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February 9, 2026Environmental Science Advances0 citationsOpen Access

Performance of Hydrophilic Polyols in the Formation of Polyurethane Based Controlled Release Fertilizer Coatings

DSDavid Keith SteelmanAKAlex J. KosanovichOJOmar Jalife

Key Points

  • The aim is to evaluate the effectiveness of hydrophilic polyols in making polyurethane-based controlled-release fertilizer coatings.
  • Developed coatings using a layer-by-layer polyurethane system.
  • Utilized polyether polyol blends and polymeric methylene diphenyldiisocyanate.
  • Incorporated a wax additive to enhance coating properties.
  • Coatings demonstrated effective controlled release of granular urea.
  • Layer-by-layer system improved fertilizer efficiency compared to traditional coatings.

Abstract

A series of controlled-release coatings were developed for granular urea (46-0-0) using a layer-by-layer polyurethane system composed of polyether polyol blends, polymeric methylene diphenyldiisocyanate (pMDI), and a wax additive. A...

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Cite This Study

Steelman et al. (2026) studied this question.

synapsesocial.com/papers/698979a6f0ec2af6756e76f5https://doi.org/10.1039/d5va00459d
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Also Consider

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  1. 1Lignin-Modified Petrochemical-Source Polyester Polyurethane Enhances Nutrient Release Performance of Coated Urea2025
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  3. 3Effect of Hydroxyl Value and Compatibilizing Additives on Green Polyurethane Composite Films Based‐On Rubber Seed Oil for Slow‐Release Fertilizer Applications2026
  4. 4All-Natural Plant-Derived Polyurethane as a Substitute of a Petroleum-Based Polymer Coating Material2024 · 12 citations
  5. 5High bio-content polyurethane coated controlled-release fertilizer with metal coordination layer for prolonged nutrient release and enhanced degradability2025