JP2023060954A - Fertilizer particle - Google Patents
Fertilizer particle Download PDFInfo
- Publication number
- JP2023060954A JP2023060954A JP2021170654A JP2021170654A JP2023060954A JP 2023060954 A JP2023060954 A JP 2023060954A JP 2021170654 A JP2021170654 A JP 2021170654A JP 2021170654 A JP2021170654 A JP 2021170654A JP 2023060954 A JP2023060954 A JP 2023060954A
- Authority
- JP
- Japan
- Prior art keywords
- resin composition
- fertilizer particles
- resin
- fertilizer
- mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003337 fertilizer Substances 0.000 title claims abstract description 90
- 239000002245 particle Substances 0.000 title claims abstract description 78
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 71
- 239000011342 resin composition Substances 0.000 claims abstract description 58
- 229920006167 biodegradable resin Polymers 0.000 claims abstract description 48
- 239000000126 substance Substances 0.000 claims abstract description 47
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 35
- -1 polybutylene adipate terephthalate Polymers 0.000 claims abstract description 27
- 239000010459 dolomite Substances 0.000 claims abstract description 26
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 26
- 239000004629 polybutylene adipate terephthalate Substances 0.000 claims abstract description 19
- 229920002301 cellulose acetate Polymers 0.000 claims description 17
- 229920005989 resin Polymers 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 16
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 11
- 239000004626 polylactic acid Substances 0.000 claims description 11
- QZCLKYGREBVARF-UHFFFAOYSA-N Acetyl tributyl citrate Chemical compound CCCCOC(=O)CC(C(=O)OCCCC)(OC(C)=O)CC(=O)OCCCC QZCLKYGREBVARF-UHFFFAOYSA-N 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 239000002023 wood Substances 0.000 claims description 7
- 230000021736 acetylation Effects 0.000 claims description 6
- 238000006640 acetylation reaction Methods 0.000 claims description 6
- 235000013312 flour Nutrition 0.000 claims description 6
- 239000010903 husk Substances 0.000 claims description 6
- 239000005416 organic matter Substances 0.000 claims description 5
- 235000013527 bean curd Nutrition 0.000 claims description 3
- 229940100486 rice starch Drugs 0.000 claims description 3
- 238000010828 elution Methods 0.000 abstract description 33
- 229920001896 polybutyrate Polymers 0.000 description 17
- 238000003860 storage Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000000843 powder Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 235000013877 carbamide Nutrition 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 5
- 239000004014 plasticizer Substances 0.000 description 5
- 238000004381 surface treatment Methods 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 239000004202 carbamide Substances 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920002284 Cellulose triacetate Polymers 0.000 description 3
- 241000209094 Oryza Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 3
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 3
- 235000009566 rice Nutrition 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 239000000454 talc Substances 0.000 description 3
- 229910052623 talc Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 235000015099 wheat brans Nutrition 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- 241000218691 Cupressaceae Species 0.000 description 2
- NIQCNGHVCWTJSM-UHFFFAOYSA-N Dimethyl phthalate Chemical compound COC(=O)C1=CC=CC=C1C(=O)OC NIQCNGHVCWTJSM-UHFFFAOYSA-N 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 238000004737 colorimetric analysis Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 238000007922 dissolution test Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000004720 fertilization Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 description 2
- 239000004137 magnesium phosphate Substances 0.000 description 2
- 229910000157 magnesium phosphate Inorganic materials 0.000 description 2
- 229960002261 magnesium phosphate Drugs 0.000 description 2
- 235000010994 magnesium phosphates Nutrition 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229950011008 tetrachloroethylene Drugs 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920001747 Cellulose diacetate Polymers 0.000 description 1
- 240000005109 Cryptomeria japonica Species 0.000 description 1
- 239000005955 Ferric phosphate Substances 0.000 description 1
- 239000004348 Glyceryl diacetate Substances 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- SQSPRWMERUQXNE-UHFFFAOYSA-N Guanylurea Chemical compound NC(=N)NC(N)=O SQSPRWMERUQXNE-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229920000426 Microplastic Polymers 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-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
- 229920000954 Polyglycolide Polymers 0.000 description 1
- 229920000331 Polyhydroxybutyrate Polymers 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- DOOTYTYQINUNNV-UHFFFAOYSA-N Triethyl citrate Chemical compound CCOC(=O)CC(O)(C(=O)OCC)CC(=O)OCC DOOTYTYQINUNNV-UHFFFAOYSA-N 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- ZGBSOTLWHZQNLH-UHFFFAOYSA-N [Mg].S(O)(O)(=O)=O Chemical compound [Mg].S(O)(O)(=O)=O ZGBSOTLWHZQNLH-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 150000003868 ammonium compounds Chemical class 0.000 description 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 231100000693 bioaccumulation Toxicity 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- MYFXBBAEXORJNB-UHFFFAOYSA-N calcium cyanamide Chemical compound [Ca+2].[N-]=C=[N-] MYFXBBAEXORJNB-UHFFFAOYSA-N 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- HHSPVTKDOHQBKF-UHFFFAOYSA-J calcium;magnesium;dicarbonate Chemical compound [Mg+2].[Ca+2].[O-]C([O-])=O.[O-]C([O-])=O HHSPVTKDOHQBKF-UHFFFAOYSA-J 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 229910000388 diammonium phosphate Inorganic materials 0.000 description 1
- 235000019838 diammonium phosphate Nutrition 0.000 description 1
- PCYQQSKDZQTOQG-NXEZZACHSA-N dibutyl (2r,3r)-2,3-dihydroxybutanedioate Chemical compound CCCCOC(=O)[C@H](O)[C@@H](O)C(=O)OCCCC PCYQQSKDZQTOQG-NXEZZACHSA-N 0.000 description 1
- FBSAITBEAPNWJG-UHFFFAOYSA-N dimethyl phthalate Natural products CC(=O)OC1=CC=CC=C1OC(C)=O FBSAITBEAPNWJG-UHFFFAOYSA-N 0.000 description 1
- 229960001826 dimethylphthalate Drugs 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229940032958 ferric phosphate Drugs 0.000 description 1
- 229940116007 ferrous phosphate Drugs 0.000 description 1
- 229960001781 ferrous sulfate Drugs 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 235000019443 glyceryl diacetate Nutrition 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910000155 iron(II) phosphate Inorganic materials 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- SDEKDNPYZOERBP-UHFFFAOYSA-H iron(ii) phosphate Chemical compound [Fe+2].[Fe+2].[Fe+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O SDEKDNPYZOERBP-UHFFFAOYSA-H 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 235000011147 magnesium chloride Nutrition 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000010299 mechanically pulverizing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920001020 poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) Polymers 0.000 description 1
- 239000005015 poly(hydroxybutyrate) Substances 0.000 description 1
- 229920002463 poly(p-dioxanone) polymer Polymers 0.000 description 1
- 239000004631 polybutylene succinate Substances 0.000 description 1
- 229920002961 polybutylene succinate Polymers 0.000 description 1
- 229920009537 polybutylene succinate adipate Polymers 0.000 description 1
- 239000004630 polybutylene succinate adipate Substances 0.000 description 1
- 229920001610 polycaprolactone Polymers 0.000 description 1
- 239000004632 polycaprolactone Substances 0.000 description 1
- 239000000622 polydioxanone Substances 0.000 description 1
- 239000004633 polyglycolic acid Substances 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 229920003124 powdered cellulose Polymers 0.000 description 1
- 235000019814 powdered cellulose Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229940032330 sulfuric acid Drugs 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- WEAPVABOECTMGR-UHFFFAOYSA-N triethyl 2-acetyloxypropane-1,2,3-tricarboxylate Chemical compound CCOC(=O)CC(C(=O)OCC)(OC(C)=O)CC(=O)OCC WEAPVABOECTMGR-UHFFFAOYSA-N 0.000 description 1
- 239000001069 triethyl citrate Substances 0.000 description 1
- VMYFZRTXGLUXMZ-UHFFFAOYSA-N triethyl citrate Natural products CCOC(=O)C(O)(C(=O)OCC)C(=O)OCC VMYFZRTXGLUXMZ-UHFFFAOYSA-N 0.000 description 1
- 235000013769 triethyl citrate Nutrition 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
Landscapes
- Fertilizers (AREA)
Abstract
Description
本発明は、肥料粒子に関する。 The present invention relates to fertilizer particles.
肥料成分の施肥方法として、樹脂等で被覆された肥料粒子の使用が知られる。このような肥料粒子によれば、肥料成分が長期にわたって徐放され、施肥の効率化を図ることができる。 As a method of applying fertilizer components, use of fertilizer particles coated with resin or the like is known. According to such fertilizer particles, fertilizer components are gradually released over a long period of time, and efficiency of fertilization can be improved.
しかし、このような肥料粒子から肥料成分が溶出した後は、樹脂等の被覆材が分解されずに、田畑や水域に蓄積してしまう可能性がある。このような蓄積は、環境汚染(海域等の汚染、マイクロプラスチックの生物濃縮等)の問題を引き起こし得る。 However, after the fertilizer component is eluted from such fertilizer particles, the coating material such as resin may not be decomposed and may accumulate in fields or water areas. Such accumulation can cause problems of environmental pollution (pollution of marine areas, bioaccumulation of microplastics, etc.).
上記の問題を解消する方法として、被覆材として生分解性樹脂を用いる方法が考えられる(例えば、特許文献1及び2)。 As a method for solving the above problems, a method using a biodegradable resin as a coating material is conceivable (for example, Patent Documents 1 and 2).
しかし、本発明者は、生分解性樹脂の使用によって環境汚染等の問題を低減できるものの、肥料成分の溶出制御性が損なわれ得ることを見出した。肥料成分の溶出制御性が低ければ、肥料成分の多くが短期間で溶出してしまい、施肥の効率化を図ることはできない。 However, the inventors of the present invention have found that the use of biodegradable resins can reduce problems such as environmental pollution, but the elution controllability of fertilizer components may be impaired. If the elution controllability of fertilizer components is low, most of the fertilizer components will be eluted in a short period of time, making it impossible to improve the efficiency of fertilization.
本発明は以上の実情に鑑みて完成されたものであり、肥料成分の溶出制御性が良好な、生分解性樹脂含有肥料粒子の提供を目的とする。 The present invention has been completed in view of the above circumstances, and an object of the present invention is to provide biodegradable resin-containing fertilizer particles with good elution controllability of fertilizer components.
本発明者は、肥料成分の被覆材に、少なくともポリブチレンアジペートテレフタレートを含む生分解性樹脂とともに、所定の無機物質を配合することで上記課題を解決できることを見出し、本発明を完成するに至った。より具体的には、本発明は以下を提供する。 The present inventors have found that the above problems can be solved by blending a predetermined inorganic substance with a biodegradable resin containing at least polybutylene adipate terephthalate in a fertilizer component coating material, and have completed the present invention. . More specifically, the present invention provides:
(1) 肥料成分が樹脂組成物に被覆された肥料粒子であって、
前記樹脂組成物が、生分解性樹脂及び無機物質を含み、
前記生分解性樹脂が、少なくともポリブチレンアジペートテレフタレートを含み、
前記生分解性樹脂と前記無機物質との質量比が、10:90~70:30であり、
前記無機物質が、炭酸カルシウム及び/又はドロマイトである、
肥料粒子。
(1) Fertilizer particles in which the fertilizer component is coated with a resin composition,
the resin composition comprises a biodegradable resin and an inorganic substance,
The biodegradable resin contains at least polybutylene adipate terephthalate,
The mass ratio of the biodegradable resin and the inorganic substance is 10:90 to 70:30,
wherein the inorganic substance is calcium carbonate and/or dolomite;
fertilizer particles.
(2) 前記樹脂組成物中の樹脂が、前記生分解性樹脂からなる、(1)に記載の肥料粒子。 (2) The fertilizer particles according to (1), wherein the resin in the resin composition comprises the biodegradable resin.
(3) 前記生分解性樹脂が、ポリブチレンアジペートテレフタレートからなる、(1)又は(2)に記載の肥料粒子。 (3) Fertilizer particles according to (1) or (2), wherein the biodegradable resin consists of polybutylene adipate terephthalate.
(4) 前記生分解性樹脂が、ポリブチレンアジペートテレフタレート及びポリ乳酸からなり、
前記ポリブチレンアジペートテレフタレートと前記ポリ乳酸との質量比が、50:50~90:10である、(1)又は(2)に記載の肥料粒子。
(4) the biodegradable resin comprises polybutylene adipate terephthalate and polylactic acid;
The fertilizer particles according to (1) or (2), wherein the mass ratio of the polybutylene adipate terephthalate and the polylactic acid is 50:50 to 90:10.
(5) 前記生分解性樹脂が、ポリブチレンアジペートテレフタレート及び酢酸セルロースからなり、
前記ポリブチレンアジペートテレフタレートと前記酢酸セルロースとの質量比が、50:50~90:10である、(1)又は(2)に記載の肥料粒子。
(5) the biodegradable resin comprises polybutylene adipate terephthalate and cellulose acetate;
Fertilizer particles according to (1) or (2), wherein the weight ratio of the polybutylene adipate terephthalate and the cellulose acetate is from 50:50 to 90:10.
(6) 前記酢酸セルロースの酢化度が、50%以上65%以下である、(5)に記載の肥料粒子。 (6) The fertilizer particles according to (5), wherein the acetylation degree of the cellulose acetate is 50% or more and 65% or less.
(7) 前記炭酸カルシウムが、重質炭酸カルシウムである、(1)から(6)のいずれかに記載の肥料粒子。 (7) Fertilizer particles according to any one of (1) to (6), wherein the calcium carbonate is ground calcium carbonate.
(8) 前記無機物質の平均粒子径が、0.7μm以上6.0μm以下である、(1)から(7)のいずれかに記載の肥料粒子。 (8) The fertilizer particles according to any one of (1) to (7), wherein the inorganic substance has an average particle size of 0.7 μm or more and 6.0 μm or less.
(9) 前記樹脂組成物が、セルロースパウダー、木粉、デンプン、モミ殻、オカラ、及びフスマからなる群から選択される1以上の天然有機物を含み、
前記天然有機物の含有量が、前記樹脂組成物に対して、2.0質量%以上30.0質量%以下である、(1)から(8)のいずれかに記載の肥料粒子。
(9) the resin composition contains one or more natural organic substances selected from the group consisting of cellulose powder, wood flour, starch, rice husks, bean curd refuse, and wheat bran;
The fertilizer particles according to any one of (1) to (8), wherein the content of the natural organic matter is 2.0% by mass or more and 30.0% by mass or less with respect to the resin composition.
(10) 前記樹脂組成物が、クエン酸アセチルトリブチルを含み、
前記クエン酸アセチルトリブチルの含有量が、前記樹脂組成物に対して、2.0質量%以上20.0質量%以下である、(1)から(9)のいずれかに記載の肥料粒子。
(10) the resin composition contains acetyltributyl citrate;
The fertilizer particles according to any one of (1) to (9), wherein the content of the acetyltributyl citrate is 2.0% by mass or more and 20.0% by mass or less with respect to the resin composition.
本発明によれば、肥料成分の溶出制御性が良好な、生分解性樹脂含有肥料粒子が提供される。 According to the present invention, there is provided a biodegradable resin-containing fertilizer particle with good elution controllability of fertilizer components.
以下、本発明の実施形態について説明するが、本発明はこれに限定されない。 Embodiments of the present invention will be described below, but the present invention is not limited thereto.
<本発明の肥料粒子>
本発明の肥料粒子は、肥料成分が樹脂組成物に被覆された肥料粒子であって、
該樹脂組成物が、生分解性樹脂及び無機物質を含み、
該生分解性樹脂が、少なくともポリブチレンアジペートテレフタレートを含み、
該生分解性樹脂と該無機物質との質量比が、10:90~70:30であり、
該無機物質が、炭酸カルシウム及び/又はドロマイトであるものである。
<Fertilizer particles of the present invention>
The fertilizer particles of the present invention are fertilizer particles in which a fertilizer component is coated with a resin composition,
the resin composition comprises a biodegradable resin and an inorganic substance;
the biodegradable resin comprises at least polybutylene adipate terephthalate;
The mass ratio of the biodegradable resin and the inorganic substance is 10:90 to 70:30,
The inorganic substance is calcium carbonate and/or dolomite.
ポリブチレンアジペートテレフタレート(以下、「PBAT」ともいう。)は、良好な生分解性を有する。したがって、PBATを被覆された肥料粒子は、環境汚染等の問題を生じにくい。
他方で、本発明者は、PBATのみを被覆した肥料粒子は、肥料成分の多くが短期間で溶出してしまい、肥料成分の徐放が難しいことを見出した。
Polybutylene adipate terephthalate (hereinafter also referred to as "PBAT") has good biodegradability. Therefore, fertilizer particles coated with PBAT are less likely to cause problems such as environmental pollution.
On the other hand, the present inventor found that fertilizer particles coated only with PBAT eluted many of the fertilizer components in a short period of time, making it difficult to release the fertilizer components in a controlled manner.
そこで、本発明者が更に検討した結果、PBATを含む生分解性樹脂とともに、炭酸カルシウム及び/又はドロマイトを所定比で配合した樹脂組成物を被覆材として用いることで、意外にも、環境への負荷を低減しつつも上記問題を解決できることを見出した。
したがって、本発明の肥料粒子は、環境汚染を引き起こしにくいだけではなく、肥料成分の溶出制御性が良好である。
Therefore, as a result of further studies by the present inventors, it was found that the use of a resin composition containing calcium carbonate and/or dolomite at a predetermined ratio together with a biodegradable resin containing PBAT as a coating material unexpectedly contributes to the environment. We have found that the above problem can be solved while reducing the load.
Therefore, the fertilizer particles of the present invention not only hardly cause environmental pollution, but also have good elution controllability of the fertilizer components.
本発明において「肥料成分の溶出制御性」とは、施肥された肥料粒子中の肥料成分の溶出割合や溶出速度が制御されていることを包含する。
例えば、肥料成分の溶出制御性が良好な肥料粒子によれば、溶出率が高い値(例えば、50%以上、60%以上、80%以上)に到達するまでの日数が長くなる(例えば、70日以上、80日以上、90日以上)。
In the present invention, the term "fertilizer component elution controllability" includes controlling the elution rate and elution rate of the fertilizer component in the applied fertilizer particles.
For example, according to fertilizer particles with good elution controllability of fertilizer components, the number of days until the elution rate reaches a high value (e.g., 50% or more, 60% or more, 80% or more) becomes longer (e.g., 70% or more) days or more, 80 days or more, 90 days or more).
本発明において「溶出率」とは、肥料粒子に配合した肥料成分の総量に対する、肥料粒子から溶出した肥料成分の総量の割合(単位:%)を意味する。 In the present invention, the "elution rate" means the ratio (unit: %) of the total amount of fertilizer components eluted from the fertilizer particles to the total amount of the fertilizer components blended in the fertilizer particles.
「溶出制御性」は、実施例に示した溶出試験により評価できる。 "Dissolution controllability" can be evaluated by the dissolution test shown in Examples.
「溶出率」は、比色法に基づき算出できる。 "Dissolution rate" can be calculated based on a colorimetric method.
以下、本発明の肥料粒子の構成について詳述する。 Hereinafter, the composition of the fertilizer particles of the present invention will be described in detail.
(樹脂組成物)
本発明における樹脂組成物は、ポリブチレンアジペートテレフタレートを含む生分解性樹脂、並びに、炭酸カルシウム及び/又はドロマイトである無機物質を少なくとも含む。
(resin composition)
The resin composition in the present invention contains at least a biodegradable resin containing polybutylene adipate terephthalate and inorganic substances such as calcium carbonate and/or dolomite.
[生分解性樹脂]
本発明における生分解性樹脂は、PBATを含んでいれば良く、PBAT以外の生分解性樹脂を含んでいても良く、含んでいなくても良い。
[Biodegradable resin]
The biodegradable resin in the present invention only needs to contain PBAT, and may or may not contain biodegradable resins other than PBAT.
PBAT以外の生分解性樹脂としては、ポリ乳酸、酢酸セルロース、ポリヒドロキシブチレート、ポリ(3-ヒドロキシブチレート-コ-3-ヒドロキシヘキサノエート)、ポリカプロラクトン、ポリブチレンサクシネート、ポリエチレンサクシネート、ポリリンゴ酸、ポリグリコール酸、ポリジオキサノン、ポリ(2-オキセタノン)等が挙げられる。
上記のうち、本発明の効果が奏され易いという観点から、ポリ乳酸、及び酢酸セルロースが好ましい。
Biodegradable resins other than PBAT include polylactic acid, cellulose acetate, polyhydroxybutyrate, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), polycaprolactone, polybutylene succinate, and polyethylene succinate. , polymalic acid, polyglycolic acid, polydioxanone, poly(2-oxetanone), and the like.
Among the above, polylactic acid and cellulose acetate are preferable from the viewpoint that the effects of the present invention are likely to be exhibited.
本発明において「酢酸セルロース」とは、酢酸でエステル化されたモノマー単位を有するポリマーを包含する。酢酸セルロースは、酢酸の他にプロピオン酸や酪酸でエステル化されたモノマー単位を含むものであっても良い。
代表的な酢酸セルロースとしては、三酢酸セルロース(トリアセチルセルロース)、二酢酸セルロース等が挙げられる。
In the present invention, "cellulose acetate" includes polymers having monomer units esterified with acetic acid. Cellulose acetate may contain monomer units esterified with propionic acid or butyric acid in addition to acetic acid.
Typical cellulose acetates include cellulose triacetate (triacetyl cellulose), cellulose diacetate, and the like.
本発明における酢酸セルロースは、本発明の効果が奏され易いという観点から、酢化度が、好ましくは50%以上65%以下、より好ましくは53%以上60%以下である。 The cellulose acetate in the present invention has an acetylation degree of preferably 50% or more and 65% or less, more preferably 53% or more and 60% or less, from the viewpoint that the effects of the present invention are likely to be exhibited.
本発明において「酢化度」とは、ポリマー中のアセチル基を酢酸換算した割合を意味する。酢化度は、ASTM:D-817-91に基づき特定される。 In the present invention, the "acetylation degree" means the ratio of acetyl groups in the polymer converted to acetic acid. Acetylation is specified according to ASTM: D-817-91.
本発明の好ましい態様のひとつにおいて、生分解性樹脂は、PBATからなる(つまり、PBATの含有量が、生分解性樹脂に対して100質量%である。)。 In one preferred embodiment of the present invention, the biodegradable resin consists of PBAT (that is, the content of PBAT is 100% by mass with respect to the biodegradable resin).
本発明の好ましい態様のひとつにおいて、生分解性樹脂は、PBAT及びポリ乳酸からなる。
かかる態様において、PBATと、ポリ乳酸との質量比は、好ましくはPBAT:ポリ乳酸=50:50~90:10、より好ましくはPBAT:ポリ乳酸=60:40~80:20である。
In one preferred embodiment of the present invention, the biodegradable resin consists of PBAT and polylactic acid.
In this embodiment, the mass ratio of PBAT and polylactic acid is preferably PBAT:polylactic acid=50:50 to 90:10, more preferably PBAT:polylactic acid=60:40 to 80:20.
本発明の好ましい態様のひとつにおいて、生分解性樹脂は、PBAT及び酢酸セルロースからなる。
かかる態様において、PBATと、酢酸セルロースとの質量比は、好ましくはPBAT:酢酸セルロース=50:50~90:10、より好ましくはPBAT:酢酸セルロース=60:40~80:20である。
In one preferred embodiment of the invention, the biodegradable resin consists of PBAT and cellulose acetate.
In this embodiment, the mass ratio of PBAT and cellulose acetate is preferably PBAT:cellulose acetate = 50:50 to 90:10, more preferably PBAT:cellulose acetate = 60:40 to 80:20.
本発明の肥料粒子には、樹脂成分として、上記生分解性樹脂以外の成分を含んでいても良く、含んでいなくても良い。
ただし、環境への負荷を低減する観点から、本発明の肥料粒子は、樹脂成分として、上記生分解性樹脂以外を含まないことが好ましい(つまり、樹脂組成物中の樹脂が、上記生分解性樹脂からなることが好ましい。)。
The fertilizer particles of the present invention may or may not contain a component other than the biodegradable resin as a resin component.
However, from the viewpoint of reducing the burden on the environment, the fertilizer particles of the present invention preferably do not contain other than the biodegradable resin as a resin component (that is, the resin in the resin composition is the biodegradable preferably made of resin).
[無機物質]
本発明における樹脂組成物は、炭酸カルシウム及びドロマイトからなる群から選択される1以上の無機物質を含む。
[Inorganic substance]
The resin composition in the present invention contains one or more inorganic substances selected from the group consisting of calcium carbonate and dolomite.
本発明において「炭酸カルシウム」とは、「重質炭酸カルシウム」及び「軽質炭酸カルシウム」を包含する。炭酸カルシウムは、合成物でも良く、天然鉱物由来のものでも良い。 In the present invention, "calcium carbonate" includes "heavy calcium carbonate" and "light calcium carbonate". Calcium carbonate may be synthetic or derived from natural minerals.
「重質炭酸カルシウム」とは、天然炭酸カルシウムを機械的に粉砕等することで得られるものであり、化学的沈殿反応等によって製造される合成炭酸カルシウム(すなわち、軽質炭酸カルシウム)とは明確に区別される。
本発明の効果が奏され易いという観点から、炭酸カルシウムとしては重質炭酸カルシウムが好ましい。
“Heavy calcium carbonate” is obtained by mechanically pulverizing natural calcium carbonate. distinguished.
Heavy calcium carbonate is preferable as the calcium carbonate from the viewpoint that the effects of the present invention are likely to be exhibited.
本発明において「ドロマイト」とは、苦灰石(CaMg(CO3)2)を意味する。 In the present invention, "dolomite" means dolomite (CaMg( CO3 ) 2 ).
本発明における樹脂組成物には、炭酸カルシウム及びドロマイト以外の無機物質が含まれていても良く、含まれていなくても良い。
炭酸カルシウム及びドロマイト以外の無機物質としては、例えば、金属(カルシウム、マグネシウム、アルミニウム、チタン、鉄、亜鉛等)の塩(炭酸塩、硫酸塩、珪酸塩、リン酸塩、ホウ酸塩)、酸化物、及びこれらの水和物等が挙げられる。
具体的には、例えば、炭酸マグネシウム、酸化亜鉛、酸化チタン、シリカ、アルミナ、クレー、タルク、カオリン、水酸化アルミニウム、水酸化マグネシウム、ケイ酸アルミニウム、ケイ酸マグネシウム、ケイ酸カルシウム、硫酸アルミニウム、硫酸マグネシウム、硫酸カルシウム、リン酸マグネシウム、硫酸バリウム、珪砂、カーボンブラック、ゼオライト、モリブデン、珪藻土、セリサイト、シラス、亜硫酸カルシウム、硫酸ナトリウム、チタン酸カリウム、ベントナイト、ウォラストナイト、ドロマイト、黒鉛等が挙げられる。
これらの無機物質は、合成物でも良く、天然鉱物由来のものでも良い。
これらの無機物質は、1種単独で使用しても良く、2種以上を組み合わせて使用しても良い。
The resin composition in the present invention may or may not contain inorganic substances other than calcium carbonate and dolomite.
Examples of inorganic substances other than calcium carbonate and dolomite include salts (carbonates, sulfates, silicates, phosphates, borates) of metals (calcium, magnesium, aluminum, titanium, iron, zinc, etc.), oxidation and hydrates thereof.
Specifically, for example, magnesium carbonate, zinc oxide, titanium oxide, silica, alumina, clay, talc, kaolin, aluminum hydroxide, magnesium hydroxide, aluminum silicate, magnesium silicate, calcium silicate, aluminum sulfate, sulfuric acid Magnesium, calcium sulfate, magnesium phosphate, barium sulfate, silica sand, carbon black, zeolite, molybdenum, diatomaceous earth, sericite, shirasu, calcium sulfite, sodium sulfate, potassium titanate, bentonite, wollastonite, dolomite, graphite, etc. be done.
These inorganic substances may be synthetic substances or those derived from natural minerals.
These inorganic substances may be used singly or in combination of two or more.
本発明における無機物質の形態は、特に限定されないが、利用のし易さから、通常は粉末である。 Although the form of the inorganic substance in the present invention is not particularly limited, it is usually powder because of its ease of use.
本発明における無機物質の形状は、特に限定されないが、粒子状(球形、不定形等)、フレーク状、顆粒状、繊維状等が挙げられる。 The shape of the inorganic substance in the present invention is not particularly limited, but examples thereof include particulate (spherical, amorphous, etc.), flake, granular, fibrous and the like.
本発明における無機物質(ドロマイト以外)は、本発明の効果が奏され易いという観点から、平均粒子径が、好ましくは0.1μm以上6.0μm以下、より好ましくは0.2μm以上4.0μm以下である。
本発明におけるドロマイトは、本発明の効果が奏され易いという観点から、平均粒子径が、好ましくは10μm以上30μm以下、より好ましくは15μm以上25μm以下である。
The inorganic substance (other than dolomite) in the present invention has an average particle size of preferably 0.1 μm or more and 6.0 μm or less, more preferably 0.2 μm or more and 4.0 μm or less, from the viewpoint that the effects of the present invention are easily exhibited. is.
The dolomite in the present invention has an average particle size of preferably 10 μm or more and 30 μm or less, more preferably 15 μm or more and 25 μm or less, from the viewpoint that the effects of the present invention are likely to be exhibited.
本発明において「平均粒子径」とは、JIS M-8511に準じた空気透過法による比表面積の測定結果から計算した値を意味する。
平均粒子径の測定機器としては、例えば、島津製作所社製の比表面積測定装置「SS-100型」を好ましく用いることができる。
In the present invention, the "average particle size" means a value calculated from the measurement results of the specific surface area by the air permeation method according to JIS M-8511.
As a device for measuring the average particle diameter, for example, a specific surface area measuring device “SS-100 type” manufactured by Shimadzu Corporation can be preferably used.
本発明における無機物質は、以下の態様を全て包含する。
(態様1)無機物質が、炭酸カルシウム及びドロマイトのいずれかのみからなる。
(態様2)無機物質が、炭酸カルシウム及びドロマイトの両方のみからなる。
(態様3)無機物質が、炭酸カルシウム及び/又はドロマイトと、炭酸カルシウム及びドロマイト以外の無機物質と、からなる。
The inorganic substance in the present invention includes all of the following aspects.
(Mode 1) The inorganic substance consists of only one of calcium carbonate and dolomite.
(Aspect 2) The inorganic substance consists only of both calcium carbonate and dolomite.
(Mode 3) The inorganic substance consists of calcium carbonate and/or dolomite and an inorganic substance other than calcium carbonate and dolomite.
上記態様のうち、本発明の効果が奏され易いという観点から、(態様1)及び(態様2)が好ましく、(態様2)がより好ましい。 Of the above modes, (mode 1) and (mode 2) are preferable, and (mode 2) is more preferable, from the viewpoint that the effects of the present invention are likely to be exhibited.
(態様2)において、炭酸カルシウム及びドロマイトの割合は特に限定されないが、本発明の効果が奏され易いという観点から、炭酸カルシウムの割合が過半であることが好ましい。
炭酸カルシウムとドロマイトとの質量比(炭酸カルシウム:ドロマイト)は、好ましくは51:49~80:20、より好ましくは60:40~70:30である。
In (Aspect 2), the proportions of calcium carbonate and dolomite are not particularly limited, but from the viewpoint that the effects of the present invention are likely to be exhibited, the proportion of calcium carbonate is preferably the majority.
The mass ratio of calcium carbonate to dolomite (calcium carbonate:dolomite) is preferably 51:49 to 80:20, more preferably 60:40 to 70:30.
(態様3)において、各無機物質の割合は特に限定されないが、炭酸カルシウム及び/又はドロマイトの割合が高いほど本発明の効果が奏され易い。
各無機物質の質量比(炭酸カルシウム及びドロマイトの総量:炭酸カルシウム及びドロマイト以外の無機物質の総量)は、好ましくは99:1~80:20、より好ましくは99:1~90:10である。
In (Aspect 3), the ratio of each inorganic substance is not particularly limited, but the higher the ratio of calcium carbonate and/or dolomite, the more likely the effects of the present invention are exhibited.
The mass ratio of each inorganic substance (total amount of calcium carbonate and dolomite:total amount of inorganic substances other than calcium carbonate and dolomite) is preferably 99:1 to 80:20, more preferably 99:1 to 90:10.
[その他の成分]
本発明における樹脂組成物には、上記以外の成分が含まれていても良く、含まれていなくても良い。ただし、環境への負荷を低減する観点から、樹脂組成物は、生分解性が低い成分を含まないことが好ましい。
[Other ingredients]
The resin composition in the present invention may or may not contain components other than those described above. However, from the viewpoint of reducing the load on the environment, it is preferable that the resin composition does not contain components with low biodegradability.
本発明における樹脂組成物に含まれ得る成分としては、天然有機物、可塑剤等が挙げられる。これらの成分の種類や量は、得ようとする効果等に応じて適宜設定できる。 Components that can be contained in the resin composition of the present invention include natural organic substances, plasticizers, and the like. The types and amounts of these components can be appropriately set according to the effects to be obtained.
天然有機物としては、本発明の効果を高め易いという観点から、セルロースパウダー、木粉、デンプン、モミ殻、オカラ、及びフスマからなる群から選択される1以上が好ましい。 As the natural organic substance, one or more selected from the group consisting of cellulose powder, wood flour, starch, rice husk, bean curd refuse, and wheat bran is preferable from the viewpoint of enhancing the effect of the present invention.
本発明において「セルロースパウダー」とは、粉末状のセルロースであれば特に限定されない。
セルロースパウダーの平均粒子径は、好ましくは5μm以上45μm以下、より好ましくは10μm以上30μm以下である。
セルロースパウダーとしては市販品を使用しても良い。
In the present invention, "cellulose powder" is not particularly limited as long as it is powdered cellulose.
The average particle size of the cellulose powder is preferably 5 μm or more and 45 μm or less, more preferably 10 μm or more and 30 μm or less.
A commercially available product may be used as the cellulose powder.
本発明において「木粉」とは、任意の樹木(ヒノキ、スギ等)から得られた粉末であれば特に限定されない。
木粉の平均粒子径は、好ましくは20μm以上300μm以下、より好ましくは20μm以上45μm以下である。
木粉としては、例えば、「おがくず」として知られるものを使用できる。
In the present invention, "wood powder" is not particularly limited as long as it is powder obtained from any tree (cypress, Japanese cedar, etc.).
The average particle size of the wood flour is preferably 20 μm or more and 300 μm or less, more preferably 20 μm or more and 45 μm or less.
As wood flour, for example, what is known as "sawdust" can be used.
本発明において「デンプン」とは、樹脂とともに配合され得る任意の形態のものを使用できる。デンプンは、例えば粉末状であっても良い。 In the present invention, the "starch" can be of any form that can be blended with the resin. The starch may be powdered, for example.
本発明において「モミ殻」とは籾の最外皮を意味し、樹脂とともに配合され得る任意の形態のものを使用できる。モミ殻は、例えば粉末状であっても良い。 In the present invention, "rice husk" means the outermost hull of rice, and can be used in any form that can be blended with a resin. The rice hulls may be powdered, for example.
本発明において「オカラ」とは豆乳の搾り滓を意味し、樹脂とともに配合され得る任意の形態のものを使用できる。オカラは、乾燥物が好ましく、粉末乾燥物がより好ましい。 In the present invention, "okara" means soybean milk lees, and any form that can be blended with resin can be used. Okara is preferably a dried product, more preferably a dried powder.
本発明において「フスマ」とは小麦の製粉時に除かれる皮(外皮部、胚芽等)を意味し、樹脂とともに配合され得る任意の形態のものを使用できる。フスマは、例えば粉末状であっても良い。 In the present invention, the term "wheat bran" means the skin (husk, germ, etc.) removed during milling of wheat, and can be of any form that can be blended with resin. The bran may be powdered, for example.
天然有機物の含有量(総量)の上限は、樹脂組成物に対して、好ましくは30.0質量%以下、より好ましくは15.0質量%以下である。
天然有機物の含有量(総量)の下限は、樹脂組成物に対して、好ましくは2.0質量%以上、より好ましくは5.0質量%以上である。
The upper limit of the content (total amount) of the natural organic matter is preferably 30.0% by mass or less, more preferably 15.0% by mass or less, relative to the resin composition.
The lower limit of the content (total amount) of the natural organic matter is preferably 2.0% by mass or more, more preferably 5.0% by mass or more, relative to the resin composition.
可塑剤としては、例えば、クエン酸アセチルトリブチル、クエン酸トリエチル、クエン酸アセチルトリエチル、フタル酸ジブチル、フタル酸ジアリール、フタル酸ジメチル、フタル酸ジエチル、フタル酸ジ-2-メトキシエチル、酒石酸ジブチル、o-ベンゾイル安息香酸エステル、ジアセチン、エポキシ化大豆油等が挙げられる。
これらのうち、本発明の効果が奏され易いという観点から、クエン酸アセチルトリブチルが好ましい。
Examples of plasticizers include acetyltributyl citrate, triethyl citrate, acetyltriethyl citrate, dibutyl phthalate, diaryl phthalate, dimethyl phthalate, diethyl phthalate, di-2-methoxyethyl phthalate, dibutyl tartrate, o -benzoyl benzoic acid ester, diacetin, epoxidized soybean oil and the like.
Among these, acetyltributyl citrate is preferable from the viewpoint that the effects of the present invention are likely to be exhibited.
可塑剤としてクエン酸アセチルトリブチルを用いる場合、その含有量の上限は、本発明の樹脂組成物に対して、好ましくは20.0質量%以下、より好ましくは15.0質量%以下である。
可塑剤としてクエン酸アセチルトリブチルを用いる場合、その含有量の下限は、本発明の樹脂組成物に対して、好ましくは2.0質量%以上、より好ましくは5.0質量%以上である。
When acetyltributyl citrate is used as a plasticizer, the upper limit of its content is preferably 20.0% by mass or less, more preferably 15.0% by mass or less, relative to the resin composition of the present invention.
When acetyltributyl citrate is used as the plasticizer, the lower limit of its content is preferably 2.0% by mass or more, more preferably 5.0% by mass or more, relative to the resin composition of the present invention.
[樹脂組成物の組成]
本発明における樹脂組成物の組成は、生分解性樹脂と無機物質との質量比が、生分解性樹脂:無機物質=10:90~70:30を満たせば特に限定されない。
[Composition of resin composition]
The composition of the resin composition in the present invention is not particularly limited as long as the mass ratio of the biodegradable resin and the inorganic substance satisfies the biodegradable resin:inorganic substance=10:90 to 70:30.
生分解性樹脂と無機物質との質量比(生分解性樹脂:無機物質)は、好ましくは20:80~60:40、より好ましくは30:70~50:50である。 The mass ratio of the biodegradable resin to the inorganic substance (biodegradable resin:inorganic substance) is preferably 20:80 to 60:40, more preferably 30:70 to 50:50.
生分解性樹脂の含有量(総量)の上限は、樹脂組成物に対して、好ましくは95質量%以下、より好ましくは92質量%以下である。
生分解性樹脂の含有量(総量)の下限は、樹脂組成物に対して、好ましくは20質量%以上、より好ましくは30質量%以上である。
The upper limit of the content (total amount) of the biodegradable resin is preferably 95% by mass or less, more preferably 92% by mass or less, relative to the resin composition.
The lower limit of the content (total amount) of the biodegradable resin is preferably 20% by mass or more, more preferably 30% by mass or more, relative to the resin composition.
無機物質の含有量(総量)の上限は、樹脂組成物に対して、好ましくは90質量%以下、より好ましくは80質量%以下である。
無機物質の含有量(総量)の下限は、樹脂組成物に対して、好ましくは30質量%以上、より好ましくは50質量%以上である。
The upper limit of the content (total amount) of the inorganic substance is preferably 90% by mass or less, more preferably 80% by mass or less, relative to the resin composition.
The lower limit of the content (total amount) of the inorganic substance is preferably 30% by mass or more, more preferably 50% by mass or more, relative to the resin composition.
[樹脂組成物の製造方法]
樹脂組成物は、上記の成分を用いて、樹脂組成物の製造方法として従来知られる方法に基づき製造できる。
[Method for producing resin composition]
The resin composition can be produced using the above-described components according to a conventionally known method for producing a resin composition.
樹脂組成物は、例えば、成分の混合及び溶融混練等を経て得られる。
溶融混練は、例えば、二軸混練機等によって行っても良い。
The resin composition is obtained, for example, through mixing of components, melt-kneading, and the like.
Melt-kneading may be performed by, for example, a twin-screw kneader or the like.
本発明の樹脂組成物の形態は特に限定されないが、例えば、任意の大きさ及び形状のペレットであり得る。 Although the form of the resin composition of the present invention is not particularly limited, it may be, for example, pellets of any size and shape.
(肥料成分)
肥料成分としては、従来知られる任意の成分を採用し得る。
具体的には、
尿素、
アルデヒド縮合尿素類(ホルムアルデヒド縮合尿素、イソブチルアルデヒド縮合尿素等)、
硫酸グアニル尿素類、
石灰窒素、
アンモニウム化合物(硝酸アンモニウム、硫酸アンモニウム、塩化アンモニウム、リン酸二水素アンモニウム、リン酸水素二アンモニウム等)、
カリウム塩(硝酸カリウム、塩化カリウム、硫酸カリウム等)、
カルシウム塩(リン酸カルシウム、硫酸カルシウム、硝酸カルシウム、塩化カルシウム等)、
マグネシウム塩(硝酸マグネシウム、塩化マグネシウム、硫酸マグネシウム、リン酸マグネシウム等)、及び
鉄塩(硝酸第一鉄、硝酸第二鉄、リン酸第一鉄、リン酸第二鉄、硫酸第一鉄、硫酸第二鉄、塩酸第一鉄、塩酸第二鉄等)、
並びにこれらの複塩等が挙げられる。
これらの肥料成分は、1種単独で使用しても良く、2種以上を組み合わせて使用しても良い。
(Fertilizer component)
Any conventionally known component can be employed as the fertilizer component.
in particular,
urea,
aldehyde-condensed ureas (formaldehyde-condensed urea, isobutyraldehyde-condensed urea, etc.),
guanyl urea sulfates,
lime nitrogen,
ammonium compounds (ammonium nitrate, ammonium sulfate, ammonium chloride, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, etc.),
potassium salts (potassium nitrate, potassium chloride, potassium sulfate, etc.),
calcium salts (calcium phosphate, calcium sulfate, calcium nitrate, calcium chloride, etc.),
Magnesium salts (magnesium nitrate, magnesium chloride, magnesium sulfate, magnesium phosphate, etc.) and iron salts (ferrous nitrate, ferric nitrate, ferrous phosphate, ferric phosphate, ferrous sulfate, sulfuric acid ferric, ferrous hydrochloride, ferric hydrochloride, etc.),
and double salts thereof.
These fertilizer components may be used singly or in combination of two or more.
肥料成分の形状は、特に限定されないが、粒子状(球形、不定形等)、フレーク状、顆粒状、繊維状等が挙げられる。 The shape of the fertilizer component is not particularly limited, but may be particulate (spherical, irregular, etc.), flake, granular, fibrous, and the like.
肥料成分の平均粒子径は、好ましくは2mm以上7mm以下、より好ましくは3mm以上5mm以下である。 The average particle size of the fertilizer component is preferably 2 mm or more and 7 mm or less, more preferably 3 mm or more and 5 mm or less.
<本発明の肥料粒子の製造方法>
従来知られる任意の方法によって、肥料成分の表面を樹脂組成物で被覆することで本発明の肥料粒子が得られる。
<Method for producing fertilizer particles of the present invention>
The fertilizer particles of the present invention can be obtained by coating the surface of the fertilizer component with the resin composition by any conventionally known method.
被覆の方法としては、例えば、以下の方法を採用できる。
(1)樹脂組成物を溶剤に溶解させ、樹脂溶液を得る。溶剤としては、テトラクロロエチレン、トリクロロエチレン等が挙げられる。
(2)樹脂溶液を、肥料成分の表面に塗布する。塗布の方法としては噴霧等が挙げられる。
(3)噴霧後、適宜乾燥し、樹脂組成物に被覆された肥料粒子が得られる。
As a coating method, for example, the following method can be adopted.
(1) A resin composition is dissolved in a solvent to obtain a resin solution. Solvents include tetrachlorethylene, trichlorethylene and the like.
(2) The resin solution is applied to the surface of the fertilizer component. Spraying etc. are mentioned as the method of application.
(3) After spraying, it is appropriately dried to obtain fertilizer particles coated with the resin composition.
肥料成分に被覆する樹脂組成物の量は特に限定されないが、肥料成分に対して、好ましくは10質量%以上、より好ましくは15質量%以上である。
肥料成分に被覆する樹脂組成物の量は過度でなくとも良く、肥料成分に対して、好ましくは30質量%以下、より好ましくは25質量%以下である。
Although the amount of the resin composition to coat the fertilizer component is not particularly limited, it is preferably 10% by mass or more, more preferably 15% by mass or more, relative to the fertilizer component.
The amount of the resin composition that coats the fertilizer component does not have to be excessive, and is preferably 30% by mass or less, more preferably 25% by mass or less, relative to the fertilizer component.
以下に、実施例により本発明を更に詳しく説明するが、本発明はこれらの実施例に限定されるものではない。 EXAMPLES The present invention will be described in more detail below with reference to Examples, but the present invention is not limited to these Examples.
<樹脂組成物の作製>
表1乃至18に示す各成分を含む樹脂組成物を準備した。なお、表中の組成の数値の単位は「質量%」である。
<Preparation of resin composition>
A resin composition containing each component shown in Tables 1 to 18 was prepared. In addition, the unit of the numerical value of a composition in a table|surface is "mass %."
樹脂組成物中の各成分の詳細は下記の通りである。なお、以下、「平均粒子径」とは、島津製作所社製の比表面積測定装置「SS-100型」を用い、JIS M-8511に準じた空気透過法による比表面積の測定結果から計算した値である。 Details of each component in the resin composition are as follows. Hereinafter, the "average particle size" is a value calculated from the measurement results of the specific surface area by the air permeation method according to JIS M-8511 using a specific surface area measuring device "SS-100 type" manufactured by Shimadzu Corporation. is.
(生分解性樹脂)
生分解性樹脂1:ポリブチレンアジペートテレフタレートのみからなる。
生分解性樹脂2:ポリブチレンアジペートテレフタレート70質量%、及びポリ乳酸30質量%からなる。
生分解性樹脂3:ポリブチレンサクシネートアジペート70質量%、及び酢酸セルロース(トリアセチルセルロース、酢化度=約55%)30質量%からなる。
(biodegradable resin)
Biodegradable resin 1: Consists only of polybutylene adipate terephthalate.
Biodegradable resin 2: 70% by mass of polybutylene adipate terephthalate and 30% by mass of polylactic acid.
Biodegradable resin 3: 70% by mass of polybutylene succinate adipate and 30% by mass of cellulose acetate (triacetyl cellulose, degree of acetylation = about 55%).
(無機物質)
炭カル1:重質炭酸カルシウム粒子(平均粒子径:2.2μm、表面処理なし)
炭カル2:軽質炭酸カルシウム粒子(平均粒子径:1.5μm、表面処理なし)
ドロマイト:ドロマイト粒子(平均粒子径:20μm、表面処理なし)
炭マグ:炭酸マグネシウム粒子(平均粒子径:0.3μm、表面処理なし)
タルク:タルク粒子(平均粒子径:3.0μm、表面処理なし)
(inorganic substance)
Charcoal 1: Heavy calcium carbonate particles (average particle size: 2.2 μm, no surface treatment)
Charcoal 2: Light calcium carbonate particles (average particle size: 1.5 μm, no surface treatment)
Dolomite: Dolomite particles (average particle size: 20 μm, no surface treatment)
Charcoal mug: Magnesium carbonate particles (average particle size: 0.3 μm, no surface treatment)
Talc: talc particles (average particle size: 3.0 μm, no surface treatment)
(天然有機物)
セルロースパウダー:平均粒子径20μm
木粉:平均粒子径30μm、ヒノキ由来
デンプン:粉末状
モミ殻:粉末状
オカラ:粉末乾燥物
フスマ:粉末状
(natural organic matter)
Cellulose powder: average particle size 20 μm
Wood flour: Average particle size 30 μm, derived from cypress Starch: Powder Rice husk: Powder Okara: Dried powder Bran: Powder
(その他)
可塑剤:クエン酸アセチルトリブチル
(others)
Plasticizer: Acetyltributyl citrate
<肥料粒子の作製>
作製した各樹脂組成物を、溶剤(テトラクロロエチレン)に溶解させ、樹脂溶液を得た。
得られた樹脂溶液を、市販の噴霧装置を用いて、肥料成分(平均粒子径約3mmの粒状尿素)に噴霧し、樹脂組成物に被覆された肥料粒子を得た。
なお、各樹脂組成物の噴霧量は、肥料成分に対して15質量%程度に設定した。
<Production of Fertilizer Particles>
Each prepared resin composition was dissolved in a solvent (tetrachloroethylene) to obtain a resin solution.
The resulting resin solution was sprayed onto the fertilizer component (granular urea having an average particle size of about 3 mm) using a commercially available spraying device to obtain fertilizer particles coated with the resin composition.
The spray amount of each resin composition was set to about 15% by mass with respect to the fertilizer component.
<肥料粒子の評価>
特開2003-055079号公報に記載された方法に準じて、溶出試験を行った。
具体的には、各樹脂組成物に被覆された肥料粒子(10g)を、脱イオン水(200g)に浸漬させ、25℃の恒温槽に入れ、90日保管した。
保管開始10日後、40日後、及び90日後の各時点で溶出率を算出した。
溶出率は、脱イオン水中に溶出した肥料成分に基づいて比色法を用いて測定した。
得られた溶出率に基づき、肥料粒子の溶出性を以下の基準で評価した。
<Evaluation of fertilizer particles>
A dissolution test was performed according to the method described in JP-A-2003-055079.
Specifically, fertilizer particles (10 g) coated with each resin composition were immersed in deionized water (200 g), placed in a constant temperature bath at 25° C., and stored for 90 days.
The elution rate was calculated at each time point 10 days, 40 days, and 90 days after the start of storage.
The elution rate was determined using a colorimetric method based on the eluted fertilizer components in deionized water.
Based on the obtained elution rate, the elution property of the fertilizer particles was evaluated according to the following criteria.
(評価基準)
A:保管開始10日後の溶出率が20%未満であり、保管開始40日後の溶出率が40%未満であり、保管開始90日後の溶出率が60%未満だった。
B:保管開始10日後の溶出率が20%未満であり、保管開始40日後の溶出率が40%未満であり、保管開始90日後の溶出率が80%未満だった。
C:保管開始10日後の溶出率が20%未満であり、保管開始40日後の溶出率が40%未満であり、保管開始90日後の溶出率が80%超だった。
D:保管開始10日後の溶出率が20%未満であり、保管開始40日後の溶出率が40%超だった。
E:保管開始10日後の溶出率が20%超だった。
(Evaluation criteria)
A: The elution rate after 10 days of storage was less than 20%, the elution rate after 40 days of storage was less than 40%, and the elution rate after 90 days of storage was less than 60%.
B: The elution rate after 10 days of storage was less than 20%, the elution rate after 40 days of storage was less than 40%, and the elution rate after 90 days of storage was less than 80%.
C: The elution rate after 10 days of storage was less than 20%, the elution rate after 40 days of storage was less than 40%, and the elution rate after 90 days of storage was more than 80%.
D: The elution rate after 10 days of storage was less than 20%, and the elution rate after 40 days of storage was greater than 40%.
E: The elution rate 10 days after the start of storage was over 20%.
本例において、溶出率は経時的に高くなるが、溶出率が高い値(例えば80%)に到達するまでの日数が長いほど、溶出制御性が高いことを意味する。 In this example, the dissolution rate increases over time, and the longer the number of days until the dissolution rate reaches a high value (for example, 80%), the higher the dissolution controllability.
上記表に示される通り、本発明の要件を満たす肥料粒子は、長期にわたって肥料成分が溶出しており、溶出制御性が高かった。 As shown in the above table, the fertilizer particles satisfying the requirements of the present invention were eluted with fertilizer components over a long period of time and had high elution controllability.
他方で、本発明の要件を満たさない肥料粒子は、初期溶出率(本例では保管開始10日後の溶出率)が高く、溶出制御性が低かった。 On the other hand, the fertilizer particles that did not satisfy the requirements of the present invention had a high initial elution rate (in this example, the elution rate after 10 days from the start of storage) and low elution controllability.
肥料粒子の溶出制御性は、樹脂組成物に炭酸カルシウム及びドロマイトの両方が含まれている場合、樹脂組成物に含まれる無機物質が重質炭酸カルシウムである場合、又は、樹脂組成物に天然有機物が含まれている場合に、より向上し易い傾向にあった。 The elution controllability of the fertilizer particles is determined when the resin composition contains both calcium carbonate and dolomite, when the inorganic substance contained in the resin composition is heavy calcium carbonate, or when the resin composition contains natural organic substances. was included, it tended to be more easily improved.
なお、本例で用いた樹脂組成物は、いずれも良好な生分解性を有していた。 All of the resin compositions used in this example had good biodegradability.
Claims (10)
前記樹脂組成物が、生分解性樹脂及び無機物質を含み、
前記生分解性樹脂が、少なくともポリブチレンアジペートテレフタレートを含み、
前記生分解性樹脂と前記無機物質との質量比が、10:90~70:30であり、
前記無機物質が、炭酸カルシウム及び/又はドロマイトである、
肥料粒子。 A fertilizer component is a fertilizer particle coated with a resin composition,
the resin composition comprises a biodegradable resin and an inorganic substance,
The biodegradable resin contains at least polybutylene adipate terephthalate,
The mass ratio of the biodegradable resin and the inorganic substance is 10:90 to 70:30,
wherein the inorganic substance is calcium carbonate and/or dolomite;
fertilizer particles.
前記ポリブチレンアジペートテレフタレートと前記ポリ乳酸との質量比が、50:50~90:10である、請求項1又は2に記載の肥料粒子。 The biodegradable resin is composed of polybutylene adipate terephthalate and polylactic acid,
Fertilizer particles according to claim 1 or 2, wherein the weight ratio of said polybutylene adipate terephthalate and said polylactic acid is from 50:50 to 90:10.
前記ポリブチレンアジペートテレフタレートと前記酢酸セルロースとの質量比が、50:50~90:10である、請求項1又は2に記載の肥料粒子。 the biodegradable resin comprises polybutylene adipate terephthalate and cellulose acetate;
Fertilizer particles according to claim 1 or 2, wherein the weight ratio of said polybutylene adipate terephthalate and said cellulose acetate is from 50:50 to 90:10.
前記天然有機物の含有量が、前記樹脂組成物に対して、2.0質量%以上30.0質量%以下である、請求項1から8のいずれかに記載の肥料粒子。 The resin composition contains one or more natural organic substances selected from the group consisting of cellulose powder, wood flour, starch, rice husks, bean curd refuse, and bran,
The fertilizer particles according to any one of claims 1 to 8, wherein the content of said natural organic matter is 2.0% by mass or more and 30.0% by mass or less with respect to said resin composition.
前記クエン酸アセチルトリブチルの含有量が、前記樹脂組成物に対して、2.0質量%以上20.0質量%以下である、請求項1から9のいずれかに記載の肥料粒子。 The resin composition contains acetyltributyl citrate,
The fertilizer particles according to any one of claims 1 to 9, wherein the content of said acetyltributyl citrate is 2.0% by mass or more and 20.0% by mass or less with respect to said resin composition.
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