Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Biocides; animal or insect repellents or attractants
Patent
1994-06-03
1996-05-14
Page, Thurman K.
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Biocides; animal or insect repellents or attractants
424405, 424418, 424493, A01N 2512
Patent
active
055165206
ABSTRACT:
A particulate controlled-release pesticide composition having a pesticide encapsulated in a polymer matrix of starch-borax-urea and method of preparation and use thereof is provided. The release rates and release duration of the pesticide compositions are controllable by adjusting the urea content in the compositions. The pesticide composition is preparable by admixing starch, pesticide, urea and water together to form a mixture and agitating the same at a temperature sufficient to gelatinize the mixture and to disperse the mixture. Borax is then added to the mixture in an amount effective to convert the mixture into a rubbery mass. The rubbery mass is then comminuted into small particles, in the presence of added starch, and dried.
REFERENCES:
patent: 4439488 (1984-03-01), Trimnell et al.
Kirk-Othmer (1985) "Concise Encyclopedia of Chemical Technology", John Wiley & Sons, publishers; New York, USA, pp. 652-656.
Felix H. Otey, et al. (1984) J. Agriculture Food Chemistry, vol. 32, pp. 1095-1098.
D. Trimnell, et al. (1982) J. Applied Polymer Science, vol. 27, pp. 3919-3928.
B. S. Shasha, et al. (1984) J. Applied Polymer Science, vol. 29, pp. 67-73.
B. S. Shasha, et al. (1989), J. Controlled Release, pp. 255-257.
B. S. Shasha, et al. (1981) J. Polymer Science, vol. 19, pp. 1891-1899.
Chen Mei-Hueih
Kao Suey-Sheng
Tzeng Ching-Chou
Yang Chien-Chun
Industrial Technology Research Institute
Levy Neil
Page Thurman K.
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