WO1992002254A1 - Microcapsules a paroi mixte d'atelocollagene et de polyholosides coagulee par un cation bivalent - Google Patents
Microcapsules a paroi mixte d'atelocollagene et de polyholosides coagulee par un cation bivalent Download PDFInfo
- Publication number
- WO1992002254A1 WO1992002254A1 PCT/FR1991/000640 FR9100640W WO9202254A1 WO 1992002254 A1 WO1992002254 A1 WO 1992002254A1 FR 9100640 W FR9100640 W FR 9100640W WO 9202254 A1 WO9202254 A1 WO 9202254A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- atelocollagen
- solution
- microcapsules
- polyholosides
- sulfate
- Prior art date
Links
- 108010045569 atelocollagen Proteins 0.000 title claims abstract description 63
- 239000003094 microcapsule Substances 0.000 title claims abstract description 54
- 150000001768 cations Chemical class 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 46
- 238000005345 coagulation Methods 0.000 claims abstract description 24
- 230000015271 coagulation Effects 0.000 claims abstract description 24
- 238000001125 extrusion Methods 0.000 claims abstract description 22
- 239000002537 cosmetic Substances 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 235000013305 food Nutrition 0.000 claims abstract description 16
- 239000000701 coagulant Substances 0.000 claims abstract description 9
- 239000000243 solution Substances 0.000 claims description 55
- 239000000126 substance Substances 0.000 claims description 23
- 239000007864 aqueous solution Substances 0.000 claims description 18
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 15
- 239000012456 homogeneous solution Substances 0.000 claims description 14
- 229920002683 Glycosaminoglycan Polymers 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 229940094517 chondroitin 4-sulfate Drugs 0.000 claims description 10
- KXKPYJOVDUMHGS-OSRGNVMNSA-N chondroitin sulfate Chemical compound CC(=O)N[C@H]1[C@H](O)O[C@H](OS(O)(=O)=O)[C@H](O)[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](C(O)=O)O1 KXKPYJOVDUMHGS-OSRGNVMNSA-N 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 7
- 229920002307 Dextran Polymers 0.000 claims description 5
- 239000013543 active substance Substances 0.000 claims description 5
- 239000000839 emulsion Substances 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 229920001287 Chondroitin sulfate Polymers 0.000 claims description 4
- 229920000045 Dermatan sulfate Polymers 0.000 claims description 4
- HTTJABKRGRZYRN-UHFFFAOYSA-N Heparin Chemical compound OC1C(NC(=O)C)C(O)OC(COS(O)(=O)=O)C1OC1C(OS(O)(=O)=O)C(O)C(OC2C(C(OS(O)(=O)=O)C(OC3C(C(O)C(O)C(O3)C(O)=O)OS(O)(=O)=O)C(CO)O2)NS(O)(=O)=O)C(C(O)=O)O1 HTTJABKRGRZYRN-UHFFFAOYSA-N 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 239000004480 active ingredient Substances 0.000 claims description 4
- 239000000872 buffer Substances 0.000 claims description 4
- 239000007853 buffer solution Substances 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- AVJBPWGFOQAPRH-FWMKGIEWSA-L dermatan sulfate Chemical compound CC(=O)N[C@H]1[C@H](O)O[C@H](CO)[C@H](OS([O-])(=O)=O)[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@H](O)[C@H](C([O-])=O)O1 AVJBPWGFOQAPRH-FWMKGIEWSA-L 0.000 claims description 4
- 229940051593 dermatan sulfate Drugs 0.000 claims description 4
- 229920000669 heparin Polymers 0.000 claims description 4
- 229960002897 heparin Drugs 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000000661 sodium alginate Substances 0.000 claims description 4
- 235000010413 sodium alginate Nutrition 0.000 claims description 4
- 229940005550 sodium alginate Drugs 0.000 claims description 4
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 3
- 229920002971 Heparan sulfate Polymers 0.000 claims description 3
- 229920000288 Keratan sulfate Polymers 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 229910052788 barium Inorganic materials 0.000 claims description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000005018 casein Substances 0.000 claims description 3
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 claims description 3
- 235000021240 caseins Nutrition 0.000 claims description 3
- 150000003841 chloride salts Chemical class 0.000 claims description 3
- 238000010908 decantation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- KXCLCNHUUKTANI-RBIYJLQWSA-N keratan Chemical compound CC(=O)N[C@@H]1[C@@H](O)C[C@@H](COS(O)(=O)=O)O[C@H]1O[C@@H]1[C@@H](O)[C@H](O[C@@H]2[C@H](O[C@@H](O[C@H]3[C@H]([C@@H](COS(O)(=O)=O)O[C@@H](O)[C@@H]3O)O)[C@H](NC(C)=O)[C@H]2O)COS(O)(=O)=O)O[C@H](COS(O)(=O)=O)[C@@H]1O KXCLCNHUUKTANI-RBIYJLQWSA-N 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims description 2
- 238000006386 neutralization reaction Methods 0.000 claims description 2
- 235000011009 potassium phosphates Nutrition 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000001632 sodium acetate Substances 0.000 claims description 2
- 235000017281 sodium acetate Nutrition 0.000 claims description 2
- 239000001488 sodium phosphate Substances 0.000 claims description 2
- 235000011008 sodium phosphates Nutrition 0.000 claims description 2
- 229920001282 polysaccharide Polymers 0.000 claims 14
- 239000005017 polysaccharide Substances 0.000 claims 14
- 150000004676 glycans Chemical class 0.000 claims 11
- 239000001509 sodium citrate Substances 0.000 claims 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims 1
- 235000011083 sodium citrates Nutrition 0.000 claims 1
- 108010035532 Collagen Proteins 0.000 description 15
- 102000008186 Collagen Human genes 0.000 description 15
- 229920001436 collagen Polymers 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 108090000623 proteins and genes Proteins 0.000 description 8
- 239000002775 capsule Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 235000018102 proteins Nutrition 0.000 description 7
- 102000004169 proteins and genes Human genes 0.000 description 7
- 238000004132 cross linking Methods 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 210000003491 skin Anatomy 0.000 description 6
- 239000006228 supernatant Substances 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 235000021324 borage oil Nutrition 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 239000008223 sterile water Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- -1 Eparane- sulfate Chemical compound 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 244000194101 Ginkgo biloba Species 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 2
- 230000006862 enzymatic digestion Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 210000004379 membrane Anatomy 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 210000004400 mucous membrane Anatomy 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- 239000008194 pharmaceutical composition Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000012460 protein solution Substances 0.000 description 2
- 210000002784 stomach Anatomy 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229920001059 synthetic polymer Polymers 0.000 description 2
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229920002567 Chondroitin Polymers 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- 102100021587 Embryonic testis differentiation protein homolog A Human genes 0.000 description 1
- 101000898120 Homo sapiens Embryonic testis differentiation protein homolog A Proteins 0.000 description 1
- 235000019687 Lamb Nutrition 0.000 description 1
- 108090000526 Papain Proteins 0.000 description 1
- 239000004365 Protease Substances 0.000 description 1
- 208000025865 Ulcer Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 210000000577 adipose tissue Anatomy 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 244000309466 calf Species 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- DLGJWSVWTWEWBJ-HGGSSLSASA-N chondroitin Chemical compound CC(O)=N[C@@H]1[C@H](O)O[C@H](CO)[C@H](O)[C@@H]1OC1[C@H](O)[C@H](O)C=C(C(O)=O)O1 DLGJWSVWTWEWBJ-HGGSSLSASA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- XUJNEKJLAYXESH-UHFFFAOYSA-N cysteine Natural products SCC(N)C(O)=O XUJNEKJLAYXESH-UHFFFAOYSA-N 0.000 description 1
- 235000018417 cysteine Nutrition 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 210000004207 dermis Anatomy 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000008241 heterogeneous mixture Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 230000003387 muscular Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229940055729 papain Drugs 0.000 description 1
- 235000019834 papain Nutrition 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 239000008363 phosphate buffer Substances 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- YNJBWRMUSHSURL-UHFFFAOYSA-N trichloroacetic acid Chemical compound OC(=O)C(Cl)(Cl)Cl YNJBWRMUSHSURL-UHFFFAOYSA-N 0.000 description 1
- 230000036269 ulceration Effects 0.000 description 1
- 239000000341 volatile oil Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/11—Encapsulated compositions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/64—Proteins; Peptides; Derivatives or degradation products thereof
- A61K8/65—Collagen; Gelatin; Keratin; Derivatives or degradation products thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
- A61K8/735—Mucopolysaccharides, e.g. hyaluronic acid; Derivatives thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
- A61K8/97—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution from algae, fungi, lichens or plants; from derivatives thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
- A61K8/97—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution from algae, fungi, lichens or plants; from derivatives thereof
- A61K8/9771—Ginkgophyta, e.g. Ginkgoaceae [Ginkgo family]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/5005—Wall or coating material
- A61K9/5021—Organic macromolecular compounds
- A61K9/5036—Polysaccharides, e.g. gums, alginate; Cyclodextrin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/5005—Wall or coating material
- A61K9/5021—Organic macromolecular compounds
- A61K9/5052—Proteins, e.g. albumin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/04—Making microcapsules or microballoons by physical processes, e.g. drying, spraying
- B01J13/046—Making microcapsules or microballoons by physical processes, e.g. drying, spraying combined with gelification or coagulation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/41—Particular ingredients further characterized by their size
- A61K2800/412—Microsized, i.e. having sizes between 0.1 and 100 microns
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2984—Microcapsule with fluid core [includes liposome]
Definitions
- the present invention essentially relates to micro-caps with a mixed wall of ateLocoLLagene and of polysilosides coagulated by a bivaLent cation, a process for the manufacture of microcapsules and of cosmetic or pharmaceutical or whole compositions containing them.
- microcapsulation can be carried out by incorporating these active principles into microcapsules for their introduction into cosmetic products, pharmaceutical preparations or food products intended for various routes of administration such as the oral route, the parenteral route, the application to the skin and mucous membranes.
- various techniques have already been proposed for the manufacture of microcapsules using synthetic polymers. These latter substances allow easy industrial manufacture, but the microcapsules obtained are generally diffi cially biodegradable and, when they are, they give rise to degradation products which may be toxic, or whose toxicity is not known.
- the technique used comprises three stages: a) the emulsification of an alkaline aqueous solution of a protein in an organic solvent immiscible with water; b) interfacial crosslinking of the vesicles of the emulsion by means of a crosslinking agent which is generally an organic acid dichloride; and finally c) Isolation and washing of the microcapsules obtained using suitable solvents.
- the membrane consists only of protein, while in the second document it is composed of a mixture of proteins and polyholosides.
- EXTRAMET Another process known as the EXTRAMET process implemented by the company EXTRAMET makes it possible to obtain microcapsules by mechanically cutting a laminar flow produced by the extrusion of a material solution using a vibrator. polymerizable through a nozzle, which causes the formation of vesicles or droplets which can then be stiffened by drying or by crosslinking in a bath containing a crosslinking agent in which drop the vesicles or droplets.
- This technique can be applied to synthetic polymers or proteins.
- the encapsulation of a water-soluble active substance in a protein capsule will be obtained by dissolution in the protein solution before extrusion. If the active substance is in the oil form or if it is in solution in the oil, it will be encapsulated thanks to a coextrusion with the protein solution which is found outside the laminar flow.
- the inventors of the present invention have tried to use collagen in the methods described in the preceding documents as well as by using the EXTRAMET technique. These experiments ended in failure because these techniques are not applicable to collagen. Indeed, to obtain effective crosslinking, it is necessary to prepare collagen solutions in a strongly buffered medium at pH greater than or equal to 5.5.
- the present invention therefore aims to solve the new technical problem consisting in the supply of a solution making it possible to manufacture microcapsules whose wall comprises at least partially collagen or a product of collagen type having the same properties. that collagen, according to a simplified manufacturing process avoiding the use of crosslinking agent such as acid chlorides which must be eliminated.
- the present invention also aims to solve the new technical problem stated above, with the use of extremely simple manufacturing processes, usable on an industrial scale, and moreover making it possible to adjust the size of the microcapsules as desired, in particular in a range of dimensions ranging from approximately 100 to 3000 ⁇ m, in particular from 400 to 3000 -
- Microcapsules are thus obtained having remarkable physicomechanical properties, without having to carry out washing procedures unlike previously known methods.
- the present invention relates to microcapsules, characterized in that they comprise a mixed wall of atelocollagen and polyholosides, for example glycosaminoglycans, coagulated with a coagulation agent, preferably with base of a bivalent cation.
- the proportion of polyholosides, for example glycos ⁇ aminoglycans, relative to atelocoLlagen can vary from 15 to 50% by weight.
- the polyholosides are chosen from the group consisting of glycosaminoglycans such as glycosaminoglycans of structure chosen from the group consisting of chondroitin-4-sulfate, chondroitin-6-sulfate, dermatan- sulfate, heparan sulfate, keratane sulfate; as well as heparin and its derivatives; or dextran.
- glycosaminoglycans such as glycosaminoglycans of structure chosen from the group consisting of chondroitin-4-sulfate, chondroitin-6-sulfate, dermatan- sulfate, heparan sulfate, keratane sulfate; as well as heparin and its derivatives; or dextran.
- the mixed wall is formed by coagulation of an atelocollagen-polyholoside mixture, in particular glycosaminoglycans or dextran, by introducing the polyholoside solution into the atelo-collagen solution.
- concentration of polyholosides in the polyholoside solution is 0.5 to 4% by weight, more preferably 0.5 to 2%, and more preferably is close to 1%.
- the initial atelocollagen solution is an aqueous solution of atelocollagen having a concentration of between 0.5 and 2% by weight.
- This atelocollagen solution can be obtained according to the invention by dissolving atelocollagen fibers in a slightly acidic aqueous solution. These atelocollagen fibers are for example dissolved in 0.1 M acetic acid.
- atelocoL Lagene can be obtained by enzymatic digestion of collagen.
- atelocollagen and glycosamino glycans it is possible to introduce into the initial aqueous solution of atelocollagen and glycosamino glycans, or inside the microcapsules, one or more active principles desired in the state of solution, suspension or of ulceration, in particular one or more substances of cosmetic, pharmaceutical or food interest.
- the aforementioned bivalent cation used to coagulate the atelocolLagene-polyholoside solution is a bivalent cation chosen from the group consisting of calcium, magnesium, manganese, barium, zinc, in particular in the form salt such as chloride or sulfate.
- Preferred salts are the chloride salts.
- the coagulating agent is preferably present in a coagulation bath at a concentration of between 0.1 and 1% by weight. The higher this concentration, the harder the capsules obtained and the greater their mechanical resistance.
- microcapsules can also comprise a third substance coagulable by a coagulating agent, preferably a bivalent cation, in particular a sodium alginate or casein.
- a coagulating agent preferably a bivalent cation, in particular a sodium alginate or casein.
- a homogeneous initial composition of atelocollagen and of polyholosides will then comprise the following constituents intended to form the wall of the microcapsules:
- the present invention also relates to a process for manufacturing microcapsules, characterized in that it comprises the following successive steps: a) a solution of atelocollagen and a solution of polyholosides are prepared separately; b) mixing the atelocollagen solution with the polyholoside solution so as to form a homogeneous solution of atelocollagen and polyholosides; c) preparing a coagulation bath containing an appropriate coagulation agent, preferably a bivalent cation; d) individual droplets are formed from the homogeneous solution of atelocollagen and of polyholosides which are dropped into said coagulation bath, thereby obtaining microcapsules by coagulation of atelocoLlagen and of poly ⁇ holosides under the effect coagulation agent; and e) the microcapsules are separated by any suitable means, in particular by natural decantation after having possibly carried out one or more washes.
- the coagulating agent is a bivalent cation preferably chosen from the group consisting of calcium, magnesium, manganese, barium, zinc, in particular in the form of a salt such as a chloride or sulfate salt, the chloride salt being preferred.
- concentration of the divalent cation in the coagulation bath is advantageously between 0.1 and 1% by weight.
- a substance coagulable with the coagulation agent is also mixed in the solution of atelocollagen and of poly ⁇ holosides. especially sodium alginate or casein.
- the abovementioned individual droplets are formed by a laminar extrusion of the homogeneous solution of atelocollagen and of polyholosides through an extrusion nozzle while subjecting the flow. Laminar to vibrations to dislocate Laminar flow in said individual droplets.
- a laminar coextrusion of the homogeneous solution of atelocollagen and of polyholosides and of the substance to be encapsulated is carried out through an extrusion nozzle, while subjecting the laminar flow to vibrations to dislocate the laminar flow into individual droplets.
- the atelocollagen-polyholosides mixture is produced by introducing the polyholoside solution into the atelocollagen solution.
- the polyholoside solution is prepared by dissolving the polyholoside, preferably obtained in the dry state, for example by having been lyophilized, in an aqueous solution whose pH is adjusted so that after mixing with the atelocollagen solution, the pH of the mixture is between 5.5 and 10.
- the aqueous solution is a basic buffer solution.
- This basic buffer solution may be an aqueous solution of sodium hydroxide or preferably an aqueous solution of a basic buffer obtained by neutralization of a weak acid with a strong base p .
- a strong base p such as for example sodium carbonate, sodium acetate or so ⁇ ium citrate, or in solutions of sodium and potassium phosphates.
- the concentration of polyholosides relative to the concentration of atelocoLlagen is from 15 to 50% by weight.
- the concentration of polyholosides in the polyholoside solution is from 0.5 to 4%, even better from 0.5 to 2%, and more preferably is close to 1%. According to another characteristic of the processes of
- the atelocollagen solution is an aqueous solution of atelocollagen having a concentration of between 0.5 and 2% by weight.
- This atelocollagen solution can be obtained according to the invention by dissolving atelocollagen fibers in a slightly acidic aqueous solution.
- these atelocollagen fibers are dissolved in 0.1 M acetic acid.
- atelocoLlagen is obtained by enzymatic digestion of collagen.
- the polyholosides used according to the invention are chosen from glycosaminoglycans with a structure chosen from the group consisting of chondroitin-4-sulfate, chondroitin-6-sulfate, dermatan-sulfate, Eparane- sulfate, keratan sulfate; as well as heparin and its derivatives; or dextran.
- One or more desired active ingredients can be introduced into the aqueous solution of atelo ⁇ collagen and of polyholosides in the form of a solution, suspension or solution, in particular one or more substances of cosmetic, pharmaceutical or food interest. .
- the oily phase is the encaosulated phase
- the present invention also relates to a cosmetic composition or a pharmaceutical composition, characterized in that it comprises microcapsules with a mixed atelocollagen-polyholoside wall coagulated by a coagulating agent, preferably a bivalent cation.
- these microcapsules contain at least in part an active principle, in particular a cosmetic active principle, a pharmaceutical, or food active principle.
- microcapsules with an average diameter of ⁇ OO ⁇ iim containing borage oil are produced.
- the freshly slaughtered calf skin is subjected to epi-
- the dermis is then isolated from the rest of the skin by a slitting operation using a rotating band saw.
- the fabric obtained is ground and extruded through a grid with 4 mm holes.
- the ground material is then brought into contact for 3 weeks with a saturated Lime Milk at a rate of 1 kg for 4 L of solution.
- the skin thus treated is separated from the supernatant by continuous centrifugation under an acceleration of 2,000 g using a decanter rotating at 4,000 rpm.
- the pellet is then subjected to two washes with running water in a stainless steel tank with slow stirring at the rate of 1 kg for 4 l of bath.
- the ground material is then subjected to two treatments of the phosphate buffer pH 7.8 (21.7 g / l of a 2 HP0 4 and 0.78 g / L of KH 2 P0> under the same conditions as for washing with
- the cup is then washed by two baths of deionized and sterile water.
- the ground material obtained is placed in a solution of acetic acid (0.5 g / L, pH 3.4) at a rate of 1 kg per 20 l
- the supernatant is separated from the pellet by continuous decantation according to the preceding technique, the collagen is then precipitated by the supernatant by addition of dry sodium chloride in a proportion of approximately 10% relative to the
- the fibers obtained are dialyzed against deionized and sterile water using dialysis membranes, preferably formed by hoses whose cutoff threshold is between 6,000 and 8,000 daltons.
- the supernatant is separated from the pellet by continuous centrifugation using a decanter rotating at 4,000 rpm. 40 g / l of trichloroacetic acid are then added to the supernatant. The precipitate is removed by continuous centrifugation according to the previous technique. The supernatant is neutralized using soda in tablet. The mixture is then dialyzed against deionized and sterile water using hoses whose cutoff threshold is between 6000 and 8000 daltons. The dialyzed solution is lyophilized. Chondroitin-4-sulfate is obtained in the dry state.
- the atelocolLagene in the form of fiber originating from the dialysis hoses is dissolved in an aqueous solution of 0.1 M acetic acid so as to obtain a concentration of atelo ⁇ collagen of 3.2%.
- This solution is diluted with a solution of chondroitin-4-sulfate in sodium hydroxide, the volume and the concentrations of which are such that the final concentrations of the hornogenic gene mixture of atelocollagen and chondroitin-4-sulfate are those given in table below and that the pH of the medium is close to 7.5:
- the pH of the solution is adjusted to 7.5 either with sodium hydroxide or with hydrochloric acid. 2 kg of this solution are thus prepared.
- This device essentially comprises an extrusion nozzle 10 making it possible to achieve coextrusion by the presence of two concentric orifices supplied separately by two supply conduits 12, 14 serving, for example, respectively for the external supply of atelocollagen solution- glycosaminoglycans according to the invention from a reservoir 16, and inside an active principle for example borage oil from a reservoir of active principle 18.
- a vibrating device 20 controlled by means of control 22.
- This device also comprises a crosslinking bath 24 placed at a distance under the nozzle 10 in which the solution of coagulating agent 25 is placed.
- This apparatus also comprises an electrode 26 with a helical end 28 disposed concentrically with the flow of the laminar flow 30 coextruded from the nozzle 10 so as to separate the droplets generated by the vibrator 20. It is also possible to provide a strobe device by flash 32 to visually observe the droplets thus generated falling into the coagulation bath 25.
- the flow rate of the homogeneous solution of atelocollagen and of the glycosaminoglycan present in the reservoir 16 is 2.4 l / h and that of the borage oil present in the reservoir 18, constituting the active principle, is 1.2 l. / h.
- the vibration frequency of the fiberiser 20 is 230 MHz.
- the diameters of the two concentric openings are 400 and 600 .m.
- the droplets 34 generated by the vibrator 20 from the laminar flow produced in the coextrusion nozzle 10 are received in 1 L of coagulation bath 25 kept under agitation. The bath is renewed after extrusion of 1 kg of the homogeneous solution of atelocollagen and glycosaminoglycans. f) Washing and storage
- the capsules recovered by filtration are placed in a 10 l bath of deionized water and kept under stirring for 15 min. At the end of this period of time, they are again recovered by filtration and placed in a bath of 2 l of water has been previously dissolved 1% of a solution. propylene glycol. The volumes of the latter two compounds being equal. Under such conditions, the capsules can be stored at room temperature.
- Extrusion and coagulation of the microcapsules are carried out under the same conditions as those described in Example 1, except as regards the flow rate which is 2 L / h for the homogeneous solution of atelocollagen and chondroitin. 4-sulfate containing Ginko Biloba extract.
- these microcapsules make it possible, when used orally, to mask the taste of the active ingredient, as well as protection in the stomach or a delayed effect thanks to gastroresistance which can be obtained by coagulation appropriate.
- the present invention also relates generally to a process for the preparation of a cosmetic, pharmaceutical or food composition, characterized in that one incorporates at least in part microcaspsules with a mixed atelocollagen-coagulated polyholoside wall in which there are preferably at least partially encapsulated a substance of cosmetic, pharmaceutical or food interest.
- microcapsules also allow the protection of fragile materials such as essential oils likely to enter the food composition.
- Other uses of these microcapsules will be apparent to those skilled in the art.
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- Mycology (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP91914790A EP0542855B1 (fr) | 1990-08-03 | 1991-08-02 | Microcapsules a paroi mixte d'atelocollagene et de polyholosides coagulee par un cation bivalent |
DE69104988T DE69104988T2 (de) | 1990-08-03 | 1991-08-02 | Mikrokapseln mit wänden aus mischungen von durch bivalenten kationen koagulierten atelokollogen und polyholosiden. |
US07/975,582 US5525359A (en) | 1990-08-03 | 1991-08-02 | Microcapsules having a combined atelocollagen/polyholoside wall coagulated by a divalent cation and method for manufacturing these microcapsules and cosmetic or pharmaceutical or food compositions containing them |
KR937000300A KR930701157A (fr) | 1990-08-03 | 1993-02-02 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9009997A FR2665374B1 (fr) | 1990-08-03 | 1990-08-03 | Microcapsules a paroi mixte d'atelocollagene et de polyholosides coagulee par un cation bivalent et procede de fabrication de ces microcapsules et des compositions cosmetiques ou pharmaceutiques ou alimentaires en contenant. |
FR90/09997 | 1990-08-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992002254A1 true WO1992002254A1 (fr) | 1992-02-20 |
Family
ID=9399434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1991/000640 WO1992002254A1 (fr) | 1990-08-03 | 1991-08-02 | Microcapsules a paroi mixte d'atelocollagene et de polyholosides coagulee par un cation bivalent |
Country Status (11)
Country | Link |
---|---|
US (1) | US5525359A (fr) |
EP (1) | EP0542855B1 (fr) |
JP (1) | JPH06500496A (fr) |
KR (1) | KR930701157A (fr) |
AT (1) | ATE113480T1 (fr) |
AU (1) | AU8337391A (fr) |
CA (1) | CA2087955A1 (fr) |
DE (1) | DE69104988T2 (fr) |
ES (1) | ES2066462T3 (fr) |
FR (1) | FR2665374B1 (fr) |
WO (1) | WO1992002254A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6001393A (en) * | 1990-08-20 | 1999-12-14 | Daoud; Abdulwahid H. | Ginkgo biloba extract enhanced bioavailability composition and food products |
US7923250B2 (en) | 1997-07-30 | 2011-04-12 | Warsaw Orthopedic, Inc. | Methods of expressing LIM mineralization protein in non-osseous cells |
WO1999006563A1 (fr) | 1997-07-30 | 1999-02-11 | Emory University | Nouvelle proteine de mineralisation osseuse, adn, vecteurs et systemes d'expressions |
ES2162746B1 (es) * | 1999-10-21 | 2003-02-16 | Lipotec Sa | Microcapsulas para la estabilizacion de productos cosmeticos, farmaceuticos o de alimentacion. |
US6986847B2 (en) | 2002-05-10 | 2006-01-17 | New Jersey Institute Of Technology | Method and apparatus for isolation and purification of biomolecules |
EP1454610A1 (fr) * | 2003-03-06 | 2004-09-08 | Cognis France S.A. | Compositions cosmétique et/ou pharmaceutique comprenant des extraits de plantes |
KR100902781B1 (ko) * | 2007-10-05 | 2009-06-12 | (주)라이프코드 | 일체형 무균 캡슐 제조장치 |
BE1028699B1 (fr) * | 2020-10-13 | 2022-05-16 | Eleonor | Composition comprenant au moins un diterpène labdanique et son procédé de fabrication |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1388580A (en) * | 1972-01-08 | 1975-03-26 | Toray Industries | Hydrogels |
EP0209726A2 (fr) * | 1985-06-25 | 1987-01-28 | Merz & Co. GmbH & Co. | Eponge soluble de collagène |
FR2642329A1 (fr) * | 1989-01-31 | 1990-08-03 | Bioetica Sa | Utilisation de solutions d'atelocollagene et de glycosaminoglycannes pour la fabrication de microcapsules, microcapsules ainsi realisees, procedes de fabrication de telles microcapsules et compositions cosmetiques ou pharmaceutiques ou alimentaires en contenant |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2471827A1 (fr) * | 1979-12-21 | 1981-06-26 | Extramet Sa | Dispositif pour la production de granules metalliques uniformes |
CA1175618A (fr) * | 1981-01-30 | 1984-10-09 | Gerard Bienvenu | Methode et dispositif de production de metal granule |
FR2527438B1 (fr) * | 1982-05-26 | 1985-08-09 | Centre Nat Rech Scient | Microcapsules a paroi constituee par des polyholosides reticules et leur procede de preparation |
EP0230654B1 (fr) * | 1985-12-28 | 1992-03-18 | Sumitomo Pharmaceuticals Company, Limited | Préparation pharmaceutique à libération retardée intermittante |
FR2600000B1 (fr) * | 1986-06-13 | 1989-04-14 | Extramet Sa | Procede et dispositif de granulation d'un metal fondu |
EP0381543B1 (fr) * | 1989-01-31 | 1993-05-26 | Coletica | Utilisation de solutions d'atélocollagène et de glycosaminoglycannes pour la fabrication de microcapsules, microcapsules ainsi réalisées, procédés de fabrication de telles microcapsules et compositions cosmétiques ou pharmaceutiques ou alimentaires en contenant |
FR2652741B1 (fr) * | 1989-10-10 | 1994-03-04 | Laboratoires Care System | Composition antimicrobienne pour application sur la peau, applications comme deodorant corporel et bactericide cutane. |
-
1990
- 1990-08-03 FR FR9009997A patent/FR2665374B1/fr not_active Expired - Lifetime
-
1991
- 1991-08-02 US US07/975,582 patent/US5525359A/en not_active Expired - Lifetime
- 1991-08-02 EP EP91914790A patent/EP0542855B1/fr not_active Expired - Lifetime
- 1991-08-02 AT AT91914790T patent/ATE113480T1/de active
- 1991-08-02 WO PCT/FR1991/000640 patent/WO1992002254A1/fr active IP Right Grant
- 1991-08-02 DE DE69104988T patent/DE69104988T2/de not_active Expired - Fee Related
- 1991-08-02 JP JP3513590A patent/JPH06500496A/ja active Pending
- 1991-08-02 ES ES91914790T patent/ES2066462T3/es not_active Expired - Lifetime
- 1991-08-02 AU AU83373/91A patent/AU8337391A/en not_active Abandoned
- 1991-08-02 CA CA002087955A patent/CA2087955A1/fr not_active Abandoned
-
1993
- 1993-02-02 KR KR937000300A patent/KR930701157A/ko unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1388580A (en) * | 1972-01-08 | 1975-03-26 | Toray Industries | Hydrogels |
EP0209726A2 (fr) * | 1985-06-25 | 1987-01-28 | Merz & Co. GmbH & Co. | Eponge soluble de collagène |
FR2642329A1 (fr) * | 1989-01-31 | 1990-08-03 | Bioetica Sa | Utilisation de solutions d'atelocollagene et de glycosaminoglycannes pour la fabrication de microcapsules, microcapsules ainsi realisees, procedes de fabrication de telles microcapsules et compositions cosmetiques ou pharmaceutiques ou alimentaires en contenant |
Also Published As
Publication number | Publication date |
---|---|
DE69104988T2 (de) | 1995-05-18 |
ES2066462T3 (es) | 1995-03-01 |
EP0542855A1 (fr) | 1993-05-26 |
US5525359A (en) | 1996-06-11 |
ATE113480T1 (de) | 1994-11-15 |
JPH06500496A (ja) | 1994-01-20 |
CA2087955A1 (fr) | 1992-02-04 |
FR2665374B1 (fr) | 1992-12-04 |
EP0542855B1 (fr) | 1994-11-02 |
AU8337391A (en) | 1992-03-02 |
DE69104988D1 (de) | 1994-12-08 |
FR2665374A1 (fr) | 1992-02-07 |
KR930701157A (fr) | 1993-06-11 |
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