WO2023106393A1 - 高級脂肪酸ナトリウム及び高級脂肪酸カリウム含有石鹸組成物の製造方法 - Google Patents
高級脂肪酸ナトリウム及び高級脂肪酸カリウム含有石鹸組成物の製造方法 Download PDFInfo
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- WO2023106393A1 WO2023106393A1 PCT/JP2022/045428 JP2022045428W WO2023106393A1 WO 2023106393 A1 WO2023106393 A1 WO 2023106393A1 JP 2022045428 W JP2022045428 W JP 2022045428W WO 2023106393 A1 WO2023106393 A1 WO 2023106393A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fatty acid
- mixed
- saturated fatty
- soap composition
- temperature
- Prior art date
Links
- 239000000344 soap Substances 0.000 title claims abstract description 161
- 239000000194 fatty acid Substances 0.000 title claims abstract description 145
- 235000014113 dietary fatty acids Nutrition 0.000 title claims abstract description 144
- 229930195729 fatty acid Natural products 0.000 title claims abstract description 144
- 239000000203 mixture Substances 0.000 title claims abstract description 142
- 150000004665 fatty acids Chemical class 0.000 title claims abstract description 137
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 239000011734 sodium Substances 0.000 title claims abstract description 37
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 37
- 239000011591 potassium Substances 0.000 title claims abstract description 34
- 229910052700 potassium Inorganic materials 0.000 title claims abstract description 34
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 95
- 150000004671 saturated fatty acids Chemical class 0.000 claims abstract description 91
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 75
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 44
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims abstract description 35
- 235000003441 saturated fatty acids Nutrition 0.000 claims abstract description 33
- 239000000110 cooling liquid Substances 0.000 claims abstract description 27
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 26
- 235000011187 glycerol Nutrition 0.000 claims abstract description 25
- 239000007864 aqueous solution Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 229910000027 potassium carbonate Inorganic materials 0.000 claims abstract description 15
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 13
- 125000004432 carbon atom Chemical group C* 0.000 claims description 43
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 34
- 238000006386 neutralization reaction Methods 0.000 claims description 31
- 239000003513 alkali Substances 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 25
- 235000019359 magnesium stearate Nutrition 0.000 claims description 17
- 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 claims description 16
- 239000000600 sorbitol Substances 0.000 claims description 16
- 229940063002 magnesium palmitate Drugs 0.000 claims description 13
- ABSWXCXMXIZDSN-UHFFFAOYSA-L magnesium;hexadecanoate Chemical compound [Mg+2].CCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCC([O-])=O ABSWXCXMXIZDSN-UHFFFAOYSA-L 0.000 claims description 13
- 239000000454 talc Substances 0.000 claims description 13
- 229910052623 talc Inorganic materials 0.000 claims description 13
- 235000000346 sugar Nutrition 0.000 claims description 6
- 150000008163 sugars Chemical class 0.000 claims description 5
- 239000011874 heated mixture Substances 0.000 claims description 3
- 235000014593 oils and fats Nutrition 0.000 claims 1
- 238000005187 foaming Methods 0.000 abstract description 22
- 238000002156 mixing Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 14
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract 1
- 239000006260 foam Substances 0.000 description 22
- 150000003839 salts Chemical class 0.000 description 19
- 239000008213 purified water Substances 0.000 description 16
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 15
- 235000011837 pasties Nutrition 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 14
- -1 fatty acid potassium salts Chemical class 0.000 description 14
- 230000014759 maintenance of location Effects 0.000 description 14
- 238000011156 evaluation Methods 0.000 description 12
- 235000011181 potassium carbonates Nutrition 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 10
- 230000007774 longterm Effects 0.000 description 9
- 239000000243 solution Substances 0.000 description 8
- PRAKJMSDJKAYCZ-UHFFFAOYSA-N squalane Chemical compound CC(C)CCCC(C)CCCC(C)CCCCC(C)CCCC(C)CCCC(C)C PRAKJMSDJKAYCZ-UHFFFAOYSA-N 0.000 description 8
- 239000005639 Lauric acid Substances 0.000 description 7
- 230000003472 neutralizing effect Effects 0.000 description 7
- 235000019198 oils Nutrition 0.000 description 7
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 239000002826 coolant Substances 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000004094 surface-active agent Substances 0.000 description 6
- 235000021314 Palmitic acid Nutrition 0.000 description 5
- 235000021355 Stearic acid Nutrition 0.000 description 5
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 5
- 229940072033 potash Drugs 0.000 description 5
- 235000015320 potassium carbonate Nutrition 0.000 description 5
- 238000007127 saponification reaction Methods 0.000 description 5
- 239000008117 stearic acid Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000003925 fat Substances 0.000 description 4
- JXTPJDDICSTXJX-UHFFFAOYSA-N n-Triacontane Natural products CCCCCCCCCCCCCCCCCCCCCCCCCCCCCC JXTPJDDICSTXJX-UHFFFAOYSA-N 0.000 description 4
- 229940045845 sodium myristate Drugs 0.000 description 4
- JUQGWKYSEXPRGL-UHFFFAOYSA-M sodium;tetradecanoate Chemical compound [Na+].CCCCCCCCCCCCCC([O-])=O JUQGWKYSEXPRGL-UHFFFAOYSA-M 0.000 description 4
- 229940032094 squalane Drugs 0.000 description 4
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 4
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 229920003169 water-soluble polymer Polymers 0.000 description 4
- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 description 3
- 235000021360 Myristic acid Nutrition 0.000 description 3
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 3
- 239000008116 calcium stearate Substances 0.000 description 3
- 235000013539 calcium stearate Nutrition 0.000 description 3
- HRBZRZSCMANEHQ-UHFFFAOYSA-L calcium;hexadecanoate Chemical compound [Ca+2].CCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCC([O-])=O HRBZRZSCMANEHQ-UHFFFAOYSA-L 0.000 description 3
- 150000001720 carbohydrates Chemical class 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 235000021552 granulated sugar Nutrition 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 3
- KAKVFSYQVNHFBS-UHFFFAOYSA-N (5-hydroxycyclopenten-1-yl)-phenylmethanone Chemical compound OC1CCC=C1C(=O)C1=CC=CC=C1 KAKVFSYQVNHFBS-UHFFFAOYSA-N 0.000 description 2
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 239000000783 alginic acid Substances 0.000 description 2
- 235000010443 alginic acid Nutrition 0.000 description 2
- 229920000615 alginic acid Polymers 0.000 description 2
- 229960001126 alginic acid Drugs 0.000 description 2
- 150000004781 alginic acids Chemical class 0.000 description 2
- 239000002280 amphoteric surfactant Substances 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000010446 mirabilite Substances 0.000 description 2
- 239000004006 olive oil Substances 0.000 description 2
- 235000008390 olive oil Nutrition 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001814 pectin Substances 0.000 description 2
- 235000010987 pectin Nutrition 0.000 description 2
- 229920003175 pectinic acid Polymers 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 229940114930 potassium stearate Drugs 0.000 description 2
- ANBFRLKBEIFNQU-UHFFFAOYSA-M potassium;octadecanoate Chemical compound [K+].CCCCCCCCCCCCCCCCCC([O-])=O ANBFRLKBEIFNQU-UHFFFAOYSA-M 0.000 description 2
- PYJBVGYZXWPIKK-UHFFFAOYSA-M potassium;tetradecanoate Chemical compound [K+].CCCCCCCCCCCCCC([O-])=O PYJBVGYZXWPIKK-UHFFFAOYSA-M 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000008159 sesame oil Substances 0.000 description 2
- 235000011803 sesame oil Nutrition 0.000 description 2
- 238000000235 small-angle X-ray scattering Methods 0.000 description 2
- BTURAGWYSMTVOW-UHFFFAOYSA-M sodium dodecanoate Chemical compound [Na+].CCCCCCCCCCCC([O-])=O BTURAGWYSMTVOW-UHFFFAOYSA-M 0.000 description 2
- 239000000176 sodium gluconate Substances 0.000 description 2
- 235000012207 sodium gluconate Nutrition 0.000 description 2
- 229940005574 sodium gluconate Drugs 0.000 description 2
- 229940082004 sodium laurate Drugs 0.000 description 2
- 229940045870 sodium palmitate Drugs 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- RSIJVJUOQBWMIM-UHFFFAOYSA-L sodium sulfate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=O RSIJVJUOQBWMIM-UHFFFAOYSA-L 0.000 description 2
- GGXKEBACDBNFAF-UHFFFAOYSA-M sodium;hexadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCC([O-])=O GGXKEBACDBNFAF-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229960001295 tocopherol Drugs 0.000 description 2
- 239000011732 tocopherol Substances 0.000 description 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 206010040880 Skin irritation Diseases 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000003254 anti-foaming effect Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 239000010685 fatty oil Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 150000004667 medium chain fatty acids Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
- 229940095696 soap product Drugs 0.000 description 1
- 239000008149 soap solution Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate group Chemical group S(=O)(=O)([O-])[O-] QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229940104261 taurate Drugs 0.000 description 1
- XOAAWQZATWQOTB-UHFFFAOYSA-N taurine Chemical compound NCCS(O)(=O)=O XOAAWQZATWQOTB-UHFFFAOYSA-N 0.000 description 1
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
- C11D17/08—Liquid soap, e.g. for dispensers; capsuled
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D13/00—Making of soap or soap solutions in general; Apparatus therefor
- C11D13/12—Cooling
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D9/00—Compositions of detergents based essentially on soap
- C11D9/007—Soaps or soap mixtures with well defined chain length
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D9/00—Compositions of detergents based essentially on soap
- C11D9/02—Compositions of detergents based essentially on soap on alkali or ammonium soaps
Definitions
- the present invention relates to a method for producing a soap composition containing higher fatty acid sodium and higher fatty acid potassium for skin cleansing, and in particular, it contains higher fatty acid sodium soap in a higher concentration than conventional soap compositions and can be produced at a low temperature. can maintain a paste-like or liquid state for a long period of time, has good usability, has high foaming power, is less irritating to the skin and eyes, and is environmentally friendly.
- the present invention relates to a method for producing a fatty acid potassium-containing soap composition.
- body cleansing soaps such as hair cleansers, skin cleansers, and facial cleansers.
- synthetic active agents such as carboxybetaine and alkylmethyl taurate are commercially available.
- fatty acid soaps have been in practical use for a long time, and the saponification method in which alkaline water is added to fats and oils and heating and the neutralization method in which alkaline water is added to fatty acids are generally used.
- fatty acid potassium salts obtained by neutralizing or saponifying fatty acids or oils with potassium hydroxide (hereinafter abbreviated as "potassium soap") are widely used as liquid body soaps containing fatty acid soaps as the main component. used.
- Some liquid potash soaps are distributed as liquid soaps diluted with water to a concentration that does not solidify or solidify.
- Patent Document 1 describes (a) 25 to 50% by mass of higher fatty acid soap, (b) 0.5 to 10% by mass of lower alcohol, and (c) water.
- Patent Document 2 describes a composition containing, as fatty acid soaps, myristic acid soap, palmitic acid soap and stearic acid soap in specific weight ratios, propylene glycol, glycerin and water. is proposed.
- Patent Document 3 describes (A) a higher fatty acid salt, (B) an amino acid-based polymer, and (C) two or more water-soluble polymers with different ionic properties (excluding component B).
- the fatty acid composition is obtained by reacting 1 mol of higher fatty acid containing 50% by mass or more of lauric acid with 1 to 1.01 mol of potassium hydroxide.
- the content of the higher fatty acid potassium salt (A) is 5 to 30% by mass
- the content of the alkylhydroxysulfobetaine type amphoteric surfactant (B) is 1 to 10% by mass
- (A): (B) is disclosed a clear liquid detergent composition having a weight ratio of 1:0.05-1.
- sodium soaps sodium salts of saturated fatty acids
- soap chips which are an industrial raw material, and after being heated in a kneader and mixed with additives, the viscous liquid is poured into a mold and processed into toilet soap and the like. Soap chips of sodium soap also have low solubility in water, and it is not easy to obtain its homogeneous dissolution even in warm water.
- liquid soaps that mainly contain potash soap do not have sufficient lathering and detergency.
- nonionic surfactants anionic surfactants, and amphoteric surfactants synthesized from petrochemical raw materials are used. etc. are used as a mixed prescription.
- polyhydric alcohols such as sorbitol, glycerin, propylene glycol, butylene glycol, polyalkylene glycol, and water-soluble polymer compounds are blended to improve foaming of the composition.
- Fatty acid soaps are not only safe for the human body, but also safe for the environment.
- potash soaps have the disadvantage of being weaker in foaming and detergency than synthetic surfactants, while sodium soap foams well and is comparable in detergency to synthetic surfactants, but has low solubility in water. The problem was that the
- sodium soap of lauric acid which has relatively excellent solubility in water among sodium salts of saturated fatty acids, should be about 40° C. or higher in order to dissolve 10% by mass or more.
- the Krafft point is above 30°C, and it loses fluidity even at low concentrations, and sodium soaps with longer carbon chains, such as palmitic acid and stearic acid, are even less soluble. (New Edition, Fatty Acid Chemistry, 2nd edition, edited by Jiro Hirano and Keiichi Inaba, Saiwai Shobo). Due to such low solubility, the obtained liquid soap product separates, or the nozzle of the container containing the liquid soap is clogged. Not commercialized.
- complex potash soap detergents containing synthetic activators can compensate for the weak detergency and foaming, they lack the feeling of use peculiar to fatty acid soaps, that is, good foam removal, etc., causing skin irritation and sliminess. There are indications that Therefore, it is desired to commercialize a body cleanser containing saturated fatty acid soap as a main component, which generates an abundant amount of mild and viscous foam on the skin, is comfortable to wash, does not have slimy feeling, and is refreshing and easy to rinse. .
- An object of the present invention is to provide a soap composition that contains a sodium higher fatty acid soap component at a high concentration and also contains a potassium fatty acid soap component, maintains a liquid or pasty state for a long period of time even at low temperatures, and does not separate the soap composition.
- a liquid or paste soap composition which is less irritating to the skin and eyes, environmentally friendly, has high foaming power and good detergency.
- Another object of the present invention is to provide a method for producing a soap composition containing higher fatty acid sodium and higher fatty acid potassium, which is a liquid or paste soap composition containing no synthetic active agent, with good productivity.
- "low temperature” means a temperature lower than 10°C.
- a mixed fatty acid containing a predetermined mixed fatty acid is used to cool the mixed fatty acid to a certain temperature difference with water, then heat it, and saponify it with an alkali of sodium and potassium to obtain a soap composition containing higher fatty acid sodium and higher fatty acid potassium that can solve the above problems.
- the inventors have found that production is possible, and arrived at the present invention.
- the first method of the present invention for producing a soap composition containing higher fatty acid sodium and higher fatty acid potassium contains a saturated fatty acid having 12 to 18 carbon atoms containing 85 to 100 mol % of saturated fatty acid having 12 and 14 carbon atoms.
- a mixed saturated fatty acid that does not contain saturated fatty acids with 8 to 10 carbon atoms is heated to 80 ° C. or higher to melt, and then a cooling liquid consisting of glycerin and water is added to the mixed saturated fatty acid. It is added at once and cooled to a temperature lower than the heating temperature by at least 20° C., then heated again and maintained at 40 to 55° C., and potassium hydroxide and / is added to the mixed fatty acid-containing liquid heated and maintained.
- a mixed alkali aqueous solution in which the molar ratio of potassium carbonate and sodium hydroxide and/or sodium carbonate is in the range of 90/10 to 30/70 is added at once, and the temperature is raised to 80 to 80 while stirring.
- the saturated fatty acid having 12 carbon atoms is contained in a larger amount than the saturated fatty acid having 14 carbon atoms. do.
- the second method of the present invention for producing a soap composition containing higher fatty acid sodium and higher fatty acid potassium contains a mixture of saturated fatty acids with 12 to 18 carbon atoms containing 80 to 90 mol % of saturated fatty acids with 12 and 14 carbon atoms.
- a mixture of a fatty acid containing no saturated fatty acid having 8 to 10 carbon atoms and 3 to 23 parts by mass of magnesium stearate or magnesium palmitate per 100 parts by mass of the mixed saturated fatty acid is heated at 80°C.
- a cooling liquid consisting of glycerin and water is added at once to the mixture of the mixed saturated fatty acid and magnesium stearate or magnesium palmitate and cooled to a temperature lower than the heating temperature by at least 20 ° C., and the glycerin is mixed. 30 to 75 parts by mass per 100 parts by mass of saturated fatty acid, After cooling, the mixture is warmed again and maintained at 40-55°C; A mixed alkali aqueous solution in which the molar ratio of potassium hydroxide and/or potassium carbonate and sodium hydroxide and/or sodium carbonate is in the range of 70/30 to 30/70 is added to the heated mixture.
- Soap composition containing higher fatty acid sodium and higher fatty acid potassium containing talc and sorbitol before or after the neutralization so that 3 to 13 parts by weight of talc and 50 to 180 parts by weight of sorbitol are contained in the soap composition. is a manufacturing method.
- the method for producing a liquid soap composition containing higher fatty acid sodium and higher fatty acid potassium of the present invention can maintain a uniform liquid state or paste state for a long period of time even at low temperatures, and the resulting soap composition separates over time.
- a transparent liquid soap composition or a paste soap composition which is excellent in stability without irritation, less irritating to the skin and eyes, has high foaming power and excellent feeling in use. It can be done.
- the liquid soap composition and paste soap composition obtained by the production method of the present invention contain a saturated fatty acid soap as a cleansing component and do not contain a surfactant. is also excellent.
- the present invention will be described based on the following preferred examples, but is not limited thereto.
- the method for producing a soap composition containing higher fatty acid sodium and higher fatty acid potassium according to the present invention is a method for preparing a soap composition capable of maintaining a liquid or pasty state for a long period of time even at low temperatures.
- the method for producing a transparent liquid soap composition according to the first aspect of the present invention is a mixed fatty acid composed of saturated fatty acids with 12 to 18 carbon atoms containing 85 to 100 mol % of saturated fatty acids with 12 and 14 carbon atoms. Then, a mixed saturated fatty acid containing no saturated fatty acid with 8 to 10 carbon atoms is heated to 80 ° C.
- a cooling liquid consisting of glycerin and water is added to the mixed saturated fatty acid at once to obtain the above Cooling to a temperature lower than the heating temperature by at least 20° C., then heating again and maintaining at 40 to 55° C., adding potassium hydroxide and/or potassium carbonate to the mixed fatty acid-containing liquid heated and maintained;
- a mixed alkali aqueous solution in which the molar ratio of sodium hydroxide and/or sodium carbonate is in the range of 90/10 to 30/70 is added at once, and the temperature is raised while stirring and maintained at 80 to 95°C.
- a method for producing a liquid soap composition comprising neutralizing with water to prepare a liquid soap composition.
- the fatty acid used in the method for producing the liquid soap composition of the present invention is a mixed saturated fatty acid composed of saturated fatty acids with 12 to 18 carbon atoms containing 85 to 100 mol % of saturated fatty acids with 12 and 14 carbon atoms. Saturated fatty acids with 8 or 10 carbon atoms are not included. This is because if the saturated fatty acid having 8 or 10 carbon atoms is contained, the long-term stability of the liquid soap composition at low temperature, which maintains the liquid state for a long period of time, becomes unstable. No unsaturated fatty acids are used in the present invention. This is because if the soap contains unsaturated fatty acids, it is not suitable for washing the skin because the soap will develop a color and smell due to oxidation.
- Lauric acid, myristic acid, palmitic acid and stearic acid are preferably used as mixed fatty acids composed of saturated fatty acids having 12 to 18 carbon atoms, preferably 12 to 16 carbon atoms, used in the production method of the present invention.
- Use mixed fatty acids Use mixed fatty acids.
- a mixed fatty acid of a plurality of saturated fatty acids is desirable from the viewpoint of low odor and color stability over time.
- the total mixed fatty acid of these saturated fatty acids contains 85 to 100 mol %, preferably 88 to 98 mol % of saturated fatty acids having 12 and 14 carbon atoms.
- saturated fatty acids with 12 and 14 carbon atoms By blending saturated fatty acids with 12 and 14 carbon atoms, lauric acid and myristic acid in the total mixed fatty acid at the above-mentioned high content, it foams well and can maintain a transparent liquid state for a long time in a low temperature range. becomes.
- it is desirable that the saturated fatty acid with 12 carbon atoms is blended in a larger amount than the saturated fatty acid with 14 carbon atoms.
- the mixed saturated fatty acid is stirred and heated to a temperature of 80° C. or higher, preferably 90° C. or higher, more preferably 80 to 95° C. (heating temperature) to homogenize the mixed saturated fatty acid.
- melt to Melting is preferably carried out with stirring.
- the heating temperature means the maximum heating temperature at which the mixed saturated fatty acid is heated and melted homogeneously.
- the holding time at the heating temperature is not particularly limited as long as the mixed fatty acid can be uniformly dissolved, but for example, holding for about 20 to 60 minutes is exemplified.
- a cooling liquid is added to the mixed fatty acid all at once to lower the temperature by at least 20°C, preferably 25°C or more, than the heating temperature. Cool to temperature (cooling temperature). For example, it is cooled to 60° C. or lower, more preferably 50° C. or lower. A mixture of the mixed saturated fatty acid and the cooling liquid, which is cooled by adding the cooling liquid, exhibits a state in which small white particles are suspended.
- the amount of the cooling liquid to be added is 80° C. or higher, preferably 90° C. or higher, and the heating temperature of the mixed fatty acid melted by adding the cooling liquid at once is 70° C. or lower, preferably 60° C. or lower. , more preferably 50°C or less, and it is sufficient that the temperature is at least 20°C or more, preferably 25°C or more, lower than the heating temperature.
- the coolant contains glycerin and purified water.
- glycerin in the coolant is preferably 15 to 30 parts by mass, more preferably 15 to 22 parts by mass, with respect to 100 parts by mass of mixed fatty acids
- purified water is preferably 100 to 250 parts by mass, more preferably is 115 to 200 parts by mass, and by adding a cooling liquid that is a mixture of glycerin and purified water in such a ratio, it is cooled to a cooling temperature lower than the above heating temperature by at least 20 ° C., preferably 25 ° C. or more. can be done.
- the mixed saturated fatty acid-containing liquid at the cooling temperature is heated again and maintained at the heating control temperature of 40 to 55°C.
- the resulting liquid soap composition can maintain long-term stability (transparency and liquid state retention performance) at low temperatures, and can also be excellent in foamability.
- a mixed alkali is added at once to the mixed fatty acid-containing liquid maintained at the heating control temperature, and the mixture is heated with stirring and maintained at 80 to 95° C. for neutralization to prepare a liquid soap composition. .
- the mixed fatty acid-containing liquid is mixed and rapidly cooled, then heated again and maintained at the heating control temperature.
- Alkali is added to the mixed fatty acid-containing liquid, and the temperature is raised to 80 to 95° C. while stirring for neutralization. By doing so, the resulting liquid soap composition can retain its liquid state for a long period of time and maintain its transparency even at low temperatures.
- the alkali used for neutralizing the mixed saturated fatty acid to obtain the fatty acid soap is a mixed alkali of potassium hydroxide and/or potassium carbonate and sodium hydroxide and/or sodium carbonate.
- the mixing molar ratio of potassium carbonate and sodium hydroxide and/or sodium carbonate is 90/10 to 30/70, preferably 80/20 to 60/40.
- purified water may be added to the mixed alkali in order to suppress the increase in viscosity during the neutralization reaction and the local generation of heat of neutralization.
- Such potassium hydroxide and/or potassium carbonate and sodium hydroxide and/or sodium carbonate may be mixed in advance to prepare a mixed alkali and then used for neutralization, or may be used for neutralization without being mixed in advance. Alkali may be blended and used. If the molar ratio of potassium hydroxide and/or potassium carbonate is higher than 90, the effect of potassium soap becomes strong, and the foaming and detergency are not satisfactory. As a result, the hardness of the obtained soap increases and it is no longer liquid, and it does not dissolve quickly in water when used, resulting in low foamability.
- the obtained liquid soap composition may not be transparent.
- the temperature is raised to 80 to 90°C.
- Examples of fatty acid soaps obtained by saponifying mixed fatty acids and mixed alkalis include potassium/sodium laurate mixed salt, potassium/sodium myristate mixed salt, potassium/sodium palmitate mixed salt, and potassium stearate. / sodium mixed salts, etc., and potassium laurate / sodium mixed salts and potassium myristate / sodium myristate mixed salts are always included, and two or more of the above mixed salts can be used in combination. It is desirable from the point of being able to produce a liquid soap that is strong and foams well.
- the liquid soap composition obtained by the method of the present invention contains, for example, 8 to 35% by mass, preferably 10 to 35% by mass, more preferably 18 to 28% by mass of saturated fatty acid soap. This is because a more sufficient foam volume can be obtained and a homogeneous liquid soap composition can be more maintained.
- the transparent liquid soap composition thus obtained by the production method of the present invention contains water, which is the water for cooling, the water contained in each raw material, the saturated fatty acid and the alkali. This corresponds to the water generated by the neutralization of the liquid soap composition, for example, 92 to 65% by weight, preferably 82 to 72% by weight. By adjusting the amount of water contained so as to fall within this range, more satisfactory foaming properties can be obtained during use.
- the liquid soap composition obtained by the production method of the present invention can be a liquid soap composition having excellent long-term liquid retention performance and transparency at low temperatures, as measured by the method described in the Examples below. It is.
- the transparent liquid soap composition obtained by the production method of the present invention was measured by small angle X-ray scattering (SAXS) using SPring-8 of RIKEN, Hyogo Prefecture.
- SAXS small angle X-ray scattering
- the soap micelles in the aqueous solution had an average particle size of 50 nm or less, which was fine, which proved that the soap solution remained transparent.
- Oily components such as natural fats and oils, silicone derivatives such as polyoxyethylene alkyl-modified dimethylsilicone, natural water-soluble polymers such as pectin and alginic acid, biodegradable chelating agents such as sodium gluconate, various natural extracts derived from animals and plants Inorganic salts such as sodium chloride, Glauber's salt, etc., natural antioxidants such as d-tocopherol, natural pigments, natural perfumes, etc. are optionally added within the range that does not impair the effects of the present invention. can be blended into
- the second method of the present invention for producing a soap composition containing higher fatty acid sodium and higher fatty acid potassium contains a mixture of saturated fatty acids with 12 to 18 carbon atoms containing 80 to 90 mol % of saturated fatty acids with 12 and 14 carbon atoms.
- a mixture of a fatty acid containing no saturated fatty acid having 8 to 10 carbon atoms and 3 to 23 parts by mass of magnesium stearate or magnesium palmitate per 100 parts by mass of the mixed saturated fatty acid is heated at 80°C.
- a cooling liquid consisting of glycerin and water is added at once to the mixture of the mixed saturated fatty acid and magnesium stearate or magnesium palmitate and cooled to a temperature lower than the heating temperature by at least 20 ° C., and the glycerin is mixed. 30 to 75 parts by mass per 100 parts by mass of saturated fatty acid, After cooling, the mixture is warmed again and maintained at 40-55°C; A mixed alkali aqueous solution in which the molar ratio of potassium hydroxide and/or potassium carbonate and sodium hydroxide and/or sodium carbonate is in the range of 70/30 to 30/70 is added to the heated mixture.
- Soap composition containing higher fatty acid sodium and higher fatty acid potassium containing talc and sorbitol before or after the neutralization so that 3 to 13 parts by weight of talc and 50 to 180 parts by weight of sorbitol are contained in the soap composition. is a manufacturing method.
- the fatty acid used in the method for producing the paste soap composition of the present invention is a mixed saturated fatty acid composed of saturated fatty acids with 12 to 18 carbon atoms containing 80 to 90 mol % of saturated fatty acids with 12 and 14 carbon atoms.
- Saturated fatty acids with 8 or 10 carbon atoms are not included, because if saturated fatty acids with 8 or 10 carbon atoms are included, the stability of the long-term paste state retention performance of the paste-like soap composition at low temperatures is unstable. Because it becomes No unsaturated fatty acids are used in the present invention. This is because if the soap contains unsaturated fatty acids, it is not suitable for washing the skin because the soap will develop a color and smell due to oxidation.
- Lauric acid, myristic acid, palmitic acid and stearic acid are used as the mixed fatty acid composed of saturated fatty acids having 12 to 18 carbon atoms, preferably 12 to 16 carbon atoms, used in the production method of the present invention.
- a mixed fatty acid is used in which multiple fatty acids containing are mixed.
- a mixed fatty acid of a plurality of saturated fatty acids is desirable from the viewpoint of low odor and color stability over time.
- the total mixed fatty acid of these saturated fatty acids contains 80 to 90 mol %, preferably 82 to 88 mol % of saturated fatty acids having 12 and 14 carbon atoms.
- saturated fatty acids having 12 and 14 carbon atoms such as lauric acid and myristic acid
- the saturated fatty acid with 14 carbon atoms is contained in a larger amount than the saturated fatty acid with 12 carbon atoms.
- magnesium stearate or magnesium palmitate is blended with the mixed fatty acid.
- Such magnesium stearate or magnesium palmitate is preferably blended in advance with the mixed saturated fatty acid, and is blended in a proportion of 3 to 23 parts by mass, preferably 8 to 16 parts by mass, per 100 parts by mass of the mixed saturated fatty acid. be.
- the fluidity of the paste soap composition may increase. Although the fluidity of the product is reduced, the texture of the paste becomes rough, which is not desirable.
- the obtained paste-like soap composition can maintain the paste state for a long time even at low temperatures, and has the effect of suppressing hardening at low temperatures.
- the paste soap composition prepared by the method of the present invention does not contain calcium stearate or calcium palmitate, and calcium stearate or calcium palmitate can be used as a substitute for magnesium stearate or magnesium palmitate. can't. This is because calcium stearate or calcium palmitate makes it difficult for the paste soap composition to retain its paste state performance for a long period of time in a low temperature range.
- the mixture containing the mixed saturated fatty acid and magnesium stearate or magnesium palmitate is stirred and heated to a temperature of 80° C. or higher, preferably 90° C. or higher, more preferably 80 to 95° C. (heated temperature) to homogeneously melt the mixed saturated fatty acids. Melting is preferably carried out with stirring.
- the heating temperature means the maximum heating temperature at which the mixed saturated fatty acid is heated and melted homogeneously.
- the holding time at the heating temperature is not particularly limited as long as the mixed fatty acid can be uniformly dissolved, the holding time is, for example, 20 to 60 minutes.
- talc in an amount of 3 to 13 parts by mass, more preferably 5 to 10 parts by mass, based on 100 parts by mass of the mixed saturated fatty acid.
- Talc may be mixed in advance when the mixed fatty acid is prepared, may be mixed with magnesium stearate or the like in the mixed fatty acid, or may be added and mixed after the neutralization treatment described below.
- saccharides it is desirable to add 2 to 12 parts by mass, preferably 2 to 8 parts by mass, of saccharides to 100 parts by mass of mixed saturated fatty acids.
- sugars include commercially available sugars such as granulated sugar.
- saccharides By including saccharides, the pasty soap composition retains its paste state more effectively even in a low temperature range, which is desirable because it has the effect of suppressing hardening.
- the saccharide may be mixed in advance when preparing the mixed fatty acid, may be mixed with magnesium stearate or the like into the mixed fatty acid, or may be added and mixed after the neutralization treatment described later. Adding and blending later is more desirable.
- a cooling liquid is added at once to lower the temperature. Cool to a temperature lower than the heating temperature by at least 20° C., preferably 25° C. or more (cooling temperature). For example, it is cooled to 60° C. or lower, more preferably 50° C. or lower. A mixture of the mixed saturated fatty acid or the like and the cooling liquid, which is cooled by adding the cooling liquid, presents a state in which small white particles are suspended.
- the amount of the cooling liquid to be added is 80° C. or higher, preferably 90° C. or higher, and the heating temperature of the liquid mixed fatty acid melted is 70° C. or lower, preferably 60° C. by adding the cooling liquid at once. It suffices if it can be cooled to a temperature lower than the heating temperature by at least 20° C. or more, preferably 25° C. or more.
- a cooling liquid at room temperature for example, about 20° C. can be used for blending.
- the coolant contains glycerin and purified water.
- Glycerin in the cooling liquid is preferably 30 to 75 parts by mass, more preferably 45 to 65 parts by mass, with respect to 100 parts by mass of mixed fatty acids, and purified water is preferably 90 to 250 parts by mass, more preferably 90 parts by mass.
- 150 parts by mass for example, by adding a cooling liquid that is a mixed liquid of glycerin and purified water in such a ratio, it is possible to cool to a cooling temperature that is at least 20° C. lower than the above heating temperature.
- the paste-like soap composition of the present invention contains sorbitol, and the sorbitol may be added to the cooling liquid in advance or may be added after partial neutralization.
- the amount of sorbitol compounded is 50 to 200 parts by mass, preferably 50 to 150 parts by mass, per 100 parts by mass of the mixed fatty acid.
- the liquid containing mixed saturated fatty acids, etc., at the cooling temperature is heated again and maintained at the heating control temperature of 40 to 55°C.
- the resulting paste-like soap composition can maintain long-term stability (paste-like retention performance) at low temperatures.
- the mixed alkali is added all at once to the liquid (mixture) containing the mixed fatty acid, etc., which is maintained at the heating control temperature, and the temperature is raised while stirring and held at 80 to 95° C. for neutralization, resulting in a paste-like soap.
- a composition is prepared. In this way, it is obtained by adding an alkali to the mixed fatty acid-containing liquid that has been rapidly cooled and then heated again and maintained at the heating control temperature, and neutralizing by raising the temperature to 80 to 95 ° C. while stirring. Even if the paste soap composition is at a low temperature, it becomes possible to maintain the paste form for a long period of time.
- the alkali used for neutralizing the cooled mixed saturated fatty acid to obtain the fatty acid soap is a mixed alkali of potassium hydroxide and/or potassium carbonate and sodium hydroxide and/or sodium carbonate.
- the mixing molar ratio of potassium oxide and/or potassium carbonate and sodium hydroxide and/or sodium carbonate is 70/30 to 30/70, preferably 60/40 to 50/50.
- purified water to the mixed alkali in order to improve the viscosity during the neutralization reaction and to suppress the local generation of heat of neutralization.
- Such potassium hydroxide and/or potassium carbonate and sodium hydroxide and/or sodium carbonate may be blended in advance to prepare a mixed alkali and used for neutralization, or may be blended at the time of neutralization without being blended in advance. It can be used either way. If the molar ratio of potassium hydroxide and/or potassium carbonate is higher than 70, the effect of potassium soap becomes strong, and the foaming and detergency are not satisfactory. As a result, the hardness of the obtained soap increases and it is no longer liquid, and it does not dissolve quickly in water when used, resulting in low foamability.
- Examples of fatty acid soaps obtained by saponifying mixed fatty acids and mixed alkalis include potassium/sodium laurate mixed salt, potassium/sodium myristate mixed salt, potassium/sodium palmitate mixed salt, and potassium stearate. / sodium mixed salts, etc., and potassium laurate / sodium mixed salts and potassium myristate / sodium myristate mixed salts are always included, and two or more of the above mixed salts can be used in combination. It is desirable from the point of being able to produce a pasty soap that is smooth and foams well.
- the paste soap composition obtained by the method of the present invention desirably contains, for example, 8 to 35% by mass, preferably 10 to 35% by mass, more preferably 18 to 28% by mass of saturated fatty acid soap. This is because within such a range, a more sufficient foam volume can be obtained during use, and a more homogeneous pasty soap composition can be obtained.
- the paste-like soap composition thus obtained by the production method of the present invention contains water, which is obtained by neutralizing the added water and the water contained in each raw material, the fatty acid, and the alkali.
- This corresponds to water generated and the like, and can be exemplified by 28 to 65% by weight, preferably 35 to 50% by weight, in the paste soap composition.
- As the weight ratio of potassium hydroxide/sodium hydroxide increases from 70/30 to 30/70, it is necessary to contain more water.
- the proportion of sodium hydroxide used increases, the concentration of the fatty acid sodium salt produced by saponification increases.
- the water content exceeds 65% by weight, it becomes difficult to obtain satisfactory foamability and foam volume during use, while if it is less than 28% by weight, curing at low temperatures may occur.
- the water content is adjusted within this range, it becomes a suitable and easy-to-use paste even in a low temperature range, the viscosity is within the appropriate range, it does not have fluidity such as flowing out, and it may harden and solidify. It is desirable to be able to obtain a paste-like soap composition without
- the soap composition that is finally obtained is preferably in the form of a paste having a viscous maximum load of 200 to 3499 g/cm 2 at 5°C measured under the following conditions.
- 200 to 999 g/cm 2 is desirable as a paste state.
- those with a maximum load of 100 to 199 g/cm 2 are evaluated as a milky lotion, and those with a maximum load of 99 g/cm 2 or less are evaluated as a liquid in the present invention.
- Viscosity was measured by applying a 20 ml polypropylene syringe (cosmetic S-refill container No.
- Fatty acid polyvalent metal salt/magnesium stearate trade name Daiwax M, manufactured by Dainichi Chemical Industry Co., Ltd.
- Alcohols/glycerin (Wako first class: manufactured by Wako Pure Chemical Industries, Ltd.)
- Sorbitol trade name NEOSORB70/70 manufactured by Shinko Science Corporation (70% aqueous solution)
- Sugar Mitsubishi Chemical Co., Ltd. granulated sugar
- Talc Product name SWA-A TALC Asada Flour Milling Co., Ltd.
- Purified water Product name Japanese Pharmacopoeia Purified water Kosakai Pharmaceutical Co., Ltd.
- MCT medium chain fatty acid triglyceride; oil
- Product name Nisshin MCT Oil HC 100% Nisshin Oilio Group Co., Ltd.
- Squalane Ogi Kaseihin Co., Ltd.
- Liquid soap compositions (Examples 1-9, Comparative Examples 1-10) Mixed fatty acids were prepared by mixing each of the above fatty acids at the mixing ratios shown in Tables 1 and 2 below. Next, the mixed fatty acid was charged into a 1 L flask equipped with a stirrer, a thermometer and a dropping funnel, heated while stirring, and at each heating temperature (a) shown in Tables 1 and 2, the mixed fatty acid was Stirring was maintained for 20 to 60 minutes so that everything melted and became uniformly liquid. The melted mixed fatty acid was transparent. In Comparative Example 5, a liquid obtained by mixing purified water and glycerin was premixed with mixed fatty acid, and the mixed liquid was heated to the temperature shown in Tables 1 and 2 (heating temperature (a)).
- Purified water and glycerin were mixed at the ratios shown in Tables 1 and 2 to prepare each coolant. While stirring the liquid mixed fatty acid at each heating temperature, a cooling liquid at room temperature of about 20 ° C. is added to the mixed fatty acid at once to rapidly cool it, and the temperature of the mixed liquid of the mixed fatty acid and the cooling liquid in the flask is increased. The mixture was cooled to each cooling temperature (b) shown in Tables 1 and 2 and further stirred for about 5 minutes to obtain a white liquid dispersion in a suspended state. The liquid dispersion was then heated to a heating control temperature (c) of 40-50° C. and maintained.
- a heating control temperature c
- Comparative Example 5 a mixed liquid obtained by mixing 172 parts by mass of purified water (parts by mass/100 parts by mass of mixed fatty acid) and 21 parts by mass of glycerin (parts by mass/100 parts by mass of mixed fatty acid) was mixed with the mixed fatty acid in advance. It is not used as a coolant. Therefore, there is no cooling step, and for the sake of convenience, the cooling temperature (b) and heating control temperature (c) columns indicate the temperature after stirring for about 5 minutes at the heating temperature.
- a mixed alkaline aqueous solution prepared by previously mixing a 48% potassium hydroxide aqueous solution and/or a 48% sodium hydroxide aqueous solution (Tables 1 and 2) was added at once to the flask containing the dispersion. , neutralization (saponification) was carried out with stirring.
- the mixed alkali concentration (%) is ((48% KOH (g) + 48% NaOH (g)) x 0.48) (48% KOH (g) + 48% NaOH (g) + dilution water (g) indicates the alkalinity concentration divided by .
- the neutralization solution (saponification solution) in the flask was heated again while stirring so that it would not bubble and was heated to the elevated temperature (d) shown in Tables 1 and 2 for about 30 minutes. Aging was performed while holding. After aging, the resulting composition was allowed to cool at room temperature to obtain a soap composition.
- Test Example 1 Transparency and liquid stability at room temperature (model number TEST-F25-100, AGC Techno Glass) until the height reaches 75 mm so as not to foam, tightly stoppered, and allowed to stand in a 25 ° C. or 5 ° C. °C, the flat-bottomed test tube was visually observed vertically (upper) and laterally to evaluate the transparency. In addition, the evaluation was visually confirmed that there were no white lumps, white precipitates, turbidity, or separation, and further observation was made from the top (vertical direction) of the flat-bottomed test tube, and Mincho's water was placed at the bottom of the test tube. If the characters in the 8 point font were clearly readable, they were evaluated as having transparency and were evaluated as "transparent", and the results are shown in Tables 1 and 2.
- Test Example 2 Liquid Retaining Performance/Transparency (Model No. TEST-F25-100, AGC Techno Glass) to a height of 75 mm so as not to foam, tightly stoppered, and allowed to stand in a constant temperature bath at 5° C. for one week. After standing for one week, the liquid retention performance was visually evaluated, and the transparency of the flat-bottomed test tube vertically (top) and horizontally was visually evaluated.
- evaluation determined the stability at 5 degreeC (after 1 week) as follows.
- Table 3 shows the results. ⁇ By visual inspection, if a white solid is deposited or solidification is observed, it does not have the ability to retain the liquid state and the transparency is poor ( ⁇ ). ⁇ Visually, there are no white lumps, white precipitates, turbidity, or separations, and furthermore, from the top of the flat-bottom test tube (vertical direction), 8 points of Mincho font installed at the bottom of the test tube If the characters are clearly readable, the transparency is good, and the liquid is liquid according to the test example 4 below ( ⁇ )
- each test tube is again immersed in a constant temperature water bath, and after standing for 5 minutes, as a foaming test after 5 minutes, the liquid surface height and the highest height of the foam are measured. bottom. The same operation was performed in all three test tubes, and the average value of the liquid surface and foam height was calculated to determine the foamability of each fatty acid soap composition. Table 3 shows the results.
- the evaluation result was as follows. ⁇ If the height of the foam measured after 5 minutes is 30 mm or more, the foaming property is high ( ⁇ ). ⁇ When the height of the foam part is less than 20 mm, the foaming property is low ( ⁇ ) ⁇ If the height of the foam part is 20 mm or more and less than 30 mm, the foaming property is medium ( ⁇ ).
- Examples 10-20, Comparative Examples 11-20 Mixed fatty acids were prepared by mixing each of the above fatty acids at the mixing ratios shown in Tables 4 and 6 below.
- the mixed fatty acid was mixed with magnesium stearate and talc at the mixing ratios shown in Tables 4 and 6 below (mixture of mixed fatty acid, etc.).
- a 1 L flask equipped with a stirrer, a thermometer and a dropping funnel is charged with the mixed fatty acid mixture, etc., heated while stirring, and mixed at each heating temperature (a) shown in Tables 5 and 7. All fatty acids were melted and held under stirring for 20-60 minutes.
- Glycerin and sorbitol (the numerical values of sorbitol in Tables 4 and 6 represent the actual mass parts of sorbitol, not the mass parts of the aqueous sorbitol solution) to purified water in the proportions shown in Tables 4 and 6. were mixed to prepare each coolant. While stirring the mixed fatty acid mixture at each heating temperature, a cooling liquid of about 20° C. is added to the mixed fatty acid mixture at once to quench it, and the mixture of the mixed fatty acid mixture and the cooling liquid in the flask was set to each cooling temperature (b) shown in Tables 5 and 7, and the mixture was further stirred for about 5 minutes so as to become homogeneous to obtain a white suspension liquid dispersion. The dispersion was then heated to and maintained at the heating control temperature (c) shown in Tables 5 and 7.
- a mixed alkaline aqueous solution prepared by previously mixing a 48% potassium hydroxide aqueous solution and/or a 48% sodium hydroxide aqueous solution (Tables 5 and 7) in a flask containing each of the above dispersions at a heating control temperature was added at once and neutralized (saponified) while stirring.
- the mixed alkali concentration (%) is ((48% KOH (g) + 48% NaOH (g)) x 0.48) (48% KOH (g) + 48% NaOH (g) + dilution water (g) indicates the alkalinity concentration divided by .
- Example 5 Foamability
- each test tube is again immersed in a constant temperature water bath, and after standing for 5 minutes, as a foaming test after 5 minutes, the liquid surface height and the highest height of the foam are measured. bottom. The same operation was performed in all three test tubes, and the average value of the liquid surface and foam height was calculated to determine the foamability of each fatty acid soap composition.
- the evaluation result was as follows. ⁇ If the height of the foam measured after 5 minutes is 30 mm or more, the foaming property is high ( ⁇ ). ⁇ When the height of the foam part is less than 20 mm, the foaming property is low ( ⁇ ) ⁇ If the height of the foam part is 20 mm or more and less than 30 mm, the foaming property is medium ( ⁇ ). The results obtained are shown in Table 9 below.
- liquid soap composition and paste soap composition prepared by the method for producing a soap composition containing sodium sub-fatty acid and potassium higher fatty acid according to the present invention maintain their liquid or pasty state even in cold regions and in winter. Therefore, it is convenient to use and can be effectively applied for washing the skin of the face and body.
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Abstract
Description
特に、脂肪酸石鹸が主成分である液状身体石鹸には、脂肪酸または油脂を水酸化カリウムによって中和または鹸化して得られる脂肪酸カリウム塩(以下、「カリ石鹸」と略記する)が液状石鹸として広く用いられている。かかる液状カリ石鹸は、凝固したり、固結したりしない濃度まで水で希釈されて液状石鹸として流通しているものもある。
また、特開2002-322498号公報(特許文献2)には、脂肪酸石鹸として、特定の重量比のミリスチン酸石鹸、パルミチン酸石鹸及びステアリン酸石鹸と、プロピレングリコール、グリセリン及び水を含有する組成物が提案されている。
更に、特開2011-121870号公報(特許文献4)には、(A)硫酸基を有するアニオン性界面活性剤を1~10質量%、(B)高級脂肪酸又はその塩を1~25質量%、(C)アクリル酸・メタクリル酸アルキル共重合体を0.1~2質量%、(D)(ジ)グリセリンモノ脂肪酸エステル又は(ジ)グリセリンモノアルキルエーテルを0.5~10質量%、(E)アルキルポリグルコシドを0.5~10質量%、(F)水を含有し、30℃における粘度が150~1000dPa・sである皮膚洗浄剤が提案されている。
しかし、上記したように、カリ石鹸は泡立ちや洗浄力が合成活性剤に比べて弱いことが難点とされ、一方でナトリウム石鹸は泡立ちが良く洗浄力も合成活性剤に匹敵するが、水への溶解度が小さいことが問題であった。
かかる溶解性の低さにより、得られる液状石鹸製品が分離したり、液状石鹸を入れた容器のノズルの詰まり等が発生してしまい、現状ではナトリウム石鹸を主成分とする液状脂肪酸石鹸組成物は商品化されていない。
従って、皮膚にマイルドでかつ粘性のある泡を豊富に発生し、洗い心地が良く、ヌメリ感なく、さっぱりとしたすすぎ易い飽和脂肪酸石鹸を主成分とする身体洗浄剤の製品化が望まれている。
なお、本発明において、「低温」とは10℃より低い温度を表すものとする。
次いで、当該混合飽和脂肪酸とステアリン酸マグネシウム又はパルミチン酸マグネシウムとの混合物に、グリセリン及び水からなる冷却液を一度に加えて前記加温温度より少なくとも20℃以上低い温度に冷却し、当該グリセリンは混合飽和脂肪酸100質量部に対して30~75質量部で配合され、
前記冷却後に前記混合物を再び加温して40~55℃に保持し、
該加温保持された混合物に、水酸化カリウム及び/又は炭酸カリウムと、水酸化ナトリウム及び/又は炭酸ナトリウムとのモル比が70/30~30/70の範囲で混合された混合アルカリの水溶液を一度に加えて、攪拌しながら昇温して80~95℃に保持して中和して、ペースト状石鹸組成物を調製し、該ペースト状石鹸組成物中に、前記混合飽和脂肪酸100質量部に対して3~13質量部のタルク及び50~180質量部のソルビトールが含まれるように、前記中和前又は中和後にタルク及びソルビトールを配合する、高級脂肪酸ナトリウム及び高級脂肪酸カリウム含有石鹸組成物の製造方法である。
また、本発明の製造方法により得られた液状石鹸組成物及びペースト状石鹸組成物は、飽和脂肪酸石鹸分を洗浄成分とし界面活性剤を含むことがないため、皮膚への刺激が少なく、環境的にも優れている。
本発明の高級脂肪酸ナトリウム及び高級脂肪酸カリウム含有石鹸組成物の製造方法は、低温においても長期に液状又はペースト状保持性能を維持することができる石鹸組成物を調製することができる方法であり、特に本発明の第1の発明の透明な液状石鹸組成物の製造方法は、炭素数12及び14の飽和脂肪酸を85~100モル%含む炭素数12~炭素数18の飽和脂肪酸よりなる混合脂肪酸であって、炭素数8~10の飽和脂肪酸を含まない混合飽和脂肪酸を、80℃以上に加温して溶融し、次いで、当該混合飽和脂肪酸に、グリセリン及び水からなる冷却液を一度に加えて前記加温温度より少なくとも20℃以上低い温度に冷却し、その後再び加温して40~55℃に保持し、該加温保持された混合脂肪酸含有液に、水酸化カリウム及び/又は炭酸カリウムと、水酸化ナトリウム及び/又は炭酸ナトリウムとのモル比が90/10から30/70の範囲で混合された混合アルカリの水溶液を一度に加えて、攪拌しながら昇温して80~95℃に保持して中和して、液状石鹸組成物を調製する、液状石鹸組成物の製造方法である。
本発明の製造方法においては、化学合成された界面活性剤や粘性剤は配合されない。
本発明においては、不飽和脂肪酸は使用しない。不飽和脂肪酸を含むとその石鹸は酸化により色味や匂いが発生するため、皮膚洗浄用には適切ではないからである。
本発明の製造方法に用いる炭素数12~18、好ましくは炭素数12~16の飽和脂肪酸からなる混合脂肪酸としては、ラウリン酸、ミリスチン酸、パルミチン酸及びステアリン酸が好ましく用いられ、複数の脂肪酸が混合された混合脂肪酸を使用する。
複数の飽和脂肪酸の混合脂肪酸とすることが低臭気性、色相の経時安定性の点から望ましい。
全混合脂肪酸中に炭素数12及び14の飽和脂肪酸、ラウリン酸とミリスチン酸を上記高含量で配合することで、泡立ちが良好で、且つ透明な液状状態を低温域で長期間保持することが可能となる。
また、望ましくは、炭素数12の飽和脂肪酸は、炭素数14の飽和脂肪酸よりも多く配合されることが望ましく、これは上記液状石鹸組成物の効果を更に有効に発現できるからである。
冷却液を加えて冷却した混合飽和脂肪酸と冷却液との混合物は、白色の小さな粒子が懸濁した状態を呈している。
例えば、冷却液中のグリセリンは、混合脂肪酸100質量部に対して、好ましくは15~30質量部、より好ましくは15~22質量部であり、精製水は好ましくは100~250質量部、より好ましくは115~200質量部であり、かかる割合のグリセリンと精製水との混合液である冷却液を添加することで上記加温温度から少なくとも20℃、好ましくは25℃以上低い冷却温度に冷却することができる。
混合飽和脂肪酸を中和して脂肪酸石鹸を得るために使用するアルカリは、水酸化カリウム及び/又は炭酸カリウムと、水酸化ナトリウム及び/又は炭酸ナトリウムとの混合アルカリであり、かかる水酸化カリウム及び/又は炭酸カリウムと、水酸化ナトリウム及び/又は炭酸ナトリウムとの混合モル比の割合は90/10~30/70、好ましくは80/20~60/40である。
水酸化カリウム及び/又は炭酸カリウムのモル比率が90より高くなってしまうと、カリウム石鹸の影響が強くなり、泡立ちや洗浄力等が満足できるものではなく、また30より水酸化カリウムの比率が低くなると、得られる石鹸の硬度が上昇して液状でなくなるとともに、使用時に水に早く溶けず起泡性が低くなることがある。
また、混合脂肪酸の中和には、前記両アルカリを予めアルカリ水溶液(例えば、有効分濃度48%を基準)とし、これを中和に用いることも可能であり、これにより短時間で均一な溶液を得ることが可能となる。
なお、本発明の製造方法により得られる透明な液状石鹸組成物を、兵庫県RIKENのSPring-8により小角X線散乱(SAXS)にて測定した。水溶液中での石鹸ミセルの平均粒径は50nm以下で微細であり、透明状態を保持する石鹸溶液であることが裏付けられた。
次いで、当該混合飽和脂肪酸とステアリン酸マグネシウム又はパルミチン酸マグネシウムとの混合物に、グリセリン及び水からなる冷却液を一度に加えて前記加温温度より少なくとも20℃以上低い温度に冷却し、当該グリセリンは混合飽和脂肪酸100質量部に対して30~75質量部で配合され、
前記冷却後に前記混合物を再び加温して40~55℃に保持し、
該加温保持された混合物に、水酸化カリウム及び/又は炭酸カリウムと、水酸化ナトリウム及び/又は炭酸ナトリウムとのモル比が70/30~30/70の範囲で混合された混合アルカリの水溶液を一度に加えて、攪拌しながら昇温して80~95℃に保持して中和して、ペースト状石鹸組成物を調製し、該ペースト状石鹸組成物中に、前記混合飽和脂肪酸100質量部に対して3~13質量部のタルク及び50~180質量部のソルビトールが含まれるように、前記中和前又は中和後にタルク及びソルビトールを配合する、高級脂肪酸ナトリウム及び高級脂肪酸カリウム含有石鹸組成物の製造方法である。
第2の本発明の製造方法においても、第1の本発明の製造方法と同様に、化学合成された界面活性剤や粘性剤は配合されないものである。
本発明においては、不飽和脂肪酸は使用しない。不飽和脂肪酸を含むとその石鹸は酸化により色味や匂いが発生するため、皮膚洗浄用には適切ではないからである。
本発明の製造方法に用いる炭素数12~18、好ましくは炭素数12~16の飽和脂肪酸からなる混合脂肪酸としては、ラウリン酸、ミリスチン酸、パルミチン酸及びステアリン酸が用いられ、ラウリン酸とミリスチン酸を含む複数の脂肪酸が混合された混合脂肪酸を使用する。
複数の飽和脂肪酸の混合脂肪酸とすることが低臭気性、色相の経時安定性の点から望ましい。
全混合脂肪酸中に炭素数12及び14の飽和脂肪酸、例えばラウリン酸とミリスチン酸を上記高含量で含むことを必須とすることで、泡立ちが良好で、且つペースト状態を低温域で長期間保持することが可能となる。
また、望ましくは、炭素数14の飽和脂肪酸は、炭素数12の飽和脂肪酸よりも多く含まれることが望ましく、これは上記ペースト状石鹸組成物の効果を更に有効に発現できるからである。
ステアリン酸マグネシウム又はパルミチン酸マグネシウムが混合飽和脂肪酸100質量部に対して3質量部未満となると、ペースト状石鹸組成物の流動性が大きくなることがあり、一方23質量部を超えると、ペースト状組成物の流動性は減少するがペーストのキメが粗くなってしまい望ましくない。
ステアリン酸マグネシウム又はパルミチン酸マグネシウムが配合されることで、得られるペースト状石鹸組成物は低温であっても長期にペースト状態を保持でき、低温での硬化を抑制するという作用があり、また洗浄時において制泡性もなく潤滑性のある泡を提供できると共に洗浄後にしっとり感等良好な感触を与えることができる。
かかる含有割合でタルクを含むことにより、低温域においてもペースト状石鹸組成物のペースト状態保持性能が、より有効に発現され、硬化を抑制するという効果があり望ましい。
タルクは、予め上記混合脂肪酸を調製する際に混合しても、ステアリン酸マグネシウム等とともに混合脂肪酸に配合しても、また後述する中和処理後に添加配合してもよい。
糖類としては、例えば、グラニュー糖等の市場で入手し得る糖を例示することができる。糖類を含むことにより、低温域においてもペースト状石鹸組成物のペースト状態保持性能が、より有効に発現され、硬化を抑制するという効果があり望ましい。
糖類は、予め上記混合脂肪酸を調製する際に混合しても、ステアリン酸マグネシウム等とともに混合脂肪酸に配合しても、また後述する中和処理後に添加配合してもよいが、後述する中和処理後に添加配合することが、より望ましい。
冷却液を加えて冷却した混合飽和脂肪酸等と冷却液との混合物は、白色の小さな粒子が懸濁した状態を呈している。
当該冷却液には、グリンセリンと精製水とが含まれる。
冷却液中のグリセリンは、混合脂肪酸100質量部に対して、好ましくは30~75質量部、より好ましくは45~65質量部であり、精製水は好ましくは90~250質量部、より好ましくは90~150質量部であり、例えば、かかる割合のグリセリンと精製水との混合液である冷却液を添加することで上記加温温度から少なくとも20℃低い冷却温度に冷却することができる。
冷却された上記混合飽和脂肪酸を中和して脂肪酸石鹸を得るために使用するアルカリは、水酸化カリウム及び/又は炭酸カリウムと、水酸化ナトリウム及び/又は炭酸ナトリウムとの混合アルカリであり、かかる水酸化カリウム及び/又は炭酸カリウムと、水酸化ナトリウム及び/又は炭酸ナトリウムとの混合モル比の割合は70/30~30/70、好ましくは60/40~50/50である。
水酸化カリウム及び/又は炭酸カリウムのモル比率が70より高くなってしまうと、カリウム石鹸の影響が強くなり、泡立ちや洗浄力等が満足できるものではなく、また30より水酸化カリウムの比率が低くなると、得られる石鹸の硬度が上昇して液状でなくなるとともに、使用時に水に早く溶けず起泡性が低くなることがある。
また、混合脂肪酸の中和には、前記両アルカリを予めアルカリ水溶液(例えば、有効分濃度48%を基準)とし、これを中和に用いることも可能であり、これにより短時間で均一な溶液を得ることが可能となる。
水分は水酸化カリウム/水酸化ナトリウムの重量比が70/30~30/70になるにつれて、より多くの水分を含有することが必要となる。水酸化ナトリウムの使用割合が高くなるにつれて、鹸化によって生成する脂肪酸のナトリウム塩の濃度が高くなるが、生成する脂肪酸のナトリウム塩の水に対する溶解度が小さいためと考えられる。
例えば、水分が65重量%を超えると、使用時に満足する起泡性、泡量が得られにくくなり、一方28重量%未満となると、低温時で硬化しやすくなることが発生する場合がある。
かかる範囲で水の含有量を調整すると、低温域であっても適切で使いやすいペースト状となり、粘度も適正な範囲であり、流れ出す等の流動性を有さず、また硬く固形化することもない、ペースト状石鹸組成物を得ることができ望ましい。
(条件)粘性は、20mlのポリプロピレン製シリンジ(化粧S-詰め替え容器 No.403、発売元 株式会社大創産業、シリンジ出口直径を切削調整して6.0mmとする)に所定の温度(5℃)の石鹸組成物試料を注入し、シリンジの注入棒の上に分銅を積載して、シリンジ出口より石鹸組成物が吐出するときの最大荷重を測定した値で示す。
使用した原材料は下記のものである。
[原材料]
(1)脂肪酸
・ラウリン酸(炭素数12:Mw200.31):商品名 NAA122(日油(株)製)
・ミリスチン酸(炭素数14:Mw228.36):商品名 NAA142(日油(株)製)
・パルミチン酸(炭素数16:Mw256.42):商品名 NAA160(日油(株)製)
・ステアリン酸(炭素数18:Mw284.44):商品名 NAA180(日油(株)製)
(2)アルカリ
・水酸化ナトリウム:48%水酸化ナトリウム液(関東化学(株)製、試薬鹿1級)
・水酸化カリウム :48%水酸化カリウム液(関東化学(株)製、試薬鹿1級)
・ステアリン酸マグネシウム:商品名ダイワックス M 大日化学工業株式会社製
(4)アルコール類
・グリセリン(和光一級:和光純薬(株)製)
・ソルビトール:商品名 NEOSORB70/70 シンコー・サイエンス・コーポレーション社製(70%水溶性液)
(5)砂糖(三井製糖(株)グラニュー糖)
(6)タルク:商品名 SWA-A TALC 浅田製粉株式会社製
(7)精製水:商品名 日本薬局方 精製水 小堺製薬株式会社製
(8)MCT(中鎖脂肪酸トリグリセライド;油分):商品名:日清MCTオイルHC100% 日清オイリオグループ株式会社製
(9)スクアラン:小城化成品株式会社製
(実施例1~9、比較例1~10)
上記各脂肪酸を、下記表1及び2に示す配合割合で各脂肪酸を混合して、各混合脂肪酸を調製した。
次いで、撹拌機、温度計と滴下ロートを備えた1Lフラスコに、前記混合脂肪酸を仕込み、攪拌しながら加熱昇温して、表1及び2に示す各加温温度(a)で、混合脂肪酸がすべて溶融して均一に液状となるように20~60分間攪拌保持した。なお、溶融した混合脂肪酸は透明を呈していた。
なお、比較例5については、精製水及びグリセリンとを混合した液を、混合脂肪酸と予め混合し、当該混合液を表1及び2に示す温度に加温した(加温温度(a))。
上記各加温温度の液状混合脂肪酸を攪拌しながら、当該混合脂肪酸に約20℃の常温の冷却液を一度に加えて急冷し、前記フラスコ内の混合脂肪酸と冷却液との混合液の温度を表1及び2に示す各冷却温度(b)に冷却し、更に均一になるように約5分間攪拌して、白色の懸濁状態の液状分散液を得た。次いで、該液状分散液を40~50℃の加温制御温度(c)に加温して保持した。
なお、比較例5については、精製水を172(質量部/混合脂肪酸100質量部)及びグリセリン21(質量部/混合脂肪酸100質量部)とを混合した混合液を、予め混合脂肪酸と混合しているもので、冷却液としては用いられていない。従って、上記冷却工程はなく、加温温度の状態で約5分間攪拌した状態の温度を便宜上冷却温度(b)及び加温制御温度(c)の欄に記載しているものである。
なお、混合アルカリ濃度(%)は、((48%KOH(g)+48%NaOH(g))×0.48)を(48%KOH(g)+48%NaOH(g)+希釈水(g)で割ったアルカリ濃度を示す。
熟成後、得られた組成物を室温にて放冷して、石鹸組成物を得た。
(試験例1)常温での透明性・液状安定性
実施例1~10及び比較例1~4及び7により得られた各液状石鹸組成物を生成直後に、平底試験管F25-100(型番TEST-F25-100、AGCテクノグラス)に、泡立たないように高さ75mmとなるまで入れて、密栓して25℃恒温槽又は5℃恒温槽に静置して、組成物の温度が25℃になった状態で前記平底試験菅を縦(上部)及び横より目視にて、透明性を評価した。
なお、評価は、目視により、白色塊状物、白色沈殿、濁り、分離物はなく、更に前記平底試験管の上部より(縦方向)から観察して、当該試験管の底部に設置した明朝のフォント8ポイントの文字が鮮明に読解可能であった場合は透明性を有するものとして「透明」と評価し、その結果を表1及び2に示す。
上記各実施例及び比較例で得られた石鹸組成物を、精製水を用いて5%石鹸水及び10%石鹸水を調製し、以下の試験を実施した。
実施例1~9及び比較例1~10により得られた各石鹸組成物を使用して得られた前記各石鹸水を、平底試験管F25-100(型番TEST-F25-100、AGCテクノグラス)に、泡立たないように高さ75mmとなるまで入れて、密栓して5℃恒温槽に静置して、1週間静置する。1週間静置後における液状保持性能を目視にて、また前記平底試験菅を縦(上部)及び横よる透明性を目視にて評価した。
・目視により、白色固体物が析出したり、固化が観察された場合は液状保持性能を有さず透明性も悪(×)
・目視により、白色塊状物、白色沈殿、濁り、分離物はなく、更に前記平底試験管の上部より(縦方向)から観察して、当該試験管の底部に設置した明朝のフォント8ポイントの文字が鮮明に読解可能であった場合は透明性良好であり、且つ下記の試験例4の基準で液状であるもの(〇)
上記実施例及び比較例のうち、5%及び10%石鹸水の双方ともが透明で液状であったものについて、5℃での起泡性の試験を簡易振盪法により実施した。
その結果を表3に示す。
・5分後測定された泡部の高さが30mm以上の場合は起泡性高(〇)
・泡部の高さが20mm未満の場合は起泡性低(×)
・泡部の高さが20mm以上30mm未満の場合は起泡性中(△)
・試験例2及び試験例3の評価がすべて〇であったものを〇とした。
・試験例2及び試験例3の評価のうち、いずれかが×のものを△とした。
・試験例2及び試験例3の評価がすべて×であったものを×〇とした。
その結果を表3に示す。
また、実施例の液状石鹸組成物、当該各液状石鹸組成物の5%水溶液、10%水溶液に関し、5℃の低温状態で1か月保存したものについて、上記試験例2~3を実施したところ、液状保持性能を維持し、透明であり、泡立ちも〇であり、表3の結果と同じ結果を得た。
(実施例10~20、比較例11~20)
上記各脂肪酸を、下記表4及び6に示す配合割合で各脂肪酸を混合して、各混合脂肪酸を調製した。該混合脂肪酸に、下記表4及び6に示す配合割合で、ステアリン酸マグネシウム及びタルクを混合した(混合脂肪酸等混合物)。
次いで、撹拌機、温度計と滴下ロートを備えた1Lフラスコに、前記混合脂肪酸等混合物を仕込み、攪拌しながら加熱昇温して、表5及び7に示す各加温温度(a)で、混合脂肪酸をすべて溶融させて、20~60分間攪拌保持した。
上記前記各加温温度の混合脂肪酸等混合物を攪拌しながら、当該混合脂肪酸等混合物に約20℃の冷却液を一度に加えて急冷し、前記フラスコ内の混合脂肪酸等混合物と冷却液との混合物の温度を表5及び7に示す各冷却温度(b)とし、更に均質になるように約5分間攪拌して、白色の懸濁状態の分散液を得た。次いで、該分散液を表5及び7に示す加温制御温度(c)に加温して保持した。
なお、混合アルカリ濃度(%)は、((48%KOH(g)+48%NaOH(g))×0.48)を(48%KOH(g)+48%NaOH(g)+希釈水(g)で割ったアルカリ濃度を示す。
熟成後、得られた組成物を室温にて放冷して、石鹸組成物を得た。
実施例のものはすべてペースト状の脂肪酸石鹸組成物が得られた。
実施例10~20及び比較例11~12、比較例14~16及び比較例18~20により得られた各石鹸組成物を、平底試験管F25-100(型番TEST-F25-100、AGCテクノグラス)に、泡立たないように高さ75mmとなるまで入れて、密栓して5℃恒温槽に静置して、1か月間静置した。1か月静置後におけるペースト保持性能を目視にて評価するとともに、以下の粘性試験で評価した。なお、比較例13及び17については、常温においても固化しており、5℃での1か月静置後においても固化状態であった。
(粘性試験)
20mlのポリプロピレン製シリンジ(化粧S-詰め替え容器 No.403、発売元 株式会社大創産業)の注入口を内径6.0mmの孔となるように切削処理して調整したシリンジ(シリンジ出口直径:6.00mm)を用いて、所定の温度(5℃)で恒温となった各石鹸組成物を上記シリンジに約15ml注入し、空気が入らないように出口を塞いで圧縮した後、各試料が円柱状に押出されたことを確認してから垂直に支持台に固定した。
次いで、シリンジの注入棒の上に設置したプラスチック製の箱(13g)の中に分銅を積載して、シリンジ内の各石鹸組成物試料の吐出が開始するときの最大荷重を測定して、粘性の試験を行った。その評価は、以下の表8に示す評価基準とした。得られた結果を下記表9に示す。
試験例4でペースト状保持性能を維持した実施例について、5℃での起泡性の試験を簡易振盪法により実施した。
具体的には、AGCテクノグラス(株)製の25mm径平底試験管(TEST-F25-100)3本に、得られた各ペースト状石鹸3gと精製水5mlをスポイトを用いて秤量注入し、塩化ビニルラップと輪ゴムで密栓してから試験管立てをセットした5℃の恒温水槽に浸して30分間5℃に保持した後、20秒間で20回天地返しにより振盪させ、直後の起泡性試験として、当該試験管底部からの液面(=泡部の底の)高さと泡部の最高位の高さを測定して泡部の高さとした。
・5分後測定された泡部の高さが30mm以上の場合は起泡性高(〇)
・泡部の高さが20mm未満の場合は起泡性低(×)
・泡部の高さが20mm以上30mm未満の場合は起泡性中(△)
得られた結果を下記表9に示す。
Claims (4)
- 炭素数12及び14の飽和脂肪酸を85~100モル%含む炭素数12~炭素数18の飽和脂肪酸よりなる混合脂肪酸であって、炭素数8~10の飽和脂肪酸を含まない混合飽和脂肪酸を、80℃以上に加温して溶融し、次いで、当該混合飽和脂肪酸に、グリセリン及び水からなる冷却液を一度に加えて前記加温温度より少なくとも20℃以上低い温度に冷却し、その後再び加温して40~55℃に保持し、該加温保持された混合脂肪酸含有液に、水酸化カリウム及び/又は炭酸カリウムと、水酸化ナトリウム及び/又は炭酸ナトリウムとのモル比が90/10~30/70の範囲で混合された混合アルカリの水溶液を一度に加えて、攪拌しながら昇温して80~95℃に保持して中和して、液状石鹸組成物を調製する、高級脂肪酸ナトリウム及び高級脂肪酸カリウム含有石鹸組成物の製造方法。
- 請求項1記載の高級脂肪酸ナトリウム及び高級脂肪酸カリウム含有石鹸組成物の製造方法において、炭素数12の飽和脂肪酸は、炭素数14の飽和脂肪酸よりも多く含有されることを特徴とする、高級脂肪酸ナトリウム及び高級脂肪酸カリウム含有石鹸組成物の製造方法。
- 炭素数12及び14の飽和脂肪酸を80~90モル%含む炭素数12~炭素数18の飽和脂肪酸よりなる混合脂肪酸であって、炭素数8~10の飽和脂肪酸を含まない混合飽和脂肪酸と、前記混合飽和脂肪酸100質量部に対して3~23質量部のステアリン酸マグネシウム又はパルミチン酸マグネシウムとの混合物を80℃以上に加温して前記混合飽和脂肪酸を溶融し、
次いで、当該混合飽和脂肪酸とステアリン酸マグネシウム又はパルミチン酸マグネシウムとの混合物に、グリセリン及び水からなる冷却液を一度に加えて前記加温温度より少なくとも20℃以上低い温度に冷却し、当該グリセリンは混合飽和脂肪酸100質量部に対して30~75質量部で配合され、
前記冷却後に前記混合物を再び加温して40~55℃に保持し、
該加温保持された混合物に、水酸化カリウム及び/又は炭酸カリウムと、水酸化ナトリウム及び/又は炭酸ナトリウムとのモル比が70/30~30/70の範囲で混合された混合アルカリの水溶液を一度に加えて、攪拌しながら昇温して80~95℃に保持して中和して、ペースト状石鹸組成物を調製し、該ペースト状石鹸組成物中に、前記混合飽和脂肪酸100質量部に対して3~13質量部のタルク及び50~180質量部のソルビトールが含まれるように、前記中和前又は中和後にタルク及びソルビトールを配合する、高級脂肪酸ナトリウム及び高級脂肪酸カリウム含有石鹸組成物の製造方法。 - 請求項3記載の、高級脂肪酸ナトリウム及び高級脂肪酸カリウム含有石鹸組成物の製造方法において、更に糖類及び/又は油脂類を配合することを特徴とする、高級脂肪酸ナトリウム及び高級脂肪酸カリウム含有石鹸組成物の製造方法。
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