WG and WP Formulations of Captan with Polymeric Surfactants

    Volume 8, Issue 3 (March 2011)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 29 March 2011

    Page Count: 15


    Hu, Qiang
    Research Chemist, Croda, Inc., New Castle, DE

    (Received 3 November 2010; accepted 28 February 2011)

    Abstract

    Water-dispersible Granules (WGs) and Wettable Powder (WP) are two important types of agrochemical formulations. The combined shares of WG and WP formulations by volume were 30 % among all the agrochemical formulation types in 2007. WG formulation is continuously increasing in share as a safer and greener formulation type. Both formulation compositions and formulation process affect the performance of WG and WP. This research demonstrated a concise and systematic approach to develop WG via low pressure extrusion process and WP blade-mixer blending process in the laboratory. Specifically, Captan technical as a model active ingredient was formulated together with polymeric dispersants, alkyl sodium sulfosuccinate wetting agents, and Kaolin clay diluents under controlled process conditions. The formulated samples were investigated in suspension stability, disintegration behavior, particle size, and granule morphology, and their composition-structure-performance relationships were discussed.


    Paper ID: JAI103545

    DOI: 10.1520/JAI103545

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    Author
    Title WG and WP Formulations of Captan with Polymeric Surfactants
    Symposium 31th Symposium on Pesticide Formulations and Delivery Systems: Innovative Green Chemistries for the 21st Century, 2010-10-12
    Committee E35