JP2529632C - - Google Patents

Info

Publication number

JP2529632C

JP2529632C JP2529632C JP 2529632 C JP2529632 C JP 2529632C JP 2529632 C JP2529632 C JP 2529632C

Authority

JP

Japan

Prior art keywords

initiator

suspension

weight

particles

smaller

Prior art date

1999-06-28

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.)

Expired - Lifetime

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• 239000003999 initiator Substances 0.000 claims description 90
• 239000000725 suspension Substances 0.000 claims description 67
• 239000002245 particle Substances 0.000 claims description 35
• XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
• 238000002844 melting Methods 0.000 claims description 15
• 239000007787 solid Substances 0.000 claims description 14
• 150000002978 peroxides Chemical class 0.000 claims description 13
• 238000010438 heat treatment Methods 0.000 claims description 12
• 239000000203 mixture Substances 0.000 claims description 10
• 238000006116 polymerization reaction Methods 0.000 claims description 9
• 238000001816 cooling Methods 0.000 claims description 8
• 150000002148 esters Chemical class 0.000 claims description 8
• 239000007900 aqueous suspension Substances 0.000 claims description 7
• 239000002253 acid Substances 0.000 claims description 6
• YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical group CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 claims description 4
• 238000000034 method Methods 0.000 claims description 4
• 238000010791 quenching Methods 0.000 claims description 4
• 230000000171 quenching Effects 0.000 claims description 4
• QWVBGCWRHHXMRM-UHFFFAOYSA-N hexadecoxycarbonyloxy hexadecyl carbonate Chemical compound CCCCCCCCCCCCCCCCOC(=O)OOC(=O)OCCCCCCCCCCCCCCCC QWVBGCWRHHXMRM-UHFFFAOYSA-N 0.000 claims description 3
• CSKKAINPUYTTRW-UHFFFAOYSA-N tetradecoxycarbonyloxy tetradecyl carbonate Chemical compound CCCCCCCCCCCCCCOC(=O)OOC(=O)OCCCCCCCCCCCCCC CSKKAINPUYTTRW-UHFFFAOYSA-N 0.000 claims description 3
• LPOZESWHPWKVCO-UHFFFAOYSA-N docosyl 2-[(2-methylpropan-2-yl)oxyperoxy]-2-oxoacetate Chemical compound CCCCCCCCCCCCCCCCCCCCCCOC(=O)C(=O)OOOC(C)(C)C LPOZESWHPWKVCO-UHFFFAOYSA-N 0.000 claims 2
• NOBYOEQUFMGXBP-UHFFFAOYSA-N (4-tert-butylcyclohexyl) (4-tert-butylcyclohexyl)oxycarbonyloxy carbonate Chemical compound C1CC(C(C)(C)C)CCC1OC(=O)OOC(=O)OC1CCC(C(C)(C)C)CC1 NOBYOEQUFMGXBP-UHFFFAOYSA-N 0.000 claims 1
• STEKLRLQGZCGKC-UHFFFAOYSA-N (4-tert-butylcyclohexyl) (4-tert-butylcyclohexyl)oxycarbonyloxyperoxy carbonate Chemical compound C1CC(C(C)(C)C)CCC1OC(=O)OOOOC(=O)OC1CCC(C(C)(C)C)CC1 STEKLRLQGZCGKC-UHFFFAOYSA-N 0.000 claims 1
• 125000005634 peroxydicarbonate group Chemical group 0.000 claims 1
• -1 azo compound Chemical class 0.000 description 18
• 239000000084 colloidal system Substances 0.000 description 16
• 239000003995 emulsifying agent Substances 0.000 description 16
• 230000001681 protective Effects 0.000 description 16
• 238000004519 manufacturing process Methods 0.000 description 9
• MUBZPKHOEPUJKR-UHFFFAOYSA-L oxalate Chemical compound [O-]C(=O)C([O-])=O MUBZPKHOEPUJKR-UHFFFAOYSA-L 0.000 description 8
• 239000000839 emulsion Substances 0.000 description 6
• 125000000217 alkyl group Chemical group 0.000 description 5
• 230000036499 Half live Effects 0.000 description 4
• GLDOVTGHNKAZLK-UHFFFAOYSA-N Stearyl alcohol Chemical class CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 4
• QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
• 125000002511 behenyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
• XYXGFHALMTXBQX-UHFFFAOYSA-L carboxylatooxy carbonate Chemical compound [O-]C(=O)OOC([O-])=O XYXGFHALMTXBQX-UHFFFAOYSA-L 0.000 description 4
• 150000001875 compounds Chemical class 0.000 description 4
• 238000002156 mixing Methods 0.000 description 4
• MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
• 229910052760 oxygen Inorganic materials 0.000 description 4
• 239000001301 oxygen Substances 0.000 description 4
• 229920000642 polymer Polymers 0.000 description 4
• BZHJMEDXRYGGRV-UHFFFAOYSA-N vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
• 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
• OMPJBNCRMGITSC-UHFFFAOYSA-N Incidol Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 3
• 125000004432 carbon atoms Chemical group C* 0.000 description 3
• 235000014113 dietary fatty acids Nutrition 0.000 description 3
• 238000009826 distribution Methods 0.000 description 3
• 239000000194 fatty acid Substances 0.000 description 3
• 150000004665 fatty acids Chemical class 0.000 description 3
• 239000000178 monomer Substances 0.000 description 3
• ZBJVLWIYKOAYQH-UHFFFAOYSA-N naphthalen-2-yl 2-hydroxybenzoate Chemical compound OC1=CC=CC=C1C(=O)OC1=CC=C(C=CC=C2)C2=C1 ZBJVLWIYKOAYQH-UHFFFAOYSA-N 0.000 description 3
• 238000002360 preparation method Methods 0.000 description 3
• 229920005989 resin Polymers 0.000 description 3
• 239000011347 resin Substances 0.000 description 3
• 238000000926 separation method Methods 0.000 description 3
• PPBRXRYQALVLMV-UHFFFAOYSA-N styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 3
• 239000004372 Polyvinyl alcohol Substances 0.000 description 2
• 229920001567 Vinyl ester Polymers 0.000 description 2
• NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
• NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
• 125000001931 aliphatic group Chemical group 0.000 description 2
• 150000001336 alkenes Chemical class 0.000 description 2
• 239000003945 anionic surfactant Substances 0.000 description 2
• 239000003093 cationic surfactant Substances 0.000 description 2
• 239000002826 coolant Substances 0.000 description 2
• 230000000875 corresponding Effects 0.000 description 2
• 238000010586 diagram Methods 0.000 description 2
• 238000006460 hydrolysis reaction Methods 0.000 description 2
• CERQOIWHTDAKMF-UHFFFAOYSA-N methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
• 150000001451 organic peroxides Chemical class 0.000 description 2
• 150000002976 peresters Chemical class 0.000 description 2
• NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
• 229920002451 polyvinyl alcohol Polymers 0.000 description 2
• 229920000915 polyvinyl chloride Polymers 0.000 description 2
• 239000011541 reaction mixture Substances 0.000 description 2
• 150000003839 salts Chemical class 0.000 description 2
• 238000004062 sedimentation Methods 0.000 description 2
• 239000011780 sodium chloride Substances 0.000 description 2
• 239000000126 substance Substances 0.000 description 2
• 239000004094 surface-active agent Substances 0.000 description 2
• 238000009827 uniform distribution Methods 0.000 description 2
• PYHRZPFZZDCOPH-QXGOIDDHSA-N (S)-amphetamine sulfate Chemical compound [H+].[H+].[O-]S([O-])(=O)=O.C[C@H](N)CC1=CC=CC=C1.C[C@H](N)CC1=CC=CC=C1 PYHRZPFZZDCOPH-QXGOIDDHSA-N 0.000 description 1
• ULUAUXLGCMPNKK-UHFFFAOYSA-N (±)-Sulfobutanedioic acid Chemical compound OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 1
• LGXVIGDEPROXKC-UHFFFAOYSA-N 1,1-Dichloroethene Chemical compound ClC(Cl)=C LGXVIGDEPROXKC-UHFFFAOYSA-N 0.000 description 1
• ZVYSYCLZXICWLH-UHFFFAOYSA-N 1,3-dioxetan-2-one Chemical compound O=C1OCO1 ZVYSYCLZXICWLH-UHFFFAOYSA-N 0.000 description 1
• KTZVZZJJVJQZHV-UHFFFAOYSA-N 1-chloro-4-ethenylbenzene Chemical compound ClC1=CC=C(C=C)C=C1 KTZVZZJJVJQZHV-UHFFFAOYSA-N 0.000 description 1
• NGTHSDWSPHLVOY-UHFFFAOYSA-N 1-ethoxypropane-1,2,3-triol Chemical class CCOC(O)C(O)CO NGTHSDWSPHLVOY-UHFFFAOYSA-N 0.000 description 1
• PTCHOCKDDCIPGX-UHFFFAOYSA-N 1-hexadecylperoxyhexadecane Chemical group CCCCCCCCCCCCCCCCOOCCCCCCCCCCCCCCCC PTCHOCKDDCIPGX-UHFFFAOYSA-N 0.000 description 1
• HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 1
• QOWAMIUFBNBINS-UHFFFAOYSA-N 2-[6-[4,5-diethoxy-2-(ethoxymethyl)-6-methoxyoxan-3-yl]oxy-4,5-dimethoxy-2-(methoxymethyl)oxan-3-yl]oxy-6-(hydroxymethyl)-5-methoxyoxane-3,4-diol Chemical group CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(OC)C(OC)C(OC2C(C(O)C(OC)C(CO)O2)O)C(COC)O1 QOWAMIUFBNBINS-UHFFFAOYSA-N 0.000 description 1
• GYCMBHHDWRMZGG-UHFFFAOYSA-N 2-cyanopropene-1 Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
• VVQNEPGJFQJSBK-UHFFFAOYSA-N 2-methyl-2-propenoic acid methyl ester Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
• CWSZBVAUYPTXTG-UHFFFAOYSA-N 5-[6-[[3,4-dihydroxy-6-(hydroxymethyl)-5-methoxyoxan-2-yl]oxymethyl]-3,4-dihydroxy-5-[4-hydroxy-3-(2-hydroxyethoxy)-6-(hydroxymethyl)-5-methoxyoxan-2-yl]oxyoxan-2-yl]oxy-6-(hydroxymethyl)-2-methyloxane-3,4-diol Chemical group O1C(CO)C(OC)C(O)C(O)C1OCC1C(OC2C(C(O)C(OC)C(CO)O2)OCCO)C(O)C(O)C(OC2C(OC(C)C(O)C2O)CO)O1 CWSZBVAUYPTXTG-UHFFFAOYSA-N 0.000 description 1
• 241000251468 Actinopterygii Species 0.000 description 1
• XXROGKLTLUQVRX-UHFFFAOYSA-N Allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 1
• UDRJCPSUFPIXBY-UHFFFAOYSA-N C(C(=O)OOOC1(CCCCC1)C)(=O)OCCCCCCCCCCCCCCCCCC Chemical compound C(C(=O)OOOC1(CCCCC1)C)(=O)OCCCCCCCCCCCCCCCCCC UDRJCPSUFPIXBY-UHFFFAOYSA-N 0.000 description 1
• BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate dianion Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
• 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
• 229940105329 Carboxymethylcellulose Drugs 0.000 description 1
• 229920000896 Ethulose Polymers 0.000 description 1
• JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
• 239000001859 Ethyl hydroxyethyl cellulose Substances 0.000 description 1
• 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
• 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
• 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
• XJRBAMWJDBPFIM-UHFFFAOYSA-N Methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 description 1
• 210000004080 Milk Anatomy 0.000 description 1
• XAPRFLSJBSXESP-UHFFFAOYSA-N Oxycinchophen Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=C(O)C=1C1=CC=CC=C1 XAPRFLSJBSXESP-UHFFFAOYSA-N 0.000 description 1
• JNYAEWCLZODPBN-CTQIIAAMSA-N Sorbitan Chemical class OCC(O)C1OCC(O)[C@@H]1O JNYAEWCLZODPBN-CTQIIAAMSA-N 0.000 description 1
• 229920002472 Starch Polymers 0.000 description 1
• 241001080519 Zera Species 0.000 description 1
• 230000001133 acceleration Effects 0.000 description 1
• 150000001242 acetic acid derivatives Chemical class 0.000 description 1
• DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
• HRPVXLWXLXDGHG-UHFFFAOYSA-N acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
• NLHHRLWOUZZQLW-UHFFFAOYSA-N acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
• 239000000654 additive Substances 0.000 description 1
• 150000001298 alcohols Chemical class 0.000 description 1
• 125000002877 alkyl aryl group Chemical group 0.000 description 1
• 125000005907 alkyl ester group Chemical group 0.000 description 1
• 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
• 239000002280 amphoteric surfactant Substances 0.000 description 1
• 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
• 150000001491 aromatic compounds Chemical class 0.000 description 1
• 125000003118 aryl group Chemical group 0.000 description 1
• KAKZBPTYRLMSJV-UHFFFAOYSA-N butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 1
• 239000001768 carboxy methyl cellulose Substances 0.000 description 1
• 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
• ZFTFAPZRGNKQPU-UHFFFAOYSA-L carboxylato carbonate Chemical compound [O-]C(=O)OC([O-])=O ZFTFAPZRGNKQPU-UHFFFAOYSA-L 0.000 description 1
• 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
• 239000001913 cellulose Substances 0.000 description 1
• 229920002678 cellulose Polymers 0.000 description 1
• 238000006243 chemical reaction Methods 0.000 description 1
• 239000000498 cooling water Substances 0.000 description 1
• 229920001577 copolymer Polymers 0.000 description 1
• 238000000354 decomposition reaction Methods 0.000 description 1
• MWCBHBDTCGFJLM-UHFFFAOYSA-N docosyl 2-(2-methylpentan-2-yloxyperoxy)-2-oxoacetate Chemical compound CCCCCCCCCCCCCCCCCCCCCCOC(=O)C(=O)OOOC(C)(C)CCC MWCBHBDTCGFJLM-UHFFFAOYSA-N 0.000 description 1
• 230000000694 effects Effects 0.000 description 1
• 238000005485 electric heating Methods 0.000 description 1
• RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
• 238000007046 ethoxylation reaction Methods 0.000 description 1
• SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
• 235000019326 ethyl hydroxyethyl cellulose Nutrition 0.000 description 1
• 235000010944 ethyl methyl cellulose Nutrition 0.000 description 1
• 150000002191 fatty alcohols Chemical class 0.000 description 1
• PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
• 235000011187 glycerol Nutrition 0.000 description 1
• 239000011874 heated mixture Substances 0.000 description 1
• 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
• 229940071826 hydroxyethyl cellulose Drugs 0.000 description 1
• 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
• 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
• 229940071676 hydroxypropylcellulose Drugs 0.000 description 1
• 125000002463 lignoceryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
• 239000000463 material Substances 0.000 description 1
• CERQOIWHTDAKMF-UHFFFAOYSA-M methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
• 229920003087 methylethyl cellulose Polymers 0.000 description 1
• 235000013336 milk Nutrition 0.000 description 1
• 239000008267 milk Substances 0.000 description 1
• IMNFDUFMRHMDMM-UHFFFAOYSA-N n-heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 1
• NVCIHTTTXRLYBH-UHFFFAOYSA-N octadecyl 2-(2-methylhexan-2-yloxyperoxy)-2-oxoacetate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(=O)OOOC(C)(C)CCCC NVCIHTTTXRLYBH-UHFFFAOYSA-N 0.000 description 1
• CEWHUUYUBNWGSI-UHFFFAOYSA-N octadecyl 2-(2-methylpentan-2-yloxyperoxy)-2-oxoacetate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(=O)OOOC(C)(C)CCC CEWHUUYUBNWGSI-UHFFFAOYSA-N 0.000 description 1
• 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 description 1
• 150000004965 peroxy acids Chemical group 0.000 description 1
• 239000010452 phosphate Substances 0.000 description 1
• 229920001888 polyacrylic acid Polymers 0.000 description 1
• 239000004584 polyacrylic acid Substances 0.000 description 1
• 230000000379 polymerizing Effects 0.000 description 1
• 238000000197 pyrolysis Methods 0.000 description 1
• 239000008107 starch Substances 0.000 description 1
• 235000019698 starch Nutrition 0.000 description 1
• 150000003440 styrenes Chemical class 0.000 description 1
• LSNNMFCWUKXFEE-UHFFFAOYSA-N sulfonic acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
• 238000010557 suspension polymerization reaction Methods 0.000 description 1
• 229920002994 synthetic fiber Polymers 0.000 description 1
• JIYXDFNAPHIAFH-UHFFFAOYSA-N tert-butyl 3-tert-butylperoxycarbonylbenzoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC(C(=O)OC(C)(C)C)=C1 JIYXDFNAPHIAFH-UHFFFAOYSA-N 0.000 description 1
• 238000005979 thermal decomposition reaction Methods 0.000 description 1
• 125000002306 tributylsilyl group Chemical group C(CCC)[Si](CCCC)(CCCC)* 0.000 description 1
• 238000002604 ultrasonography Methods 0.000 description 1
• QYKIQEUNHZKYBP-UHFFFAOYSA-N vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1