GB1202341A - Process for treating microcapsules with polymer shells - Google Patents
Process for treating microcapsules with polymer shellsInfo
- 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
- maleic anhydride
- treating
- hydrolysed poly
- 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
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
- B01J13/20—After-treatment of capsule walls, e.g. hardening
- B01J13/206—Hardening; drying
-
- 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
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.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US71072568A | 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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1122495B (en) * | 1953-06-30 | 1962-01-25 | Ncr Co | Process for the production of microscopic capsules containing oil |
US3043782A (en) * | 1958-12-22 | 1962-07-10 | Upjohn Co | Process for preparing a more impermeable coating by liquid-liquid phase separation |
-
1969
- 1969-02-13 GB GB782369A patent/GB1202341A/en not_active Expired
- 1969-03-01 DE DE19691910581 patent/DE1910581B1/en active Pending
- 1969-03-05 CH CH344069A patent/CH515069A/en not_active IP Right Cessation
- 1969-03-05 FR FR6905953A patent/FR2003300A1/fr not_active Withdrawn
- 1969-03-05 BR BR20686069A patent/BR6906860D0/en unknown
Cited By (1)
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 |
---|---|
DE1910581B1 (en) | 1970-09-16 |
BR6906860D0 (en) | 1973-04-19 |
CH515069A (en) | 1971-11-15 |
FR2003300A1 (en) | 1969-11-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |