CA2256079A1 - Polymer - Google Patents
Polymer Download PDFInfo
- Publication number
- CA2256079A1 CA2256079A1 CA 2256079 CA2256079A CA2256079A1 CA 2256079 A1 CA2256079 A1 CA 2256079A1 CA 2256079 CA2256079 CA 2256079 CA 2256079 A CA2256079 A CA 2256079A CA 2256079 A1 CA2256079 A1 CA 2256079A1
- Authority
- CA
- Canada
- Prior art keywords
- polymer
- imprinted
- compounds
- malodor
- polymer according
- 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
- 229920000642 polymer Polymers 0.000 title claims abstract description 114
- 239000000126 substance Substances 0.000 claims abstract description 29
- 230000027455 binding Effects 0.000 claims abstract description 11
- 239000002537 cosmetic Substances 0.000 claims abstract description 11
- 239000004744 fabric Substances 0.000 claims abstract description 10
- 239000002781 deodorant agent Substances 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims description 34
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 27
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 26
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 24
- 150000001875 compounds Chemical class 0.000 claims description 24
- 239000000178 monomer Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000002904 solvent Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical class C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 14
- 239000003431 cross linking reagent Substances 0.000 claims description 14
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical class CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 11
- 229920000344 molecularly imprinted polymer Polymers 0.000 claims description 11
- 239000000796 flavoring agent Chemical class 0.000 claims description 9
- 210000004243 sweat Anatomy 0.000 claims description 9
- 235000019634 flavors Nutrition 0.000 claims description 8
- 238000006116 polymerization reaction Methods 0.000 claims description 8
- NTWSIWWJPQHFTO-AATRIKPKSA-N (2E)-3-methylhex-2-enoic acid Chemical compound CCC\C(C)=C\C(O)=O NTWSIWWJPQHFTO-AATRIKPKSA-N 0.000 claims description 7
- RSFQOQOSOMBPEJ-UHFFFAOYSA-N 3-Methyl-2-hexenoic acid Natural products CCC(C)=CC(O)=O RSFQOQOSOMBPEJ-UHFFFAOYSA-N 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- -1 phenylpropenyl Chemical class 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 4
- 125000001931 aliphatic group Chemical group 0.000 claims description 4
- 239000003599 detergent Substances 0.000 claims description 4
- 239000002979 fabric softener Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 3
- 150000001298 alcohols Chemical class 0.000 claims description 3
- 150000001299 aldehydes Chemical class 0.000 claims description 3
- 150000001735 carboxylic acids Chemical class 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 150000002576 ketones Chemical class 0.000 claims description 3
- 150000002596 lactones Chemical class 0.000 claims description 3
- 150000002989 phenols Chemical class 0.000 claims description 3
- 238000006068 polycondensation reaction Methods 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 2
- 238000007151 ring opening polymerisation reaction Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 150000003431 steroids Chemical class 0.000 claims description 2
- 150000001491 aromatic compounds Chemical class 0.000 claims 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical class COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- 230000008020 evaporation Effects 0.000 claims 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 claims 1
- 239000003960 organic solvent Substances 0.000 claims 1
- 239000000725 suspension Substances 0.000 claims 1
- 230000005923 long-lasting effect Effects 0.000 abstract description 3
- QMVPMAAFGQKVCJ-UHFFFAOYSA-N citronellol Chemical compound OCCC(C)CCC=C(C)C QMVPMAAFGQKVCJ-UHFFFAOYSA-N 0.000 description 48
- 239000000047 product Substances 0.000 description 33
- QMVPMAAFGQKVCJ-SNVBAGLBSA-N (R)-(+)-citronellol Natural products OCC[C@H](C)CCC=C(C)C QMVPMAAFGQKVCJ-SNVBAGLBSA-N 0.000 description 24
- WRMNZCZEMHIOCP-UHFFFAOYSA-N 2-phenylethanol Chemical compound OCCC1=CC=CC=C1 WRMNZCZEMHIOCP-UHFFFAOYSA-N 0.000 description 24
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 24
- JGQFVRIQXUFPAH-UHFFFAOYSA-N beta-citronellol Natural products OCCC(C)CCCC(C)=C JGQFVRIQXUFPAH-UHFFFAOYSA-N 0.000 description 24
- 235000000484 citronellol Nutrition 0.000 description 24
- 239000003205 fragrance Substances 0.000 description 23
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2,2'-azo-bis-isobutyronitrile Substances N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 17
- 239000002304 perfume Substances 0.000 description 16
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 11
- 239000003570 air Substances 0.000 description 11
- 238000002360 preparation method Methods 0.000 description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 10
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 description 7
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 7
- 238000001035 drying Methods 0.000 description 6
- 238000004817 gas chromatography Methods 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 5
- 229910052753 mercury Inorganic materials 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- RRAFCDWBNXTKKO-UHFFFAOYSA-N eugenol Chemical compound COC1=CC(CC=C)=CC=C1O RRAFCDWBNXTKKO-UHFFFAOYSA-N 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000006552 photochemical reaction Methods 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 229960004132 diethyl ether Drugs 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- 239000013643 reference control Substances 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 238000002470 solid-phase micro-extraction Methods 0.000 description 3
- 238000010561 standard procedure Methods 0.000 description 3
- SCCDQYPEOIRVGX-UHFFFAOYSA-N Acetyleugenol Chemical compound COC1=CC(CC=C)=CC=C1OC(C)=O SCCDQYPEOIRVGX-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- NPBVQXIMTZKSBA-UHFFFAOYSA-N Chavibetol Natural products COC1=CC=C(CC=C)C=C1O NPBVQXIMTZKSBA-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 229920000858 Cyclodextrin Polymers 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 239000005770 Eugenol Substances 0.000 description 2
- GLZPCOQZEFWAFX-UHFFFAOYSA-N Geraniol Chemical compound CC(C)=CCCC(C)=CCO GLZPCOQZEFWAFX-UHFFFAOYSA-N 0.000 description 2
- ZYEMGPIYFIJGTP-UHFFFAOYSA-N O-methyleugenol Chemical compound COC1=CC=C(CC=C)C=C1OC ZYEMGPIYFIJGTP-UHFFFAOYSA-N 0.000 description 2
- UVMRYBDEERADNV-UHFFFAOYSA-N Pseudoeugenol Natural products COC1=CC(C(C)=C)=CC=C1O UVMRYBDEERADNV-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 2
- 229940045714 alkyl sulfonate alkylating agent Drugs 0.000 description 2
- 150000008052 alkyl sulfonates Chemical class 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- QUKGYYKBILRGFE-UHFFFAOYSA-N benzyl acetate Chemical compound CC(=O)OCC1=CC=CC=C1 QUKGYYKBILRGFE-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- HVYWMOMLDIMFJA-DPAQBDIFSA-N cholesterol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 description 2
- 229940097362 cyclodextrins Drugs 0.000 description 2
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 2
- 229960002217 eugenol Drugs 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 2
- CDOSHBSSFJOMGT-UHFFFAOYSA-N linalool Chemical compound CC(C)=CCCC(C)(O)C=C CDOSHBSSFJOMGT-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 2
- DTGKSKDOIYIVQL-WEDXCCLWSA-N (+)-borneol Chemical group C1C[C@@]2(C)[C@@H](O)C[C@@H]1C2(C)C DTGKSKDOIYIVQL-WEDXCCLWSA-N 0.000 description 1
- 239000001490 (3R)-3,7-dimethylocta-1,6-dien-3-ol Substances 0.000 description 1
- CDOSHBSSFJOMGT-JTQLQIEISA-N (R)-linalool Natural products CC(C)=CCC[C@@](C)(O)C=C CDOSHBSSFJOMGT-JTQLQIEISA-N 0.000 description 1
- UFLHIIWVXFIJGU-ARJAWSKDSA-N (Z)-hex-3-en-1-ol Chemical compound CC\C=C/CCO UFLHIIWVXFIJGU-ARJAWSKDSA-N 0.000 description 1
- WEEGYLXZBRQIMU-UHFFFAOYSA-N 1,8-cineole Natural products C1CC2CCC1(C)OC2(C)C WEEGYLXZBRQIMU-UHFFFAOYSA-N 0.000 description 1
- WNJSKZBEWNVKGU-UHFFFAOYSA-N 2,2-dimethoxyethylbenzene Chemical compound COC(OC)CC1=CC=CC=C1 WNJSKZBEWNVKGU-UHFFFAOYSA-N 0.000 description 1
- DNRJTBAOUJJKDY-UHFFFAOYSA-N 2-Acetyl-3,5,5,6,8,8-hexamethyl-5,6,7,8- tetrahydronaphthalene Chemical compound CC(=O)C1=C(C)C=C2C(C)(C)C(C)CC(C)(C)C2=C1 DNRJTBAOUJJKDY-UHFFFAOYSA-N 0.000 description 1
- XUDBVJCTLZTSDC-UHFFFAOYSA-N 2-ethenylbenzoic acid Chemical class OC(=O)C1=CC=CC=C1C=C XUDBVJCTLZTSDC-UHFFFAOYSA-N 0.000 description 1
- AKOVMBAFZSPEQU-UHFFFAOYSA-N 2-methylhex-2-enoic acid Chemical compound CCCC=C(C)C(O)=O AKOVMBAFZSPEQU-UHFFFAOYSA-N 0.000 description 1
- YXRXDZOBKUTUQZ-UHFFFAOYSA-N 3,4-dimethyloct-3-en-2-one Chemical compound CCCCC(C)=C(C)C(C)=O YXRXDZOBKUTUQZ-UHFFFAOYSA-N 0.000 description 1
- OALYTRUKMRCXNH-UHFFFAOYSA-N 5-pentyloxolan-2-one Chemical compound CCCCCC1CCC(=O)O1 OALYTRUKMRCXNH-UHFFFAOYSA-N 0.000 description 1
- HFVMLYAGWXSTQI-QYXZOKGRSA-N 5alpha-androst-16-en-3-one Chemical compound C1C(=O)CC[C@]2(C)[C@H]3CC[C@](C)(C=CC4)[C@@H]4[C@@H]3CC[C@H]21 HFVMLYAGWXSTQI-QYXZOKGRSA-N 0.000 description 1
- WEEGYLXZBRQIMU-WAAGHKOSSA-N Eucalyptol Chemical compound C1C[C@H]2CC[C@]1(C)OC2(C)C WEEGYLXZBRQIMU-WAAGHKOSSA-N 0.000 description 1
- 239000005792 Geraniol Substances 0.000 description 1
- GLZPCOQZEFWAFX-YFHOEESVSA-N Geraniol Natural products CC(C)=CCC\C(C)=C/CO GLZPCOQZEFWAFX-YFHOEESVSA-N 0.000 description 1
- 208000008454 Hyperhidrosis Diseases 0.000 description 1
- 229930183419 Irisone Natural products 0.000 description 1
- 241000234269 Liliales Species 0.000 description 1
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001253 acrylic acids Chemical class 0.000 description 1
- UZFLPKAIBPNNCA-BQYQJAHWSA-N alpha-ionone Chemical compound CC(=O)\C=C\C1C(C)=CCCC1(C)C UZFLPKAIBPNNCA-BQYQJAHWSA-N 0.000 description 1
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 229940072049 amyl acetate Drugs 0.000 description 1
- PGMYKACGEOXYJE-UHFFFAOYSA-N anhydrous amyl acetate Natural products CCCCCOC(C)=O PGMYKACGEOXYJE-UHFFFAOYSA-N 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 229940007550 benzyl acetate Drugs 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 235000012000 cholesterol Nutrition 0.000 description 1
- 238000013375 chromatographic separation Methods 0.000 description 1
- 229960005233 cineole Drugs 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 150000008049 diazo compounds Chemical group 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940093476 ethylene glycol Drugs 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 229940113087 geraniol Drugs 0.000 description 1
- MNWFXJYAOYHMED-UHFFFAOYSA-M heptanoate Chemical compound CCCCCCC([O-])=O MNWFXJYAOYHMED-UHFFFAOYSA-M 0.000 description 1
- UFLHIIWVXFIJGU-UHFFFAOYSA-N hex-3-en-1-ol Natural products CCC=CCCO UFLHIIWVXFIJGU-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000004680 hydrogen peroxides Chemical class 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000003018 immunoassay Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- SDQFDHOLCGWZPU-UHFFFAOYSA-N lilial Chemical compound O=CC(C)CC1=CC=C(C(C)(C)C)C=C1 SDQFDHOLCGWZPU-UHFFFAOYSA-N 0.000 description 1
- 229930007744 linalool Natural products 0.000 description 1
- 239000000401 methanolic extract Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229940116837 methyleugenol Drugs 0.000 description 1
- PRHTXAOWJQTLBO-UHFFFAOYSA-N methyleugenol Natural products COC1=CC=C(C(C)=C)C=C1OC PRHTXAOWJQTLBO-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011356 non-aqueous organic solvent Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229940067107 phenylethyl alcohol Drugs 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 229930194459 prunolide Natural products 0.000 description 1
- 150000003216 pyrazines Chemical class 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- XWGJFPHUCFXLBL-UHFFFAOYSA-M rongalite Chemical compound [Na+].OCS([O-])=O XWGJFPHUCFXLBL-UHFFFAOYSA-M 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 1
- 229940001584 sodium metabisulfite Drugs 0.000 description 1
- 235000010262 sodium metabisulphite Nutrition 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000009870 specific binding Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 208000013460 sweaty Diseases 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229940116411 terpineol Drugs 0.000 description 1
- FACAUSJJVBMWLV-JXMROGBWSA-N thiogeraniol Chemical class CC(C)=CCC\C(C)=C\CS FACAUSJJVBMWLV-JXMROGBWSA-N 0.000 description 1
- RGVQNSFGUOIKFF-UHFFFAOYSA-N verdyl acetate Chemical compound C12CC=CC2C2CC(OC(=O)C)C1C2 RGVQNSFGUOIKFF-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- YEIGUXGHHKAURB-UHFFFAOYSA-N viridine Natural products O=C1C2=C3CCC(=O)C3=CC=C2C2(C)C(O)C(OC)C(=O)C3=COC1=C23 YEIGUXGHHKAURB-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Abstract
The invention relates to a polymer presenting binding sites for at least one organoleptic substance, and specifically, which binding sites are at least partly molecularly imprinted with an organoleptic substance. The polymer which has the property to bind specific classes of organoleptic molecules can beused in any application where a long lasting effect of the organoleptic substance is targeted, e.g. in cosmetic products, deodorants, air refreshing products, laundry products and in fibers for fabrics. If the polymer prior has been imprinted with malodor molecules this polymer is used to reduce malodor.
Description
CA 022~6079 1998-12-14 Ref. 20'032 The invention relates to a polymer presenting binding sites for at least one organoleptic substance, and specifically, which binding sites are at least partly molecularly imprinted with at least one organoleptic substance, which, for example, allows the slow release of odoriferous compounds. In particular, 5 the invention relates to the production and use of these new types of polymersto trap and retain fragrance compositions, especially molecules of one specific fragrance or malodor substances or a specific malodor compound. These polymers which have the property to bind specific classes of organoleptic molecules can be used in any application where a long lasting effect of the 0 organoleptic substance is targeted, e.g. in cosmetic products, deodorants, airrefreshing products, laundry products such as detergents and fabric softeners, and in fibers for fabrics. For example, if a polymer has been imprinted with malodor molecules this polymer is used to reduce prior malodor, e.g. malodor in deodorant, cosmetic, air refreshing or laundry product applications.
A general strategy currently employed in imparting odours to consumer products is ~t~mixing of the fragrance directly to the product. The major drawback of this procedure is that most of the fragrance is lost during manufacturing, storage and use because the fragrance molecules are too volatile and/or too unstable. Often the fragrance is also lost because of lack of 20 adhesion to the support to be perfumed, e.g. on skin, hair or fabric.
In some cases, the fragrances are microencapsulated or treated with cyclodextrins to form inclusion complexes which decrease the volatility and improve the stability. However, these methods gave often not satisfactory results or are too expensive. For example, as described in US Patent 5,382,567 25 a major drawback of the heretofore used cyclodextrins is their high water solubility as soon as they are used in aqueous applications.
Most materials used so far as solid phase adsorbants for above mentioned purposes act in a relatively non specific manner. Recently molecularly imprinted polymers (singular or plural form is hereafter abbreviated MIP) 30 have received much attention to prepare receptor mimics or a kind of plastic antibodies able to recognize and bind various highly-functionalized or high molecular weight molecules, see K. Mosbach et al., The Emerging Technique of Molecular Imprinting and its Future Impact on Biotechnology, Mey/So 10.9.98 Bio/Technology, February, 162-169, 1996 and M.T. Muldon et al., Plastic antibodies: molecular imprinted polymers, Chemistry & Industry, 18 March, 204-205, 1996. Thus, fragrance compounds because of their low molecular weights and their relatively low or absent functionalization seem to be 5 unsuitable as print molecules for MIP and up to now have not been produced.
According to Mosbach et al. until now the described MIP have been applied in the following fields: chromatographic separations of pharmaceutical substances, artificial antibodies in immunoassays, use as enzyme mimics, catalysis and artificial enzymes, biosensor-like devices for structure specific 0 detections.
According to M.T. Muldon et al. in a first step of generating a MIP the molecule to be imprinted is covalently bound to polymerizable entities or the molecule is allowed to form noncovalent interactions with polymerizable entities. These molecular assemblies are subsequently polymerized using a 15 cross-linking agent, see Mosbach et al.. Hydrolytical extraction, or solvent extraction in case of noncovalent interactions, of the imprinted molecule furnishes rigid, insoluble, macroporous polymers which contain specific recognition and binding sites for the print molecule.
The advantages of molecularly imprinted polymers compared with 20 biological polymers like proteins or antibodies are their easy preparation and their stability under harsh conditions, i.e. especially pH, high temperature, chemical stability and presence of solvents.
But there are several drawbacks with the MIP described up to now.
Firstly the MIP known presently are suitable only for highly functionalized 25 and non-volatile molecules and, hence, were thought not to be suitable for flavors and/or fragrances because these are too volatile, non-polar and often only poorly functionalized. According to the state of the art less than 2 mmol of imprinting product / 100 mmol of cross-linking agent are used for the preparation of the MIP.
But, secondly, the actual m~ximum capacity is less than 1 mg of bound target product per 1 g MIP. This capacity is too low for the use as a specific carrier for organoleptic applications, especially for applications in slow release of odoriferous molecules.
It has now surprisingly been found that, in contrast to the usual t.hinking of a person skilled in the art, also volatile molecules, especially flavor CA 022~6079 1998-12-14 molecules or fragrance molecules (having at most low polarity), can be molecularly imprinted into polymers. Further an unexpected specific binding capacity could be achieved by imprinting the polymers with those molecules in higher amounts, e.g. up to 2 mmol of the odoriferous product / mmol of cross-5 linking agent could surprisingly be bound.
Hence, the present invention provides polymers which show specificaffinities towards odiferous products and which adsorb and slowly release these molecules when used as perfuming agents in applications where long lasting effects are wished, e.g. in cosmetic products, deodorants, air lo refresheners, laundry products such as detergents and fabric softeners, or in fibers for fabrics.
If these polymers are e.g. imprinted with malodor molecules they can also be specifically designed to adsorb malodors for deodorization of the ambient air or to adsorb sweat malodor in deodorant applications or to absorb malodor 15 in waste water. Examples of malodor products from sweat are steroids, e.g.
androstenone (see Eigen et al., J. of the Soc. of Cosmetic Chemists, 173-185, 1991), aliphatic acids, e.g. 3-methyl-2-hexenoic acid (see Preti et al., Journal of Chemical Ecology, Vol. 17, (7), 1469-1492, 1991) and sulphur cont,~ining products (see WO 91/11988).
For the formation of the MIP according to the invention the functional monomers are polymerized with cross-linking agents in the presence of the odoriferous product(s) to be imprinted and a radical generator as catalyst, which odoriferous product(s) may be a fragrance composition, a specific fragrance, a malodor product or a specific malodor compound.
Typical functional monomers are one of acrylic acids and methacrylic acid (hereafter named as (meth)acrylic acid), vinylbenzoic acids, phenylvinyl derivatives (e.g. styrene), phenylpropenyl derivatives (e.g. eugenol, methyleugenol, eugenyl acetate) or any molecule presenting a methylene or a vinyl group, i.e. any molecule RR'C=CH2 where R is an aliphatic or aromatic group and R' is an aliphatic group, aromatic group or H.
Methacrylic acid and styrene are the preferred monomers.
. , ~ ..
CA 022~6079 1998-12-14 One or more other monomers may be copolymerized with the above functional monomers. According to the invention the comonomers are specifically selected in such a way, that the rigidity of the copolymerized polymer matrix becomes improved compared with the unimproved polymer 5 matrix. Typical comonomers of this art encompass methyl (meth)acrylate, isobornyl (meth)acrylate, vinyl acetate, vinyl halogenide).
Other functional monomers may also be used, either alone or in admixtures with the above mentioned monomers and comonomers. Functional monomers comprise for example hydroxyalkyl (meth)acrylate, (meth)acryl 0 alkyl sulfonic acid and metal (meth)acryl alkyl sulfonates and salts of quartenarized ammonium alkyl (meth)acrylates.
Typical cross-linking agents exhibit at least two double bonds belonging to the methylene or vinyl groups. Ethylene glycol dimethacrylate, divinyl benzene or mixtures thereof being preferred. The molar ratio of cross-linking 15 agent / functional monomer is between 1 and 10, preferably between 2 and 5.
For the preparation of the MIP the functional monomer or a mixture of some different functionalized monomers are covalently linked to or form noncovalent interactions with the imprinting products. This can be performed either in the presence of a solvent or without a solvent.
Preferred are the non-covalent interactions so that after polymerization the imprinting product(s) is/are easily removed without hydrolytic treatment in the following process step.
For example, imprinting fragrance or flavor molecules are derived from any substance or mixture of substances used in perfumery or flavor because of their olfactive properties and which present some affinities with the functionalmonomers, e.g. by hydrogen bonds, lipophylic or electrostatic interactions.
They belong to various functional classes like alcohols, phenols, carboxylic acids, esters, carbonates, lactones, saturated and unsaturated ketones and aldehydes, aromatic coumpounds, nitrogen cont~ining products, sulphur cont~ining products, etc., which are known to a person skilled in the art. Some examples of fragrance or flavor products are citronellol, geraniol, phenylethyl alcohol, fixolide, cis-3-hexenol, eugenol, v~nillin, substituted pyrazines and thiogeraniol.
It is quite claer, that it is not possible to give a complete list of the odoriferous products or mixture of products which can be used for imprinting in the polymers. Neither is it possible to present a complete list of malodors.
But some malodors have already been mentioned above which can be used for the preparation of a MIP according to the invention.
The molar ratio of cross-linking agent / odoriferous imprinting product to 5 is preferably between 0.5 and 50, especially between 10 and 25.
For the preparation of the polymer any inert non-aqueous organic solvent which has a good solubility for the monomers (functional monomer and the cross-linking agent) can be used, e.g. toluene, hexane or chloroform, preferablytoluene. In some cases the polymerization without any solvent can be lo advantageous (see e.g. Example 4 as described hereafter).
The polymerization is performed with the help of standard methods known to the skilled person. Standard methods are described in the chemical literature, e.g. in M.J. Whitecombe et al., A new method for the introduction ofrecognition site functionally into polymers prepared by molecular imprinting:
16 Synthesis and Characterization of polymeric receptors for cholesterol, J. Am.Chem. Soc., 117, 7105-7111, 1995. In a simple case the following standard method of free radical polymerization in solution is used: a mixture of functional monomer(s), fragrance(s), cross-linking agent(s) and solvent(s) are treated at a temperature between -10~ and 70~C, preferably between 0 and 20 5~C, with a radical generator, e.g. oc,c~ -azobisisobutyronitrile (AIBN), di-tert-butyl peroxide or W light or both. In the presence of AIBN alone a reaction temperature of 50-70~C, preferably 65~C, is needed.
The imprinted polymer can also be prepared in the presence of the molecules to be imprinted by other polymerization methods such as e.g.
25 polyaddition, ring opening polymerization or polycondensation. Typical monomers for polycondensation are tetra-alkylsilanes and tetra-alkoxysilanes.
A preferred catalyst (initiator) as a radical generator is selected from the group consisting of diazo compounds like AIBN, peroxides like hydrogen peroxides, di-tert-butylperoxide and tert-butyl hydroperoxide. Reducing agents 30 can advantageously be used in combination with the above mentioned peroxide. Preferred reducing agents are sodium metabisulfite and sodium formaldehyde sulfoxylate.
If required the polymer may be functionalized in order to improve its affinity of the appropriate substrates. Typical functionalized monomers 35 comprise one of the following compounds: hydroxyalkyl (meth)acrylate, CA 022~6079 1998-12-14 (meth)acryl alkyl sulfonic acid, metal (meth)acryl alkyl sulfonates and salts ofquaternarized ammonium alkyl (meth)acrylates.
The molecularly imprinted polymers presenting (free) binding sites according to the invention are obtained by at least partly removal of the 5 imprinting product(s) by washing with a solvent. Any solvent for the imprinting product(s) and unreacted monomer(s) may be used. Preferably the solvent is one of the group consisting of ethanol, methanol, acetic acid, or a mixture thereof, optionally with addition of water. These polymers are specifically used for binding malodor(s).
lo The present invention provides imprinted polymers which surprisingly are able to adsorb larger amounts of fragrant and/or flavor chemicals or perfume compositions, hereafter generally called "fragrance", which have been used for imprinting. For example, they can be loaded with about 1% to about 10% by weight of "fragrance" /polymer, preferably with about 5%. The 15 resulting loaded polymers possess slow realease properties which make them more substantive in washing processes when used in a detergent, soap or fabric softener as when applied directly to those products. For example, when the imprinted polymer loaded with "fragrance" is used in a softener, the fragrance stays on the fabric for a much longer period as compared with a 20 simil~r non-imprinted polymer.
A great advantage of the imprinted polymers according to the invention is that they can be loaded with high amounts of "fragrance". By analysis and olfactive evaluation, the "fragrance" was shown, to be released much slower from imprinted polymers in a solid state as from a .simil~r non-imprinted 25 polymer and that the odor is retained over a longer period of time. This aspect is crucial for any application where a slow release is important, e.g. in air freshners, cosmetics, perfuming of fabric fibers. The imprinted polymers themselves may constitute the fibers.
To a certain extent it has been found that the imprinted polymers show 30 specificity for the imprinting molecule, e.g. phenylethanol imprinted polymer have no affinity for citronellol.
It has further been found shown that the polymer can be imprinted with a standard fragrance composition to have affinity for most of the components of the fragrance or structurally related products.
CA 022~6079 1998-12-14 The invention also provides polymers imprinted with malodor products e.g. sweat components, smoke, tobacco smoke, to bind specifically the malodor and not the perfumes present in the application. Interesting applications of polymers which have been imprinted with sweat malodors are in the field of 5 deodorants, air-freshners, cosmetic products. For example, it has been found that if a polymer which has been imprinted with 3-methyl-2-hexenoic acid, an important human sweat component, cf. G. Preti et al., Journal of Chemical Ecology, Vol. 17 (7) 1991, specifically adsorbs this sweat component out of a mixture cont~ining a standard perfume.
lo The present invention is further illustrated by the following examples which are not intented to limit the effective scope of the invention.
mples 1 Stvrene/ethylene glYcol dimethacrylate polymer imprinted with diphenYloxide for use in a softener Preparation of the molecularly imprinted polymer A mixture of a,o~',-azo-isobutyronitrile (AIBN, 164.0 mg, 1.0 mmol), ethyleneglycol dimethacrylate (19.82 g, 100 mmol), styrene (4.17 g,40 mmol) and diphenyloxide 1.2 g, 7.1 mmol) in toluene (40 ml) was magnetically stirred under argon while cooling on an ice bath (4~C) until complete dissolution of 20 the AIBN. The resulting solution was transferred into a photochemical reaction vessel as a thin layer of about 5 mm thickness, cooled on an ice both and placed under an UV source (high pressure mercury lamp, 150 watts) during 17 hours. The resulting polymer was ground to small particles in a mechanical mixer. The powder was thoroughly washed with a solution of 25 ethanol (480 ml) in deionized water (720 ml), ethanol (500 ml) and methanol(500 ml). After drying overnight under vacuum at 45~C, 14.2 g of purified, diphenyloxide free, imprinted polymer were recovered. As a control polymer exactly the same procedure was applied without diphenyloxide.
Preparation of the softeners The imprinted and the control polymers were both loaded with 5% w/w of diphenyloxide in 25 ml of diethyl ether and after homogenisation the solvent was completely evaporated.
CA 022~6079 1998-12-14 The resulting loaded polymers (4.8 g, cont~ining 0.233 g of diphenyloxid) were mixed each with a regular softener base (23.3 g, e.g. mixture Arquad 2HT from Akzo Chemie, Genapol T-150 and water in a ratio 5/1/100) and homogenized.
For the reference experiment 0.233 g diphenyloxide (1%/ softener base) was directly added to the same softener base.
Treatment of cotton towels with a softener The above prepared softeners were diluted with 3 liter of cold water and used for a softener treatment of newly washed cotton towels at room lo temperature during about 5 minutes by simulating a treatment in a washing m~chine. After treatment the towels have been centrifuged in a washing m~-~hine at 700 rotations/minute.
The towels have been evaluated olfactively by a panel of 10 persons and by head-space measurements in the humid state and after a 6 h and a 24 h 15 drying phase, respectively, at room temperature. The olfactive evaluation is summerized in Table 1 Table 1 Reference Control polymer Imprinted polymer humid state ++++ +++ +++
dry state after 6 h + ++ +++
drystate after 24h + + ++
++++ very strong +++ strong ++ moderate + weak Head-space measurements The head-space (4-10 ml for the humid and 1000 ml for the dry towels) were absorbed on an adsorbant (Tenax), extracted with hexane and the diphenyloxide content quantified by gas chromatography (GC) analysis (30 m x 0.32 mm CP-wax 52-CB column, 60~ C, 60-235~ C, 10~/min.). The results are listed in Table 2.
CA 022~6079 1998-12-14 Table 2 Concentration of diphenyloxide in the head-space (~g / 1 air) reference control polymer imprinted polymer humid state 108.8 4.62 0.193 dry state after 6 h0.193 0.634 0.845 dry state after 24 h0.193 0.456 0.566 ~ qmrle 2 Styrene/ethvlene ~lycol dimethacrylate polymer imprinted with a 5 standard fra~rance composition for use in a softener According the procedure described in Example 1 a polymer was imprinted with 1.2 g of a standard perfume composition cont~ining equivalent amounts of 15 volatile components as described in Table 5. The resulting polymer and corresponding control polymer have been used for the treatment of cotton o towels with a softener base according to Example 1 cont~ining a perfume loaded control polymer, a perfume loaded imprinted polymer and just the perfume as reference, respectively.
The towels have been evaluated olfactively by a panel of 10 persons and by head-space measurements as described in Example 1. The results are 15 summerized in Tables 3 to 5.
, CA 022~6079 1998-12-14 Table 3 Olfactive evaluation reference controlpolymer imprinted polymer humid state ++++ +++ +++
dry state after 6 h + ++ +++
dry state after 24 h + + ++
++++ very strong +++ strong ++ moderate + weak Table 4 5Head-space measurements Concentration of the perfume (total of the 15 components) in the head-space (ng / l air) reference control polymer imprinted polymer humid state 79693 47764 59483 dry state after 6 h 98.8 1819 2336 CA 022~6079 1998-12-14 Table 5 Concentration of the perfume components in the head-space after 6 h perfumereference control imprintedexcess imprinted component polymer polymer/control polymer (ng/l air) (ng/l air) (ngtl air) (%) amyl acetate 4.7 853 840 - 1.5 dimethyloctenon 2.2 356 604 +70 e eucalyptol 0.1 163 229 +41 cyclal 5.1 169 251 +49 linalool 0.1 42.3 74.3 +76 ald. C12MNA 15.2 30.8 43.8 +42 viridine 0.5 40.1 64.8 +62 terpineol 4.3 16.7 26.9 +61 benzyl acetate 3.1 58.8 86.6 +47 irisone 4.5 10.1 11.1 +10 verdyl acetate 2.2 18.4 27.2 +48 phenylethanol 1.4 10.5 14.0 +33 diphenyloxide 41.5 39.8 52.2 +31 prunolide 2 6.7 7.0 +5 lilial 12 3.9 4.0 +3 CA 022~6079 1998-12-14 mple 3 Methacrylic acid/ ethYlene ~1YCO1 dimethacrylate polymer imprinted with 3-methYl-2-hexenoic acid (sweat component) for deodorants Preparation of the molecularly imprinted polymer A mixture of a,oc'-azo-isobutyronitrile (AIBN, 82.1 mg, 0.5 mmol), ethyleneglycol dimethacrylate (9.91 g, 50 mmol), methacrylic acid (1.72 g, 20 mmol) and the sweat component 3-methyl-2-hexenoic acid (256.3 mg, 2 mmol) in toluene (20 ml) was magnetically stirred under argon while cooling in an ice bath until complete dissolution of the AIBN. The resulting solution was lo transfered into a photochemical reaction vessel as a thin layer of about 5 mmthickness, cooled on ice (4~ C) and placed under an W source (high pressure mercury lamp, 150 watts) during 17 hours. The resulting polymer was ground to small particles in a mechanical mixer. The polymeric powder was thoroughly washed resp. with a mixture of ethanol (240 ml), acetic acid (120 15 ml) and deionized water (240 ml), a mixture of ethanol (200 ml) and acetic acid (50ml) and finally with pure methanol (250 ml). After drying overnight under vacuum at 45~C, 8.21 g of purified, with 3-methyl-2-hexenoic acid imprinted polymer were recovered. As a control exactly the same procedure was applied without the methyl hexenoic acid.
The imprinted and the control polymers (100 mg) were each loaded with 1 ml of a diethyl-ether solution of 3-methyl-2-hexenoic acid (1 g/l), 1 ml of a diethylether solution of the standard perfume as described in Example 2, (1 g/l) and 50 lll of water. After homogenisation the ether is evaporated by gentleheating at about 40 ~C during 10 min. After 3 hours resting at room temperature in air the samples were olfactively evaluated:
In a panel of 9 persons 8 persons found that the imprinted sample has a much more pleasant, cleaner, less sweaty odour compared to the non-imprinted control.
CA 022~6079 1998-12-14 ~:x~mple 4 Methacrvlic acid/ ethylene glycol dimethacr~rlate polYmer imprinted with citronellol for use in air freshners. cosmetic products or fabric fibers 5 Preparation of the molecularly imprinted polymer without solvent A mixture of a,a'-azo-isobutyronitrile (AIBN, 65.7 mg, 0.4 mmol), ethyleneglycol dimethacrylate (9.91 g, 50 mmol), methacrylic acid (861.0 mg, 10 mmol) and citronellol (12.9 g, 83mmol) was magnetically stirred under argon while cooling in an ice bath until complete dissolution of the AIBN. The lo resulting solution was transfered into a photochemical reaction vessel as a thin layer of about 5 mm thickness, cooled on ice (4~ C) and placed under an W source (high pressure mercury lamp, 150 watts) during 16 hours. The resulting polymer was ground to small particles in a mechanical mixer. The polymeric powder was thoroughly washed with a mixture of ethanol (240 ml), 15 acetic acid (120 ml) and deionized water (240 ml), a mixture of ethanol (200 ml) and acetic acid (50ml) and finally with pure methanol (250 ml). After drying overnight under vacuum at 45~C, 8.21 g of purified, with citronellol imprinted polymer were recovered.
For a reference polymer imprinted with less citronellol the same 20 procedure was applied with additional 15 ml of toluene and only 195.9 mg (1.25 mmol of citronellol).
As a control exactly the same procedure was applied without citronellol and with 15 ml of toluene.
50 mg of each of the three polymers were suspended during 18 h in 5 ml 25 of a 70% methanol solution cont~ining 0.025 mg citronelloVml. After centrifugation the amount of adsorbed citronellol was evaluated by GC
analysis. The amounts of citronellol (%/polymer) adsorbed on the control polymer and on the imprinted polymers prepared with an without solvent are as presented in Table 6.
CA 022~6079 1998-12-14 Table 6 Control Reference polymer with citronellol as (no citronellol) (citronellol and solvent solvent) 059% 0.95~o 1.32%
The adsorption capacity for citronellol increases with the amount of citronellol used for imprinting.
mple 5 5 Methacrylic acid/ ethYlene ~lycol dimethacrvlate polvmer imprinted with citronellol for use in airfresners. cosmetic products or fabric fibers Preparation of the molecularly imprinted polymer in the presence of toluene lo A mixture of a,a'-azo-isobutyronitrile (AIBN, 82.1 mg, 0.5 mmol), ethyleneglycol dimethacrylate (9.91 g, 50 mmol), methacrylic acid (1.72 g, 20 mmol) and citronellol (2.476 g, 15.8 mmol) in toluene (10 ml) was magnetically stirred under argon while cooling in an ice bath until complete dissolution of the AIBN. The resulting solution was transferred into a photochemical 15 reaction vessel as a thin layer of about 5 mm thickness, cooled on ice (4~ C) and placed under an W source (high pressure mercury lamp, 150 watts) during 18 hours. The resulting polymer was ground to small particles in a mechanical mixer. The polymeric powder was thoroughly washed with a mixture of ethanol (240 ml), acetic acid (120 ml) and deionized water (240 ml), 20 a mixture of ethanol (200 ml) and acetic acid (50ml) and finally with pure methanol (250 ml). After drying overnight under vacuum at 45~C, 8.3 g of purified, with citronellol imprinted polymer were recovered. As a reference exactly the same procedure was applied without the citronellol.
Evaluation by adsorption in the solid phase 25 The imprinted polymer and the reference polymer were loaded with citronellol (50 mg/g as described in Example 1) and compared by GC analysis of methanol extracts and olfactive evaluation over a period of 14 days. The results are shown in Table 7.
CA 022~6079 1998-12-14 Table 7 ( mg/100 mg polymer) day 0 day 1 day 3 day 7 day 14 imprinted 3.5 3.3 4.0 3.8 3.6 polymer reference 3.9 3.0 3.2 3.2 3.3 polymer A panel of 11 persons found llnAnimously that the imprinted material relative to olfactive properties was significantly stronger after 18 days.
mple 6 5 Mixed styrene/methacrylic acid/ ethylene ~1YCO1 dimethacrylate polvmer imprinted with 2-phenylethanol for use in air freshners or fabric fibers Preparation of the molecularly imprinted polymer A mixture of a,a'-azo-isobutyronitrile (AIBN, 82.1 mg, 0.5 mmol), 0 ethyleneglycol dimethacrylate (9.91 g, 50 mmol), methacrylic acid (861.0 mg, 10 mmol), styrene (1.04 g, 10 mmol) and 2-phenylethanol (244.3 mg, 2 mmol) in toluene (20 ml) was magnetically stirred under argon while cooling in an ice bath until complete dissolution of the AIBN. The resulting solution was transfered into a photochemical reaction vessel as a thin layer of about 5 mm 15 thickness, cooled on ice (4~ C) and placed under an UV source (high pressure mercury lamp, 150 watts) during 17 hours. The resulting polymer was ground to small particles in a mechanical mixer. The polymeric powder was thoroughly washed resp. with a mixture of ethanol (240 ml), acetic acid (120 ml) and deionized water (240 ml), a mixture of ethanol (200 ml) and acetic 20 acid (50ml) and finally with pure methanol (250 ml). After drying over- night under vaccuum at 45~C, 6.45 g of purified, with phenylethanol imprinted polymer were recovered. As a reference exactly the same procedure was applied without phenylethanol.
CA 022~6079 1998-12-14 Evaluation by absorption in the solid phase Imprinted polymer and reference polymer samples were loaded with 50 mg/g phenylethanol, 50 mg/g citronellol and with the standard perfume composition (50 mg/g, 15 components, see Example 2) and evaluated after 14 5 days at room temperature by GC (Solid Phase Micro Extraction (SPME), Supelco). The results are summerized in Table 8.
Table 8 GC/SPME head-space evaluation of loaded polymers imprinted with phenylethanol Sample area counts imprinted loaded with phenylethanol96410 control loaded with phenylethanol 47577 imprinted loaded with citronellol 45262 control loaded with citronellol 47262 imprinted loaded with perfume* 11644 reference loaded with perfume * 9252 0 *perfume as described in Example 2 The results show that the phenylethanol imprinted polymer show high specificity for phenylethanol, specificity for the perfume and no specificity for citronellol.
A general strategy currently employed in imparting odours to consumer products is ~t~mixing of the fragrance directly to the product. The major drawback of this procedure is that most of the fragrance is lost during manufacturing, storage and use because the fragrance molecules are too volatile and/or too unstable. Often the fragrance is also lost because of lack of 20 adhesion to the support to be perfumed, e.g. on skin, hair or fabric.
In some cases, the fragrances are microencapsulated or treated with cyclodextrins to form inclusion complexes which decrease the volatility and improve the stability. However, these methods gave often not satisfactory results or are too expensive. For example, as described in US Patent 5,382,567 25 a major drawback of the heretofore used cyclodextrins is their high water solubility as soon as they are used in aqueous applications.
Most materials used so far as solid phase adsorbants for above mentioned purposes act in a relatively non specific manner. Recently molecularly imprinted polymers (singular or plural form is hereafter abbreviated MIP) 30 have received much attention to prepare receptor mimics or a kind of plastic antibodies able to recognize and bind various highly-functionalized or high molecular weight molecules, see K. Mosbach et al., The Emerging Technique of Molecular Imprinting and its Future Impact on Biotechnology, Mey/So 10.9.98 Bio/Technology, February, 162-169, 1996 and M.T. Muldon et al., Plastic antibodies: molecular imprinted polymers, Chemistry & Industry, 18 March, 204-205, 1996. Thus, fragrance compounds because of their low molecular weights and their relatively low or absent functionalization seem to be 5 unsuitable as print molecules for MIP and up to now have not been produced.
According to Mosbach et al. until now the described MIP have been applied in the following fields: chromatographic separations of pharmaceutical substances, artificial antibodies in immunoassays, use as enzyme mimics, catalysis and artificial enzymes, biosensor-like devices for structure specific 0 detections.
According to M.T. Muldon et al. in a first step of generating a MIP the molecule to be imprinted is covalently bound to polymerizable entities or the molecule is allowed to form noncovalent interactions with polymerizable entities. These molecular assemblies are subsequently polymerized using a 15 cross-linking agent, see Mosbach et al.. Hydrolytical extraction, or solvent extraction in case of noncovalent interactions, of the imprinted molecule furnishes rigid, insoluble, macroporous polymers which contain specific recognition and binding sites for the print molecule.
The advantages of molecularly imprinted polymers compared with 20 biological polymers like proteins or antibodies are their easy preparation and their stability under harsh conditions, i.e. especially pH, high temperature, chemical stability and presence of solvents.
But there are several drawbacks with the MIP described up to now.
Firstly the MIP known presently are suitable only for highly functionalized 25 and non-volatile molecules and, hence, were thought not to be suitable for flavors and/or fragrances because these are too volatile, non-polar and often only poorly functionalized. According to the state of the art less than 2 mmol of imprinting product / 100 mmol of cross-linking agent are used for the preparation of the MIP.
But, secondly, the actual m~ximum capacity is less than 1 mg of bound target product per 1 g MIP. This capacity is too low for the use as a specific carrier for organoleptic applications, especially for applications in slow release of odoriferous molecules.
It has now surprisingly been found that, in contrast to the usual t.hinking of a person skilled in the art, also volatile molecules, especially flavor CA 022~6079 1998-12-14 molecules or fragrance molecules (having at most low polarity), can be molecularly imprinted into polymers. Further an unexpected specific binding capacity could be achieved by imprinting the polymers with those molecules in higher amounts, e.g. up to 2 mmol of the odoriferous product / mmol of cross-5 linking agent could surprisingly be bound.
Hence, the present invention provides polymers which show specificaffinities towards odiferous products and which adsorb and slowly release these molecules when used as perfuming agents in applications where long lasting effects are wished, e.g. in cosmetic products, deodorants, air lo refresheners, laundry products such as detergents and fabric softeners, or in fibers for fabrics.
If these polymers are e.g. imprinted with malodor molecules they can also be specifically designed to adsorb malodors for deodorization of the ambient air or to adsorb sweat malodor in deodorant applications or to absorb malodor 15 in waste water. Examples of malodor products from sweat are steroids, e.g.
androstenone (see Eigen et al., J. of the Soc. of Cosmetic Chemists, 173-185, 1991), aliphatic acids, e.g. 3-methyl-2-hexenoic acid (see Preti et al., Journal of Chemical Ecology, Vol. 17, (7), 1469-1492, 1991) and sulphur cont,~ining products (see WO 91/11988).
For the formation of the MIP according to the invention the functional monomers are polymerized with cross-linking agents in the presence of the odoriferous product(s) to be imprinted and a radical generator as catalyst, which odoriferous product(s) may be a fragrance composition, a specific fragrance, a malodor product or a specific malodor compound.
Typical functional monomers are one of acrylic acids and methacrylic acid (hereafter named as (meth)acrylic acid), vinylbenzoic acids, phenylvinyl derivatives (e.g. styrene), phenylpropenyl derivatives (e.g. eugenol, methyleugenol, eugenyl acetate) or any molecule presenting a methylene or a vinyl group, i.e. any molecule RR'C=CH2 where R is an aliphatic or aromatic group and R' is an aliphatic group, aromatic group or H.
Methacrylic acid and styrene are the preferred monomers.
. , ~ ..
CA 022~6079 1998-12-14 One or more other monomers may be copolymerized with the above functional monomers. According to the invention the comonomers are specifically selected in such a way, that the rigidity of the copolymerized polymer matrix becomes improved compared with the unimproved polymer 5 matrix. Typical comonomers of this art encompass methyl (meth)acrylate, isobornyl (meth)acrylate, vinyl acetate, vinyl halogenide).
Other functional monomers may also be used, either alone or in admixtures with the above mentioned monomers and comonomers. Functional monomers comprise for example hydroxyalkyl (meth)acrylate, (meth)acryl 0 alkyl sulfonic acid and metal (meth)acryl alkyl sulfonates and salts of quartenarized ammonium alkyl (meth)acrylates.
Typical cross-linking agents exhibit at least two double bonds belonging to the methylene or vinyl groups. Ethylene glycol dimethacrylate, divinyl benzene or mixtures thereof being preferred. The molar ratio of cross-linking 15 agent / functional monomer is between 1 and 10, preferably between 2 and 5.
For the preparation of the MIP the functional monomer or a mixture of some different functionalized monomers are covalently linked to or form noncovalent interactions with the imprinting products. This can be performed either in the presence of a solvent or without a solvent.
Preferred are the non-covalent interactions so that after polymerization the imprinting product(s) is/are easily removed without hydrolytic treatment in the following process step.
For example, imprinting fragrance or flavor molecules are derived from any substance or mixture of substances used in perfumery or flavor because of their olfactive properties and which present some affinities with the functionalmonomers, e.g. by hydrogen bonds, lipophylic or electrostatic interactions.
They belong to various functional classes like alcohols, phenols, carboxylic acids, esters, carbonates, lactones, saturated and unsaturated ketones and aldehydes, aromatic coumpounds, nitrogen cont~ining products, sulphur cont~ining products, etc., which are known to a person skilled in the art. Some examples of fragrance or flavor products are citronellol, geraniol, phenylethyl alcohol, fixolide, cis-3-hexenol, eugenol, v~nillin, substituted pyrazines and thiogeraniol.
It is quite claer, that it is not possible to give a complete list of the odoriferous products or mixture of products which can be used for imprinting in the polymers. Neither is it possible to present a complete list of malodors.
But some malodors have already been mentioned above which can be used for the preparation of a MIP according to the invention.
The molar ratio of cross-linking agent / odoriferous imprinting product to 5 is preferably between 0.5 and 50, especially between 10 and 25.
For the preparation of the polymer any inert non-aqueous organic solvent which has a good solubility for the monomers (functional monomer and the cross-linking agent) can be used, e.g. toluene, hexane or chloroform, preferablytoluene. In some cases the polymerization without any solvent can be lo advantageous (see e.g. Example 4 as described hereafter).
The polymerization is performed with the help of standard methods known to the skilled person. Standard methods are described in the chemical literature, e.g. in M.J. Whitecombe et al., A new method for the introduction ofrecognition site functionally into polymers prepared by molecular imprinting:
16 Synthesis and Characterization of polymeric receptors for cholesterol, J. Am.Chem. Soc., 117, 7105-7111, 1995. In a simple case the following standard method of free radical polymerization in solution is used: a mixture of functional monomer(s), fragrance(s), cross-linking agent(s) and solvent(s) are treated at a temperature between -10~ and 70~C, preferably between 0 and 20 5~C, with a radical generator, e.g. oc,c~ -azobisisobutyronitrile (AIBN), di-tert-butyl peroxide or W light or both. In the presence of AIBN alone a reaction temperature of 50-70~C, preferably 65~C, is needed.
The imprinted polymer can also be prepared in the presence of the molecules to be imprinted by other polymerization methods such as e.g.
25 polyaddition, ring opening polymerization or polycondensation. Typical monomers for polycondensation are tetra-alkylsilanes and tetra-alkoxysilanes.
A preferred catalyst (initiator) as a radical generator is selected from the group consisting of diazo compounds like AIBN, peroxides like hydrogen peroxides, di-tert-butylperoxide and tert-butyl hydroperoxide. Reducing agents 30 can advantageously be used in combination with the above mentioned peroxide. Preferred reducing agents are sodium metabisulfite and sodium formaldehyde sulfoxylate.
If required the polymer may be functionalized in order to improve its affinity of the appropriate substrates. Typical functionalized monomers 35 comprise one of the following compounds: hydroxyalkyl (meth)acrylate, CA 022~6079 1998-12-14 (meth)acryl alkyl sulfonic acid, metal (meth)acryl alkyl sulfonates and salts ofquaternarized ammonium alkyl (meth)acrylates.
The molecularly imprinted polymers presenting (free) binding sites according to the invention are obtained by at least partly removal of the 5 imprinting product(s) by washing with a solvent. Any solvent for the imprinting product(s) and unreacted monomer(s) may be used. Preferably the solvent is one of the group consisting of ethanol, methanol, acetic acid, or a mixture thereof, optionally with addition of water. These polymers are specifically used for binding malodor(s).
lo The present invention provides imprinted polymers which surprisingly are able to adsorb larger amounts of fragrant and/or flavor chemicals or perfume compositions, hereafter generally called "fragrance", which have been used for imprinting. For example, they can be loaded with about 1% to about 10% by weight of "fragrance" /polymer, preferably with about 5%. The 15 resulting loaded polymers possess slow realease properties which make them more substantive in washing processes when used in a detergent, soap or fabric softener as when applied directly to those products. For example, when the imprinted polymer loaded with "fragrance" is used in a softener, the fragrance stays on the fabric for a much longer period as compared with a 20 simil~r non-imprinted polymer.
A great advantage of the imprinted polymers according to the invention is that they can be loaded with high amounts of "fragrance". By analysis and olfactive evaluation, the "fragrance" was shown, to be released much slower from imprinted polymers in a solid state as from a .simil~r non-imprinted 25 polymer and that the odor is retained over a longer period of time. This aspect is crucial for any application where a slow release is important, e.g. in air freshners, cosmetics, perfuming of fabric fibers. The imprinted polymers themselves may constitute the fibers.
To a certain extent it has been found that the imprinted polymers show 30 specificity for the imprinting molecule, e.g. phenylethanol imprinted polymer have no affinity for citronellol.
It has further been found shown that the polymer can be imprinted with a standard fragrance composition to have affinity for most of the components of the fragrance or structurally related products.
CA 022~6079 1998-12-14 The invention also provides polymers imprinted with malodor products e.g. sweat components, smoke, tobacco smoke, to bind specifically the malodor and not the perfumes present in the application. Interesting applications of polymers which have been imprinted with sweat malodors are in the field of 5 deodorants, air-freshners, cosmetic products. For example, it has been found that if a polymer which has been imprinted with 3-methyl-2-hexenoic acid, an important human sweat component, cf. G. Preti et al., Journal of Chemical Ecology, Vol. 17 (7) 1991, specifically adsorbs this sweat component out of a mixture cont~ining a standard perfume.
lo The present invention is further illustrated by the following examples which are not intented to limit the effective scope of the invention.
mples 1 Stvrene/ethylene glYcol dimethacrylate polymer imprinted with diphenYloxide for use in a softener Preparation of the molecularly imprinted polymer A mixture of a,o~',-azo-isobutyronitrile (AIBN, 164.0 mg, 1.0 mmol), ethyleneglycol dimethacrylate (19.82 g, 100 mmol), styrene (4.17 g,40 mmol) and diphenyloxide 1.2 g, 7.1 mmol) in toluene (40 ml) was magnetically stirred under argon while cooling on an ice bath (4~C) until complete dissolution of 20 the AIBN. The resulting solution was transferred into a photochemical reaction vessel as a thin layer of about 5 mm thickness, cooled on an ice both and placed under an UV source (high pressure mercury lamp, 150 watts) during 17 hours. The resulting polymer was ground to small particles in a mechanical mixer. The powder was thoroughly washed with a solution of 25 ethanol (480 ml) in deionized water (720 ml), ethanol (500 ml) and methanol(500 ml). After drying overnight under vacuum at 45~C, 14.2 g of purified, diphenyloxide free, imprinted polymer were recovered. As a control polymer exactly the same procedure was applied without diphenyloxide.
Preparation of the softeners The imprinted and the control polymers were both loaded with 5% w/w of diphenyloxide in 25 ml of diethyl ether and after homogenisation the solvent was completely evaporated.
CA 022~6079 1998-12-14 The resulting loaded polymers (4.8 g, cont~ining 0.233 g of diphenyloxid) were mixed each with a regular softener base (23.3 g, e.g. mixture Arquad 2HT from Akzo Chemie, Genapol T-150 and water in a ratio 5/1/100) and homogenized.
For the reference experiment 0.233 g diphenyloxide (1%/ softener base) was directly added to the same softener base.
Treatment of cotton towels with a softener The above prepared softeners were diluted with 3 liter of cold water and used for a softener treatment of newly washed cotton towels at room lo temperature during about 5 minutes by simulating a treatment in a washing m~chine. After treatment the towels have been centrifuged in a washing m~-~hine at 700 rotations/minute.
The towels have been evaluated olfactively by a panel of 10 persons and by head-space measurements in the humid state and after a 6 h and a 24 h 15 drying phase, respectively, at room temperature. The olfactive evaluation is summerized in Table 1 Table 1 Reference Control polymer Imprinted polymer humid state ++++ +++ +++
dry state after 6 h + ++ +++
drystate after 24h + + ++
++++ very strong +++ strong ++ moderate + weak Head-space measurements The head-space (4-10 ml for the humid and 1000 ml for the dry towels) were absorbed on an adsorbant (Tenax), extracted with hexane and the diphenyloxide content quantified by gas chromatography (GC) analysis (30 m x 0.32 mm CP-wax 52-CB column, 60~ C, 60-235~ C, 10~/min.). The results are listed in Table 2.
CA 022~6079 1998-12-14 Table 2 Concentration of diphenyloxide in the head-space (~g / 1 air) reference control polymer imprinted polymer humid state 108.8 4.62 0.193 dry state after 6 h0.193 0.634 0.845 dry state after 24 h0.193 0.456 0.566 ~ qmrle 2 Styrene/ethvlene ~lycol dimethacrylate polymer imprinted with a 5 standard fra~rance composition for use in a softener According the procedure described in Example 1 a polymer was imprinted with 1.2 g of a standard perfume composition cont~ining equivalent amounts of 15 volatile components as described in Table 5. The resulting polymer and corresponding control polymer have been used for the treatment of cotton o towels with a softener base according to Example 1 cont~ining a perfume loaded control polymer, a perfume loaded imprinted polymer and just the perfume as reference, respectively.
The towels have been evaluated olfactively by a panel of 10 persons and by head-space measurements as described in Example 1. The results are 15 summerized in Tables 3 to 5.
, CA 022~6079 1998-12-14 Table 3 Olfactive evaluation reference controlpolymer imprinted polymer humid state ++++ +++ +++
dry state after 6 h + ++ +++
dry state after 24 h + + ++
++++ very strong +++ strong ++ moderate + weak Table 4 5Head-space measurements Concentration of the perfume (total of the 15 components) in the head-space (ng / l air) reference control polymer imprinted polymer humid state 79693 47764 59483 dry state after 6 h 98.8 1819 2336 CA 022~6079 1998-12-14 Table 5 Concentration of the perfume components in the head-space after 6 h perfumereference control imprintedexcess imprinted component polymer polymer/control polymer (ng/l air) (ng/l air) (ngtl air) (%) amyl acetate 4.7 853 840 - 1.5 dimethyloctenon 2.2 356 604 +70 e eucalyptol 0.1 163 229 +41 cyclal 5.1 169 251 +49 linalool 0.1 42.3 74.3 +76 ald. C12MNA 15.2 30.8 43.8 +42 viridine 0.5 40.1 64.8 +62 terpineol 4.3 16.7 26.9 +61 benzyl acetate 3.1 58.8 86.6 +47 irisone 4.5 10.1 11.1 +10 verdyl acetate 2.2 18.4 27.2 +48 phenylethanol 1.4 10.5 14.0 +33 diphenyloxide 41.5 39.8 52.2 +31 prunolide 2 6.7 7.0 +5 lilial 12 3.9 4.0 +3 CA 022~6079 1998-12-14 mple 3 Methacrylic acid/ ethYlene ~1YCO1 dimethacrylate polymer imprinted with 3-methYl-2-hexenoic acid (sweat component) for deodorants Preparation of the molecularly imprinted polymer A mixture of a,oc'-azo-isobutyronitrile (AIBN, 82.1 mg, 0.5 mmol), ethyleneglycol dimethacrylate (9.91 g, 50 mmol), methacrylic acid (1.72 g, 20 mmol) and the sweat component 3-methyl-2-hexenoic acid (256.3 mg, 2 mmol) in toluene (20 ml) was magnetically stirred under argon while cooling in an ice bath until complete dissolution of the AIBN. The resulting solution was lo transfered into a photochemical reaction vessel as a thin layer of about 5 mmthickness, cooled on ice (4~ C) and placed under an W source (high pressure mercury lamp, 150 watts) during 17 hours. The resulting polymer was ground to small particles in a mechanical mixer. The polymeric powder was thoroughly washed resp. with a mixture of ethanol (240 ml), acetic acid (120 15 ml) and deionized water (240 ml), a mixture of ethanol (200 ml) and acetic acid (50ml) and finally with pure methanol (250 ml). After drying overnight under vacuum at 45~C, 8.21 g of purified, with 3-methyl-2-hexenoic acid imprinted polymer were recovered. As a control exactly the same procedure was applied without the methyl hexenoic acid.
The imprinted and the control polymers (100 mg) were each loaded with 1 ml of a diethyl-ether solution of 3-methyl-2-hexenoic acid (1 g/l), 1 ml of a diethylether solution of the standard perfume as described in Example 2, (1 g/l) and 50 lll of water. After homogenisation the ether is evaporated by gentleheating at about 40 ~C during 10 min. After 3 hours resting at room temperature in air the samples were olfactively evaluated:
In a panel of 9 persons 8 persons found that the imprinted sample has a much more pleasant, cleaner, less sweaty odour compared to the non-imprinted control.
CA 022~6079 1998-12-14 ~:x~mple 4 Methacrvlic acid/ ethylene glycol dimethacr~rlate polYmer imprinted with citronellol for use in air freshners. cosmetic products or fabric fibers 5 Preparation of the molecularly imprinted polymer without solvent A mixture of a,a'-azo-isobutyronitrile (AIBN, 65.7 mg, 0.4 mmol), ethyleneglycol dimethacrylate (9.91 g, 50 mmol), methacrylic acid (861.0 mg, 10 mmol) and citronellol (12.9 g, 83mmol) was magnetically stirred under argon while cooling in an ice bath until complete dissolution of the AIBN. The lo resulting solution was transfered into a photochemical reaction vessel as a thin layer of about 5 mm thickness, cooled on ice (4~ C) and placed under an W source (high pressure mercury lamp, 150 watts) during 16 hours. The resulting polymer was ground to small particles in a mechanical mixer. The polymeric powder was thoroughly washed with a mixture of ethanol (240 ml), 15 acetic acid (120 ml) and deionized water (240 ml), a mixture of ethanol (200 ml) and acetic acid (50ml) and finally with pure methanol (250 ml). After drying overnight under vacuum at 45~C, 8.21 g of purified, with citronellol imprinted polymer were recovered.
For a reference polymer imprinted with less citronellol the same 20 procedure was applied with additional 15 ml of toluene and only 195.9 mg (1.25 mmol of citronellol).
As a control exactly the same procedure was applied without citronellol and with 15 ml of toluene.
50 mg of each of the three polymers were suspended during 18 h in 5 ml 25 of a 70% methanol solution cont~ining 0.025 mg citronelloVml. After centrifugation the amount of adsorbed citronellol was evaluated by GC
analysis. The amounts of citronellol (%/polymer) adsorbed on the control polymer and on the imprinted polymers prepared with an without solvent are as presented in Table 6.
CA 022~6079 1998-12-14 Table 6 Control Reference polymer with citronellol as (no citronellol) (citronellol and solvent solvent) 059% 0.95~o 1.32%
The adsorption capacity for citronellol increases with the amount of citronellol used for imprinting.
mple 5 5 Methacrylic acid/ ethYlene ~lycol dimethacrvlate polvmer imprinted with citronellol for use in airfresners. cosmetic products or fabric fibers Preparation of the molecularly imprinted polymer in the presence of toluene lo A mixture of a,a'-azo-isobutyronitrile (AIBN, 82.1 mg, 0.5 mmol), ethyleneglycol dimethacrylate (9.91 g, 50 mmol), methacrylic acid (1.72 g, 20 mmol) and citronellol (2.476 g, 15.8 mmol) in toluene (10 ml) was magnetically stirred under argon while cooling in an ice bath until complete dissolution of the AIBN. The resulting solution was transferred into a photochemical 15 reaction vessel as a thin layer of about 5 mm thickness, cooled on ice (4~ C) and placed under an W source (high pressure mercury lamp, 150 watts) during 18 hours. The resulting polymer was ground to small particles in a mechanical mixer. The polymeric powder was thoroughly washed with a mixture of ethanol (240 ml), acetic acid (120 ml) and deionized water (240 ml), 20 a mixture of ethanol (200 ml) and acetic acid (50ml) and finally with pure methanol (250 ml). After drying overnight under vacuum at 45~C, 8.3 g of purified, with citronellol imprinted polymer were recovered. As a reference exactly the same procedure was applied without the citronellol.
Evaluation by adsorption in the solid phase 25 The imprinted polymer and the reference polymer were loaded with citronellol (50 mg/g as described in Example 1) and compared by GC analysis of methanol extracts and olfactive evaluation over a period of 14 days. The results are shown in Table 7.
CA 022~6079 1998-12-14 Table 7 ( mg/100 mg polymer) day 0 day 1 day 3 day 7 day 14 imprinted 3.5 3.3 4.0 3.8 3.6 polymer reference 3.9 3.0 3.2 3.2 3.3 polymer A panel of 11 persons found llnAnimously that the imprinted material relative to olfactive properties was significantly stronger after 18 days.
mple 6 5 Mixed styrene/methacrylic acid/ ethylene ~1YCO1 dimethacrylate polvmer imprinted with 2-phenylethanol for use in air freshners or fabric fibers Preparation of the molecularly imprinted polymer A mixture of a,a'-azo-isobutyronitrile (AIBN, 82.1 mg, 0.5 mmol), 0 ethyleneglycol dimethacrylate (9.91 g, 50 mmol), methacrylic acid (861.0 mg, 10 mmol), styrene (1.04 g, 10 mmol) and 2-phenylethanol (244.3 mg, 2 mmol) in toluene (20 ml) was magnetically stirred under argon while cooling in an ice bath until complete dissolution of the AIBN. The resulting solution was transfered into a photochemical reaction vessel as a thin layer of about 5 mm 15 thickness, cooled on ice (4~ C) and placed under an UV source (high pressure mercury lamp, 150 watts) during 17 hours. The resulting polymer was ground to small particles in a mechanical mixer. The polymeric powder was thoroughly washed resp. with a mixture of ethanol (240 ml), acetic acid (120 ml) and deionized water (240 ml), a mixture of ethanol (200 ml) and acetic 20 acid (50ml) and finally with pure methanol (250 ml). After drying over- night under vaccuum at 45~C, 6.45 g of purified, with phenylethanol imprinted polymer were recovered. As a reference exactly the same procedure was applied without phenylethanol.
CA 022~6079 1998-12-14 Evaluation by absorption in the solid phase Imprinted polymer and reference polymer samples were loaded with 50 mg/g phenylethanol, 50 mg/g citronellol and with the standard perfume composition (50 mg/g, 15 components, see Example 2) and evaluated after 14 5 days at room temperature by GC (Solid Phase Micro Extraction (SPME), Supelco). The results are summerized in Table 8.
Table 8 GC/SPME head-space evaluation of loaded polymers imprinted with phenylethanol Sample area counts imprinted loaded with phenylethanol96410 control loaded with phenylethanol 47577 imprinted loaded with citronellol 45262 control loaded with citronellol 47262 imprinted loaded with perfume* 11644 reference loaded with perfume * 9252 0 *perfume as described in Example 2 The results show that the phenylethanol imprinted polymer show high specificity for phenylethanol, specificity for the perfume and no specificity for citronellol.
Claims (29)
1. Polymer presenting binding sites for at least one organoleptic substance.
2. The polymer of claim 1 characterized in that the binding sites are molecularly imprinted with at least one organoleptic substance.
3. The polymer of claim 1 or 2, whereby the organoleptic substance is selected from the group consisting of odoriferous compounds, flavor compounds and malodor compounds.
4. The polymer of claim 3, whereby the odoriferous compounds are selected from the group consisting of alcohols, phenols, carboxylic acids, esters, carbonates, lactones, saturated or unsaturated ketones, aldehydes, aromatic compounds, nitrogen containing compounds or any mixture of such compounds.
5. The polymer of claim 3, whereby the flavor compounds are selected from the group consisting of of alcohols, phenols, carboxylic acids, esters, lactones, saturated or unsaturated ketones, aldehydes, aromatic compounds, nitrogen containing compounds or any mixture of such compounds.
6. The polymer of claim 3, whereby the malodor compounds are selected from compounds existing in human sweat, especially steroids, aliphatic acids and sulphur containing compounds.
7. The polymer according claim 6, wherein the malodor compound is 3-methyl-2-hexenoic acid.
8. The polymer of any one of the claims 1 to 6, whereby the odorifereous or flavor compound(s) is/are slowly released.
9. The polymer according to claim 8, wherein the slow release of the odorifereous compound(s) is/are effected by evaporation from the solid state or by release in an aqueous or an organic solvent suspension.
10. The polymer of any one of the claims 1 to 9 whereby the binding sites are partly imprinted with at least one odorifereous compound and are partly able to bind molodor compounds.
11. The polymer of any one of the claims 2 to 9 produced by a polymerization of at least one functional monomer and at least one cross-linking agent in the presence of at least one organoleptic substance.
12. The polymer of claim 11, whereby the imprinted organoleptic substance(s) is/are at least partly removed by washing the polymer in a solvent for the organoleptic substance(s).
13. The polymer according to claim 12, whereby the solvent is selected from the group consisting of ethanol, methanol, acetic acid and mixtures thereof, optionally with addition of water.
14. The polymer of claim 12, whereby the organoleptic substance(s) is/are (a) malodor compound(s).
15. The polymer of claim 12 characterized in that two types of binding sites are present, whereby one type is imprinted with odoriferous compound(s) and the other type has been imprinted with at least one malodor compound which malodor compound(s) thereafter has/have been dissolved by washing with an appropriate solvent.
16. The polymer according to claims 11, wherein the functional monomer exhibits a group with a double bond, preferably a methylene or a vinyl group.
17. The polymer according to claim 16, wherein the functional monomer is at least one of the group consisting of acrylic acid, methacrylic acid, styrene and phenylpropenyl derivatives.
18. The polymer according to claim 11, wherein the cross-linking agent exhibits at least two groups with double bonds, preferably two methylene or vinyl groups.
19. The polymer according to claim 18, wherein the cross-linking agent is ethylene glycol dimethyl acrylate, divinyl benzene or a mixture thereof.
20. The polymer according to any one of the claims 11 and 16 to 19, wherein the molar ratio of cross-linking agent/functional monomer is between 1 and 10, preferably between 2 and 5.
21. The polymer according to any one of the claims 11 and 16 to 20, wherein the molar ratio of cross-linking agent/imprinting odorifereous substance is between 0.5 and 50, preferably between 10 and 25.
22. The polymer according to any one of the claims 11 and 16 to 21, whereby the polymerization has been effected in the presence of a catalyst as a radical generator and/or UV light.
23. The polymer according to any one of the claims 11 and 16 to 22, whereby the polymer has been obtained by polyaddition, ring opening polymerization or polycondensation.
24. The polymer according to any one of the claims 1 to 23, used for perfuming cosmetic products, deodorants, air-refreshing products, laundry products, especially detergents or fabric softeners, and fabric fibers.
25. The polymer according to any one of the claims 10 or 12 to 15, whereby the imprinting of malodor compound(s) is/are used for reduction of malodor in deodorant, cosmetic, air-refreshing or laundry applications.
26. The polymer according to any one of the claims 1 to 25, whereby the imprinted substance(s) is present in about 1 to 10% by weight.
27. A process for the manufacture of the molecularly imprinted polymers according to any one of the claims 2 to 26 comprising polymerization of a mixture of functional monomer(s) and at least one cross-linking agent in the presence of at least one organoleptic substance followed by removal of the organoleptic substance(s).
28. A process for the manufacture of the molecularly imprinted polymers according to claim 1 comprising polymerization of a mixture of functional monomer(s) and at least one cross-linking agent in the presence of at least one organoleptic substance followed by removal of the organoleptic substance(s).
29. The process according to claim 27 or 28 whereby the removal is performed by washing with a solvent for the imprinted organoleptic substance(s).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97122122 | 1997-12-16 | ||
EP97122122.1 | 1997-12-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2256079A1 true CA2256079A1 (en) | 1999-06-16 |
Family
ID=8227806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2256079 Abandoned CA2256079A1 (en) | 1997-12-16 | 1998-12-14 | Polymer |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPH11240916A (en) |
CA (1) | CA2256079A1 (en) |
SG (1) | SG77209A1 (en) |
ZA (1) | ZA9811471B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ505525A (en) * | 2000-06-30 | 2003-03-28 | Horticulture & Food Res Inst | Polymers imprinted with phenols for the binding of phenols, and a method and sensor for the detection and/or measurement of a phenol by measuring the binding of phenol to the polymer |
JP4717328B2 (en) * | 2003-03-05 | 2011-07-06 | 北越紀州製紙株式会社 | A filter medium for an air filter, which is a sheet-like fibrous structure having a function of adsorbing gas molecules |
JP4541715B2 (en) * | 2004-01-23 | 2010-09-08 | 北越紀州製紙株式会社 | Sheet with molecular adsorption function |
JP2010503715A (en) * | 2006-09-19 | 2010-02-04 | ビーエーエスエフ ソシエタス・ヨーロピア | Cosmetic preparations based on molecularly imprinted polymers |
US9192193B2 (en) * | 2011-05-19 | 2015-11-24 | R.J. Reynolds Tobacco Company | Molecularly imprinted polymers for treating tobacco material and filtering smoke from smoking articles |
JP6396106B2 (en) * | 2014-07-25 | 2018-09-26 | 理研ビタミン株式会社 | Method for producing ultraviolet curable resin composition for deodorization |
JP6346020B2 (en) * | 2014-07-25 | 2018-06-20 | 理研ビタミン株式会社 | Method for producing deodorant ultraviolet curable resin composition |
-
1998
- 1998-12-11 SG SG1998005512A patent/SG77209A1/en unknown
- 1998-12-14 CA CA 2256079 patent/CA2256079A1/en not_active Abandoned
- 1998-12-14 ZA ZA9811471A patent/ZA9811471B/en unknown
- 1998-12-15 JP JP10356490A patent/JPH11240916A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JPH11240916A (en) | 1999-09-07 |
SG77209A1 (en) | 2000-12-19 |
ZA9811471B (en) | 1999-06-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0925776A2 (en) | Polymer with binding capacity for organoleptic substances | |
US7279542B2 (en) | Polymeric particles and fragrance delivery systems | |
US6218355B1 (en) | Slow release of fragrant compounds in perfumery using a keto esters | |
CA2502116C (en) | Polymeric assisted benefit agent delivery systems | |
JP5371766B2 (en) | Polymer conjugates for controlled release of active molecules | |
CN107250339B (en) | Poly (aspartic acid) -derived copolymers for the controlled release of perfuming ingredients | |
ZA200403708B (en) | Compounds for a controlled release of active molecules | |
EP2349196B1 (en) | Perfuming compositions and uses thereof | |
JP6762935B2 (en) | Polysiloxane as a fragrance delivery system in fine fragrances | |
CA2256079A1 (en) | Polymer | |
MX2014003798A (en) | Photolabile latex for the release of perfumes. | |
Berthier et al. | Influence of the backbone structure on the release of bioactive volatiles from maleic acid-based polymer conjugates | |
Herrmann | Profragrances and properfumes | |
EP1904541B1 (en) | Amphiphilic co-polymer conjugates for a controlled release of active molecules | |
EP4034628A1 (en) | Soap composition |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Dead |