GB1405108A - Manufacture of micorcapsules - Google Patents

Manufacture of micorcapsules

Info

Publication number
GB1405108A
GB1405108A GB5999571A GB5999571A GB1405108A GB 1405108 A GB1405108 A GB 1405108A GB 5999571 A GB5999571 A GB 5999571A GB 5999571 A GB5999571 A GB 5999571A GB 1405108 A GB1405108 A GB 1405108A
Authority
GB
United Kingdom
Prior art keywords
aqueous
polymers
forming
microcapsules
dec
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.)
Expired
Application number
GB5999571A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agfa Gevaert NV
Agfa Gevaert AG
Original Assignee
Agfa Gevaert NV
Agfa Gevaert AG
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
Priority to BE792550D priority Critical patent/BE792550A/en
Application filed by Agfa Gevaert NV, Agfa Gevaert AG filed Critical Agfa Gevaert NV
Priority to GB5999571A priority patent/GB1405108A/en
Priority to CA158,202A priority patent/CA985968A/en
Priority to FR7244094A priority patent/FR2164617B3/fr
Priority to DE19722262676 priority patent/DE2262676A1/en
Priority to JP47129195A priority patent/JPS4871782A/ja
Publication of GB1405108A publication Critical patent/GB1405108A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01J13/08—Simple coacervation, i.e. addition of highly hydrophilic material
    • 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
    • B01J13/12—Making microcapsules or microballoons by phase separation removing solvent from the wall-forming material solution
    • B01J13/125—Making microcapsules or microballoons by phase separation removing solvent from the wall-forming material solution by evaporation of the solvent

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Fertilizers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Medicinal Preparation (AREA)

Abstract

1405108 Microcapsules AGFA-GEVAERT 11 Dec 1972 [23 Dec 1971] 59995/71 Heading B8C Microcapsules are prepared by emulsifying an aqueous fill material in a solution of a waterinsoluble film-forming material in a waterimmiscible solvent and rapidly adding further aqueous material so as to form a water (oil) water type emulsion, the quantities of liquids being chosen so that the volume of the first aqueous phase is not greater than that corresponding to the 1st insertion point of the system and the volumes of the first and second aqueous phases together are substantially equal to or higher than that corresponding to the second inversion point of the system. Thereafter the solvent is removed by evaporation (usually with continuous stirring), thereby forming the miorocapsules, which may be hardened &c. in conventional manner. Numerous suitable film-forming materials are mentioned which are addition polymers and copolymers, condensation polymers or modified natural polymers, e.g. vinyl polymers, acrylics, polyamides, polyesters, polycarbonates, poly-sulphonates, polyphosphonates, polyurethanes and cellulose derivatives. The core material may likewise be selected from a wide field of substances which are conventionally microencapsulated, particular reference being made to photographic chemicals such as gelatin silver halides, dyes, colour formers, colour reactants, development activators and retarders and bleaches. The aqueous phases may be the same or different, and the viscosity of the first aqueous phase may be increased by addition of suitable materials.
GB5999571A 1971-12-23 1971-12-23 Manufacture of micorcapsules Expired GB1405108A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE792550D BE792550A (en) 1971-12-23 PROCEDURE FOR MANUFACTURE OF MICROCAPSULES
GB5999571A GB1405108A (en) 1971-12-23 1971-12-23 Manufacture of micorcapsules
CA158,202A CA985968A (en) 1971-12-23 1972-12-06 Manufacture of microcapsules
FR7244094A FR2164617B3 (en) 1971-12-23 1972-12-11
DE19722262676 DE2262676A1 (en) 1971-12-23 1972-12-21 METHOD FOR FORMING MICROCAPSULES
JP47129195A JPS4871782A (en) 1971-12-23 1972-12-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5999571A GB1405108A (en) 1971-12-23 1971-12-23 Manufacture of micorcapsules

Publications (1)

Publication Number Publication Date
GB1405108A true GB1405108A (en) 1975-09-03

Family

ID=10484810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5999571A Expired GB1405108A (en) 1971-12-23 1971-12-23 Manufacture of micorcapsules

Country Status (6)

Country Link
JP (1) JPS4871782A (en)
BE (1) BE792550A (en)
CA (1) CA985968A (en)
DE (1) DE2262676A1 (en)
FR (1) FR2164617B3 (en)
GB (1) GB1405108A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4954298A (en) * 1985-02-07 1990-09-04 Takeda Chemical Industries, Ltd. Method for producing microcapsule
US5652220A (en) * 1986-08-08 1997-07-29 Takeda Chemical Industries, Ltd. Encapsulation of TRH or its analog
US5945126A (en) * 1997-02-13 1999-08-31 Oakwood Laboratories L.L.C. Continuous microsphere process
US6270802B1 (en) 1998-10-28 2001-08-07 Oakwood Laboratories L.L.C. Method and apparatus for formulating microspheres and microcapsules
US6294204B1 (en) 1995-11-24 2001-09-25 Inhale Therapeutic Systems, Inc. Method of producing morphologically uniform microcapsules and microcapsules produced by this method
US6528093B1 (en) 1992-12-07 2003-03-04 Takeda Chemical Industries, Ltd. Sustained-release preparation
US6899898B2 (en) 2000-12-21 2005-05-31 Nektar Therapeutics Induced phase transition method for the production of microparticles containing hydrophobic active agents
US6955823B2 (en) 2001-02-26 2005-10-18 Syngenta Crop Protection, Inc. Process for making microcapsules involving phase inversion
CN112341585A (en) * 2020-11-05 2021-02-09 青岛科技大学 Redispersible waterborne polyurethane powder and preparation method thereof
CN115212817A (en) * 2022-06-29 2022-10-21 珠海麦得发生物科技股份有限公司 Preparation system of microspheres and method for preparing PHA microspheres by using preparation system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2561101B1 (en) * 1984-03-13 1986-10-31 Paris Sud Universite PROCESS FOR THE PREPARATION OF LIPOSOMES AND LIPOSOMES THUS OBTAINED

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5330767A (en) * 1985-02-07 1994-07-19 Takeda Chemical Industries, Ltd. Sustained release microcapsule
US4954298A (en) * 1985-02-07 1990-09-04 Takeda Chemical Industries, Ltd. Method for producing microcapsule
US5652220A (en) * 1986-08-08 1997-07-29 Takeda Chemical Industries, Ltd. Encapsulation of TRH or its analog
US7048947B2 (en) 1992-12-07 2006-05-23 Takeda Pharmaceutical Company Limited Sustained-release preparation
US6528093B1 (en) 1992-12-07 2003-03-04 Takeda Chemical Industries, Ltd. Sustained-release preparation
US6572894B2 (en) 1995-11-24 2003-06-03 Actipac Biosystems Gmbh Process for the production of morphologically uniform microcapsules and microcapsules that are produced according to this process
US6294204B1 (en) 1995-11-24 2001-09-25 Inhale Therapeutic Systems, Inc. Method of producing morphologically uniform microcapsules and microcapsules produced by this method
US5945126A (en) * 1997-02-13 1999-08-31 Oakwood Laboratories L.L.C. Continuous microsphere process
US6361798B1 (en) 1998-10-28 2002-03-26 Oakwood Laboratories, L.L.C. Method and apparatus for formulating microspheres and microcapsules
US6270802B1 (en) 1998-10-28 2001-08-07 Oakwood Laboratories L.L.C. Method and apparatus for formulating microspheres and microcapsules
US6899898B2 (en) 2000-12-21 2005-05-31 Nektar Therapeutics Induced phase transition method for the production of microparticles containing hydrophobic active agents
US7252842B2 (en) 2000-12-21 2007-08-07 Alrise Biosystems Gmbh Induced phase transition method for the production of microparticles containing hydrophilic active agents
US6955823B2 (en) 2001-02-26 2005-10-18 Syngenta Crop Protection, Inc. Process for making microcapsules involving phase inversion
CN112341585A (en) * 2020-11-05 2021-02-09 青岛科技大学 Redispersible waterborne polyurethane powder and preparation method thereof
CN115212817A (en) * 2022-06-29 2022-10-21 珠海麦得发生物科技股份有限公司 Preparation system of microspheres and method for preparing PHA microspheres by using preparation system

Also Published As

Publication number Publication date
CA985968A (en) 1976-03-23
JPS4871782A (en) 1973-09-28
DE2262676A1 (en) 1973-07-05
FR2164617A1 (en) 1973-08-03
FR2164617B3 (en) 1976-10-15
BE792550A (en) 1973-06-12

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PLNP Patent lapsed through nonpayment of renewal fees