GB1521938A - Parasite control compositions - Google Patents

Parasite control compositions

Info

Publication number
GB1521938A
GB1521938A GB34984/76A GB3498476A GB1521938A GB 1521938 A GB1521938 A GB 1521938A GB 34984/76 A GB34984/76 A GB 34984/76A GB 3498476 A GB3498476 A GB 3498476A GB 1521938 A GB1521938 A GB 1521938A
Authority
GB
United Kingdom
Prior art keywords
styrene
component
maleic
bromine
aug
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
GB34984/76A
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of GB1521938A publication Critical patent/GB1521938A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • A61K9/1605—Excipients; Inactive ingredients
    • A61K9/1629—Organic macromolecular compounds
    • A61K9/1635—Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/66—Phosphorus compounds
    • 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
    • A61K9/5005—Wall or coating material
    • A61K9/5021—Organic macromolecular compounds
    • A61K9/5026—Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates

Abstract

1521938 Controlled release antiparasitic preparations SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 23 Aug 1976 [25 Aug 1975] 34984/76 Heading A5B A controlled release antiparasitic composition comprises (a) a compound of formula: wherein the two R radicals are the same or different and each is C 1-10 alkyl, X is oxygen or sulphur, Y is hydrogen, chlorine or bromine and hal is chlorine or bromine, (b) a homo-carbon-carbon addition polymer of molecular weight 5000 or more and (c) a styrene/maleic anhydride or styrene/maleic acid copolymer, of molecular weight from 2,000-800,000, containing 0-20% of maleic ester residues and having 1 to 4 styrene residues per maleic residue the composition comprising particles of component (b) having a porosity of 0.15 to 0.70 cc/g and a particle size of 30-200 mesh (USS) coated with component (c), component (a) being partitioned between core and coating, the weight ratio (a) : (b)+(c) being not more than 1:5 and the weight ratio (b) : (c) being from 1:4 to 1: 1.5. Preferred organophosphorus compounds are dimethyl 2, 2-dichlorovinyl phosphate and methyl octyl 2, 2-dichlorovinyl phosphate. The homopolymer (b) may be polyvinyl chloride.
GB34984/76A 1975-08-25 1976-08-23 Parasite control compositions Expired GB1521938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60739775A 1975-08-25 1975-08-25

Publications (1)

Publication Number Publication Date
GB1521938A true GB1521938A (en) 1978-08-16

Family

ID=24432093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34984/76A Expired GB1521938A (en) 1975-08-25 1976-08-23 Parasite control compositions

Country Status (9)

Country Link
AU (1) AU503471B2 (en)
BE (1) BE845365A (en)
DE (1) DE2637863A1 (en)
DK (1) DK379076A (en)
FR (1) FR2321895A1 (en)
GB (1) GB1521938A (en)
NL (1) NL7609333A (en)
SE (1) SE7609307L (en)
ZA (1) ZA765043B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2216411A (en) * 1988-03-05 1989-10-11 Schering Agrochemicals Ltd Sustained-release trypanocide compositions

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1249823B (en) * 1964-01-15 1967-09-14
US3536791A (en) * 1967-07-21 1970-10-27 Shell Oil Co Methyl (c4-c12-alkyl) beta,beta-dichlorovinyl phosphates
US3507956A (en) * 1967-12-27 1970-04-21 Shell Oil Co Treatment of young animals with dialkyl beta-chlorovinyl phosphate
DE1767425B2 (en) * 1968-05-09 1973-05-17 R P Scherer GmbH, 6930 Eberbach PROCESS FOR THE MANUFACTURING OF GELATIN CAPSULES RESISTANT TO MAGIC JUICE
FR2119860A1 (en) * 1970-12-29 1972-08-11 Aries Robert Organophosphorus pesticides - stabilized by opt substd hydroxyanthraquinones
FR2123142A3 (en) * 1971-01-25 1972-09-08 Aries Robert Pesticidal organophosphorus compsns - stabilized by 2-vinyl imidazolines and 2-vinylpyrimidines
US3937825A (en) * 1973-09-21 1976-02-10 American Cyanamid Company Anthelmintic composition and method of use

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2216411A (en) * 1988-03-05 1989-10-11 Schering Agrochemicals Ltd Sustained-release trypanocide compositions

Also Published As

Publication number Publication date
ZA765043B (en) 1977-08-31
FR2321895B1 (en) 1978-12-22
AU1705476A (en) 1978-03-02
DE2637863A1 (en) 1977-03-10
SE7609307L (en) 1977-02-26
DK379076A (en) 1977-02-26
AU503471B2 (en) 1979-09-06
DE2637863C2 (en) 1988-07-21
FR2321895A1 (en) 1977-03-25
NL7609333A (en) 1977-03-01
BE845365A (en) 1977-02-21

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee