HK70490A - Small particle formation and encapsulation - Google Patents
Small particle formation and encapsulationInfo
- Publication number
- HK70490A HK70490A HK704/90A HK70490A HK70490A HK 70490 A HK70490 A HK 70490A HK 704/90 A HK704/90 A HK 704/90A HK 70490 A HK70490 A HK 70490A HK 70490 A HK70490 A HK 70490A
- Authority
- HK
- Hong Kong
- Prior art keywords
- solution
- compound
- encapsulating material
- process according
- acid
- Prior art date
Links
Classifications
-
- 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
- A61K9/5042—Cellulose; Cellulose derivatives, e.g. phthalate or acetate succinate esters of hydroxypropyl methylcellulose
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
-
- 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
- A61K9/5026—Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
-
- 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
- A61K9/5042—Cellulose; Cellulose derivatives, e.g. phthalate or acetate succinate esters of hydroxypropyl methylcellulose
- A61K9/5047—Cellulose ethers containing no ester groups, e.g. hydroxypropyl methylcellulose
-
- 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
- A61K9/5057—Gelatin
-
- 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
- A61K9/5089—Processes
-
- 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
- B01J13/06—Making microcapsules or microballoons by phase separation
- B01J13/10—Complex coacervation, i.e. interaction of oppositely charged particles
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dental Preparations (AREA)
- Medicinal Preparation (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Claims (10)
1. Un procédé pour l'encapsulation d'un composé organique faiblement acide dont la solubilité dans l'eau à un premier pH est supérieure à celle à un second pH, procédé qui consiste :
(a) à dissoudre ledit composé dans de l'eau en présence de suffisamment de base pour élever le pH jusqu'au premier pH et à au moins 2 unités de pH au-dessus du pKa du composé, conjointement avec une substance d'encapsulation et un électrolyte qui est efficace, mais présent en une quantité juste insuffisante pour provoquer la coacervation de la substance d'encapsulation sans interagir avec elle ;
(b) à agiter et à titrer la solution avec un agent de titrage efficace pour réduire le pH de ladite solution jusqu'au second pH en provoquant la précipitation simultanée du composé sous forme de fines particules et la formation d'un coacervat de la substance d'encapsulation, et
(c) à gélifier la substance d'encapsulation.
2. Un procédé pour l'encapsulation d'un composé organique faiblement basique dont la solubilité dans l'eau à un premier pH est supérieure à celle à un second pH, procédé qui consiste :
(a) à dissoudre ledit composé dans de l'eau en présence de suffisamment d'acide pour abaisser le pH jusqu'au premier pH et à au moins 2 unités de pH au-dessous du pKa du composé, conjointement avec une substance d'encapsulation et une quantité d'un électrolyte qui est efficace, mais juste insuffisante pour provoquer la coacervation de la substance d'encapsulation sans interagir avec elle ;
(b) à agiter et à titrer la solution avec un agent de titrage efficace pour élever le pH de ladite solution jusqu'au second pH en provoquant la précipitation simultanée du composé sous forme de fines particules et la formation d'un coacervat de la substance d'encapsulation, et
(c) à gélifier la substance d'encapsulation.
3. Procédé selon la revendication 1 ou 2, dans lequel le composé est pharmaceutiquement actif.
4. Procédé selon la revendication 2, dans lequel le composé est de la sulfadiazine en solution avec du sulfate de sodium contenant de l'alcool éthylique et la substance d'encapsulation est une solution de gélatine.
5. Procédé selon la revendication 3, dans lequel le premier pH est un pH acide.
6. Procédé selon la revendication 1 ou 2, dans lequel un agent mouillant est utilisé dans l'étape a).
7. Procédé selon la revendication 1 ou 2, dans lequel la température est réglée dans l'étape b).
8. Procédé selon la revendication 1, dans lequel le composé pharmaceutiquement actif est choisi dans le groupe composé de bacampicilline, de griséofulvine, d'indométhacine, de sulfadiazine sodique, d'érythromycine, de théophylline, d'acide salicylique, d'acide acétylsalicylique, de chlorozoxazone, de lidocaïne et d'alaproclate.
9. Procédé selon la revendication 1, dans lequel la substance d'encapsulation est choisie dans le groupe composé de gélatine, de méthylcellulose, de carboxyméthylcellulose de sodium, d'acéto-phtalate de cellulose et de polyvinylpyrrolidone.
10. Procédé selon la revendication 4, dans lequel le rapport entre le composé, la substance d'encapsulation, l'agent mouillant et l'électrolyte est d'environ (0,1-6) : (0,1-4) : (0,1-10) : (0,4-48).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US50659983A | 1983-06-22 | 1983-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| HK70490A true HK70490A (en) | 1990-09-14 |
Family
ID=24015260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| HK704/90A HK70490A (en) | 1983-06-22 | 1990-09-06 | Small particle formation and encapsulation |
Country Status (13)
| Country | Link |
|---|---|
| EP (1) | EP0130162B1 (fr) |
| KR (1) | KR910002643B1 (fr) |
| AT (1) | ATE29392T1 (fr) |
| CA (1) | CA1222456A (fr) |
| CY (1) | CY1558A (fr) |
| DE (1) | DE3465888D1 (fr) |
| ES (1) | ES8603263A1 (fr) |
| HK (1) | HK70490A (fr) |
| IL (1) | IL72106A (fr) |
| MY (1) | MY102469A (fr) |
| NZ (1) | NZ208579A (fr) |
| PH (1) | PH20754A (fr) |
| SG (1) | SG55290G (fr) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606940A (en) * | 1984-12-21 | 1986-08-19 | The Ohio State University Research Foundation | Small particle formation and encapsulation |
| IT1214629B (it) * | 1985-08-29 | 1990-01-18 | Formenti Farmaceutici Spa | Procedimento di microincapsulazione di un medicamento,medicamento cosi'preparato,e composizioni farmaceutiche che lo comprendono |
| AU591248B2 (en) * | 1986-03-27 | 1989-11-30 | Kinaform Technology, Inc. | Sustained-release pharaceutical preparation |
| DE3790487C2 (de) * | 1986-08-18 | 1994-08-18 | Emisphere Tech Inc | Mikroverkapselung für pharmakologische Mittel |
| USRE35862E (en) * | 1986-08-18 | 1998-07-28 | Emisphere Technologies, Inc. | Delivery systems for pharmacological agents encapsulated with proteinoids |
| DE3745075C2 (de) * | 1986-08-18 | 1997-04-30 | Emisphere Tech Inc | Mikroverkapselung für pharmakologische Mittel |
| IL84167A (en) * | 1986-10-24 | 1991-04-15 | Southern Res Inst | Oral delivery of bioactive agents to and through the peyer's patch by use of microencapsulation |
| US5075109A (en) * | 1986-10-24 | 1991-12-24 | Southern Research Institute | Method of potentiating an immune response |
| US6024983A (en) * | 1986-10-24 | 2000-02-15 | Southern Research Institute | Composition for delivering bioactive agents for immune response and its preparation |
| GB8628728D0 (en) * | 1986-12-02 | 1987-01-07 | Euro Celtique Sa | Spheroids |
| US5035896A (en) * | 1988-06-15 | 1991-07-30 | Warner-Lambert Company | Water insoluble drugs coated by coacervated fish gelatin |
| US6344213B1 (en) | 1996-03-29 | 2002-02-05 | Emisphere Technologies, Inc. | Compounds and compositions for delivering active agents |
| US5447728A (en) * | 1992-06-15 | 1995-09-05 | Emisphere Technologies, Inc. | Desferrioxamine oral delivery system |
| US5578323A (en) | 1992-06-15 | 1996-11-26 | Emisphere Technologies, Inc. | Proteinoid carriers and methods for preparation and use thereof |
| US5629020A (en) * | 1994-04-22 | 1997-05-13 | Emisphere Technologies, Inc. | Modified amino acids for drug delivery |
| US5714167A (en) | 1992-06-15 | 1998-02-03 | Emisphere Technologies, Inc. | Active agent transport systems |
| US5443841A (en) * | 1992-06-15 | 1995-08-22 | Emisphere Technologies, Inc. | Proteinoid microspheres and methods for preparation and use thereof |
| US5401516A (en) * | 1992-12-21 | 1995-03-28 | Emisphere Technologies, Inc. | Modified hydrolyzed vegetable protein microspheres and methods for preparation and use thereof |
| US6001347A (en) | 1995-03-31 | 1999-12-14 | Emisphere Technologies, Inc. | Compounds and compositions for delivering active agents |
| US5750147A (en) | 1995-06-07 | 1998-05-12 | Emisphere Technologies, Inc. | Method of solubilizing and encapsulating itraconazole |
| AU3828597A (en) | 1996-06-14 | 1998-01-07 | Emisphere Technologies, Inc. | Microencapsulated fragrances and method for preparation |
| US6358504B1 (en) | 1997-02-07 | 2002-03-19 | Emisphere Technologies, Inc. | Compounds and compositions for delivering active agents |
| ES2207923T3 (es) * | 1999-01-06 | 2004-06-01 | Tecnimede-Sociedade Tecnico-Medicinal, S.A. | Procedimiento para formular matrices granuladas por precipitacion de polimeros en un medio acido. |
| EP4159201A1 (fr) | 2021-09-30 | 2023-04-05 | Biomind Labs Inc | Nanoparticules encapsulées et nanoparticules de diméthyltriptamines |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1542262A1 (de) * | 1965-03-05 | 1970-03-26 | Keuffel & Esser Co | Verfahren zur Herstellung von mit fluessigen oder festen Materialien gefuellten Kapseln |
| US3666678A (en) * | 1968-01-12 | 1972-05-30 | Benjamin Mosier | Process of encapsulating basic nitrogen compounds with acid-precursor gelatin |
| DE3013839A1 (de) * | 1979-04-13 | 1980-10-30 | Freunt Ind Co Ltd | Verfahren zur herstellung einer aktivierten pharmazeutischen zusammensetzung |
-
1984
- 1984-06-14 AT AT84850184T patent/ATE29392T1/de active
- 1984-06-14 DE DE8484850184T patent/DE3465888D1/de not_active Expired
- 1984-06-14 EP EP84850184A patent/EP0130162B1/fr not_active Expired
- 1984-06-14 IL IL72106A patent/IL72106A/xx not_active IP Right Cessation
- 1984-06-19 NZ NZ208579A patent/NZ208579A/en unknown
- 1984-06-20 PH PH30845A patent/PH20754A/en unknown
- 1984-06-20 ES ES533587A patent/ES8603263A1/es not_active Expired
- 1984-06-21 CA CA000457127A patent/CA1222456A/fr not_active Expired
- 1984-06-22 KR KR1019840003549A patent/KR910002643B1/ko not_active Expired
-
1987
- 1987-09-28 MY MYPI87001988A patent/MY102469A/en unknown
-
1990
- 1990-07-17 SG SG55290A patent/SG55290G/en unknown
- 1990-09-06 HK HK704/90A patent/HK70490A/en not_active IP Right Cessation
-
1991
- 1991-03-22 CY CY1558A patent/CY1558A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SG55290G (en) | 1990-09-07 |
| ATE29392T1 (de) | 1987-09-15 |
| MY102469A (en) | 1992-01-30 |
| CA1222456A (fr) | 1987-06-02 |
| KR910002643B1 (ko) | 1991-04-27 |
| IL72106A (en) | 1988-02-29 |
| EP0130162B1 (fr) | 1987-09-09 |
| IL72106A0 (en) | 1984-10-31 |
| KR850000239A (ko) | 1985-02-26 |
| NZ208579A (en) | 1986-12-05 |
| ES533587A0 (es) | 1985-12-16 |
| DE3465888D1 (en) | 1987-10-15 |
| ES8603263A1 (es) | 1985-12-16 |
| EP0130162A3 (en) | 1985-05-15 |
| CY1558A (en) | 1991-03-22 |
| PH20754A (en) | 1987-04-02 |
| EP0130162A2 (fr) | 1985-01-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |