GB1292408A - Minute capsules and method of preparation thereof - Google Patents

Minute capsules and method of preparation thereof

Info

Publication number
GB1292408A
GB1292408A GB00393/71A GB1039371A GB1292408A GB 1292408 A GB1292408 A GB 1292408A GB 00393/71 A GB00393/71 A GB 00393/71A GB 1039371 A GB1039371 A GB 1039371A GB 1292408 A GB1292408 A GB 1292408A
Authority
GB
United Kingdom
Prior art keywords
microcapsules
polyhydric alcohol
aqueous solution
water
particles
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
GB00393/71A
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 GB1292408A publication Critical patent/GB1292408A/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
    • 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
    • B01J13/14—Polymerisation; cross-linking
    • B01J13/18—In situ polymerisation with all reactants being present in the same phase

Landscapes

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

Abstract

1292408 Microcapsules NATIONAL CASH REGISTER CO 21 April 1971 [27 May 1970] 10393/71 Heading B8C Microcapsules are prepared by dispersing a water-insoluble core material in an aqueous solution of a water-soluble silicic acid or silicate capable of forming an aqueous solution or sol and adding a polyhydric alcohol thereto with agitation. A liquid phase composed of a complex of the silicic material and the polyhydric alcohol is formed and encapsulates the particles. The capsule walls may be hardened by addition of an inorganic salt which will react with the wall material to form a solid silicate salt, e.g. Al 2 (SO 4 ) 3 , MgSO 4 , CaCl 2 , MgBr 2 or iron chloride. The preferred polyhydric alcohol is polyethylene glycol of M.W. 400 to 6000. Glycols and glycerols may also be used. Specific examples relate to the encapsulation of aluminium particles, a hydrocarbon oil and microcapsules of butyl acetate in a gelatine mantle.
GB00393/71A 1970-05-27 1971-04-21 Minute capsules and method of preparation thereof Expired GB1292408A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4111470A 1970-05-27 1970-05-27

Publications (1)

Publication Number Publication Date
GB1292408A true GB1292408A (en) 1972-10-11

Family

ID=21914822

Family Applications (1)

Application Number Title Priority Date Filing Date
GB00393/71A Expired GB1292408A (en) 1970-05-27 1971-04-21 Minute capsules and method of preparation thereof

Country Status (7)

Country Link
BE (1) BE767697A (en)
CA (1) CA918007A (en)
CH (1) CH552408A (en)
DE (1) DE2125652C3 (en)
FR (1) FR2095638A5 (en)
GB (1) GB1292408A (en)
ZA (1) ZA711880B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852076A (en) * 1972-02-22 1974-12-03 Ryan J Aqueous method of microencapsulation and capsules

Also Published As

Publication number Publication date
CH552408A (en) 1974-08-15
CA918007A (en) 1973-01-02
DE2125652C3 (en) 1980-01-24
FR2095638A5 (en) 1972-02-11
DE2125652A1 (en) 1971-12-09
ZA711880B (en) 1971-12-29
BE767697A (en) 1971-10-18
DE2125652B2 (en) 1978-12-07

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee