Phenol formaldehyde resin

Phenol formaldehyde resin (CAS 9003-35-4), commonly known as phenolic resin or PF resin, is a synthetic thermosetting polymer produced by reacting phenol with formaldehyde.

Where is Phenol formaldehyde resin used?

• Wood panel and construction: bonds plywood, OSB, and engineered lumber for moisture-resistant joints
• Automotive and aerospace: primary binder in brake friction materials
• Foundry: shell mold binder for casting metal parts
• Coatings and laminates: crosslinks to produce hard, chemically resistant finishes
• It functions as a binder, adhesive matrix, and curing agent.
• Binder for mineral wool insulation.
• Reinforcing resin for rubber.
• A crosslinking agent, most often hexamethylenetetramine, must be added to obtain a crosslinked thermosetting resin under heat.

Formulation notes

• Poor resistance to strong bases.
• A safe alternative to resorcinol when used as crosslinkers in rubber products.

Typical specification

• Intrinsic fire performance with low flame spread and extremely low smoke emissions.
• Thermosetting resins obtained in basic medium with excess formaldehyde are called resols or PF1.
• These resins are called novolacs or PF2.
• Novolac resins are sold in powder form for molding.

Storage, packaging and handling

• Degrades gradually from 150 degrees C.

Frequently asked questions about Phenol formaldehyde resin

In which applications is phenol formaldehyde resin used?

It is used in electrical laminates, abrasives, and can coatings.

What polymer type is obtained in acid medium with a deficiency of formaldehyde?

In acid medium and with a deficiency of formaldehyde, a thermoplastic polymer is first obtained.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.