CA2023309A1 - Granulated bleach activator particles - Google Patents
Granulated bleach activator particlesInfo
- Publication number
- CA2023309A1 CA2023309A1 CA002023309A CA2023309A CA2023309A1 CA 2023309 A1 CA2023309 A1 CA 2023309A1 CA 002023309 A CA002023309 A CA 002023309A CA 2023309 A CA2023309 A CA 2023309A CA 2023309 A1 CA2023309 A1 CA 2023309A1
- Authority
- CA
- Canada
- Prior art keywords
- weight
- composition according
- water
- bleach activator
- bleach
- 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
- 239000007844 bleaching agent Substances 0.000 title claims abstract description 84
- 239000012190 activator Substances 0.000 title claims abstract description 59
- 239000002245 particle Substances 0.000 title description 8
- 239000000203 mixture Substances 0.000 claims abstract description 66
- 239000008187 granular material Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000002243 precursor Substances 0.000 claims abstract description 14
- 150000004965 peroxy acids Chemical class 0.000 claims abstract description 11
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 8
- -1 peroxide compound Chemical class 0.000 claims description 45
- 125000004432 carbon atom Chemical group C* 0.000 claims description 23
- 150000003839 salts Chemical class 0.000 claims description 20
- 125000000217 alkyl group Chemical group 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 14
- 229920001577 copolymer Polymers 0.000 claims description 13
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical group [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 12
- 238000001694 spray drying Methods 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 11
- 239000004094 surface-active agent Substances 0.000 claims description 11
- 229920002125 Sokalan® Polymers 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 10
- 238000004061 bleaching Methods 0.000 claims description 9
- 230000002378 acidificating effect Effects 0.000 claims description 8
- 125000000129 anionic group Chemical group 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000002736 nonionic surfactant Substances 0.000 claims description 7
- 239000003945 anionic surfactant Substances 0.000 claims description 6
- 150000004967 organic peroxy acids Chemical class 0.000 claims description 6
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 6
- 235000011152 sodium sulphate Nutrition 0.000 claims description 6
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 4
- 239000004584 polyacrylic acid Substances 0.000 claims description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052794 bromium Inorganic materials 0.000 claims description 3
- 239000003093 cationic surfactant Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229920002845 Poly(methacrylic acid) Polymers 0.000 claims description 2
- 125000002091 cationic group Chemical group 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000002563 ionic surfactant Substances 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 2
- 125000000547 substituted alkyl group Chemical group 0.000 claims description 2
- 239000002888 zwitterionic surfactant Substances 0.000 claims description 2
- 150000001735 carboxylic acids Chemical class 0.000 claims 1
- VVTMNCICAIKIRN-UHFFFAOYSA-N phenyl benzoate;sodium Chemical group [Na].C=1C=CC=CC=1C(=O)OC1=CC=CC=C1 VVTMNCICAIKIRN-UHFFFAOYSA-N 0.000 claims 1
- 238000004090 dissolution Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 3
- 239000003599 detergent Substances 0.000 description 16
- 239000011734 sodium Substances 0.000 description 12
- 229910052708 sodium Inorganic materials 0.000 description 12
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group 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
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 9
- 229910052783 alkali metal Inorganic materials 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 150000001340 alkali metals Chemical class 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 235000014113 dietary fatty acids Nutrition 0.000 description 5
- 239000000194 fatty acid Substances 0.000 description 5
- 229930195729 fatty acid Natural products 0.000 description 5
- 229920001983 poloxamer Polymers 0.000 description 5
- 239000003760 tallow Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- 150000004996 alkyl benzenes Chemical class 0.000 description 4
- 239000007859 condensation product Substances 0.000 description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 4
- 239000001993 wax Substances 0.000 description 4
- YGUMVDWOQQJBGA-VAWYXSNFSA-N 5-[(4-anilino-6-morpholin-4-yl-1,3,5-triazin-2-yl)amino]-2-[(e)-2-[4-[(4-anilino-6-morpholin-4-yl-1,3,5-triazin-2-yl)amino]-2-sulfophenyl]ethenyl]benzenesulfonic acid Chemical compound C=1C=C(\C=C\C=2C(=CC(NC=3N=C(N=C(NC=4C=CC=CC=4)N=3)N3CCOCC3)=CC=2)S(O)(=O)=O)C(S(=O)(=O)O)=CC=1NC(N=C(N=1)N2CCOCC2)=NC=1NC1=CC=CC=C1 YGUMVDWOQQJBGA-VAWYXSNFSA-N 0.000 description 3
- 108090000790 Enzymes Proteins 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 235000019864 coconut oil Nutrition 0.000 description 3
- 239000003240 coconut oil Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 229920001519 homopolymer Polymers 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 150000002989 phenols Chemical class 0.000 description 3
- 235000021317 phosphate Nutrition 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 150000003138 primary alcohols Chemical class 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000000344 soap Substances 0.000 description 3
- 235000019832 sodium triphosphate Nutrition 0.000 description 3
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 2
- PTHBKNSHSCMKBV-UHFFFAOYSA-N 4,6,8-trihydroxy-3-(2-hydroxyethyl)-2,3-dihydronaphtho[2,3-f][1]benzofuran-5,10-dione Chemical compound O=C1C2=CC(O)=CC(O)=C2C(=O)C2=C1C=C1OCC(CCO)C1=C2O PTHBKNSHSCMKBV-UHFFFAOYSA-N 0.000 description 2
- GAWIXWVDTYZWAW-UHFFFAOYSA-N C[CH]O Chemical group C[CH]O GAWIXWVDTYZWAW-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- BGRWYDHXPHLNKA-UHFFFAOYSA-N Tetraacetylethylenediamine Chemical compound CC(=O)N(C(C)=O)CCN(C(C)=O)C(C)=O BGRWYDHXPHLNKA-UHFFFAOYSA-N 0.000 description 2
- 239000001083 [(2R,3R,4S,5R)-1,2,4,5-tetraacetyloxy-6-oxohexan-3-yl] acetate Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 235000019820 disodium diphosphate Nutrition 0.000 description 2
- GYQBBRRVRKFJRG-UHFFFAOYSA-L disodium pyrophosphate Chemical compound [Na+].[Na+].OP([O-])(=O)OP(O)([O-])=O GYQBBRRVRKFJRG-UHFFFAOYSA-L 0.000 description 2
- DUYCTCQXNHFCSJ-UHFFFAOYSA-N dtpmp Chemical compound OP(=O)(O)CN(CP(O)(O)=O)CCN(CP(O)(=O)O)CCN(CP(O)(O)=O)CP(O)(O)=O DUYCTCQXNHFCSJ-UHFFFAOYSA-N 0.000 description 2
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 125000001453 quaternary ammonium group Chemical group 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- QSKQNALVHFTOQX-UHFFFAOYSA-M sodium nonanoyloxybenzenesulfonate Chemical compound [Na+].CCCCCCCCC(=O)OC1=CC=CC=C1S([O-])(=O)=O QSKQNALVHFTOQX-UHFFFAOYSA-M 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- 239000000375 suspending agent Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- PTHBKNSHSCMKBV-ZETCQYMHSA-N versicol Natural products OCC[C@H]1COc2cc3C(=O)c4cc(O)cc(O)c4C(=O)c3c(O)c12 PTHBKNSHSCMKBV-ZETCQYMHSA-N 0.000 description 2
- 239000001124 (E)-prop-1-ene-1,2,3-tricarboxylic acid Substances 0.000 description 1
- QBIAZVPERXOGAL-OWOJBTEDSA-N (e)-prop-1-ene-1,3-diamine Chemical compound NC\C=C\N QBIAZVPERXOGAL-OWOJBTEDSA-N 0.000 description 1
- PGHYAIXOPQQRJA-CLFYSBASSA-N (z)-2-benzylbut-2-enedioic acid Chemical compound OC(=O)\C=C(C(O)=O)\CC1=CC=CC=C1 PGHYAIXOPQQRJA-CLFYSBASSA-N 0.000 description 1
- CQNPSIAJXGEDQS-VURMDHGXSA-N (z)-2-phenylbut-2-enedioic acid Chemical compound OC(=O)\C=C(/C(O)=O)C1=CC=CC=C1 CQNPSIAJXGEDQS-VURMDHGXSA-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
- GLVYLTSKTCWWJR-UHFFFAOYSA-N 2-carbonoperoxoylbenzoic acid Chemical compound OOC(=O)C1=CC=CC=C1C(O)=O GLVYLTSKTCWWJR-UHFFFAOYSA-N 0.000 description 1
- FEWFXBUNENSNBQ-UHFFFAOYSA-N 2-hydroxyacrylic acid Chemical compound OC(=C)C(O)=O FEWFXBUNENSNBQ-UHFFFAOYSA-N 0.000 description 1
- PSZAEHPBBUYICS-UHFFFAOYSA-N 2-methylidenepropanedioic acid Chemical compound OC(=O)C(=C)C(O)=O PSZAEHPBBUYICS-UHFFFAOYSA-N 0.000 description 1
- XSVSPKKXQGNHMD-UHFFFAOYSA-N 5-bromo-3-methyl-1,2-thiazole Chemical compound CC=1C=C(Br)SN=1 XSVSPKKXQGNHMD-UHFFFAOYSA-N 0.000 description 1
- BSYNRYMUTXBXSQ-FOQJRBATSA-N 59096-14-9 Chemical compound CC(=O)OC1=CC=CC=C1[14C](O)=O BSYNRYMUTXBXSQ-FOQJRBATSA-N 0.000 description 1
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- CKSYEJTXXXFCEV-UHFFFAOYSA-N C1(=CC=CC=C1)S(=O)(=O)OOC(C1=CC=CC=C1)=O.[Na] Chemical compound C1(=CC=CC=C1)S(=O)(=O)OOC(C1=CC=CC=C1)=O.[Na] CKSYEJTXXXFCEV-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 239000001692 EU approved anti-caking agent Substances 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- CODXQVBTPQLAGA-UHFFFAOYSA-N Hydroxydecanoate Chemical compound CCCCCCCCCC(=O)OO CODXQVBTPQLAGA-UHFFFAOYSA-N 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 description 1
- 229910000503 Na-aluminosilicate Inorganic materials 0.000 description 1
- CVXHBROPWMVEQO-UHFFFAOYSA-N Peroxyoctanoic acid Chemical compound CCCCCCCC(=O)OO CVXHBROPWMVEQO-UHFFFAOYSA-N 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical class OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical class O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- UAOKXEHOENRFMP-ZJIFWQFVSA-N [(2r,3r,4s,5r)-2,3,4,5-tetraacetyloxy-6-oxohexyl] acetate Chemical compound CC(=O)OC[C@@H](OC(C)=O)[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](OC(C)=O)C=O UAOKXEHOENRFMP-ZJIFWQFVSA-N 0.000 description 1
- BPPGLUCINRNKQV-UHFFFAOYSA-N [Na].CC(=O)OOS(=O)(=O)C1=CC=CC=C1 Chemical compound [Na].CC(=O)OOS(=O)(=O)C1=CC=CC=C1 BPPGLUCINRNKQV-UHFFFAOYSA-N 0.000 description 1
- FRTNIYVUDIHXPG-UHFFFAOYSA-N acetic acid;ethane-1,2-diamine Chemical class CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.NCCN FRTNIYVUDIHXPG-UHFFFAOYSA-N 0.000 description 1
- 229940091181 aconitic acid Drugs 0.000 description 1
- 125000002252 acyl group Chemical group 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical group 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000002877 alkyl aryl group Chemical group 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 125000002648 azanetriyl group Chemical group *N(*)* 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- DRZOELSSQWENBA-UHFFFAOYSA-N benzene-1,2-dicarboperoxoic acid Chemical compound OOC(=O)C1=CC=CC=C1C(=O)OO DRZOELSSQWENBA-UHFFFAOYSA-N 0.000 description 1
- VAIFPCUQBLOXJW-UHFFFAOYSA-N benzenesulfonyl benzenecarboperoxoate Chemical compound C=1C=CC=CC=1C(=O)OOS(=O)(=O)C1=CC=CC=C1 VAIFPCUQBLOXJW-UHFFFAOYSA-N 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid group Chemical group C(C1=CC=CC=C1)(=O)O WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 150000007942 carboxylates Chemical group 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- GTZCVFVGUGFEME-IWQZZHSRSA-N cis-aconitic acid Chemical compound OC(=O)C\C(C(O)=O)=C\C(O)=O GTZCVFVGUGFEME-IWQZZHSRSA-N 0.000 description 1
- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 1
- 229940018557 citraconic acid Drugs 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229940096386 coconut alcohol Drugs 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- VTIIJXUACCWYHX-UHFFFAOYSA-L disodium;carboxylatooxy carbonate Chemical compound [Na+].[Na+].[O-]C(=O)OOC([O-])=O VTIIJXUACCWYHX-UHFFFAOYSA-L 0.000 description 1
- JHUXOSATQXGREM-UHFFFAOYSA-N dodecanediperoxoic acid Chemical compound OOC(=O)CCCCCCCCCCC(=O)OO JHUXOSATQXGREM-UHFFFAOYSA-N 0.000 description 1
- BRDYCNFHFWUBCZ-UHFFFAOYSA-N dodecaneperoxoic acid Chemical compound CCCCCCCCCCCC(=O)OO BRDYCNFHFWUBCZ-UHFFFAOYSA-N 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- UZABCLFSICXBCM-UHFFFAOYSA-N ethoxy hydrogen sulfate Chemical compound CCOOS(O)(=O)=O UZABCLFSICXBCM-UHFFFAOYSA-N 0.000 description 1
- 238000007046 ethoxylation reaction Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 235000019197 fats Nutrition 0.000 description 1
- 235000021323 fish oil Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 125000005456 glyceride group Chemical group 0.000 description 1
- 239000008202 granule composition Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004900 laundering Methods 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000012423 maintenance Methods 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
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- HNEGQIOMVPPMNR-NSCUHMNNSA-N mesaconic acid Chemical compound OC(=O)C(/C)=C/C(O)=O HNEGQIOMVPPMNR-NSCUHMNNSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 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
- HNEGQIOMVPPMNR-UHFFFAOYSA-N methylfumaric acid Natural products OC(=O)C(C)=CC(O)=O HNEGQIOMVPPMNR-UHFFFAOYSA-N 0.000 description 1
- 108010020132 microbial serine proteinases Proteins 0.000 description 1
- 239000004200 microcrystalline wax Substances 0.000 description 1
- 235000019808 microcrystalline wax Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- SXLLDUPXUVRMEE-UHFFFAOYSA-N nonanediperoxoic acid Chemical compound OOC(=O)CCCCCCCC(=O)OO SXLLDUPXUVRMEE-UHFFFAOYSA-N 0.000 description 1
- 230000000269 nucleophilic effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 235000019809 paraffin wax Nutrition 0.000 description 1
- 230000035515 penetration Effects 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
- 150000002978 peroxides Chemical class 0.000 description 1
- 125000000864 peroxy group Chemical group O(O*)* 0.000 description 1
- 125000005342 perphosphate group Chemical group 0.000 description 1
- 235000019271 petrolatum Nutrition 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N phthalic anhydride Chemical class C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000429 sodium aluminium silicate Substances 0.000 description 1
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- DZCAZXAJPZCSCU-UHFFFAOYSA-K sodium nitrilotriacetate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CC([O-])=O DZCAZXAJPZCSCU-UHFFFAOYSA-K 0.000 description 1
- 229960001922 sodium perborate Drugs 0.000 description 1
- 229940045872 sodium percarbonate Drugs 0.000 description 1
- OVONNAXAHAIEDF-UHFFFAOYSA-M sodium;4-benzoyloxybenzenesulfonate Chemical compound [Na+].C1=CC(S(=O)(=O)[O-])=CC=C1OC(=O)C1=CC=CC=C1 OVONNAXAHAIEDF-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003019 stabilising effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical compound OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000000271 synthetic detergent Substances 0.000 description 1
- 150000004685 tetrahydrates Chemical class 0.000 description 1
- GTZCVFVGUGFEME-UHFFFAOYSA-N trans-aconitic acid Natural products OC(=O)CC(C(O)=O)=CC(O)=O GTZCVFVGUGFEME-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- AQLJVWUFPCUVLO-UHFFFAOYSA-N urea hydrogen peroxide Chemical compound OO.NC(N)=O AQLJVWUFPCUVLO-UHFFFAOYSA-N 0.000 description 1
- 239000004108 vegetable carbon Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 229910052727 yttrium Inorganic materials 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
- C11D3/39—Organic or inorganic per-compounds
- C11D3/3902—Organic or inorganic per-compounds combined with specific additives
- C11D3/3905—Bleach activators or bleach catalysts
- C11D3/3935—Bleach activators or bleach catalysts granulated, coated or protected
-
- 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
- C11D11/00—Special methods for preparing compositions containing mixtures of detergents
- C11D11/02—Preparation in the form of powder by spray drying
-
- 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
- C11D3/39—Organic or inorganic per-compounds
- C11D3/3902—Organic or inorganic per-compounds combined with specific additives
- C11D3/3905—Bleach activators or bleach catalysts
- C11D3/3907—Organic compounds
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)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
ABSTRACT
Stable bleach activator composition in the form of spray-dried granules comprising from 50-98% by weight of a water-soluble peroxyacid bleach precursor, from 2-50%
by weight of a film-forming polymeric material, and from 0-48% by weight of an inert organic or inorganic salt.
The spray-dried bleach activator granules show the combined characteristics of excellent storage stability, improved mechanical strength and attrition resistance, as well as good dispersibility and dissolution rate.
Bleach and laundry compositions containing the bleach activator granules are also disclosed.
Stable bleach activator composition in the form of spray-dried granules comprising from 50-98% by weight of a water-soluble peroxyacid bleach precursor, from 2-50%
by weight of a film-forming polymeric material, and from 0-48% by weight of an inert organic or inorganic salt.
The spray-dried bleach activator granules show the combined characteristics of excellent storage stability, improved mechanical strength and attrition resistance, as well as good dispersibility and dissolution rate.
Bleach and laundry compositions containing the bleach activator granules are also disclosed.
Description
C 7197 OR) GRANULATED BLEACH ACTIVATOR PARTICLES
Technical field This invention relates to bleach activator granules, method of making such granules and use thereof in bleaching and/or detergent compositions. More particularly it relates to improved bleach activator particles prepared by spray-drying for use in or with a detergent and/or bleach composition.
Backqround and prior art It is well known that peroxide compounds, such as perborates, percarbonates, perphosphates and persilicates, are highly useful for chemical bleaching of stains found on both coloured and white fabrics, and are thus also useful as bleaching agents for incorporation in laundry detergent compositions. Said peroxide compounds are most effective at high wash temperatures, i.e. at or near the boil wash temperature, .
but are substantially ineffective at lower temperatures of e.g. below 60~C. Many substances are known in the art which are referred to as bleach activators rendering peroxide compound bleaches effective at bleach solution temperatures of below 60C, by forming an organic peroxyacid in situ. A bleach activator can thus generally be described as an organic peroxyacid bleach precursor which in the bleaching solution reacts with the inorganic or organic peroxide compound, thereby releasing the corresponding peroxyacid.
Many such bleach activators are known in the art, most ox which contain perhydrolysable N-acyl or O-acyl ; residues. Examples of these include both the water-insoluble compounds such as succinic, benzoic and phthalic anhydrides, N,N,N',N'-tetraacetyl-ethylene C 7197 (R) diamine (TAED) and tetraacetyl-glycoluril (TAGU), as well as the water-soluble compounds such as acetyl salicylic acid, glucose penta-acetate (GPA), and the various esters of phenols and substituted phenols, e.g.
sodium acetoxy benzene sulphonate (SABS), sodium benzoyloxy benzene sulphonate (SBOBS) and sodium nonanoyloxy benzene sulphonate (SNOBS).
Hydrolytic instability requires that these bleach activators be protected from the surrounding media, e.g.
when incorporated in detergent compositions, particularly from moisture and alkaline ingredients. On the other hand, any proper method ox protecting the bleach activator from chemical attack must still allow a relatively quick release or dissolution of the activator in the wash liquor so as to enable the beneficial reaction with the peroxide compound to occur without undue delay The most common way of protecting bleach activators is by methods wherein the powdered bleach activator material is presented in the form of agglomerated, granulated and/or coated particles Spray-drying is another route which has been proposed to convert bleach activators into a useful particulate product form.
It is known to prepare granules of water-insoluble bleach activators, e.g. TAED, TAGU, by spray-drying an aqueous slurry comprising said water-insoluble bleach activator (see US Patent 4,4S7,858). It is also known to incorporate water-insoluble bleach activators in a detergent slurry for spray-drying (see GB-A-l 540 832), whereby the resulting granular detergent composition comprises the bleach activator homogeneously distributed therein.
It is further known in the art to prepare granules comprising water-soluble bleach activators by spray-C 7197 (R) drying. GB-A-963 135 and US Patent 4,681,695 describe granules of water-soluble bleach activators prepared by spray-drying an aqueous slurry comprising said water-soluble bleach activator and an inorganic (hydratable) salt, e.g. disodium dihydrogen pyrophosphate. Contrary to the granules prepared from water-insoluble bleach activators, the spray-dried granules of water-soluble bleach activators as disclosed in the process of the art contain relatively high proportions of diluent and/or stabilising salts and a relatively low level of the reactive peroxyacid bleach precursor material. This level is normally up to about 50% by weight and, for stability reasons, preferably lower. Nevertheless, the chemical and physical stabilities of such granules of the art are in many cases still far from ideal.
Normally, these spray-dried granules suffer from poor attrition resistance, resulting in breakdown to fines upon handling, whereby chemical stability is affected.
DescriPtion of the invention It has now been found that water-soluble bleach activators can be successfully formed into spray-dried granules with high bleach activator contents of satisfactory stability if the water-soluble bleach activator is spray-dried from a crutcher slurry mix comprising said bleach activator and a film-forming polymeric material. Preferably an acidic film-forming polymeric material is used.
; 30 The present invention therefore provides a stable bleach activator composition in the form of spray-dried granules of a water-soluble bleach activator, comprising in homogeneous distribution:
(it from 50% to about 98% by weight of a water-soluble ` peroxyacid bleach precursor material;
(ii) from 2% to about 50% by weight of a film-forming C 7197 (R) polymeric material; and (iii) from 0% to about 48% by weight of an inert organic or inorganic salt.
Preferred spray-dried granule compositions will comprise:
(i) from 60% to about 90% by weight of said water-soluble peroxyacid bleach precursor;
(ii) from 5% to about 30% by weight of said film-forming polymeric material; and (iii) from 5% to about 35% by weight of said inert organic or inorganic salt.
In another aspect the invention provides a process for preparing bleach activator granules by spray-drying an aqueous slurry comprising a water-soluble bleach activator, wherein said aqueous slurry comprises from about 30-50% by weight of water, from about 25-69% by weight of a water-soluble peroxyacid bleach precursor, from about 1-10.5% by weight of a film-forming polymeric material, and from 0 to about 44% by weight of an inert organic or inorganic salt.
:, The water-soluble bleach activators used in the present invention are those materials which are soluble in water to an extent of at least 1% by weight, preferably at least about 5% by weight, at a temperature of 25C and pH 7.
Preferred water-soluble bleach activators are peroxyacid bleach precursors having the general formula I:
: : O
R - C - L (I) wherein R is an optionally substituted alkyl group ~33~
C 7197 (R) containing 1-12 carbon atoms or an optionally substituted phenyl group containing 6-10 carbon atoms, and L is a leaving group containing an anionic moiety, the conjugate acid of the leaving group having a PKa in the range of from 6 to 13.
The alkyl group R can be either linear or branched and, in preferred embodiments, it is unsubstituted and contains either 1 or 7-9 carbon atoms. In another group of suitable bleach activators, the alkyl group R is substituted and has the general formula II:
R1 - C (II) wherein R1 is a straight or branched chain alkyl containing from 4 to 10, preferably 6 to 10, more preferably 6 to 8 carbon atoms, R2 is H, CH3, C2H5 or C3H7 and X is halogen (Cl or Br), -OCH3 or OC2H5.
Particularly preferred bleach activators are those in : which R has the general formula III:
(III) wherein X is H, a halogen (Cl, Br or F) or a straight or branched chain alkyl group containing from 1-4 carbon atoms, expecialiy wherein X is H.
I`
: L can be essentially any suitable leaving group containing a moiety which is anionic at pH 7. A leaving group is any group that is displaced from the bleach activator as a consequence of the nucleophilic attack on the bleach activator by the perhydroxide anion.
Generally, for a group to be a suitable leaving group it C 7197 (R) must exert an electron-attracting effect. Leaving groups that exhibit such behaviour are those in which their conjugate acid has a PKa in the range of from 6 to 13, preferably from 7 to 11 and most preferably from 8 to 11. Also, in order for the activator to have the desired level of solubility in wash water it is essential that the leaving group contain an anionic moiety. Non-limiting examples of suitable anionic moieties are -S03M, -COOM and -OS03M wherein M is a proton or a compatible cation.
Preferred bleach activators are those of the general formula I wherein L is selected from 15 (a) (C~2)XY
Z and (b) O
wherein Z is H, R3 or halogen, R3 is an alkyl group having from 1 to 4 carbon atoms, x is O or an integer of from 1 to 4 and Y is selected from S03M, OS03M and C02M
and wherein M is H, alkali metal, alkalina earth metal, ammonium or substituted ammonium.
The preferred leaving group L has the formula (a) in which Z is I, x is O and Y is sulphonate or carboxylate.
A highly preferred bleach activator is sodium p-35 benzoyloxy benzene sulphonate (SBOBS).
C 7197 (R) The film-forming polymeric material should preferably be non-oxidiæable. Such suitable film-forming materials are, for example, the non-oxidizable polymers, which can be in the acid form or in the form of their alkali metal salts. Acidic polymers are preferred.
Acidic polymers usable in this invention can be any non-cellulosic homo- or copolymeric mono- and polycarboxylic acids having an average molecular weight of from 500 to about 1,000,000, preferably from 2,000 to 250,000, more preferably from 10,000 to 50,000.
Suitable polymers include those derived from acrylic acid, methacrylic acid, maleic acid, citraconic acid, aconitic acid, fumaric acid, mesaconic acid, phenyl maleic acid, benzyl maleic acid, itaconic acid, methylene malonic acid, alpha-Cl-C4 alkyl acrylic acid, alpha-hydroxy acrylic acid and acetalcarboxylic acid monomers, or from the anhydrides of the above monomers where these exist. The polymers can be homopolymers of the above mono- or polycarboxylic monomers; or copolymers af two or more of the above mono- or polycarboxyl monomers; or copolymers of one or more of ; the above carboxyl monomers with an unsaturated polymerizable monomer other than the specified mono- and polycarboxyl monomers; or modified homo- or copolymers of the above classes having, for example, a non-oxidizable phosphinic acid or sulphinic acid group.
Preferred acidic, polymeric materials are the polyacrylic acids, phosphinate-modified polyacrylic acids, such as described in GB patents 1,~85,235 and l,595,688 and EP-A-0182411; copolymers of maleic acid (anhydride) and acrylic or ]methacrylic acid; and acidic copolymers containing hydrophobic groups, such as copolymers based on polymethacrylic acid and polyacrylic acid esters in which the ratio of free carboxyl groups ~3~
C 7197 (R) to ester groups is at least 1:1. Commercially available polyacrylic acid polymers are, for example, the products sold under the trade name "Versicol", supplied by Allied Colloids, e.g~ Versicol E7 and Versicol E9.
As explained hereinbefore, the aqueous slurry prior to spray drying to form the bleach activator granules may or may not contain an inert inorganic or organic salt. A
preferred inert salt is an inert inorganic salt.
Suitable inorganic salts include disodium dihydrogen pyrophosphate, sodium dihydrogen orthophosphate, sodium sulphate, sodium bisulphate, magnesium sulphate and mixtures thereof. A particularly preferred inert salt usable in this invention is sodium sulphate.
There are no particular requirements for the spray-drying process other than conventional. The slurry is normally heated to a temperature of from about 60C to about 90C, preferably from about 80C to 90C, and spray-dried in a counter current of air having an inlet temperature of from about 250c to about 350C, ; preferably from about 275C to about 325C, and an outlet temperature of from about 90C to 125~C, preferably from 95C to about 110C.
The pH of the slurry is not critical, which means that the aqueous slurry composition as defined comprising the preferably acidic film-forming polymeric material can be spray-dried at its natural phi The high active content spray-dried bleach activator granules of the invention show the combined characteristics of excellent stability when stored in a detergent or bleach composition, improved mechanical strength and attrition resistance upon handling, as well ; as good dispersibility and dissolution rate on addition to the wash and/or bleach solution.
33~
C 7197 (R) In addition, they generally have a bulk density which can be varied within the range of 300 to about 850 grams/litre, and a weight average particle size of from about 150 em to 2000 em, preferably from about 500 em to 1500 em, thereby matching the values of particulate detergent or cleaning compositions so as to be usable for direct incorporation therein without undue segregation. The adjustments of these values are not part of the invention, but are measures within the routine skill of the artisan.
The present invention also encompasses bleaching compositions, laundry detergent and laundry additive compositions comprising the bleach activator granules detailed herein. Bleaching compositions according to the invention suitably contain from 5% to 99 5%, preferably from 20% to 90% by weight of peroxide compound bleaching agent and from 0.5% to 95%, preferably from 10% to 80%
by weight of bleach activator composition. Laundry compositions according to the invention generally contain from 2% to 40%, preferably from 5% to 25% by weight of detersive surfactant selected from anionic, nonionic, cationic, ampholytic and zwitterionic surfactants and mixtures thereof and from 0.1% to 20%, preferably from 0.5% to 10% by weight of the water-soluble organic peroxyacid bleach precursor. In such laundry compositions the bleach activator granules generally comprise from 0.5% to 40%, preferably from 1 to 10% by weight of the laundry composition, and the base composition comprises from 25~ to 99.5%, preferably from 35% to 75% by weight of the laundry composition. In addition, the laundry compositions generally comprise one or more inorganic or organic detergency builders in a total level of from 15~ to 90%, preferably from 20% to 60% by weight of the laundry composition, and peroxide compound bleaching agent at a level of from 5% to 35%, ; preferably from 8~ to 20% by weight ox the laundry ::
C 7197 (R) composition.
A wide range of surfactants can be used in the laundry compositions of the invention. US-A-4,111,855 and US-A-3,995,669 contain detailed listing of typical detersivesurfactants.
Suitable synthetic anionic surfactants are water-soluble salts of C8-C22 alkyl benzene sulphonates, C8-C22 alkyl sulphates, C10-Cl8 alkyl polyethoxy ether sulphates, C8-C24 paraffin sulphanates, alpha-C12-C24 olefin sulphonates, alpha-sulphonated C6-C20 fatty acids and their esters, C10-Cl8 alkyl glyceryl ether sulphonates, fatty acid monoglyceride sulphates and sulphonates, especially those prepared prom coconut oil, C8-C12 alkyl phenol polyethoxy ether sulphates, 2-acyloxy Cg-C23 alkane-1-sulphonates, and beta-alkyloxy C8-C20 alkane sulphonates.
A particularly suitable class of anionic surfactants includes water-soluble salts, particularly the alkali metal, ammonium and alkanolammonium salts or organic sulphuric reaction products having in their molecular structure an alkyl or alkaryl group containing from 8 to 22, especially from 10 $o 20 carbon atoms and a sulphonic acid or sulphuric acid ester group. (Included in the term "alkyl" is the alkyl portion of acyl groups.) Examples of this group of synthetic detergents are the sodium and potassium alkyl sulphates, especially those : obtained by sulphating the higher alcohols (C8_18) carbon atoms produced by reducing the glycerides of : tallow or coconut oil and sodium and potassium alkyl benzene sulphonates, in which the alkyl group contains prom 9 to 15, especially 11 to 13, carbon atoms, in straight chain or branched chain configuration, e.g.
C 7197 (R) those of the type described in US-A-2,220,099 and US-A-
Technical field This invention relates to bleach activator granules, method of making such granules and use thereof in bleaching and/or detergent compositions. More particularly it relates to improved bleach activator particles prepared by spray-drying for use in or with a detergent and/or bleach composition.
Backqround and prior art It is well known that peroxide compounds, such as perborates, percarbonates, perphosphates and persilicates, are highly useful for chemical bleaching of stains found on both coloured and white fabrics, and are thus also useful as bleaching agents for incorporation in laundry detergent compositions. Said peroxide compounds are most effective at high wash temperatures, i.e. at or near the boil wash temperature, .
but are substantially ineffective at lower temperatures of e.g. below 60~C. Many substances are known in the art which are referred to as bleach activators rendering peroxide compound bleaches effective at bleach solution temperatures of below 60C, by forming an organic peroxyacid in situ. A bleach activator can thus generally be described as an organic peroxyacid bleach precursor which in the bleaching solution reacts with the inorganic or organic peroxide compound, thereby releasing the corresponding peroxyacid.
Many such bleach activators are known in the art, most ox which contain perhydrolysable N-acyl or O-acyl ; residues. Examples of these include both the water-insoluble compounds such as succinic, benzoic and phthalic anhydrides, N,N,N',N'-tetraacetyl-ethylene C 7197 (R) diamine (TAED) and tetraacetyl-glycoluril (TAGU), as well as the water-soluble compounds such as acetyl salicylic acid, glucose penta-acetate (GPA), and the various esters of phenols and substituted phenols, e.g.
sodium acetoxy benzene sulphonate (SABS), sodium benzoyloxy benzene sulphonate (SBOBS) and sodium nonanoyloxy benzene sulphonate (SNOBS).
Hydrolytic instability requires that these bleach activators be protected from the surrounding media, e.g.
when incorporated in detergent compositions, particularly from moisture and alkaline ingredients. On the other hand, any proper method ox protecting the bleach activator from chemical attack must still allow a relatively quick release or dissolution of the activator in the wash liquor so as to enable the beneficial reaction with the peroxide compound to occur without undue delay The most common way of protecting bleach activators is by methods wherein the powdered bleach activator material is presented in the form of agglomerated, granulated and/or coated particles Spray-drying is another route which has been proposed to convert bleach activators into a useful particulate product form.
It is known to prepare granules of water-insoluble bleach activators, e.g. TAED, TAGU, by spray-drying an aqueous slurry comprising said water-insoluble bleach activator (see US Patent 4,4S7,858). It is also known to incorporate water-insoluble bleach activators in a detergent slurry for spray-drying (see GB-A-l 540 832), whereby the resulting granular detergent composition comprises the bleach activator homogeneously distributed therein.
It is further known in the art to prepare granules comprising water-soluble bleach activators by spray-C 7197 (R) drying. GB-A-963 135 and US Patent 4,681,695 describe granules of water-soluble bleach activators prepared by spray-drying an aqueous slurry comprising said water-soluble bleach activator and an inorganic (hydratable) salt, e.g. disodium dihydrogen pyrophosphate. Contrary to the granules prepared from water-insoluble bleach activators, the spray-dried granules of water-soluble bleach activators as disclosed in the process of the art contain relatively high proportions of diluent and/or stabilising salts and a relatively low level of the reactive peroxyacid bleach precursor material. This level is normally up to about 50% by weight and, for stability reasons, preferably lower. Nevertheless, the chemical and physical stabilities of such granules of the art are in many cases still far from ideal.
Normally, these spray-dried granules suffer from poor attrition resistance, resulting in breakdown to fines upon handling, whereby chemical stability is affected.
DescriPtion of the invention It has now been found that water-soluble bleach activators can be successfully formed into spray-dried granules with high bleach activator contents of satisfactory stability if the water-soluble bleach activator is spray-dried from a crutcher slurry mix comprising said bleach activator and a film-forming polymeric material. Preferably an acidic film-forming polymeric material is used.
; 30 The present invention therefore provides a stable bleach activator composition in the form of spray-dried granules of a water-soluble bleach activator, comprising in homogeneous distribution:
(it from 50% to about 98% by weight of a water-soluble ` peroxyacid bleach precursor material;
(ii) from 2% to about 50% by weight of a film-forming C 7197 (R) polymeric material; and (iii) from 0% to about 48% by weight of an inert organic or inorganic salt.
Preferred spray-dried granule compositions will comprise:
(i) from 60% to about 90% by weight of said water-soluble peroxyacid bleach precursor;
(ii) from 5% to about 30% by weight of said film-forming polymeric material; and (iii) from 5% to about 35% by weight of said inert organic or inorganic salt.
In another aspect the invention provides a process for preparing bleach activator granules by spray-drying an aqueous slurry comprising a water-soluble bleach activator, wherein said aqueous slurry comprises from about 30-50% by weight of water, from about 25-69% by weight of a water-soluble peroxyacid bleach precursor, from about 1-10.5% by weight of a film-forming polymeric material, and from 0 to about 44% by weight of an inert organic or inorganic salt.
:, The water-soluble bleach activators used in the present invention are those materials which are soluble in water to an extent of at least 1% by weight, preferably at least about 5% by weight, at a temperature of 25C and pH 7.
Preferred water-soluble bleach activators are peroxyacid bleach precursors having the general formula I:
: : O
R - C - L (I) wherein R is an optionally substituted alkyl group ~33~
C 7197 (R) containing 1-12 carbon atoms or an optionally substituted phenyl group containing 6-10 carbon atoms, and L is a leaving group containing an anionic moiety, the conjugate acid of the leaving group having a PKa in the range of from 6 to 13.
The alkyl group R can be either linear or branched and, in preferred embodiments, it is unsubstituted and contains either 1 or 7-9 carbon atoms. In another group of suitable bleach activators, the alkyl group R is substituted and has the general formula II:
R1 - C (II) wherein R1 is a straight or branched chain alkyl containing from 4 to 10, preferably 6 to 10, more preferably 6 to 8 carbon atoms, R2 is H, CH3, C2H5 or C3H7 and X is halogen (Cl or Br), -OCH3 or OC2H5.
Particularly preferred bleach activators are those in : which R has the general formula III:
(III) wherein X is H, a halogen (Cl, Br or F) or a straight or branched chain alkyl group containing from 1-4 carbon atoms, expecialiy wherein X is H.
I`
: L can be essentially any suitable leaving group containing a moiety which is anionic at pH 7. A leaving group is any group that is displaced from the bleach activator as a consequence of the nucleophilic attack on the bleach activator by the perhydroxide anion.
Generally, for a group to be a suitable leaving group it C 7197 (R) must exert an electron-attracting effect. Leaving groups that exhibit such behaviour are those in which their conjugate acid has a PKa in the range of from 6 to 13, preferably from 7 to 11 and most preferably from 8 to 11. Also, in order for the activator to have the desired level of solubility in wash water it is essential that the leaving group contain an anionic moiety. Non-limiting examples of suitable anionic moieties are -S03M, -COOM and -OS03M wherein M is a proton or a compatible cation.
Preferred bleach activators are those of the general formula I wherein L is selected from 15 (a) (C~2)XY
Z and (b) O
wherein Z is H, R3 or halogen, R3 is an alkyl group having from 1 to 4 carbon atoms, x is O or an integer of from 1 to 4 and Y is selected from S03M, OS03M and C02M
and wherein M is H, alkali metal, alkalina earth metal, ammonium or substituted ammonium.
The preferred leaving group L has the formula (a) in which Z is I, x is O and Y is sulphonate or carboxylate.
A highly preferred bleach activator is sodium p-35 benzoyloxy benzene sulphonate (SBOBS).
C 7197 (R) The film-forming polymeric material should preferably be non-oxidiæable. Such suitable film-forming materials are, for example, the non-oxidizable polymers, which can be in the acid form or in the form of their alkali metal salts. Acidic polymers are preferred.
Acidic polymers usable in this invention can be any non-cellulosic homo- or copolymeric mono- and polycarboxylic acids having an average molecular weight of from 500 to about 1,000,000, preferably from 2,000 to 250,000, more preferably from 10,000 to 50,000.
Suitable polymers include those derived from acrylic acid, methacrylic acid, maleic acid, citraconic acid, aconitic acid, fumaric acid, mesaconic acid, phenyl maleic acid, benzyl maleic acid, itaconic acid, methylene malonic acid, alpha-Cl-C4 alkyl acrylic acid, alpha-hydroxy acrylic acid and acetalcarboxylic acid monomers, or from the anhydrides of the above monomers where these exist. The polymers can be homopolymers of the above mono- or polycarboxylic monomers; or copolymers af two or more of the above mono- or polycarboxyl monomers; or copolymers of one or more of ; the above carboxyl monomers with an unsaturated polymerizable monomer other than the specified mono- and polycarboxyl monomers; or modified homo- or copolymers of the above classes having, for example, a non-oxidizable phosphinic acid or sulphinic acid group.
Preferred acidic, polymeric materials are the polyacrylic acids, phosphinate-modified polyacrylic acids, such as described in GB patents 1,~85,235 and l,595,688 and EP-A-0182411; copolymers of maleic acid (anhydride) and acrylic or ]methacrylic acid; and acidic copolymers containing hydrophobic groups, such as copolymers based on polymethacrylic acid and polyacrylic acid esters in which the ratio of free carboxyl groups ~3~
C 7197 (R) to ester groups is at least 1:1. Commercially available polyacrylic acid polymers are, for example, the products sold under the trade name "Versicol", supplied by Allied Colloids, e.g~ Versicol E7 and Versicol E9.
As explained hereinbefore, the aqueous slurry prior to spray drying to form the bleach activator granules may or may not contain an inert inorganic or organic salt. A
preferred inert salt is an inert inorganic salt.
Suitable inorganic salts include disodium dihydrogen pyrophosphate, sodium dihydrogen orthophosphate, sodium sulphate, sodium bisulphate, magnesium sulphate and mixtures thereof. A particularly preferred inert salt usable in this invention is sodium sulphate.
There are no particular requirements for the spray-drying process other than conventional. The slurry is normally heated to a temperature of from about 60C to about 90C, preferably from about 80C to 90C, and spray-dried in a counter current of air having an inlet temperature of from about 250c to about 350C, ; preferably from about 275C to about 325C, and an outlet temperature of from about 90C to 125~C, preferably from 95C to about 110C.
The pH of the slurry is not critical, which means that the aqueous slurry composition as defined comprising the preferably acidic film-forming polymeric material can be spray-dried at its natural phi The high active content spray-dried bleach activator granules of the invention show the combined characteristics of excellent stability when stored in a detergent or bleach composition, improved mechanical strength and attrition resistance upon handling, as well ; as good dispersibility and dissolution rate on addition to the wash and/or bleach solution.
33~
C 7197 (R) In addition, they generally have a bulk density which can be varied within the range of 300 to about 850 grams/litre, and a weight average particle size of from about 150 em to 2000 em, preferably from about 500 em to 1500 em, thereby matching the values of particulate detergent or cleaning compositions so as to be usable for direct incorporation therein without undue segregation. The adjustments of these values are not part of the invention, but are measures within the routine skill of the artisan.
The present invention also encompasses bleaching compositions, laundry detergent and laundry additive compositions comprising the bleach activator granules detailed herein. Bleaching compositions according to the invention suitably contain from 5% to 99 5%, preferably from 20% to 90% by weight of peroxide compound bleaching agent and from 0.5% to 95%, preferably from 10% to 80%
by weight of bleach activator composition. Laundry compositions according to the invention generally contain from 2% to 40%, preferably from 5% to 25% by weight of detersive surfactant selected from anionic, nonionic, cationic, ampholytic and zwitterionic surfactants and mixtures thereof and from 0.1% to 20%, preferably from 0.5% to 10% by weight of the water-soluble organic peroxyacid bleach precursor. In such laundry compositions the bleach activator granules generally comprise from 0.5% to 40%, preferably from 1 to 10% by weight of the laundry composition, and the base composition comprises from 25~ to 99.5%, preferably from 35% to 75% by weight of the laundry composition. In addition, the laundry compositions generally comprise one or more inorganic or organic detergency builders in a total level of from 15~ to 90%, preferably from 20% to 60% by weight of the laundry composition, and peroxide compound bleaching agent at a level of from 5% to 35%, ; preferably from 8~ to 20% by weight ox the laundry ::
C 7197 (R) composition.
A wide range of surfactants can be used in the laundry compositions of the invention. US-A-4,111,855 and US-A-3,995,669 contain detailed listing of typical detersivesurfactants.
Suitable synthetic anionic surfactants are water-soluble salts of C8-C22 alkyl benzene sulphonates, C8-C22 alkyl sulphates, C10-Cl8 alkyl polyethoxy ether sulphates, C8-C24 paraffin sulphanates, alpha-C12-C24 olefin sulphonates, alpha-sulphonated C6-C20 fatty acids and their esters, C10-Cl8 alkyl glyceryl ether sulphonates, fatty acid monoglyceride sulphates and sulphonates, especially those prepared prom coconut oil, C8-C12 alkyl phenol polyethoxy ether sulphates, 2-acyloxy Cg-C23 alkane-1-sulphonates, and beta-alkyloxy C8-C20 alkane sulphonates.
A particularly suitable class of anionic surfactants includes water-soluble salts, particularly the alkali metal, ammonium and alkanolammonium salts or organic sulphuric reaction products having in their molecular structure an alkyl or alkaryl group containing from 8 to 22, especially from 10 $o 20 carbon atoms and a sulphonic acid or sulphuric acid ester group. (Included in the term "alkyl" is the alkyl portion of acyl groups.) Examples of this group of synthetic detergents are the sodium and potassium alkyl sulphates, especially those : obtained by sulphating the higher alcohols (C8_18) carbon atoms produced by reducing the glycerides of : tallow or coconut oil and sodium and potassium alkyl benzene sulphonates, in which the alkyl group contains prom 9 to 15, especially 11 to 13, carbon atoms, in straight chain or branched chain configuration, e.g.
C 7197 (R) those of the type described in US-A-2,220,099 and US-A-
2,477,383 and those prepared from alkylbenzenes obtained by alkylation with straight chain chloroparaffins (using aluminium trichloride catalysis) or straight chain olefins (using hydrogen fluoride catalysis Especially valuable are linear straight chain alkyl benzene sulphonates in which the average of the alkyl group is about 11.8 carbon atoms, abbreviated as cl1 8 L~S, and C12-C15 methyl branched alkyl sulphates.
The alkane chains of the foregoing non-soap anionic surfactants can be derived from natural sources such as coconut oil or tallow, or can be made synthetically as for example using the Ziegler or Oxo processes. Water solubility can be achieved by using alkali metal, ammonium or alkanolammonium cations; sodium is preferred.
Suitable fatty acid soaps herein can be selected from the ordinary alkali metal (sodium, potassium), ammonium, and alkylolammonium salts of higher fatty acids containing from 8 to 24, preferably from 10 to 22 and especially from 16 to 22 carbon atoms in the alkyl chain. Particularly useful are the sodium and potassium salts of the mixtures of fatty acids derived from tallow and hydrogenated fish oil.
Mixtures ox anionic surfactants are particularly suitable herein, especially mixtures of sulphonate and sulphate surfactants in a weight ratio of from 5:1 to 1:5, preferably from 5:1 to 1:1, more preferably from 5:1 to 1.5:1. Especially preferred is a mixture of an alkyl benzene sulphonate having from 9 to 15, especially 11 to 13 carbon atoms in the alkyl radical, the cation
The alkane chains of the foregoing non-soap anionic surfactants can be derived from natural sources such as coconut oil or tallow, or can be made synthetically as for example using the Ziegler or Oxo processes. Water solubility can be achieved by using alkali metal, ammonium or alkanolammonium cations; sodium is preferred.
Suitable fatty acid soaps herein can be selected from the ordinary alkali metal (sodium, potassium), ammonium, and alkylolammonium salts of higher fatty acids containing from 8 to 24, preferably from 10 to 22 and especially from 16 to 22 carbon atoms in the alkyl chain. Particularly useful are the sodium and potassium salts of the mixtures of fatty acids derived from tallow and hydrogenated fish oil.
Mixtures ox anionic surfactants are particularly suitable herein, especially mixtures of sulphonate and sulphate surfactants in a weight ratio of from 5:1 to 1:5, preferably from 5:1 to 1:1, more preferably from 5:1 to 1.5:1. Especially preferred is a mixture of an alkyl benzene sulphonate having from 9 to 15, especially 11 to 13 carbon atoms in the alkyl radical, the cation
3~ being an alkali metal, preferably sodium; and either an alkyl sulphate having from 10 to 20, preferably 12 to 18 carbon atoms in the alkyl radical or an ethoxy sulphate ~23~
C 7197 (R) having from 10 to 20~ preferably 10 to 16 carbon atoms in the alkyl radical and an average degree of ethoxylation of 1 to 6, having an alkali metal cation, preferably sodium.
The nonionic surfactants useful in the present invention are condensates of ethylene oxide with a hydrophobic moiety to provide a surfactant having an average hydrophilic-lipophilic balance (HLB) in the range from 8 to 17, preferably from 9.5 to 13.5, more preferably from 10 to 12.5.
Examples of suitable nonionic surfactants include the condensation products sf primary or secondary aliphatic alcohols having from 8 to 24 carbon atoms, in either straight chain or branched chain configuration, with from 2 to 40 moles, preferably 2 to moles of ethylene oxide per mole of alcohol. Preferably, the aliphatic alcohol comprises between 9 and 18 carbon atoms and is ~0 ethoxylated with between 2 and 9, desirably between 3 and 8 moles of ethylene oxide per mole of aliphatic alcohol. The preferred surfactants are prepared from primary alcohols which are either linear (such as those derived from natural fats or prepared by the Ziegler process from ethylene, e.g. myristyl, cetyl, stearyl alcohols), or partly branched such as the Lutensols (RTM), Dobanols (RTM) and Neodols (RTM) which have about 25% 2-methyl branching ( Lutensol (RTM) being a Trade Name of BASF, Dobanol (RTM~ and Neodol (RTM) being Trade Names of Shell), or Synperonics (RTM), which are understood to have about 50% 2-methyl branching (Synperonic (RTM) is a Trade Name of I.C.I.) or thy primary alcohols having more than 50% branched chain structure sold under the Trade Name Lial by Liquichimica. Specific examples of nonionic surfactants falling within the scope of the invention include Dobanol (RTM) 45-4, Dobanol (RTM) 45-7, Dobanol (RTM) i3 ;~ ~3~ J
C 7197 (R) 45-9, Dobanol (RTM) 91-2.5, Dobanol (RTM) 91-3, Dobanol (RTM) 91-4, Dobanol (RTM) 91-6, Dobanol (RTM) 91-8, Dobanol (RTM) 23-6.5, Synperonic (RTM) 6, Synperonic (RTM) 14, the condensation products of coconut alcohol alcohol with an average of between 5 and 12 moles of ethylene oxide per mole ox alcohol, the coconut alkyl portion having from 10 to 14 carbon atoms, and the condensation products of tallow alcohol with an average of between 7 and 12 moles of ethylene oxide per mole of alcohol, the tallow portion comprising essentially between 16 and 22 carbon atoms. Secondary linear alkyl ethoxylates are also suitable in the present compositions, especially those ethoxylates of the Tergitol series having from 9 to 15 carbon atoms in the alkyl group and up to 11, especially from 3 to 9, ethoxy residues per molecule.
Other suitable nonionic surfactants include the condensation products of C6-C12 alXyl phenols with from 3 to 30, preferably 5 to 14 moles ox ethylene oxide, an the compounds formed by condensing ethylene oxide with a hydrophobic base formed by the condensation of propylene oxide with propylene glycol, such synthetic nonionic detergents being available on the market under the Trade Name of "Pluronic (RTM)" supplied by Wyandotte Chemicals Corporation.
Especially preferred nonionic surfactants for use herein are the Cg-C15 primary alcohol ethoxylates containing 3-8 moles of ethylene oxide per mole of alcohol,particularly the C12-C15 primary alcohols containing 6-8 moles of ethylene oxide per mole of alcohol.
Cationic surfactants suitable for use herein include quaternary ammonium ~urfactants and surfactants of a semi-polar nature, for example amine oxides. Suitable quaternary ammonium surfactants are selected from mono ~5~3 C 7197 (R) Cg-C16, preferably C10-C14 N-alkyl or alkenyl ammonium surfactants wherein remaining N positions are substituted by methyl, hydroxyethyl or hydroxypropyl and the corresponding di-C6-C1o N-alkyl or alkenyl ammonium surfactants. Suitable amine oxides are selected from mono C8-C20, preferably C10-C14 N-alkyl or alkenyl amine oxides and propylene-1,3-diamine dioxides wherein the remaining N positions are again substituted by methyl, hydroxyethyl or hydroxypropyl.
Suitable detergent builder salts useful herein can be of the polyvalent inorganic and polyvalent organic types, or mixtures thereof. Non-limiting examples of suitable water-soluble, inorganic alkaline detergent builder salts include the alkali metal carbonates, borates, phosphates, pyrophosphates, tripolyphosphates and bicarbonates.
Organic builder/chelating agents that can be incorporated include citric acid, nitrilotriacetic and ethylenediamine tetraacetic acids and their salts, organic phosphonates derivatives such as those disclosed in US-A-3,213,030, US-A-3,433,021, US-A-3,29~,121 and US-A-2,599,807, and carboxylic acid builder salts such as those disclosed in US-A-3,308,067. Preferred chelating agents include nitrilotriacetic acid (TNA), nitrilo(trimethylene phosphonic acid) (NTMP), ethylenediamine tetra~methylene phosphonic acid) (EDTMP) and diethylenetriamine penta(methylene phosphonic acid) (DETPMP). Nixtures of organic and/or inorganic builders can be used herein. One such mixture of builders is disclosed in CA-A-755,038, e.g. a ternary mixture of sodium tripolyphosphate, trisodium nitrilotriacetate, and trisodi~m ethane-l-hydroxy-1,1-diphosphonate.
A further class of builder salts is the insoluble aluminosilicate type which functions by cation exchange ~3~
C 7197 (R) to remove polyvalent mineral hardness and heavy metal ions from solution. A preferred builder of this type has the formulation Naz(A102)z(SiO2)yOxH20 wherein z and y are inteyers of at least 6, the molar ratio of z to y is in the range from 1.0 to 0.5 and x is an integer from 15 to 264. Compositions incorporating builder salts of this type form the subject of GB-A-1,429,143, DE-A-2,433,485 and DE-A-2,525,778.
An alkali metal, or alkaline earth metal, silicate can also be present in granular compositions of the invention. The alkali metal silicate is preferably from 3% to 15%7 Suitable silicate solids have a molar ratio of SiO2/alkali metal2O in the range from 1.0 to 3.3, more preferably from 1.5 to 2Ø
The compositions herein will normally contain peroxide compounds as bleaching components. In general, the bleach is selected from inorganic peroxy salts, hydrogen peroxide, hydrogen peroxide adducts, and organic peroxyacids and salts thereof. Suitable inorganic peroxygen bleaches include sodium perborate mono- and tetrahydrate, sodium percarbonate, sodium persilicate, urea-hydrogen peroxide addition products and the clathrate 4Na2S04:2H202:1NaCl. Suitable organic bleaches include peroxylauric acid, peroxyoctanoic acid, peroxynonanoic acid, peroxydecanoic acid, diperoxydodecanedioic acid, diperoxyazelaic acid, mono-and diperoxyphthalic acid and mono- and dipèroxyisophthalic acid.
The compositions of the invention can be supplemented by ; all manner of detergent and laundering components, inclusive of suds suppressors, enzymes, fluorescers, soil-suspending agents, anti-caking agents, pigments, perfumes, fabric-conditioning agents etc.
'J~j ~J
C 7197 (R) Suds suppressors are represented by materials of the silicone, wax, vegetable and hydrocarbon oil and phosphate ester varieties. Suitable silicone suds-controlling agents include polydimethylsiloxanes having a molecular weight in the range from 200 to 200,000 and a kinematic viscosity in the range from 20 to 2,000,000 mm2/s, preferably from 3000 to 30,000 mm2/s, and mixtures of siloxanes and hydrophobic silanated (preferably trimethylsilanated) silica having a particle size in the range from about 10 nm to 20 nm and a specific surface area above 50 m2/g. Suitable waxes include microcrystalline waxes having a melting point in the range from 65C to lOO~C, a molecular weight in the range from 4000-1000, and a penetration value of at least 6, measured at 77C by ASTM-D1321, and also paraffin waxes, synthetic waxes and natural waxes.
Suitable phosphate esters include mono- and/or di-C16-C22 alkyl or alkenyl phosphate esters, and the corresponding mono- and/or di-alkyl or alkenyl ether phosphates containing up to 6 ethoxy groups per molecule.
Enzymes suitable for use herein include those discussed in US-A-3,519,570 and US-A-3,533,139. Suitable fluorescers include Blankophor (RTM) MBBH (Bayer A&) and Tinopal (RTM) CBS and EMS (Ciba-Geigy). Suitable fabric-conditioning agents include smectite-type clays as disclosed in GB-A-1,400,898 and di-C12-C24 alkyl or alkenyl amines and ammonium salts.
Antiredeposition and soil suspension agents suitable herein include cellulose derivatives such as methylcellulose, carboxymethylcellulose and hydroxyethylcellulose, and homo- or co-polymeric polycarboxylic acids or their salts in which the polycarboxylic acid comprises at least two carboxyl radicals separated prom each other by not more than two Jo C 7197 (R) carbon atoms. Polymers of this type are disclose in GB-A~1,596,765. Preferred polymers include copolymers or salts thereof of maleic anhydride with ethylene, methylvinyl ether, acrylic acid or methacrylic acid, the maleic anhydride constituting at least 20 mole percent of the copolymer. These polymers are valuable for improving whiteness maintenance, fabric ash deposition, and cleaning performance on clay, proteinaceous and - oxidizable soils in the presence of transition metal impurities.
Laundry additive products comprising bleaching or laundry detergent compositions in water-releasable combination with a non-particulate carrier as described in EP-A-96566 and EP-A-99197, are also suitable herein.
Laundry products comprising a laundry detergent composition and a bleaching composition comprising the bleach activator granules and peroxide bleach in separate packs or in two-compartment sachets are also suitable herein.
; Example I
A spray-dried granular bleach activator of the following composition:
% bv weiaht Sodium-p-benzoyloxybenzene sulphonate (SBOBS) 65 Polyacrylic acid (Versicol E9) * 5 30 Sodium sulphate 30 Trace water up to 100%
* M.W. 75,000 was prepared in the following manner:
.:
100 Kg of an aqueous slurry composition was prepared consisting of about 40% by weight of water, 39% by weight of SBOBS, 3% by weight of polyacrylic acid and . .
C 7197 (R) 18% sodium sulphate. This slurry was heated to a temperature of about 85OC and pumped to a 1.8 m diameter spray-drying tower through a nozzle of siæe 2 mm at a pressure of about 35 bar. Counter-current air of about 275-300C was let in at a velocity of 0.4 meter/sec, which left the tower at a temperature of about 100C.
The spray-dried bleach activator particles collected at the bottom of the spray-drying tower were non-dusty granules of regular, somewhat rounded shape of a size varying from about 300 to 1000 em, which upon cooling and storage showed no substantial sign of attrition and degradation, i.e. the product had good particle strength.
Upon addition to a wash solution with some stirring, a rapid dissolution rate was observed.
Example II
The following granular laundry detergent compositions were prepared by a combined spray-drying and dry-mixing process.
25 Composition (% by weiqht) A B C
: Spray-dried base Powder Sodium alkylbenzene sulphonate 6.0 6.5 9.0 Fatty alcohol-7 ethoxylate 3.0 3.0 1.5 Sodium soap 5.0 5.0 30 Sodium triphosphate 33.0 - -Sodium aluminosilicate (Zeolite A) - 40.0 24.0 Sodium carbonate - - 2.0 Maleic ac~d/acrylic acid copolymer (Sokalan CP5 ex BASF) - - 4.0 35 Alkaline silicate 6.0 8.0 Sodium sulphate 21.0 16.0 30.0 Sodium carboxymethyl rellulose O.5 0.5 0.5 C 7197 (R) EDTA 0.2 0.2 0.2 Fluorescer 0.3 0.3 0.2 Water and minor ingredients ' 6.0 9.5 8.6 Dry-mixinq inqredients Anti-foaming agent - - 2.5 Sodium perborate monohydrate 15.08.0 13.0 Spray-dried bleach activator granules of Example I (65% active)4.0 3.0 4.0 10 Proteolyt enzyme (Savinase~Jex Novo) - - O.5 The above products show excellent bleach activator stability upon storage and handling.
C 7197 (R) having from 10 to 20~ preferably 10 to 16 carbon atoms in the alkyl radical and an average degree of ethoxylation of 1 to 6, having an alkali metal cation, preferably sodium.
The nonionic surfactants useful in the present invention are condensates of ethylene oxide with a hydrophobic moiety to provide a surfactant having an average hydrophilic-lipophilic balance (HLB) in the range from 8 to 17, preferably from 9.5 to 13.5, more preferably from 10 to 12.5.
Examples of suitable nonionic surfactants include the condensation products sf primary or secondary aliphatic alcohols having from 8 to 24 carbon atoms, in either straight chain or branched chain configuration, with from 2 to 40 moles, preferably 2 to moles of ethylene oxide per mole of alcohol. Preferably, the aliphatic alcohol comprises between 9 and 18 carbon atoms and is ~0 ethoxylated with between 2 and 9, desirably between 3 and 8 moles of ethylene oxide per mole of aliphatic alcohol. The preferred surfactants are prepared from primary alcohols which are either linear (such as those derived from natural fats or prepared by the Ziegler process from ethylene, e.g. myristyl, cetyl, stearyl alcohols), or partly branched such as the Lutensols (RTM), Dobanols (RTM) and Neodols (RTM) which have about 25% 2-methyl branching ( Lutensol (RTM) being a Trade Name of BASF, Dobanol (RTM~ and Neodol (RTM) being Trade Names of Shell), or Synperonics (RTM), which are understood to have about 50% 2-methyl branching (Synperonic (RTM) is a Trade Name of I.C.I.) or thy primary alcohols having more than 50% branched chain structure sold under the Trade Name Lial by Liquichimica. Specific examples of nonionic surfactants falling within the scope of the invention include Dobanol (RTM) 45-4, Dobanol (RTM) 45-7, Dobanol (RTM) i3 ;~ ~3~ J
C 7197 (R) 45-9, Dobanol (RTM) 91-2.5, Dobanol (RTM) 91-3, Dobanol (RTM) 91-4, Dobanol (RTM) 91-6, Dobanol (RTM) 91-8, Dobanol (RTM) 23-6.5, Synperonic (RTM) 6, Synperonic (RTM) 14, the condensation products of coconut alcohol alcohol with an average of between 5 and 12 moles of ethylene oxide per mole ox alcohol, the coconut alkyl portion having from 10 to 14 carbon atoms, and the condensation products of tallow alcohol with an average of between 7 and 12 moles of ethylene oxide per mole of alcohol, the tallow portion comprising essentially between 16 and 22 carbon atoms. Secondary linear alkyl ethoxylates are also suitable in the present compositions, especially those ethoxylates of the Tergitol series having from 9 to 15 carbon atoms in the alkyl group and up to 11, especially from 3 to 9, ethoxy residues per molecule.
Other suitable nonionic surfactants include the condensation products of C6-C12 alXyl phenols with from 3 to 30, preferably 5 to 14 moles ox ethylene oxide, an the compounds formed by condensing ethylene oxide with a hydrophobic base formed by the condensation of propylene oxide with propylene glycol, such synthetic nonionic detergents being available on the market under the Trade Name of "Pluronic (RTM)" supplied by Wyandotte Chemicals Corporation.
Especially preferred nonionic surfactants for use herein are the Cg-C15 primary alcohol ethoxylates containing 3-8 moles of ethylene oxide per mole of alcohol,particularly the C12-C15 primary alcohols containing 6-8 moles of ethylene oxide per mole of alcohol.
Cationic surfactants suitable for use herein include quaternary ammonium ~urfactants and surfactants of a semi-polar nature, for example amine oxides. Suitable quaternary ammonium surfactants are selected from mono ~5~3 C 7197 (R) Cg-C16, preferably C10-C14 N-alkyl or alkenyl ammonium surfactants wherein remaining N positions are substituted by methyl, hydroxyethyl or hydroxypropyl and the corresponding di-C6-C1o N-alkyl or alkenyl ammonium surfactants. Suitable amine oxides are selected from mono C8-C20, preferably C10-C14 N-alkyl or alkenyl amine oxides and propylene-1,3-diamine dioxides wherein the remaining N positions are again substituted by methyl, hydroxyethyl or hydroxypropyl.
Suitable detergent builder salts useful herein can be of the polyvalent inorganic and polyvalent organic types, or mixtures thereof. Non-limiting examples of suitable water-soluble, inorganic alkaline detergent builder salts include the alkali metal carbonates, borates, phosphates, pyrophosphates, tripolyphosphates and bicarbonates.
Organic builder/chelating agents that can be incorporated include citric acid, nitrilotriacetic and ethylenediamine tetraacetic acids and their salts, organic phosphonates derivatives such as those disclosed in US-A-3,213,030, US-A-3,433,021, US-A-3,29~,121 and US-A-2,599,807, and carboxylic acid builder salts such as those disclosed in US-A-3,308,067. Preferred chelating agents include nitrilotriacetic acid (TNA), nitrilo(trimethylene phosphonic acid) (NTMP), ethylenediamine tetra~methylene phosphonic acid) (EDTMP) and diethylenetriamine penta(methylene phosphonic acid) (DETPMP). Nixtures of organic and/or inorganic builders can be used herein. One such mixture of builders is disclosed in CA-A-755,038, e.g. a ternary mixture of sodium tripolyphosphate, trisodium nitrilotriacetate, and trisodi~m ethane-l-hydroxy-1,1-diphosphonate.
A further class of builder salts is the insoluble aluminosilicate type which functions by cation exchange ~3~
C 7197 (R) to remove polyvalent mineral hardness and heavy metal ions from solution. A preferred builder of this type has the formulation Naz(A102)z(SiO2)yOxH20 wherein z and y are inteyers of at least 6, the molar ratio of z to y is in the range from 1.0 to 0.5 and x is an integer from 15 to 264. Compositions incorporating builder salts of this type form the subject of GB-A-1,429,143, DE-A-2,433,485 and DE-A-2,525,778.
An alkali metal, or alkaline earth metal, silicate can also be present in granular compositions of the invention. The alkali metal silicate is preferably from 3% to 15%7 Suitable silicate solids have a molar ratio of SiO2/alkali metal2O in the range from 1.0 to 3.3, more preferably from 1.5 to 2Ø
The compositions herein will normally contain peroxide compounds as bleaching components. In general, the bleach is selected from inorganic peroxy salts, hydrogen peroxide, hydrogen peroxide adducts, and organic peroxyacids and salts thereof. Suitable inorganic peroxygen bleaches include sodium perborate mono- and tetrahydrate, sodium percarbonate, sodium persilicate, urea-hydrogen peroxide addition products and the clathrate 4Na2S04:2H202:1NaCl. Suitable organic bleaches include peroxylauric acid, peroxyoctanoic acid, peroxynonanoic acid, peroxydecanoic acid, diperoxydodecanedioic acid, diperoxyazelaic acid, mono-and diperoxyphthalic acid and mono- and dipèroxyisophthalic acid.
The compositions of the invention can be supplemented by ; all manner of detergent and laundering components, inclusive of suds suppressors, enzymes, fluorescers, soil-suspending agents, anti-caking agents, pigments, perfumes, fabric-conditioning agents etc.
'J~j ~J
C 7197 (R) Suds suppressors are represented by materials of the silicone, wax, vegetable and hydrocarbon oil and phosphate ester varieties. Suitable silicone suds-controlling agents include polydimethylsiloxanes having a molecular weight in the range from 200 to 200,000 and a kinematic viscosity in the range from 20 to 2,000,000 mm2/s, preferably from 3000 to 30,000 mm2/s, and mixtures of siloxanes and hydrophobic silanated (preferably trimethylsilanated) silica having a particle size in the range from about 10 nm to 20 nm and a specific surface area above 50 m2/g. Suitable waxes include microcrystalline waxes having a melting point in the range from 65C to lOO~C, a molecular weight in the range from 4000-1000, and a penetration value of at least 6, measured at 77C by ASTM-D1321, and also paraffin waxes, synthetic waxes and natural waxes.
Suitable phosphate esters include mono- and/or di-C16-C22 alkyl or alkenyl phosphate esters, and the corresponding mono- and/or di-alkyl or alkenyl ether phosphates containing up to 6 ethoxy groups per molecule.
Enzymes suitable for use herein include those discussed in US-A-3,519,570 and US-A-3,533,139. Suitable fluorescers include Blankophor (RTM) MBBH (Bayer A&) and Tinopal (RTM) CBS and EMS (Ciba-Geigy). Suitable fabric-conditioning agents include smectite-type clays as disclosed in GB-A-1,400,898 and di-C12-C24 alkyl or alkenyl amines and ammonium salts.
Antiredeposition and soil suspension agents suitable herein include cellulose derivatives such as methylcellulose, carboxymethylcellulose and hydroxyethylcellulose, and homo- or co-polymeric polycarboxylic acids or their salts in which the polycarboxylic acid comprises at least two carboxyl radicals separated prom each other by not more than two Jo C 7197 (R) carbon atoms. Polymers of this type are disclose in GB-A~1,596,765. Preferred polymers include copolymers or salts thereof of maleic anhydride with ethylene, methylvinyl ether, acrylic acid or methacrylic acid, the maleic anhydride constituting at least 20 mole percent of the copolymer. These polymers are valuable for improving whiteness maintenance, fabric ash deposition, and cleaning performance on clay, proteinaceous and - oxidizable soils in the presence of transition metal impurities.
Laundry additive products comprising bleaching or laundry detergent compositions in water-releasable combination with a non-particulate carrier as described in EP-A-96566 and EP-A-99197, are also suitable herein.
Laundry products comprising a laundry detergent composition and a bleaching composition comprising the bleach activator granules and peroxide bleach in separate packs or in two-compartment sachets are also suitable herein.
; Example I
A spray-dried granular bleach activator of the following composition:
% bv weiaht Sodium-p-benzoyloxybenzene sulphonate (SBOBS) 65 Polyacrylic acid (Versicol E9) * 5 30 Sodium sulphate 30 Trace water up to 100%
* M.W. 75,000 was prepared in the following manner:
.:
100 Kg of an aqueous slurry composition was prepared consisting of about 40% by weight of water, 39% by weight of SBOBS, 3% by weight of polyacrylic acid and . .
C 7197 (R) 18% sodium sulphate. This slurry was heated to a temperature of about 85OC and pumped to a 1.8 m diameter spray-drying tower through a nozzle of siæe 2 mm at a pressure of about 35 bar. Counter-current air of about 275-300C was let in at a velocity of 0.4 meter/sec, which left the tower at a temperature of about 100C.
The spray-dried bleach activator particles collected at the bottom of the spray-drying tower were non-dusty granules of regular, somewhat rounded shape of a size varying from about 300 to 1000 em, which upon cooling and storage showed no substantial sign of attrition and degradation, i.e. the product had good particle strength.
Upon addition to a wash solution with some stirring, a rapid dissolution rate was observed.
Example II
The following granular laundry detergent compositions were prepared by a combined spray-drying and dry-mixing process.
25 Composition (% by weiqht) A B C
: Spray-dried base Powder Sodium alkylbenzene sulphonate 6.0 6.5 9.0 Fatty alcohol-7 ethoxylate 3.0 3.0 1.5 Sodium soap 5.0 5.0 30 Sodium triphosphate 33.0 - -Sodium aluminosilicate (Zeolite A) - 40.0 24.0 Sodium carbonate - - 2.0 Maleic ac~d/acrylic acid copolymer (Sokalan CP5 ex BASF) - - 4.0 35 Alkaline silicate 6.0 8.0 Sodium sulphate 21.0 16.0 30.0 Sodium carboxymethyl rellulose O.5 0.5 0.5 C 7197 (R) EDTA 0.2 0.2 0.2 Fluorescer 0.3 0.3 0.2 Water and minor ingredients ' 6.0 9.5 8.6 Dry-mixinq inqredients Anti-foaming agent - - 2.5 Sodium perborate monohydrate 15.08.0 13.0 Spray-dried bleach activator granules of Example I (65% active)4.0 3.0 4.0 10 Proteolyt enzyme (Savinase~Jex Novo) - - O.5 The above products show excellent bleach activator stability upon storage and handling.
Claims (14)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A bleach activator composition in the form of spray-dried granules comprising a water-soluble organic peroxyacid bleach precursor, characterized in that it comprises in homogeneous distribution :
(i) from 50% to about 98% by weight of a water-soluble peroxyacid bleach precursor;
(ii) from 2% to about 50% by weight of a film-forming polymeric material; and (iii) from 0% to about 48% by weight of an inert organic or inorganic salt.
(i) from 50% to about 98% by weight of a water-soluble peroxyacid bleach precursor;
(ii) from 2% to about 50% by weight of a film-forming polymeric material; and (iii) from 0% to about 48% by weight of an inert organic or inorganic salt.
2. A composition according to Claim 1, characterized in that it comprises ;
(i) from 60% to 90% by weight of said water-soluble peroxyacid bleach precursor;
(ii) from 5% to 30% by weight of said film-forming polymeric material; and (iii) from 5% to 35% by weight of said inert organic or inorganic salt.
(i) from 60% to 90% by weight of said water-soluble peroxyacid bleach precursor;
(ii) from 5% to 30% by weight of said film-forming polymeric material; and (iii) from 5% to 35% by weight of said inert organic or inorganic salt.
3. A composition according to Claim 1, characterized in that the water-soluble organic peroxyacid bleach precursor has the general formula:
wherein R is an optionally substituted alkyl group containing 1-12 carbon atoms or an optionally substituted phenyl group containing 6-10 carbon atoms, and L is a leaving group containing an anionic moiety, the conjugate acid of the leaving group having a pKa in the range of from 6 to 13.
wherein R is an optionally substituted alkyl group containing 1-12 carbon atoms or an optionally substituted phenyl group containing 6-10 carbon atoms, and L is a leaving group containing an anionic moiety, the conjugate acid of the leaving group having a pKa in the range of from 6 to 13.
4. A composition according to Claim 3, characterized in that R has the formula :
wherein X is H, a halogen (Cl, Br or F) or a straight or branched chain alkyl group containing from 1-4 carbon atoms.
wherein X is H, a halogen (Cl, Br or F) or a straight or branched chain alkyl group containing from 1-4 carbon atoms.
5. A composition according to Claim 4, characterized in that the water-soluble peroxyacid bleach precursor is sodium p-benzoyloxy benzene sulphonate.
6. A composition according to Claim 1, characterized in that the film-forming polymeric material is a non-oxidizable acidic polymer.
7. A composition according to Claim 6, characterized in that said polymer is a non-cellulosic homo- or co-polymer of mono- or poly-carboxylic acids, having an average molecular weight of from 500 to about 1,000,000.
8. A composition according to Claim 7, characterized in that said polymeric material is selected from the group consisting of polyacrylic acids, phosphinate-modified polyacrylic acids, copolymers of maleic acid (anhydride) and acrylic or methacrylic acid, and acidic copolymers based on polymethacrylic acid and polyacrylic acid esters.
9. A composition according to Claim 1, characterized in that the inert salt is sodium sulphate.
10. A process for preparing a granular bleach activator composition according to Claim 1, by spray-drying an aqueous slurry comprising a water-soluble bleach activator, characterized in that said aqueous slurry comprises from about 30-50% by weight of water, from about 25-69% by weight of water-soluble peroxyacid bleach precursor, from about 1-10.5% by weight of a film-forming polymeric material, and from 0 to about 44%
by weight of an inert organic or inorganic salt.
by weight of an inert organic or inorganic salt.
11. A bleaching composition comprising from 5% to 99.5% by weight of peroxide compound bleaching agent and from 0.5% to 95% by weight of a bleach activator composition according to Claim 1.
12. A laundry composition comprising 2-40% by weight of a detersive surfactant selected from anionic, nonionic, cationic, ampholytic and zwitterionic surfactants and mixtures thereof, from 15-90% by weight of a detergency builder, from 5-35% by weight of a peroxide compound bleaching agent and from 0.5-40% by weight of a bleach activator composition according to Claim 1.
13. A laundry composition according to Claim 12, characterized in that it comprises from 5-25% by weight of said surfactant, from 20-60% by weight of said detergency builder, from 8-20% by weight of said peroxide compound bleach and from 1-10% by weight of said bleach activator composition.
14. The bleach activator composition as claimed in claim 1 and substantially as described herein.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8919006.0 | 1989-08-21 | ||
GB898919006A GB8919006D0 (en) | 1989-08-21 | 1989-08-21 | Granulated bleach activator particles |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2023309A1 true CA2023309A1 (en) | 1991-02-22 |
Family
ID=10661909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002023309A Abandoned CA2023309A1 (en) | 1989-08-21 | 1990-08-15 | Granulated bleach activator particles |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0415472A3 (en) |
JP (1) | JPH0391599A (en) |
AU (1) | AU630999B2 (en) |
BR (1) | BR9004122A (en) |
CA (1) | CA2023309A1 (en) |
GB (1) | GB8919006D0 (en) |
NO (1) | NO903650L (en) |
ZA (1) | ZA906622B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5269962A (en) * | 1988-10-14 | 1993-12-14 | The Clorox Company | Oxidant composition containing stable bleach activator granules |
JPH07316591A (en) * | 1994-03-31 | 1995-12-05 | Lion Corp | Bleaching composition |
WO2001092209A2 (en) | 2000-06-02 | 2001-12-06 | Eastman Chemical Company | Process for hydrolyzing amido-carboxylic acid esters into amido-carboxylic acids |
US6498124B2 (en) | 2000-06-02 | 2002-12-24 | Eastman Chemical Company | Isolation of phenyl ester salts from mixtures comprising sulfolane |
US6500973B2 (en) | 2000-06-02 | 2002-12-31 | Eastman Chemical Company | Extractive solution crystallization of chemical compounds |
WO2001092216A2 (en) | 2000-06-02 | 2001-12-06 | Eastman Chemical Company | Improved purification of phenyl ester salts |
US6660712B2 (en) | 2000-06-02 | 2003-12-09 | Dale Elbert Van Sickle | Stabilization of amido acids with antioxidants |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE622138A (en) * | 1961-09-05 | |||
GB1595769A (en) * | 1976-02-06 | 1981-08-19 | Unilever Ltd | Spraydried detergent components |
EP0106634B1 (en) * | 1982-10-08 | 1986-06-18 | THE PROCTER & GAMBLE COMPANY | Bodies containing bleach activators |
GB8422158D0 (en) * | 1984-09-01 | 1984-10-03 | Procter & Gamble Ltd | Bleach compositions |
US4730921A (en) * | 1985-10-31 | 1988-03-15 | Genetic Systems, Inc. | Photodensitometer for minimizing the refractive effects of a fluid sample |
GB8607388D0 (en) * | 1986-03-25 | 1986-04-30 | Unilever Plc | Activator compositions |
GB8607387D0 (en) * | 1986-03-25 | 1986-04-30 | Unilever Plc | Activator compositions |
-
1989
- 1989-08-21 GB GB898919006A patent/GB8919006D0/en active Pending
-
1990
- 1990-08-08 EP EP19900202153 patent/EP0415472A3/en not_active Withdrawn
- 1990-08-15 CA CA002023309A patent/CA2023309A1/en not_active Abandoned
- 1990-08-17 AU AU61110/90A patent/AU630999B2/en not_active Ceased
- 1990-08-20 NO NO90903650A patent/NO903650L/en unknown
- 1990-08-21 BR BR909004122A patent/BR9004122A/en not_active Application Discontinuation
- 1990-08-21 ZA ZA906622A patent/ZA906622B/en unknown
- 1990-08-21 JP JP2219873A patent/JPH0391599A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
BR9004122A (en) | 1991-09-03 |
JPH0391599A (en) | 1991-04-17 |
NO903650L (en) | 1991-02-22 |
AU6111090A (en) | 1991-02-21 |
EP0415472A3 (en) | 1991-04-03 |
EP0415472A2 (en) | 1991-03-06 |
NO903650D0 (en) | 1990-08-20 |
ZA906622B (en) | 1992-04-29 |
GB8919006D0 (en) | 1989-10-04 |
AU630999B2 (en) | 1992-11-12 |
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