STP1460

    New Value-Added Polymeric Dispersants and Uses Thereof in Agricultural Formulations

    Published: Jan 2005


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    Abstract

    Polymeric dispersants are dispersants of choice for formulating suspension concentrates, suspoemulsions, and solid delivery systems (WP, WDG, and Tablets). We have developed a new line of polymeric dispersants, as 25 % aqueous solution, based on partially neutralized methyl vinyl ether maleic acid half esters (ethyl/butyl) copolymers (MVE-MAHE), (with trade name EASY-SPERSE®2). They were used in formulating suspension concentrates and aqueous dispersions for a host of active ingredients like herbicides, insecticides, fungicides, and other growth regulators, organic dyes, inorganic pigments, including certain water-insoluble polymers. Some of these dispersions also showed suspensibility above 80 % and rainfastness at use level concentrations.

    Other commonly used polymeric dispersants are: Lignosulfonates, Naphthalene sulfonate formaldehyde condensate (NSFC), Poly acrylates, and olefin maleic acid co-polymers. Their film forming properties and binding efficacy can be improved when used with pyrrolidone co-polymers.

    Our recent findings show synergy between vinylpyrrolidone homo/co-polymers and commonly used polymeric dispersants as above. Further, a combination of Polyvinylpyrrolidone and polymeric dispersants showed built-in rainfastness in suspension concentrates. Examples of prototype formulations and a working model explaining the synergistic role of polyvinylpyrrolidone are provided. Solid composites from Polyvinylpyrrolidone and MVE-MAHE were prepared via spray drying the liquid slurries. The solid dispersants with Polyvinylpyrrolidone incorporated will be useful in formulating solid delivery systems.

    Keywords:

    EASY-SPERSE®, MVE-MAHE, dispersants, suspension concentrates, lignosulfonates, naphthalene-sulfonate-formaldehyde-condensate (NSFC), Polyvinylpyrrolidone (PVP K — 30), synergy, chlorothalonil, carbaryl, Atrazine, metaldehyde, suspensibility, rain-fastness, solid composites (PVP/MVE-MAHE)


    Author Information:

    Narayanan, KS
    Science Fellow/Director, Senior Research Chemist, and Research Chemist, Performance Chemicals, Wayne, NJ

    Jon, DI
    Science Fellow/Director, Senior Research Chemist, and Research Chemist, Performance Chemicals, Wayne, NJ

    Patel, J
    Science Fellow/Director, Senior Research Chemist, and Research Chemist, Performance Chemicals, Wayne, NJ


    Paper ID: STP11978S

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP11978S


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