Chemistry: fertilizers – Processes and products – Forms or conditioning
Patent
1987-12-11
1990-12-25
Lander, Ferris H.
Chemistry: fertilizers
Processes and products
Forms or conditioning
71 6407, 71 28, 71 27, C05G 300
Patent
active
049799800
ABSTRACT:
An encapsulated water soluble fertilizer which comprises a polymeric film of about 2 to about 100 micrometers coated on a surface of said fertilizer, said polymeric film comprising a sulfonated polymer having about 10 to about 200 meq of sulfonate group per 100 grams of said sulfonated polymer, said sulfonate groups being neutralized with a polycaprolactone polymer being characterized by the formula ##STR1## wherein R.sub.1 or R.sub.2 is an alkyl, cycloalkyl or aryl group; R.sub.3, R.sub.4 and R.sub.5 are a hydrogen or alkyl, cycloalkyl, or aryl groups; m equal 1 to 20 and n equals 1 to 500.
REFERENCES:
patent: 4741956 (1988-05-01), Thaler et al.
Drake Evelyn N.
Lundberg Robert D.
Manalastas Pacifico V.
Thaler Warren A.
Exxon Research & Engineering Company
Lander Ferris H.
Nanfeldt Richard E.
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