THALER, WARREN A.,MANALASTAS, PACIFICO V.,DRAKE, EVELYN N.,LUNDBERG, ROBERT D.
申请号：
US19870131583
公开号：
US4979980(A)
申请日:
1987.12.11
申请国别(地区):
美国
年份:
1990
代理人:
摘要：
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 wherein R1 or R2 is an alkyl, cycloalkyl or aryl group; R3, R4 and R5 are a hydrogen or alkyl, cycloalkyl, or aryl groups; m equal 1 to 20 and n equals 1 to 500.
