poly-4-hydroxybenzoate

chemical compound

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July 23, 2026

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Poly-4-hydroxybenzoate, also known as poly(p-hydroxybenzoate), is a type of high-performance engineering plastic belonging to the polyarylate family. These plastics are recognized for their strength, toughness, and resistance to chemicals and high temperatures.1

Polyarylates are aromatic polyesters, meaning their molecular chains are linked by ester groups and contain bulky aromatic rings. These rings stiffen the polymer chain, contributing to its high melting point. Poly-4-hydroxybenzoate is highly crystalline and does not soften below approximately 315 °C (600 °F). Blends of this resin with polytetrafluoroethylene are used in applications like self-lubricating bearings and seals.1

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polyarylate
Poly-4-hydroxybenzoate, a highly crystalline polymer consisting solely of aromatic rings linked by ester groups, does not soften below approximately 315 °C (600 °F). Blends of the latter resin with polytetrafluoroethylene, sold under the Ekonol trademark, are employed as self-lubricating bearings, O-ring seals, and pump vanes.
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Poly-4-hydroxybenzoate, a highly crystalline polymer consisting solely of aromatic rings linked by ester groups, does not soften below approximately 315 °C (600 °F). Blends of the latter resin with polytetrafluoroethylene, sold under the Ekonol trademark, are employed as self-lubricating bearings, O-ring seals, and pump vanes.
Read More