Controlled release fertilizers utilizing an epoxy polymer primer coat and methods of production

摘要

Controlled release, particulate fertilizer products having a water soluble fertilizer central mass encased in a plurality of water insoluble, abrasion resistant coatings plus coating compositions and methods for the production of such products are disclosed. At least one essential inner coating is an epoxide reaction product ofP PA. at least one epoxide resin containing at least about 2 epoxide moieties per molecule, andPPB. at least one amine curing agent containing at least about two N--H moieties/molecule.