COATED GRANULAR MATERIALS

摘要

The invention relates to a coated granular substance, whereby the coating is a resin, comprising the reaction producing of at least one compound selected among cardol, cardanol or derivatives thereof or oligomers of these compound s with an isocyanate constituent, and to a method for the production thereof. Water-soluble granular substances are suited as substances to be coated. Examples of granular substances include fertilizers, plant protection agents , insecticides, pesticides, fungicides, drying agents and mixtures thereof. Th e substance coated according to the invention has advantageous properties sinc e the resin can be applied in a specified and sparing manner to the substrates due to its low tendency to adhere. In particular, coated fertilizer granules are advantageous in that, with regard to the applied amount of fertilizer, they can provide more nutrients to the plant. In addition, fertilizers can b e prepared that can provide nutrients to the plant over a longer period of tim e and continuously and they have an extract and reproducible release behavior according to the type of plant to be treated. The polyol constituents of the coating can be obtained from the renewable raw material cashew nut oil.