Patent ID: 8999031
Filing Date: 2015-04-07
Classification: A01N,C05B

Abstract:
1. A population of composite particles having an average size of greater than 80 mesh BS, the composite particles comprising a layer of a water-insoluble, dilute acid-soluble inorganic polyphosphate polymer composition overlying a discrete inner layer of a chemically distinct composition, the inorganic polyphosphate polymer composition containing 5 to 70 wt % orthophosphate and having a number average chain length of greater than 2 but less than 50 repeat units comprising phosphate when the orthophosphate content of the polyphosphate polymer is excluded from the average chain length calculation and a number average chain length of at least 1.1 but less than 50 repeat units comprising phosphate when the orthophosphate content of the polyphosphate polymer is included in the average chain length calculation, the chemically distinct composition being a plant seed or a water-soluble macronutrient fertilizer.