STP1183

    Grafted Polymers and Copolymers of Vinyl Pyrrolidone for Improved Water Dispersible Granules

    Published: Jan 1993


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    Abstract

    Polyvinylpyrrolidone (PVP), especially PVP K-30 (Agrimer2 30), has been widely used in many different delivery systems. It can act as a solubilizing agent by complexing with many active ingredients, dispersing and suspending agent, viscosity enhancer, granule and tablet binder, and coating agent. In this paper, we describe its use and performance, along with vinylpyrrolidone-vinylacetate copolymer (Agrimer VA 6) and PVP grafted with butene (Agrimer AL 10), as a binder for water dispersible granules. The PVP-type polymers, at the 3% level, were used in a prototype atrazine 90DF formulation. The resulting granules, prepared by pan granulation, were found to have improved performance compared to granules made with conventional lignosulfonate binder. Less moisture was required to produce good granules, and granule conversion was increased. Slight to moderate improvements in dispersion properties were also obtained with Agrimer polymers, and a marked reduction in foam generation was obtained with Agrimer AL 10. The results also indicate possible synergistic effects for a mixture of Agrimer AL 10 and Agrimer VA 6 when used in combination.

    Keywords:

    atrazine, polyvinylpyrrolidone, copolymer, granulation, binder, moisture, suspension, friability


    Author Information:

    Fu, E
    Agricultural applications, Research and Development, International Specialty Products Inc., Wayne, NJ

    Chaudhuri, RK
    Agricultural applications, Research and Development, International Specialty Products Inc., Wayne, NJ

    Narayanan, KS
    Agricultural applications, Research and Development, International Specialty Products Inc., Wayne, NJ


    Paper ID: STP25149S

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP25149S


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