WO2010131678A1 - ホスホン酸金属塩微粒子の製造方法 - Google Patents
ホスホン酸金属塩微粒子の製造方法 Download PDFInfo
- Publication number
- WO2010131678A1 WO2010131678A1 PCT/JP2010/058048 JP2010058048W WO2010131678A1 WO 2010131678 A1 WO2010131678 A1 WO 2010131678A1 JP 2010058048 W JP2010058048 W JP 2010058048W WO 2010131678 A1 WO2010131678 A1 WO 2010131678A1
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- WO
- WIPO (PCT)
- Prior art keywords
- metal salt
- phosphonic acid
- salt
- acid metal
- water
- Prior art date
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 112
- 239000002184 metal Substances 0.000 title claims abstract description 112
- 150000003839 salts Chemical class 0.000 title claims abstract description 105
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000010419 fine particle Substances 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 95
- 239000002245 particle Substances 0.000 claims abstract description 63
- 238000001035 drying Methods 0.000 claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 239000012736 aqueous medium Substances 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 230000007935 neutral effect Effects 0.000 claims abstract description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 8
- 125000004453 alkoxycarbonyl group Chemical group 0.000 claims abstract description 4
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 4
- 239000000047 product Substances 0.000 claims description 64
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 45
- 239000007864 aqueous solution Substances 0.000 claims description 36
- 239000003960 organic solvent Substances 0.000 claims description 21
- 229920005989 resin Polymers 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 19
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 17
- 239000004626 polylactic acid Substances 0.000 claims description 17
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- 239000012429 reaction media Substances 0.000 claims description 8
- 239000002244 precipitate Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 5
- 150000003751 zinc Chemical class 0.000 claims description 5
- 159000000009 barium salts Chemical class 0.000 claims description 4
- 159000000007 calcium salts Chemical class 0.000 claims description 4
- 150000001868 cobalt Chemical class 0.000 claims description 4
- 150000001879 copper Chemical class 0.000 claims description 4
- 229910003002 lithium salt Inorganic materials 0.000 claims description 4
- 159000000002 lithium salts Chemical class 0.000 claims description 4
- 159000000003 magnesium salts Chemical class 0.000 claims description 4
- 150000002696 manganese Chemical class 0.000 claims description 4
- 159000000000 sodium salts Chemical class 0.000 claims description 4
- 238000009835 boiling Methods 0.000 claims description 3
- 150000002505 iron Chemical class 0.000 claims description 3
- 239000011859 microparticle Substances 0.000 claims description 3
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 3
- 239000011342 resin composition Substances 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 2
- IIRVGTWONXBBAW-UHFFFAOYSA-M disodium;dioxido(oxo)phosphanium Chemical compound [Na+].[Na+].[O-][P+]([O-])=O IIRVGTWONXBBAW-UHFFFAOYSA-M 0.000 claims 2
- 229910001111 Fine metal Inorganic materials 0.000 claims 1
- -1 phosphonic acid compound Chemical class 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 78
- QLZHNIAADXEJJP-UHFFFAOYSA-N Phenylphosphonic acid Chemical compound OP(O)(=O)C1=CC=CC=C1 QLZHNIAADXEJJP-UHFFFAOYSA-N 0.000 description 32
- 239000000725 suspension Substances 0.000 description 32
- 239000000243 solution Substances 0.000 description 29
- 230000000052 comparative effect Effects 0.000 description 25
- 239000000706 filtrate Substances 0.000 description 24
- 239000000843 powder Substances 0.000 description 19
- 238000002425 crystallisation Methods 0.000 description 18
- 230000008025 crystallization Effects 0.000 description 18
- 238000001878 scanning electron micrograph Methods 0.000 description 17
- 238000003756 stirring Methods 0.000 description 17
- VYXPIEPOZNGSJX-UHFFFAOYSA-L zinc;dioxido-oxo-phenyl-$l^{5}-phosphane Chemical compound [Zn+2].[O-]P([O-])(=O)C1=CC=CC=C1 VYXPIEPOZNGSJX-UHFFFAOYSA-L 0.000 description 17
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 16
- 239000003484 crystal nucleating agent Substances 0.000 description 15
- 238000001914 filtration Methods 0.000 description 15
- NGFNIPDMIZZXLP-UHFFFAOYSA-L [Zn+2].[O-]P([O-])=O Chemical compound [Zn+2].[O-]P([O-])=O NGFNIPDMIZZXLP-UHFFFAOYSA-L 0.000 description 10
- SSTALXWJLKACQG-UHFFFAOYSA-L calcium;dioxido-oxo-phenyl-$l^{5}-phosphane Chemical compound [Ca+2].[O-]P([O-])(=O)C1=CC=CC=C1 SSTALXWJLKACQG-UHFFFAOYSA-L 0.000 description 9
- OMAAXMJMHFXYFY-UHFFFAOYSA-L calcium trioxidophosphanium Chemical compound [Ca+2].[O-]P([O-])=O OMAAXMJMHFXYFY-UHFFFAOYSA-L 0.000 description 8
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 description 8
- 239000011592 zinc chloride Substances 0.000 description 8
- 235000005074 zinc chloride Nutrition 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- 238000001291 vacuum drying Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 238000001953 recrystallisation Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 4
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 4
- LLSDKQJKOVVTOJ-UHFFFAOYSA-L calcium chloride dihydrate Chemical compound O.O.[Cl-].[Cl-].[Ca+2] LLSDKQJKOVVTOJ-UHFFFAOYSA-L 0.000 description 4
- 229940052299 calcium chloride dihydrate Drugs 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 238000006467 substitution reaction Methods 0.000 description 4
- YZYKBQUWMPUVEN-UHFFFAOYSA-N zafuleptine Chemical compound OC(=O)CCCCCC(C(C)C)NCC1=CC=C(F)C=C1 YZYKBQUWMPUVEN-UHFFFAOYSA-N 0.000 description 4
- 239000004246 zinc acetate Substances 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical compound [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 description 3
- 229960005147 calcium acetate Drugs 0.000 description 3
- 239000001639 calcium acetate Substances 0.000 description 3
- 235000011092 calcium acetate Nutrition 0.000 description 3
- XQKKWWCELHKGKB-UHFFFAOYSA-L calcium acetate monohydrate Chemical compound O.[Ca+2].CC([O-])=O.CC([O-])=O XQKKWWCELHKGKB-UHFFFAOYSA-L 0.000 description 3
- 229940067460 calcium acetate monohydrate Drugs 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 150000001242 acetic acid derivatives Chemical class 0.000 description 2
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- 150000003841 chloride salts Chemical class 0.000 description 2
- 238000000113 differential scanning calorimetry Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002411 thermogravimetry Methods 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- DDGPOBNMQLTKIJ-UHFFFAOYSA-N (4-butylphenyl)phosphonic acid Chemical compound CCCCC1=CC=C(P(O)(O)=O)C=C1 DDGPOBNMQLTKIJ-UHFFFAOYSA-N 0.000 description 1
- CRPRCSYCZWFVED-UHFFFAOYSA-N (4-ethylphenyl)phosphonic acid Chemical compound CCC1=CC=C(P(O)(O)=O)C=C1 CRPRCSYCZWFVED-UHFFFAOYSA-N 0.000 description 1
- LYNDWSARZJHIKU-UHFFFAOYSA-N (4-methylphenyl)phosphonic acid Chemical compound CC1=CC=C(P(O)(O)=O)C=C1 LYNDWSARZJHIKU-UHFFFAOYSA-N 0.000 description 1
- WTVNRJZKWMXPJC-UHFFFAOYSA-N (4-propan-2-ylphenyl)phosphonic acid Chemical compound CC(C)C1=CC=C(P(O)(O)=O)C=C1 WTVNRJZKWMXPJC-UHFFFAOYSA-N 0.000 description 1
- OSDKHNQHAQGIIN-UHFFFAOYSA-N (4-propylphenyl)phosphonic acid Chemical compound CCCC1=CC=C(P(O)(O)=O)C=C1 OSDKHNQHAQGIIN-UHFFFAOYSA-N 0.000 description 1
- SYOFLEWUZXUEKC-UHFFFAOYSA-N (4-tert-butylphenyl)phosphonic acid Chemical compound CC(C)(C)C1=CC=C(P(O)(O)=O)C=C1 SYOFLEWUZXUEKC-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- IVHVNMLJNASKHW-UHFFFAOYSA-M Chlorphonium chloride Chemical compound [Cl-].CCCC[P+](CCCC)(CCCC)CC1=CC=C(Cl)C=C1Cl IVHVNMLJNASKHW-UHFFFAOYSA-M 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- XOALAWRLOCRJRA-UHFFFAOYSA-N [2,5-bis(ethoxycarbonyl)phenyl]phosphonic acid Chemical compound CCOC(=O)C1=CC=C(C(=O)OCC)C(P(O)(O)=O)=C1 XOALAWRLOCRJRA-UHFFFAOYSA-N 0.000 description 1
- MGMGXZHNWAGNIS-UHFFFAOYSA-N [3,5-bis(ethoxycarbonyl)phenyl]phosphonic acid Chemical compound CCOC(=O)C1=CC(C(=O)OCC)=CC(P(O)(O)=O)=C1 MGMGXZHNWAGNIS-UHFFFAOYSA-N 0.000 description 1
- MPLIIEJXULZTBX-UHFFFAOYSA-N [3,5-bis(methoxycarbonyl)phenyl]phosphonic acid Chemical compound COC(=O)C1=CC(C(=O)OC)=CC(P(O)(O)=O)=C1 MPLIIEJXULZTBX-UHFFFAOYSA-N 0.000 description 1
- JMGIKIHJCSKLLI-UHFFFAOYSA-N [4-(2-methylpropyl)phenyl]phosphonic acid Chemical compound CC(C)CC1=CC=C(P(O)(O)=O)C=C1 JMGIKIHJCSKLLI-UHFFFAOYSA-N 0.000 description 1
- CDKIWUQCDBEVTR-UHFFFAOYSA-L [Zn++].[O-]P(=O)Oc1ccccc1.[O-]P(=O)Oc1ccccc1 Chemical compound [Zn++].[O-]P(=O)Oc1ccccc1.[O-]P(=O)Oc1ccccc1 CDKIWUQCDBEVTR-UHFFFAOYSA-L 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229920000229 biodegradable polyester Polymers 0.000 description 1
- 239000004622 biodegradable polyester Substances 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229960005069 calcium Drugs 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229960002713 calcium chloride Drugs 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000003754 ethoxycarbonyl group Chemical group C(=O)(OCC)* 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 125000001160 methoxycarbonyl group Chemical group [H]C([H])([H])OC(*)=O 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003009 phosphonic acids Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011110 re-filtration Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/38—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)]
- C07F9/3804—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)] not used, see subgroups
- C07F9/3834—Aromatic acids (P-C aromatic linkage)
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/38—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)]
- C07F9/40—Esters thereof
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
- C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
- C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
- C08K5/5333—Esters of phosphonic acids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
Definitions
- the present invention relates to a method for producing phosphonic acid metal salt fine particles, and particularly to a method for efficiently obtaining phosphonic acid metal salt fine particles having an average particle diameter of 0.01 to 0.5 ⁇ m.
- Polylactic acid resin a biodegradable polyester resin
- a molding material in various fields such as packaging materials such as containers and films, clothing materials, floor mats, textile materials such as automotive interior materials, and housings and parts for electrical and electronic products.
- packaging materials such as containers and films, clothing materials, floor mats, textile materials such as automotive interior materials, and housings and parts for electrical and electronic products.
- a crystal nucleating agent serves as a primary crystal nucleus of the crystalline polymer, promotes crystal growth, refines the crystal size, and increases the crystallization speed.
- Patent Document 1 As a crystal nucleating agent for polylactic acid resin, inorganic particles (Patent Document 1) composed of talc / boron nitride having a specific particle size or less, amide compounds represented by a specific formula (Patent Document 2), and a specific formula A sorbitol-based derivative (Patent Document 3), a phosphate ester metal salt represented by a specific formula (Patent Document 4), or a phosphonic acid metal salt (Patent Document 5 and Patent Document 6) is disclosed. .
- phosphonic acid metal salts that are said to have excellent performance are usually phosphonic acid compounds and metal ion sources such as metal hydroxides, metal oxides and metals in water or organic solvents. Manufactured by reacting with nitrate, metal acetate and the like.
- the size of the crystal nucleating agent can be reduced.
- the smaller the size of the crystal nucleating agent the larger the number of particles per mass and the surface area.
- the crystal nucleating agent particles themselves become finer, so that the transparency of the resin product is improved. Will lead to improved performance.
- a pulverization treatment or the like is performed as necessary in order to make the average particle diameter 10 ⁇ m or less.
- a phosphonic acid metal salt having an average particle diameter of a minimum of 1.1 ⁇ m was produced in the examples.
- JP-A-8-3432 Japanese Patent Laid-Open No. 10-87975 JP-A-10-158369 JP 2003-192883 A International Publication No. 2005/097894 JP 2008-156616 A
- the particles produced by the above-described method are particles of the order of several ⁇ m at most and more than 1 ⁇ m at the minimum. It took time and effort. Accordingly, it is an object of the present invention to propose a new production method capable of more efficiently producing particles having a smaller particle diameter, for example, particles of 0.5 ⁇ m or less, without requiring an operation such as pulverization. .
- the inventors of the present invention produced a phosphonic acid metal salt having a smaller size as a crystal nucleating agent, and introduced a base into the reaction system to neutralize the pH range.
- the obtained (precipitated) metal salt particles themselves can be made smaller, and further, by removing water as a reaction medium immediately after deposition of the metal salt, the particle size of the product can be reduced.
- the inventors have found that the state of small particles can be maintained without growing, and completed the present invention.
- the present invention provides, as a first aspect, a) a general formula (I)
- R 1 and R 2 each independently represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an alkoxycarbonyl group having 1 to 10 carbon atoms). Reacting with a base in an aqueous medium and adjusting the reaction system to a neutral to basic pH range, b) reacting the product obtained in step a) with a metal salt to precipitate the phosphonic acid metal salt from an aqueous medium; c) a step of removing water from the phosphonic acid metal salt of the precipitate obtained in step b), and d) a step of heating and drying the phosphonic acid metal salt from which the water obtained in step c) has been removed.
- the present invention relates to a method for producing metal phosphonate fine particles.
- the metal phosphonate is selected from the group consisting of lithium salt, sodium salt, potassium salt, magnesium salt, calcium salt, barium salt, iron salt, cobalt salt, copper salt, manganese salt and zinc salt. It is related with the manufacturing method of the phosphonic acid metal salt microparticles
- the present invention relates to a method for producing fine particles.
- b) the step of precipitating the phosphonic acid metal salt from the aqueous medium is performed by dropping the product obtained in step a) into the aqueous solution of the metal salt.
- the present invention relates to a method for producing metal phosphonate fine particles according to any one of the above.
- c) the step of removing water from the phosphonic acid metal salt of the deposit is performed by replacing water as a reaction medium with an organic solvent, and any one of the first to fourth aspects. The method for producing the phosphonic acid metal salt fine particles described in the item.
- the present invention relates to the method for producing phosphonic acid metal salt fine particles according to the fifth aspect, wherein the organic solvent is a water-soluble organic solvent having a boiling point of 120 ° C. or lower.
- the present invention relates to the method for producing phosphonic acid metal salt fine particles according to the sixth aspect, wherein the organic solvent is methanol, ethanol, or acetone.
- c) The step of removing water from the phosphonic acid metal salt of the precipitate is performed by drying under reduced pressure at 5 to 70 ° C.
- the phosphon according to any one of the first to seventh aspects.
- the present invention relates to a method for producing acid metal salt fine particles.
- the present invention relates to phosphonic acid metal salt fine particles obtained by the production method according to any one of the first aspect to the eighth aspect, wherein the average particle diameter is 0.01 to 0.5 ⁇ m.
- the polylactic acid resin composition containing 0.01 thru
- the base is first introduced into the reaction system to adjust the pH range to neutral or basic.
- the phosphonic acid compound is reacted with a base in an aqueous medium in advance.
- the product thus obtained is reacted with a metal salt as a metal source, whereby phosphone having an average particle size of 0.5 ⁇ m or less in the reaction medium (aqueous medium).
- Acid metal salts can be deposited.
- the production method of the present invention can produce phosphonic acid metal salt fine particles having an average particle diameter finer than that of the conventional production method, without requiring further steps such as pulverization.
- the fine particles obtained according to the present invention have a very fine particle size as compared with phosphonic acid metal salt particles having an average particle size of several ⁇ m obtained by a normal production method. Therefore, when the phosphonic acid metal salt fine particles obtained by the production method of the present invention are used as a crystal nucleating agent when producing a polyester resin such as polylactic acid resin or a crystalline polyolefin resin, the transparency and crystallinity of these resins are obtained. The effect of promoting crystallization can be improved.
- FIG. 1 is a scanning microscope (SEM) image of the phosphonic acid zinc salt produced in Example 1.
- FIG. 2 is a scanning microscope (SEM) image of the phosphonic acid zinc salt produced in Example 2.
- FIG. 3 is a view showing a scanning microscope (SEM) image of the phosphonic acid zinc salt produced in Example 3.
- 4 is a scanning microscope (SEM) image of the phosphonic acid zinc salt produced in Example 4.
- FIG. 5 is a scanning microscope (SEM) image of the phosphonic acid zinc salt produced in Example 5.
- 6 is a scanning microscope (SEM) image of the phosphonic acid zinc salt produced in Example 6.
- FIG. 7 shows a scanning microscope (SEM) image of the phosphonic acid zinc salt produced in Example 7.
- FIG. 8 is a view showing a scanning microscope (SEM) image of the phosphonic acid zinc salt produced in Comparative Example 1.
- 9 is a view showing a scanning microscope (SEM) image of the phosphonic acid zinc salt produced in Comparative Example 2.
- FIG. 10 is a view showing a scanning microscope (SEM) image of the phosphonic acid zinc salt produced in Comparative Example 3.
- FIG. 11 shows a scanning microscope (SEM) image of the calcium phosphonate salt produced in Example 9.
- 12 is a scanning microscope (SEM) image of the calcium phosphonate salt produced in Example 10.
- FIG. 13 is a view showing a scanning microscope (SEM) image of the calcium phosphonate produced in Example 11.
- FIG. 14 is a view showing a scanning microscope (SEM) image of the calcium phosphonate salt produced in Comparative Example 5.
- FIG. FIG. 15 is a view showing a scanning microscope (SEM) image of the calcium phosphonate salt produced in Comparative Example 6.
- 16 is a view showing a scanning microscope (SEM) image of the calcium phosphonate produced in Comparative Example 7.
- FIG. 17 is a view showing a scanning microscope (SEM) image of the calcium phosphonate salt produced in Comparative Example 8.
- SEM scanning microscope
- the present invention includes: a) a step of reacting a phosphonic acid compound with a base in an aqueous medium, and adjusting the reaction system to be in a neutral to basic pH range; b) a product obtained in step a).
- a phosphonic acid metal salt is precipitated from an aqueous medium by reacting with a metal salt, c) a step of removing water from the phosphonic acid metal salt of the precipitate obtained in step b), and d) obtained in step c). And a step of heating and drying the phosphonic acid metal salt from which water has been removed.
- the present inventors adjust the pH range of the reaction system by reacting a phosphonic acid compound that reacts with a metal salt with a base in an aqueous medium. Therefore, after the precipitation of the phosphonic acid metal salt, the pH of the reaction system is kept from weakly acidic to basic, and the reaction medium water is removed from the precipitated phosphonic acid metal salt as much as possible before heating and drying. did. This suppresses the equilibrium reaction between dissolution and recrystallization of the phosphonate metal salt in the reaction solution (aqueous medium) during precipitation of the phosphonate metal salt and residual water during drying, and thus increases the size of the metal salt particles. It became possible to suppress.
- the present invention will be described in more detail.
- the phosphonic acid compound used in the present invention is represented by the following general formula (I) It is a compound represented by these.
- R 1 and R 2 in the formula are a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a tert group,
- An alkyl group having 1 to 10 carbon atoms such as a butyl group, an alkoxycarbonyl group having 1 to 10 carbon atoms such as a methoxycarbonyl group or an ethoxycarbonyl group;
- R 1 and R 2 may be the same or different.
- phosphonic acid compound represented by the above formula (I) examples include phenylphosphonic acid, 4-methylphenylphosphonic acid, 4-ethylphenylphosphonic acid, 4-n-propylphenylphosphonic acid, 4-isopropylphenylphosphonic acid. Acid, 4-n-butylphenylphosphonic acid, 4-isobutylphenylphosphonic acid, 4-tert-butylphenylphosphonic acid, 3,5-dimethoxycarbonylphenylphosphonic acid, 3,5-diethoxycarbonylphenylphosphonic acid, 2, Examples include 5-dimethoxycarbonylphenylphosphonic acid and 2,5-diethoxycarbonylphenylphosphonic acid.
- the phosphonic acid compound represented by the above formula (I) is reacted with a base in an aqueous medium, and the pH range of the reaction system is previously neutral to basic, specifically, pH 7 to 14 or pH 7 to By adjusting to 11, the pH range of the reaction system can be kept weakly acidic or basic even after step b) described below (precipitation of the phosphonic acid metal salt).
- a base made to react with the said phosphonic acid compound For example, sodium hydroxide, sodium carbonate, sodium hydrogencarbonate etc. can be used.
- this step is carried out, for example, by mixing an aqueous solution of these bases with an aqueous solution of a phosphonic acid compound represented by the above formula (I).
- step b) The step of reacting the product obtained in step a) with a metal salt to precipitate the phosphonic acid metal salt from the aqueous medium
- the product obtained from the step a) (phosphonic acid compound)
- the reaction is performed by dropping the product into an aqueous solution containing the metal salt.
- the metal salt that is the metal source used in this step is preferably a water-soluble salt.
- the form of the salt is not particularly limited as long as it is water-soluble, and sulfates, nitrates, chlorides, carbonates, acetates and the like can be used, preferably chlorides or acetates.
- monovalent, divalent and trivalent metals can be used. In the metal, these metals can be used by mixing two or more kinds of metals.
- Specific examples of the metal salt include lithium salt, sodium salt, potassium salt, magnesium salt, aluminum salt, calcium salt, barium salt, manganese salt, iron salt, cobalt salt, nickel salt, copper salt, zinc salt and the like. .
- lithium salts sodium salts, potassium salts, magnesium salts, calcium salts, barium salts, iron salts, cobalt salts, copper salts, manganese salts, and zinc salts are preferable, and zinc salts are particularly preferable.
- the temperature at which the product (phosphonic acid compound-containing solution) obtained in step a) is reacted with an aqueous solution containing a metal salt can affect the particle size of the phosphonic acid metal salt fine particles obtained later. That is, the higher the reaction temperature, the higher the solubility of the precipitated phosphonic acid metal salt, which leads to an increase in the particle size during recrystallization. Therefore, in order to achieve the object of the present invention to obtain fine particles, it is desirable to keep the temperature of the reaction at 30 ° C. or lower.
- Step c) Step of removing water from the phosphonic acid metal salt of the precipitate obtained in step b)
- This step is not particularly limited, but preferably (i) substitution of water as a reaction medium with an organic solvent, or ( ii) Carried out by vacuum drying.
- the organic solvent used in the above (i) is not particularly limited, but is preferably a water-soluble organic solvent in order to efficiently remove water, and further, an organic solvent having a boiling point lower than about 120 ° C. for ease of drying.
- a solvent is preferred.
- organic solvents include methanol, ethanol, acetone, 1-propanol, 2-propanol, tert-butanol, 1,2-dimethoxyethane, tetrahydrofuran, 1,4-dioxane, acetonitrile, and the like. Ethanol or acetone is preferred.
- the above (i) is a method of once filtering the reaction liquid (suspension) in which the phosphonic acid metal salt has been deposited in the previous step, redispersing the filtrate in the organic solvent, and refiltering it. To do. It is preferable to replace water with an organic solvent as much as possible by repeating redispersion and refiltration in the organic solvent. Further, it may be once washed with water before being redispersed in an organic solvent.
- the temperature during drying under reduced pressure is preferably a low temperature so as not to affect the particle size of the phosphonic acid metal salt fine particles.
- the pressure for drying under reduced pressure is not particularly limited as long as it can be dried at the above-mentioned temperature.
- the drying is performed under reduced pressure at 1 to 5 kPa for 12 to 60 hours.
- step c) Step of heating and drying the phosphonic acid metal salt from which water has been obtained in step c) After removing water from the phosphonic acid metal salt in step c), the final phosphonate metal salt is obtained by heating and drying. Salt fine particles are obtained.
- the heating temperature at this time is preferably 100 to 300 ° C. If the temperature is higher than 300 ° C, decomposition of the phosphonic acid metal salt may be induced. If the temperature is lower than 100 ° C, hydrates of the phosphonic acid metal salt (for example, zinc phenylphosphonate and phenylphosphonic acid described later) may be used. Calcium is a monohydrate) and is not preferable because it is not suitable as a crystal nucleating agent for resins that dislike hydrolysis (for example, polyester resins).
- the average particle diameter (average particle diameter) of the phosphonic acid metal salt fine particles of the present invention obtained through the above-mentioned steps is 0.05 to 0.5 ⁇ m, preferably 0.05 to 0.3 ⁇ m.
- the phosphonic acid metal salt fine particles of the present invention may have a granular or disk shape (see FIGS. 1 to 7 described later), or a strip shape (strip shape, FIG. 11 to FIG. 13).
- the above “average particle diameter” means the average of the lengths of approximately the maximum minor axis (short axis) of the strip-like particles in the present invention.
- the size of the strip-like particle itself is described by length (major axis), width (minor axis), and thickness, and these numerical values satisfy the condition of ⁇ major axis ⁇ minor axis ⁇ thickness>.
- the present invention provides a polylactic acid resin composition containing 0.01 to 10 parts by mass of the phosphonic acid metal salt fine particles having an average particle diameter of 0.05 to 0.5 ⁇ m, based on 100 parts by mass of the polylactic acid resin. Also related.
- Example 1 A 15 mass% phenylphosphonic acid aqueous solution (phenylphosphonic acid 7.9 g, water 44.8 g) and a 15 mass% sodium hydroxide aqueous solution (sodium hydroxide 4.0 g, water 22.7 g) were mixed to obtain a pH of 8.8.
- the solution prepared as above was dropped into a 6 mass% aqueous zinc chloride solution (zinc chloride 6.8 g, water 100.0 g, pH 5.6) with stirring to precipitate zinc phenylphosphonate.
- the pH of the suspension at this time was 8.8.
- the obtained filtrate (wet product) was redispersed in 300 mL of water and filtered again, and this was repeated twice.
- Example 2 A 15 mass% phenylphosphonic acid aqueous solution (phenylphosphonic acid 7.2 g, water 40.8 g) and a 15 mass% sodium hydroxide aqueous solution (sodium hydroxide 3.7 g, water 20.7 g) were mixed to obtain a pH of 8.8.
- the solution prepared as above was dropped into an 8% by mass aqueous zinc acetate solution (zinc acetate dihydrate 10.0 g, water 90.0 g, pH 6.1) with stirring to precipitate zinc phenylphosphonate.
- the pH of the suspension at this time was 6.2.
- Example 3 A 15 mass% phenylphosphonic acid aqueous solution (phenylphosphonic acid 7.9 g, water 44.8 g) and a 15 mass% sodium hydroxide aqueous solution (sodium hydroxide 4.0 g, water 22.7 g) were mixed to obtain a pH of 8.8.
- the solution prepared as above was dropped into a 6 mass% aqueous zinc chloride solution (zinc chloride 6.8 g, water 100.0 g, pH 5.6) with stirring to precipitate zinc phenylphosphonate.
- the pH of the suspension at this time was 8.8.
- the obtained filtrate was redispersed in 300 mL of water and filtered again, and this was repeated twice.
- Example 4 A 15 mass% phenylphosphonic acid aqueous solution (phenylphosphonic acid 7.2 g, water 40.8 g) and a 15 mass% sodium hydroxide aqueous solution (sodium hydroxide 3.7 g, water 20.7 g) were mixed to obtain a pH of 8.8.
- the solution prepared as above was dropped into a 7 mass% aqueous zinc chloride solution (6.3 g of zinc chloride, 90.0 g of water, pH 5.6) with stirring to precipitate zinc phenylphosphonate.
- the pH of the suspension at this time was 8.8.
- the obtained filtrate (wet product) was redispersed in 300 mL of water and filtered again, and this was repeated twice.
- Example 5 A 15 mass% phenylphosphonic acid aqueous solution (phenylphosphonic acid 7.2 g, water 40.8 g) and a 15 mass% sodium hydroxide aqueous solution (sodium hydroxide 3.7 g, water 20.7 g) were mixed to obtain a pH of 8.8.
- the solution prepared as above was dropped into a 6 mass% aqueous zinc chloride solution (6.3 g of zinc chloride, 100.0 g of water, pH 5.6) with stirring to precipitate zinc phenylphosphonate.
- the pH of the suspension at this time was 8.8.
- the obtained filtrate (wet product) was redispersed in 300 mL of water and filtered again, and this was repeated twice.
- Example 6 The same operation as in Example 5 was performed except that the temperature of the vacuum drying was changed to 50 ° C.
- the SEM image of the obtained dry product (powder) is shown in FIG.
- Example 7 The same operation as in Example 5 was performed except that the temperature of the vacuum drying was changed to 60 ° C.
- the SEM image of the obtained dry product (powder) is shown in FIG.
- Example 1 to 7 and Comparative Examples 1 to 3 the reaction liquid 30 minutes after the precipitation of zinc phenylphosphonate (Comparative Example 3 after neutralization with an aqueous sodium hydroxide solution) was recovered. Then, the average particle diameter of zinc phenylphosphonate in the reaction solution was measured. The average particle size is measured by measuring the particle size every minute under the conditions of 1,500 rpm and ultrasonic level: 100 in the apparatus after being put into a laser diffraction type particle size distribution measuring machine ("MasterSizer 2000" manufactured by Malvern). The minimum value was adopted. The average particle diameter here refers to the d50 value (median diameter) of the particles in the dispersion medium derived by Mie's theory.
- the zinc phenylphosphonate prepared according to the procedures of Examples 1 to 7 was able to obtain fine particles having an average particle size of 0.14 to 0.24 ⁇ m even after drying.
- Comparative Example 1 in which only the washing solvent was water and the organic solvent substitution was not performed was in the form of fine particles when zinc phenylphosphonate was deposited, but the result was that the particles grew to 0.54 ⁇ m after drying.
- Example 8 and Comparative Example 4 Evaluation of crystallization temperature and crystallization time
- Zinc phenyl phosphonate (dry product) obtained in Example 4 above or manufactured by Nissan Chemical Industries, Ltd. with respect to 100 parts by mass of polylactic acid resin (Mitsui Chemicals, trade name: LACEEA-H100) 1 part by mass of zinc phenylphosphonate (trade name: Eco Promote, average particle size: 2 to 3 ⁇ m) was added, and melt-kneaded at 185 ° C. for 5 minutes using a lab plast mill manufactured by Toyo Seiki Seisakusho.
- Crystallization temperature About 5 mg of a sample was heated to 200 ° C. at 10 ° C./min, held for 5 minutes and melted, and then cooled to 30 ° C. at 5 ° C./min. The temperature at which the exotherm due to crystallization of the polylactic acid resin generated during cooling reached a peak was taken as the crystallization temperature.
- Crystallization time About 5 mg of the sample was heated to 200 ° C.
- the zinc phenylphosphonate obtained in Example 4 was higher in crystallization temperature than the zinc phenylphosphonate product (Eco Promote), and the induction time during isothermal crystallization was short, and the present phosphonic acid It was confirmed that the metal salt fine particles showed excellent performance as a crystal nucleating agent.
- Example 9 A 15 mass% phenylphosphonic acid aqueous solution (phenylphosphonic acid 7.9 g, water 44.8 g) and a 15 mass% sodium hydroxide aqueous solution (sodium hydroxide 4.0 g, water 22.7 g) were mixed to obtain a pH of 8.7.
- the solution prepared above was dropped into an 8% by mass aqueous calcium chloride solution (calcium chloride dihydrate 7.4 g, water 66.2 g) with stirring to precipitate calcium phenylphosphonate.
- the pH of the suspension at this time was 7.1.
- the obtained filtrate (wet product) was redispersed in 100 mL of water and filtered again, and this was repeated twice.
- Example 10 A 15 mass% phenylphosphonic acid aqueous solution (phenylphosphonic acid 7.9 g, water 44.9 g) and a 15 mass% sodium hydroxide aqueous solution (sodium hydroxide 4.0 g, water 22.7 g) were mixed to obtain a pH of 9.4.
- the solution prepared above was dropped into a 9% by mass aqueous calcium acetate solution (calcium acetate monohydrate 8.8 g, water 79.3 g) with stirring to precipitate calcium phenylphosphonate.
- the pH of the suspension at this time was 8.6.
- the obtained filtrate (wet product) was redispersed in 100 mL of water and filtered again, and this was repeated twice.
- Example 11 A 15 mass% phenylphosphonic acid aqueous solution (phenylphosphonic acid 7.9 g, water 44.9 g) and a 15 mass% sodium hydroxide aqueous solution (sodium hydroxide 4.2 g, water 23.8 g) were mixed to obtain a pH of 12.4.
- the solution prepared above was dropped into an 8% by mass aqueous calcium chloride solution (calcium chloride dihydrate 7.4 g, water 66.2 g) with stirring to precipitate calcium phenylphosphonate.
- the pH of the suspension at this time was 11.5.
- the obtained filtrate (wet product) was redispersed in 100 mL of water and filtered again, and this was repeated twice.
- Example 9 to 11 and Comparative Examples 5 to 8 the average particle diameters of the obtained calcium phenylphosphonate (dry product) powder particles were measured.
- the average particle size here means the average length of the short axis direction of the particle, and the average of the maximum length in the short axis direction of 50 particles randomly extracted from the SEM image of the dry product is obtained. It was. The obtained results are shown in Table 3.
- the average particle size of calcium phenylphosphonate prepared by the procedures of Examples 9 to 11 was 0.28 to 0.32 ⁇ m.
- Comparative Example 5 in which calcium phosphonate precipitated in the same reaction conditions as in Example 10 was used with only water as the washing solvent and no organic solvent substitution was performed, the average particle size became 0.59 ⁇ m, and the particles grew during drying. As a result.
- Comparative Example 6 in which a base was used after salt precipitation, and Comparative Example 7 and Comparative Example 8 in which the base was not used, had a particle size exceeding 0.5 ⁇ m even when the washing solvent water was replaced with an organic solvent.
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Abstract
Description
ポリ乳酸樹脂の成形加工性や耐熱性を改善するにあたり、該樹脂の結晶化速度及び結晶化度を高める試みがなされており、その方法の一つとして結晶核剤の添加が提案されている。結晶核剤とは、結晶性高分子の一次結晶核となり結晶成長を促進し、結晶サイズを微細化すると共に、結晶化速度を高める働きをする。ポリ乳酸樹脂の結晶核剤としては、特定の粒径以下のタルク/又は窒化ホウ素からなる無機粒子(特許文献1)、特定の式で表されるアミド化合物(特許文献2)、特定の式で表されるソルビトール系誘導体(特許文献3)、特定の式で表されるリン酸エステル金属塩(特許文献4)、或いはホスホン酸金属塩(特許文献5及び特許文献6)などが開示されている。
上記結晶核剤の中でも優れた性能を有するとされているホスホン酸金属塩は、通常、水又は有機溶媒中で、ホスホン酸系化合物と金属イオン源、例えば金属水酸化物、金属酸化物や金属硝酸塩、金属酢酸塩などとを反応させることにより製造される。
例えば、特許文献5に記載のホスホン酸金属塩においては、平均粒子径を10μm以下にするために必要に応じて粉砕処理等を実施する旨記載されている。また同文献には、実施例において最小1.1μmの平均粒子径を有するホスホン酸金属塩が製造された旨記載されている。
従って、本発明はさらに粒径の小さな粒子、例えば0.5μm以下の粒子を粉砕処理等の操作を必要とすることなく、より効率的に製造できる新たな製造方法を提案することを課題とする。
b)工程a)で得られた生成物を金属塩と反応させてホスホン酸金属塩を水性媒体より析出させる工程、
c)工程b)で得られた析出物のホスホン酸金属塩から水を除去する工程、及び
d)工程c)で得られた水を除去した前記ホスホン酸金属塩を加熱乾燥させる工程を含む、ホスホン酸金属塩微粒子の製造方法に関する。
第2観点として、前記ホスホン酸金属塩が、リチウム塩、ナトリウム塩、カリウム塩、マグネシウム塩、カルシウム塩、バリウム塩、鉄塩、コバルト塩、銅塩、マンガン塩及び亜鉛塩からなる群から選択される1種または2種以上の金属塩である、第1観点に記載のホスホン酸金属塩微粒子の製造方法に関する。
第3観点として、a)反応系を中性乃至塩基性のpH域となるように調整する工程において、反応系をpH7乃至14に調整する、第1観点又は第2観点記載のホスホン酸金属塩微粒子の製造方法に関する。
第4観点として、b)ホスホン酸金属塩を水性媒体より析出させる工程が、工程a)で得られた生成物を金属塩の水溶液に滴下することによって行われる、第1観点乃至第3観点のうち何れか一項に記載のホスホン酸金属塩微粒子の製造方法に関する。
第5観点として、c)析出物のホスホン酸金属塩から水を除去する工程が、反応媒体である水を有機溶媒と置換することによって行われる、第1観点乃至第4観点のうち何れか一項に記載のホスホン酸金属塩微粒子の製造方法に関する。
第6観点として、前記有機溶媒が沸点120℃以下の水溶性の有機溶媒である、第5観点に記載のホスホン酸金属塩微粒子の製造方法に関する。
第7観点として、前記有機溶媒がメタノール、エタノール、又はアセトンである、第6観点に記載のホスホン酸金属塩微粒子の製造方法に関する。
第8観点として、c)析出物のホスホン酸金属塩から水を除去する工程が、5乃至70℃における減圧乾燥によって行われる、第1観点乃至第7観点のうち何れか一項に記載のホスホン酸金属塩微粒子の製造方法に関する。
第9観点として、平均粒径が0.01乃至0.5μmである、第1観点乃至第8観点のうち何れか一項に記載の製造方法により得られるホスホン酸金属塩微粒子に関する。
第10観点として、ポリ乳酸樹脂100質量部に対し、第9観点に記載のホスホン酸金属塩微粒子0.01乃至10質量部を含有するポリ乳酸樹脂組成物に関する。
このように、本発明の製造方法は、さらなる粉砕等の工程を必要とすることなく、従来の製造方法よりも微細な平均粒径を有するホスホン酸金属塩微粒子を製造できる。
また、ホスホン酸金属塩を水性媒体より析出させた後、加熱乾燥時に反応媒体である水が多量に残存していると、ホスホン酸金属塩の残存水への溶解が起こり、前記同様に金属塩の再結晶との平衡反応による粒子サイズの増大が起きる。
以下、本発明についてさらに詳しく説明する。
本発明で使用するホスホン酸化合物は、下記一般式(I)で表される化合物である。
上記ホスホン酸化合物と反応させる塩基としては特に限定されないが、例えば水酸化ナトリウム、炭酸ナトリウム、炭酸水素ナトリウム等を使用することができる。
本工程は、具体的には例えばこれらの塩基の水溶液を上記式(I)で表されるホスホン酸化合物の水溶液と混合することによって実施される。
本工程において、金属塩を前記a)工程で得られた生成物(ホスホン酸化合物含有溶液)と反応させるには、例えば上記金属塩を含む水溶液と前記生成物を混合させることによって行われる。好ましくは、上記金属塩を含む水溶液に、前記生成物を滴下することによって反応させる。
塩の形態としては水溶性であれば特に限定されず、硫酸塩、硝酸塩、塩化物、炭酸塩、酢酸塩等を使用でき、好ましくは塩化物又は酢酸塩が挙げられる。
ここで使用される金属としては、1価、2価及び3価の金属を使用することが出来る。該金属においてこれらの金属は、2種以上の金属を混合して使用することもできる。金属塩の具体例としては、リチウム塩、ナトリウム塩、カリウム塩、マグネシウム塩、アルミニウム塩、カルシウム塩、バリウム塩、マンガン塩、鉄塩、コバルト塩、ニッケル塩、銅塩、亜鉛塩等が挙げられる。中でも、リチウム塩、ナトリウム塩、カリウム塩、マグネシウム塩、カルシウム塩、バリウム塩、鉄塩、コバルト塩、銅塩、マンガン塩及び亜鉛塩が好ましく、特に亜鉛塩であることが好ましい。
本工程は特に限定されないが、好ましくは(i)反応媒体である水の有機溶媒への置換、或いは、(ii)減圧乾燥によって実施される。
このような有機溶媒としては、メタノール、エタノール、アセトン、1-プロパノール、2-プロパノール、tert-ブタノール、1,2-ジメトキシエタン、テトラヒドロフラン、1,4-ジオキサン又はアセトニトリル等が挙げられ、中でも、メタノール、エタノール又はアセトンが好ましい。
また、有機溶媒に再分散させる前に、一旦水で数回洗浄してもよい。
また減圧乾燥の圧力は、上記温度で乾燥ができる圧力であれば特に制限はないが、例えば1乃至5kPa下で、12乃至60時間かけて減圧乾燥させる。
前記c)工程でホスホン酸金属塩から水を除去した後、加熱乾燥によって最終目的物であるホスホン酸金属塩微粒子を得る。
このときの加熱温度としては、100乃至300℃であることが好ましい。300℃より高い温度では、ホスホン酸金属塩の分解を誘発する虞があり、また、100℃より低い温度では、ホスホン酸金属塩の水和物(例えば、後述のフェニルホスホン酸亜鉛やフェニルホスホン酸カルシウムでは一水和物)の形態をとり、加水分解を嫌う樹脂(例えばポリエステル樹脂等)の結晶核剤としては適さないことから好ましくない。
なお、本発明のホスホン酸金属塩微粒子は、例えば金属塩の種類によって、その形状が粒状や円盤状(後述の図1~図7参照)であり得、或いは、短冊状(ストリップ状、同図11~図13参照)であり得る。こうした短冊状粒子の場合、上記「平均粒径」とは、本発明においては該短冊状粒子のおよそ最大の短径(短軸)の長さの平均を意味するものとする。なお短冊状粒子の大きさそのものは、長さ(長径)、幅(短径)及び厚さより記述され、これら数値は〈長径≧短径≧厚さ〉の条件を満たすものとする。
15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.9g、水 44.8g)と15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 4.0g、水 22.7g)とを混合してpH 8.8に調整した溶液を、6質量%塩化亜鉛水溶液(塩化亜鉛 6.8g、水 100.0g、pH 5.6)に撹拌下で滴下し、フェニルホスホン酸亜鉛を析出させた。このときの懸濁液のpHは8.8であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 300mLに再分散させ再度濾過し、これを2回繰り返した。その後、ろ物(湿品)をメタノール 300mLに再分散させ再度濾過し、これを2回繰り返した。最後に20℃での減圧乾燥にてメタノールを留去し、120℃で6時間乾燥をおこなった。
得られた乾品(粉末)のSEM(走査型顕微鏡)像を図1に示す。
15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.2g、水 40.8g)と15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 3.7g、水 20.7g)とを混合してpH 8.8に調整した溶液を、8質量%酢酸亜鉛水溶液(酢酸亜鉛二水和物 10.0g、水 90.0g、pH 6.1)に撹拌下で滴下し、フェニルホスホン酸亜鉛を析出させた。このときの懸濁液のpHは6.2であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 300mLに再分散させ再度濾過し、これを2回繰り返した。その後、ろ物(湿品)をアセトン 300mLに再分散させ再度濾過し、これを2回繰り返した。最後に20℃での減圧乾燥にてアセトンを留去し、120℃で6時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図2に示す。
15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.9g、水 44.8g)と15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 4.0g、水 22.7g)とを混合してpH 8.8に調整した溶液を、6質量%塩化亜鉛水溶液(塩化亜鉛 6.8g、水 100.0g、pH 5.6)に撹拌下で滴下し、フェニルホスホン酸亜鉛を析出させた。このときの懸濁液のpHは8.8であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 300mLに再分散させ再度濾過し、これを2回繰り返した。その後、ろ物(湿品)をエタノール 300mLに再分散させ再度濾過し、これを2回繰り返した。最後に20℃での減圧乾燥にてエタノールを留去し、120℃で6時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図3に示す。
15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.2g、水 40.8g)と15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 3.7g、水 20.7g)とを混合してpH 8.8に調整した溶液を、7質量%塩化亜鉛水溶液(塩化亜鉛 6.3g、水 90.0g、pH 5.6)に撹拌下で滴下し、フェニルホスホン酸亜鉛を析出させた。このときの懸濁液のpHは8.8であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 300mLに再分散させ再度濾過し、これを2回繰り返した。その後、ろ物(湿品)をアセトン 300mLに再分散させ再度濾過し、これを2回繰り返した。最後に20℃での減圧乾燥にてアセトンを留去し、120℃で6時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図4に示す。
15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.2g、水 40.8g)と15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 3.7g、水 20.7g)とを混合してpH 8.8に調整した溶液を、6質量%塩化亜鉛水溶液(塩化亜鉛 6.3g、水 100.0g、pH 5.6)に撹拌下で滴下し、フェニルホスホン酸亜鉛を析出させた。このときの懸濁液のpHは8.8であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 300mLに再分散させ再度濾過し、これを2回繰り返した。その後、40℃、12時間の減圧乾燥により水を留去してから、120℃で6時間乾燥をおこなった。なお、減圧乾燥の終点は、乾品の熱重量分析((株)リガク製 Thermo Plus、昇温速度:10℃/分)を行い、水分の蒸発による重量減少が結晶水相当になっていることで確認した。
得られた乾品(粉末)のSEM像を図5に示す。
減圧乾燥の温度を50℃に変更した以外は、実施例5と同様の操作を行った。
得られた乾品(粉末)のSEM像を図6に示す。
減圧乾燥の温度を60℃に変更した以外は、実施例5と同様の操作を行った。
得られた乾品(粉末)のSEM像を図7に示す。
15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.2g、水 40.8g)と15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 3.7g、水 20.7g)とを混合してpH 8.8に調整した溶液を、8質量%酢酸亜鉛水溶液(酢酸亜鉛二水和物 10.0g、水 90.0g、pH 6.1)に撹拌下で滴下し、フェニルホスホン酸亜鉛を析出させた。このときの懸濁液のpHは6.3であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水300mLに再分散させ再度濾過し、これを2回繰り返した。その後、120℃で12時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図8に示す。
8質量%酢酸亜鉛水溶液(酢酸亜鉛二水和物 10.0g、水 90.0g、pH 6.3)に15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.2g、水 40.8g、pH 0.5)を撹拌下で滴下し、フェニルホスホン酸亜鉛を析出させた。このときの懸濁液のpHは3.1であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 300mLに再分散させ再度濾過し、これを2回繰り返した。その後、ろ物(湿品)をアセトン 300mLに再分散させ再度濾過し、これを2回繰り返した。最後に20℃での減圧乾燥にてアセトンを留去し、120℃で12時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図9に示す。
8質量%酢酸亜鉛水溶液(酢酸亜鉛二水和物 10.0g、水 90.0g、pH 6.3)に15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.2g、水 40.8g、pH 0.5)を撹拌下で滴下し、フェニルホスホン酸亜鉛を析出させた。このときの懸濁液のpHは2.8であった。その後15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 3.7g、水 20.7g)を撹拌下で滴下し、pH 6.8に調整した。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水300mLに再分散させ再度濾過し、れを2回繰り返した。その後、ろ物(湿品)をアセトン300mLに再分散させ再度濾過し、これを2回繰り返した。最後に20℃での減圧乾燥にてアセトンを留去し、120℃で12時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図10に示す。
また、乾燥後のフェニルホスホン酸亜鉛の粉末粒子の平均粒径については、乾品のSEM(走査型顕微鏡)像より50個の粒子を無作為抽出し、粒子長軸方向の長さの平均を求めた。得られた結果を表1に示す。
一方、洗浄溶媒を水のみとし、有機溶媒置換を行わなかった比較例1は、フェニルホスホン酸亜鉛析出時には微粒子の形態であったが、乾燥後には0.54μmと粒子が成長する結果となった。
さらに、塩基未使用の比較例2及び塩析出後に塩基を使用した比較例3は、反応液中で粒径が大きく成長し、乾燥後も0.5μmを超える粒径となった。
ポリ乳酸樹脂(三井化学(株)製、商品名:LACEA-H100)100質量部に対して、上記実施例4で得られたフェニルホスホン酸亜鉛(乾品)、又は日産化学工業(株)製フェニルホスホン酸亜鉛(商品名:エコプロモート、平均粒径:2~3μm)を1質量部加え、(株)東洋精機製作所製ラボプラストミルを用いて、185℃にて5分間溶融混練した。
その後、夫々の試料について、パーキンエルマー社製 示差走査熱量測定(DSC)装置「Diamond DSC」を用い、以下の手順にて結晶化温度及び結晶化時間を評価した。得られた結果を表2に示す。
1)結晶化温度:試料約5mgを10℃/分で200℃まで昇温後、5分間保持し溶融させた後、5℃/分で30℃まで冷却した。冷却中に生じたポリ乳酸樹脂の結晶化による発熱がピークに達した温度を結晶化温度とした。
2)結晶化時間:試料約5mgを10℃/分で200℃まで昇温後、5分間保持し溶融させた後、100℃/分で110℃まで急速冷却し、保持した。その後生ずるポリ乳酸樹脂の結晶化による発熱がピークに達した時間を結晶化時間とした。
15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.9g、水 44.8g)と15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 4.0g、水 22.7g)とを混合してpH 8.7に調整した溶液を、8質量%塩化カルシウム水溶液(塩化カルシウム二水和物 7.4g、水 66.2g)に撹拌下で滴下し、フェニルホスホン酸カルシウムを析出させた。このときの懸濁液のpHは7.1であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 100mLに再分散させ再度濾過し、これを2回繰り返した。その後、ろ物(湿品)をアセトン 100mLに再分散させ再度濾過し、これを2回繰り返した。最後に20℃での減圧乾燥にてアセトンを留去し、200℃で12時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図11に示す。
15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.9g、水 44.9g)と15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 4.0g、水 22.7g)とを混合してpH 9.4に調整した溶液を、9質量%酢酸カルシウム水溶液(酢酸カルシウム一水和物 8.8g、水 79.3g)に撹拌下で滴下し、フェニルホスホン酸カルシウムを析出させた。このときの懸濁液のpHは8.6であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 100mLに再分散させ再度濾過し、これを2回繰り返した。その後、ろ物(湿品)をアセトン 100mLに再分散させ再度濾過し、これを2回繰り返した。最後に20℃での減圧乾燥にてアセトンを留去し、200℃で12時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図12に示す。
15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.9g、水 44.9g)と15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 4.2g、水 23.8g)とを混合してpH 12.4に調整した溶液を、8質量%塩化カルシウム水溶液(塩化カルシウム二水和物 7.4g、水 66.2g)に撹拌下で滴下し、フェニルホスホン酸カルシウムを析出させた。このときの懸濁液のpHは11.5であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 100mLに再分散させ再度濾過し、これを2回繰り返した。その後、40℃、12時間の減圧乾燥により水を留去してから、200℃で12時間乾燥をおこなった。なお、減圧乾燥の終点は、乾品の熱重量分析((株)リガク製 Thermo Plus、昇温速度:10℃/分)を行い、水分の蒸発による重量減少が結晶水相当になっていることで確認した。
得られた乾品(粉末)のSEM像を図13に示す。
15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.9g、水 44.9g)と15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 4.0g、水 22.7g)とを混合してpH9.4に調整した溶液を、9質量%酢酸カルシウム水溶液(酢酸カルシウム一水和物 8.8g、水 79.3g)に撹拌下で滴下し、フェニルホスホン酸カルシウムを析出させた。このときの懸濁液のpHは8.6であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水100mLに再分散させ再度濾過し、これを2回繰り返した。その後、200℃で12時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図14に示す。
8質量%塩化カルシウム水溶液(塩化カルシウム二水和物 7.4g、水 66.2g、pH 7.0)に、15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.9g、水 44.8g、pH 0.5)を撹拌下で滴下し、フェニルホスホン酸カルシウムを析出させた。このときの懸濁液のpHは1.0であった。その後、この縣濁液に15質量%水酸化ナトリウム水溶液(水酸化ナトリウム 4.0g、水 22.7g)を撹拌下で滴下し、pH12.0に調整した。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 100mLに再分散させ再度濾過し、これを2回繰り返した。その後、ろ物(湿品)をアセトン 100mLに再分散させ再度濾過し、これを2回繰り返した。最後に20℃での減圧乾燥にてアセトンを留去し、200℃で12時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図15に示す。
9質量%酢酸カルシウム水溶液(酢酸カルシウム一水和物 8.8g、水 79.3g、pH 7.9)に、15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.9g、水 44.9g、pH 0.5)を撹拌下で滴下し、フェニルホスホン酸カルシウムを析出させた。このときの懸濁液のpHは4.4であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 100mLに再分散させ再度濾過し、これを2回繰り返した。その後、ろ物(湿品)をアセトン 100mLに再分散させ再度濾過し、これを2回繰り返した。最後に20℃での減圧乾燥にてアセトンを留去し、200℃で12時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図16に示す。
8質量%塩化カルシウム水溶液(塩化カルシウム二水和物 7.4g、水 66.2g、pH 7.0)に、15質量%フェニルホスホン酸水溶液(フェニルホスホン酸 7.9g、水 44.9g、pH 0.5)を撹拌下で滴下し、フェニルホスホン酸カルシウムを析出させた。このときの懸濁液のpHは0.7であった。
得られた縣濁液を濾過した後、得られたろ物(湿品)を水 100mLに再分散させ再度濾過し、これを2回繰り返した。その後、ろ物(湿品)をアセトン 100mLに再分散させ再度濾過し、これを2回繰り返した。最後に20℃での減圧乾燥にてアセトンを留去し、200℃で12時間乾燥をおこなった。
得られた乾品(粉末)のSEM像を図17に示す。
一方、実施例10と同じ反応条件で析出させたフェニルホスホン酸カルシウムを、洗浄溶媒を水のみとし有機溶媒置換を行わなかった比較例5は、平均粒径が0.59μmとなり乾燥時に粒子が成長する結果となった。
さらに、塩析出後に塩基を使用した比較例6並びに、塩基未使用の比較例7及び比較例8は、洗浄溶媒の水を有機溶媒置換していても0.5μmを超える粒径となった。
Claims (10)
- 前記ホスホン酸金属塩が、リチウム塩、ナトリウム塩、カリウム塩、マグネシウム塩、カルシウム塩、バリウム塩、鉄塩、コバルト塩、銅塩、マンガン塩及び亜鉛塩からなる群から選択される1種または2種以上の金属塩である、請求項1に記載のホスホン酸金属塩微粒子の製造方法。
- a)反応系を中性乃至塩基性のpH域となるように調整する工程において、反応系をpH7乃至14に調整する、請求項1又は請求項2記載のホスホン酸金属塩微粒子の製造方法。
- b)ホスホン酸金属塩を水性媒体より析出させる工程が、工程a)で得られた生成物を金属塩の水溶液に滴下することによって行われる、請求項1乃至請求項3のうち何れか一項に記載のホスホン酸金属塩微粒子の製造方法。
- c)析出物のホスホン酸金属塩から水を除去する工程が、反応媒体である水を有機溶媒と置換することによって行われる、請求項1乃至請求項4のうち何れか一項に記載のホスホン酸金属塩微粒子の製造方法。
- 前記有機溶媒が沸点120℃以下の水溶性の有機溶媒である、請求項5に記載のホスホン酸金属塩微粒子の製造方法。
- 前記有機溶媒がメタノール、エタノール、又はアセトンである、請求項6に記載のホスホン酸金属塩微粒子の製造方法。
- c)析出物のホスホン酸金属塩から水を除去する工程が、5乃至70℃における減圧乾燥によって行われる、請求項1乃至請求項7のうち何れか一項に記載のホスホン酸金属塩微粒子の製造方法。
- 平均粒径が0.01乃至0.5μmである、請求項1乃至請求項8のうち何れか一項に記載の製造方法により得られるホスホン酸金属塩微粒子。
- ポリ乳酸樹脂100質量部に対し、請求項9に記載のホスホン酸金属塩微粒子0.01乃至10質量部を含有するポリ乳酸樹脂組成物。
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US20120046397A1 (en) | 2012-02-23 |
EP2431374B1 (en) | 2016-03-30 |
JP5720896B2 (ja) | 2015-05-20 |
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