Chemistry: fertilizers – Processes and products – Forms or conditioning
Patent
1996-06-20
1998-09-08
Lander, Ferris
Chemistry: fertilizers
Processes and products
Forms or conditioning
71 6407, 71 6411, 71 6413, C05C 900
Patent
active
058039465
ABSTRACT:
Plant nutrients that are released in soil over a controlled period of time are comprised of plant nutrient particles containing urea and on the surface of the particles a water insoluble, biodegradable, interpenetrating polymer network comprised of a biuret, a urethane and tung oil; more specifically, an interpenetrating network comprised of the reaction product of the urea and an isocynate reactive with urea, the reaction product of the isocyanate and an alcohol reactive with isocyanate to form a urethane, and the reaction product of the urethane and tung oil. A method of making the controlled release plant nutrient conveniently and economically is also disclosed.
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Petcavich Robert J.
Yang Xiaoming
Lander Ferris
Planet Polymer Technologies, Inc.
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