WO2022185648A1 - 粉体、フィラー、組成物、フィラーの製造方法 - Google Patents
粉体、フィラー、組成物、フィラーの製造方法 Download PDFInfo
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- WO2022185648A1 WO2022185648A1 PCT/JP2021/045581 JP2021045581W WO2022185648A1 WO 2022185648 A1 WO2022185648 A1 WO 2022185648A1 JP 2021045581 W JP2021045581 W JP 2021045581W WO 2022185648 A1 WO2022185648 A1 WO 2022185648A1
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- 239000000843 powder Substances 0.000 title claims abstract description 79
- 239000000945 filler Substances 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000203 mixture Substances 0.000 title claims description 5
- 239000002245 particle Substances 0.000 claims abstract description 86
- JUWGUJSXVOBPHP-UHFFFAOYSA-B titanium(4+);tetraphosphate Chemical compound [Ti+4].[Ti+4].[Ti+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O JUWGUJSXVOBPHP-UHFFFAOYSA-B 0.000 claims abstract description 32
- 238000002834 transmittance Methods 0.000 abstract description 22
- 239000000463 material Substances 0.000 abstract description 7
- 230000003287 optical effect Effects 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000010936 titanium Substances 0.000 description 27
- 239000002002 slurry Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 16
- 239000013078 crystal Substances 0.000 description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 14
- 239000007787 solid Substances 0.000 description 14
- 239000011259 mixed solution Substances 0.000 description 13
- 235000013339 cereals Nutrition 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- 239000011164 primary particle Substances 0.000 description 10
- 150000001875 compounds Chemical class 0.000 description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 7
- 238000009830 intercalation Methods 0.000 description 7
- 230000002687 intercalation Effects 0.000 description 7
- 229910052698 phosphorus Inorganic materials 0.000 description 7
- 239000011574 phosphorus Substances 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- 229910000349 titanium oxysulfate Inorganic materials 0.000 description 7
- 241000209094 Oryza Species 0.000 description 6
- 235000007164 Oryza sativa Nutrition 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 235000009566 rice Nutrition 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000001186 cumulative effect Effects 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 229910052809 inorganic oxide Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- XMSXQFUHVRWGNA-UHFFFAOYSA-N Decamethylcyclopentasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 XMSXQFUHVRWGNA-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229940008099 dimethicone Drugs 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000003703 image analysis method Methods 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
- C08K7/00—Use of ingredients characterised by shape
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/37—Phosphates of heavy metals
- C01B25/372—Phosphates of heavy metals of titanium, vanadium, zirconium, niobium, hafnium or tantalum
-
- 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
- C08K3/32—Phosphorus-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/51—Particles with a specific particle size distribution
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
Definitions
- the present invention relates to powders, fillers, compositions, and methods for producing fillers.
- Patent Document 1 as inorganic particles useful for blending into a light scatterer (sheet), a nucleus containing silica as a main component and an oxide of a metal of Group 4 or Group 14 of the periodic table other than silica and silicon and a coating layer of a silica-based composite oxide containing as a main component, and inorganic oxide particles formed by a coating layer.
- the inorganic oxide particles have an average particle diameter of 1.1 to 10 ⁇ m and a circularity of 0.8 or more as determined from an electron microscope image.
- the coating layer has a thickness of 0.03 ⁇ m or more and contains 22 to 70 mol % of oxides of metals of Groups 4 and 14 of the periodic table other than silicon.
- Patent Document 2 discloses a light-extracting resin composition capable of sufficiently increasing the light-extraction efficiency of a light-emitting device.
- a light extraction resin composition capable of forming a light extraction layer capable of the use of a filler having an average particle size of 0.5 to 50 ⁇ m is described.
- Patent Document 3 for the purpose of providing a film containing intercalation compound particles having excellent adhesiveness at the interface with a matrix polymer, a film comprising a layered substance and an organic substance, wherein the organic substance is intercalated between the layers of the layered substance, is disclosed.
- 0.01% to 80% by mass of intercalation compound particles containing 1% to 15% by mass, having an average particle size of 5 ⁇ m or less and having a proportion of coarse particles of 10 ⁇ m or more being 10% or less by mass;
- a containing film is described.
- the intercalation compound is a compound in which an organic substance exists between layers of a layered material.
- methods for obtaining a layered compound having a fine particle size include a method using an ordinary pulverization method and a sizing method, and that the intercalation compound obtained by synthesis has fine particles. It is described that the intercalation compound particles can be easily obtained, and that the particle shape of the intercalation compound particles may be spherical, plate-like, irregular, or the like, but it is preferable that the intercalation compound particles are as close to spherical as possible.
- An object of the present invention is to provide a powder with high transmittance that is suitable as an optical material or resin filler that requires transparency.
- a first aspect of the present invention consists of crystalline plate-like titanium phosphate particles, and the proportion of particles having a particle size of 0.52 ⁇ m or more and 0.87 ⁇ m or less is 7.0% by mass or less.
- a second aspect of the present invention is a method for producing a filler comprising a powder of crystalline plate-like titanium phosphate particles, wherein the ratio of particles having a particle size of 0.52 ⁇ m or more and 0.87 ⁇ m or less in the powder is 7.0 ⁇ m or more.
- a method for producing a filler including a step of confirming that the content is 0% by mass or less.
- FIG. 1 is a graph showing the relationship between the total light transmittance and the proportion of particles having a particle size of 0.52 ⁇ m or more and 0.87 ⁇ m or less for samples Nos. 1 to 9.
- FIG. 1 is a graph showing the relationship between the total light transmittance and the proportion of particles having a particle size of 0.52 ⁇ m or more and 0.87 ⁇ m or less for samples Nos. 1 to 9.
- the filler of this embodiment is a powder composed of crystalline plate-like titanium phosphate particles, and in this powder, the proportion of particles having a particle size of 0.52 ⁇ m or more and 0.87 ⁇ m or less is 7.0% by mass or less. .
- the aspect ratio of the crystalline plate-like titanium phosphate particles is 5 or more.
- This filler can be obtained, for example, by the following method. First, an aqueous solution of titanyl sulfate and an aqueous solution of phosphoric acid are mixed at a ratio [P]/[Ti] of the molar concentration of phosphorus [P] to the molar concentration of titanium [Ti] of 5 or more and 21 or less to obtain a mixed solution. obtain. Next, this mixed liquid is placed in a sealed container, the temperature is maintained at a value within the range of 100° C. or higher and 160° C. or lower, and the mixture is reacted for a predetermined time (for example, 5 hours or longer). That is, hydrothermal synthesis is performed. The pressure inside the sealed container is higher than the atmospheric pressure, which is naturally determined by the pressurization temperature. Thus, a slurry containing crystal particles of titanium phosphate is obtained.
- the solid content (titanium phosphate crystal particles) is separated from the slurry.
- the obtained solid content is washed with a washing liquid consisting of water or ammonia water (ammonium hydroxide), and then dried. Thereby, a powder of crystalline plate-like titanium phosphate is obtained.
- the particle size distribution of the obtained crystalline plate-like titanium phosphate powder was measured. Since it can be expected to have a high total light transmittance, it is used as it is as a filler.
- the particle size distribution of the powder of the obtained crystalline plate-like titanium phosphate shows that the ratio of particles having a particle size of 0.52 ⁇ m or more and 0.87 ⁇ m or less exceeds 7.0% by mass, the particle size is 0.52 ⁇ m.
- Powders of crystalline plate-like titanium phosphate having different particle size distributions are mixed so that the ratio of particles having a diameter of 0.87 ⁇ m or less is 7.0% by mass or less.
- a powder of crystalline plate-like titanium phosphate in which the proportion of particles having a particle size of 0.52 ⁇ m or more and 0.87 ⁇ m or less is 7.0 mass % or less is used as a filler.
- the method for producing a filler according to this embodiment is a method for producing a filler composed of a powder of crystalline plate-like titanium phosphate particles, and the powder has a particle size of 0.52 ⁇ m or more and 0.87 ⁇ m or less. A step of confirming that the ratio is 7.0% by mass or less is included. Therefore, a filler having a high total light transmittance can be produced.
- the lid was opened and the slurry in the container was cooled to room temperature, then taken out from the container and filtered to separate the solid content from the slurry. After the solid content was washed with water, it was dried (at a temperature of 105° C. and left for 24 hours) to obtain a powder.
- the particles constituting the powder were crystalline titanium phosphate having a structural formula of Ti(HPO 4 ) 2 ⁇ H 2 O. It could be confirmed.
- the obtained powder was observed with a scanning electron microscope, it was confirmed that the particles constituting the powder had a plate-like shape, and included many hexagonal plate-like particles.
- the volume D50% thickness was 0.29 ⁇ m
- the CV value was 0.45
- the volume D50% thickness was 0.030 ⁇ m.
- the aspect ratio of the crystal grains constituting the obtained powder was 10 by calculation (0.29/0.030) using the measured values of the volume D50% thickness and volume D50% diameter. Further, using the same analysis software, the proportion of particles having a particle size in the range of 0.52 ⁇ m to 0.87 ⁇ m was examined, and found to be 5.82% by mass.
- the total light transmittance was measured by the following method, it was 89.5%.
- the powder was dispersed in a cyclopentasiloxane solution of (acrylates/dimethicone) copolymer (KP-545 manufactured by Shin-Etsu Chemical Co., Ltd.) to prepare a 10% by mass slurry, and this slurry was applied to a slide having a thickness of 1 mm.
- a test sample was obtained by coating on glass to form a coating film having a thickness of 25 ⁇ m and drying it.
- the resulting test sample was subjected to a haze meter "Haze Guard i" manufactured by BYK-Chemie Japan Co., Ltd. to measure the total light transmittance under C light source in accordance with ASTM standard "D 1003".
- the lid was opened and the slurry in the container was cooled to room temperature, then taken out from the container and filtered to separate the solid content from the slurry. After the solid content was washed with water, it was dried (at a temperature of 105° C. and left for 24 hours) to obtain a powder.
- the particles constituting the powder were crystalline titanium phosphate having a structural formula of Ti(HPO 4 ) 2 ⁇ H 2 O. It could be confirmed.
- the obtained powder was observed with a scanning electron microscope, it was confirmed that the particles constituting the powder had a plate-like shape, and included many hexagonal plate-like particles.
- volume D50% diameter, CV value (standard deviation/number average primary particle size), and volume D50% thickness of the crystal grains constituting the obtained powder were measured in the same manner as for synthetic product A.
- the D50% diameter was 0.53 ⁇ m
- the CV value was 0.34
- the volume D50% thickness was 0.065 ⁇ m.
- the aspect ratio of the crystal grains constituting the obtained powder was 8 by calculation (0.53/0.065) using the measured values of the volume D50% thickness and volume D50% diameter. Furthermore, when the ratio of particles having a particle size in the range of 0.52 ⁇ m to 0.87 ⁇ m was examined by the same method as for synthetic product A, it was 72.64% by mass. Further, when the total light transmittance was measured in the same manner as for synthetic product A, it was 85.1%.
- the lid was opened and the slurry in the container was cooled to room temperature, then taken out from the container and filtered to separate the solid content from the slurry. After the solid content was washed with water, it was dried (at a temperature of 105° C. and left for 24 hours) to obtain a powder.
- the particles constituting the powder were crystalline titanium phosphate having a structural formula of Ti(HPO 4 ) 2 ⁇ H 2 O. It could be confirmed.
- the obtained powder was observed with a scanning electron microscope, it was confirmed that the particles constituting the powder had a plate-like shape, and included many hexagonal plate-like particles.
- volume D50% diameter, CV value (standard deviation/number average primary particle size), and volume D50% thickness of the crystal grains constituting the obtained powder were measured in the same manner as for synthetic product A.
- the D50% diameter was 0.74 ⁇ m
- the CV value was 0.42
- the volume D50% thickness was 0.090 ⁇ m.
- the aspect ratio of the crystal grains constituting the obtained powder was 8 by calculation (0.74/0.090) using the measured values of the volume D50% thickness and volume D50% diameter. Furthermore, when the ratio of particles having a particle size in the range of 0.52 ⁇ m to 0.87 ⁇ m was examined by the same method as for synthetic product A, it was 67.10% by mass. Further, when the total light transmittance was measured in the same manner as for synthetic product A, it was 85.4%.
- ⁇ Synthetic product D> First, an aqueous solution of titanyl sulfate and an aqueous solution of phosphoric acid are mixed in such a ratio that the ratio [P]/[Ti] of the molar concentration [P] of phosphorus to the molar concentration [Ti] of titanium is 10.2 to obtain a mixed solution. rice field. Next, this mixed solution was placed in a 200 L autoclave and reacted for 5 hours while maintaining the temperature at 110°C.
- the lid was opened and the slurry in the container was cooled to room temperature, then taken out from the container and filtered to separate the solid content from the slurry.
- the solid content was washed with 29% aqueous ammonia (aqueous solution of ammonium salt) and dried (at 105° C. for 24 hours) to obtain powder.
- aqueous ammonia aqueous solution of ammonium salt
- the particles constituting the powder were crystalline titanium phosphate having a structural formula of Ti(HPO 4 ) 2 ⁇ H 2 O. It could be confirmed.
- the obtained powder was observed with a scanning electron microscope, it was confirmed that the particles constituting the powder had a plate-like shape, and included many hexagonal plate-like particles.
- volume D50% diameter, CV value (standard deviation/number average primary particle size), and volume D50% thickness of the crystal grains constituting the obtained powder were measured in the same manner as for synthetic product A.
- the D50% diameter was 1.11 ⁇ m
- the CV value was 0.33
- the volume D50% thickness was 0.143 ⁇ m.
- the aspect ratio of the crystal grains constituting the obtained powder was 8 by calculation (1.11/0.143) using the measured values of the volume D50% thickness and volume D50% diameter. Furthermore, when the ratio of particles having a particle size in the range of 0.52 ⁇ m to 0.87 ⁇ m was examined by the same method as for synthetic product A, it was 16.97% by mass. Further, when the total light transmittance was measured in the same manner as for synthetic product A, it was 87.1%.
- ⁇ Synthetic product E> First, an aqueous titanyl sulfate solution and an aqueous phosphoric acid solution are mixed at a ratio [P]/[Ti] of the molar concentration [P] of phosphorus to the molar concentration [Ti] of titanium to obtain a mixed solution. rice field. Next, this mixed solution was placed in a 1.4 L autoclave and reacted for 5 hours while maintaining the temperature at 120°C.
- the lid was opened and the slurry in the container was cooled to room temperature, then taken out from the container and filtered to separate the solid content from the slurry. After the solid content was washed with water, it was dried (at a temperature of 105° C. and left for 24 hours) to obtain a powder.
- the particles constituting the powder were crystalline titanium phosphate having a structural formula of Ti(HPO 4 ) 2 ⁇ H 2 O. It could be confirmed.
- the obtained powder was observed with a scanning electron microscope, it was confirmed that the particles constituting the powder had a plate-like shape, and included many hexagonal plate-like particles.
- volume D50% diameter, CV value (standard deviation/number average primary particle size), and volume D50% thickness of the crystal grains constituting the obtained powder were measured in the same manner as for synthetic product A.
- the D50% diameter was 2.07 ⁇ m
- the CV value was 0.37
- the volume D50% thickness was 0.302 ⁇ m.
- the aspect ratio of the crystal grains constituting the obtained powder was 7 by calculation (2.07/0.302) using the measured values of the volume D50% thickness and volume D50% diameter. Furthermore, when the ratio of particles having a particle size in the range of 0.52 ⁇ m to 0.87 ⁇ m was examined by the same method as for synthetic product A, it was 1.05% by mass. Further, when the total light transmittance was measured in the same manner as for synthetic product A, it was 90.3%.
- ⁇ Synthetic product F> First, an aqueous titanyl sulfate solution and an aqueous phosphoric acid solution are mixed at a ratio [P]/[Ti] of the molar concentration [P] of phosphorus to the molar concentration [Ti] of titanium to obtain a mixed solution. rice field. Next, this mixed solution was placed in a 200 L autoclave and reacted for 5 hours while maintaining the temperature at 130°C.
- the lid was opened and the slurry in the container was cooled to room temperature, then taken out from the container and filtered to separate the solid content from the slurry. After the solid content was washed with water, it was dried (at a temperature of 105° C. and left for 24 hours) to obtain a powder.
- the particles constituting the powder were crystalline titanium phosphate having a structural formula of Ti(HPO 4 ) 2 ⁇ H 2 O. It could be confirmed.
- the obtained powder was observed with a scanning electron microscope, it was confirmed that the particles constituting the powder had a plate-like shape, and included many hexagonal plate-like particles.
- volume D50% diameter, CV value (standard deviation/number average primary particle size), and volume D50% thickness of the crystal grains constituting the obtained powder were measured in the same manner as for synthetic product A.
- the D50% diameter was 7.44 ⁇ m
- the CV value was 0.36
- the volume D50% thickness was 0.856 ⁇ m.
- the aspect ratio of the crystal grains constituting the obtained powder was 9 by calculation (7.44/0.856) using the measured values of volume D50% thickness and volume D50% diameter. Furthermore, when the ratio of particles having a particle size in the range of 0.52 ⁇ m to 0.87 ⁇ m was examined by the same method as for synthetic product A, it was found to be 0.00% by mass. Further, when the total light transmittance was measured in the same manner as for synthetic product A, it was 91.4%.
- FIG. 1 graphically shows the relationship between the total light transmittance of the synthesized titanium phosphate powders A to F and the volume-based cumulative 50% primary particle diameter (volume D50% diameter). From the graph of FIG. 1, it can be seen that the total light transmittance becomes a minimum value when the volume D50% diameter is around 0.53 ⁇ m and 0.74 ⁇ m.
- Titanium phosphate powders No. 1 to No. 6 are the titanium phosphate powders of synthetic products A to D, respectively. Since titanium phosphate powders No. 7 to No. 9 are mixed products, the volume D50% diameter, CV value, and volume D50% thickness were measured by the above-described methods, and the aspect ratio was calculated. Further, the ratio of particles having a particle size in the range of 0.52 ⁇ m or more and 0.87 ⁇ m or less was examined by the same method as for synthetic product A, and the total light transmittance was measured by the same method as for synthetic product A.
- Table 1 shows the composition of each powder, the ratio of particles with a particle size in the range of 0.52 ⁇ m to 0.87 ⁇ m, the volume D50% diameter, the CV value, the volume D50% thickness, the aspect ratio, and the total light transmittance.
- FIG. 2 graphically shows the relationship between the total light transmittance and the proportion of particles having a particle size of 0.52 ⁇ m or more and 0.87 ⁇ m or less for samples Nos. 1-9.
- the results show the following. No. 1, No. 5, No. 6, and No. 1, No. 5, No. 6, and No. 1, No. 5, No. 6, and No. 1, No. 5, No. 6, and Nos.
- the total light transmittance of the .9 powder was as high as 89.5% or more and 91.4% or less, but the content of particles in the range of 0.52 ⁇ m or more and 0.87 ⁇ m or less was 7.22% by mass.
- the total light transmittance of the powders No. 2 to No. 4, No. 7 and No. 8 was as low as 84.1% or more and 87.1% or less.
- the powder containing 5.82% by mass or less (7.0% by mass or less) of particles having a particle size in the range of 0.52 ⁇ m or more and 0.87 ⁇ m or less is a filler for optical materials or resins that require transparency. It can be said that it is suitable as
- the manufacturing method of the titanium phosphate powder for filler is defined as "the powder composed of crystalline plate-like titanium phosphate particles has a content of particles in the range of 0.52 ⁇ m or more and 0.87 ⁇ m or less in diameter of 7.0. By including the step of confirming that the content is not more than % by mass, it is possible to produce a titanium phosphate filler powder that is suitable as a filler for optical materials and resins that require transparency.
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Abstract
Description
特許文献1には、光散乱体(シート)への配合用として有用な無機粒子として、シリカを主成分とする核部と、シリカとシリコン以外の周期表4族または14族の金属の酸化物とを主成分とするシリカ系複合酸化物の被覆層と、で形成された無機酸化物粒子が記載されている。この無機酸化物粒子の平均粒子径は1.1~10μmであり、電子顕微鏡の撮影像から求められる円形度が0.8以上である。また、被覆層は0.03μm以上の厚みを有し、シリコン以外の周期表4族または14族の金属の酸化物を22~70モル%の範囲で含有している。
また、特許文献3には、粒径の細かい層状化合物を得るための方法としては通常の粉砕方法と分粒方法を用いる方法が挙げられること、合成で得られる合成物の層間化合物は細かい粒子が得られやすいこと、層間化合物粒子の粒形は球状、板状、不定形などいずれでもかまわないが、できるだけ球状に近いものが好ましいことが記載されている。
本発明の第二態様は、結晶性板状リン酸チタン粒子の粉体からなるフィラーの製造方法であって、この粉体における粒径0.52μm以上0.87μm以下の粒子の割合が7.0質量%以下になっていることを確認する工程を含むフィラーの製造方法を提供する。
画像解析法により、板状結晶の板面の最長となる対角線を一次粒子径として計測して、体積基準の累積50%一次粒子径(体積D50%径)を算出することができる。また、画像解析法により、板状結晶の側面の厚さを測定して、体積基準の累積50%厚さ(体積D50%厚さ)を算出することができる。アスペクト比は、体積D50%径を体積D50%厚さで除した値である。
先ず、硫酸チタニル水溶液とリン酸水溶液を、チタンのモル濃度[Ti]に対するリンのモル濃度[P]の比[P]/[Ti]が5以上21以下となる割合で混合して混合液を得る。次に、この混合液を密閉容器内に入れて、温度を100℃以上160℃以下の範囲内の値に保持し、所定時間(例えば、5時間以上)反応させる。つまり、水熱合成を行う。なお、密閉容器内の圧力は、加圧温度によって自然に決まる大気圧以上の圧力となっている。これにより、リン酸チタンの結晶粒子を含むスラリーを得る。
次に、得られた結晶性板状リン酸チタンの粉体の粒度分布を測定し、粒径0.52μm以上0.87μm以下の粒子の割合が7.0質量%以下になっていれば、全光線透過率が高いことが期待できるため、そのままフィラーとして使用する。
つまり、この実施形態のフィラーの製造方法は、結晶性板状リン酸チタン粒子の粉体からなるフィラーの製造方法であって、この粉体における粒径0.52μm以上0.87μm以下の粒子の割合が7.0質量%以下になっていることを確認する工程を含む。そのため、全光線透過率の高いフィラーが製造できる。
以下の方法で六種類(A~F)のリン酸チタンを合成した。
<合成品A>
先ず、硫酸チタニル水溶液とリン酸水溶液を、チタンのモル濃度[Ti]に対するリンのモル濃度[P]の比[P]/[Ti]が9.0となる割合で混合して混合液を得た。次に、この混合液を1.4Lのオートクレーブ内に入れて、温度を110℃に保持して、5時間反応させた。
得られた粉体を、X線回折装置を用いて分析した結果、粉体を構成する粒子は、構造式がTi(HPO4)2・H2Oである結晶性リン酸チタンであることが確認できた。
得られた粉体を走査型電子顕微鏡で観察したところ、粉体を構成する粒子の形状は板状であり、六角形の板状であるものを多く含むことが確認できた。
また、体積D50%厚さおよび体積D50%径の測定値を用いた計算(0.29/0.030)により、得られた粉体を構成する結晶粒子のアスペクト比は10であった。
さらに、同じ解析ソフトを用いて、粒径が0.52μm以上0.87μm以下の範囲の粒子の割合を調べたところ、5.82質量%であった。
先ず、粉体を(アクリレーツ/ジメチコン)コポリマーのシクロペンタシロキサン溶解品(信越化学工業株式会社製のKP―545)に分散させて10質量%のスラリーを作製し、このスラリーを厚さ1mmのスライドガラス上に塗布して、厚さ25μmの塗膜を形成し、乾燥させることで試験サンプルを得た。得られた試験サンプルをビックケミー・ジャパン株式会社製のヘーズメーター「ヘーズガードi」にかけて、ASTM標準「D 1003」に準拠するC光源における全光線透過率を測定した。
先ず、硫酸チタニル水溶液とリン酸水溶液を、チタンのモル濃度[Ti]に対するリンのモル濃度[P]の比[P]/[Ti]が10.7となる割合で混合して混合液を得た。次に、この混合液を1.4Lのオートクレーブ内に入れて、温度を110℃に保持して、5時間反応させた。
得られた粉体を、X線回折装置を用いて分析した結果、粉体を構成する粒子は、構造式がTi(HPO4)2・H2Oである結晶性リン酸チタンであることが確認できた。
得られた粉体を走査型電子顕微鏡で観察したところ、粉体を構成する粒子の形状は板状であり、六角形の板状であるものを多く含むことが確認できた。また、合成品Aと同じ方法で、得られた粉体を構成する結晶粒子の体積D50%径、CV値(標準偏差/数平均一次粒子径)、体積D50%厚さを測定したところ、体積D50%径は0.53μmであり、CV値は0.34であり、体積D50%厚さは0.065μmであった。
さらに、合成品Aと同じ方法で、粒径が0.52μm以上0.87μm以下の範囲の粒子の割合を調べたところ、72.64質量%であった。
また、合成品Aと同じ方法で全光線透過率を測定したところ、85.1%であった。
先ず、硫酸チタニル水溶液とリン酸水溶液を、チタンのモル濃度[Ti]に対するリンのモル濃度[P]の比[P]/[Ti]が10.4となる割合で混合して混合液を得た。次に、この混合液を1.4Lのオートクレーブ内に入れて、温度を110℃に保持して、5時間反応させた。
得られた粉体を、X線回折装置を用いて分析した結果、粉体を構成する粒子は、構造式がTi(HPO4)2・H2Oである結晶性リン酸チタンであることが確認できた。
得られた粉体を走査型電子顕微鏡で観察したところ、粉体を構成する粒子の形状は板状であり、六角形の板状であるものを多く含むことが確認できた。また、合成品Aと同じ方法で、得られた粉体を構成する結晶粒子の体積D50%径、CV値(標準偏差/数平均一次粒子径)、体積D50%厚さを測定したところ、体積D50%径は0.74μmであり、CV値は0.42であり、体積D50%厚さは0.090μmであった。
さらに、合成品Aと同じ方法で、粒径が0.52μm以上0.87μm以下の範囲の粒子の割合を調べたところ、67.10質量%であった。
また、合成品Aと同じ方法で全光線透過率を測定したところ、85.4%であった。
先ず、硫酸チタニル水溶液とリン酸水溶液を、チタンのモル濃度[Ti]に対するリンのモル濃度[P]の比[P]/[Ti]が10.2となる割合で混合して混合液を得た。次に、この混合液を200Lのオートクレーブ内に入れて、温度を110℃に保持して、5時間反応させた。
得られた粉体を、X線回折装置を用いて分析した結果、粉体を構成する粒子は、構造式がTi(HPO4)2・H2Oである結晶性リン酸チタンであることが確認できた。
得られた粉体を走査型電子顕微鏡で観察したところ、粉体を構成する粒子の形状は板状であり、六角形の板状であるものを多く含むことが確認できた。また、合成品Aと同じ方法で、得られた粉体を構成する結晶粒子の体積D50%径、CV値(標準偏差/数平均一次粒子径)、体積D50%厚さを測定したところ、体積D50%径は1.11μmであり、CV値は0.33であり、体積D50%厚さは0.143μmであった。
さらに、合成品Aと同じ方法で、粒径が0.52μm以上0.87μm以下の範囲の粒子の割合を調べたところ、16.97質量%であった。
また、合成品Aと同じ方法で全光線透過率を測定したところ、87.1%であった。
先ず、硫酸チタニル水溶液とリン酸水溶液を、チタンのモル濃度[Ti]に対するリンのモル濃度[P]の比[P]/[Ti]が6.9となる割合で混合して混合液を得た。次に、この混合液を1.4Lオートクレーブ内に入れて、温度を120℃に保持して、5時間反応させた。
得られた粉体を、X線回折装置を用いて分析した結果、粉体を構成する粒子は、構造式がTi(HPO4)2・H2Oである結晶性リン酸チタンであることが確認できた。
得られた粉体を走査型電子顕微鏡で観察したところ、粉体を構成する粒子の形状は板状であり、六角形の板状であるものを多く含むことが確認できた。また、合成品Aと同じ方法で、得られた粉体を構成する結晶粒子の体積D50%径、CV値(標準偏差/数平均一次粒子径)、体積D50%厚さを測定したところ、体積D50%径は2.07μmであり、CV値は0.37であり、体積D50%厚さは0.302μmであった。
さらに、合成品Aと同じ方法で、粒径が0.52μm以上0.87μm以下の範囲の粒子の割合を調べたところ、1.05質量%であった。
また、合成品Aと同じ方法で全光線透過率を測定したところ、90.3%であった。
先ず、硫酸チタニル水溶液とリン酸水溶液を、チタンのモル濃度[Ti]に対するリンのモル濃度[P]の比[P]/[Ti]が10.8となる割合で混合して混合液を得た。次に、この混合液を200Lのオートクレーブ内に入れて、温度を130℃に保持して、5時間反応させた。
得られた粉体を、X線回折装置を用いて分析した結果、粉体を構成する粒子は、構造式がTi(HPO4)2・H2Oである結晶性リン酸チタンであることが確認できた。
得られた粉体を走査型電子顕微鏡で観察したところ、粉体を構成する粒子の形状は板状であり、六角形の板状であるものを多く含むことが確認できた。また、合成品Aと同じ方法で、得られた粉体を構成する結晶粒子の体積D50%径、CV値(標準偏差/数平均一次粒子径)、体積D50%厚さを測定したところ、体積D50%径は7.44μmであり、CV値は0.36であり、体積D50%厚さは0.856μmであった。
さらに、合成品Aと同じ方法で、粒径が0.52μm以上0.87μm以下の範囲の粒子の割合を調べたところ、0.00質量%であった。
また、合成品Aと同じ方法で全光線透過率を測定したところ、91.4%であった。
合成されたA~Fのリン酸チタン粉体の全光線透過率と体積基準の累積50%一次粒子径(体積D50%径)との関係を、図1にグラフで示す。図1のグラフから、体積D50%径が0.53μmおよび0.74μm付近で全光線透過率が極小値となることが分かる。
合成されたA~Fのリン酸チタン粉体を下記の表1に示す割合で混合して、No.1~No.9のリン酸チタン粉体を得た。No.1~No.6のリン酸チタン粉体は、それぞれ合成品A~Dのリン酸チタン粉体そのままである。No.7~No.9のリン酸チタン粉体は混合品であるため、体積D50%径、CV値、体積D50%厚さを上述の方法で測定し、アスペクト比を算出した。さらに、合成品Aと同じ方法で、粒径が0.52μm以上0.87μm以下の範囲の粒子の割合を調べるとともに、合成品Aと同じ方法で全光線透過率を測定した。
結晶性板状リン酸チタン粒子からなり、粒径0.52μm以上0.87μm以下の範囲の粒子の含有率が5.82質量%以下であるNo.1、No.5、No.6、No.9の粉体の全光線透過率は、89.5%以上91.4%以下と高かったが、粒径0.52μm以上0.87μm以下の範囲の粒子の含有率が7.22質量%以上であるNo.2~No.4、No.7、No.8の粉体の全光線透過率は84.1%以上87.1%以下と低かった。
また、フィラー用リン酸チタン粉体の製造方法が、「結晶性板状リン酸チタン粒子からなる粉体が、粒径0.52μm以上0.87μm以下の範囲の粒子の含有率が7.0質量%以下となっていること」を確認する工程を含むことで、透明性が求められる光学材料や樹脂のフィラーとして好適なフィラー用リン酸チタン粉体を製造することができる。
Claims (4)
- 結晶性板状リン酸チタン粒子からなり、粒径0.52μm以上0.87μm以下の粒子の割合が7.0質量%以下である粉体。
- 請求項1記載の粉体からなるフィラー。
- 請求項2記載のフィラーを含む組成物。
- 結晶性板状リン酸チタン粒子の粉体からなるフィラーの製造方法であって、
前記粉体における粒径0.52μm以上0.87μm以下の粒子の割合が7.0質量%以下になっていることを確認する工程を含むフィラーの製造方法。
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WO2020059191A1 (ja) * | 2018-09-20 | 2020-03-26 | 株式会社フジミインコーポレーテッド | 化粧料用白色顔料、化粧料 |
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