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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 JalifeDow Chemical (India)

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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  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