GB935812A - Process for making capsules by coacervation - Google Patents

Process for making capsules by coacervation

Info

Publication number
GB935812A
GB935812A GB1978462A GB1978462A GB935812A GB 935812 A GB935812 A GB 935812A GB 1978462 A GB1978462 A GB 1978462A GB 1978462 A GB1978462 A GB 1978462A GB 935812 A GB935812 A GB 935812A
Authority
GB
United Kingdom
Prior art keywords
agitation
coacervation
temperature
walls
making capsules
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
GB1978462A
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.)
NCR Voyix Corp
National Cash Register Co
Original Assignee
NCR Corp
National Cash Register Co
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 NCR Corp, National Cash Register Co filed Critical NCR Corp
Publication of GB935812A publication Critical patent/GB935812A/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
    • B01J13/10—Complex coacervation, i.e. interaction of oppositely charged particles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Medicinal Preparation (AREA)

Abstract

A process for producing capsules having gelled polymeric material walls and nuclei of water-immiscible material includes the steps of establishing a condition of coacervation in an aqueous system containing two or more hydrophilic film-forming polymeric materials, lowering the temperature of the system with agitation, introducing nucleous particles, keeping the system at this temperature until the desired wall thickness is obtained, and dropping the temperature, still with agitation, to a point where the deposited walls gel regardless of the agitation. Five examples of the process are described. Specifications 751,600 and 872,713 are referred to.
GB1978462A 1961-09-14 1962-05-23 Process for making capsules by coacervation Expired GB935812A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13799261A 1961-09-14 1961-09-14

Publications (1)

Publication Number Publication Date
GB935812A true GB935812A (en) 1963-09-04

Family

ID=22479957

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1978462A Expired GB935812A (en) 1961-09-14 1962-05-23 Process for making capsules by coacervation

Country Status (7)

Country Link
AT (1) AT238692B (en)
BR (1) BR6241097D0 (en)
CH (1) CH406153A (en)
DE (1) DE1256195B (en)
DK (1) DK115173B (en)
GB (1) GB935812A (en)
NL (2) NL129277C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021013710A1 (en) 2019-07-19 2021-01-28 Dsm Ip Assets B.V. Encapsulation of lipophilic actives which are sensitive to acid degradation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3424115C2 (en) * 1984-06-29 1986-10-16 Papierfabrik August Koehler AG, 7602 Oberkirch Continuous coacervation process for the production of an aqueous dispersion of oil-containing microcapsules
CH669506A5 (en) * 1986-01-13 1989-03-31 Hugo Degen Oscillating and reclining furniture

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE530009A (en) * 1953-06-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021013710A1 (en) 2019-07-19 2021-01-28 Dsm Ip Assets B.V. Encapsulation of lipophilic actives which are sensitive to acid degradation

Also Published As

Publication number Publication date
NL283189A (en)
NL129277C (en)
AT238692B (en) 1965-02-25
CH406153A (en) 1966-01-31
BR6241097D0 (en) 1973-06-14
DK115173B (en) 1969-09-15
DE1256195B (en) 1967-12-14

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