機溶剤としては、例えば、ジエチルエーテル、ジブチルエーテル、テトラヒドロフラン、ジオキサン等が挙げられる。
上記エステル系有機溶剤としては、例えば、酢酸エチル、酢酸ブチル等が挙げられる。
上記ケトン系有機溶剤としては、例えば、アセトン、メチルエチルケトン、メチルイソブチルケトン等が挙げられる。
上記アルコール系有機溶剤としては、例えば、メタノール、エタノール、イソプロピルアルコール等が挙げられる。
上記クロロフルオロカーボンとしては、例えば、クロロジフルオロメタン、ジクロロトリフルオロエタン等が挙げられる。
上記低分子量アルカンとしては、例えば、n-ブタン、プロパン、エタン等が挙げられる。
なかでも、非相溶な2種類以上の樹脂の1つとして後述する熱可塑性ノルボルネン系樹脂を含む場合には、溶媒として水を用いることが好ましい。常温常圧環境下では実用的にはシクロヘキサンにしか溶解しない熱可塑性ノルボルネン系樹脂であっても、高温高圧流体又は超臨界流体となり極性が減少した水に対しては充分に溶解させることができる。常温常圧環境下においては熱可塑性ノルボルネン系樹脂は水に溶解しないため取り出しやすく取扱いやすい。また、溶媒としてアルコールを用いることも好ましい。アルコールも比較的低温で高温高圧状態又は超臨界状態となるので、樹脂が熱分解を起こすことがなく好適に使用される。
上記相溶化剤としては、ポリマーアロイを形成させたい各樹脂にそれぞれ相溶することができるセグメントが存在するオリゴマー又はポリマーが挙げられる。上記相溶化剤がポリマーであるときは、ランダムポリマー、ブロックポリマー、グラフトポリマーのいずれでもよい。
上記高温高圧流体又は超臨界流体の温度の好ましい下限は100℃、好ましい上限は700℃である。上記高温高圧流体又は超臨界流体の温度が100℃未満であると、得られるポリマーアロイの超微小相分離構造の形成が不充分となることがあり、700℃を超えると、樹脂が分解したり、昇温するために必要とするエネルギーが非常に大きくかつエネルギーロスが大きくなるため、コストが高くなり経済的でないことがある。上記高温高圧流体又は超臨界流体の温度のより好ましい上限は400℃である。
上記工程3においては、高温高圧流体又は超臨界流体を解圧して断熱膨張による吸熱により冷却してもよいし、解圧せずに急速にガラス転移温度以下にまで冷却してもよい。
工程4において行う電子線処理の反応効率を高めるためには、非発泡のポリマーアロイを用いる方が好ましいことから、解圧せずに急速にガラス転移温度以下にまで冷却する方が好ましい。
上記解圧せずに急速にガラス転移温度以下にまで冷却する方法を採る場合には、製造温度からガラス転移温度までの降温速度を25℃/min以上とすることが好ましい。25℃/min未満であると、超時間高温に晒されることから、樹脂が劣化することがある。上記降温速度は、より好ましくは50℃/min以上である。
なお、ガラス転移温度が複数存在する場合には、最も低いガラス転移温度を示す樹脂のガラス転移温度まですみやかに急冷してもよいし、各樹脂のガラス転移温度まで段階的に急冷を繰り返してもよい。この場合、冷却速度を変えることにより、任意の相構造の形成が可能である。例えば、上限臨界共溶温度がマトリクス成分のガラス転移温度よりも高く、かつ、ドメイン成分のガラス転移温度がマトリクス成分のガラス転移温度よりも高い場合、マトリクス成分のガラス転移温度より高い温度に一定時間保持しドメイン成分を析出させた後に急冷すれば、完全相溶構造ではなく微小相分離構造を有するポリマーアロイを得ることができる。
また、樹脂のガラス転移温度が室温以下である場合には、少なくとも室温まで急冷すれば、相構造をある程度維持することができる。
なお、図1の製造装置では加熱手段として金属塩溶融浴を用いたが、その他にも、例えば、電気ヒーター、バーナー、燃焼ガス、蒸気、熱媒、サンドバス等の加熱手段を用いることができる。
上記製造容器1の材質としては、例えば、炭素鋼、Ni、Cr、V 、Mo等の特殊鋼、オーステナイト系ステンレス鋼、ハステロイ、チタン又はこれらにガラス、セラミック、カーバイト等をライニング処理したもの、他の金属をクラッドしたもの等が挙げられる。
また、製造容器1の形状としては特に限定されず、例えば、槽型、管型、又は、特殊な形状のものでも使用できる。なかでも、耐熱、耐圧の問題を考えると槽型又は管型が好ましい。バッチ式の場合は、オートクレーブや管型反応管が好ましい。
この状態で所定の時間保持して、上記の2種以上の樹脂を相溶化させた後、製造容器1を冷却浴に素早く投入し、急速に冷却する。充分に冷却した後、製造容器1内に生成したポリマーアロイを取り出す方法が挙げられる。
得られたポリマーアロイは流体とともに背圧調整弁13を備えた回収タンク14に貯留される。
上記電離性放射線の照射としては、具体的には例えば、NHVコーポレーション社製の電子線照射装置を用いて照射する方法等が挙げられる。
また、上記粘弾性測定の方法としては、一般的な測定方法であれば特に限定されず、例えばせん断測定モード、延伸測定モード、圧縮測定モード等が挙げられる。特に1mm程度の樹脂シートを用いたせん断測定モードは境界条件による誤差が生じにくいため好ましい。
本発明のポリマーアロイの製造方法を用いてなるポリマーアロイもまた、本発明の1つである。
ln(I(s))=ln(I(0))-s2・Rg2/3
式中、Rgはドメインサイズを表し、I(0)は散乱角0の散乱強度を表す。
上記透明性に優れる樹脂としては特に限定されず、例えば、熱可塑性ノルボルネン系樹脂、ポリメタクリル酸メチル、ポリスチレン、ポリカーボネート、ポリエステル等が挙げられる。また、それぞれの樹脂の屈折率が近い場合には、透明性を実現しやすく好ましい。また、光学用途の中には低屈折率を必要とする用途もあるが、そのような用途には屈折率の低い、熱可塑性ノルボルネン系樹脂、ポリメタクリル酸メチル、ポリスチレン等の樹脂が好適である。
上記熱可塑性ノルボルネン系樹脂としては特に限定されず、例えば、ノルボルネン系モノマーの開環重合体(共重合体を含む)の水素添加物、ノルボルネン系モノマーとエチレン及び/又はα-オレフィン等のオレフィン系モノマーとの共重合体等を挙げることができる。これらはいずれも実質的に不飽和結合を有さないものである。
このような極性基としては特に限定されず、例えば、ハロゲン基(塩素基、臭素基、フッ素基)、水酸基、カルボン酸基、エステル基、アミノ基、無水酸基、シアノ基、シリル基、エポキシ基、アクリル基、メタクリル基、シラノール基等が挙げられる。なかでも、脱保護により反応性を与えることのできるエステル基や無水酸基が好適である。
上記酸化防止剤としては、例えば、2,6-ジ-t-ブチル-4-メチルフェノール、2,2’-ジオキシ-3,3’-ジ-t-ブチル-5,5’-ジメチルジフェニルメタン、テトラキス[メチレン-3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート]メタン等が挙げられる。
上記紫外線吸収剤としては、例えば、2,4-ジヒドロキシベンゾフェノン、2-ヒドロキシ-4-メトキシベンゾフェノン等が挙げられる。
本発明のポリマーアロイを用いてなる成形品は、公知の成形手段、例えば、押出成形、射出成形、圧縮成形、ブロー成形、カレンダー成形等の成形手段を用いて作製することができる。
上記ハードコート層の形成手段としては、例えば、熱硬化法、紫外線硬化法、真空蒸着法、スパッタリング法、イオンプレーティング法等の公知の方法を挙げることができる。
本発明のポリマーアロイが熱可塑性ノルボルネン系樹脂を構成成分として含む場合は、その成形性、耐熱性に優れるという点を最大限に活かして、特に位相差フィルム、偏光板保護フィルム等の光学フィルムに適する。
本発明の光学フィルムは、引き裂き強度が0.1N以上であることが好ましい。0.1N未満であると、光学フィルムとしての使用範囲が限定されることがあり、特に10μm以下の薄膜の場合にはその傾向が顕著となる。
本発明の光学フィルムは、全光線透過率が60%以上であることが好ましい。60%未満であると、光学フィルムとしての使用範囲が限定されることがある。より好ましくは70%以上、更に好ましくは80%以上である。
本発明の光学フィルムは、ヘイズが20%以下であることが好ましい。20%未満であると、光学フィルムとしての使用範囲が限定されることがある。より好ましくは10%以下、更に好ましくは5%以下である。
本発明の光学フィルムは、例えば、押出成形法、プレス成形法等により製造することができる。本発明の光学フィルムの厚さは、通常10~300μmである。
図1に示した回分式の製造容器1(管型容器、SUS316製、Tube Bomb Reacter 、内容積100cc)に、表1に示した配合組成に従って所定の溶媒、熱可塑性ノルボルネン系樹脂(ZEON社製「ゼオノア1600」)、ポリビニルアルコール(PVA、クラレ社製「クラレポバールCP-1000」)を所定量投入し、充分に製造容器内を窒素置換した。
次いで、製造容器1をマイクロヒーター2(助川電気工業社製)を備えた金属塩溶融浴5(新日豊化学社製)中に沈め、表1に示した温度、圧力で所定時間処理した。その後、製造容器1を冷却浴により急速に冷却し、次いで氷冷した後得られたポリマーアロイを取り出して乾燥した。
電子線の線量を表1に示した用にした以外は、実施例1と同様にしてフィルムを得た。
実施例1と同様の方法により得られた乾燥後のポリマーアロイを、電子線処理を施すことなく、220℃、10分間の熱プレスにより成型して、約55μm厚のフィルムを得た。
実施例1~4及び比較例1、2で得られたフィルムについて、ガラス転移温度(融点)、tanδの値、相構造のサイズ変化、全光線透過率、透湿性を以下の方法で測定した。
結果を表1に示した。
TA Instruments社製DSC2920 Modulated DSCを用い、下記の温度プログラム条件において、昇温時のガラス転移温度(融点)を求めた。
.室温から-50℃まで10℃/minで降温し、-50℃にて5分間維持、次いで、-50℃から280℃まで10℃/minで昇温
得られたフィルムを長さ約45mm、幅5mmにカットし、Reometrics社製RSA-2を用い、チャック間距離36mmで試料をセットして延伸測定モード(ひずみ量0.1%、周波数10Hz)にて昇温速度5℃/分の室温から220℃までの温度分散測定を行った。得られたtanδ値のうちDSC測定によって既知の最も高い流動温度から20℃高温でのtanδ値を読み取った。
透過型電子顕微鏡を用いて相分離構造を観察した。220℃、10分間の熱プレス前後での相構造のサイズに変化が見られないものを○、サイズが5倍以上大きくなっているものを×と評価した。
例として、実施例1での220℃、10分間の熱プレス前の相構造の電顕写真を図3に、熱プレス後の相構造の電顕写真を図4に示した。また、比較例1での220℃、10分間の熱プレス前の相構造の電顕写真を図5に、熱プレス後の相構造の電顕写真を図6に示した。
ヘイズメーター(東京電色社製、HCIIIDPK)を用い、JIS K 7150に準拠して測定した。
なお、フィルムの成型自体ができなかった場合には「-」と評価した。
JIS Z 208 1976に準拠して測定した。
なお、フィルムの成型自体ができなかった場合には「-」と評価した。
図1に示した回分式の製造容器1(管型容器、SUS316製、Tube Bomb Reacter 、内容積100cc)に、表2に示した配合組成に従って所定の溶媒、熱可塑性ノルボルネン系樹脂(ZEON社製「ゼオノア1600」)、ポリビニルアルコール(PVA、クラレ社製「クラレポバールCP-1000」)を所定量投入し、充分に製造容器内を窒素置換した。
次いで、製造容器1をマイクロヒーター2(助川電気工業社製)を備えた金属塩溶融浴5(新日豊化学社製)中に沈め、表2に示した温度、圧力で所定時間処理した。その後、製造容器1を開放解圧し、得られたポリマーアロイを取り出して乾燥した。
電子線の線量を表2に示した用にした以外は、実施例5と同様にしてフィルムを得た。
実施例5と同様の方法により得られた乾燥後のポリマーアロイを、電子線処理を施すことなく、220℃、10分間の熱プレスにより成型して、約55μm厚のフィルムを得た。
実施例5と同様の方法により得られた乾燥後のポリマーアロイを、電子線処理を施すことなく、プラストミル(東洋精機製社製、LABO PLASTOMILL MODEL 100C100)を用いて、230℃で混練することにより脱泡処理した。脱泡処理後のポリマーアロイを220℃、10分間の熱プレスにより成型して、約55μm厚のフィルムを得た。
実施例5~8及び比較例3~5で得られたフィルムについて、ガラス転移温度(融点)、の、相構造のサイズ変化、全光線透過率、透湿性を上記の方法で測定した。
結果を表2に示した。
図1に示した回分式の製造容器1(管型容器、SUS316製、Tube Bomb Reacter 、内容積100cc)に、表3に示した配合組成に従って所定の溶媒、熱可塑性ノルボルネン系樹脂(ZEON社製「ゼオノア1600」)、ポリビニルアルコール(PVA、クラレ社製「クラレポバールCP-1000」)を所定量投入し、充分に製造容器内を窒素置換した。
次いで、製造容器1をマイクロヒーター2(助川電気工業社製)を備えた金属塩溶融浴5(新日豊化学社製)中に沈め、表3に示した温度、圧力で所定時間処理した。その後、製造容器1を冷却浴により急速に冷却し、次いで氷冷した後得られたポリマーアロイを取り出して乾燥した。
実施例1と同様の方法により得られた乾燥後のポリマーアロイを、電子線処理を施すことなく、220℃、10分間の熱プレスにより成型して、約55μm厚のフィルムを得た。
株式会社テクノベル社製二軸混練機「KZW15TW-60MG-NH(-5000)」を用い表3に示した配合比率にしたがって熱可塑性ノルボルネン系樹脂(ZEON社製「ゼオノア1600」)、ポリビニルアルコール(PVA、クラレ社製「クラレポバールCP-1000」)をフィーダーより所定量投入し、混練機回転数約1000rpmで原料を可塑化させた後、樹脂混練部より溶媒を所定量注入した。この樹脂混練部を表3に示した温度、樹脂圧に設定し金型部より押出した直後に冷却ロールにてシート化した後、得られたポリマーアロイを乾燥し約0.8mm厚のシート状物を得た。なお、表3に示した混合時間は原料樹脂投入後から金型部からの押出しまでに要する時間を計算上求めた値としている。
実施例10~12と同様の方法により得られた乾燥後のポリマーアロイを、電子線処理を施すことなく、プラストミル(東洋精機製社製、LABO PLASTOMILL MODEL 100C100)を用いて、230℃で混練することにより脱泡処理した。脱泡処理後のポリマーアロイを220℃、10分間の熱プレスにより成型して、約55μm厚のフィルムを得た。
実施例9~12及び比較例6~9で得られたフィルムについて、ガラス転移温度(融点)、tanδの値、相構造のサイズ変化、全光線透過率、透湿性を上記の方法で測定した。
結果を表3に示した。
図1に示した回分式の製造容器1(管型容器、SUS316製、Tube Bomb Reacter 、内容積100cc)に、表4に示した配合組成に従って所定の溶媒、熱可塑性ノルボルネン系樹脂(ZEON社製「ゼオノア1600」)、ポリビニルアルコール(PVA、クラレ社製「クラレポバールCP-1000」)、ポリビニレンブチラール(PVB、積水化学社製「エスレックBM-1」)、ポリスチレン(PS、日本ポリスチレン社製「G757」)を所定量投入し、充分に製造容器内を窒素置換した。
次いで、製造容器1をマイクロヒーター2(助川電気工業社製)を備えた金属塩溶融浴5(新日豊化学社製)中に沈め、表4に示した温度、圧力で所定時間処理した。その後、製造容器1を冷却浴により急速に冷却し、次いで氷冷した後得られたポリマーアロイを取り出して乾燥した。
実施例13~16と同様の方法により得られた乾燥後のポリマーアロイを、電子線処理を施すことなく、表4に示す成形温度にて10分間熱プレスすることで成型し、約55μm厚のフィルムを得た。
実施例13~16及び比較例10~13で得られたフィルムについて、ガラス転移温度(融点)、tanδの値、相構造のサイズ変化、全光線透過率を上記の方法で測定した。
結果を表4に示した。
株式会社テクノベル社製二軸混練機「KZW15TW-60MG-NH(-5000)」を用い表5に示した配合比率にしたがって低密度ポリエチレン(LLDPE、ダウ社製「AFFINITY PL1850」)、ポリビニルアルコール(PVA、クラレ社製「クラレポバールCP-1000」)、ポリビニレンブチラール(PVB、積水化学社製「エスレックBM-1」)、アクリロニトリルブタジエンゴム(NBR、JSR社製「N222L」)、ナイロン6(PA6、宇部興産社製「UBEナイロン1022B」)をフィーダーより所定量投入し、混練機回転数約1000rpmで原料を可塑化させた後、樹脂混練部より溶媒を所定量注入した。この樹脂混練部を表5に示した温度、樹脂圧に設定し金型部より押出した直後に冷却ロールにてシート化した後、得られたポリマーアロイを乾燥し約0.8mm厚のシート状物を得た。なお、表5に示した混合時間は原料樹脂投入後から金型部からの押出しまでに要する時間を計算上求めた値としている。
実施例17~21と同様の方法により得られた乾燥後のポリマーアロイを、電子線処理を施すことなく、表5に示す成形温度、時間熱プレスすることで成型し、約300μm厚のシートを得た。
実施例17~21及び比較例14~18で得られたフィルムについて、ガラス転移温度(融点)、tanδの値、相構造のサイズ変化を上記の方法で測定した。
結果を表5に示した。
2 ヒーター
3 金属塩
4 熱電対
5 金属塩溶融浴
6 押出機
7 シリンジフィーダー
8 シースヒーター
9 定量ポンプ
10 金属塩溶融浴
11 電気炉
12 冷却機
13 背圧調整弁
14 回収タンク
Claims (3)
- 少なくとも、
常温常圧では互いに非相溶である2種類以上の樹脂と常温常圧で液状又は気体状である溶媒とを混合する工程1と、
前記溶媒を加熱及び加圧して高温高圧流体又は超臨界流体とし、この状態で混合する工程2と、
前記工程2で得られた混合物を常温常圧に戻す工程3と、
前記工程3で得られた混合物に電離性放射線を照射する工程4とを有する
ことを特徴とするポリマーアロイの製造方法。 - 工程4において、得られるポリマーアロイについて示差走査熱量測定(DSC)測定によって観測される最も高い流動温度から20℃高温で測定した粘弾性測定のtanδ値がひずみ量0.1%、周波数10Hzの条件下で1以上であり、かつ、最も高い流動温度以上に加熱し冷却した後も相構造のサイズに変化がない範囲の照射量で電離性放射線を照射することを特徴とする請求項1記載のポリマーアロイの製造方法。
- 請求項1又は2記載のポリマーアロイの製造方法を用いてなることを特徴とするポリマーアロイ。
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JP5368799B2 (ja) | 2013-12-18 |
JPWO2009144840A1 (ja) | 2011-09-29 |
EP2284212A1 (en) | 2011-02-16 |
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