GB929227A - Encapsulated emulsions and processes for their preparation - Google Patents

Encapsulated emulsions and processes for their preparation

Info

Publication number
GB929227A
GB929227A GB40226/59A GB4022659A GB929227A GB 929227 A GB929227 A GB 929227A GB 40226/59 A GB40226/59 A GB 40226/59A GB 4022659 A GB4022659 A GB 4022659A GB 929227 A GB929227 A GB 929227A
Authority
GB
United Kingdom
Prior art keywords
coacervating
styrene
polymer
emulsion
maleic 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
GB40226/59A
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.)
Pharmacia and Upjohn Co
Original Assignee
Upjohn 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 Upjohn Co filed Critical Upjohn Co
Publication of GB929227A publication Critical patent/GB929227A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/26—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests in coated particulate form
    • A01N25/28—Microcapsules or nanocapsules
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
    • A61K9/5089—Processes
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Agronomy & Crop Science (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Epidemiology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Animal Behavior & Ethology (AREA)
  • Dispersion Chemistry (AREA)
  • Public Health (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Medicinal Chemistry (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Toxicology (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

Particles of a (primary) oil-in-hydrophilic liquid emulsion containing a thickening agent in the hydrophilic liquid phase are encapsulated by forming a secondary emulsion comprising the said primary emulsion dispersed in a coacervating solution comprising a coacervating agent and an aqueous dispersion of a linear macromolecular synthetic polymer and allowing a coacervate to form about the particles of primary emulsion and which may subsequently be hardened, plasticized and/or dried. Suitable thickening agents are: acacia, tragacanth, methyl cellulose, carboxymethyl cellulose, magnesium aluminium silicate, polyglycols, glycerine and syrups. Suitable polymers are those whose structure comprises both lipophilic units and hydrophilic units, e.g. hydrolysed styrenemaleic anhydride copolymers and modifications thereof, those preferred being of the general formula [-R-R1-]n wherein R represents lipophilic units of which more than 70% are styrene residues and R1 represents lipophilic units of which more than 50% are maleic acid residues. Other polymers mentioned are: styrene-maleic acid amide and methylvinyl ethermaleic acid copolymers, sulphonated polystyrenes and carbohydrate acetate phthalates. The coacervating agent may be an electrolyte or a water-soluble liquid in which the coacervating polymer is less soluble than in water. Solubilizing agents, particularly polysaccharides, e.g. alginates, pectins, methyl cellulose and Irish moss derivates may be included in the polymer solutions. Either or both phases of the primary emulsion may contain dissolved or dispersed materials which render the capsules of the invention useful as fertilizers, plant growth regulants, bactericides, pesticides, food additives, medicines and cosmetics. Specific examples relate to: (a) mineral oil-in-aqueous urea solution in styrene-maleic acid copolymer and (b) corn oil-in-aqueous rotenone dispersion in the same polymer. Specification 751,600 is referred to.
GB40226/59A 1958-12-22 1959-11-26 Encapsulated emulsions and processes for their preparation Expired GB929227A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78192658A 1958-12-22 1958-12-22

Publications (1)

Publication Number Publication Date
GB929227A true GB929227A (en) 1963-06-19

Family

ID=25124400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40226/59A Expired GB929227A (en) 1958-12-22 1959-11-26 Encapsulated emulsions and processes for their preparation

Country Status (5)

Country Link
BR (1) BR5915727D0 (en)
CH (1) CH393274A (en)
DE (1) DE1248016B (en)
FR (1) FR1280583A (en)
GB (1) GB929227A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136386A (en) * 1983-03-14 1984-09-19 Fuji Photo Film Co Ltd Preparation of encapsulated electrostatographic toner material
US4935245A (en) * 1987-01-24 1990-06-19 Basf Aktiengesellschaft Pulverulent, water-dispersible preparation of a sparingly water-soluble pharmaceutical active compound and its preparation
US9364422B2 (en) 2013-12-19 2016-06-14 Avon Products, Inc Styrene maleic anhydride polymers in cosmetics and personal care products
CN114015271A (en) * 2021-11-25 2022-02-08 亚士创能科技(上海)股份有限公司 Water-in-water multicolor paint capable of scraping in batches, preparation method, construction method and application

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL128863C (en) * 1962-02-20
DE3237814A1 (en) * 1982-10-12 1984-04-12 Warner-Lambert Co., 07950 Morris Plains, N.J. WATER-FREE EMULSIONS AND USE THEREOF
DE19840583A1 (en) 1998-09-05 2000-03-09 Bayer Ag Microcapsule formulations
US6653256B1 (en) 1999-08-24 2003-11-25 Bayer Aktiengesellschaft Microcapsule formulations

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL95044C (en) * 1953-06-30
US2800457A (en) * 1953-06-30 1957-07-23 Ncr Co Oil-containing microscopic capsules and method of making them

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136386A (en) * 1983-03-14 1984-09-19 Fuji Photo Film Co Ltd Preparation of encapsulated electrostatographic toner material
US4935245A (en) * 1987-01-24 1990-06-19 Basf Aktiengesellschaft Pulverulent, water-dispersible preparation of a sparingly water-soluble pharmaceutical active compound and its preparation
US9364422B2 (en) 2013-12-19 2016-06-14 Avon Products, Inc Styrene maleic anhydride polymers in cosmetics and personal care products
CN114015271A (en) * 2021-11-25 2022-02-08 亚士创能科技(上海)股份有限公司 Water-in-water multicolor paint capable of scraping in batches, preparation method, construction method and application

Also Published As

Publication number Publication date
DE1248016B (en) 1967-08-24
BR5915727D0 (en) 1973-05-29
FR1280583A (en) 1962-01-08
CH393274A (en) 1965-06-15

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