WO2009142231A1 - ポリマー微粒子の製造方法 - Google Patents
ポリマー微粒子の製造方法 Download PDFInfo
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- WO2009142231A1 WO2009142231A1 PCT/JP2009/059254 JP2009059254W WO2009142231A1 WO 2009142231 A1 WO2009142231 A1 WO 2009142231A1 JP 2009059254 W JP2009059254 W JP 2009059254W WO 2009142231 A1 WO2009142231 A1 WO 2009142231A1
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- polymer
- solvent
- fine particles
- particle size
- producing
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Definitions
- the present invention relates to a method for producing polymer fine particles, and more particularly relates to a method for simply producing polymer fine particles having a small particle size distribution and polymer fine particles obtained therefrom.
- the polymer fine particles are fine particles made of a polymer, and generally have a wide variety of diameters ranging from several tens of nm to several hundreds of ⁇ m. Unlike polymer molded products such as films, fibers, injection molded products, and extrusion molded products, polymer fine particles are used for modification and improvement of various materials by utilizing a large specific surface area and the structure of fine particles. Yes. Major applications include cosmetic modifiers, toner additives, rheology modifiers such as paints, medical diagnostic inspection agents, additives to molded articles such as automotive materials and building materials. In particular, in recent years, it has come to be used as a raw material for rapid prototyping and rapid manufacturing, which is a technique for making a custom-made molded product in combination with a laser processing technique by utilizing the fine particle structure of polymer fine particles.
- polymer fine particles having high heat resistance and solvent resistance and a more uniform particle size distribution have been demanded as polymer fine particles.
- Conventional methods for producing fine polymer particles can be broadly classified into build-up processes such as emulsion polymerization, and top-down processes such as mechanical pulverization, melt-kneading, dissolution and precipitation, and emulsion-precipitation. it can.
- radical polymerization of vinyl polymers such as emulsion polymerization.
- Such radical polymerization has been widely used as a method for producing colloidal particles for a long time, and it is possible to produce particles of several tens to several ⁇ m.
- Fine particles produced by the radical polymerization method have been studied for a long time in applications such as modifiers for ABS resins, spacer materials for liquid crystal displays, and emulsion paints, and are a common method for obtaining polymer fine particles. .
- Non-patent Documents 1 and 4 examples of such a special particle size control technique include a dispersion polymerization method using solubility, a macromonomer method characterized by an initiator, and the like.
- these methods also have problems that are limited to vinyl polymers as described above, and have been difficult to apply to a wide range of polymers.
- a method that is simply used as a typical top-down process is a mechanical grinding method.
- polymer pellets are frozen with liquid nitrogen and mechanically pulverized.
- this technique may require freezing of the polymer, which is energy cost and the resulting pulverized product generally has an irregular shape, and at the current technical level, The average particle size is up to 1 ⁇ m at the lower limit, and it is very difficult to pulverize below that.
- Patent Document 5 melt-kneading method
- Patent Document 6 dissolution precipitation method
- emulsion method an emulsion method
- the melt-kneading method described in Patent Document 5 uses an extruder to melt and knead a polymer component incompatible with a polymer at a high temperature to form a sea-island structure, dissolve the sea component, This is a production method for extracting particles.
- the melt-kneading method has problems such as requiring a high temperature, a large particle size distribution of the resulting fine particles, and difficulty in miniaturizing the average particle size due to kneading under high viscosity conditions. .
- the dissolution precipitation method described in Patent Document 6 is a method in which a polymer is heated to high temperature in the presence of a solvent to form a polymer solution and cooled to obtain fine particles. This method has a problem that the productivity is inferior in many cases because the production amount is limited to the solubility of the polymer in the solvent or less.
- an emulsion is formed with the solution or melt and water, and then the shape is maintained.
- Emulsion methods for obtaining polymer particles are known.
- a method of making an emulsion in water by dissolving a polyurethane resin in Patent Document 7 or the like is known, and a method of making an emulsion in water by dissolving polymethyl methacrylate in methylene chloride is known in Patent Document 8 or the like. .
- thermosetting polymer precursor an emulsion solidification method in which the polymer precursor is emulsified in a dispersion medium and then cured (Patent Documents 9 and 10). .
- the emulsion method has the characteristic that the emulsion diameter is directly changed to the particle diameter, and the particle diameter of the emulsion is determined by the stirring power, the viscosity, and the interfacial tension, and generally the particle diameter distribution becomes large.
- Non-Patent Document 2 Non-Patent Document 2.
- PES particles aromatic polyethersulfone particles
- a mechanical pulverization method, a chemical particle formation method, and the like are known.
- Patent Document 2 As a chemical particle formation method, a solution in which PES is dissolved in N-methyl-2-pyrrolidone (NMP) and ethanol is added to pure water in which octylphenoxypolyethoxyethanol is dissolved, and the particle diameter is 1 ⁇ m or less.
- NMP N-methyl-2-pyrrolidone
- Patent Document 3 A method for obtaining an aqueous dispersion of is disclosed.
- the particle size distribution is not clearly described, and there is a problem that the process is complicated because there are many types of solvents to be used.
- Patent Document 3 the specific method is not specified, and determination of feasibility is difficult.
- the in-liquid drying method has a problem in that productivity is deteriorated because the process is complicated and solvent removal is expensive.
- JP 2007-254727 A Japanese Patent Publication No. 4-71081 JP 7-133328 A JP 2004-149469 A JP 2005-162840 A Japanese Patent Laid-Open No. 2005-054153 JP-A-63-75038 Japanese Patent Laid-Open No. 3-168217 Japanese Patent Laid-Open No. 1-158042 JP-A-6-287271 JP 2007-231234 A JP 2000-80329 A JP-A-4-325590
- An object of the present invention is to provide a method for producing polymer fine particles that is simple and has a uniform particle size distribution as compared with conventional methods, and further provides a highly heat-resistant polymer that has been difficult to produce. It is an object of the present invention to provide a production method capable of easily obtaining fine particles of various polymers, and polymer fine particles obtained therefrom.
- the present invention As the first invention, “(1) When a polymer A, a polymer B, and an organic solvent are dissolved and mixed, in a system that separates into two phases, a solution phase mainly composed of the polymer A and a solution phase mainly composed of the polymer B, After forming an emulsion, the polymer A is precipitated by bringing the polymer A into contact with a poor solvent of the polymer A. (2) Dissolve at least one polymer A, polymer B, and an organic solvent selected from vinyl polymers, polycarbonate, polyamide, polyphenylene ether, polyetherimide, amorphous polyarylate, polyamideimide, and epoxy resin.
- Aromatic polyethersulfone having a structure represented by the general formula (a-1) and / or the general formula (a-2) in the presence of a surfactant having a number average molecular weight of 1000 or more A method for producing aromatic polyethersulfone particles, wherein the aromatic polyethersulfone particles are precipitated,
- each R may be the same or different and represents any one selected from an alkyl group having 1 to 6 carbon atoms and an aryl group having 6 to 8 carbon atoms, and m is 0 to 3)
- Y represents an integer selected from a direct bond, oxygen, sulfur, SO 2 , CO, C (CH 3 ) 2, CH (CH 3 ), and CH 2 ) ”
- the particle size distribution index is 2 or less, and polyether sulfone, polycarbonate, amorphous non-fully aromatic polyamide, polyphenylene ether, polyether imide, amorphous polyarylate, polyamide imide, polyether ketone, epoxy resin
- the polymer fine particle production method of the present invention can be applied to various polymers including a high heat resistance polymer that could not be obtained by the conventional method, and the conventional method requires a special apparatus.
- fine particles having a small particle size distribution can be obtained by a simple technique.
- the production method of the present invention makes it possible to obtain fine particles having a small particle size distribution in a region size that cannot be obtained by the conventional method.
- FIG. 1 is a three-component phase diagram of amorphous polyamide, polyvinyl alcohol, and N-methyl-2-pyrrolidone.
- FIG. 2 is a scanning electron micrograph of the polyethersulfone fine particles produced in Example 1.
- FIG. 3 is a scanning electron micrograph of the polycarbonate microparticles produced in Example 6.
- FIG. 4 is a scanning electron micrograph of the ABS fine particles produced in Example 7.
- FIG. 5 is a transmission electron micrograph of the cross section of the ABS fine particles produced in Example 7.
- 6 is a scanning electron micrograph of amorphous polyamide fine particles produced in Example 8.
- FIG. FIG. 7 is an optical micrograph of the system in which an emulsion was formed by vibrating the system formed of polymer A, polymer B and an organic solvent in the amorphous polyamide system of Example 8.
- a polymer A, a polymer B, and an organic solvent are dissolved and mixed, a solution phase containing the polymer A as a main component (hereinafter also referred to as a polymer A solution phase), and a solution phase containing the polymer B as a main component.
- a solution phase containing the polymer A as a main component hereinafter also referred to as a polymer A solution phase
- a solution phase containing the polymer B as a main component.
- a system in which polymer A, polymer B, and an organic solvent are dissolved and mixed and phase-separated into two phases of a solution phase mainly composed of polymer A and a solution phase mainly composed of polymer B means a polymer When A, polymer B, and an organic solvent are mixed, the system is divided into two phases, a solution phase mainly containing polymer A and a solution phase mainly containing polymer B.
- phase-separating system By using such a phase-separating system, it can be mixed and emulsified under the phase-separating conditions to form an emulsion.
- This emulsion has a polymer A solution phase in the dispersed phase, a polymer B solution phase in the continuous phase, and a polymer A solution in contact with the polymer A poor solvent by contacting the emulsion with the polymer A poor solvent. A precipitates, and polymer fine particles composed of the polymer A can be obtained.
- the combination thereof is not particularly limited as long as the polymer A, polymer B, an organic solvent for dissolving them, and a poor solvent for polymer A are used, and the polymer fine particles of the present invention are obtained.
- the polymer A refers to a high molecular polymer, preferably a synthetic polymer that does not exist in nature, and more preferably a water-insoluble polymer. Examples thereof include a thermoplastic resin and a thermosetting resin. Is mentioned.
- thermoplastic resin examples include vinyl polymer, polyester, polyamide, polyarylene ether, polyarylene sulfide, polyethersulfone, polysulfone, polyetherketone, polyetheretherketone, polyurethane, polycarbonate, polyamideimide, Examples thereof include polyimide, polyetherimide, polyacetal, silicone, and copolymers thereof.
- the vinyl polymer is obtained by homopolymerizing or copolymerizing vinyl monomers.
- vinyl polymers include vinyl monomers (from aromatic vinyl monomers such as styrene, vinyl cyanide monomers, other vinyl monomers, etc.) in the presence of rubbery polymers.
- a vinyl-based polymer containing a rubbery polymer such as a rubber-containing graft copolymer obtained by graft-copolymerizing a mixture thereof or a mixture thereof with a vinyl-based polymer. It may be a coalescence.
- vinyl polymers are polyethylene, polypropylene, polystyrene, poly (acrylonitrile-styrene-butadiene) resin (ABS), polytetrafluoroethylene (PTFE), polyacrylonitrile, polyacrylamide, polyacetic acid.
- ABS polystyrene
- PTFE polytetrafluoroethylene
- polyacrylonitrile polyacrylamide
- polyacetic acid examples include vinyl, polybutyl acrylate, polymethyl methacrylate, and cyclic polyolefin.
- the size of the region that has conventionally been difficult to obtain particles having a small particle size distribution that is, the average particle size is 10 ⁇ m or more, and in a preferred embodiment, 20 ⁇ m.
- the upper limit is usually 1000 ⁇ m or less.
- the graft copolymer (child particles) is dispersed in the matrix of the vinyl polymer.
- a finely divided polymer particle having a dispersed particle size distribution is particularly preferred.
- a specific example of such is a poly (acrylonitrile-styrene-butadiene) resin (ABS resin) in which a rubber-containing graft copolymer is dispersed in a matrix of poly (acrylonitrile-styrene) resin.
- Polyesters include polymers having polycarboxylic acids or ester-forming derivatives thereof and polyhydric alcohols or ester-forming derivatives thereof as structural units, polymers having hydroxycarboxylic acids or lactones as structural units, and copolymers of these. Coalescence is mentioned.
- polyester examples include polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polycyclohexanedimethylene terephthalate, polyhexylene terephthalate, polyethylene naphthalate, polypropylene naphthalate, polybutylene naphthalate, polyethylene isophthalate / terephthalate, polypropylene isophthalate / Terephthalate, polybutylene isophthalate / terephthalate, polyethylene terephthalate / naphthalate, polypropylene terephthalate / naphthalate, polybutylene terephthalate / naphthalate, polybutylene terephthalate / decane dicarboxylate, polyethylene terephthalate / cyclohexanedimethylene terephthalate, polyethylene Terephthalate / polyethylene glycol, polypropylene terephthalate / polyethylene glycol,
- amorphous polyarylate when used as the polyester used in the present invention, from the viewpoint of solubility in an organic solvent, it is easy to select an organic solvent, and fine particles having excellent heat resistance are obtained. be able to.
- amorphous polyarylate bisphenol A / terephthalic acid, bisphenol A / isophthalic acid, bisphenol A / terephthalic acid / isophthalic acid, etc. are preferably used.
- polyamides obtained by polycondensation of lactams having three or more members, polymerizable aminocarboxylic acids, dibasic acids and diamines or salts thereof, or mixtures thereof.
- polyamides examples include polycaproamide (nylon 6), polyhexamethylene adipamide (nylon 66), polypentamethylene adipamide (nylon 56), polyhexamethylene sebacamide (nylon 610), Polyundecamide (nylon 11), polydodecamide (nylon 12), polyhexamethylene terephthalamide (nylon 6T), and amorphous polyamide include 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane Copolymer of isophthalic acid and 12-aminododecanoic acid (for example, 'Grillamide (registered trademark)' TR55, manufactured by Mzavelke), 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane and dodeca Diacid copolymer (for example, 'Grillamide (registered trader) ) 'TR90, manufactured by Mzavelke), 3,3'-dimethyl-4,
- amorphous polyamide is particularly preferable, and among these, non-fully aromatic polyamide is preferable, specifically, aliphatic polyamide, semi-aromatic polyamide, fat Examples include cyclic polyamides.
- polymer fine particles having a small particle size distribution which was difficult to obtain by the conventional method, can be obtained, which is extremely effective.
- Polyarylene ether is a polymer in which aryl groups are connected by an ether bond, and examples thereof include those represented by general formula (1) and having a structure.
- the aromatic ring may or may not have a substituent R, and the number m of the substituents is 1 or more and 4 or less.
- Substituents include saturated hydrocarbon groups having 1 to 6 carbon atoms such as methyl, ethyl and propyl groups, unsaturated hydrocarbon groups such as vinyl and allyl groups, halogens such as fluorine, chlorine and bromine atoms.
- Preferred examples include a group, an amino group, a hydroxyl group, a thiol group, a carboxyl group, and a carboxy aliphatic hydrocarbon ester group.
- polyarylene ether examples include poly (2,6-dimethylphenylene ether).
- Polyarylene sulfide is a polymer in which aryl groups are connected by a sulfide bond, and includes those having a structure represented by the general formula (2).
- the aromatic ring may or may not have a substituent R, and the number m of the substituents is 1 or more and 4 or less.
- Substituents include saturated hydrocarbon groups such as methyl, ethyl and propyl groups, unsaturated hydrocarbon groups such as vinyl and allyl groups, halogen groups such as fluorine, chlorine and bromine, amino groups and hydroxyl groups. Thiol group, carboxyl group, carboxy aliphatic hydrocarbon ester group and the like.
- a metaphenylene unit or an orthophenylene unit may be used, or a copolymer thereof may be used.
- polyarylene sulfide examples include polyphenylene sulfide.
- Polyethersulfone has a structure represented by general formula (a-1) and / or general formula (a-2).
- R may be the same or different and represents any one selected from an alkyl group having 1 to 6 carbon atoms and an aryl group having 6 to 8 carbon atoms, and m is an integer of 0 to 3)
- Y represents any one selected from a direct bond, oxygen, sulfur, SO 2 , CO, C (CH 3 ) 2, CH (CH 3 ), and CH 2 )
- the molecular terminal of the polyether sulfone in this invention is PES whose hydroxyphenyl terminal group composition (mol%) is less than 50 mol%.
- hydroxyphenyl end group composition refers to protons adjacent to 7.7 ppm of chloro-substituted aromatic carbon by using 400 MHz 1 H-NMR in a deuterated DMSO solvent and accumulating 100 times. From the area ratio of (1H Cl ) and the proton (1H OH ) adjacent to the aromatic carbon substituted with 6.6 to 6.9 ppm of hydroxyl group, it is calculated by the following formula.
- the more preferable range of the hydroxyphenyl end group composition (mol%) is less than 40 mol%, and more preferably less than 30 mol%.
- the molecular weight of polyethersulfone is the reduced viscosity measured in Osteald capillary viscometer in polyethersulfone DMF (N, N-dimethylformamide) at 25 ° C. and 1 g / dl (described in JIS K7367-1 (2002)). Is preferably in the range of 0.10 to 1.00.
- Such a polyether sulfone can be produced by a generally known method. Further, as the polyethersulfone produced by a known method, for example, “ULTRASON E” series manufactured by BSF Corporation, “Sumika Excel” series manufactured by Sumitomo Chemical Co., Ltd., or the like can be used.
- Preferred examples of polysulfone include those having a structure represented by the general formula (3).
- R represents an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 8 carbon atoms
- m represents an integer of 0 to 4
- Polycarbonate is a polymer having a carbonate group, and preferred examples include those having a structure represented by the general formula (6).
- R represents an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 8 carbon atoms
- m represents an integer of 0 to 4
- Polyamideimide is a polymer having an imide bond and an amide bond, and includes a polymer having a structure represented by the general formula (7).
- R 1 and R 2 represent an aromatic or aliphatic hydrocarbon, and may have a structural group having an ether bond, a thioether bond, a carboquinyl group, a halogen bond, or an amide bond inside.
- Polyimide is a polymer having an imide bond, and typically includes a polymer having a structure represented by the general formula (8).
- R 1 and R 2 represent an aromatic or aliphatic hydrocarbon, and may have a structural group having an ether bond, a thioether bond, a carboquinyl group, a halogen bond, or an amide bond inside.
- thermoplastic polyimide is preferable.
- a polycondensate of 1,2,4,5-benzenetetracarboxylic anhydride and 4,4′-bis (3-aminophenyloxy) biphenyl, 3,3 ′, 4,4′-polycondensate of biphenyltetracarboxylic anhydride and 1,3-bis (4-aminophenyloxy) benzene is preferable.
- a polycondensate of 1,2,4,5-benzenetetracarboxylic anhydride and 4,4′-bis (3-aminophenyloxy) biphenyl, 3,3 ′, 4,4′-polycondensate of biphenyltetracarboxylic anhydride and 1,3-bis (4-aminophenyloxy) benzene 1,2,4,5-benzenetetracarboxylic anhydride and 4,4′-bis (3-aminophenyloxy) biphenyl, 3,3 ′, 4,4′-polycon
- Polyetherimide is a polymer having an ether bond and an imide bond in the molecule. Specifically, 4,4 ′-[isopropylidenebis (p-phenyleneoxy)] diphthalic dianhydride And a polymer obtained by the condensation of and metaphenylenediamine.
- thermosetting resin may be used. Specifically, epoxy resin, benzoxazine resin, vinyl ester resin, unsaturated polyester resin, urethane resin, phenol resin, melamine resin, maleimide resin And cyanate ester resins and urea resins.
- epoxy resins are preferably used because of their high heat resistance and adhesiveness.
- the epoxy resin for example, a glycidyl ether type epoxy resin obtained from a compound having a hydroxyl group in the molecule and epichlorohydrin, a glycidylamine type epoxy resin obtained from a compound having an amino group in the molecule and epichlorohydrin, A glycidyl ester type epoxy resin obtained from a compound having a carboxyl group in the molecule and epichlorohydrin, an alicyclic epoxy resin obtained by oxidizing a compound having a double bond in the molecule, or 2 selected from these An epoxy resin or the like in which more than one type of group is mixed in the molecule is used.
- a curing agent can be used in combination with an epoxy resin.
- the curing agent used in combination with the epoxy resin include aromatic amines, aliphatic amines, polyamide amines, carboxylic acid anhydrides and Lewis acid complexes, acid-based curing catalysts, base-based curing catalysts, and the like.
- Preferred resins in the polymer A in the present invention include vinyl polymers such as polystyrene, poly (acrylonitrile-styrene-butadiene) (ABS) resin, polyacrylonitrile, polymethacrylamide, polyethersulfone, polycarbonate, polyamide, polyphenylene ether.
- Polyetherimide, amorphous polyarylate, polyamideimide, polyetherketone, polyetheretherketone, epoxy resin, etc. more preferably polyethersulfone, polycarbonate, amorphous non-fully aromatic polyamide, polyphenylene ether
- Examples include polyetherimide, amorphous polyarylate, polyamideimide, polyether ketone, and epoxy resin. More preferable examples include polyethersulfone, polycarbonate, amorphous non-fully aromatic polyamide resin, polyphenylene ether, polyetherimide, and epoxy resin.
- the polymer A described above can be used in one or more kinds.
- These preferable resins are excellent in thermal and / or mechanical properties, and the fine particles obtained by using them have a small particle size distribution, for example, fine particles having a particle size distribution index of 3 or less, and further 2 or less. It is preferable in that it can be applied to uses that could not be used with conventional fine particles.
- the molecular weight of the polymer A is preferably 1,000 to 100,000,000, more preferably 1,000 to 10,000,000, and still more preferably 5,000 to 1,000,000 in terms of weight average molecular weight. Particularly preferably in the range of 10,000 to 500,000, most preferably in the range of 10,000 to 100,000.
- the weight average molecular weight refers to a weight average molecular weight measured by gel permeation chromatography (GPC) using dimethylformamide as a solvent and converted to polystyrene.
- the polymer A is preferably insoluble in a poor solvent because the present invention is based on the point that the present invention precipitates fine particles when contacting with a poor solvent.
- a water-insoluble polymer is particularly preferable.
- the water-insoluble polymer is a polymer having a water solubility of 1% by mass or less, preferably 0.5% by mass or less, and more preferably 0.1% by mass or less.
- the polymer A is preferably an amorphous polymer because it is easily dissolved in an organic solvent. Therefore, among the examples of the polymer A, those corresponding to the amorphous polymer are preferably used.
- An amorphous polymer refers to a polymer in which the proportion of the crystalline portion is small or small in the crystalline phase and the amorphous phase inside the polymer, and these can be distinguished by differential scanning calorimetry (DSC method). That is, in the DSC measurement, the heat of fusion is not observed, or the value of the heat of fusion is 10 J / g or less, preferably 5 J / g or less, more preferably 2 J / g or less, and further 1 J / g or less. A polymer is preferred. At this time, the DSC measurement was carried out by heating the temperature range from 30 ° C. to a temperature exceeding 30 ° C.
- the amount of heat of fusion is defined as the amount of heat of fusion here.
- Examples of the polymer B include thermoplastic resins and thermosetting resins, but those that are soluble in an organic solvent that dissolves the polymer A used in the present invention and a poor solvent for the polymer A are preferable. And what dissolve
- polymer B examples include poly (vinyl alcohol) (which may be a fully saponified or partially saponified poly (vinyl alcohol)), a poly (vinyl alcohol-ethylene) copolymer ( Fully saponified or partially saponified poly (vinyl alcohol-ethylene) copolymer), polyvinylpyrrolidone, poly (ethylene glycol), sucrose fatty acid ester, poly (oxyethylene fatty acid ester), poly (Oxyethylene laurin fatty acid ester), poly (oxyethylene glycol monofatty acid ester), poly (oxyethylene alkylphenyl ether), poly (oxyalkyl ether), polyacrylic acid, sodium polyacrylate, polymethacrylic acid, polymethacrylic acid Sodium, polystyrene sulfonic acid, Sodium restyrenesulfonate, polyvinylpyrrolidinium chloride, poly (styrene-maleic acid) copolymer, aminopoly (acrylamide), poly (paravinylphenol), poly
- the molecular weight of the polymer B is preferably 1,000 to 100,000,000, more preferably 1,000 to 10,000,000, still more preferably 5,000 to 1,000,000 in terms of weight average molecular weight. 000, particularly preferably in the range of 10,000 to 500,000, and most preferably in the range of 10,000 to 100,000.
- the weight average molecular weight refers to a weight average molecular weight measured by gel permeation chromatography (GPC) using water as a solvent and converted into polyethylene glycol.
- dimethylformamide is used. If it cannot be measured, tetrahydrofuran is used. If it cannot be measured, hexafluoroisopropanol is used.
- the organic solvent for dissolving the polymer A and the polymer B is an organic solvent capable of dissolving the polymer A and the polymer B to be used, and is selected according to the type of each polymer.
- aliphatic hydrocarbon solvents such as pentane, hexane, heptane, octane, nonane, n-decane, n-dodecane, n-tridecane, tetradecane, cyclohexane, cyclopentane, benzene, toluene, xylene, 2- Aromatic hydrocarbon solvents such as methylnaphthalene, ester solvents such as ethyl acetate, methyl acetate, butyl acetate, butyl propionate, butyl butyrate, chloroform, bromoform, methylene chloride, carbon tetrachloride, 1,2-dichloroethane, 1 Halogenated hydrocarbon solvents such as 1,1,1-trichloroethane, chlorobenzene, 2,6-dichlorotoluene, hexafluoroisopropanol, ketone solvents
- aromatic hydrocarbon solvents aliphatic hydrocarbon solvents, halogenated hydrocarbon solvents, alcohol solvents, ether solvents, aprotic polar solvents, carboxylic acid solvents, and more preferred are: Alcohol-based solvents, aprotic polar solvents, and carboxylic acid solvents that are water-soluble solvents are preferred, and aprotic polar solvents and carboxylic acid solvents are particularly preferable.
- Most preferred is N-methyl-2- from the viewpoint that it can be dissolved and has a wide range of application to the polymer A and can be uniformly mixed with a solvent that can be preferably used as a poor solvent described later, such as water and alcohol solvents.
- Pyrrolidone dimethyl sulfoxide, N, N-dimethylformamide, N, N-dimethylacetamide, propylene carbonate, formic acid, It is an acid.
- organic solvents may be used in a plurality of types, or may be used in combination. However, particles having a relatively small particle size and a small particle size distribution can be obtained, and when used solvents are recycled. From the standpoint of reducing the process load in manufacturing, avoiding the troublesome separation step, it is preferable to use a single organic solvent, and it should be a single organic solvent that dissolves both polymer A and polymer B. Is preferred.
- the poor solvent for polymer A in the present invention refers to a solvent that does not dissolve polymer A.
- the solubility of the polymer A in the poor solvent is 1% by mass or less, more preferably 0.5% by mass or less, and further preferably 0.1% by mass or less.
- a poor solvent for polymer A is used, and the poor solvent is preferably a poor solvent for polymer A and a solvent that dissolves polymer B.
- the solvent for dissolving the polymer A and the polymer B and the poor solvent for the polymer A are solvents that are uniformly mixed.
- the poor solvent in the present invention varies depending on the type of polymer A to be used, desirably both types of polymers A and B, but specifically, pentane, hexane, heptane, octane, nonane, n -Aliphatic hydrocarbon solvents such as decane, n-dodecane, n-tridecane, tetradecane, cyclohexane, cyclopentane, etc., aromatic hydrocarbon solvents such as benzene, toluene, xylene, 2-methylnaphthalene, ethyl acetate, methyl acetate Ester solvents such as butyl acetate, butyl propionate and butyl butyrate, chloroform, bromoform, methylene chloride, carbon tetrachloride, 1,2-dichloroethane, 1,1,1-trichloroethane, chlorobenzene, 2,6-dich
- Examples include carboxylic acid solvents, ether solvents such as anisole, diethyl ether, tetrahydrofuran, diisopropyl ether, dioxane, diglyme, and dimethoxyethane, and a solvent selected from at least one of water.
- ether solvents such as anisole, diethyl ether, tetrahydrofuran, diisopropyl ether, dioxane, diglyme, and dimethoxyethane
- an aromatic hydrocarbon solvent an aliphatic hydrocarbon solvent, an alcohol solvent, an ether solvent, and water are preferable, and an alcohol solvent, water is most preferable. Particularly preferred is water.
- polymer A can be efficiently precipitated and polymer fine particles can be obtained by appropriately selecting and combining polymer A, polymer B, an organic solvent for dissolving them, and a poor solvent for polymer A.
- the liquid obtained by mixing and dissolving the polymers A and B and the organic solvent for dissolving them is phase-separated into two phases, a solution phase mainly composed of the polymer A and a solution phase mainly composed of the polymer B. is required.
- the solution-phase organic solvent containing polymer A as a main component and the organic solvent containing polymer B as a main component may be the same or different, but are preferably substantially the same solvent.
- Conditions for generating a two-phase separation state vary depending on the types of polymers A and B, the molecular weights of polymers A and B, the types of organic solvents, the concentrations of polymers A and B, the temperature and pressure at which the invention is to be carried out. .
- the difference between the solubility parameters of the polymer A and the polymer B (hereinafter also referred to as SP values) is separated.
- the difference in SP value is 1 (J / cm 3 ) 1/2 or more, more preferably 2 (J / cm 3 ) 1/2 or more, and further preferably 3 (J / cm 3 ) 1/2 or more. Particularly preferably, it is 5 (J / cm 3 ) 1/2 or more, and very preferably 8 (J / cm 3 ) 1/2 or more.
- the SP value is within this range, phase separation is easily performed.
- both polymer A and polymer B can be dissolved in an organic solvent, but the upper limit of the difference in SP value is preferably 20 (J / cm 3 ) 1/2 or less, more preferably 15 (J / Cm 3 ) 1/2 or less, more preferably 10 (J / cm 3 ) 1/2 or less.
- the SP value is calculated based on the Fedor's estimation method, and is calculated based on the cohesive energy density and the molar molecular volume (hereinafter also referred to as a calculation method).
- SP Value Basic / Application and Calculation Method
- the SP value is calculated by an experimental method by determining whether or not the solubility parameter is dissolved in a known solvent (hereinafter also referred to as an experimental method), and is used.
- Substitute Polymer Handbook Fourth Edition” by J. Brand, published in 1998 by Wiley.
- the SP value of the matrix resin is obtained by the above method and used.
- a three-component phase diagram can be prepared by a simple preliminary experiment by observing a state in which the ratio of the three components of the polymer A, the polymer B, and the organic solvent in which they are dissolved is changed. Can be distinguished.
- the phase diagram is prepared by mixing and dissolving the polymers A and B and the solvent at an arbitrary ratio and determining whether or not an interface is formed when allowed to stand at least 3 points, preferably 5 points or more.
- the measurement is performed at 10 points or more, and by separating the region that separates into two phases and the region that becomes one phase, the conditions for achieving the phase separation state can be determined.
- the polymers A and B are adjusted to any ratio of the polymers A and B and the solvent at the temperature and pressure at which the present invention is to be carried out. Then, the polymers A and B are completely dissolved, and after the dissolution, the mixture is sufficiently stirred and left for 3 days to confirm whether or not the phase separation is performed macroscopically.
- phase separation may not occur even if left for 3 days.
- an optical microscope, a phase contrast microscope, or the like is used to determine the phase separation based on whether or not the phase separation is microscopically.
- FIG. 1 shows a copolymer of 3,3′-dimethyl-4,4′-diaminodicyclohexylmethane, isophthalic acid and 12-aminododecanoic acid (“Grillamide®”), which is an amorphous polyamide as polymer A.
- Grillamide® is an amorphous polyamide as polymer A.
- TR55 an example of a three-component phase diagram with polyvinyl alcohol as polymer B and N-methyl-2-pyrrolidone as organic solvent, black circles indicate that phase separation was not performed, and white circles indicate phase separation. Indicates the point. From these black circle points and white circle points, it is possible to easily estimate a region that becomes one phase and a region that separates into two phases. From this three component diagram, the present invention is carried out with the component ratio of the region where the phases are separated into two phases.
- the phase separation is formed by separating a polymer A solution phase mainly containing polymer A and a polymer B solution phase mainly containing polymer B in an organic solvent.
- the polymer A solution phase is a phase in which the polymer A is mainly distributed
- the polymer B solution phase is a phase in which the polymer B is mainly distributed.
- the polymer A solution phase and the polymer B solution phase seem to have a volume ratio corresponding to the types and amounts of the polymers A and B used.
- the concentration of the polymers A and B with respect to the organic solvent is premised on being within a possible range that can be dissolved in the organic solvent. Is more than 1% by mass to 50% by mass, more preferably more than 1% by mass to 30% by mass, and still more preferably 2% by mass to 20% by mass.
- the interfacial tension between the two phases of the polymer A solution phase and the polymer B solution phase is an organic solvent
- the interfacial tension is small, and the resulting emulsion can be stably maintained due to its properties.
- the particle size distribution seems to be smaller.
- the organic solvents of the polymer A phase and the polymer B phase are the same, the effect is remarkable.
- the interfacial tension between the two phases in the present invention cannot be directly measured by the hanging drop method in which a different kind of solution is added to a commonly used solution because the interfacial tension is too small.
- the interfacial tension can be estimated by estimating from the surface tension.
- the surface tension of each phase with air is r 1 and r 2
- a preferable range of r 12 is more than 0 to 10 mN / m, more preferably more than 0 to 5 mN / m, still more preferably more than 0 to 3 mN / m, and particularly preferably More than 0 to 2 mN / m.
- the viscosity between the two phases in the present invention affects the average particle size and the particle size distribution, and the smaller the viscosity ratio, the smaller the particle size distribution.
- a preferable range is 0.1 or more and 10 or less, and a more preferable range is 0.1. 2 or more and 5 or less, more preferably 0.3 or more and 3 or less, particularly preferably 0.5 or more and 1.5 or less, and remarkably preferable range is 0.8 or more and 1.2 or less. is there.
- the temperature suitable for carrying out the present invention is in the range of ⁇ 50 ° C. to 200 ° C., preferably ⁇ 20 ° C. to 150 ° C., more preferably 0 ° C. to 120 ° C. from the viewpoint of industrial feasibility. More preferably, it is 10 ° C. to 100 ° C., particularly preferably 20 ° C. to 80 ° C., and most preferably in the range of 20 ° C. to 50 ° C.
- the pressure suitable for carrying out the present invention is in the range of 100 atm from the reduced pressure state, preferably in the range of 1 to 5 atm, and more preferably in the range of 1 to 2 atm.
- Atmospheric pressure particularly preferably atmospheric pressure.
- an emulsion is formed by mixing the phase separation system state.
- an emulsion is formed by applying a shearing force to the phase separation solution obtained above.
- the emulsion is formed so that the polymer A solution phase becomes particulate droplets.
- the volume of the polymer B solution phase is larger than the volume of the polymer A solution phase after phase separation is generally performed.
- the emulsion in such a form tends to be easily formed.
- the volume ratio of the polymer A solution phase is preferably 0.4 or less with respect to the total volume 1 of both phases, 0.4 to 0.1 It is preferable to be between.
- the fine particles obtained by this production method are fine particles having a small particle size distribution because a very uniform emulsion can be obtained at the stage of emulsion formation. This tendency is remarkable when a single solvent that dissolves both the polymers A and B is used. For this reason, in order to obtain a sufficient shearing force to form an emulsion, it is sufficient to use stirring by a conventionally known method, such as a liquid phase stirring method using a stirring blade, a stirring method using a continuous biaxial mixer, or a homogenizer. They can be mixed by a generally known method such as a mixing method or ultrasonic irradiation.
- the stirring speed is preferably 50 rpm to 1200 rpm, more preferably 100 rpm to 1000 rpm, still more preferably 200 rpm to 800 rpm, and particularly preferably 300 to 600 rpm.
- the stirring blade include a propeller type, a paddle type, a flat paddle type, a turbine type, a double cone type, a single cone type, a single ribbon type, a double ribbon type, a screw type, and a helical ribbon type.
- a propeller type a paddle type, a flat paddle type, a turbine type, a double cone type, a single cone type, a single ribbon type, a double ribbon type, a screw type, and a helical ribbon type.
- a paddle type a flat paddle type
- a turbine type a double cone type
- a single cone type a single cone type
- a single ribbon type a double ribbon type
- screw type and a helical ribbon type
- a stirrer In order to generate an emulsion, not only a stirrer but also a widely known device such as an emulsifier and a disperser may be used.
- a batch emulsifier such as a homogenizer (manufactured by IKA), polytron (manufactured by Kinematica), TK auto homomixer (manufactured by Tokushu Kika Kogyo Co., Ltd.), Ebara Milder (manufactured by Ebara Seisakusho) , TK fill mix, TK pipeline homomixer (manufactured by Koki Kogyo Co., Ltd.), colloid mill (manufactured by Shinko Pantech Co., Ltd.), slasher, trigonal wet pulverizer (manufactured by Mitsui Miike Chemical Co., Ltd.), ultrasonic homogenizer
- a mixer For example, a mixer.
- the emulsion thus obtained is subsequently subjected to a step of precipitating fine particles.
- a poor solvent for polymer A is brought into contact with the emulsion produced in the above-described step to precipitate fine particles with a diameter corresponding to the emulsion diameter.
- the contact method of the poor solvent and the emulsion may be a method of putting the emulsion in the poor solvent or a method of putting the poor solvent in the emulsion, but a method of putting the poor solvent in the emulsion is preferable.
- the method for introducing the poor solvent is not particularly limited as long as the polymer fine particles produced in the present invention are obtained, and any of a continuous dropping method, a divided addition method, and a batch addition method may be used.
- the continuous dropping method and the divided dropping method are preferable.
- the continuous dropping method is most preferred.
- the time for adding the poor solvent is from 10 minutes to 50 hours, more preferably from 30 minutes to 10 hours, and further preferably from 1 hour to 5 hours. If the time is shorter than this range, the particle size distribution may increase or a lump may be generated due to the aggregation, fusion and coalescence of the emulsion. Moreover, when it implements in the time longer than this, when industrial implementation is considered, it is unrealistic.
- the amount of the poor solvent to be added depends on the state of the emulsion, but is preferably 0.1 to 10 parts by weight, more preferably 0.1 to 5 parts by weight, even more preferably, with respect to 1 part by weight of the total emulsion. Is 0.2 to 3 parts by weight, particularly preferably 0.2 to 1 part by weight, and most preferably 0.2 to 0.5 parts by weight.
- the contact time between the poor solvent and the emulsion may be a time sufficient for the fine particles to precipitate, but in order to cause sufficient precipitation and to obtain efficient productivity, 5 minutes to 50 minutes after the addition of the poor solvent is completed. Time, more preferably 5 minutes or more and 10 hours or less, still more preferably 10 minutes or more and 5 hours or less, particularly preferably 20 minutes or more and 4 hours or less, and particularly preferably 30 minutes or more and 3 hours or less. Within hours.
- the polymer fine particle dispersion thus prepared is usually known in the art such as filtration, decantation, vacuum filtration, pressure filtration, centrifugation, centrifugal filtration, spray drying, acid precipitation method, salting out method, freeze coagulation method and the like.
- the fine particle powder can be recovered.
- the polymer fine particles that have been separated into solid and liquid are refined by washing with a solvent or the like to remove attached or contained impurities, if necessary.
- the preferred solvent is the above poor solvent, and more preferably one or more mixed solvents selected from water, methanol, and ethanol.
- the obtained particles can be dried to remove the residual solvent.
- the drying method include air drying, heat drying, reduced pressure drying, and freeze drying.
- the temperature for heating is preferably lower than the glass transition temperature, specifically 50-150 ° C.
- the organic solvent and the polymer B separated in the solid-liquid separation step performed when obtaining the fine particle powder can be used for recycling.
- the solvent obtained by solid-liquid separation is a mixture of polymer B, organic solvent and poor solvent.
- the method for removing the poor solvent is usually performed by a known method, and specific examples include simple distillation, vacuum distillation, precision distillation, thin film distillation, extraction, membrane separation, and the like. This is a method by distillation or precision distillation.
- distillation operations such as simple distillation and vacuum distillation
- it is preferable to carry out in a state free from oxygen as much as possible because heat is applied to the system and the thermal decomposition of the polymer B and the organic solvent may be accelerated.
- it is performed under an inert atmosphere. Specifically, it is carried out under nitrogen, helium, argon, carbon dioxide conditions.
- the residual amount of the poor solvent is 10% by mass or less, preferably 5% by mass with respect to the total amount of the organic solvent to be recycled and the polymer B. % Or less, more preferably 3% by mass or less, and particularly preferably 1% by mass or less.
- the particle size distribution of the fine particles becomes large or the particles aggregate, which is not preferable.
- the amount of the poor solvent in the solvent used for recycling can be measured by a generally known method, and can be measured by a gas chromatography method, a Karl Fischer method, or the like.
- the organic solvent, polymer B and the like may actually be lost, and therefore it is preferable to adjust the initial composition ratio as appropriate.
- the particle size of the fine particles thus obtained is usually 1000 ⁇ m or less, according to a preferred embodiment, 500 ⁇ m or less, according to a more preferred embodiment, 300 ⁇ m or less, and according to a further preferred embodiment, 100 ⁇ m or less, particularly preferred. According to an aspect, it is possible to manufacture a thing of 50 micrometers or less.
- the lower limit is usually 50 nm or more, according to a preferred embodiment, 100 nm or more, according to a more preferred embodiment, 500 nm or more, according to a further preferred embodiment, 1 ⁇ m or more, particularly preferred embodiment having a thickness of 10 ⁇ m or more. Can be manufactured.
- the particle size distribution is 3 or less as a particle size distribution index, and is 2 or less according to a preferred embodiment, 1.5 or less according to a more preferred embodiment, and 1 according to a particularly preferred embodiment. .2 or less, and according to the most preferred embodiment, it is possible to produce one that is 1.1 or less.
- the preferred lower limit is 1.
- the average particle diameter of the fine particles can be calculated by specifying an arbitrary 100 particle diameters from a scanning electron micrograph and calculating the arithmetic average thereof.
- the maximum diameter of the particle is taken as the particle diameter.
- it is measured at a magnification of at least 1000 times, preferably 5000 times or more.
- the particle size distribution index is determined based on the following numerical conversion formula for the particle diameter value obtained above.
- Ri particle size of individual particles
- n number of measurements 100
- Dn number average particle size
- Dv volume average particle size
- PDI particle size distribution index
- the fine particles obtained by this method are a method of producing fine particles via an emulsion composed of a polymer A solution phase and a polymer B solution phase, and thus have been particularly difficult to produce. It is suitable for producing fine particles made of an amorphous polymer having a particle size of 0.5 ⁇ m or more.
- amorphous polymers those having a glass transition temperature of 100 ° C. or higher, preferably 150 ° C. or higher, more preferably 180 ° C. or higher, and the upper limit is solubility. From the viewpoint of the above, those having a temperature of 400 ° C. or lower are preferable.
- polymer fine particles have many uses that require a high heat resistance of the material while reducing the particle size distribution, and vinyl polymers generally use cross-linking or special monomers.
- vinyl polymers generally use cross-linking or special monomers.
- novel polymer fine particles from the viewpoints of loss of thermoplasticity and poor versatility by these methods, and the present invention solves these problems. Therefore, it is preferable.
- the glass transition temperature refers to a temperature increase rate of 20 ° C./min up to a temperature 30 ° C. higher than the glass transition temperature predicted from 30 ° C. using a differential scanning calorimetry (DSC method). Temperature rise under temperature rise condition, hold for 1 minute, then cool to 0 ° C. under temperature drop condition at 20 ° C./minute, hold for 1 minute, and then observe when measured again under temperature rise condition at 20 ° C./minute Refers to the glass transition temperature (Tg).
- thermoplastic resins such as polyether sulfone, polycarbonate, amorphous non-fully aromatic polyamide, polyphenylene ether, polyether imide, amorphous polyarylate, polyamide imide, polyether ketone and the like that have not been obtained so far.
- polymer fine particles those having a small particle size distribution can be obtained, which is preferable.
- the present invention is suitable for producing polymer fine particles having a small particle size distribution, an average particle size exceeding 10 ⁇ m, and containing child particles inside the polymer fine particles.
- the preferred range of the polymer fine particles containing the child particles is more than 10 ⁇ m, more preferably 15 ⁇ m or more, further preferably 20 ⁇ m or more, and particularly preferably 25 ⁇ m or more. It is.
- the upper limit is 1000 ⁇ m or less, preferably 500 ⁇ m or less, more preferably 300 ⁇ m or less, and particularly preferably 100 ⁇ m or less.
- the child particles have an average particle size of 1/3 or less, more preferably 1/4 or less, more preferably 1/5 or less, and particularly preferably 1 / 8 or less, and remarkably preferably 1/10 or less.
- the size is suitable for incorporating the child particles into the polymer fine particles.
- the average particle diameter of the child particles can be measured with a particle size distribution meter or a scanning electron microscope before addition.
- the magnification is increased to such an extent that it can be observed, or observation is performed using a transmission electron microscope, and the determination is made by the same method.
- the length can be measured with a transmission electron microscope.
- the particle size of the child particles in the polymer fine particles is measured by observation with the ultrathin section for electron microscope. At this time, since the particle diameter on the photograph is not necessarily a cross section of the child particle at the equator plane, the maximum particle diameter on the photograph is the particle diameter of the child particle.
- Examples of the material of the child particles include inorganic particles and organic particles, but organic particles are particularly preferable, and rubber polymers are particularly preferable. Typical examples of such materials include fine particles such as rubbery polymers contained in ABS resins and the like. Further, in order to contain inorganic particles and other organic particles inside the fine particles, the above particles are mixed in advance with the polymer A and then dissolved in an organic solvent, or in an organic solvent dispersion of inorganic particles and organic particles, Examples thereof include a method of dissolving the polymer A. *
- a preferable aspect is 10 ⁇ m or more and 1000 ⁇ m or less, a more preferable aspect is 15 ⁇ m or more and 500 ⁇ m or less, and a further preferable aspect is 20 ⁇ m or more and 100 ⁇ m or less.
- particles having a size of 25 ⁇ m or more and 80 ⁇ m or less can be easily obtained.
- the fine particles created by the method of the present invention can be obtained as particles with a small particle size distribution, and can be applied to a polymer with excellent heat resistance, especially with fine particles that could not be obtained so far. Industrially, it can be used for various purposes.
- Comparative Example 6 Comparative Example 7 and Comparative Example 9 of International Patent Publication No. 2009/022591, and Examples 55 to 55 of International Patent Publication No. 2009/022591 59.
- Polymer A is an aromatic polyethersulfone having a hydroxyphenyl terminal functional group content of 60% or more and an aromatic polyethersulfone having a chlorophenyl terminal of 100%
- polymer B is polyvinyl alcohol
- Embodiments using “dimethyl sulfoxide, N-methylpyrrolidone” as the organic solvent can be excluded.
- PES particles The aromatic polyethersulfone particles (hereinafter abbreviated as PES particles) of the present invention precipitate PES particles in the presence of an aromatic polyethersulfone (hereinafter abbreviated as PES) in the presence of a surfactant having a number average molecular weight of 1000 or more.
- PES particles an aromatic polyethersulfone
- the PES used in the present invention has a structure represented by the general formula (a-1) and / or the general formula (a-2).
- R may be the same or different and represents any one selected from an alkyl group having 1 to 6 carbon atoms and an aryl group having 6 to 8 carbon atoms, and m is an integer of 0 to 3)
- Y represents any one selected from a direct bond, oxygen, sulfur, SO 2 , CO, C (CH 3 ) 2, CH (CH 3 ), and CH 2 )
- the molecular weight of PES has a reduced viscosity (method described in JIS K7367-1 (2002)) of 0.10 to 1.00 measured using an Ostwald capillary viscometer in DMF of PES at 25 ° C. and 1 g / dl. It is preferable to use those in the range.
- PES can be produced by a generally known method.
- PES manufactured by a well-known method the "ULTRASON E” series made from BASF Corporation, the “Sumika Excel” series produced by Sumitomo Chemical Co., Ltd., etc. can be used, for example.
- the surfactant used in the present invention is a surfactant having a number average molecular weight of 1000 or more.
- a more preferable range of the number average molecular weight of the surfactant is 2000 or more.
- the number average molecular weight said here is computed by contrasting with the calibration curve by polyethyleneglycol using a gel permeation chromatograph.
- Such a surfactant is not particularly limited as long as it is in the above range.
- polyacrylic acid, polymethacrylic acid, polystyrenesulfonic acid, poly (styrene-maleic acid) copolymer sodium polyacrylate, sodium polystyrenesulfonate, polyvinylpyrrolidone, polyethyleneimine, polyacrylamide, polymethacrylamide, polyvinylpyridine, Polyvinylpyridinium chloride, polyethylene glycol, fully saponified or partially saponified polyvinyl alcohol, fully saponified or partially saponified poly (vinyl alcohol-ethylene) copolymer, a copolymer containing the segment, anion, Cation, nonion, amphoteric synthetic compound, methylcellulose, carboxymethylcellulose, sodium carboxymethylcellulose, anion, cation, nonion, amphoteric semisynthetic compound, Cellulose, chitosan, sodium alginate, dextrin, casein, anio
- a method for precipitating PES in the presence of a surfactant for example, (1) A method in which PES is melted and precipitated by cooling, (2) A method of precipitating by dissolving PES in a solvent and removing the solvent, (3) A method of precipitating by dissolving PES in a solvent and adding a solvent incompatible with PES, (4) A method of precipitating by dissolving PES in a solvent, adding an incompatible solvent to a solvent dissolving PES and PES, forming an emulsion, and removing the solvent dissolving PES, Etc.
- any method may be used for the addition method and the addition procedure.
- a method in which PES is dissolved in a solvent and precipitated by adding a solvent incompatible with PES is preferably used.
- the first solvent of the present invention preferably has a PES solubility at 25 ° C. of 100% by mass.
- a solvent an aprotic polar solvent or an aprotic polar solvent and an aprotic polar solvent are compatible. And mixed solvents with other solvents.
- the aprotic polar solvent include N-methylpyrrolidone (NMP), N, N-dimethylformamide (DMF), N, N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, dimethyl sulfoxide. (DMSO) and 1 type, or 2 or more types of mixed solvents chosen from sulfolane are mentioned.
- the other solvent compatible with the aprotic polar solvent is one having a solubility in the aprotic polar solvent at 25 ° C. of 99% by mass or more.
- a solvent is not particularly limited as long as it is in the above range, but examples thereof include aliphatic hydrocarbon solvents such as pentane, hexane, heptane, octane, cyclohexane, cyclopentane, decane, dodecane, tridecane, and tetradecane, benzene, Aromatic hydrocarbon solvents such as toluene, xylene, 2-methylnaphthalene and cresol, ether solvents such as diethyl ether, tetrahydrofuran, diisopropyl ether and dioxane, ketone solvents such as acetone and methyl ethyl ketone, methanol, ethanol, isopropanol, n -Alcohol
- the surfactant is not limited as long as it has a number average molecular weight of 1000 or more, and examples include those described above.
- the saponified or partially saponified polyvinyl alcohol, the fully saponified or partially saponified poly (vinyl alcohol-ethylene) copolymer, polyethylene glycol, and polyvinyl pyrrolidone or It is a mixture of two or more.
- the addition amount of the surfactant is preferably 1 to 200 parts by mass, more preferably 30 to 200 parts by mass with respect to 100 parts by mass of PES.
- PES is not preferable because it is not in the form of particles but is obtained as coarse aggregates, and the particle size distribution tends to be widened.
- the surfactant is not preferable because it does not dissolve in the first solvent.
- the PES content of the homogeneous solution or suspension of PES is preferably 30 parts by mass or less, more preferably 20 parts by mass or less with respect to 100 parts by mass of the first solvent. When there is more PES content than the said range, PES is not a particle form and is obtained as a coarse aggregate, and is unpreferable.
- the temperature of the homogeneous solution or suspension of PES when the second solvent is added is preferably 0 to 100 ° C., more preferably 10 to 80 ° C.
- PES is not in the form of particles but is obtained as coarse aggregates, which is not preferable.
- a solvent having a solubility of PES at 25 ° C. of 1% by mass or less is used as the second solvent.
- solvents include aliphatic hydrocarbon solvents such as pentane, hexane, heptane, octane, cyclohexane, cyclopentane, decane, dodecane, tridecane, and tetradecane, benzene, toluene, xylene, and 2-methylnaphthalene.
- Aromatic hydrocarbon solvents such as diethyl ether, tetrahydrofuran, diisopropyl ether and dioxane, ketone solvents such as acetone and methyl ethyl ketone, alcohol solvents such as methanol, ethanol, isopropanol and n-propanol, ethyl acetate and acetic acid Esters such as methyl, butyl acetate, butyl propionate, butyl butyrate, halogens such as chloroform, bromoform, 1,2-dichloromethane, 1,2-dichloroethane, carbon tetrachloride, chlorobenzene Solvents include one or more of the mixed solvent selected from polar solvents and water, such as acetonitrile.
- the second solvent may contain the first solvent described above as long as the solubility of PES is 1% by mass or less.
- the amount of the second solvent added is preferably 10 parts by mass or more, more preferably 15 parts by mass or more with respect to 100 parts by mass of the homogeneous solution or suspension of PES. When the addition amount is less than the above range, PES particles do not precipitate.
- the addition rate of the second solvent is preferably 10 parts by mass or less, more preferably 5 parts by mass or less, with respect to 100 parts by mass of the homogeneous solution or suspension of PES.
- PES tends to be obtained as coarse aggregates rather than particles, which is not preferable.
- PES PES
- a surfactant PES
- a first solvent PES
- PES particles are precipitated, and a dispersion of PES particles. Can be obtained.
- Examples of the method for isolating the PES particles from the first solvent, the second solvent, and the surfactant include, for example, filtration, decantation, centrifugation, acid precipitation method, salting out method, spray drying method, freeze coagulation method, and the like. Is mentioned.
- washing solvent it is preferable to use a second solvent, more preferably one or more mixed solvents selected from water, methanol, and ethanol.
- the solvent after the solid-liquid separation is recovered and can be reused in the production process of PES particles or the washing process of PES particles, thereby improving the productivity.
- Examples of the method for drying PES particles include air drying, heat drying, reduced pressure drying, and freeze drying.
- the heating temperature is preferably lower than the glass transition temperature, specifically 50 to 150 ° C.
- PES particles can be obtained by the above method.
- PES particles having a uniform particle size distribution in the range of a number average particle size of 0.1 to 50 ⁇ m and a particle size distribution index of 1.0 to 1.5 can be obtained.
- a more preferable range of the number average particle diameter of the PES particles is 0.1 to 30 ⁇ m.
- the handleability may be lowered.
- the number average particle size is larger than the above range, the particle size distribution becomes wide, which is not preferable.
- the number average particle diameter of the PES particles is calculated from the following formula (1) by observing 100 arbitrary particles in a scanning electron micrograph and measuring the diameter. When the particle is not a perfect circle, the major axis is measured. In particular, the number average particle size of 10 to 50 ⁇ m can be obtained by the method of the present invention.
- a more preferable range of the particle size distribution index of the PES particles is 1.0 to 1.3. The closer the particle size distribution index is to 1, the more uniform the particles are. If the particle size distribution index is larger than the above range, the particle size distribution is widened, and it is not preferable because it does not have a uniform particle size. A uniform particle size is preferable because it may exhibit performance beyond expectation when applied to additives for polymer alloys, light diffusing agents, spacers for liquid crystals, toners, catalyst supports and the like.
- the particle size distribution index is calculated from the ratio of the volume average particle to the number average particle size according to the following formula (3).
- the volume average particle diameter is calculated from the following formula (2) by observing 100 arbitrary particles in a scanning electron micrograph, measuring the diameter. When the particle is not a perfect circle, the major axis is measured.
- Ri particle size of each particle
- n Number of measurements 100
- Dn number average particle diameter
- Dv Volume average particle diameter
- PDI Particle size distribution.
- the PES particles of the present invention include adhesives, paints, dispersions in printing inks, light diffusing agents, spacers for liquid crystals, matting agents, additives for polymer alloys, carriers for various catalysts, electrophotographic toners, chromatography It can be used for carriers, automobile parts, aircraft parts, electronic parts, cosmetic base materials, medical carriers and the like. In particular, since it has a uniform particle size distribution, when used in an additive for polymer alloys, a light diffusing agent, a spacer for liquid crystal, and a toner, an effect more than expected can be exhibited.
- the average particle diameter was calculated by measuring the diameter of 100 arbitrary particles from a photograph and calculating the arithmetic average thereof.
- the particle size distribution index indicating the particle size distribution was calculated based on the following numerical conversion formula for the individual particle diameter values obtained above.
- Ri particle diameter of individual particles
- n number of measurement 100
- Dn number average particle diameter
- Dv volume average particle diameter
- PDI particle diameter distribution index.
- the reduced viscosity ( ⁇ sp / c) was calculated based on the following description, and a value obtained by averaging five measured values was used.
- ⁇ sp / c (t ⁇ t 0 ) / t 0 / c t; passage time (in seconds) between marked lines in the polymer solution viscometer t 0 ; transit time (in seconds) between marked lines of viscometer of pure solvent c: concentration of polymer solution (g / dl).
- Example 1 Method for Producing Polyethersulfone Fine Particles>
- polyethersulfone as polymer A weight average molecular weight 67,000, Sumika Excel (registered trademark) 5003P manufactured by Sumitomo Chemical Co., Ltd.
- N-methyl-2- 45 g of pyrrolidone 2.5 g of polyvinyl alcohol as polymer B (“GOHSENOL (registered trademark)” GL-05, manufactured by Nippon Synthetic Chemical Industry Co., Ltd., weight average molecular weight 10,600, SP value 32.8 (J / cm 3 ) 1 / 2 ) was added, heated to 80 ° C., and stirred until the polymer was dissolved.
- GOHSENOL registered trademark
- Example 2 ⁇ Method 2 for producing polyethersulfone fine particles>
- polyethersulfone as polymer A weight average molecular weight 67,000, Sumika Excel (registered trademark) 5003P manufactured by Sumitomo Chemical Co., Ltd.
- N-methyl-2- Add 46.5 g of pyrrolidone and 1.0 g of polyvinyl alcohol as polymer B (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., “GOHSENOL (registered trademark)” GL-05), heat to 80 ° C., and stir until the polymer is dissolved It was.
- the obtained powder was observed with a scanning electron microscope, it was a true spherical fine particle shape, and was a polyethersulfone fine particle having an average particle size of 36.0 ⁇ m and a particle size distribution index of 1.25.
- the organic solvent, polymer A, and polymer B were separately dissolved and observed for standing, it was found that the system was separated into two phases, and the estimated interfacial tension of the system was 2 mN / m or less. It was.
- Example 3 ⁇ Method 3 for producing polyethersulfone fine particles>
- polyethersulfone as polymer A weight average molecular weight 67,000, Sumika Excel (registered trademark) 5003P manufactured by Sumitomo Chemical Co., Ltd.
- polymer B was added 2.5 g of polyvinyl alcohol (“GOHSENOL (registered trademark)” GL-05 manufactured by Nippon Synthetic Chemical Industry Co., Ltd.), heated to 80 ° C., and stirred until the polymer was dissolved.
- GOHSENOL registered trademark
- the obtained powder was observed with a scanning electron microscope, it was a polyethersulfone fine particle having a true spherical fine particle shape, an average particle size of 18.4 ⁇ m, and a particle size distribution index of 1.08.
- the organic solvent, polymer A, and polymer B were separately dissolved and observed for standing, it was found that the system was separated into two phases, and the estimated interfacial tension of the system was 2 mN / m or less. It was.
- Example 4 ⁇ Method 4 for producing polyethersulfone fine particles>
- polyethersulfone as polymer A weight average molecular weight 67,000, Sumika Excel (registered trademark) 5003P manufactured by Sumitomo Chemical Co., Ltd.
- N-methyl-2- 45 g of pyrrolidone and 2.5 g of polyvinyl alcohol (“GOHSENOL (registered trademark)” GL-05 manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) were added as polymer B, heated to 80 ° C., and stirred until the polymer was dissolved.
- Example 5 ⁇ Method 5 for Producing Polyethersulfone Fine Particles>
- 25 g of polyethersulfone as polymer A weight average molecular weight 67,000, Sumika Excel (registered trademark) 5003P manufactured by Sumitomo Chemical Co., Ltd.
- GOHSENOL registered trademark
- the obtained powder was observed with a scanning electron microscope, it was a polyethersulfone fine particle having a true spherical fine particle shape, an average particle size of 19.7 ⁇ m, and a particle size distribution index of 1.06. Moreover, when this organic solvent, the polymer A, and the polymer B were melt
- Example 6 Method for Producing Polycarbonate Fine Particles>
- polycarbonate as polymer A (weight average molecular weight 45,000 “Iupilon (registered trademark)” E2000 manufactured by Mitsubishi Engineering Plastics)
- polyvinyl alcohol (“GOHSENOL (registered trademark)” GL-05 manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) was added as polymer B, heated to 80 ° C., and stirred until the polymer was dissolved.
- Example 7 Method for Producing ABS (Acrylonitrile-Butadiene-Styrene) Resin Fine Particles>
- an ABS resin weight average molecular weight 110,000, Toyolac (registered trademark) T100, poly (acrylonitrile-styrene) copolymer manufactured by Toray Industries, Inc.) as a matrix and an average particle diameter 2.5 g of 300-nm rubber-containing graft copolymer dispersed
- 45 g of N-methyl-2-pyrrolidone as an organic solvent
- 2.5 g of polyvinyl alcohol as polymer B (Nippon Gosei Chemical Co., Ltd., Gohsenol (registered trademark)) 'GL-05) was added, heated to 80 ° C., and stirred until the polymer was dissolved.
- ABS fine particle having an average particle size of 28.6 ⁇ m and a particle size distribution index of 1.19.
- An ultra-thin section for an electron microscope was prepared for cross-sectional observation of this particle and observed with a transmission electron microscope. As shown in FIG. 5, it was a structure having child particles inside the particle. The particle diameter of the child particles was 0.92 ⁇ m, and the particle diameter ratio of the child particles / polymer fine particles was 0.033. The heat of fusion of ABS used in this example was not observed, and the SP value of this polymer was 24.3 (J / cm 3 ) 1/2 as calculated from the calculation method as poly (acrylonitrile-styrene). .
- Example 8 ⁇ Production Method 1 of Polyamide Particles>
- amorphous polyamide weight average molecular weight 18,000 Emzavelke's “Grillamide (registered trademark)” TR55
- polymer B 25 g of polyvinyl alcohol (Nippon Synthetic Chemical Industry Co., Ltd., “GOHSENOL (registered trademark)” GL-05) was added, heated to 80 ° C., and stirred until the polymer was dissolved.
- FIG. 6 shows an optical micrograph of the emulsion formed by simply vibrating this separately prepared two-phase separation system.
- the solubility (room temperature) of the amorphous polyamide in water which is a poor solvent was 0.1% by mass or less.
- Example 9 ⁇ Method for Producing Polyphenylene Ether Particles>
- poly (2,6-dimethylphenylene ether) as polymer A weight average molecular weight 55,000
- 45 g of N-methyl-2-pyrrolidone as an organic solvent
- polyvinyl as polymer B 2.5 g of alcohol (Nippon Synthetic Chemical Industry Co., Ltd. 'GOHSENOL (registered trademark)' GL-05) was added, and the mixture was heated to 80 ° C. and stirred until all the polymers were dissolved.
- Example 10 ⁇ Method for Producing Polyetherimide Particles>
- polyetherimide as polymer A (weight average molecular weight 55,000 ULTEM 1010 manufactured by GE Plastics)
- 45 g of N-methyl-2-pyrrolidone as an organic solvent 45 g
- polyvinyl alcohol as polymer B
- 2.5 g Nippon Synthetic Chemical Industry Co., Ltd. 'GOHSENOL (registered trademark)' GL-05
- the obtained powder was observed with a scanning electron microscope, it was a spherical shape, and was a polyetherimide fine particle having an average particle size of 0.7 ⁇ m and a particle size distribution index of 1.13.
- the heat of fusion of the polyetherimide used in this example was not observed, and the SP value of this polymer was 24.0 (J / cm 3 ) 1/2 from the experimental method.
- this organic solvent, the polymer A, and the polymer B were melt
- the solubility (room temperature) of polyetherimide in water which is a poor solvent was 0.1% by mass or less.
- Example 11 ⁇ Method for Producing Polyacrylonitrile Particles>
- polyacrylonitrile as polymer A weight average molecular weight 610,000, manufactured by Aldrich
- dimethyl sulfoxide as organic solvent
- polyvinyl alcohol as polymer B (Nippon Synthetic Chemical Industry) “GOHSENOL (registered trademark)” GL-05) was added, and the mixture was heated to 80 ° C. and stirred until all the polymers were dissolved.
- the obtained powder was observed with a scanning electron microscope, it was a polyacrylonitrile fine particle having a true spherical shape, an average particle size of 16.8 ⁇ m, and a particle size distribution index of 1.15.
- the heat of fusion of the polyacrylonitrile used in this example was not observed, and the SP value of this polymer was 29.5 (J / cm 3 ) 1/2 from the calculation method.
- this organic solvent, the polymer A, and the polymer B were melt
- the solubility (room temperature) of polyacrylonitrile in water which is a poor solvent was 0.1% by mass or less.
- Example 12 ⁇ Production Method 2 of Polyamide Fine Particles>
- amorphous polyamide as polymer A weight average molecular weight 12,300, “Grillamide (registered trademark)” TR90 manufactured by Mzavelke
- formic acid Wako Pure Chemical Industries, Ltd.
- 2.1 g of polyvinyl alcohol as polymer B Nippon Synthetic Chemical Industry Co., Ltd. “GOHSENOL (registered trademark)” GM-14 Weight average molecular weight 22,000, SP value 32.8 (J / cm 3 ) 1 / 2 ) was added, heated to 80 ° C., and stirred until the polymer was dissolved.
- Example 13 ⁇ Production Method 3 for Polyamide Fine Particles>
- polyamide as polymer A weight average molecular weight: 17,000, “TROGAMID (registered trademark)” CX7323 manufactured by Degusa
- 27.6 g of formic acid as an organic solvent polyvinyl alcohol as polymer B 1.2 g (Nippon Synthetic Chemical Industry Co., Ltd. 'GOHSENOL (registered trademark)' GM-14, SP value 32.8 (J / cm 3 ) 1/2 ) was added and heated to 80 ° C until the polymer dissolved Stirring was performed.
- the suspension returned to room temperature was filtered, washed with 50 g of ion exchange water, and vacuum-dried at 80 ° C. for 10 hours to obtain 1.1 g of a white solid.
- the obtained powder was polyamide fine particles having an average particle size of 13.4 ⁇ m and a particle size distribution index of 1.1.
- the heat of fusion of the polyamide used in this example was 9.4 J / g, and the SP value of this polymer was 23.3 (J / cm 3 ) 1/2 from the calculation method.
- Example 14 ⁇ Method 4 for Producing Fine Particles Composed of Mixture of Polyamide and Epoxy Resin>
- polyamide weight average molecular weight 17,000, 'TROGAMID (registered trademark)' CX7323
- jER bisphenol A type epoxy resin
- jER bisphenol A type epoxy resin
- jER bisphenol A type epoxy resin
- jER bisphenol A type epoxy resin
- jER polyamidoamine
- Tomide registered trademark
- # 296 Fluji Kasei Kogyo Co., Ltd.
- formic acid 27.6 g as an organic solvent.
- the heat of fusion of the polyamide used in this example was 9.4 J / g, and the SP value of this polymer was 23.3 (J / cm 3 ) 1/2 from the calculation method.
- the volume ratio was 1/9 or less (polymer A solution phase / polymer B solution phase (volume ratio)). It turns out to separate.
- Example 15 (Production Method of Polymer Fine Particles with Recycle Solvent)
- the filtrate obtained in Example 5 was distilled off water contained in the system under a nitrogen atmosphere under reduced pressure conditions of 80 ° C. and 20 kPa.
- Water was distilled off with a moisture measuring device (moisture measuring device CA-06 manufactured by Mitsubishi Chemical Corporation) so that the water content in the system was 1% by mass or less. What is the amount of water at this time? It was 0.85 mass%.
- the concentration of polyvinyl alcohol was 5.6% by mass.
- Example 16 (Production Method of Polyamideimide Fine Particles)
- polyamideimide as polymer A (weight average molecular weight 66,000, TI 5013E-P manufactured by Toray)
- polyvinyl alcohol 2 as polymer B 2 0.5 g (Nippon Synthetic Chemical Industry Co., Ltd. 'GOHSENOL (registered trademark)' GL-05) was added, and the mixture was heated to 80 ° C and stirred until all the polymers were dissolved.
- Example 17 (Method for producing polyarylate fine particles)
- polyarylate as polymer A (weight average molecular weight 24,000, Upolymer U-100 manufactured by Unitika)
- polyvinyl alcohol as polymer B
- Comparative Example 1 Particle Synthesis 1 without Phase Separation
- polyethersulfone as polymer A weight average molecular weight 67,000, Sumika Excel (registered trademark) 5003P manufactured by Sumitomo Chemical Co., Ltd.
- N-methyl-2- Stirring was performed for 4 hours without adding 47.5 g of pyrrolidone and polymer B.
- the system was in a uniform state.
- 50 g of ion-exchanged water as a poor solvent was dropped at a speed of 1 g / min via a liquid feed pump. As a result, coarse agglomerates were formed, and stirring was immediately stopped. Particulate matter was not obtained.
- Comparative Example 2 Particle Synthesis 2 without Phase Separation
- polyethersulfone as polymer A (weight average molecular weight 67,000, Sumika Excel (registered trademark) 5003P manufactured by Sumitomo Chemical Co., Ltd.) and N-methyl-2- 47 g of pyrrolidone and 0.5 g of polyvinyl alcohol (Nippon Synthetic Chemical Industry Co., Ltd. “GOHSENOL (registered trademark)” GL-05) were added as polymer B, and the mixture was heated to 80 ° C. and stirred until all the polymers were dissolved. At this time, the system was in a uniform state.
- Comparative Example 3 Particle Synthesis 3 without Phase Separation
- polyethersulfone as polymer A weight average molecular weight 67,000, Sumika Excel (registered trademark) 5003P manufactured by Sumitomo Chemical Co., Ltd.
- N-methyl-2- 47 g of pyrrolidone and 2.5 g of octylphenoxypolyethoxyethanol weight average molecular weight 11200, number average molecular weight 8000
- the obtained slurry solution was filtered off, and the residue was washed with 100 g of water three times. Thereafter, vacuum drying was performed at a temperature of 80 ° C. to obtain 1.0 g of PES particles.
- the number average particle size was 0.3 ⁇ m
- the volume average particle size was 38.0 ⁇ m
- the particle size distribution index was 128.
- the fine particles created by the method of the present invention can be obtained as particles with a small particle size distribution, and can be applied to polymers with excellent heat resistance, in particular, with fine particles with polymers that could not be obtained so far.
- paste resins for plastic sols powder blocking materials, powder flowability improvers, adhesives, paints, and various printing inks Dispersions, lubricants, rubber compounding agents, abrasives, thickeners, filter agents and filter aids, gelling agents, flocculants, paint additives, oil absorbents, release agents, plastic film / sheet slip properties
- improvements such as improvers, antiblocking agents, gloss modifiers, matte finishes, light diffusing agents, surface high hardness improvers, toughness improvers, polymer alloy additives, etc.
- Agents spacers for liquid crystal display devices, chromatographic fillers / carriers, base materials / additives for cosmetic foundations, auxiliary agents for microcapsules, medical materials such as drug delivery systems / diagnostics, fragrance / pesticide retention agents, Used for catalyst for chemical reaction and its support, gas adsorbent, sintered material for ceramic processing, standard particle for measurement and analysis, particle for food industry, powder coating material, toner for electrophotographic development it can.
- resin fine particles colored by adding various dyes such as acid dyes, basic dyes, fluorescent dyes, fluorescent brighteners, and cured resin spherical fine particles.
- the colored fine particles can also be used as pigments for paints, inks, and plastics.
- the method for producing aromatic polyethersulfone particles according to the second invention of the present invention makes it possible to easily produce aromatic polyethersulfone particles, and further has an aromatic particle having a uniform particle size distribution. It becomes possible to obtain polyethersulfone particles.
- the aromatic polyethersulfone particles obtained by the present invention are adhesives, paints, dispersions in printing inks, light diffusing agents, spacers for liquid crystals, matting agents, additives for polymer alloys, carriers for various catalysts, It can be used for electrophotographic toners, chromatographic carriers, automobile parts, aircraft parts, electronic parts, cosmetic base materials and medical carriers.
- an additive for polymer alloys, a light diffusing agent, a spacer for liquid crystal, and a toner an effect more than expected can be exhibited.
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Abstract
Description
第1の発明として、
「(1)ポリマーAとポリマーBと有機溶媒とを溶解混合したときに、ポリマーAを主成分とする溶液相と、ポリマーBを主成分とする溶液相の2相に相分離する系において、エマルジョンを形成させた後、ポリマーAの貧溶媒を接触させることにより、ポリマーAを析出させることを特徴とするポリマー微粒子の製造方法、
(2)ビニル系重合体、ポリカーボネート、ポリアミド、ポリフェニレンエーテル、ポリエーテルイミド、非晶ポリアリレート、ポリアミドイミド、エポキシ樹脂のうちから選ばれる少なくとも1種以上のポリマーAとポリマーBと有機溶媒とを溶解混合したときに、ポリマーAを主成分とする溶液相と、ポリマーBを主成分とする溶液相の2相に相分離する系において、エマルジョンを形成させた後、ポリマーAの貧溶媒を接触させることにより、ポリマーAを析出させることを特徴とするポリマー微粒子の製造方法。」であり、
第2の発明として、
「(3)一般式(a-1)および/または一般式(a-2)で表される構造を有する芳香族ポリエーテルスルホンを数平均分子量が1000以上の界面活性剤の共存下で、芳香族ポリエーテルスルホン粒子を析出させることを特徴とする芳香族ポリエーテルスルホン粒子の製造方法、
第1の発明と第2の発明から生み出される、発明として、
「(4)粒子径分布指数が2以下であり、かつ平均粒子径が0.5μm以上であり、かつ非晶性ポリマーであることを特徴とするポリマー微粒子、
(5)粒子径分布指数が2以下であり、かつポリエーテルスルホン、ポリカーボネート、非晶非全芳香族ポリアミド、ポリフェニレンエーテル、ポリエーテルイミド、非晶ポリアリレート、ポリアミドイミド、ポリエーテルケトン、エポキシ樹脂の中から選ばれる少なくとも1種からなることを特徴とするポリマー微粒子、
(6)粒子径分布指数が2以下であり、かつ平均粒子径が10μm超であり、かつポリマー微粒子の内部に子粒子を包含することを特徴とするポリマー微粒子、
(7)粒子径分布指数が2以下であり、かつその平均粒子径が、20μm以上であり、さらにポリマーが、ビニル系ポリマーであることを特徴とするポリマー微粒子
(8)数平均粒子径が0.1~50μm、粒子径分布指数が1.0~1.5であることを特徴とする芳香族ポリエーテルスルホン粒子。」となる。
[ヒドロキシフェニル末端基組成(モル%)]=
[1HOHのピーク面積]/([1HOHのピーク面積]+[1HClのピーク面積]×100
[クロロフェニル末端基組成(モル%)]=
[1HClのピーク面積]/([1HOHのピーク面積]+[1HClのピーク面積]×100
この際、ポリマーA、B、これらを溶解する有機溶媒を混合溶解させた液は、ポリマーAを主成分とする溶液相と、ポリマーBを主成分とする溶液相の2相に相分離することが必要である。
この範囲よりも短い時間で実施すると、エマルジョンの凝集・融着・合一に伴い、粒子径分布が大きくなったり、塊状物が生成する場合がある。また、これ以上長い時間で実施する場合は、工業的な実施を考えた場合、非現実的である。
(1)PESを溶融させ、冷却することにより析出させる方法、
(2)PESを溶媒に溶解させ、溶媒を除去することにより析出させる方法、
(3)PESを溶媒に溶解させ、PESと非相溶の溶媒を加えることにより析出させる方法、
(4)PESを溶媒に溶解さえ、PESとPESを溶解する溶媒に非相溶の溶媒を加え、エマルジョンを形成させ、PESを溶解する溶媒を除去することにより析出させる方法、
等が挙げられる。
Ri:粒子個々の粒子径、
n:測定数100、
Dn:数平均粒子径、
Dv:体積平均粒子径、
PDI:粒子径分布、とする。
微粒子の個々の粒子径は、走査型電子顕微鏡(日本電子株式会社製走査型電子顕微鏡JSM-6301NF)にて、微粒子を1000倍で観察し、測長した。尚、粒子が真円でない場合は、長径をその粒子径として測定した。
粒子断面の観察のために、透過型電子顕微鏡(日立製作所株式会社製 H-7100)を用いて測定を行った。
ポリマー微粒子を電子顕微鏡用エポキシ樹脂で固めたのち、透過型電子顕微鏡用試料を切削し、透過型電子顕微鏡で分散構造の観察を行い、粒子の存在を確認し、任意の100個の子粒子の径を測定し、最大値を子粒子径とした。
協和界面科学株式会社 自動接触角計 DM-501を装置として用い、懸滴法により、ポリマーA溶液相、ポリマーB溶液相について、各相と空気との表面張力を測定した。得られた各相の表面張力の結果をr1、r2とし、その差である(r1-r2)の絶対値から界面張力を算出した。
リサイクル溶媒中の水分を測定するにあたり、カールフィッシャー法(機種名:水分測定機 CA-06 三菱化学社製)を用い測定した。
エポキシ樹脂とポリアミドの混合粒子の定性のために、赤外分光光度計(パーキンエルマージャパン株式会社製 System2000)を用い定性を行った。
還元粘度は、JIS K7367-1(2002)に記載の方法で、オストワルド毛細管粘度計を用い、ジメチルホルムアミド(DMF)中、25℃、1g/dlの条件で測定した。
ηsp/c=(t-t0)/t0/c
t;重合体溶液の粘度計における標線間の通過時間(秒)
t0;純溶媒の粘度計の標線間の通過時間(秒)
c;重合体溶液の濃度(g/dl)。
界面活性剤の数平均分子量は、ゲルパーミエーションクロマトグラフィー法を用い、ポリエチレングリコールによる校正曲線と対比させて分子量を算出した。
装置 :株式会社島津製作所製 LC-10Aシリーズ
カラム:昭和電工株式会社製GF-7MHQ
移動相:水
流速 :1.0ml/min
検出 :示差屈折率計。
100mlの4口フラスコの中に、ポリマーAとしてポリエーテルスルホン 2.5g(重量平均分子量 67,000 住友化学株式会社製 ‘スミカエクセル(登録商標)’5003P)、有機溶媒としてN-メチル-2-ピロリドン 45g、ポリマーBとしてポリビニルアルコール 2.5g(日本合成化学工業株式会社製 ‘ゴーセノール(登録商標)’GL-05、重量平均分子量 10,600、SP値32.8(J/cm3)1/2)を加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌しながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由して、0.41g/分のスピードで滴下した。約12gのイオン交換水を加えた時点で、系が白色に変化した。全量の水を入れ終わった後に、30分間攪拌し、得られた懸濁液を、ろ過し、イオン交換水 100gで洗浄し、濾別したものを、80℃ 10時間真空乾燥を行い、白色固体を2.0g得た。得られた粉体を走査型電子顕微鏡にて観察したところ、真球状の微粒子形状(図2)であり、平均粒子径 18.7μm、粒子径分布指数 1.07のポリエーテルスルホン微粒子であった。なお、本実施例で用いたポリエーテルスルホンの融解熱量は観測されず、このポリマーのSP値は、実験法により求め、25.8(J/cm3)1/2だった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、体積比 3/7(ポリマーA溶液相/ポリマーB溶液相(体積比))で2相分離することが分かり、本系の界面張力の推算値は、2mN/m以下であった。貧溶媒である水に対するポリエーテルスルホンの溶解度(室温)は、0.1質量%以下であった。
100mlの4口フラスコの中に、ポリマーAとしてポリエーテルスルホン 2.5g(重量平均分子量 67,000 住友化学株式会社製 ‘スミカエクセル(登録商標)’5003P)、有機溶媒としてN-メチル-2-ピロリドン 46.5g、ポリマーBとしてポリビニルアルコール 1.0g(日本合成化学工業株式会社製、‘ゴーセノール(登録商標)’GL-05)を加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌しながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由して、0.41g/分のスピードで滴下した。約12gのイオン交換水を加えた時点で、系が白色に変化した。全量の水を入れ終わった後に、30分間攪拌し、得られた懸濁液を、ろ過し、イオン交換水 100gで洗浄し、濾別したものを、80℃ 10時間真空乾燥を行い、白色固体2.1gを得た。得られた粉体を走査型電子顕微鏡にて観察したところ、真球状の微粒子形状であり、平均粒子径 36.0μm、粒子径分布指数 1.25のポリエーテルスルホン微粒子であった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、2相分離することが分かり、本系の界面張力の推算値は、2mN/m以下であった。
100mlの4口フラスコの中に、ポリマーAとしてポリエーテルスルホン 2.5g(重量平均分子量 67,000 住友化学株式会社製 ‘スミカエクセル(登録商標)’5003P)、有機溶媒としてジメチルスルホキシド 45g、ポリマーBとしてポリビニルアルコール 2.5g(日本合成化学工業株式会社製 ‘ゴーセノール(登録商標)’GL-05)を加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌しながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由して、0.41g/分のスピードで滴下した。約12gのイオン交換水を加えた時点で、系が白色に変化した。全量の水を入れ終わった後に、30分間攪拌し、得られた懸濁液を、ろ過し、イオン交換水 100gで洗浄し、濾別したものを、80℃ 10時間真空乾燥を行い、白色固体2.2gを得た。得られた粉体を走査型電子顕微鏡にて観察したところ、真球状の微粒子形状であり、平均粒子径 18.4μm、粒子径分布指数 1.08のポリエーテルスルホン微粒子であった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、2相分離することが分かり、本系の界面張力の推算値は、2mN/m以下であった。
100mlの4口フラスコの中に、ポリマーAとしてポリエーテルスルホン 2.5g(重量平均分子量 67,000 住友化学株式会社製 ‘スミカエクセル(登録商標)’5003P)、有機溶媒としてN-メチル-2-ピロリドン 45g、ポリマーBとしてポリビニルアルコール 2.5g(日本合成化学工業株式会社製 ‘ゴーセノール(登録商標)’GL-05)を加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌しながら、貧溶媒として50gのメタノールを、送液ポンプを経由して、0.41g/分のスピードで滴下した。約10gのメタノールを加えた時点で、系が白色に変化した。全量のメタノールを入れ終わった後に、30分間攪拌し、得られた懸濁液を、ろ過し、イオン交換水 100gで洗浄し、濾別したものを、80℃ 10時間真空乾燥を行い、2.2gの白色固体を得た。得られた粉体を走査型電子顕微鏡にて観察したところ、真球状の微粒子形状であり、平均粒子径 22.9μm、粒子径分布指数 1.09のポリエーテルスルホン微粒子であった。
1000mlの4口フラスコの中に、ポリマーAとしてポリエーテルスルホン 25g(重量平均分子量 67,000 住友化学株式会社製 ‘スミカエクセル(登録商標)’5003P)、有機溶媒としてN-メチル-2-ピロリドン 450g、ポリマーBとしてポリビニルアルコール 25g(日本合成化学工業株式会社製 ‘ゴーセノール(登録商標)’GL-05)を加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌しながら、貧溶媒として500gのイオン交換水を、送液ポンプを経由して、4.1g/分のスピードで滴下した。約130gのイオン交換水を加えた時点で、系が白色に変化した。全量の水を入れ終わった後に、30分間攪拌し、得られた懸濁液を、ろ過し、イオン交換水 900gで洗浄し、濾別したものを、80℃ 10時間真空乾燥を行い、22.1gの白色固体を得た。ここでの濾液は、実施例15へと供した。得られた粉体を走査型電子顕微鏡にて観察したところ、真球状の微粒子形状であり、平均粒子径 19.7μm、粒子径分布指数 1.06のポリエーテルスルホン微粒子であった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、2相分離することが分かった。
100mlの4口フラスコの中に、ポリマーAとしてポリカーボネート 2.5g(重量平均分子量 45,000 三菱エンジニアリングプラスチック株式会社製 ‘ユーピロン(登録商標)’E2000)、有機溶媒としてN-メチル-2-ピロリドン 45g、ポリマーBとしてポリビニルアルコール 2.5g(日本合成化学工業株式会社製‘ゴーセノール(登録商標)’ GL-05)を加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌しながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由して、0.41g/分のスピードで滴下した。約12gのイオン交換水を加えた時点で、系が白色に変化した。全量の水を入れ終わった後に、30分間攪拌し、得られた懸濁液を、ろ過し、イオン交換水 100gで洗浄し、濾別したものを、80℃ 10時間真空乾燥を行い、2.15gの白色固体を得た。得られた粉体を走査型電子顕微鏡にて観察したところ、表面に凸凹のある形状の微粒子(図3)であり、平均粒子径 9.6μm、粒子径分布指数1.12のポリカーボネート微粒子であった。なお、本実施例で用いたポリカーボネートの融解熱量は観測されず、このポリマーのSP値は、23.0(J/cm3)1/2だった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、ポリマーA相とポリマーB相は2相分離することが分かった。貧溶媒である水に対するポリカーボネートの溶解度(室温)は、0.1質量%以下であった。
100mlの4口フラスコの中に、ポリマーAとしてABS樹脂(重量平均分子量 110,000 東レ株式会社製‘トヨラック(登録商標)’T100、ポリ(アクリロニトリル-スチレン)共重合体をマトリックスとし、平均粒子径300nmのゴム含有グラフト共重合体が分散したもの)2.5g、有機溶媒としてN-メチル-2-ピロリドン45g、ポリマーBとしてポリビニルアルコール2.5g(日本合成化学工業株式会社‘ゴーセノール(登録商標)’ GL-05)を加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌しながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由して、0.41g/分のスピードで滴下した。約12gのイオン交換水を加えた時点で、系が白色に変化した。全量の水を入れ終わった後に、30分間攪拌し、得られた懸濁液を、ろ過し、イオン交換水 100gで洗浄し、濾別したものを80℃ 10時間真空乾燥を行い、1.85gの白色固体を得た。得られた粉体を走査型電子顕微鏡にて観察したところ、真球状(図4)の形状をしており、平均粒子径 28.6μm、粒子径分布指数1.19のABS微粒子であった。この粒子の断面観察のために電子顕微鏡用超薄切片を作成し、透過型電子顕微鏡にて観察を行ったところ、図5に示すとおり、粒子内部に子粒子を有する構造であり、本写真より子粒子の粒子径は、0.92μm、子粒子の粒子径/ポリマー微粒子の粒子径比は0.033であった。なお、本実施例で用いたABSの融解熱量は観測されず、このポリマーのSP値は、ポリ(アクリロニトリル-スチレン)として、計算法より、24.3(J/cm3)1/2だった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系は2相分離することが分かった。貧溶媒である水に対する、ABSの溶解度(室温)は、0.1質量%以下であった。
100mlの4口フラスコの中に、ポリマーAとして非晶ポリアミド (重量平均分子量 18,000エムザベルケ社製‘グリルアミド(登録商標)’TR55) 2.5g、有機溶媒としてN-メチル-2-ピロリドン 45g、ポリマーBとしてポリビニルアルコール 25g(日本合成化学工業株式会社‘ゴーセノール(登録商標)’ GL-05)を加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌しながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由し、0.41g/分のスピードで滴下を行った。12gのイオン交換水を加えた時点で、系が白色に変化した。全量の水を入れ終わった後に、30分間攪拌し、得られた懸濁液を、ろ過し、イオン交換水 100gで洗浄し、80℃ 10時間真空乾燥を行い、白色固体2.25gを得た。得られた粉体を走査型電子顕微鏡にて観察したところ図6に示すように真球状の微粒子であり、平均粒子径 24.3μm、粒子径分布指数1.13の非晶ポリアミドの微粒子であった。なお、本実施例で用いた非晶ポリアミドの融解熱量は観測されず、このポリマーのSP値は、計算法より、23.3(J/cm3)1/2だった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、体積比 3/7 (ポリマーA溶液相/ポリマーB溶液相(体積比))で2相分離することが分かり、本系の界面張力の推算値2mN/m以下であった。この別途作成した2相分離系を簡易的に振動させ、形成されたエマルジョンの光学顕微鏡写真を図7に示す。貧溶媒である水に対する、非晶ポリアミドの溶解度(室温)は、0.1質量%以下であった。
100mlの4口フラスコの中に、ポリマーAとしてポリ(2,6-ジメチルフェニレンエーテル)2.5g(重量平均分子量 55,000)、有機溶媒としてN-メチル-2-ピロリドン 45g、ポリマーBとしてポリビニルアルコール 2.5g(日本合成化学工業株式会社 ‘ゴーセノール(登録商標)’GL-05)を加え、80℃に加熱し全てのポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌しながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由し、0.41g/分のスピードで滴下を行った。12gのイオン交換水を加えた時点で、系が白色に変化した。全量の水を入れ終わった後に、30分間攪拌し、得られた懸濁液を、ろ過し、イオン交換水 100gで洗浄し、80℃ 10時間真空乾燥を行い、白色固体2.25gを得た。得られた粉体を走査型電子顕微鏡にて観察したところ、平均粒子径 8.6μm、粒子径分布指数1.11のポリ(2,6-ジメチルフェニレンエーテル)微粒子であった。なお、本実施例で用いたポリフェニレンエーテルの融解熱量は観測されず、このポリマーのSP値は、計算法より、20.7(J/cm3)1/2だった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、ポリマーA溶液相とポリマーB溶液相は、2相分離することが分かった。貧溶媒である水に対するポリフェニレンエーテルの溶解度(室温)は、0.1質量%以下であった。
100mlの4口フラスコの中に、ポリマーAとしてポリエーテルイミド 2.5g(重量平均分子量 55,000 ジーイープラスチック社製ウルテム1010)、有機溶媒としてN-メチル-2-ピロリドン 45g、ポリマーBとしてポリビニルアルコール 2.5g(日本合成化学工業株式会社 ‘ゴーセノール(登録商標)’GL-05)を加え、80℃に加熱し全てのポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌をしながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由し、0.41g/分のスピードで滴下を行った。12gのイオン交換水を加えた時点で、系が白色に変化した。全量の水を入れ終わった後に、30分間攪拌した。さらに水を50g一括で添加し、得られた懸濁液を、遠心分離機にて、重力加速度の20000倍にて20分間、遠心分離を行い、上澄み液を取り除いた。得られた固形分を、ろ過し、イオン交換水 100gで洗浄し、80℃ 10時間真空乾燥を行い、白色固体2.1gを得た。得られた粉体を走査型電子顕微鏡にて観察したところ、真球状であり、平均粒子径 0.7μm、粒子径分布指数1.13のポリエーテルイミド微粒子であった。なお、本実施例で用いたポリエーテルイミドの融解熱量は観測されず、このポリマーのSP値は、実験法より、24.0(J/cm3)1/2だった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、ポリマーA溶液相とポリマーB溶液相は、2相分離することが分かった。貧溶媒である水に対するポリエーテルイミドの溶解度(室温)は、0.1質量%以下であった。
100mlの4口フラスコの中に、ポリマーAとしてポリアクリロニトリル 2.5g(重量平均分子量 610,000、アルドリッチ社製)、有機溶媒としてジメチルスルホキシド 45g、ポリマーBとしてポリビニルアルコール 2.5g(日本合成化学工業株式会社‘ゴーセノール(登録商標)’ GL-05)を加え、80℃に加熱し全てのポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌をしながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由し、0.41g/分のスピードで滴下を行った。12gのイオン交換水を加えた時点で、系が白色に変化した。全量のイオン交換水を入れ終わった後に、30分間攪拌し、得られた懸濁液を、ろ過し、イオン交換水 100gで洗浄し、80℃ 10時間真空乾燥を行い、白色固体2.0gを得た。得られた粉体を走査型電子顕微鏡にて観察したところ、真球状であり、平均粒子径 16.8μm、粒子径分布指数1.15の ポリアクリロニトリル微粒子であった。なお、本実施例で用いたポリアクリロニトリルの融解熱量は観測されず、このポリマーのSP値は、計算法より、29.5(J/cm3)1/2だった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、ポリマーA溶液相とポリマーB溶液相は、2相分離することが分かった。貧溶媒である水に対するポリアクリロニトリルの溶解度(室温)は、0.1質量%以下であった。
100mlの4口フラスコの中に、ポリマーAとして非晶ポリアミド(重量平均分子量 12,300、エムザベルケ社製 ‘グリルアミド(登録商標)’ TR90)2.1g、有機溶媒としてギ酸(和光純薬工業株式会社製)25.8g、ポリマーBとしてポリビニルアルコール2.1g(日本合成化学工業株式会社 ‘ゴーセノール(登録商標)’GM-14 重量平均分子量 22,000、SP値32.8(J/cm3)1/2)を加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、900rpmで攪拌をしながら、貧溶媒として60gのイオン交換水を、送液ポンプを経由し、0.05g/分のスピードで滴下を開始した。徐々に滴下速度を上げながら滴下し、全量を90分かけて滴下した。10gのイオン交換水を入れた時に系が白色に変化した。半分量のイオン交換水を滴下した時点で系の温度を60℃まで昇温させ、引き続き、残りのイオン交換水を入れ、全量滴下した後に、引き続き30分間攪拌した。室温に戻した懸濁液を、ろ過し、イオン交換水50gで洗浄し、80℃ 10時間真空乾燥を行い、白色固体を2.0g得た。得られた粉体を走査型電子顕微鏡にて、観察したところ、平均粒子径 9.2μm、粒子径分布指数1.46の非晶ポリアミド微粒子であった。なお、本実施例で用いた非晶ポリアミドの融解熱量は観測されず、このポリマーのSP値は、計算法より21.2(J/cm3)1/2だった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、体積比 1/9以下(ポリマーA溶液相/ポリマーB溶液相(体積比))で2相分離することが分かった。貧溶媒である水に対するこの非晶ポリアミドの溶解度(室温)は、0.1質量%以下であった。
100mlの4口フラスコの中に、ポリマーAとしてポリアミド(重量平均分子量 17,000、デグザ社製 ‘TROGAMID(登録商標)’ CX7323 )1.2g、有機溶媒としてギ酸 27.6g、ポリマーBとしてポリビニルアルコール 1.2g(日本合成化学工業株式会社‘ゴーセノール(登録商標)’GM-14、SP値32.8(J/cm3)1/2)を加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、十分に攪拌した状態を継続しながら、900rpmで攪拌をしながら、貧溶媒として60gのイオン交換水を、送液ポンプを経由し、0.05g/分のスピードで滴下を開始した。徐々に滴下速度を上げながら滴下し、全量を90分かけて滴下した。10gのイオン交換水を入れた時に系が白色に変化した。半分量のイオン交換水を滴下した時点で系の温度を60℃まで昇温させ、引き続き、残りのイオン交換水を入れ、全量滴下した後に、引き続き30分間攪拌した。室温に戻した懸濁液を、ろ過し、イオン交換水50gで洗浄し、80℃ 10時間真空乾燥を行い、白色固体1.1gを得た。得られた粉体を走査型電子顕微鏡にて、観察したところ、平均粒子径 13.4μm、粒子径分布指数1.1のポリアミド微粒子であった。なお、本実施例で用いたポリアミドの融解熱量は、9.4J/gであり、このポリマーのSP値は、計算法より23.3(J/cm3)1/2だった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、体積比 1/9以下 (ポリマーA溶液相/ポリマーB溶液相(体積比))で2相分離することが分かった。貧溶媒である水に対するこのポリアミドの溶解度(室温)は、0.1質量%以下であった。
100mlの4口フラスコの中に、ポリマーAとしてポリアミド(重量平均分子量 17,000、デグザ社製 ‘TROGAMID(登録商標)’ CX7323 )1.2g、ビスフェノールA型エポキシ樹脂(“jER”(登録商標)828、ジャパンエポキシレジン(株)製)0.078g、硬化剤としてポリアミドアミン(“トーマイド”(登録商標)#296 (富士化成工業(株)製 ))0.026g、有機溶媒としてギ酸 27.6g、ポリマーBとしてポリビニルアルコール 1.2g(日本合成化学工業株式会社‘ゴーセノール(登録商標)’GM-14、SP値32.8(J/cm3)1/2)を加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、十分に攪拌した状態を継続しながら、900rpmで攪拌をしながら、貧溶媒として60gのイオン交換水を、送液ポンプを経由し、0.05g/分のスピードで滴下を開始した。徐々に滴下速度を上げながら滴下し、全量を90分かけて滴下した。10gのイオン交換水を入れた時に系が白色に変化した。半分量のイオン交換水を滴下した時点で系の温度を60℃まで昇温させ、引き続き、残りの水を入れ、全量滴下した後に、引き続き30分間攪拌した。室温に戻した懸濁液を、ろ過し、イオン交換水50gで洗浄し、80℃ 10時間真空乾燥を行い、白色固体.1.1gを得た。得られた粉体を走査型電子顕微鏡にて、観察したところ、平均粒子径 26.0μm、粒子径分布指数1.1のポリアミド微粒子であった。本粒子を赤外分光光度計にて、本粒子の定性を行ったところ、エポキシ樹脂の特性吸収ピークである828cm-1が観測された。なお、本実施例で用いたポリアミドの融解熱量は、9.4J/gであり、このポリマーのSP値は、計算法より23.3(J/cm3)1/2だった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、体積比 1/9以下 (ポリマーA溶液相/ポリマーB溶液相(体積比))で2相分離することが分かった。貧溶媒である水に対する、このポリアミド、ビスフェノールA型エポキシ樹脂の溶解度(室温)は、いずれも0.1質量%以下であった。
実施例5で得た濾液を窒素雰囲気下、80℃、20kPaの減圧条件下にて、系中に含まれる水の留去を行った。水分測定機(三菱化学株式会社製 水分測定機 CA-06)にて系内の水分が1質量%以下になるように水の留去を行った。この際の水分量は。0.85質量%であった。残液中のポリマーBであるポリビニルアルコールをゲルパーミエンデーションクロマトグラフィーで定量したところ、ポリビニルアルコールの濃度は5.6質量%であった。残った残液のうち、47.1g(内N-メチル-2-ピロリドン 44.6g、ポリビニルアルコール2.5gを含む。)を100mlのフラスコに入れ、ポリマーAとしてポリエーテルスルホン2.5g(重量平均分子量 67,000 住友化学株式会社製 ‘スミカエクセル(登録商標)’5003P)、N-メチル-2-ピロリドン0.4gを加え、80℃に加熱し、ポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌しながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由して、0.41g/分のスピード゛で滴下した。約12gのイオン交換水を加えた時点で、系が白色に変化した。得られた懸濁液を、ろ過し、イオン交換水 100gで洗浄し、濾別したものを、80℃ 10時間真空乾燥を行い、白色固体を2.2g得た。得られた粉体を走査型電子顕微鏡にて観察したところ、真球状の微粒子形状であった。平均粒子径 17.7μm、粒子径分布指数 1.08のポリエーテルスルホン微粒子であり、ほぼ実施例1とほぼ同等の平均粒子径、粒子径分布および収率を持つものが得られた。
100mlの4口フラスコの中に、ポリマーAとしてポリアミドイミド 2.5g(重量平均分子量 66,000 東レ製 TI 5013E-P)、有機溶媒としてN-メチル-2-ピロリドン 45g、ポリマーBとしてポリビニルアルコール 2.5g(日本合成化学工業株式会社 ‘ゴーセノール(登録商標)’GL-05)を加え、80℃に加熱し全てのポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌をしながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由し、0.41g/分のスピードで滴下を行った。12gのイオン交換水を加えた時点で、系が白色に変化した。全量の水を入れ終わった後に、30分間攪拌した。さらにイオン交換水50gを一括で添加し、得られた懸濁液を、遠心分離機にて、重力加速度の20000倍にて20分間、遠心分離を行い、上澄み液を取り除いた。得られた固形分を、ろ過し、イオン交換水 100gで洗浄し、80℃ 10時間真空乾燥を行い、白色固体2.2gを得た。得られた粉体を走査型電子顕微鏡にて観察したところ、真球状であり、平均粒子径 0.5μm、粒子径分布指数1.16のポリアミドイミド微粒子であった。なお、本実施例で用いたポリアミドイミドの融解熱量は観測されず、このポリマーのSP値は、計算法より、31.0(J/cm3)1/2だった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、ポリマーA溶液相とポリマーB溶液相は、2相分離することが分かった。貧溶媒である水に対するポリアミドイミドの溶解度(室温)は、0.1質量%以下であった。
100mlの4口フラスコの中に、ポリマーAとしてポリアリレート 2.5g(重量平均分子量 24,000 ユニチカ製ユーポリマーU-100)、有機溶媒としてN-メチル-2-ピロリドン 45g、ポリマーBとしてポリビニルアルコール 2.5g(日本合成化学工業株式会社 ‘ゴーセノール(登録商標)’GL-05)を加え、80℃に加熱し全てのポリマーが溶解するまで攪拌を行った。系の温度を室温に戻した後に、450rpmで攪拌をしながら、貧溶媒として50gのイオン交換水を、送液ポンプを経由し、0.41g/分のスピードで滴下を行った。12gのイオン交換水を加えた時点で、系が白色に変化した。全量の水を入れ終わった後に、30分間攪拌した。さらにイオン交換水50gを一括で添加し、得られた懸濁液を、遠心分離機にて、重力加速度の20000倍にて20分間、遠心分離を行い、上澄み液を取り除いた。得られた固形分を、ろ過し、イオン交換水 100gで洗浄し、80℃ 10時間真空乾燥を行い、白色固体2.1gを得た。得られた粉体を走査型電子顕微鏡にて観察したところ、真球状であり、平均粒子径 0.6μm、粒子径分布指数1.13のポリアリレート微粒子であった。なお、本実施例で用いたポリアリレートの融解熱量は観測されず、このポリマーのSP値は、計算法より、30.5(J/cm3)1/2であった。また、本有機溶媒とポリマーA、ポリマーBを別途溶解させ、静置観察したところ、本系では、ポリマーA溶液相とポリマーB溶液相は、2相分離することが分かった。貧溶媒である水に対するポリアリレートの溶解度(室温)は、0.1質量%以下であった。
100mlの4口フラスコの中に、ポリマーAとしてポリエーテルスルホン2.5g(重量平均分子量 67,000 住友化学株式会社製 ‘スミカエクセル(登録商標)’5003P)、有機溶媒としてN-メチル-2-ピロリドン 47.5g、ポリマーBをいれずに4時間攪拌を行った。この際、系は、均一な状態であった。この系に対し、送液ポンプを経由し、貧溶媒として50gのイオン交換水を、1g/分のスピードで滴下を行ったところ、粗大凝集物が生成したため、直ちに攪拌を止めた。粒子状のものは得られなかった。
100mlの4口フラスコの中に、ポリマーAとしてポリエーテルスルホン2.5g(重量平均分子量 67,000 住友化学株式会社製 ‘スミカエクセル(登録商標)’5003P)、有機溶媒としてN-メチル-2-ピロリドン 47g、ポリマーBとしてポリビニルアルコール 0.5g(日本合成化学工業株式会社 ‘ゴーセノール(登録商標)’GL-05)を加え、80℃に加熱し全てのポリマーが溶解するまで攪拌を行った。この際、系は、均一な状態であった。この系に対し、送液ポンプを経由し、貧溶媒として50gのイオン交換水を、0.41g/分のスピードで滴下を行った。約2gのイオン交換水を加えた時点で、系が白色に変化し、ポリマーの塊状物になった。得られた固体を洗浄し、80℃ 10時間真空乾燥を行い、白色固体を得た。得られた固体を走査型電子顕微鏡にて観察したところ、100μm以下の粒子形状のものは、塊状物であった。
100mlの4口フラスコの中に、ポリマーAとしてポリエーテルスルホン2.5g(重量平均分子量 67,000 住友化学株式会社製 ‘スミカエクセル(登録商標)’5003P)、有機溶媒としてN-メチル-2-ピロリドン 47g、ポリマーBとしてオクチルフェノキシポリエトキシエタノール (重量平均分子量11200、数平均分子量8000)2.5gを加え、80℃に加熱し全てのポリマーが溶解するまで攪拌を行った。この際、系は、均一な状態であった。この系に対し、送液ポンプを経由し、貧溶媒として50gのイオン交換水を、0.41g/分のスピードで滴下を行った。約2gのイオン交換水を加えた時点で、系が白色に変化し、ポリマーの塊状物になった。得られた固体を洗浄し、80℃ 10時間真空乾燥を行い、白色固体を得た。得られた粉体を走査型電子顕微鏡にて観察したところ、100μm以下の粒子形状のものはなく、ほとんどなかった。
特開2000-80329号公報の方法により、ポリエーテルスルホンの粒子を製造した。芳香族ポリエーテルスルホン(PES)2.0g、N-メチル-2-ピロリドン38.0gを加え溶解させた。エタノール10.0gを加え、均一な溶液になるまで撹拌した(溶液A)。攪拌機付きフラスコに10質量%のオクチルフェノキシポリエトキシエタノール(重量平均分子量1200、数平均分子量800)2.5g、純水37.5gを加え、均一になるまで撹拌した(溶液B)。溶液Aを溶液Bに各々撹拌しながら添加し、PES粒子のスラリー溶液を得た。得られたスラリー溶液を濾別し、濾物を水100gで3回洗浄した。その後、温度80℃において真空乾燥させ、PES粒子を1.0gで得た。数平均粒子径は0.3μm、体積平均粒子径は38.0μm、粒子径分布指数は、128であった。
Claims (34)
- ポリマーAとポリマーBと有機溶媒とを溶解混合したときに、ポリマーAを主成分とする溶液相と、ポリマーBを主成分とする溶液相の2相に相分離する系において、エマルジョンを形成させた後、ポリマーAの貧溶媒を接触させることにより、ポリマーAを析出させることを特徴とするポリマー微粒子の製造方法。
- ビニル系重合体、ポリカーボネート、ポリアミド、ポリフェニレンエーテル、ポリエーテルイミド、非晶ポリアリレート、ポリアミドイミド、エポキシ樹脂のうちから選ばれる少なくとも1種以上のポリマーAとポリマーBと有機溶媒とを溶解混合したときに、ポリマーAを主成分とする溶液相と、ポリマーBを主成分とする溶液相の2相に相分離する系において、エマルジョンを形成させた後、ポリマーAの貧溶媒を接触させることにより、ポリマーAを析出させることを特徴とするポリマー微粒子の製造方法。
- 2相に相分離したときの各相の溶媒が実質的に同じであることを特徴とする請求項1または2記載のポリマー微粒子の製造方法。
- ポリマーAが、合成ポリマーであることを特徴とする請求項1~3記載のポリマー微粒子の製造方法。
- ポリマーAが、非水溶性ポリマーであることを特徴とする請求項1~4のいずれか1項記載のポリマー微粒子の製造方法。
- 貧溶媒を接触させる方法が、貧溶媒をエマルジョンの中に添加することを特徴とする請求項1~5のいずれか1項記載のポリマー微粒子の製造方法。
- ポリマー微粒子の粒子径分布指数が、2以下であることを特徴とする請求項1~6のいずれか1項記載のポリマー微粒子の製造方法。
- 有機溶媒が、水溶性溶媒であることを特徴とする、請求項1~7のいずれか1項記載のポリマー微粒子の製造方法。
- ポリマーAとポリマーBの溶解度パラメーターの差が、1(J/cm3)1/2以上であることを特徴とする請求項1~8のいずれか1項記載のポリマー微粒子の製造方法。
- ポリマーBが、ポリビニルアルコール、ポリ(ビニルアルコール-エチレン)共重合体、ポリエチレングリコール、セルロース誘導体、ポリビニルピロリドン類の中から選ばれる少なくとも1種以上であることを特徴とする、請求項1~9のいずれか1項記載のポリマー微粒子の製造方法。
- ポリマー微粒子の粒径が500ミクロン以下であることを特徴とする、請求項1~10のいずれか1項記載のポリマー微粒子の製造方法。
- 有機溶媒が、N-メチル-2-ピロリドン、ジメチルスルホキシド、N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミド、1,3-ジメチル-2-イミダゾリジノン、プロピレンカーボネート、スルホラン、ギ酸、酢酸から選ばれる1種以上であることを特徴とする、請求項1~11のいずれか1項記載のポリマー微粒子の製造方法。
- ポリマーAの貧溶媒が、アルコール系溶媒、水から選ばれる1種以上であることを特徴とする請求項1~12項のいずれか1項記載のポリマー微粒子の製造方法。
- ポリマーAが、ビニル系重合体、ポリエーテルスルホン、ポリカーボネート、ポリアミド、ポリフェニレンエーテル、ポリエーテルイミド、非晶ポリアリレート、ポリアミドイミド、エポキシ樹脂の中から選ばれる少なくとも1種であることを特徴とする請求項1から13項のいずれか1項記載のポリマー微粒子の製造方法。
- ポリマーAを析出させた後に、固液分離をし、ポリマーA微粒子を除いた、ポリマーB成分を含む溶液から、貧溶媒を除去し、得られた溶液に、再度、ポリマーAを加えて、ポリマーAを主成分とする溶液相と、ポリマーBを主成分とする溶液相の2相に相分離する系を形成させ、有機溶媒およびポリマーBを再利用することを特徴とする、請求項1から14のいずれか1項記載のポリマー微粒子の製造方法。
- 前記芳香族ポリエーテルスルホンと界面活性剤を第1の溶媒中で混合し、芳香族ポリエーテルスルホンの均一溶液または懸濁液を得る工程、芳香族ポリエーテルスルホンの均一溶液または懸濁液に第1の溶媒とは異なる第2の溶媒を加えて芳香族ポリエーテルスルホン粒子を析出させる工程を含むことを特徴とする請求項16記載の芳香族ポリエーテルスルホン粒子の製造方法。
- 第1の溶媒が、非プロトン性極性溶媒または非プロトン性極性溶媒と非プロトン性極性溶媒に相溶する他の溶媒との混合溶媒であることを特徴とする請求項17記載の芳香族ポリエーテルスルホン粒子の製造方法。
- 非プロトン性極性溶媒が、N-メチル-2-ピロリドン、N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミド、1,3-ジメチル-2-イミダゾリジノン、ジメチルスルホキシド、およびスルホランから選ばれる1種または2種以上の混合溶媒であることを特徴とする請求項18記載の芳香族ポリエーテルスルホン粒子の製造方法。
- 第2の溶媒が、25℃における芳香族ポリエーテルスルホンの溶解度が1質量%以下の溶媒であることを特徴とする請求項17~19のいずれか1項記載の芳香族ポリエーテルスルホン粒子の製造方法。
- 第2の溶媒が、水、メタノール、およびエタノールから選ばれる1種または2種以上の混合物であることを特徴とする請求項17~20のいずれか1項記載の芳香族ポリエーテルスルホン粒子の製造方法。
- 界面活性剤が、完全ケン化型または部分ケン化型のポリビニルアルコール、完全ケン化型または部分ケン化型のポリ(ビニルアルコールーエチレン)共重合体、ポリエチレングリコール、およびポリビニルピロリドンから選ばれる1種または2種以上の混合物であることを特徴とする請求項16~21のいずれか1項記載の芳香族ポリエーテルスルホン粒子の製造方法。
- 界面活性剤の添加量が、芳香族ポリエーテルスルホン100質量部に対し、1~200質量部であることを特徴とする請求項16~22のいずれか1項記載の芳香族ポリエーテルスルホン粒子の製造方法。
- 粒子径分布指数が2以下であり、かつ平均粒子径が0.5μm以上であり、かつ非晶性ポリマーであることを特徴とするポリマー微粒子。
- ガラス転移点が150℃以上400℃以下であることを特徴とする請求項24記載のポリマー微粒子。
- ポリマーが、非ビニル系のポリマーであることを特徴とする請求項24または25記載のポリマー微粒子。
- 粒子径分布指数が2以下であり、かつポリエーテルスルホン、ポリカーボネート、非晶非全芳香族ポリアミド、ポリフェニレンエーテル、ポリエーテルイミド、非晶ポリアリレート、ポリアミドイミド、エポキシ樹脂の中から選ばれる少なくとも1種からなることを特徴とするポリマー微粒子。
- 粒子径分布指数が2以下であり、かつ平均粒子径が10μm超であり、かつポリマー微粒子の内部に子粒子を包含することを特徴とするポリマー微粒子。
- 子粒子の粒子径が、ポリマー微粒子の粒子径の1/3以下であることを特徴とする請求項28記載のポリマー微粒子
- ポリマーがABSで構成されることを特徴とする請求項28または29記載のポリマー微粒子。
- 粒子径分布指数が2以下であり、かつその平均粒子径が、20μm以上であり、さらにポリマーが、ビニル系重合体であることを特徴とするポリマー微粒子。
- 数平均粒子径が0.1~50μm、粒子径分布指数が1.0~1.5であることを特徴とする芳香族ポリエーテルスルホン粒子。
- ポリエーテルスルホンとポリマーBと有機溶媒とを溶解混合したときに、ポリエーテルスルホンを主成分とする溶液相と、ポリマーBを主成分とする溶液相の2相に相分離する系において、エマルジョンを形成させた後、ポリエーテルスルホンの貧溶媒を接触させることにより、ポリエーテルスルホンを析出させることを特徴とするポリマー微粒子の製造方法。
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TW201011062A (en) | 2010-03-16 |
EP2287236A4 (en) | 2013-03-13 |
ES2640732T3 (es) | 2017-11-06 |
CN104109250A (zh) | 2014-10-22 |
CN102099400A (zh) | 2011-06-15 |
JP5099135B2 (ja) | 2012-12-12 |
US9410004B2 (en) | 2016-08-09 |
US20130337263A1 (en) | 2013-12-19 |
TWI400278B (zh) | 2013-07-01 |
EP2287236A1 (en) | 2011-02-23 |
JP2013076085A (ja) | 2013-04-25 |
CN102099400B (zh) | 2014-06-25 |
US8574669B2 (en) | 2013-11-05 |
JP2012197461A (ja) | 2012-10-18 |
CN104109250B (zh) | 2017-04-12 |
JP5223989B2 (ja) | 2013-06-26 |
KR101294925B1 (ko) | 2013-08-08 |
JP2013237857A (ja) | 2013-11-28 |
JP2012197460A (ja) | 2012-10-18 |
JP5387796B2 (ja) | 2014-01-15 |
EP2287236B1 (en) | 2017-07-26 |
US10239970B2 (en) | 2019-03-26 |
AU2009250453A1 (en) | 2009-11-26 |
JP5324698B2 (ja) | 2013-10-23 |
US20160304714A1 (en) | 2016-10-20 |
KR20110029126A (ko) | 2011-03-22 |
AU2009250453B2 (en) | 2014-07-10 |
JP5338957B2 (ja) | 2013-11-13 |
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US20110070442A1 (en) | 2011-03-24 |
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