Title:
COMPOSITION FOR PREVENTING HARMFUL ORGANISM
Document Type and Number:
Japanese Patent JPH05201802
Kind Code:
A
Abstract:
PURPOSE: To obtain separated microcapsules each having a prescribed surface and a prescribed particle size and extremely suitable for preparing pesticidal formulations in a highly simple operation without requiring an additional dispersing agent. CONSTITUTION: The microcapsules containing a water-miscible herbicide (preferably a herbicide such as urea, sulfonyl urea, chloroacetanilide or triazine compound, an insecticide or acaricide such as thiourea, or a germicide) or an easily volatile solvent are obtained by rapidly stirring an aqueous solution of a precondensate of urea and formaldehyde in the molar ratio of 1:3.0 to 1:3.5, especially 1:2.9 to 1:3.1, in an acidified aqueous dispersion of the water- immiscible herbicide or easily volatile solvent. The solvent can be removed from the capsules by a simple method or by a conventional fluidized bed drying method, and the obtained hollow microcapsules are suitable for encapsulating a liquid or a pesticide having a low melting point.
Inventors:
RUDORUFU NASUTOKE
ANDOREASU REEONHARUTSU
ERUNSUTO NOIENSHIYUBUANDAA
ANDOREASU REEONHARUTSU
ERUNSUTO NOIENSHIYUBUANDAA
Application Number:
JP26819192A
Publication Date:
August 10, 1993
Filing Date:
September 10, 1992
Export Citation:
Assignee:
CIBA GEIGY AG
International Classes:
A01N25/28; B01J13/18; (IPC1-7): A01N25/28; B01J13/18
Attorney, Agent or Firm:
Nobuo Kaida (2 outside)