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HK70490A - Small particle formation and encapsulation - Google Patents

Small particle formation and encapsulation

Info

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
Application number
HK704/90A
Other languages
German (de)
English (en)
Inventor
Sylvan Gerald Frank
Arne Folke Brodin
Chih-Ming James Chen
Siriporn Panthuvanich
Original Assignee
The Ohio State University Research Foundation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by The Ohio State University Research Foundation filed Critical The Ohio State University Research Foundation
Publication of HK70490A publication Critical patent/HK70490A/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/48Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50Microcapsules 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
    • A61K9/5005Wall or coating material
    • A61K9/5021Organic macromolecular compounds
    • A61K9/5036Polysaccharides, e.g. gums, alginate; Cyclodextrin
    • A61K9/5042Cellulose; Cellulose derivatives, e.g. phthalate or acetate succinate esters of hydroxypropyl methylcellulose
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05FORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F7/00Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/48Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50Microcapsules 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
    • A61K9/5005Wall or coating material
    • A61K9/5021Organic macromolecular compounds
    • A61K9/5026Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/48Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50Microcapsules 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
    • A61K9/5005Wall or coating material
    • A61K9/5021Organic macromolecular compounds
    • A61K9/5036Polysaccharides, e.g. gums, alginate; Cyclodextrin
    • A61K9/5042Cellulose; Cellulose derivatives, e.g. phthalate or acetate succinate esters of hydroxypropyl methylcellulose
    • A61K9/5047Cellulose ethers containing no ester groups, e.g. hydroxypropyl methylcellulose
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/48Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50Microcapsules 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
    • A61K9/5005Wall or coating material
    • A61K9/5021Organic macromolecular compounds
    • A61K9/5052Proteins, e.g. albumin
    • A61K9/5057Gelatin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/48Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50Microcapsules 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
    • A61K9/5089Processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/02Making microcapsules or microballoons
    • B01J13/06Making microcapsules or microballoons by phase separation
    • B01J13/10Complex 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).
HK704/90A 1983-06-22 1990-09-06 Small particle formation and encapsulation HK70490A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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)