Class of polymer resins made from phenol and formaldehyde, and cured by air drying or heat baking.

  • Note: 1 to entry: Chemical resistance can be further increased via heat and catalyst treatment.

Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards

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