Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1988-02-26
1989-11-14
Lander, Ferris H.
Chemistry: fertilizers
Processes and products
Organic material-containing
71 33, 71 34, 71 6407, 71 6411, 71 6413, C05C 900, C05C 1100, C05G 500, C05B 700
Patent
active
048804550
ABSTRACT:
A method for the manufacture of physically prepared slow-release fertilizer by coating fertilizer particles with at least one layer of a substantially water insoluble polymer possessing a three dimensional structure. The three dimensional structure results from a prepolymerized crosslinked unsaturated oil having between 12 to 20 carbon atoms and a iodine value of at least 120, the extent of crosslinking being above 5%. Optionally, the coating layer contains micronutrients and inert materials. In a preferred embodiment, the coating consists of three layers, the first being obtained with a high viscous unsaturated oil and the subsequent two layers with a lower viscosity unsaturated oil. The method is applicable for most of the known water-soluble fertilizers.
REFERENCES:
patent: 3096171 (1963-07-01), Woerther
patent: 3158462 (1964-11-01), Wilson
patent: 3223518 (1965-12-01), Hansen
patent: 3242237 (1963-09-01), Belak et al.
patent: 3259482 (1966-07-01), Hansen
patent: 3264089 (1966-08-01), Hansen
patent: 3285223 (1966-11-01), Sahlin
patent: 3321298 (1967-05-01), Bidlack, Sr. et al.
Soybeans, Chemistry & Technology, 1978, Smith, pp. 74-75.
Haifa Chemicals Limited
Lander Ferris H.
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