STP1537

    Approaches Towards Design of Green Matrices to Formulate Agricultural and Bio-active Materials and Provide Improved Efficacy

    31th Symposium on Pesticide Formulations and Delivery Systems: Innovative Green Chemistries for the 21st Century on 12 October 2010 in San Antonio, TX.

    Published: Dec 2011


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    Abstract

    Agricultural formulations containing hydrophobic active ingredients and spray solutions are used in aqueous medium. Typical concentrates are formulated as (a) solvent-based emulsifiable concentrates, (b) water-based suspension concentrates, (c) oil-based suspensions, and (d) solid forms like water-dispersible granules form the bulk of agricultural formulations. Efficacy of the active ingredients depends upon the particle/droplet size distribution in the spray solution and it is advantageous to have submicron size distribution with additional protection against wash off. Global awareness and strong regulatory initiative are the driving force for the design of green and environmentally friendly delivery matrices. Following approaches are viable solutions to address the green delivery targets. This paper will address typical examples of solvent pairs to formulate solvent-based formulations; stable micro-emulsion concentrates using all EPA approved (exemption from tolerance) components usable for food-crops. Water-based suspension concentrates with excellent suspensibility were developed by using newly developed polymer composites. Proprietary derivatized vegetable oils were used as self-emulsifying oils to formulate stable concentrates with good emulsification on dilution in water, without having to use conventional emulsifiers. Additional benefit with such compositions would be sustained release capability. Solventless zero volatile organic compounds (VOC) compositions were also developed for end-use applications with acceptable bio-activity by using proprietary polymer surfactant pairs.

    Keywords:

    solvent-based formulations, emulsifiable concentrates (ECs), micro-emulsion matrices, solvent pairs, self-emulsifying oil, renewable resources, polymer composites, Easy-Sperse® P-20, suspension, concentrates (SCs), water-dispersible granule (WDG), suspensibility, polymer–surfactant interactions, zero volatile organic component (VOC) aqueous formulations and solids


    Author Information:

    Narayanan, Kolazi S.
    ISP Research and Development, International Specialty Products, Wayne, NJ

    Patel, Jayanti
    ISP Research and Development, International Specialty Products, Wayne, NJ

    Jon, Domingo
    ISP Research and Development, International Specialty Products, Wayne, NJ

    Qu, Xin
    ISP Shanghai Technical Centre-R&D, Shanghai,

    Zhang, Tom
    ISP Shanghai Technical Centre-R&D, Shanghai,


    Paper ID: STP153720120001

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP153720120001


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