Controlled Release Temephos: Laboratory and Field Evaluations

  • Thomas J. Quick
  • Nathan F. Cardarelli
  • Ruben J. Ellin
  • Larry R. Sherman

Abstract

The development of controlled-release pesticides based upon the monolithic dispersion of a chemical agent in a polymer has been described in detail elsewhere.1 Temephos, 0,0,0’,0’-tetramethyl-0,0-thiodi-p-phenylene phosphorothioate (C.A. Registry #3383–96–8), was incorporated in elastomeric matrices and a diffusion-dissolution type release mechanism was established.2 Although a continuous release of the agent occurred for over three years, commercialization was not undertaken. Later it was discovered that long-term toxicant release from a plastic matrix could be achieved through a leaching process keyed to the use of a water-soluble additive whose emission led to the development of the necessary porosity in the matrix.3 The processing costs for such materials are relatively inexpensive, and consequently a number of controlled-release temephos materials are now commercially available. Unlike conventional formulations which are limited to solutions, emulsions, granules, and wettable powders, controlled-release plastic dispensers can be manufactured in any geometry conducive to the particular environment to be treated.

Keywords

Unpublished Report Wettable Powder Plastic Matrix Lease Chemical Catch Basin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1981

Authors and Affiliations

  • Thomas J. Quick
    • 1
  • Nathan F. Cardarelli
    • 1
  • Ruben J. Ellin
    • 2
  • Larry R. Sherman
    • 2
  1. 1.Environmental Management LaboratoryThe University of AkronAkronUSA
  2. 2.Department of ChemistryThe University of AkronAkronUSA

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