CA2047532A1 - Protease-containing liquid detergent compositions - Google Patents
Protease-containing liquid detergent compositionsInfo
- Publication number
- CA2047532A1 CA2047532A1 CA002047532A CA2047532A CA2047532A1 CA 2047532 A1 CA2047532 A1 CA 2047532A1 CA 002047532 A CA002047532 A CA 002047532A CA 2047532 A CA2047532 A CA 2047532A CA 2047532 A1 CA2047532 A1 CA 2047532A1
- Authority
- CA
- Canada
- Prior art keywords
- enzyme
- composition
- compositions
- protease
- weight
- 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.)
- Abandoned
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 118
- 239000007788 liquid Substances 0.000 title claims abstract description 55
- 108091005804 Peptidases Proteins 0.000 title claims abstract description 50
- 239000003599 detergent Substances 0.000 title claims abstract description 48
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 title claims description 30
- 239000004365 Protease Substances 0.000 title abstract description 37
- 102000004190 Enzymes Human genes 0.000 claims abstract description 41
- 108090000790 Enzymes Proteins 0.000 claims abstract description 41
- 239000002002 slurry Substances 0.000 claims abstract description 24
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims abstract description 21
- 102000035195 Peptidases Human genes 0.000 claims abstract description 20
- 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 claims abstract description 10
- 235000019260 propionic acid Nutrition 0.000 claims abstract description 8
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 4
- 229920000642 polymer Polymers 0.000 claims description 22
- 125000000129 anionic group Chemical group 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000004094 surface-active agent Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 10
- 239000004615 ingredient Substances 0.000 claims description 10
- 230000002255 enzymatic effect Effects 0.000 claims description 8
- 239000003945 anionic surfactant Substances 0.000 claims description 5
- 159000000007 calcium salts Chemical class 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 abstract description 22
- 239000003381 stabilizer Substances 0.000 abstract description 17
- -1 e.g. Substances 0.000 abstract description 16
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract description 9
- 230000006641 stabilisation Effects 0.000 abstract description 5
- 238000011105 stabilization Methods 0.000 abstract description 5
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 abstract 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 abstract 1
- 235000019253 formic acid Nutrition 0.000 abstract 1
- 229940088598 enzyme Drugs 0.000 description 38
- 108010020132 microbial serine proteinases Proteins 0.000 description 27
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 21
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 19
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 19
- 229910052799 carbon Inorganic materials 0.000 description 12
- 239000003792 electrolyte Substances 0.000 description 12
- 239000012071 phase Substances 0.000 description 12
- 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 description 11
- 229910052708 sodium Inorganic materials 0.000 description 11
- 239000011734 sodium Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 150000007942 carboxylates Chemical class 0.000 description 8
- 235000014113 dietary fatty acids Nutrition 0.000 description 8
- 239000000194 fatty acid Substances 0.000 description 8
- 229930195729 fatty acid Natural products 0.000 description 8
- 229910052700 potassium Inorganic materials 0.000 description 8
- 239000011591 potassium Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 7
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229910000323 aluminium silicate Inorganic materials 0.000 description 6
- 150000004665 fatty acids Chemical class 0.000 description 6
- 150000004675 formic acid derivatives Chemical class 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000000137 peptide hydrolase inhibitor Substances 0.000 description 6
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical group [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 5
- 229910052783 alkali metal Inorganic materials 0.000 description 5
- 229910021538 borax Inorganic materials 0.000 description 5
- LLSDKQJKOVVTOJ-UHFFFAOYSA-L calcium chloride dihydrate Chemical compound O.O.[Cl-].[Cl-].[Ca+2] LLSDKQJKOVVTOJ-UHFFFAOYSA-L 0.000 description 5
- 229940052299 calcium chloride dihydrate Drugs 0.000 description 5
- 229910001424 calcium ion Inorganic materials 0.000 description 5
- 230000009849 deactivation Effects 0.000 description 5
- 229940042399 direct acting antivirals protease inhibitors Drugs 0.000 description 5
- 235000014666 liquid concentrate Nutrition 0.000 description 5
- 229920001296 polysiloxane Polymers 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000002797 proteolythic effect Effects 0.000 description 5
- 235000010339 sodium tetraborate Nutrition 0.000 description 5
- 108010056079 Subtilisins Proteins 0.000 description 4
- 102000005158 Subtilisins Human genes 0.000 description 4
- 235000008504 concentrate Nutrition 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 238000005342 ion exchange Methods 0.000 description 4
- 229910003002 lithium salt Inorganic materials 0.000 description 4
- 159000000002 lithium salts Chemical class 0.000 description 4
- 239000003605 opacifier Substances 0.000 description 4
- 229940024999 proteolytic enzymes for treatment of wounds and ulcers Drugs 0.000 description 4
- 239000004328 sodium tetraborate Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000000271 synthetic detergent Substances 0.000 description 4
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical class OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 3
- 159000000021 acetate salts Chemical class 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 150000001735 carboxylic acids Chemical class 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical class OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000004925 denaturation Methods 0.000 description 3
- 230000036425 denaturation Effects 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 229920005646 polycarboxylate Polymers 0.000 description 3
- 229920005862 polyol Polymers 0.000 description 3
- 150000003077 polyols Chemical class 0.000 description 3
- QUCDWLYKDRVKMI-UHFFFAOYSA-M sodium;3,4-dimethylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1C QUCDWLYKDRVKMI-UHFFFAOYSA-M 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical group [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical class CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 2
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 108090000787 Subtilisin Proteins 0.000 description 2
- 150000001242 acetic acid derivatives Chemical class 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 125000000217 alkyl group Chemical class 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229960005069 calcium Drugs 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 239000007859 condensation product Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 150000002191 fatty alcohols Chemical class 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- YDSWCNNOKPMOTP-UHFFFAOYSA-N mellitic acid Chemical class OC(=O)C1=C(C(O)=O)C(C(O)=O)=C(C(O)=O)C(C(O)=O)=C1C(O)=O YDSWCNNOKPMOTP-UHFFFAOYSA-N 0.000 description 2
- 235000002949 phytic acid Nutrition 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 235000019832 sodium triphosphate Nutrition 0.000 description 2
- CIOXZGOUEYHNBF-UHFFFAOYSA-N (carboxymethoxy)succinic acid Chemical class OC(=O)COC(C(O)=O)CC(O)=O CIOXZGOUEYHNBF-UHFFFAOYSA-N 0.000 description 1
- XBRSMICTSWBNTP-UHFFFAOYSA-N 1,1,3-triphosphonopropan-2-ylphosphonic acid Chemical compound OP(O)(=O)CC(P(O)(O)=O)C(P(O)(O)=O)P(O)(O)=O XBRSMICTSWBNTP-UHFFFAOYSA-N 0.000 description 1
- OGTPNDHOHCFDTK-UHFFFAOYSA-N 1,2,3-triphosphonopropan-2-ylphosphonic acid Chemical compound OP(O)(=O)CC(P(O)(O)=O)(P(O)(O)=O)CP(O)(O)=O OGTPNDHOHCFDTK-UHFFFAOYSA-N 0.000 description 1
- SFRLSTJPMFGBDP-UHFFFAOYSA-N 1,2-diphosphonoethylphosphonic acid Chemical class OP(O)(=O)CC(P(O)(O)=O)P(O)(O)=O SFRLSTJPMFGBDP-UHFFFAOYSA-N 0.000 description 1
- YVPHSTVRTGSOSK-UHFFFAOYSA-N 1,3,3-triphosphonopropylphosphonic acid Chemical compound OP(O)(=O)C(P(O)(O)=O)CC(P(O)(O)=O)P(O)(O)=O YVPHSTVRTGSOSK-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- QTDIEDOANJISNP-UHFFFAOYSA-N 2-dodecoxyethyl hydrogen sulfate Chemical compound CCCCCCCCCCCCOCCOS(O)(=O)=O QTDIEDOANJISNP-UHFFFAOYSA-N 0.000 description 1
- XYJLPCAKKYOLGU-UHFFFAOYSA-N 2-phosphonoethylphosphonic acid Chemical class OP(O)(=O)CCP(O)(O)=O XYJLPCAKKYOLGU-UHFFFAOYSA-N 0.000 description 1
- JBVOQKNLGSOPNZ-UHFFFAOYSA-N 2-propan-2-ylbenzenesulfonic acid Chemical class CC(C)C1=CC=CC=C1S(O)(=O)=O JBVOQKNLGSOPNZ-UHFFFAOYSA-N 0.000 description 1
- 102000013142 Amylases Human genes 0.000 description 1
- 108010065511 Amylases Proteins 0.000 description 1
- 208000035404 Autolysis Diseases 0.000 description 1
- 235000014469 Bacillus subtilis Nutrition 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- NQPIQKNRQKVBEW-UHFFFAOYSA-N C(=O)(O)P(=O)(O)OP(=O)O Chemical compound C(=O)(O)P(=O)(O)OP(=O)O NQPIQKNRQKVBEW-UHFFFAOYSA-N 0.000 description 1
- GAWIXWVDTYZWAW-UHFFFAOYSA-N C[CH]O Chemical group C[CH]O GAWIXWVDTYZWAW-UHFFFAOYSA-N 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 206010057248 Cell death Diseases 0.000 description 1
- 102000005575 Cellulases Human genes 0.000 description 1
- 108010084185 Cellulases Proteins 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 239000004471 Glycine Substances 0.000 description 1
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 description 1
- 239000004367 Lipase Substances 0.000 description 1
- 102000004882 Lipase Human genes 0.000 description 1
- 108090001060 Lipase Proteins 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 229940124158 Protease/peptidase inhibitor Drugs 0.000 description 1
- 108010009736 Protein Hydrolysates Proteins 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910000318 alkali metal phosphate Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 235000019418 amylase Nutrition 0.000 description 1
- 229940025131 amylases Drugs 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001734 carboxylic acid salts Chemical class 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 125000002592 cumenyl group Chemical group C1(=C(C=CC=C1)*)C(C)C 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical class OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002169 ethanolamines Chemical class 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 125000003630 glycyl group Chemical group [H]N([H])C([H])([H])C(*)=O 0.000 description 1
- 239000003752 hydrotrope Substances 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 238000012417 linear regression Methods 0.000 description 1
- 235000019421 lipase Nutrition 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- MBKDYNNUVRNNRF-UHFFFAOYSA-N medronic acid Chemical class OP(O)(=O)CP(O)(O)=O MBKDYNNUVRNNRF-UHFFFAOYSA-N 0.000 description 1
- 108010003855 mesentericopeptidase Proteins 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical class OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000399 optical microscopy Methods 0.000 description 1
- HJZKOAYDRQLPME-UHFFFAOYSA-N oxidronic acid Chemical compound OP(=O)(O)C(O)P(O)(O)=O HJZKOAYDRQLPME-UHFFFAOYSA-N 0.000 description 1
- 229960004230 oxidronic acid Drugs 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- ATGAWOHQWWULNK-UHFFFAOYSA-I pentapotassium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical class [K+].[K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O ATGAWOHQWWULNK-UHFFFAOYSA-I 0.000 description 1
- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 239000000467 phytic acid Substances 0.000 description 1
- 229940068041 phytic acid Drugs 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000003531 protein hydrolysate Substances 0.000 description 1
- 150000003856 quaternary ammonium compounds Chemical class 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000028043 self proteolysis Effects 0.000 description 1
- 239000003352 sequestering agent Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Inorganic materials [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- RPACBEVZENYWOL-XFULWGLBSA-M sodium;(2r)-2-[6-(4-chlorophenoxy)hexyl]oxirane-2-carboxylate Chemical compound [Na+].C=1C=C(Cl)C=CC=1OCCCCCC[C@]1(C(=O)[O-])CO1 RPACBEVZENYWOL-XFULWGLBSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000006076 specific stabilizer Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- JZBRFIUYUGTUGG-UHFFFAOYSA-J tetrapotassium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical class [K+].[K+].[K+].[K+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O JZBRFIUYUGTUGG-UHFFFAOYSA-J 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000001226 triphosphate Substances 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000010457 zeolite Substances 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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/38—Products with no well-defined composition, e.g. natural products
- C11D3/386—Preparations containing enzymes, e.g. protease or amylase
- C11D3/38663—Stabilised liquid enzyme compositions
-
- 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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/40—Products in which the composition is not well defined
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
C 6134 (R) ABSTRACT
The present invention is concerned with the stabilization of proteases in built, aqueous detergent compositions. More particularly, applicants have discovered that propionic acid or a propionic salt capable of forming propionic acid unexpectedly increases stability relative to other stabilizers, e.g., formic acid or acetic acid (or salts thereof), used in these compositions. When the proteolytic enzyme is added in the form of a slurry of the enzyme in liquid nonionic surfactant, a surprising further improvement in stability is obtained.
The present invention is concerned with the stabilization of proteases in built, aqueous detergent compositions. More particularly, applicants have discovered that propionic acid or a propionic salt capable of forming propionic acid unexpectedly increases stability relative to other stabilizers, e.g., formic acid or acetic acid (or salts thereof), used in these compositions. When the proteolytic enzyme is added in the form of a slurry of the enzyme in liquid nonionic surfactant, a surprising further improvement in stability is obtained.
Description
~ i c ~ ~ 2 C 6134 (R) PROTEASE-CONTAINING LIOUID DETERGENT COMPOSITIONS
TECHNICAL FIELD
This invention relates to the stabilization of proteases in liquid detergent compositions, more in particular built, anionic-rich aqueous detergent compositions.
BACKGROUND AND PRIOR ART
The use of proteases in heavy duty liquid detergent for-mulations (HDLS) is complicated by their limited stability in solution. Two processes which limit the shelf-life of a protease in an aqueous liquid detergent are denaturation and autolysis (self-digestion). Considerable efforts have been devoted to the stabilization of enzymes in aqueous liquid detergent compositions, which represent a medium that is problematical for the preservation of enzyme activity during storage and distribution.
Denaturation of proteases may be minimized by selection of formulation components (i.e. actives, builders, pH etc.) so that acceptable enzyme stability can be achieved. Self-digestion of proteases may be minimized by inclusion of aprotease inhibitor. The inhibitor is released from the enzyme upon dilution in the wash.
Various protease i~hibitors are known in the art. For example, US-A-4 261 868 (Unilever) teaches the use of borax as a protease inhibitor and both US-A-4 243 546 (Drackett) and GB-A-l 354 761 (Henkel) teach the use of carboxylic acids as protease inhibitors. Various combinations of these protease inhibitors are also known in the art. US-A-4 305 ~37 (Procter & Gamble)~ for example, teaches the combination of carboxylic acids and simple alcohols and US-A-4 404 115 (Unilever) teaches the combination of borax and polyols as protease inhibitors. US-A-4 537 707 (Procter & Gamble) teaches the combination of borax and carboxylates as protease inhibitors.
~'r~ !r~ S~
TECHNICAL FIELD
This invention relates to the stabilization of proteases in liquid detergent compositions, more in particular built, anionic-rich aqueous detergent compositions.
BACKGROUND AND PRIOR ART
The use of proteases in heavy duty liquid detergent for-mulations (HDLS) is complicated by their limited stability in solution. Two processes which limit the shelf-life of a protease in an aqueous liquid detergent are denaturation and autolysis (self-digestion). Considerable efforts have been devoted to the stabilization of enzymes in aqueous liquid detergent compositions, which represent a medium that is problematical for the preservation of enzyme activity during storage and distribution.
Denaturation of proteases may be minimized by selection of formulation components (i.e. actives, builders, pH etc.) so that acceptable enzyme stability can be achieved. Self-digestion of proteases may be minimized by inclusion of aprotease inhibitor. The inhibitor is released from the enzyme upon dilution in the wash.
Various protease i~hibitors are known in the art. For example, US-A-4 261 868 (Unilever) teaches the use of borax as a protease inhibitor and both US-A-4 243 546 (Drackett) and GB-A-l 354 761 (Henkel) teach the use of carboxylic acids as protease inhibitors. Various combinations of these protease inhibitors are also known in the art. US-A-4 305 ~37 (Procter & Gamble)~ for example, teaches the combination of carboxylic acids and simple alcohols and US-A-4 404 115 (Unilever) teaches the combination of borax and polyols as protease inhibitors. US-A-4 537 707 (Procter & Gamble) teaches the combination of borax and carboxylates as protease inhibitors.
~'r~ !r~ S~
2 C 6134 (R) As mentioned above, the use of carboxylates in detergent compositions as protease inhibitors is known. US-A-4 318 818, for example, teaches stabilized, liquid enzyme compositions in which the inhibitor is a short chain length carboxylic acid salt selected from the group consisting of formates, acetates, propionates and mixtures thereof. This patent teaches that formates are surprisingly much more effective than other short chain salts such as acetates and propionates. The reference also teaches that at a pH range above 8.5, only formates can be used. The detergent compositions used in this patent are unbuilt, i.e., contain no builders.
US-A-4 243 546 (Drackett) teaches aqueous enzyme compositions wherein the enzyme stabilizer is selected from the group consisting of mono and diacids having from 1 to 18 carbon atoms. Acetic acid is said to be preferred. Compositions of the invention are also unbuilt. The patent seems to be primarily directed to compositions having a pH below 8 (most of the examples have a pH of 7.5) and the one example which has a pH of 9.5 appears to require the presence of alcohol (ethanol). In addition, the composition not only are not anionic rich, but appear to comprise no anionics at all.
GB-A-l 354 761 (Henkel) teaches compositions which may contain 2 to 8 carbon carboxylic acids. All the examples show use of acetic acid and the detergent compositions of the invention are also unbuilt.
Thus, where carboxylic acid stabilizers are used in the prior art, there is a preference for 1 or 2 carbo~ carboxylic acids (acetate and formate). When compositions of high pH (i.e.
greater than 8.5) are used in the prior art, either the use of formate is dictated (as in US-A-4 318 818) or the carboxylic acid is used in combination with an alcohol or in an environment which is not anionic rich. The compositions of ", ~ "~ 'J ~
US-A-4 243 546 (Drackett) teaches aqueous enzyme compositions wherein the enzyme stabilizer is selected from the group consisting of mono and diacids having from 1 to 18 carbon atoms. Acetic acid is said to be preferred. Compositions of the invention are also unbuilt. The patent seems to be primarily directed to compositions having a pH below 8 (most of the examples have a pH of 7.5) and the one example which has a pH of 9.5 appears to require the presence of alcohol (ethanol). In addition, the composition not only are not anionic rich, but appear to comprise no anionics at all.
GB-A-l 354 761 (Henkel) teaches compositions which may contain 2 to 8 carbon carboxylic acids. All the examples show use of acetic acid and the detergent compositions of the invention are also unbuilt.
Thus, where carboxylic acid stabilizers are used in the prior art, there is a preference for 1 or 2 carbo~ carboxylic acids (acetate and formate). When compositions of high pH (i.e.
greater than 8.5) are used in the prior art, either the use of formate is dictated (as in US-A-4 318 818) or the carboxylic acid is used in combination with an alcohol or in an environment which is not anionic rich. The compositions of ", ~ "~ 'J ~
3 C 6134 (R) the prior art are also unbuilt and there appears to be no recognition of the importance of using anionic rich compositions with specific stabilizers.
Existing aqueous enzymatic liquid laundry detergents are commonly formulated using as additive a stabilized aqueous liquid enzyme concentrate. In his article in Tenside 27(1), p.30 (l990), G. Jensen describes the difficulty of formulating built liquid detergent compositions comprising proteolytic enzymes. Such products are said to require a special type of enzyme in order to obtain a satisfactory storage stability. The normal liquid enzymes (i.e. aqueous concentrates and non-aqueous slurries) are loosing their activity too fast due to denaturation of enzyme protein structure by the alkaline ingredients and sequestering agent present in the composition. To solve this problem, the author believes it is necessary to use a protected enzyme system comprising a dispersion of the enzyme in a silicone matrix, so-called silicone slurries. An example is given of a liquid detergent product comprising a phosphate-builder and a proteolytic enzyme in the form of a slurry, which indeed shows a poor enzyme stability.
Unexpectedly, applicants have discovered that, when the detergent composition is a built, preferably anionic rich composition having a pH greater than 7.0, preferably greater than 8.5 and more preferably 9.0 and above, enzyme stability is enhanced relative to other carboxylic acid stabilizers (i.e. acetate or formate) by the use of propionate rather than acetate or formate.
Furthermore, it has surprisingly been found`that improved stability of enzyme can be achieved in aqueous liquid detergent concentrates when the enzyme is added to the formulation as a slurry of the enzyme in a nonionic detergent which is normally liquid.
Existing aqueous enzymatic liquid laundry detergents are commonly formulated using as additive a stabilized aqueous liquid enzyme concentrate. In his article in Tenside 27(1), p.30 (l990), G. Jensen describes the difficulty of formulating built liquid detergent compositions comprising proteolytic enzymes. Such products are said to require a special type of enzyme in order to obtain a satisfactory storage stability. The normal liquid enzymes (i.e. aqueous concentrates and non-aqueous slurries) are loosing their activity too fast due to denaturation of enzyme protein structure by the alkaline ingredients and sequestering agent present in the composition. To solve this problem, the author believes it is necessary to use a protected enzyme system comprising a dispersion of the enzyme in a silicone matrix, so-called silicone slurries. An example is given of a liquid detergent product comprising a phosphate-builder and a proteolytic enzyme in the form of a slurry, which indeed shows a poor enzyme stability.
Unexpectedly, applicants have discovered that, when the detergent composition is a built, preferably anionic rich composition having a pH greater than 7.0, preferably greater than 8.5 and more preferably 9.0 and above, enzyme stability is enhanced relative to other carboxylic acid stabilizers (i.e. acetate or formate) by the use of propionate rather than acetate or formate.
Furthermore, it has surprisingly been found`that improved stability of enzyme can be achieved in aqueous liquid detergent concentrates when the enzyme is added to the formulation as a slurry of the enzyme in a nonionic detergent which is normally liquid.
4 ~- C 6134 (R) DEFINITION OF T~E INVENTION
Accordingly, the present invention provides a stable, aqueous enzymatic detergent composition comprising:
(a) from about 5 to about 65% by weight of a surfactant;
(b) from about 0.5 to about 50% by weight of a builder;
(c) a protease enzyme added in sufficient quantity to have an activity level of 0.01 to 200,000 GU/gm;
(d) from about 0.1 to about 15% by weight propionic acid or a propionic acid salt capable of forming propionic acid;
the remainder being water and minor ingredients;
wherein the pH of the composition is greater that 7Ø
Preferably, the pH of the composition is greater than 8.5, more preferably 9.0 and above.
The invention also provides a process for preparing such aqueous liquid enzymatic detergent compositions, wherein the proteolytic enzyme is preferably added in the form of a slurry of the enzyme in liquid nonionic surfactant.
DETAILED DESCRIPTION OF THE INVENTION
Detergent Active The compositions of the invention comprise from about 5% to about 65% by weight of (a) anionic surfactant or (b) anionic surfactant and one or more detergent actives wherein the ratio of anionic to non-anionic by weight is greater than 1 : 1 .
The detergent active material other than anionic surfactant may be an alkali metal or alkanolamine soap or a 10 to 24 carbon atom fatty acid, including polymerized fatty acids, or a nonionic, cationic, zwitterionic or amphoteric synthetic detergent material, or mixtures of any of these.
Examples of the anionic synthetic detergents are salts (including sodium, potassium, ammonium and substituted ammonium salts such as mono-, di and triethanolamine salts of 9 to 20 carbon alkylbenzenesulphonates, 8 to 22 carbon J
C 6134 (R) primary or secondary alkanesulphonates, 8 to 24 carbon olefinsulphonates, sulphonated polycarboxylic acids prepared by sulphonation of the pyrolyzed product of alkaline earth metal citrates, e.g., as described in GB-A-1 082 179, 8 to 22 carbon alkylsulphates, 8 to 24 carbon alkylpolyglycol-ether-sulphates, -carboxylates and -phosphates (containing up to 10 moles of ethylene oxide); further examples are described in "Surface Active Agents and Detergents" (Vol. I
and II) by Schwartz, Perry and Berch. Any suitable anionic may be used and the examples are not intended to be limiting in any way.
Examples of nonionic synthetic detergents which may be used with the invention are the condensation products of ethylene oxide, propylene oxide and/or butylene oxide with ~ to 18 carbon alkylphenols, 8 to 18 carbon primary or secondary aliphatic alcohols, 8 to 18 carbon fatty acid amides; further examples of nonionics include tertiary amine oxides with one 8 to 18 carbon alkyl chain and two 1 to 3 carbon alkyl chains. The above reference also describes further examples of nonionics.
The average number of moles of ethylene oxide and/or propylene oxide present in the above nonionics varies from 1-30; mixtures of various nonionics, including mixtures of nonionics with a lower and a higher degree of alkoxylation, may also be used. Preferred are ethoxylated C12-C15 fatty alcohols having 3-9 E0-groups, 5-7 E0-groups being especially preferred.
Examples of cationic detergents are the quaternary ammonium compounds such as alkyldimethylammonium halogenides.
Examples of amphoteric or zwitterionic detergents which may be used with the invention are N-alkylamino acids, sulphobetaines, condensation products of fatty acids with protein hydrolysates; but owing to their relatively high ~ ~ 3 ~ I ' 2 6 C 6134 (R) costs they are usually used in combination with an anionic or a nonionic detergent. Mixtures of the various types of active detergents may also be used, and preference is given to mixtures of an anionic and a nonionic detergent active. Soaps (in the form of their sodium, potassium and substituted ammonium salts) of fatty acids may also be used, preferably in conjunction with an anionic and/or nonionic synthetic detergent.
Among the compositions of the present invention are aqueous liquid detergents having for example a homogeneous physical character, e.g. they can consist of a micellar solution of surfactants in a continuous aqueous phase, so-called isotropic liquids.
Alternatively, they can have a heterogeneous physical phase and they can be structured, for example they can consist of a dispersion of lamellar droplets in a continuous aqueous phase, for example comprising a defloccuiating polymer having a hydrophilic backbone and at least one hydrophobic side chain, as described in EP-A-346 995 (Unilever) (incorporated herein by reference). These latter liquids are heterogeneous and may contain suspended solid particles such as particles of builder materia:Ls e.g. of the kinds mentioned below.
Builders Builders which can be used according to this invention include conventional alkaline detergency builders, inorganic or organic, which can be used at levels from about 0.5% to about 50% by weight of the composition, preferably from 3% to about 35% by weight. More particularly, when non-structured compositions are used, preferred amounts of ~ builder are 3 to 10% and when structured compositions are used, preferred amounts of builder are 5%-35% by weight.
By structured liquid composition is meant a composition in which at least some of the detergent active forms a f~ i J
7 C 6134 (R) structured phase. Preferably such structured phase is capable of suspending a solid particulate material.
More particularly, when a structured liquid is contemplated, the composition requires sufficient electrolyte to cause the formation of a lamellar phase by the surfactant to endow solid suspending capability. The selection of the particular type(s) and amount of electrolyte to bring this into being for a given choice of surfactant is effected using methodology very well known to those skilled in the art. It utilizes the particular techniques described in a wide variety of references. One such technique entails conducti~ity measurements. The detection of the presence of such a lamellar phase is also very well known and may be ef-fected by, for example, optical and electron microscopy orX-ray diffraction, supported by conductivity measurement.
As used herein, the term electrolyte means any water-soluble salt. The amount of electrolyte should be sufficient to cause formation of a lamellar phase by the surfactant to endow solid suspending capability. Preferably, the composition comprises at least 1.0% by weight, more preferably at least 5.0~ by weight, most preferably at least 17.0% by weight of electrolyte. The electrolyte may also be a detergency builder, such as the inorganic builder sodium tripoly-phosphate, or it may be a non-functional electrolyte such as sodium sulphate or chloride. Preferably, the inorganic builder comprises all or part of the electrolyte.
Such structured compositions are capable of suspending particulate solids, although particularly preferred are those systems where such solids are actually in suspension. The solids may be undissolved electrolyte, the same as or different from the electrolyte in solution, the latter being saturated in electrolyte. Additionally, or alternatively, they may be materials which are substantially insoluble in water alone. Examples of such substantially insoluble ~ 4~! f, ~,~
8 C 6134 (R) materials are aluminosilicate builders and particles of calcite abrasive.
Examples of suitable inorganic alkaline detergency builders which may be used (in structured or unstructured compositions) are water-soluble alkalimetal phosphates, polyphosphates, borates, silicates and also carbonat~s.
specific examples of such salts are sodium and potassium triphosphates, pyrophosphates, orthophosphates, hexametaphosphates, tetraborates, silicates and carbonates.
Examples of suitable organic alkaline detergency builder salts are: (1) water-soluble amino polycarboxylates, e.g., sodium and potassium ethylenediaminetetraacetates, nitrilotriacetates and N-(Z hydroxyethyl)-nitrilodiacetates;
(2) water-soluble salts of phytic acid, e.g., sodium and potassium phytates (see US-A-2 379 942); (3) water-soluble polyphosphonates, including specifically, sodium, potassium and lithium salts of ethane-;-hydroxy-l,l-diphosphonic acid;
sodium, potassium and lithium salts of methylene diphosphonic acid; sodium, potassium and lithium salts of ethylene diphosphonic acid; and sodium, potassium and lithium salts of ethane-1,1,2-triphosphonic acid. Other examples include the alkali metal salts of ethane-2-carboxy-1,1-diphosphonic acid hydroxymethane diphosphonic acid, carboxyldiphosphonic acid, ethane~l-hydroxy-1,1,2-triphosphonic acid, ethane-2-hydroxy-1,1,2-triphosphonic acid, propane-1,1,3,3-tetraphosphonic acid, propane-1,1,2,3-tetraphosphonic acid, and propane-1,2,2,3-tetraphosphonic acid; (4) water-soluble salts of polycarboxylate polymers and copolymers as described in US-A-3 308 067.
In addition, polycarboxylate builders can be used satis-factorily, including water-soluble salts of mellitic acid, citric acid, and carboxymethyloxysuccinic acid and salts of polymers of itaconic acid and maleic acid.
9 C 6134 (R) Certain zeolites or aluminosilicates can be used. One such aluminosilicate which is useful in the compositions of the invention is an amorphous water-insoluble hydrated compound, said amorphous material being characterized by a Mg++
exchange capacity of from about 50 mg eq. CaCG3/g and a particle diameter of from about 0.01 micron to about 5 microns. This ion-exchange builder is more fully described in GB-A-1 470 250.
A second water-insoluble synthetic aluminosilicate ion exchange material useful herein is crystalline in nature and has the formula Naz[(AlO2)y.(SiO2)].xH20, wherein z and y are integers of at least 6; the molar ratio of z to y is in the range from 1.0 to about 0.5, and x is an integer from about 15 to about 264; said aluminosilicate ion exchange material having a particle size diameter from about 0.1 micron to about 100 microns; a calcium ion exchange capacity on an anhydrous basis of at least about 200 milligrams equivalent of CaCO3 hardness per gram; and a calcium exchange rate on an anhydrous basis of at least about 2 grains/gallon/minute/
gram. These synthetic aluminosilicates are more fully described in GB-A-l 429 143.
The Enzymes The proteolytic enzyme used in the present invention can be of vegetable, animal or microorganism origin. Preferably, it is of the latter origin, which includes yeasts, fungi, moulds and bacteria. Parti.cularly preferred are bacterial subtilisin type proteases, obtained from e.g. particular strains of B.
subtilis and B. lioheniformis. Examples of suitable commercially available proteases are Alcalase, Savinase, Esperase, all of NOV0 Industri A/S; Maxatase and Maxacal of Gist-Brocades; Kazusase of Showa Denko; Subtilisin BPN' and Subtilisin BPN'-derived proteases and so on.
5enetic engineering of any of the above-mentioned enzymes can be achieved e.g. by extraction of an appropriate gene, and lo C 6134 (R) introduction and expression of the gene or derivative thereof in a suitable producer organism. EP-A-130 756 ~Genentech), ~P-A-214 435 (Henkel), W0 87/04461 (Amgen), Wo 87/05050 (Genex), EP-A-405 901 (Unilever) and EP-A-303 761 (Genentech) describe useful modified subtilisin proteases.
The amount of proteolytic enzyme included in the composition ranges from 0.01 to 200,000 GU/g, preferably from 1 to 100,000 GU/g, most preferably from 1000 to 50,000 GU/g, based on the final composition. Naturally, mixtures of different proteolytic enzymes may be used.
A GU is a glycine unit, which is the amount of proteolytic enzyme which under standard incubation conditions produces an amount of terminal NH2-groups equivalent to 1 microgramme/ml of glycine.
The proteolytic enzymes are usually added in the form of concentrated aqueous solutions. However, it has now surprisingly been found that even further improved stability of the proteolytic enzymes can be achieved in aqueous liquid detergent concentrates of the invention, when the enzyme is added to the formulation as a slurry of the enzyme in a nonionic detergent which is normally liquid.
As described in our copending European patent application 91200677.2 (incorporated herein by reference), the enzyme slurry contains the enzyme in the dispersed form of e.g.
powder or particles suspended in a non-aqueous (nonionic) liquid surfactant, especially one which is substantially anhydrous. The enzyme particles may for example be spray-dried or lyophilized, and can for example be milled after spray-drying and before dispersion in (e.g. anhydrous) nonionic liquid detergent. Alternatively, they may be milled after dispersing the enzyme in the nonionic detergent.
r;; ~ s ~ , 11 C 6134 (R) The enzyme level in the slurry can be from about 0.5 to about 50~ by weight, e.g. from about 1 to about 20% by weight.
Commonly the enzyme slurry which is used in the manufacture of the compositions of the present invention is substantially anhydrous, with water content less than about 10%, preferably less than about 5% w/w, sometimes less than about 1%. Using this slurry technique it is possible to use a practically anhydrous liquid nonionic surfactant as the continuous phase of the slurry. The liquid state of the slurry enables a thorough mixing of the enzyme in the final liquid detergent, and allows easy liberation of the enzyme after dilution of the liquid detergent in the wash liquor.
The compositions of the invention may also contain other enzymes in addition to the proteases of the invention such as lipases, amylases and cellulases. When present, the enzymes may be used in an amount from 0.001% to 5% of the compositions.
Stabilizer As mentioned above, the stabilizer used according to the subject invention is a propionic acid added neat or propionic acid added as salt at a level of about 0.1 to about 15% of the composition.
It is within the scope of the present invention to incorporate further stabilizing systems for the enzymes, and for this purpose it is possible to use the measures set out in the specifications acknowledged by number above in connection with enzyme stabilization (~hich are specifically incorporated herein by reference).
There can for example be further included a quantity of an enzyme-stabilizing system e.g. selected from (a) an enzyme-stabilizing system comprising calcium and formate or acetate, and (b) a polyol-and-borate-containing enzyme-stabilizing system.
f~
12 c 6134 (R) Polyol at 2-25% w/w, e.g. glycerol or propylene glycol or other polyol, with sodium borate or borax at 2-15% w/w, may be used e.g. in compositions formulated according to EP-A-080 223 (Unilever) (incorporated herein by reference).
In addition or alternative~y, low-molecular weight mono carboxylates (in salt or aeid form) such as formate or acetate (0.1-10%), enzyme accessible calcium ions (0.1-1 mmole/kg) and lower alcohols e.g. ethanol or propylene glycol (up to 20%), may be used e.g. in eompositions formulated according to EP-A-028 865 (Procter & Gamble) (incorporated herein by reference).
It can be quite acceptable to use lesser quantities of these stabilizers than those pointed out by the above-cited specifications.
Calcium Salt The compositions of the invention may also comprise a calcium salt whieh is used to provide free calcium ions to the solution. The calcium ions impart stabilization to the enzyme either alone or in combination with the propionate. Examples of caleium salts whieh may provide free calcium ions to the system inelude calcium chloride dihydrate and calcium sulphate. The caleium salt may eomprise from 0.01 to 1% of the eomposition, preferably 0.01 to 0.2%, most preferably 0.03 to 0.1%.
Optional Components In addition to the essential ingredients described hereinbefore, the preferred compositions herein frequently contain a series of optional ingredients which are used for the known functionality in conventional levels. While the inventive compositions are premised on aqueous enzyme-containing detergent compositions, it is frequently desirable to use a phase regulant. This component together with water constitutes then the solvent matrix for the ~ 3 ~J ,~J
13 C 613~ (R) claimed liquid compositions. Suitable phase regulants are well-known in liquid detergent technology and, for example, can be represented by hydrotropes such as salts of alkyl arylsulphonates having up to 3 carbon atoms in the alkylgroup, e.g., sodium, potassium, ammonium and ethanolamine salts of xylene-, toluene-, ethylbenzene-, cumene-, and isopropylbenzene sulphonic acids. Alcohols may also be used as phase regulants. This phase regulant is frequently used in an amount from about 0.5% to about 20%, the sum of phase regulant and water is normally in the range from 35% to 65%.
The preferred compositions herein can contain a series of further optional ingredients which are mostly used in additive levels, usually below about 5%. Examples of the like additives include: polyacids, suds regulants, opacifiers, antioxidants, bactericides, dyes, perfumes, brighteners and the like.
The beneficial utilization of the claimed compositions under various usage conditions can require the utilization of a suds regulant. While generally all detergent suds regulants can be utilized, preferred for use herein are alkylated polysiloxanes such as dimethylpolysiloxane also frequently termed silicones. The silicones are frequently used in a level not exceeding 0.5%, most preferably between 0.01% and 0.2%.
It can also be desirable to utilize opacifiers inasmuch as they contribute to create a uniform appearance of the concentrated liquid detergent compositions. Examples of suitable opacifiers include: polystyrene co~mercially known as LYTRON 621 manufactured by MONSANTO CHEMICAL CORPORATION.
The opacifiers are frequently used in an amount from 0.3% to 1.5%.
f~
14 C 6134 (R) The compositions herein can also contain known antioxidants for their known utility, fre~uently radical scavengers in the art established levels, i.e. 0.001% to 0.25% (by reference to total composition). These antioxidants are frequently introduced in conjunction with fatty acids.
Another optional ingredient which may be used particularly in structured liquids, is a deflocculating polymer. In general, a deflocculating polymer comprises a hydrophobic backbone and one or more hydrophobic side chains, as described in EP-A-346 995 (Unilever) (incorporated herein by reference). They allow, if desired, the incorporation of greater amounts of surfactants and/or electrolytes than would otherwise be compatible with the need for a stable, low-viscosity product as well as the incorporation, if desired, of greater amounts of other ingredients to which lamellar dispersions are highly stability-sensitive.
The deflocculating polymer generally will comprise, when used, from about 0.1 to about 5% of the composition, preferably 0.1 to about 2% and most preferably, about 0.5 to about 1.5%.
Product pH
The pH of the liquid detergent compositions of the invention can be chosen at will from a wide range, e.g. from about pH 7 to about pH 12, e.g. a milder alkaline range from about pH
7.5 to about pH 9.5 or a stronger alkaline range from about pH 8.5 to about pH 11.5, preferably from above 8.5 to ll, and most preferably from 9 to 10.5.
The following examples are intended to illustrate the invention and facilitate its understanding and are not meant to limit the invention in any way.
C 6134 (R) In the Example~ the following abbreviations will be used:
LAS Sodium linear C12-alkyl benzene sulphonate LES Lauryl ether sulphate Nonionic Ethoxylated C12-C15 fatty alcohol Compositions of the Invention The compositions of the invention are as follows:
Composition A (Isotropic Non-Structured Composition~
10 Ingredients Weiqht LAS 10.0 Nonionic.9EO (Neodol 25-9) 8.0 LES (Neodol 25-3S) 6.0 Sodium xylene sulphonate 3.0 15 Builder 7.0 Triethanolamine 2.0 Monoethanolamine 2.0 Fatty acid 0.8 Protease (Savinase) 0.38 20 NaOH to pH 10 Carboxylic acid stabilizer (Na-salt) .31 molar*
Calcium chloride dihydrate .035 Water to 100%
* .31 molar corresponds to 2.1% by weight for formate, 2.6 by weight for acetate and 3.0% by weight for propionate.
Composition B (Structured, Built Composition~
Inqredients Weight LAS ~6.72 Nonionic, average 5E0 4.8 Sodium xylene sulphonate 0.8 35 Builder 23.85 Alkali metal salts 2.44 Protease 0.38 16 C 6134 (R) Minors plus water to 100%
Carboxylic acid stabilizer .31 Molar Calcium chloride dihydrate 0.1 pH 8.4 * Corresponding to 2.1% by weight formate, 2.5% by weight acetate, or 0% by weight propionate Composition C (Structured, Built Composition~
10 Incrredients Weight LAS 16.5 Nonionic, average 5E0 9.0 Builder 23.23 Fatty Acid 4.5 15 Alkali Metal Salts 10.5 Deflocculating polymer 1.0 Protease 0.38 Minors plus water to 100%
Carboxylic acid stabiliæer.31 Molar *
20 Calcium chloride dihydrate 0.1 pH 9.1 * Corresponding to 2.1% by weight formate, 2.6% by weight acetate, or 3.0% by weight propionate.
The liquid preparations were prepared according to the technique disclosecl in EP-A-346 995 and the deflocculating polymer corresponds to polymer All of that specification.
Compositions D and E (structured liquids, containinq a deflocculating polymer) D ` E
Nonionic.7E0 10 10 35 Sodium citrate 16.5 11.5 TriPthanolamine - -Na-carbonate 17 i,~ J ~o C 6134 (R) Na-propionate - 5 Protease 0.38 0.38 Deflocculating polymer Water & minors ... to 100%
pH 8.5 8.5 The liquid preparations were prepared according to the technique disclosed in EP-A-346 595 and the deflocculating polymer corresponds to polymer All of that specification.
Compositions F, G and H (structured liquids~ containing a deflocculatinq polymer) F G
L~S 28 28 28 15 Nonionic.7EO 12 12 12 Na-citrate 10 10 10 Triethanolamine 4 4 4 Na-propionate - 5 Na-acetate - - 7.7 20 Protease 0.38 0.38 0.38 Deflocculating polymer Water & minors ... to 100%
pH 9.3 9.3 9.3 The liquid preparations were prepared according to the technique disclosecl in EP-A-346 995 and the deflocculating polymer corresponds to polymer A11 of that specification.
Compositions K and L (structured liquids, containinq a 30 deflocculating polymer) L
LAS 28 ` 28 Nonionic.7E0 12 12 Na-citrate 8 g 35 Na-carbonate 4 4 Na-propionate - 5 Protease 0.38 0.38 18 ~ C~ C 6134 (R) Deflocculating polymer Water & minors ... to 100~ ...
pH 9.2 9.2 The liquid preparations were prepared according to the technique disclosed in EP-A-346 995 and the deflocculating polymer corresponds to polymer All of that specification.
Composition M (structured, built liquid) 10 Ingredients Weiqht LAS 6.7 Nonionic, average 5EO 4.8 Sodium xylene sulphonate 0.2 Builder 20.0 15 Alkali metal salts 6.5 Protease 0-3 Minors plus water to 100%
Carboxylic acid stabilizer0.52 Molar) Calcium chloride dihydrate 0.15 20 pH 8.5 )corresponding to 5% by weight of propionate COMPOSITION N (structured phosphate-built liquid) LAS 9.0 25 Nonionic.7EO 2.25 Pentasodium triphosphate 27.0 Sodium hydroxide 1~1 Enzyme preparation 0.5 Water Balance The pH of the composition was adjusted to 9Ø The composition was prepared in accordance with EP-A-266 199 (Unilever).
When equal mole percentages of the formate salt, acetate salt and propionate salt (i.e. 0.31 molar) were added and compared in Composition A above, stability results were as follows:
r,l f~
19 C 6134 (R) Carboxylate Salt Added Stability t1/2(days) none 5 formate 20 acetate 23 5 propionate 31 The stability of the protease was determined by measuring protease activity (spectopnotometric techniques using tetrapeptide substrate) as a function of storage time at 37C. Half-lives were determined by plotting Ao/At versus time and performing non-linear regression analysis.
These results establish that the half-life stability for Savinase in built anionic-rich detergent compositions having a pH higher than 8.5, preferably higher than 9.0, was superior when propionate was used compared to where either formate or acetate were used. The result was unexpected in view of the superior stability data for formate and acetate stabilizers relative to propionate in the art. It is clear that in the specifically defined compositions of the invention (anionic-rich, built compositions having defined pH
ranges), different results are found.
Equal mole percentages of formate salt, acetate salt and propionate salt (i.e. 0.31 molar) were added and tested in structured composition B and C above and the following results were observed:
30 Composition B
% Protease Carboxylate Activity Left %
Salt Added Protease After 215 hrs. Improvement none Savinase 44 35 formate Savinase 66 52 acetate Savinase 69 58 propionate Savinase 8185 ~, G~ J
20 C 6]34 (R) % Protease Carboxylate Activity Left %
Salt Added Protease After 215 hrs. Improvement none BPN' 17 5 formate BPN' 27 58 acetate BPN' 28 63 propionate BPNI 44 155 Composition C
% Protease Carboxylate Activity Left %
Salt Added Protease After 215 hrs. Improvement none BPN' 38 formate BPN' 49 27 15 acetate BPN' 48 24 propionate BPN' 59 55 These results show that propionate provides significant improvement in protease stability over time in structured, anionic rich compositions of defined pH. These results are unexpected in view of the teachings of the prior art.
Equal mole percentages of formate salt, acetate salt and propionate salt were tested in a composition essentially the same as structured Composition B except that the pH range was varied. The following results were observed:
Compos_tion B at PH 8.0 % Protease Carboxylate Activity Left After %
Salt Added ProteaseAbout 195 hrs.Improvement none BPN' 23 formate BPN' 36 55 35 acetate BPN' 36 55 propionate BPN' 51 118 21 f~i p~ C 6134 (R) Composition B at pH 8.6 ~ Protease arboxylate Activity Left After %
Salt Added Protease About 195 hrs. Improvement 5 none BPN' 21 formate BPN' 30 41 acetate BPN' 31 47 propionate BPN' 41 94 Composition B at pH 9.0 % Protease Carboxylate Actiyity Left After %
Salt Added Protease About 195 hrs. Improvement 15 none BPN' 17 formate BPN' 27 61 acetate BPN' 28 64 propionate BPN' 38 125 As can be clearly seen from the above results, an unexpected increase in stability, using propionate stabilizer relative to formate or acetate stabilizer, was observed across various pH ranges.
Stability of Savinase is determined in compositions D and E.
Savinase (ex NOVO-Nordisk) is added either as liquid concentrate or as a liquid nonionic-slurry; both preparations have 16 KNPU/g (XNPU = kilo NOVO Protease Units) proteolytic activity. The stability is expressed as half-life of deactivation (in days) at 37C.
Composition Stabiliser Savinase liquid Savinase slurry D none 2.1 25 35 E propionate 4.5 >>30 f .~
22 C 6134 (R) Stability of Savinase is determined in composition F, G and H. Savinase (ex NOVO-Nordisk) is added either as liquid concentrate or as a liquid nonionic-slurry; both preparations have 16 KNPU/g (KNPU = kilo NOVO Protease Units) proteolytic activity. The stability is expressed as half-life of deactivation (in weeks) at 37C.
Composition Stabiliser Savinase liquid Savinase slurry 10 F none 0.3 G acetate 0.6 nd H propionate 1.6 4 (nd = not determined) 15 Example 6 Stability of Savinase is determined in composition K and M
Savinase (ex NOVO-Nordisk) is added either as liquid concentrate or as a liquid nonionic-slurry; both preparations have 16 KNPU/g (KNPU = kilo NOVO Protease Units~ proteolytic activity. The stability is expressed as half-life of deactivation (in weeks) at 37~C.
Composition Stabiliser Savinase liquid Savinase slurry K none 0.5 3 25 L pro~ionate 0.8 7 Example 7 Stability of Savinase is determined in compositions F, G and H. Savinase (ex NOVO-Nordisk) is added either as liquid concentrate or as a liquid nonionic-slurry; both preparations have 16 KNPU/g ~KNPU = kilo NOVO Protease Units) proteolytic activity. The stability is expressed as half-life of deactivation (in weeks) at 37C.
Composition Stabiliser Savinase liquid Savinase slurry M none 0.5 1.5 M propionate 15 20 !~, . b~ ~,. : . ~ J
23 C 6134 (R) Example 8 Stability of Savinase is determined in composition N.
Savinase (ex NOVO-Nordisk) is added either as liquid concentrate or as a liquid nonionic-slurry; both preparations have 16 KNPU/g proteolytic activity. The stability is expressed as half-life of deactivation (in days) at 37 C.
Composition Stabiliser Savinase liquid Savinase slurry N none <<l <1 N propionate 3.4 4.5
Accordingly, the present invention provides a stable, aqueous enzymatic detergent composition comprising:
(a) from about 5 to about 65% by weight of a surfactant;
(b) from about 0.5 to about 50% by weight of a builder;
(c) a protease enzyme added in sufficient quantity to have an activity level of 0.01 to 200,000 GU/gm;
(d) from about 0.1 to about 15% by weight propionic acid or a propionic acid salt capable of forming propionic acid;
the remainder being water and minor ingredients;
wherein the pH of the composition is greater that 7Ø
Preferably, the pH of the composition is greater than 8.5, more preferably 9.0 and above.
The invention also provides a process for preparing such aqueous liquid enzymatic detergent compositions, wherein the proteolytic enzyme is preferably added in the form of a slurry of the enzyme in liquid nonionic surfactant.
DETAILED DESCRIPTION OF THE INVENTION
Detergent Active The compositions of the invention comprise from about 5% to about 65% by weight of (a) anionic surfactant or (b) anionic surfactant and one or more detergent actives wherein the ratio of anionic to non-anionic by weight is greater than 1 : 1 .
The detergent active material other than anionic surfactant may be an alkali metal or alkanolamine soap or a 10 to 24 carbon atom fatty acid, including polymerized fatty acids, or a nonionic, cationic, zwitterionic or amphoteric synthetic detergent material, or mixtures of any of these.
Examples of the anionic synthetic detergents are salts (including sodium, potassium, ammonium and substituted ammonium salts such as mono-, di and triethanolamine salts of 9 to 20 carbon alkylbenzenesulphonates, 8 to 22 carbon J
C 6134 (R) primary or secondary alkanesulphonates, 8 to 24 carbon olefinsulphonates, sulphonated polycarboxylic acids prepared by sulphonation of the pyrolyzed product of alkaline earth metal citrates, e.g., as described in GB-A-1 082 179, 8 to 22 carbon alkylsulphates, 8 to 24 carbon alkylpolyglycol-ether-sulphates, -carboxylates and -phosphates (containing up to 10 moles of ethylene oxide); further examples are described in "Surface Active Agents and Detergents" (Vol. I
and II) by Schwartz, Perry and Berch. Any suitable anionic may be used and the examples are not intended to be limiting in any way.
Examples of nonionic synthetic detergents which may be used with the invention are the condensation products of ethylene oxide, propylene oxide and/or butylene oxide with ~ to 18 carbon alkylphenols, 8 to 18 carbon primary or secondary aliphatic alcohols, 8 to 18 carbon fatty acid amides; further examples of nonionics include tertiary amine oxides with one 8 to 18 carbon alkyl chain and two 1 to 3 carbon alkyl chains. The above reference also describes further examples of nonionics.
The average number of moles of ethylene oxide and/or propylene oxide present in the above nonionics varies from 1-30; mixtures of various nonionics, including mixtures of nonionics with a lower and a higher degree of alkoxylation, may also be used. Preferred are ethoxylated C12-C15 fatty alcohols having 3-9 E0-groups, 5-7 E0-groups being especially preferred.
Examples of cationic detergents are the quaternary ammonium compounds such as alkyldimethylammonium halogenides.
Examples of amphoteric or zwitterionic detergents which may be used with the invention are N-alkylamino acids, sulphobetaines, condensation products of fatty acids with protein hydrolysates; but owing to their relatively high ~ ~ 3 ~ I ' 2 6 C 6134 (R) costs they are usually used in combination with an anionic or a nonionic detergent. Mixtures of the various types of active detergents may also be used, and preference is given to mixtures of an anionic and a nonionic detergent active. Soaps (in the form of their sodium, potassium and substituted ammonium salts) of fatty acids may also be used, preferably in conjunction with an anionic and/or nonionic synthetic detergent.
Among the compositions of the present invention are aqueous liquid detergents having for example a homogeneous physical character, e.g. they can consist of a micellar solution of surfactants in a continuous aqueous phase, so-called isotropic liquids.
Alternatively, they can have a heterogeneous physical phase and they can be structured, for example they can consist of a dispersion of lamellar droplets in a continuous aqueous phase, for example comprising a defloccuiating polymer having a hydrophilic backbone and at least one hydrophobic side chain, as described in EP-A-346 995 (Unilever) (incorporated herein by reference). These latter liquids are heterogeneous and may contain suspended solid particles such as particles of builder materia:Ls e.g. of the kinds mentioned below.
Builders Builders which can be used according to this invention include conventional alkaline detergency builders, inorganic or organic, which can be used at levels from about 0.5% to about 50% by weight of the composition, preferably from 3% to about 35% by weight. More particularly, when non-structured compositions are used, preferred amounts of ~ builder are 3 to 10% and when structured compositions are used, preferred amounts of builder are 5%-35% by weight.
By structured liquid composition is meant a composition in which at least some of the detergent active forms a f~ i J
7 C 6134 (R) structured phase. Preferably such structured phase is capable of suspending a solid particulate material.
More particularly, when a structured liquid is contemplated, the composition requires sufficient electrolyte to cause the formation of a lamellar phase by the surfactant to endow solid suspending capability. The selection of the particular type(s) and amount of electrolyte to bring this into being for a given choice of surfactant is effected using methodology very well known to those skilled in the art. It utilizes the particular techniques described in a wide variety of references. One such technique entails conducti~ity measurements. The detection of the presence of such a lamellar phase is also very well known and may be ef-fected by, for example, optical and electron microscopy orX-ray diffraction, supported by conductivity measurement.
As used herein, the term electrolyte means any water-soluble salt. The amount of electrolyte should be sufficient to cause formation of a lamellar phase by the surfactant to endow solid suspending capability. Preferably, the composition comprises at least 1.0% by weight, more preferably at least 5.0~ by weight, most preferably at least 17.0% by weight of electrolyte. The electrolyte may also be a detergency builder, such as the inorganic builder sodium tripoly-phosphate, or it may be a non-functional electrolyte such as sodium sulphate or chloride. Preferably, the inorganic builder comprises all or part of the electrolyte.
Such structured compositions are capable of suspending particulate solids, although particularly preferred are those systems where such solids are actually in suspension. The solids may be undissolved electrolyte, the same as or different from the electrolyte in solution, the latter being saturated in electrolyte. Additionally, or alternatively, they may be materials which are substantially insoluble in water alone. Examples of such substantially insoluble ~ 4~! f, ~,~
8 C 6134 (R) materials are aluminosilicate builders and particles of calcite abrasive.
Examples of suitable inorganic alkaline detergency builders which may be used (in structured or unstructured compositions) are water-soluble alkalimetal phosphates, polyphosphates, borates, silicates and also carbonat~s.
specific examples of such salts are sodium and potassium triphosphates, pyrophosphates, orthophosphates, hexametaphosphates, tetraborates, silicates and carbonates.
Examples of suitable organic alkaline detergency builder salts are: (1) water-soluble amino polycarboxylates, e.g., sodium and potassium ethylenediaminetetraacetates, nitrilotriacetates and N-(Z hydroxyethyl)-nitrilodiacetates;
(2) water-soluble salts of phytic acid, e.g., sodium and potassium phytates (see US-A-2 379 942); (3) water-soluble polyphosphonates, including specifically, sodium, potassium and lithium salts of ethane-;-hydroxy-l,l-diphosphonic acid;
sodium, potassium and lithium salts of methylene diphosphonic acid; sodium, potassium and lithium salts of ethylene diphosphonic acid; and sodium, potassium and lithium salts of ethane-1,1,2-triphosphonic acid. Other examples include the alkali metal salts of ethane-2-carboxy-1,1-diphosphonic acid hydroxymethane diphosphonic acid, carboxyldiphosphonic acid, ethane~l-hydroxy-1,1,2-triphosphonic acid, ethane-2-hydroxy-1,1,2-triphosphonic acid, propane-1,1,3,3-tetraphosphonic acid, propane-1,1,2,3-tetraphosphonic acid, and propane-1,2,2,3-tetraphosphonic acid; (4) water-soluble salts of polycarboxylate polymers and copolymers as described in US-A-3 308 067.
In addition, polycarboxylate builders can be used satis-factorily, including water-soluble salts of mellitic acid, citric acid, and carboxymethyloxysuccinic acid and salts of polymers of itaconic acid and maleic acid.
9 C 6134 (R) Certain zeolites or aluminosilicates can be used. One such aluminosilicate which is useful in the compositions of the invention is an amorphous water-insoluble hydrated compound, said amorphous material being characterized by a Mg++
exchange capacity of from about 50 mg eq. CaCG3/g and a particle diameter of from about 0.01 micron to about 5 microns. This ion-exchange builder is more fully described in GB-A-1 470 250.
A second water-insoluble synthetic aluminosilicate ion exchange material useful herein is crystalline in nature and has the formula Naz[(AlO2)y.(SiO2)].xH20, wherein z and y are integers of at least 6; the molar ratio of z to y is in the range from 1.0 to about 0.5, and x is an integer from about 15 to about 264; said aluminosilicate ion exchange material having a particle size diameter from about 0.1 micron to about 100 microns; a calcium ion exchange capacity on an anhydrous basis of at least about 200 milligrams equivalent of CaCO3 hardness per gram; and a calcium exchange rate on an anhydrous basis of at least about 2 grains/gallon/minute/
gram. These synthetic aluminosilicates are more fully described in GB-A-l 429 143.
The Enzymes The proteolytic enzyme used in the present invention can be of vegetable, animal or microorganism origin. Preferably, it is of the latter origin, which includes yeasts, fungi, moulds and bacteria. Parti.cularly preferred are bacterial subtilisin type proteases, obtained from e.g. particular strains of B.
subtilis and B. lioheniformis. Examples of suitable commercially available proteases are Alcalase, Savinase, Esperase, all of NOV0 Industri A/S; Maxatase and Maxacal of Gist-Brocades; Kazusase of Showa Denko; Subtilisin BPN' and Subtilisin BPN'-derived proteases and so on.
5enetic engineering of any of the above-mentioned enzymes can be achieved e.g. by extraction of an appropriate gene, and lo C 6134 (R) introduction and expression of the gene or derivative thereof in a suitable producer organism. EP-A-130 756 ~Genentech), ~P-A-214 435 (Henkel), W0 87/04461 (Amgen), Wo 87/05050 (Genex), EP-A-405 901 (Unilever) and EP-A-303 761 (Genentech) describe useful modified subtilisin proteases.
The amount of proteolytic enzyme included in the composition ranges from 0.01 to 200,000 GU/g, preferably from 1 to 100,000 GU/g, most preferably from 1000 to 50,000 GU/g, based on the final composition. Naturally, mixtures of different proteolytic enzymes may be used.
A GU is a glycine unit, which is the amount of proteolytic enzyme which under standard incubation conditions produces an amount of terminal NH2-groups equivalent to 1 microgramme/ml of glycine.
The proteolytic enzymes are usually added in the form of concentrated aqueous solutions. However, it has now surprisingly been found that even further improved stability of the proteolytic enzymes can be achieved in aqueous liquid detergent concentrates of the invention, when the enzyme is added to the formulation as a slurry of the enzyme in a nonionic detergent which is normally liquid.
As described in our copending European patent application 91200677.2 (incorporated herein by reference), the enzyme slurry contains the enzyme in the dispersed form of e.g.
powder or particles suspended in a non-aqueous (nonionic) liquid surfactant, especially one which is substantially anhydrous. The enzyme particles may for example be spray-dried or lyophilized, and can for example be milled after spray-drying and before dispersion in (e.g. anhydrous) nonionic liquid detergent. Alternatively, they may be milled after dispersing the enzyme in the nonionic detergent.
r;; ~ s ~ , 11 C 6134 (R) The enzyme level in the slurry can be from about 0.5 to about 50~ by weight, e.g. from about 1 to about 20% by weight.
Commonly the enzyme slurry which is used in the manufacture of the compositions of the present invention is substantially anhydrous, with water content less than about 10%, preferably less than about 5% w/w, sometimes less than about 1%. Using this slurry technique it is possible to use a practically anhydrous liquid nonionic surfactant as the continuous phase of the slurry. The liquid state of the slurry enables a thorough mixing of the enzyme in the final liquid detergent, and allows easy liberation of the enzyme after dilution of the liquid detergent in the wash liquor.
The compositions of the invention may also contain other enzymes in addition to the proteases of the invention such as lipases, amylases and cellulases. When present, the enzymes may be used in an amount from 0.001% to 5% of the compositions.
Stabilizer As mentioned above, the stabilizer used according to the subject invention is a propionic acid added neat or propionic acid added as salt at a level of about 0.1 to about 15% of the composition.
It is within the scope of the present invention to incorporate further stabilizing systems for the enzymes, and for this purpose it is possible to use the measures set out in the specifications acknowledged by number above in connection with enzyme stabilization (~hich are specifically incorporated herein by reference).
There can for example be further included a quantity of an enzyme-stabilizing system e.g. selected from (a) an enzyme-stabilizing system comprising calcium and formate or acetate, and (b) a polyol-and-borate-containing enzyme-stabilizing system.
f~
12 c 6134 (R) Polyol at 2-25% w/w, e.g. glycerol or propylene glycol or other polyol, with sodium borate or borax at 2-15% w/w, may be used e.g. in compositions formulated according to EP-A-080 223 (Unilever) (incorporated herein by reference).
In addition or alternative~y, low-molecular weight mono carboxylates (in salt or aeid form) such as formate or acetate (0.1-10%), enzyme accessible calcium ions (0.1-1 mmole/kg) and lower alcohols e.g. ethanol or propylene glycol (up to 20%), may be used e.g. in eompositions formulated according to EP-A-028 865 (Procter & Gamble) (incorporated herein by reference).
It can be quite acceptable to use lesser quantities of these stabilizers than those pointed out by the above-cited specifications.
Calcium Salt The compositions of the invention may also comprise a calcium salt whieh is used to provide free calcium ions to the solution. The calcium ions impart stabilization to the enzyme either alone or in combination with the propionate. Examples of caleium salts whieh may provide free calcium ions to the system inelude calcium chloride dihydrate and calcium sulphate. The caleium salt may eomprise from 0.01 to 1% of the eomposition, preferably 0.01 to 0.2%, most preferably 0.03 to 0.1%.
Optional Components In addition to the essential ingredients described hereinbefore, the preferred compositions herein frequently contain a series of optional ingredients which are used for the known functionality in conventional levels. While the inventive compositions are premised on aqueous enzyme-containing detergent compositions, it is frequently desirable to use a phase regulant. This component together with water constitutes then the solvent matrix for the ~ 3 ~J ,~J
13 C 613~ (R) claimed liquid compositions. Suitable phase regulants are well-known in liquid detergent technology and, for example, can be represented by hydrotropes such as salts of alkyl arylsulphonates having up to 3 carbon atoms in the alkylgroup, e.g., sodium, potassium, ammonium and ethanolamine salts of xylene-, toluene-, ethylbenzene-, cumene-, and isopropylbenzene sulphonic acids. Alcohols may also be used as phase regulants. This phase regulant is frequently used in an amount from about 0.5% to about 20%, the sum of phase regulant and water is normally in the range from 35% to 65%.
The preferred compositions herein can contain a series of further optional ingredients which are mostly used in additive levels, usually below about 5%. Examples of the like additives include: polyacids, suds regulants, opacifiers, antioxidants, bactericides, dyes, perfumes, brighteners and the like.
The beneficial utilization of the claimed compositions under various usage conditions can require the utilization of a suds regulant. While generally all detergent suds regulants can be utilized, preferred for use herein are alkylated polysiloxanes such as dimethylpolysiloxane also frequently termed silicones. The silicones are frequently used in a level not exceeding 0.5%, most preferably between 0.01% and 0.2%.
It can also be desirable to utilize opacifiers inasmuch as they contribute to create a uniform appearance of the concentrated liquid detergent compositions. Examples of suitable opacifiers include: polystyrene co~mercially known as LYTRON 621 manufactured by MONSANTO CHEMICAL CORPORATION.
The opacifiers are frequently used in an amount from 0.3% to 1.5%.
f~
14 C 6134 (R) The compositions herein can also contain known antioxidants for their known utility, fre~uently radical scavengers in the art established levels, i.e. 0.001% to 0.25% (by reference to total composition). These antioxidants are frequently introduced in conjunction with fatty acids.
Another optional ingredient which may be used particularly in structured liquids, is a deflocculating polymer. In general, a deflocculating polymer comprises a hydrophobic backbone and one or more hydrophobic side chains, as described in EP-A-346 995 (Unilever) (incorporated herein by reference). They allow, if desired, the incorporation of greater amounts of surfactants and/or electrolytes than would otherwise be compatible with the need for a stable, low-viscosity product as well as the incorporation, if desired, of greater amounts of other ingredients to which lamellar dispersions are highly stability-sensitive.
The deflocculating polymer generally will comprise, when used, from about 0.1 to about 5% of the composition, preferably 0.1 to about 2% and most preferably, about 0.5 to about 1.5%.
Product pH
The pH of the liquid detergent compositions of the invention can be chosen at will from a wide range, e.g. from about pH 7 to about pH 12, e.g. a milder alkaline range from about pH
7.5 to about pH 9.5 or a stronger alkaline range from about pH 8.5 to about pH 11.5, preferably from above 8.5 to ll, and most preferably from 9 to 10.5.
The following examples are intended to illustrate the invention and facilitate its understanding and are not meant to limit the invention in any way.
C 6134 (R) In the Example~ the following abbreviations will be used:
LAS Sodium linear C12-alkyl benzene sulphonate LES Lauryl ether sulphate Nonionic Ethoxylated C12-C15 fatty alcohol Compositions of the Invention The compositions of the invention are as follows:
Composition A (Isotropic Non-Structured Composition~
10 Ingredients Weiqht LAS 10.0 Nonionic.9EO (Neodol 25-9) 8.0 LES (Neodol 25-3S) 6.0 Sodium xylene sulphonate 3.0 15 Builder 7.0 Triethanolamine 2.0 Monoethanolamine 2.0 Fatty acid 0.8 Protease (Savinase) 0.38 20 NaOH to pH 10 Carboxylic acid stabilizer (Na-salt) .31 molar*
Calcium chloride dihydrate .035 Water to 100%
* .31 molar corresponds to 2.1% by weight for formate, 2.6 by weight for acetate and 3.0% by weight for propionate.
Composition B (Structured, Built Composition~
Inqredients Weight LAS ~6.72 Nonionic, average 5E0 4.8 Sodium xylene sulphonate 0.8 35 Builder 23.85 Alkali metal salts 2.44 Protease 0.38 16 C 6134 (R) Minors plus water to 100%
Carboxylic acid stabilizer .31 Molar Calcium chloride dihydrate 0.1 pH 8.4 * Corresponding to 2.1% by weight formate, 2.5% by weight acetate, or 0% by weight propionate Composition C (Structured, Built Composition~
10 Incrredients Weight LAS 16.5 Nonionic, average 5E0 9.0 Builder 23.23 Fatty Acid 4.5 15 Alkali Metal Salts 10.5 Deflocculating polymer 1.0 Protease 0.38 Minors plus water to 100%
Carboxylic acid stabiliæer.31 Molar *
20 Calcium chloride dihydrate 0.1 pH 9.1 * Corresponding to 2.1% by weight formate, 2.6% by weight acetate, or 3.0% by weight propionate.
The liquid preparations were prepared according to the technique disclosecl in EP-A-346 995 and the deflocculating polymer corresponds to polymer All of that specification.
Compositions D and E (structured liquids, containinq a deflocculating polymer) D ` E
Nonionic.7E0 10 10 35 Sodium citrate 16.5 11.5 TriPthanolamine - -Na-carbonate 17 i,~ J ~o C 6134 (R) Na-propionate - 5 Protease 0.38 0.38 Deflocculating polymer Water & minors ... to 100%
pH 8.5 8.5 The liquid preparations were prepared according to the technique disclosed in EP-A-346 595 and the deflocculating polymer corresponds to polymer All of that specification.
Compositions F, G and H (structured liquids~ containing a deflocculatinq polymer) F G
L~S 28 28 28 15 Nonionic.7EO 12 12 12 Na-citrate 10 10 10 Triethanolamine 4 4 4 Na-propionate - 5 Na-acetate - - 7.7 20 Protease 0.38 0.38 0.38 Deflocculating polymer Water & minors ... to 100%
pH 9.3 9.3 9.3 The liquid preparations were prepared according to the technique disclosecl in EP-A-346 995 and the deflocculating polymer corresponds to polymer A11 of that specification.
Compositions K and L (structured liquids, containinq a 30 deflocculating polymer) L
LAS 28 ` 28 Nonionic.7E0 12 12 Na-citrate 8 g 35 Na-carbonate 4 4 Na-propionate - 5 Protease 0.38 0.38 18 ~ C~ C 6134 (R) Deflocculating polymer Water & minors ... to 100~ ...
pH 9.2 9.2 The liquid preparations were prepared according to the technique disclosed in EP-A-346 995 and the deflocculating polymer corresponds to polymer All of that specification.
Composition M (structured, built liquid) 10 Ingredients Weiqht LAS 6.7 Nonionic, average 5EO 4.8 Sodium xylene sulphonate 0.2 Builder 20.0 15 Alkali metal salts 6.5 Protease 0-3 Minors plus water to 100%
Carboxylic acid stabilizer0.52 Molar) Calcium chloride dihydrate 0.15 20 pH 8.5 )corresponding to 5% by weight of propionate COMPOSITION N (structured phosphate-built liquid) LAS 9.0 25 Nonionic.7EO 2.25 Pentasodium triphosphate 27.0 Sodium hydroxide 1~1 Enzyme preparation 0.5 Water Balance The pH of the composition was adjusted to 9Ø The composition was prepared in accordance with EP-A-266 199 (Unilever).
When equal mole percentages of the formate salt, acetate salt and propionate salt (i.e. 0.31 molar) were added and compared in Composition A above, stability results were as follows:
r,l f~
19 C 6134 (R) Carboxylate Salt Added Stability t1/2(days) none 5 formate 20 acetate 23 5 propionate 31 The stability of the protease was determined by measuring protease activity (spectopnotometric techniques using tetrapeptide substrate) as a function of storage time at 37C. Half-lives were determined by plotting Ao/At versus time and performing non-linear regression analysis.
These results establish that the half-life stability for Savinase in built anionic-rich detergent compositions having a pH higher than 8.5, preferably higher than 9.0, was superior when propionate was used compared to where either formate or acetate were used. The result was unexpected in view of the superior stability data for formate and acetate stabilizers relative to propionate in the art. It is clear that in the specifically defined compositions of the invention (anionic-rich, built compositions having defined pH
ranges), different results are found.
Equal mole percentages of formate salt, acetate salt and propionate salt (i.e. 0.31 molar) were added and tested in structured composition B and C above and the following results were observed:
30 Composition B
% Protease Carboxylate Activity Left %
Salt Added Protease After 215 hrs. Improvement none Savinase 44 35 formate Savinase 66 52 acetate Savinase 69 58 propionate Savinase 8185 ~, G~ J
20 C 6]34 (R) % Protease Carboxylate Activity Left %
Salt Added Protease After 215 hrs. Improvement none BPN' 17 5 formate BPN' 27 58 acetate BPN' 28 63 propionate BPNI 44 155 Composition C
% Protease Carboxylate Activity Left %
Salt Added Protease After 215 hrs. Improvement none BPN' 38 formate BPN' 49 27 15 acetate BPN' 48 24 propionate BPN' 59 55 These results show that propionate provides significant improvement in protease stability over time in structured, anionic rich compositions of defined pH. These results are unexpected in view of the teachings of the prior art.
Equal mole percentages of formate salt, acetate salt and propionate salt were tested in a composition essentially the same as structured Composition B except that the pH range was varied. The following results were observed:
Compos_tion B at PH 8.0 % Protease Carboxylate Activity Left After %
Salt Added ProteaseAbout 195 hrs.Improvement none BPN' 23 formate BPN' 36 55 35 acetate BPN' 36 55 propionate BPN' 51 118 21 f~i p~ C 6134 (R) Composition B at pH 8.6 ~ Protease arboxylate Activity Left After %
Salt Added Protease About 195 hrs. Improvement 5 none BPN' 21 formate BPN' 30 41 acetate BPN' 31 47 propionate BPN' 41 94 Composition B at pH 9.0 % Protease Carboxylate Actiyity Left After %
Salt Added Protease About 195 hrs. Improvement 15 none BPN' 17 formate BPN' 27 61 acetate BPN' 28 64 propionate BPN' 38 125 As can be clearly seen from the above results, an unexpected increase in stability, using propionate stabilizer relative to formate or acetate stabilizer, was observed across various pH ranges.
Stability of Savinase is determined in compositions D and E.
Savinase (ex NOVO-Nordisk) is added either as liquid concentrate or as a liquid nonionic-slurry; both preparations have 16 KNPU/g (XNPU = kilo NOVO Protease Units) proteolytic activity. The stability is expressed as half-life of deactivation (in days) at 37C.
Composition Stabiliser Savinase liquid Savinase slurry D none 2.1 25 35 E propionate 4.5 >>30 f .~
22 C 6134 (R) Stability of Savinase is determined in composition F, G and H. Savinase (ex NOVO-Nordisk) is added either as liquid concentrate or as a liquid nonionic-slurry; both preparations have 16 KNPU/g (KNPU = kilo NOVO Protease Units) proteolytic activity. The stability is expressed as half-life of deactivation (in weeks) at 37C.
Composition Stabiliser Savinase liquid Savinase slurry 10 F none 0.3 G acetate 0.6 nd H propionate 1.6 4 (nd = not determined) 15 Example 6 Stability of Savinase is determined in composition K and M
Savinase (ex NOVO-Nordisk) is added either as liquid concentrate or as a liquid nonionic-slurry; both preparations have 16 KNPU/g (KNPU = kilo NOVO Protease Units~ proteolytic activity. The stability is expressed as half-life of deactivation (in weeks) at 37~C.
Composition Stabiliser Savinase liquid Savinase slurry K none 0.5 3 25 L pro~ionate 0.8 7 Example 7 Stability of Savinase is determined in compositions F, G and H. Savinase (ex NOVO-Nordisk) is added either as liquid concentrate or as a liquid nonionic-slurry; both preparations have 16 KNPU/g ~KNPU = kilo NOVO Protease Units) proteolytic activity. The stability is expressed as half-life of deactivation (in weeks) at 37C.
Composition Stabiliser Savinase liquid Savinase slurry M none 0.5 1.5 M propionate 15 20 !~, . b~ ~,. : . ~ J
23 C 6134 (R) Example 8 Stability of Savinase is determined in composition N.
Savinase (ex NOVO-Nordisk) is added either as liquid concentrate or as a liquid nonionic-slurry; both preparations have 16 KNPU/g proteolytic activity. The stability is expressed as half-life of deactivation (in days) at 37 C.
Composition Stabiliser Savinase liquid Savinase slurry N none <<l <1 N propionate 3.4 4.5
Claims (9)
1. A stable aqueous enzymatic detergent composition comprising:
(a) from about 5 to about 65% by weight of a surfactant;
(b) from about 0.5 to about 50% by weight of a builder;
(c) a protease enzyme added in sufficient quantity to have an activity level of 0.01 to 200,000 GU/gm;
(d) from about 0.1 to about 15% by weight propionic acid or a propionic acid salt capable of forming propionic acid;
the remainder being water and minor ingredients;
wherein the pH of the composition is greater that 7Ø
(a) from about 5 to about 65% by weight of a surfactant;
(b) from about 0.5 to about 50% by weight of a builder;
(c) a protease enzyme added in sufficient quantity to have an activity level of 0.01 to 200,000 GU/gm;
(d) from about 0.1 to about 15% by weight propionic acid or a propionic acid salt capable of forming propionic acid;
the remainder being water and minor ingredients;
wherein the pH of the composition is greater that 7Ø
2. A composition according to claim 1, wherein the surfactant is an anionic surfactant.
3. A composition according to claim 1, wherein the surfactant is a mixture of an anionic surfactant and one or more detergent actives, the ratio of anionic to non-anionic by weight being greater than 1:1.
4. A composition according to claim 1, wherein if the composition is structured, 5 to 35% by weight builder is used.
5. A composition according to claim 1, wherein if the composition is not structured, 3 to 10% builder is used.
6. A stable aqueous enzymatic detergent composition according to claim 1, further comprising from about 0.1 to about 5% of a deflocculating polymer.
7. A stable aqueous enzymatic detergent composition according to claim 1, further comprising from about 0.01 to about 1% of a calcium salt.
C 6134 (R)
C 6134 (R)
8. Process for preparing an aqueous liquid enzymatic detergent composition according to claim 1, wherein the proteolytic enzyme is added in the form of a slurry of the enzyme in liquid nonionic surfactant.
9. A stable aqueous enzymatic detergent as claimed in claim one and substantially as described herein.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US55922290A | 1990-07-27 | 1990-07-27 | |
US559,222 | 1990-07-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2047532A1 true CA2047532A1 (en) | 1992-01-28 |
Family
ID=24232781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002047532A Abandoned CA2047532A1 (en) | 1990-07-27 | 1991-07-22 | Protease-containing liquid detergent compositions |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0476726A1 (en) |
JP (1) | JPH04234000A (en) |
KR (1) | KR920002763A (en) |
AU (1) | AU642276B2 (en) |
BR (1) | BR9103184A (en) |
CA (1) | CA2047532A1 (en) |
TR (1) | TR27610A (en) |
TW (1) | TW222015B (en) |
ZA (1) | ZA915889B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0471410A3 (en) * | 1990-08-15 | 1992-07-01 | Unilever Nv | Structured liquid detergent compositions containing subtilisin mutants |
JP2000169897A (en) * | 1998-12-04 | 2000-06-20 | Kao Corp | Liquid detergent composition |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0028865B2 (en) * | 1979-11-09 | 1989-03-15 | THE PROCTER & GAMBLE COMPANY | Homogeneous enzyme-containing liquid detergent compositions containing saturated fatty acids |
US4497897A (en) * | 1982-12-09 | 1985-02-05 | Novo Industri A/S | Liquid proteinase concentrate and method for preparation |
ZA865096B (en) * | 1985-07-26 | 1988-02-24 | Colgate Palmolive Co | Stabilized built liquid detergent composition containing enzymes |
US4797223A (en) * | 1988-01-11 | 1989-01-10 | Rohm And Haas Company | Water soluble polymers for detergent compositions |
GB8900496D0 (en) * | 1989-01-10 | 1989-03-08 | Procter & Gamble | Liquid detergent composition containing enzyme and enzyme stabilization system |
GB8928022D0 (en) * | 1989-12-12 | 1990-02-14 | Unilever Plc | Enzymatic liquid detergent compositions and their use |
-
1991
- 1991-07-11 EP EP19910201816 patent/EP0476726A1/en not_active Ceased
- 1991-07-22 CA CA002047532A patent/CA2047532A1/en not_active Abandoned
- 1991-07-24 AU AU81274/91A patent/AU642276B2/en not_active Ceased
- 1991-07-25 BR BR919103184A patent/BR9103184A/en not_active Application Discontinuation
- 1991-07-26 TR TR00755/91A patent/TR27610A/en unknown
- 1991-07-26 ZA ZA915889A patent/ZA915889B/en unknown
- 1991-07-26 JP JP3187773A patent/JPH04234000A/en active Pending
- 1991-07-27 KR KR1019910012957A patent/KR920002763A/en not_active Application Discontinuation
- 1991-09-18 TW TW080107397A patent/TW222015B/zh active
Also Published As
Publication number | Publication date |
---|---|
TR27610A (en) | 1995-06-13 |
JPH04234000A (en) | 1992-08-21 |
TW222015B (en) | 1994-04-01 |
AU8127491A (en) | 1992-01-30 |
ZA915889B (en) | 1993-03-31 |
KR920002763A (en) | 1992-02-28 |
AU642276B2 (en) | 1993-10-14 |
BR9103184A (en) | 1992-05-05 |
EP0476726A1 (en) | 1992-03-25 |
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