Phenol-Resorcinol-Formaldehyde (PRF) Adhesives
PRF adhesives are classified as thermosetting polymers and are produced by a condensation polymerization between formaldehyde, phenol and resorcinol.
PRF adhesives are cold-setting with very high weather and water resistance as well as heat resistance to be used in products for exterior, humid and interior climates. PRF adhesives can also be used in hot bonding and radio frequency curing equipment to speed up the curing process.
PRF adhesives are mainly used in the production of load-bearing timber structures where a maximum of weather resistance is required. With a proven track record such as this, these adhesives have developed a long and successful history of use in plywood laminating, boat building and wood aircraft construction. Unlike the epoxy family of adhesives, PRF’s are completely UV-resistant, outlasting epoxies in high-weather-exposure applications almost ten to one.
Representative Commercial Products:
PRF adhesives are represented by such products as;
- Weldwood Resorcinol (DAP Products)
- Aerodux-500 (now called Prefere’)
- G-1131 (also called Penacolite or Cascophen)