Poly(ethylene adipate) Diol PEA-1000

Polyester diol PEA-1000 provides PU coatings with higher tensile strength (35–50 MPa vs 20–35 MPa for polyether-based), better oil and solvent resistance, and superior adhesion to metal substrates due to polar ester groups. However, the ester linkages hydrolyze under prolonged exposure to water, especially in acidic or alkaline conditions, leading to chain scission and embrittlement—a phenomenon accelerated above 60°C. For this reason, PEA-1000 is preferred in indoor or controlled-environment applications (synthetic leather, automotive interiors, oil-resistant floor coatings in manufacturing plants), while polyether or polycarbonate diols are chosen for outdoor or wet-immersion service.