WO2015170649A1 - 樹脂複合材料および樹脂複合材料の製造方法 - Google Patents
樹脂複合材料および樹脂複合材料の製造方法 Download PDFInfo
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- WO2015170649A1 WO2015170649A1 PCT/JP2015/062858 JP2015062858W WO2015170649A1 WO 2015170649 A1 WO2015170649 A1 WO 2015170649A1 JP 2015062858 W JP2015062858 W JP 2015062858W WO 2015170649 A1 WO2015170649 A1 WO 2015170649A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/70—Preparations for dentistry comprising inorganic additives
- A61K6/71—Fillers
- A61K6/76—Fillers comprising silicon-containing compounds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/891—Compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
- C08L71/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2371/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
Definitions
- the present invention relates to a resin composite material and a method for producing the resin composite material.
- Super engineering resins are used in a wide range of applications such as the electrical / electronic field, aerospace field, automobile industry, medical field, general industrial field.
- polyaryl ether ketone resins are particularly promising because they have excellent chemical properties and physical properties.
- super engineering resin has various usefulness, there is a problem that it is easy to bend and wear.
- a method of forming a resin composite material by adding a filler to a resin is generally known.
- resin composite materials have high bending strength and high rigidity.
- a resin composite material used as a machine part, a structural material, or a dental material often requires even better mechanical properties.
- such a resin composite material tends to be brittle, and when a certain strain is applied, it causes breakage and similar phenomena (such as chipping).
- the present invention has been made in view of the above circumstances, has a toughness superior to that of conventional resin composite materials, and is a resin composite that does not break even if it is loaded with a certain strain while having rigidity. It is an object of the present invention to provide a material and a manufacturing method thereof.
- the resin composite material of the present invention comprises (A) 100 parts by volume of a polyaryl ether ketone resin having a melt viscosity of 210 to 350 [Pa ⁇ s] at a temperature of 370 ° C. and a shear rate of 1220 [1 / s]; B) 20 to 60 parts by volume of inorganic particles.
- the inorganic particles are preferably silica-based inorganic particles.
- the inorganic particles are preferably surface-treated with a silane coupling agent.
- the volume average particle diameter of (B) inorganic particles is 0.01 to 10 ⁇ m.
- resin composite material of the present invention is preferably for dental use.
- resin composite material of the present invention preferably further contains a pigment.
- Another embodiment of the resin composite material of the present invention includes: (A) a polyaryletherketone resin and (B) a raw material containing inorganic particles, a barrel having a raw material inlet, and a screw rotatably disposed in the barrel; It is preferable to prepare by melting and kneading so as to satisfy the following formula (I).
- D is the outer diameter of the screw (mm)
- R is the rotational speed of the screw (1 / s)
- X is the width (mm) of the narrowest portion in the gap between the inner peripheral surface of the barrel and the screw. Represents. ]
- the method for producing a resin composite material of the present invention comprises (A) 100 parts by volume of a polyaryletherketone resin having a melt viscosity of 210 to 350 [Pa ⁇ s] at a temperature of 370 ° C. and a shear rate of 1220 [1 / s], and ( B) A raw material containing 20 to 60 parts by volume of inorganic particles is charged from a raw material charging port of a melt-kneading apparatus having a barrel having a raw material charging port and a screw rotatably disposed in the barrel, and the following formula
- the resin composite material is manufactured through at least a melt-kneading step of melt-kneading so as to satisfy (I).
- the resin composite material of the present embodiment includes (A) 100 parts by volume of a polyaryl ether ketone resin having a melt viscosity of 210 to 350 [Pa ⁇ s] at a temperature of 370 ° C. and a shear rate of 1220 [1 / s], (B ) 20 to 60 parts by volume of inorganic particles.
- A 100 parts by volume of a polyaryl ether ketone resin having a melt viscosity of 210 to 350 [Pa ⁇ s] at a temperature of 370 ° C. and a shear rate of 1220 [1 / s]
- B 20 to 60 parts by volume of inorganic particles.
- (A) Polyaryletherketone resin In the resin composite material of this embodiment, at least a polyaryletherketone resin is used as the resin material constituting the resin matrix.
- a resin material constituting the resin matrix only a polyaryl ether ketone resin may be used, but other resins may be used in combination with the polyaryl ether ketone resin as necessary.
- the main component of the resin material constituting the resin matrix is polyaryl ether ketone from the viewpoint of ensuring the mechanical strength of the resin composite material. It must be a resin.
- the “main component” means that the proportion of the polyaryl ether ketone resin in 100 parts by mass of the resin material constituting the resin matrix is 70 parts by mass or more. In addition, it is preferable that the ratio of the polyaryl ether ketone resin which occupies for 100 mass parts of resin materials which comprise a resin matrix is 95 mass parts or more.
- other resins that can be used in combination with the polyaryl ether ketone resin are not particularly limited as long as they do not significantly deteriorate the rigidity and toughness, but the mechanical strength, color tone, chemical durability, etc. of the resin composite material are not limited. From the viewpoint of easy securing, for example, polyarylate resin, polycarbonate resin, polyethylene terephthalate resin, polyphthalamide resin, polytetrafluoroethylene resin, and polyphenylene ether resin are preferably used.
- a polyaryl ether ketone resin is used as the main resin material constituting the resin matrix. For this reason, the mechanical strength superior to the conventional resin composite material can be obtained easily.
- the polyaryl ether ketone resin is a thermoplastic resin containing at least an aromatic group, an ether group (ether bond) and a ketone group (ketone bond) as a structural unit.
- a benzene ring (phenylene group) is an ether group.
- a linear polymer structure bonded via a ketone group.
- Representative examples of the polyaryl ether ketone resin include polyether ketone (PEK), polyether ether ketone (PEEK), polyether ketone ketone (PEKK), polyether ketone ether ketone ketone (PEKEKK) and the like.
- the aromatic group constituting the structural unit of the polyaryl ether ketone resin may have a structure having two or more benzene rings such as a biphenyl structure.
- the structural unit of the polyaryl ether ketone resin may contain a sulfonyl group or another monomer unit that can be copolymerized.
- an ether group and a ketone group constituting a main chain are repeating units in which ether, ether, and ketone are arranged in this order. It is preferable to use a polyetheretherketone bottle having polyetheretherketone.
- Polyether ether ketones having this repeating unit are commercially available under the trade name “PEEK” and the like. Specifically, there are VESTAKEEEP (registered trademark, Daicel Evonik Co., Ltd.), VICTREX PEEK (registered trademark, VICTREX Co., Ltd.) and the like. Can be mentioned.
- the (A) polyaryletherketone resin used in the resin composite material of this embodiment is characterized in that the melt viscosity at a temperature of 370 ° C. and a shear rate of 1220 [1 / s] is 210 to 350 [Pa ⁇ s].
- the melt viscosity in the present invention is a capillary rheometer with a heating mechanism of at least 400 ° C. having a length of 10.0 mm and a diameter of ⁇ 1.0 mm, a test temperature of 370 ° C., and a shear rate of 1220 [1 / s].
- the test speed of the piston is adjusted so that the measured viscosity value [Pa ⁇ s] is meant. About conditions other than these, it measures based on JISK7199: 1999.
- the melt viscosity of the resin can be measured under various measurement conditions (temperature and shear rate) as long as the resin is in a temperature range where the resin is in a molten state, and the value of the melt viscosity varies depending on the measurement conditions.
- the resin composite material is produced through a process of melting and kneading a raw material containing (A) polyaryletherketone resin and (B) inorganic particles in a molten state.
- the present inventors consider that the mechanical properties of the resin composite material are strongly influenced by the melted state of the (A) polyaryletherketone resin at the time of melt-kneading. A temperature of 370 ° C.
- a temperature of 370 ° C. which is a measurement condition of melt viscosity
- a melting point of a general polyaryl ether ketone resin of about 340 ° C. which is several tens of degrees higher than that, and is suitable for kneading with polyaryl ether ketone resins.
- the temperature is set so that sufficient fluidity can be generated.
- the shear rate which is a measurement condition, has a correlation with the shear force applied to the raw material during melt-kneading.
- the shear rate is too small, uniform dispersion of inorganic particles in the resin matrix becomes difficult, but the shear rate is reduced. Even if it is increased, it is considered that the dispersibility improvement effect tends to be gradually saturated. Therefore, in order to reliably and stably obtain a resin composite material having excellent mechanical properties, the shear rate at the point when the effect of improving dispersibility gradually saturates when the shear rate is increased is important. . Therefore, from this viewpoint, 1220 [1 / s] is set as the shear rate.
- a resin having a low melt viscosity and high fluidity that is, a melt viscosity of A low resin is selected.
- the present invention is characterized by selecting and using a polyaryletherketone resin having a specific melt viscosity in order to obtain high toughness. Melt viscosity depends on temperature and shear rate. Generally, the higher the temperature and the higher the shear rate, the smaller the melt viscosity.
- melt viscosity when the melt viscosity is greater than 350 [Pa ⁇ s], the viscosity increases when inorganic particles are blended with the polyaryletherketone resin, so the resin composite material is adjusted by overloading the kneading apparatus. It is difficult. Further, shear heat is generated as the viscosity increases due to the addition of inorganic particles during kneading, and the thermal degradation of the resin component occurs, so that the toughness decreases. Furthermore, when molding is performed by injection molding, press molding, or the like, the toughness decreases because the frequency of molding defects increases due to high melt viscosity. A more preferable range of the melt viscosity is 220 to 300 Pa ⁇ s, and a most preferable range is 230 to 280 Pa ⁇ s.
- VESTAKEEEP ZV7401 224 Pa ⁇ s
- VESTAKEEEP 2000G 238 Pa ⁇ s
- PEEK OPTIMA-LT2 330 Pa.s
- VESTAKEEP M2G 238 Pa.s
- the polyaryl ether ketone resin to be used can be used individually by 1 type or in combination of 2 or more types.
- the resin composite material of the present embodiment is formed by blending inorganic particles at a ratio of 20 to 60 parts by volume with respect to 100 parts by volume of the polyaryl ether ketone resin. These inorganic particles are contained in a dispersed state in the polyaryl ether ketone resin matrix constituting the resin composite material of the present embodiment.
- the resin composite material contains inorganic particles, high rigidity can be obtained.
- the blending ratio is less than 20 parts by volume, high rigidity cannot be obtained.
- the blending ratio is greater than 60 parts by volume, the resin composite material tends to be brittle and toughness tends to decrease.
- a more preferable range of the blending ratio is 30 to 50 parts by volume.
- the true density of the inorganic particles is previously determined with a hydrometer or the like, and the mass to be the required volume part is measured with a scale and blended with the polyaryletherketone resin.
- the relationship between the bulk density or tap density of the inorganic particles and the true density is obtained in advance with a powder physical property measuring machine, a specific gravity meter, etc., so that the required volume part is obtained from the inorganic particles filled in the container. You may mix
- the shape and internal structure of the inorganic particles are not particularly limited, and may have any shape and internal structure, but it is preferable not to use inorganic particles having a tube shape or a hollow structure.
- inorganic particles having a tube shape or a hollow structure.
- a preferable shape of an inorganic particle spherical shape, an indefinite shape, a whisker shape etc. are mentioned,
- a preferable internal structure a solid structure is mentioned.
- the material (component) of the inorganic particles is not particularly limited. Specifically, for example, silica glass, borosilicate glass, soda glass, aluminosilicate glass, and fluoroaluminosilicate glass, heavy metals (for example, barium, strontium) , Zirconium); glass ceramics such as crystallized glass in which crystals are precipitated on the glass, crystallized glass in which crystals such as diopside and leucite are precipitated; silica-zirconia, silica-titania, silica -Composite inorganic oxides such as silica-based inorganic particles such as alumina; or oxides obtained by adding group I metal oxides to these composite inorganic oxides; metal inorganic oxides such as silica, alumina, titania, zirconia; Can be used.
- the material of the inorganic particles is silica, zirconia, less harmful to the living body, good color tone, and good dispersibility. It is preferably selected from at least one of alumina and titania.
- the inorganic particles are preferably silica-based inorganic particles from the viewpoint of easily improving the rigidity and toughness of the resin composite material.
- the silica-based inorganic particles refer to silica particles and particles (silica-based composite oxide particles) made of a composite oxide of silica and other metal oxides.
- silica is preferably contained in an amount of 30 mol% or more, more preferably 30 to 98 mol%, and particularly preferably 50 to 92 mol%.
- the other metal oxide is preferably contained in an amount of 70 mol% or less, more preferably 70 to 2 mol%, and particularly preferably 50 to 8 mol%).
- the content of other metal oxides in the silica-based composite oxide particles depends on the purpose, such as X-ray transparency / opacity of resin composite materials, optical properties such as fluorescence, catalytic properties, ion elution properties, etc. It is good to adopt considering this.
- the metal oxide compounded with silica include B 2 O 3 , TiO 2 , SrO, BaO, ZrO 2 , HfO 2 , La 2 O 3 , Y 2 O 3 , ZnO, Yb 2 O 3 , and Sb 2. O 3 etc. are mentioned.
- titania-based inorganic particles refer to titania particles and particles (titania-based complex oxide particles) made of a complex oxide of titania and other metal oxides.
- the specific contents of the titania-based composite oxide particles are the same except that silica is replaced with titania in the description of the silica-based composite oxide particles described above (however, as a metal oxide to be compounded, Except when TiO 2 is used).
- the blending amount (parts by mass) of the inorganic particles with respect to 100 parts by mass of the polyaryl ether ketone resin is within the range of 20 to 60 parts by volume of inorganic particles with respect to 100 parts by volume of the polyaryl ether ketone resin. If it is the range which becomes, it can select suitably. In this case, the blending amount (parts by mass) of the inorganic particles with respect to 100 parts by mass of the polyaryl ether ketone resin varies depending on the specific gravity of the blended inorganic particles.
- the specific gravity of a general polyaryl ether ketone resin is about 1.3 g / cc, and the specific gravity of general silica is about 2 Since the amount is 2 g / cc, the amount of silica particles (or silica-based inorganic particles) is preferably 34 to 101 parts by weight, more preferably 51 to 85 parts by weight, based on 100 parts by weight of the polyaryl ether ketone resin.
- the inorganic particles are titania particles or titania-based inorganic particles having substantially the same specific gravity as titania particles
- the specific gravity of a general polyaryletherketone resin is about 1.3 g / cc
- the specific gravity of a general titania Is about 4.0 g / cc
- the blending amount of titania particles (or titania-based inorganic particles) with respect to 100 parts by mass of the polyaryl ether ketone resin is preferably 62 to 184 parts by mass, more preferably 92 to 154 parts by mass. preferable.
- the surface of the inorganic particles is preferably surface-treated with a surface treatment agent.
- this surface treatment is performed in order to improve the dispersibility of the inorganic particles in the polyaryl ether ketone resin, and the surface of the inorganic particles is modified by this surface treatment.
- a surface treatment method is not particularly limited, and a known surface treatment method can be appropriately used.
- a typical surface treatment method a surface treatment method using a silane coupling agent, a zirconate coupling agent, an aluminate coupling agent, or a titanate coupling agent as a surface treatment agent (hydrophobizing agent). Can be mentioned.
- Suitable examples of the silane coupling agent include the following general formula (II).
- R 1 -SiR 2 mBn (II) [In the general formula (II), R 1 is an organic group having 2 to 30 atoms constituting a straight-chain part having an ethylenically unsaturated group, a methyl group, or an aromatic group at the terminal; 2 is a hydrocarbon group having 1 to 6 carbon atoms, and B is an alkoxy group, a halogen group or an isocyanate group having a hydrocarbon having 1 to 6 carbon atoms.
- m and n are integers, the sum of m and n is 3, and m is an integer in the range of 0-2.
- the ethylenically unsaturated group may be polymerized and thickened during kneading to cause discoloration due to local heat. Therefore, the terminal group is preferably a methyl group or an aromatic group.
- the aromatic group is preferable because it has good affinity with the (A) polyaryl ether ketone resin, improves kneadability, and is highly effective in preventing discoloration due to the local heat.
- the number of aromatic rings constituting the aromatic group is preferably one.
- the number of atoms constituting the straight chain portion of R 1 is preferably in the range of 8-20.
- ethylenically unsaturated groups include i) unsaturated aliphatic groups including vinyl groups, (meth) acrylic groups, (meth) acrylamide groups, and ii) phenyl groups, phenoxy groups, phenylamino groups, and benzophenones.
- Aromatic groups including vinyl groups, (meth) acrylic groups, and (meth) acrylamide groups as substituents of aromatic groups such as groups, hydroxybenzophenone groups, biphenyl groups, and naphthyl groups.
- Examples of the aromatic group that is the terminal group of R 1 include a monocyclic hydrocarbon group having one aromatic ring such as a phenyl group, a phenoxy group, a phenylamino group, a benzophenone group, and a hydroxybenzophenone group, a biphenyl group, and the like.
- Non-condensed polycyclic hydrocarbon groups having 2 aromatic rings, and condensed polycyclic hydrocarbon groups having 2 aromatic rings such as naphthyl groups.
- the non-condensed polycyclic hydrocarbon group means a group in which a carbon atom constituting one aromatic ring and a carbon atom constituting the other aromatic ring form a direct bond.
- these aromatic groups do not include a substituent having a polymerizable carbon-carbon double bond such as a vinyl group, a (meth) acryl group, or a (meth) acrylamide group.
- a typical example of the organic group having 2 to 20 atoms constituting the straight chain portion in R 1 is a linear alkylene group having 2 to 20 carbon atoms.
- carbon number which comprises the linear part in said R ⁇ 1 > includes carbon number of the ethylenically unsaturated group, methyl group, or aromatic group shown as said terminal.
- examples of the hydrocarbon group having 1 to 6 carbon atoms of R 2 include hydrocarbon groups such as a methyl group, an ethyl group, and a propyl group.
- examples of the alkoxy group having a hydrocarbon having 1 to 6 carbon atoms include a methoxy group and an ethoxy group, and examples of the halogen group include a chloro group and a bromo group.
- silane coupling agents examples include 11-methacryloyloxyundecyltrimethoxysilane, 11-methacryloyloxyundecylmethyldimethoxysilane, 10-methacryloyloxydecyltrimethoxysilane, 10-methacryloyloxydecylmethyldimethoxy.
- Silane 10-methacryloyloxydecyltrichlorosilane, 8-methacryloyloxyoctyltrimethoxysilane, 8-methacryloyloxyoctylmethyldimethoxysilane, 8-methacryloyloxyoxyldimethylmethoxysilane, 8-methacryloyloxyoctyltrichlorosilane, 6-methacryloyloxy Hexylmethyldimethoxysilane, 4-methacryloyloxybutyltrimethoxysilane, ⁇ -methacryloyloxypropyltri Toxisilane, ⁇ -methacryloyloxypropylmethyldimethoxysilane, ⁇ -methacryloyloxypropyldimethylmethoxysilane, ⁇ -methacryloyloxypropyltrichlorosilane, ⁇ -methacryloyloxypropyltriisocyana
- the affinity between the inorganic particles and the resin component such as polyaryl ether ketone resin constituting the resin matrix is improved. Therefore, the dispersibility of the inorganic particles in the resin component is improved, the stress can be more effectively dispersed, and the toughness can be easily increased by promoting the crystallization of the polyaryletherketone resin. Become.
- the surface treatment agent can be used alone or in combination of two or more. Further, the amount of the surface treatment agent used for the surface treatment of the inorganic particles is not particularly limited, but from the viewpoint of operability and physical properties of the inorganic particles, 1 to 10 parts by mass per 100 parts by mass of the inorganic particles to be surface-treated. It is preferable to be in the range.
- the volume average particle diameter of the inorganic particles is not particularly limited, but the volume average particle diameter is preferably in the range of 0.01 ⁇ m to 10 ⁇ m.
- the volume average particle size is smaller than 0.01 ⁇ m, it is difficult to crush the aggregation between the particles, and the viscosity increases easily when blended in the resin, so the amount of inorganic particles is increased. It tends to be difficult.
- the volume average particle size is larger than 10 ⁇ m, the absolute number of inorganic particles in the resin matrix decreases, and it tends to be difficult to express high toughness.
- a more preferable range of the volume average particle size is 0.07 to 5 ⁇ m, and a further preferable range of the volume average particle size is 0.1 to 1.0 ⁇ m.
- the volume average particle diameter can be measured using a laser scattering method (using LS230 manufactured by Beckman Coulter, Inc., and ethanol as a dispersion medium).
- a laser scattering method using LS230 manufactured by Beckman Coulter, Inc., and ethanol as a dispersion medium.
- 0.01 to 1 g of a measurement sample is added to 5 ml of ethanol as a dispersion medium.
- the liquid in which the sample is suspended is subjected to dispersion treatment with an ultrasonic disperser for about 1 to 5 minutes, and the particle size distribution of particles having a particle size in the range of 0.04 to 2000 ⁇ m is measured.
- a cumulative distribution is drawn from the small diameter side with respect to the volume, and the particle size that becomes 50% cumulative is the volume average particle size (D50). ).
- the application of this embodiment is not particularly limited, and can be used as a machine part or a structural material.
- the resin composite material of this embodiment is suitable for dentures, artificial teeth, denture bases, dental implants (fixtures, abutments, superstructures), crown restoration materials, abutment building materials, etc.
- it is particularly suitable for use as a dental implant or a crown restoration material because of its high rigidity and resistance to fracture or chipping.
- Suitable shapes when the resin composite material of this embodiment is used for dental applications include dentures, artificial teeth, denture bases, dental implants (fixtures, abutments, superstructures), and crown restoration materials (crowns, bridges) ),
- the shape of a final product such as an abutment construction material, or the shape of a semi-finished product such as a block shape or a disk shape that can be easily processed into a final product at a dental clinic or a dental laboratory.
- the general size of such a dental resin composite material is 5 to 120 mm on a side, and is appropriately selected depending on the use of dental restoration.
- the resin composite material of this embodiment when used as a dental material, it is preferable that a pigment is added to the resin composite material as another component for the purpose of improving aesthetics.
- a pigment For the purpose of reproducing the color tone of gingiva, such as dentures and denture bases, it is preferable to use red pigments, and the color tone of teeth such as artificial teeth, abutments, superstructures, crown restoration materials, and abutment construction materials are reproduced.
- red and yellow pigments for the purpose of forming the color tone of the tooth base.
- white pigments, blue pigments and the like are appropriately selected and used as necessary.
- the resin composite material of this embodiment is manufactured through a melt-kneading step in which (B) inorganic particles are blended in (A) polyaryletherketone resin that has been heated and melted and melt-kneaded.
- the heating and melting temperature is selected from a temperature equal to or higher than the melting point of the (A) polyaryl ether ketone resin, and is preferably selected from a range of 350 to 450 ° C.
- the apparatus used in the melt-kneading step is not particularly limited as long as it is a known melt-kneading apparatus.
- a mixer with a heating device a single-axis melt-kneading apparatus, a biaxial melt-kneading apparatus, a kneader, or the like can be used.
- Equipment used in the melt-kneading process such as a single-screw melt-kneader (single-screw extruder) or a twin-screw melt-kneader (double-screw extruder), rotates in a barrel with a raw material inlet.
- melt-kneading apparatus extrusion molding apparatus
- a biaxial extrusion molding apparatus among various extrusion molding apparatuses.
- the melt-kneading step is performed by charging a raw material containing a polyaryletherketone resin and inorganic particles from a raw material charging port and melt-kneading.
- the melt-kneading process is performed so as to satisfy the conditions shown in the following mathematical formula (I).
- ⁇ is the circumference
- D is the outer diameter (mm) of the screw
- R is the rotational speed of the screw (1 / s)
- X is the inner peripheral surface of the barrel and the screw. It represents the width (mm) of the narrowest portion in the gap.
- the outer diameter D (mm) more precisely means a value twice the maximum radius in a cross section perpendicular to the axial direction of the screw.
- the outer diameter D in the formula (I) means the outer diameter of the screw in the width X of the narrowest portion.
- the extrusion molding apparatus generally has a raw material charging port called a hopper on the outer peripheral surface on one end side of a cylindrical barrel, a die is provided on the other end side, and a heater is provided on the outer peripheral side of the barrel. A heating member such as is arranged. Further, one end side of the screw disposed in the barrel (the end side on the side where the hopper of the barrel is provided) is connected to a driving device such as a motor via a gear or the like. In the melt-kneading process using the twin-screw extrusion molding apparatus, the raw material charged from the hopper is melted in the barrel and is kneaded between the barrel inner peripheral surface and the surface of the rotating screw. Move from hopper side to die side. At this time, the largest shearing force is applied to the melt-kneaded material at the narrowest portion where the gap between the inner peripheral surface of the barrel and the screw is the smallest.
- FIGS. 1 and 2 are schematic cross-sectional views showing an example of the cross-sectional structure of the kneader for explaining the formula (I), and specifically, the gap between the inner peripheral surface of the barrel and the screw is the smallest.
- An example of a cross-sectional structure when the extrusion molding apparatus is cut along a plane orthogonal to the axial direction of the screw at the narrowest portion is shown.
- a screw 2 is disposed in a cylindrical barrel 1.
- the outer diameter D of the screw 2 corresponds to a value twice the maximum radius r which is the distance between the central axis C of the screw 2 and the outermost end of the screw 2.
- the width X of the most narrowed portion corresponds to the shortest distance between the outermost end of the screw 2 and the inner peripheral surface of the barrel 1.
- the cross-sectional shape of the screw 2 is not limited to the cross shape illustrated in FIG. 1 or the substantially elliptical shape illustrated in FIG. 2, and the cross-sectional shape of a known screw can be appropriately selected. it can.
- the extrusion molding apparatus since the extrusion molding apparatus has one screw 2 if the extrusion molding apparatus is a single-shaft type, the value S exists only for this one screw 2. On the other hand, if the extrusion molding apparatus is a biaxial type, since the extrusion molding apparatus has two screws 2, the value S exists for each screw 2.
- the value S satisfies the formula (I) for each screw 2.
- the value S is 500 or more, it becomes easy to give sufficient shearing force to the raw material containing (A) polyaryletherketone resin and (B) inorganic particles, so that a resin composite material with higher toughness can be obtained. Becomes easier.
- a more preferable range of the value S is 1000 to 10,000, and a most preferable range is 1500 to 7000. When the value S exceeds 10,000, it may be difficult to adjust the resin composite material due to an overload on the kneading apparatus.
- the value S is in the range of 1500 to 7000, the lower limit is more preferably 1530 or more, further preferably 2000 or more, most preferably 2500 or more, and the upper limit is more preferably 6000 or less. More preferably, it is 5500 or less.
- a high-temperature melt-kneaded product immediately after the melt-kneading step can be directly molded into a predetermined shape by injection molding or extrusion molding.
- the melt-kneaded material in a high-temperature state immediately after the melt-kneading step is once formed into a secondary processing member such as a pellet, powder, or block, the secondary processing member is further used.
- Various processes such as injection molding, extrusion molding, laser forming, cutting, cutting, and polishing may be performed.
- a molded body having a predetermined shape is usually obtained by various molding methods such as injection molding, extrusion molding, and compression molding.
- the productivity of the molded body can be increased by rapidly cooling the mold.
- residual stress may be generated inside the compact due to rapid cooling.
- the crystal structure of the polyaryl ether ketone resin which is a thermoplastic crystalline resin, may not be ideally formed.
- heat treatment may be performed on a molded body obtained as necessary. By performing the heat treatment, the residual stress inside the molded body can be released. Further, the recrystallization of the polyaryletherketone resin vitrified by rapid cooling can be promoted by heat treatment, and as a result, the mechanical strength of the molded product can be increased.
- the heat treatment method is not particularly limited, but the temperature is preferably selected from a temperature range not lower than the glass transition point and not exceeding the melt viscosity, and is preferably selected from the range of 150 to 300 ° C.
- the heat treatment time is preferably selected from 30 minutes to 6 hours.
- the heat source is turned off in a heating apparatus such as an oven that has been subjected to the heat treatment, and the temperature is returned to room temperature over 1 hour or more.
- a molding method such as injection molding, extrusion molding, compression molding, etc.
- the bending strength of the resin composite material of the present embodiment is preferably 190 MPa or more, more preferably 200 MPa or more, and most preferably 220 MPa or more.
- the upper limit of bending strength is not specifically limited, From a practical viewpoint, it is preferable that it is 500 Mpa or less.
- the rigidity of the resin composite material of the present embodiment is preferably 5.5 GPa or more, more preferably 6.0 GPa or more, and most preferably 6.5 GPa or more in terms of flexural modulus.
- the upper limit of a bending elastic modulus is not specifically limited, From a practical viewpoint, it is preferable that it is 30 GPa or less.
- the fracture resistance evaluated by the following method is preferably 40% or more, more preferably 60% or more, further preferably 80% or more, 100 % Is most preferred.
- a test piece having a length of 2 mm, a width of 2 mm, and a length of 25 mm was prepared, and a three-point bending test was performed with a universal testing machine at a distance between supporting points of 20 mm and a crosshead speed of 1 mm / min. A total of 10 test pieces were tested, and the rate at which breakage did not occur when strain of 3 mm stroke was applied was expressed as breakage resistance [%].
- F1 Silica (spherical, volume average particle size 1.0 ⁇ m)
- F2 Silica (spherical, volume average particle size 3.8 ⁇ m)
- F3 Silica (spherical, volume average particle size 0.07 ⁇ m)
- F4 Titania (irregular shape, volume average particle size 0.3 ⁇ m)
- Melt viscosity Capillograph 1D (manufactured by Toyo Seiki Seisakusho), which is a capillary rheometer with a heating mechanism of at least 400 degrees and a length of 10.0 mm and a diameter of 1.0 mm, has a test temperature of 370 degrees and a shear rate of 1220 [1 / s. The test speed of the piston was adjusted so that the following formula was obtained, and the melt viscosity [Pa ⁇ s] was measured.
- the flexural modulus was calculated based on the tangential method (JIS K7074) from the gradient of the bending load-deflection curve from a stress of 5 N to 10 N for a test piece of 2 mm long ⁇ 2 mm wide ⁇ 25 mm long.
- Example 1 (A) 100 parts by volume of polyaryletherketone resin P1 and (B) 39 parts by volume of inorganic particles F1 were weighed, and this was measured using a biaxial extrusion molding apparatus (screw outer diameter D: 14.40 mm, width of the narrowest part) X: 0.15 mm, temperature at the time of measuring the outer diameter D and the width X was 25 ° C.). After melt-kneading under the conditions of test temperature: 370 ° C. and screw rotation speed R: 16.67 s ⁇ 1 (1000 rpm), the melt-kneaded material was recovered and used to form a plate (longitudinal) using a hot press molding machine. 40 mm ⁇ width 40 ⁇ thickness 2 mm) was subjected to pressure press molding and then slowly cooled to obtain a resin composite material. The raw material composition and evaluation results of the obtained resin composite material are shown in Table 1.
- Examples 2 to 15 A resin composite material was obtained by the same method as in Example 1 except that the types and blending amounts of (A) polyaryl ether ketone resin and (B) inorganic particles used and the test conditions were changed to the conditions shown in Table 1. It was. The raw material composition and evaluation results of the obtained resin composite material are shown in Table 1. In Table 1, for Examples 11 to 14 in which the value of ( ⁇ ⁇ D ⁇ R) / X is different from that of Example 1, in the biaxial extrusion molding apparatus used in Example 1, the screw The value of ( ⁇ ⁇ D ⁇ R) / X was adjusted by changing the rotation speed R.
- Example 16 to 18 About the used biaxial extrusion molding apparatus, the outer diameter D of the screw was changed to 10.64 mm, and the width X of the narrowest portion was changed to 0.18 mm (the temperature at the time of measuring the outer diameter D and the width X was 25 ° C.), The same method as in Example 1 except that the screw rotation speed R was changed to 8.33 s ⁇ 1 (500 rpm) for Examples 16 and 18 and changed to 5.00 s ⁇ 1 (300 rpm) for Example 17. Thus, a resin composite material was obtained. The raw material composition and evaluation results of the obtained resin composite material are shown in Table 1. In Table 1, the values shown in parentheses in the column “(A) Polyaryletherketone resin” in Example 18 are based on the mass ratio when the total amount of the resin is 100 mass% (mass%). It is.
- Example 1 A resin composite material was obtained in the same manner as in Example 1 except that the polyaryl ether ketone resin P5 was used as a raw material.
- the raw material composition and evaluation results of the obtained resin composite material are shown in Table 1. As a result of the bending test, all the test pieces were broken and the toughness was low.
- ⁇ Comparative example 4> A resin composite material was obtained by the same method as in Example 1 except that the blending amount of the inorganic particles was changed to 15 parts by volume. The raw material composition and evaluation results of the obtained resin composite material are shown in Table 1. As a result of the bending test, the elastic modulus was low and the rigidity was poor.
- Example 5 A resin composite material was obtained by the same method as in Example 1 except that the blending amount of the inorganic particles was changed to 89 parts by volume. The raw material composition and evaluation results of the obtained resin composite material are shown in Table 1. As a result of the bending test, all the test pieces were broken and the toughness was low.
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Abstract
Description
500≦(π×D×R)/X 数式(I)
〔数式(I)中、Dはスクリューの外径(mm)、Rはスクリューの回転数(1/s)、Xはバレルの内周面とスクリューとの隙間における最狭窄部の幅(mm)を表す。〕
500≦(π×D×R)/X 数式(I)
〔数式(I)中、Dはスクリューの外径(mm)、Rはスクリューの回転数(1/s)、Xはバレルの内周面とスクリューとの隙間における最狭窄部の幅(mm)を表す。〕
本実施形態の樹脂複合材料は、(A)温度370℃、せん断速度1220[1/s]における溶融粘度が210~350[Pa・s]であるポリアリールエーテルケトン樹脂100体積部と、(B)無機粒子20~60体積部とを含むことを特徴とする。以下に、本実施形態の樹脂複合材料を構成する材料等の詳細について説明する。
本実施形態の樹脂複合材料では、樹脂マトリックスを構成する樹脂材料として、少なくともポリアリールエーテルケトン樹脂が用いられる。ここで、樹脂マトリックスを構成する樹脂材料としては、ポリアリールエーテルケトン樹脂のみを用いてもよいが、ポリアリールエーテルケトン樹脂の他に、必要に応じてその他の樹脂を併用することもできる。但し、ポリアリールエーテルケトン樹脂と、その他の樹脂とをブレンドして用いる場合でも、樹脂複合材料の機械的強度を確保する観点から、樹脂マトリックスを構成する樹脂材料の主成分は、ポリアリールエーテルケトン樹脂であることが必要である。ここで、「主成分」とは、樹脂マトリックスを構成する樹脂材料100質量部中に占めるポリアリールエーテルケトン樹脂の割合が、70質量部以上であることを意味する。なお、樹脂マトリックスを構成する樹脂材料100質量部中に占めるポリアリールエーテルケトン樹脂の割合は、95質量部以上であることが好ましい。また、ポリアリールエーテルケトン樹脂と併用可能なその他の樹脂としては剛性および強靭性を大幅に劣化させるもので無い限り特に制限されないが、樹脂複合材料の機械的強度、色調、化学的耐久性等の確保が容易である観点からは、たとえば、ポリアリレート樹脂、ポリカーボネート樹脂、ポリエチレンテレフタレート樹脂、ポリフタルアミド樹脂、ポリテトラフルオロエチレン樹脂、ポリフェニレンエーテル樹脂を用いることが好適である。
本実施形態の樹脂複合材料は、ポリアリールエーテルケトン樹脂100体積部に対して、20体積部~60体積部の割合で無機粒子を配合してなる。この無機粒子は、本実施形態の樹脂複合材料を構成するポリアリールエーテルケトン樹脂マトリックス中に分散した状態で含有される。樹脂複合材料が無機粒子を含むことによって、高い剛性を得ることができる。配合割合が20体積部よりも少ない量の場合、高い剛性を得る事が出来ない。配合割合が60体積部よりも多い量の場合、樹脂複合材料に脆さが発現し強靭性が低下する傾向にある。配合割合のより好ましい範囲は、30体積部~50体積部の範囲である。無機粒子の体積量の調整方法としては、あらかじめ無機粒子の真密度を比重計などで求めておき、必要な体積部となるような質量を秤にて計測してポリアリールエーテルケトン樹脂に配合してもよいし、無機粒子の嵩密度やタップ密度と真密度との関係を粉体物性測定機や比重計などで予め求めておき、容器などに充填した無機粒子から必要な体積部となるような条件にて混練機に供給することでポリアリールエーテルケトン樹脂に配合してもよい。無機粒子の形状・内部構造は特に限定されず如何様な形状および内部構造を有していてもよいが、チューブ状や中空構造を有する無機粒子は用いないことが好ましい。なお、無機粒子の好ましい形状としては、球状、不定形状、ウィスカー状等が挙げられ、好ましい内部構造としては中実構造が挙げられる。
〔一般式(II)中、R1は、末端に、エチレン性不飽和基、メチル基、または芳香族基を有する、直鎖部分を構成する原子数が2~30の有機基であり、R2は炭素数1~6の炭化水素基であり、Bは炭素数1~6の炭化水素を有するアルコキシ基、ハロゲン基、あるいはイソシアナート基である。ここで、m、nは整数であり、mとnとの和は3であり、mは0~2の範囲の整数である。
なお、本実施形態の樹脂複合材料には、本実施形態の樹脂複合材料の使用目的に応じてその他の成分を適宜添加することができ、たとえば、帯電防止剤、紫外線吸収剤、X線像影剤、顔料等を添加することができる。
本実施形態の用途は特に制限されず、機械部品や構造材として使用することができる。本実施形態の樹脂複合材料を歯科材料として使用する場合は、義歯、人工歯、義歯床、歯科用インプラント(フィクスチャー、アバットメント、上部構造)、歯冠修復材料、支台築造材料などに好適に使用することができるが、剛性が高く破折やチッピングを起こしにくいという特性から、特に歯科用インプラントや歯冠修復材料として使用することが好適である。本実施形態の樹脂複合材料が歯科用途に用いられる場合の好適な形状は、義歯、人工歯、義歯床、歯科用インプラント(フィクスチャー、アバットメント、上部構造)、歯冠修復材料(クラウン、ブリッジ)、支台築造材料などの最終製品の形状でもよいし、歯科医院や歯科技工所などで最終製品に加工することが容易なブロック状、ディスク状等の半製品の形状でもよい。このような歯科用の樹脂複合材料の一般的な大きさは、一辺が5~120mmであり、歯科修復の用途によって適宜選択される。
本実施形態の樹脂複合材料は、加熱溶融した(A)ポリアリールエーテルケトン樹脂に(B)無機粒子を配合し、溶融混練する溶融混練工程を経て製造される。加熱溶融温度は、(A)ポリアリールエーテルケトン樹脂の融点以上の温度から選択され、350~450℃の範囲から選択されるのが好ましい。溶融混練工程において用いる装置としては、公知の溶融混練装置であれば特に限定されず、たとえば、加熱装置付きミキサー、単軸溶融混練装置や、二軸溶融混練装置、ニーダーなどを用いることができる。溶融混練工程において用いる装置としては単軸溶融混練装置(単軸押出成形装置)や、二軸溶融混練装置(二軸押出成形装置)などのように、原料投入口を有するバレルとバレル内に回転可能に配置されたスクリューとを備えた溶融混練装置(押出成形装置)を用いることが好ましく、各種の押出成形装置の中でも特に二軸押出成形装置を用いることがより好ましい。この押出成形装置を用いる場合、溶融混練工程は、ポリアリールエーテルケトン樹脂および無機粒子を含む原料を原料投入口から投入して溶融混練することで実施される。なお、使用する押出成形装置の仕様、スクリュー形状や運転条件は目的に応じて任意に選択してよい。しかしながら、溶融混練工程は下記数式(I)に示す条件を満たすように実施されることが好ましい。
ここで、数式(I)中、πは円周率であり、Dはスクリューの外径(mm)、Rはスクリューの回転数(1/s)、Xはバレルの内周面とスクリューとの隙間における最狭窄部の幅(mm)を表す。なお、外径D(mm)は、より正確には、スクリューの軸方向と直交する断面における最大半径の2倍の値を意味する。また、スクリューの軸方向に対して、スクリューの外径が変化する場合は、式(I)における外径Dは、最狭窄部の幅Xにおけるスクリューの外径を意味する。
-ポリアリールエーテルケトン樹脂-
P1: VESTAKEEP M2G(ポリエーテルエーテルケトン樹脂、ダイセルエボニック社製、溶融粘度238Pa・s)
P2: VESTAKEEP ZV7401(ポリエーテルエーテルケトン樹脂、ダイセルエボニック社製、溶融粘度224Pa・s)
P3: VESTAKEEP ZV7402(ポリエーテルエーテルケトン樹脂、ダイセルエボニック社製、溶融粘度254Pa・s)
P4: PEEK OPTIMA LT2(ポリエーテルエーテルケトン樹脂、ビクトレックス社製、溶融粘度330Pa・s)
P5: VICTREXPEEK 90G(ポリエーテルエーテルケトン樹脂、ビクトレックス社製、溶融粘度131Pa・s)
P6: VESTAKEEP 1000G(ポリエーテルエーテルケトン樹脂、ダイセルエボニック社製、溶融粘度174Pa・s)
P7: VESTAKEEP 3300G(ポリエーテルエーテルケトン樹脂、ダイセルエボニック社製、溶融粘度450Pa・s)
P8: VICTREXPEEK381G(ポリエーテルエーテルケトン樹脂、ビクトレックス社製、溶融粘度360Pa・S)
P9: VICTREXPEEK450G(ポリエーテルエーテルケトン樹脂、ビクトレックス社製、溶融粘度452Pa・S)
P10: VESTAKEEP4000P(ポリエーテルエーテルケトン樹脂、ダイセルエボニック社製、溶融粘度539Pa・S)
-無機粒子-
F1:シリカ(球状、体積平均粒径1.0μm)
F2:シリカ(球状、体積平均粒径3.8μm)
F3:シリカ(球状、体積平均粒径0.07μm)
F4:チタニア(不定形、体積平均粒径0.3μm)
MPS:γ-メタクリロイロキシプロピルトリメトキシシラン
BPS:ベンゾイルプロピルトリメトキシシラン
長さ10.0mm、直径φ1.0mmのサイズを有する少なくとも400度の加熱機構付きのキャピラリーレオメータであるキャピログラフ1D(東洋精機製作所製)を用い、試験温度370度、せん断速度が1220[1/s]となるようにピストンの試験速度を調整し、溶融粘度[Pa・s]を測定した。
縦2mm×横2mm×長さ25mmの試験片を作製し、オートグラフ(島津製作所製)にて支点間距離20mm、クロスヘッドスピード1mm/minにて3点曲げ試験を行なった。そして、JIS T6517に基づき、曲げ強さ[MPa]を求めた。
計10本の試験片(縦2mm×横2mm×長さ25mm)について試験を行い、ストローク3mmのひずみを負荷させた場合に破折を起こさなかった割合を破折耐性[%]で表した。
曲げ弾性率は接線法(JIS K7074)に基づき、縦2mm×横2mm×長さ25mmの試験片について応力5Nから10Nまでの曲げ荷重-たわみ曲線の勾配より算出した。
上述した各種のフィラー成分は、以下に示す手順で表面処理した。まず、無機粒子を100g、トルエンを200ml計量混合したのちホモジナイザーで一次粒子まで分散させたスラリーを作製した。次に、還流冷却管をセットした三口フラスコ中に、上記スラリーを投入した後、さらに表面処理剤を2.4g加えた。続いて、三口フラスコ内の溶液を攪拌しながら2時間加熱還流を行った。続いて、遠心分離機を用いて、加熱還流処理された溶液から固形分を分別した。その後、この固形分を、トルエンで2回洗浄した後、真空乾燥機にて90℃10時間乾燥を行った。これにより表面処理された無機粒子を得た。
(A)ポリアリールエーテルケトン樹脂P1を100体積部、(B)無機粒子F1を39体積部計量し、これを二軸押出成形装置(スクリューの外径D:14.40mm、最狭窄部の幅X:0.15mm、外径Dおよび幅Xの測定時の温度25℃)へ投入した。試験温度:370℃、スクリューの回転数R:16.67s-1(1000rpm)の条件で溶融混練を行った後に、溶融混練物を回収し、これを熱プレス成形機を用いて板状(縦40mm×横40×厚み2mm)に加圧プレス成形し、徐冷することで樹脂複合材料を得た。得られた樹脂複合材料の原料組成及び評価結果を表1に示す。
用いた(A)ポリアリールエーテルケトン樹脂および(B)無機粒子の種類・配合量、ならびに試験条件を表1に示す条件に変更した以外は、実施例1と同様の方法により樹脂複合材料を得た。得られた樹脂複合材料の原料組成及び評価結果を表1に示す。なお、表1中、(π×D×R)/Xの値が実施例1とは異なる値を持つ実施例11~14については、実施例1で用いた二軸押出成形装置において、スクリューの回転数Rを変更することで(π×D×R)/Xの値を調整した。
使用した二軸押出成形装置について、スクリューの外径Dを10.64mm、最狭窄部の幅Xを0.18mm(外径Dおよび幅Xの測定時の温度25℃)に変更し、さらに、スクリューの回転数Rを実施例16、18については8.33s-1(500rpm)に変更し、実施例17については5.00s-1(300rpm)に変更した以外は実施例1と同様の方法により樹脂複合材料を得た。得られた樹脂複合材料の原料組成及び評価結果を表1に示す。なお、表1中において、実施例18の「(A)ポリアリールエーテルケトン樹脂」の欄の括弧内に示す値は、樹脂全量を100質量%とした場合の質量基準の配合比率(質量%)である。
原料としてポリアリールエーテルケトン樹脂P5を用いた以外は、実施例1と同様の方法により樹脂複合材料を得た。得られた樹脂複合材料の原料組成及び評価結果を表1に示す。曲げ試験の結果、全ての試験片が破断し強靭性は低かった。
原料としてポリアリールエーテルケトン樹脂P6を用いた以外は、実施例1と同様の方法により樹脂複合材料を得た。得られた樹脂複合材料の原料組成及び評価結果を表1に示す。曲げ試験の結果、全ての試験片が破断し強靭性は低かった。
原料としてポリアリールエーテルケトン樹脂P7を用いた以外は、実施例1と同様の方法により溶融混練を行ったが、混練中に二軸押出成形装置が過負荷により停止したため樹脂複合材料を得る事が出来なかった。
無機粒子の配合量を15体積部に変更した以外は、実施例1と同様の方法により樹脂複合材料を得た。得られた樹脂複合材料の原料組成及び評価結果を表1に示す。曲げ試験の結果、弾性率が低く剛性に劣っていた。
無機粒子の配合量を89体積部に変更した以外は、実施例1と同様の方法により樹脂複合材料を得た。得られた樹脂複合材料の原料組成及び評価結果を表1に示す。曲げ試験の結果、全ての試験片が破断し強靭性は低かった。
原料としてポリアリールエーテルケトン樹脂P8、P9を用いた以外は、実施例1と同様の方法により溶融混練を行ったが、混練中に二軸押出成形装置が過負荷により停止したため樹脂複合材料を得る事が出来なかった。
2 スクリュー
r スクリュー2の最大半径
X 最狭窄部の幅
Claims (8)
- (A)温度370℃、せん断速度1220[1/s]における溶融粘度が210~350[Pa・s]であるポリアリールエーテルケトン樹脂100体積部と、
(B)無機粒子20~60体積部と、を含むことを特徴とする樹脂複合材料。 - (B)無機粒子が、シリカ系無機粒子であることを特徴とする請求項1に記載の樹脂複合材料。
- (B)無機粒子が、シランカップリング剤により表面処理されてなることを特徴とする請求項1又は2に記載の樹脂複合材料。
- (B)無機粒子の体積平均粒子径が0.01~10μmであることを特徴とする請求項1~3のいずれか一項に記載の樹脂複合材料。
- 歯科用である請求項1~4のいずれか一項に記載の樹脂複合材料。
- 顔料をさらに含むことを特徴とする請求項1~5のいずれか1つに記載の樹脂複合材料。
- (A)ポリアリールエーテルケトン樹脂および(B)無機粒子を含む原料を、原料投入口を有するバレルと前記バレル内に回転可能に配置されたスクリューとを備えた溶融混練装置の前記原料投入口から投入し、且つ、下式(I)を満たすように溶融混練することで作製された請求項1~5のいずれか1つに記載の樹脂複合材料。
500≦(π×D×R)/X 数式(I)
〔前記数式(I)中、Dは前記スクリューの外径(mm)、Rは前記スクリューの回転数(1/s)、Xは前記バレルの内周面と前記スクリューとの隙間における最狭窄部の幅(mm)を表す。〕 - (A)温度370℃、せん断速度1220[1/s]における溶融粘度が210~350[Pa・s]であるポリアリールエーテルケトン樹脂100体積部および(B)無機粒子20~60体積部を含む原料を、原料投入口を有するバレルと前記バレル内に回転可能に配置されたスクリューとを備えた溶融混練装置の前記原料投入口から投入し、且つ、下式(I)を満たすように溶融混練する溶融混練工程を、少なくとも経て樹脂複合材料を製造することを特徴とする樹脂複合材料の製造方法。
500≦(π×D×R)/X 数式(I)
〔前記数式(I)中、Dは前記スクリューの外径(mm)、Rは前記スクリューの回転数(1/s)、Xは前記バレルの内周面と前記スクリューとの隙間における最狭窄部の幅(mm)を表す。〕
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| WO2018105443A1 (ja) * | 2016-12-09 | 2018-06-14 | 株式会社トクヤマデンタル | 歯科用ポリアリールエーテルケトン樹脂材料 |
| JP2018095620A (ja) * | 2016-12-15 | 2018-06-21 | 株式会社トクヤマデンタル | 歯科用樹脂複合材料 |
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Also Published As
| Publication number | Publication date |
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| EP3141581B1 (en) | 2025-11-05 |
| US20170044348A1 (en) | 2017-02-16 |
| JP6576333B2 (ja) | 2019-09-18 |
| JPWO2015170649A1 (ja) | 2017-04-20 |
| EP3141581A1 (en) | 2017-03-15 |
| EP3141581A4 (en) | 2018-01-03 |
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