GB1202341A - Process for treating microcapsules with polymer shells - Google Patents

Process for treating microcapsules with polymer shells

Info

Publication number
GB1202341A
GB1202341A GB782369A GB782369A GB1202341A GB 1202341 A GB1202341 A GB 1202341A GB 782369 A GB782369 A GB 782369A GB 782369 A GB782369 A GB 782369A GB 1202341 A GB1202341 A GB 1202341A
Authority
GB
United Kingdom
Prior art keywords
microcapsules
walls
treating
maleic anhydride
process
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
GB782369A
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 Corp
Original Assignee
NCR Corp
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 US71072568A priority Critical
Application filed by NCR Corp filed Critical NCR Corp
Publication of GB1202341A publication Critical patent/GB1202341A/en
Application status is Expired legal-status Critical

Links

Classifications

    • 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
    • B01J13/20After-treatment of capsule walls, e.g. hardening
    • B01J13/206Hardening; drying
    • 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

Abstract

1,202,341. Treating microcapsules. NATIONAL CASH REGISTER CO. 13 Feb., 1969 [6 March, 1968], No. 7823/69. Heading B8C. Microcapsules having walls of hydrophilic polymeric material which have been formed by concervation are dispersed in an agitated aqueous solution of at least one sulphate, citrate, tartrate, acetate or chloride of ammonium and/or an alkali metal whereby the capsules walls are shrunk to make drying easier. The microcapsules may also be treated with a cross-linking agent to harden and insolubilize the walls if desired. As capsule wall materials, reference is made to gelatin, gum arabic, carrageenan, hydrolysed poly (ethylene co-maleic anhydride) and hydrolysed poly (vinyl-methyl ether co-maleic anhydride). The capsule cores may be any solid or liquid which is water-insoluble.
GB782369A 1968-03-06 1969-02-13 Process for treating microcapsules with polymer shells Expired GB1202341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US71072568A true 1968-03-06 1968-03-06

Publications (1)

Publication Number Publication Date
GB1202341A true GB1202341A (en) 1970-08-12

Family

ID=24855252

Family Applications (1)

Application Number Title Priority Date Filing Date
GB782369A Expired GB1202341A (en) 1968-03-06 1969-02-13 Process for treating microcapsules with polymer shells

Country Status (5)

Country Link
BR (1) BR6906860D0 (en)
CH (1) CH515069A (en)
DE (1) DE1910581B1 (en)
FR (1) FR2003300A1 (en)
GB (1) GB1202341A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056219A1 (en) * 1981-01-14 1982-07-21 KemaNord AB A process for drying and expanding microspheres

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1122495B (en) * 1953-06-30 1962-01-25 Ncr Co A method for producing microscopic, oil-containing capsules
US3043782A (en) * 1958-12-22 1962-07-10 Upjohn Co Process for preparing a more impermeable coating by liquid-liquid phase separation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056219A1 (en) * 1981-01-14 1982-07-21 KemaNord AB A process for drying and expanding microspheres

Also Published As

Publication number Publication date
FR2003300A1 (en) 1969-11-07
BR6906860D0 (en) 1973-04-19
DE1910581B1 (en) 1970-09-16
CH515069A (en) 1971-11-15

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees