Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1987-08-06
1989-02-14
Lander, Ferris H.
Chemistry: fertilizers
Processes and products
Organic material-containing
71 29, 71 30, 71 6411, 71 6412, C05C 900, C05C 1300
Patent
active
048044032
ABSTRACT:
An attrition-resistant, controlled release fertilizer comprising a water-soluble central mass containing nucleophilic reactive functional groups surrounded and chemically bonded to a base coating formed by reacting a molecular excess of a coupling agent with the nucleophilic groups of the central particles, and a water-insoluble layer, surrounding and chemically bonded with the base coating, formed by the reaction and polymerization of the excess functional groups of the coupling agent used in forming the base coating is described. A preparation method is provided.
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CA 84:29810, J. Urea Fertilizer Coating, Hiroshi Takashima, Fusao Yamada; Japanese Kokai 75,129,362, Oct. 13, 1975.
CA 87:52162, U. Slow-Releasing Coated Granular Fertilizer, Toshiharu Yamazaki, Masao Eguchi, Yataka Takada, Hachiro Tadenuma, Kuniharu Nakajima, Sadashi Yamashita, Japanese Kokai 77,38,361, Mar. 24, 1977.
Breiner A. W.
Lander Ferris H.
Melamine Chemicals, Inc.
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