Patent ID: 6987082

Claim:
A controlled release coated product in particulate form which is structured to provide a suppressed initial release period and a predetermined longevity comprising: (a) a particulate core material comprising a water soluble fertilizer composition; and (b) a single semi-permeable coating layer applied directly onto the surface of the particulate core material for controlling the release rate of the core material so that initial release of core material from the coated product is suppressed such that less than 15 weight percent of core material is released from the coated product within a 24 hour period after application of the coated product and longevity of release between the time of application and the time at which at least 75 weight percent of the core material is released from the coated product is 60 days or less at ambient temperature of about 21° C.; and (c) the single semi-permeable coating layer is formed from dicyclopentadiene (“DCPD”) polymers which comprise a cyclo oil alkyd resin based on a natural oil selected from the group consisting of soybean oil and linseed oil, the DCPD polymers providing a uniform continuous polymeric film having a water vapor transmission rate (WVTR) greater than 800 g·μm/m 2 ·day.