Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Preparation and Properties of Waterborne Polyurethane-Urea/Poly(vinyl alcohol) Blends for High Water Vapor Permeable Coating Materials

  • Yun, Jong-Kook (Korea Institute of Footwear & Leather Technology) ;
  • Yoo, Hye-Jin (Division of Chemical Engineering, Pusan National University) ;
  • Kim, Han-Do (Division of Chemical Engineering, Pusan National University)
  • Published : 2007.02.28
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Abstract

High water vapor permeable coating materials were prepared by blending aqueous poly(vinyl alcohol) (PVA) solution with waterborne polyurethane-urea (WBPU) dispersions synthesized by prepolymer mixing process. Stable WBPU/PVA dispersions were achieved at PVA content below 30 wt%. As the water soluble polymer PVA content increased, the number and density of total micro-pores (tunnel-like/isolated micro-pores) formed after the dissolution of PVA in water increased, and the water vapor permeability of coated Nylon fabric also increased significantly. Using WBPU/water soluble polymer PVA blends as a coating material and then dissolving PVA in water was confirmed to be an effective method to obtain prominent breathable fabrics.

Keywords

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