Granular fertilizer having a plurality of coatings and the process of making

Claim 1

A FERTILIZER PRODUCT COMPRISING: (A) A CORE OF FERTILIZER MATERIAL, SAID CORE HAVING AT LEAST ONE WATER SOLUBLE PLANT NUTRIENT, (B) A PLURALITY OF COATINGS SURROUNDING SAID CORE, EACH OF SAID COATINGS BEING IN THE AMOUNT OF FROM ABOUT 0.25 TO 10% BYW EIGHT BASED ON SAID CORE, (C) AT LEAST ONE OF SAID COATINGS BEING CURED COATING OF CURABLE COPOLYMER OF DICYCLOPENTADIENE AND ESTER OF UNSATURATED ACID, AND (D) THE TOTAL COATING WEIGHT BEING SUCH AS TO DELAY AND EFFECT GRADUAL RELEASE OF SAID WTER SOLUBLE PLANT NUTRIENT.

Claim 2

A METHOD FOR PREPARING A COATED FERTILIZER GRANULE TO THEREBY DELAY AND EFFECT A GRADUAL RELEASE OF A WATER SOLUBLE PLANT NUTRIENT CONTAINED IN SAID GRANULE, THE METHOD WHICH COMPRISES: (A) HEATING GRANULAR FERTILIZER MATERIAL CONTAINING AT LEAST ONE WATER SOLUBLE PLANT NUTRIENT, (B) APPLYING A COATING OF A RAPID DRYING SOLVENT SOLUTION OF CURABLE COPOLYMER OD DICYCLOPENTADIENE AND ESTER OF UNSATURATED ACID TO SAID HEATED FERTILIZER GRANULES, (C) TUMBLING SAID FERTILIZER GRANULES AND DRYING SAID COATING AT LEAST UNTIL THE POINT OF INCIPIENT GLATION, (D) REPEATING SAID APPLICATION OF SAID COPOLYMER AND SAID TUMBLING AND DRYING AT LEAST ONE MORE TIME, AND (E) FINALLY DRYING TO COMPLETION THE LAST APPLIED COATING TO THEREBY FORM A WATER SOLUBLE COATING AROUND SAID FERTILIZER GRANULE.