Phenol Formaldehyde Resin (Liquid).

When the bond must outlast weather, water and load. Boiling-water-proof phenolic chemistry for exterior-grade and structural panels.

Deep reddish amberC₆H₅OH + HCHO → PF resole

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How it’s made

Reflux, concentrate, cool

A liquid resole is built under reflux, concentrated under vacuum and then cooled quickly so it arrives exactly where the press needs it.

01 / 04 Clear, mixing
Charging and first reaction

Molten phenol and formaldehyde solution are pumped into the reactor and mixed under agitation. The reaction gives off heat from the start, so the batch is brought on gradually.
02 / 04 Boiling, building chains
Reflux

Vapour rises into the reflux condenser, cools and runs back into the batch. This controlled boil is where the polymer chains are built up.
03 / 04 Amber, thickening
Vacuum dehydration

The reflux loop is closed and vacuum applied. Water and unreacted formaldehyde come off at a lower temperature, and solids and viscosity rise toward the target.
04 / 04 Deep-amber liquid resin
Cooling and filtration

The finished resin is dropped into a jacketed vessel and cooled fast, then pumped through a filter press to remove any insolubles before it goes to storage.

Chain length

Concentration

Viscosity

Temperature

Process film

The same four stages, frame by frame

01 / 04 Clear, mixing
Charging and first reaction
02 / 04 Boiling, building chains
Reflux
03 / 04 Amber, thickening
Vacuum dehydration
04 / 04 Deep-amber liquid resin
Cooling and filtration

Exterior & structural

Overview

Liquid phenol formaldehyde resin (resole) is the benchmark for high-performance wood adhesives. Condensed from phenol and formaldehyde under alkaline catalysis, it cross-links into a bond that is fully waterproof, boil-resistant and structurally durable. It is the chemistry behind BWP and marine-grade plywood.

Our WP-PF series is supplied as a ready-to-use liquid resole, with viscosity, alkalinity and gel time controlled batch by batch to the customer’s pressing schedule. Beyond panels, the same chemistry serves industrial laminates, foundry binders and friction materials where heat and load are unforgiving.

Applications

BWP & marine plywoodBoiling-water-proof bonds for the toughest service conditions.

Structural & shuttering plyLoad-bearing panels for construction and concrete formwork.

Industrial laminatesPaper- and fabric-based phenolic laminates for electrical and mechanical duty.

Foundry & frictionBinder systems for foundry sands and friction components.

Typical properties · WP-PF series
Appearance	Dark reddish-brown liquid
Solid content	48 ± 2 %
Viscosity at 30 °C	300 – 600 cP
pH at 30 °C	11 – 13
Specific gravity at 30 °C	1.18 – 1.22
Gel time at 121 °C	8 – 14 min
Free phenol	≤ 2.0 %
Shelf life at 30 °C	60 days

Typical values, not a sales specification. A certificate of analysis accompanies every consignment; parameters are tailored to order.

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Packaging & storage

Supplied in MS or HDPE barrels of 230 kg net or by road tanker. Store below 30 °C in a ventilated area away from sunlight; agitate before use if stored long. Handle with standard alkaline-material precautions and refer to the MSDS supplied with each consignment.

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