GB1190721A - Process for increasing the Impermeability of Microcapsules with Hydrophilic Polymer Walls - Google Patents

Process for increasing the Impermeability of Microcapsules with Hydrophilic Polymer Walls

Info

Publication number
GB1190721A
GB1190721A GB94869A GB94869A GB1190721A GB 1190721 A GB1190721 A GB 1190721A GB 94869 A GB94869 A GB 94869A GB 94869 A GB94869 A GB 94869A GB 1190721 A GB1190721 A GB 1190721A
Authority
GB
United Kingdom
Prior art keywords
microcapsules
component
condensation polymer
hydrophilic
walls
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
GB94869A
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 GB1190721A publication Critical patent/GB1190721A/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
    • B01J13/20—After-treatment of capsule walls, e.g. hardening
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Medicinal Preparation (AREA)
  • Fertilizers (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Color Printing (AREA)
  • Fats And Perfumes (AREA)
  • Formation And Processing Of Food Products (AREA)

Abstract

1,190,721. Treating microcapsules. NATIONAL CASH REGISTER CO. 7 Jan., 1969 [29 Jan., 1968], No. 948/69. Heading B8C. The impermeability of the hydrophilic polymeric material walls of microcapsules is improved by dispersing the capsules in a liquid in which the capsule walls swell and which includes or has added to it a first component of a condensation polymer which penetrates the interstices of the capsule walls and, optionally, complexes with the wall material. Thereafter, the second component of a condensation polymer is added which is then caused to react with the first component to form a condensation polymer in the interstices of the hydrophilic polymer wall material. Suitable first reactants are water-soluble polyhydroxy aromatics, e.g. resorcinol, catechol, phloroglucinol, hydroquinone and tannic acid (others are mentioned) and suitable second reactants are aldehydes, e.g. formaldehyde, glyoxal, furfural or glutaraldehyde, and amines. Specified hydrophilic capsule wall materials include gelatine, gum arabic, carrageenan, cationic starch, polyethylene oxide, melamine/formaldehyde resin, polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acid and maleic anhydride copolymers with ethylene, styrene and alkyl vinyl ethers.
GB94869A 1968-01-29 1969-01-07 Process for increasing the Impermeability of Microcapsules with Hydrophilic Polymer Walls Expired GB1190721A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70112468A 1968-01-29 1968-01-29

Publications (1)

Publication Number Publication Date
GB1190721A true GB1190721A (en) 1970-05-06

Family

ID=24816167

Family Applications (1)

Application Number Title Priority Date Filing Date
GB94869A Expired GB1190721A (en) 1968-01-29 1969-01-07 Process for increasing the Impermeability of Microcapsules with Hydrophilic Polymer Walls

Country Status (12)

Country Link
JP (1) JPS5030030B1 (en)
AT (1) AT304455B (en)
BE (1) BE726581A (en)
BR (1) BR6905909D0 (en)
CH (1) CH495167A (en)
DK (1) DK124994B (en)
FR (1) FR1603906A (en)
GB (1) GB1190721A (en)
IT (1) IT969020B (en)
NL (1) NL151910B (en)
NO (1) NO129034B (en)
SE (1) SE345394B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106700663B (en) * 2017-01-09 2018-08-07 中南大学 A kind of preparation method of resin coated copper bronze
CN113842375A (en) * 2021-10-13 2021-12-28 深圳市华宝生物材料科技有限公司 Microcapsule with gradient capsule wall structure and preparation method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009090747A1 (en) * 2008-01-17 2009-07-23 Tadamasa Fujimura Microencapsulated fire extinguisher, process for producing the same, and fire-extinguishing composite material
CN110183274A (en) * 2019-06-18 2019-08-30 吉林农业大学 A kind of coated fertilizer and preparation method thereof with slow control-release function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106700663B (en) * 2017-01-09 2018-08-07 中南大学 A kind of preparation method of resin coated copper bronze
CN113842375A (en) * 2021-10-13 2021-12-28 深圳市华宝生物材料科技有限公司 Microcapsule with gradient capsule wall structure and preparation method thereof
CN113842375B (en) * 2021-10-13 2023-07-25 深圳市华宝生物材料科技有限公司 Microcapsule with gradient capsule wall structure and preparation method thereof

Also Published As

Publication number Publication date
DK124994B (en) 1972-12-18
NO129034B (en) 1974-02-18
NL6901364A (en) 1969-07-31
BR6905909D0 (en) 1973-02-08
FR1603906A (en) 1971-06-14
CH495167A (en) 1970-08-31
BE726581A (en) 1969-06-16
NL151910B (en) 1977-01-17
AT304455B (en) 1972-12-15
JPS5030030B1 (en) 1975-09-27
SE345394B (en) 1972-05-29
IT969020B (en) 1974-03-30

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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)
PE20 Patent expired after termination of 20 years