ES345751A1 - A method of preparing minute polymeric capsules - Google Patents

A method of preparing minute polymeric capsules

Info

Publication number
ES345751A1
ES345751A1 ES345751A ES345751A ES345751A1 ES 345751 A1 ES345751 A1 ES 345751A1 ES 345751 A ES345751 A ES 345751A ES 345751 A ES345751 A ES 345751A ES 345751 A1 ES345751 A1 ES 345751A1
Authority
ES
Spain
Prior art keywords
poly
maleic anhydride
hydrogen bonding
polymer
acid
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
ES345751A
Other languages
Spanish (es)
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 ES345751A1 publication Critical patent/ES345751A1/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
    • 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

Landscapes

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

Abstract

Microcapsules, each consisting of a wall of polymeric material enclosing a solid or liquid core particle, are made by dispersing the core material in a manufacturing liquid from which there is caused to separate a polymer-rich phase comprising a polymeric complex composed of two kinds of polymeric material joined by hydrogen bonding which coats the dispersed particles to form microcapsules in the usual way. Both types of polymer may be present in the initial manufacturing liquid, from which they are induced to separate by changing conditions, e.g. the pH may be changed or a solution of one type may be added to the system already containing the other under conditions allowing immediate formation of the complex and phaseseparation thereof. The polymer pair should comprise at least one "Hydrogen bonding acid" e.g. polyacrylic acid, poly(methacrylic acid), poly(vinyl alcohol), poly(vinyl pyrrolidone), methyl cellulose, carboxymethyl cellulose, poly- (styrene co - maleic anhydride), poly(vinylmethylether co-maleic anhydride) or poly(ethylene co-maleic anhydride) and at least one "Hydrogen bonding base" e.g. poly(ethylene oxide), poly(ethylene oxide co-propylene oxide), poly(propylene oxide), poly(vinyl pyrrolidone), poly(vinyl alcohol), poly(ethylene glycol), poly- (acrylic acid) or poly(methacrylic acid) (the designations "acidic" and "basic" being relative not absolute). The capsules may be dried in the usual way. Examples relate to the encap. sulation of stainless steel particles, ammonium dichromate and lemon oil.
ES345751A 1966-10-10 1967-10-04 A method of preparing minute polymeric capsules Expired ES345751A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US58531466A 1966-10-10 1966-10-10

Publications (1)

Publication Number Publication Date
ES345751A1 true ES345751A1 (en) 1968-11-16

Family

ID=24340909

Family Applications (1)

Application Number Title Priority Date Filing Date
ES345751A Expired ES345751A1 (en) 1966-10-10 1967-10-04 A method of preparing minute polymeric capsules

Country Status (8)

Country Link
AT (1) AT286239B (en)
BE (1) BE704833A (en)
CH (1) CH486270A (en)
DE (1) DE1619798A1 (en)
ES (1) ES345751A1 (en)
GB (1) GB1138570A (en)
NL (1) NL6713637A (en)
SE (1) SE313040B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214514B (en) * 1988-01-29 1992-01-08 Ici Plc Composite particle dispersions
CN110876378A (en) * 2019-12-11 2020-03-13 利民化学有限责任公司 Intelligent microcapsule suspending agent and preparation method thereof

Also Published As

Publication number Publication date
GB1138570A (en) 1969-01-01
DE1619798A1 (en) 1970-10-29
SE313040B (en) 1969-08-04
NL6713637A (en) 1968-04-11
AT286239B (en) 1970-11-25
CH486270A (en) 1970-02-28
BE704833A (en) 1968-02-15

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