Phenol Formaldehyde Resin (Powder).
Liquid resin, concentrated, cooled into glass and milled to a fine powder. A solid phenolic for molding compounds, friction materials and bonded abrasives.
Amber glass to tan powderC₆H₅OH + HCHO → PF novolac
Liquid to glass to powder
Four changes of state, shown the way they actually happen: gradually, and in order.
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01 / 04
Clear to pale amber
Reaction
Phenol and formaldehyde are charged into a stainless reactor and heated under agitation. The liquid starts clear to pale amber and begins to condense into a prepolymer.
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02 / 04
Amber syrup
Dehydration under vacuum
Vacuum draws off water and excess formaldehyde. You can see the batch concentrate: the level drops, the colour deepens to amber and the syrup thickens around the agitator.
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03 / 04
Glassy amber sheet
Cooling on the belt
The hot resin is spread onto a chilled steel belt. It sets gradually along the belt, from a glowing melt to a glassy amber sheet, and only fractures into brittle flakes once it has cooled.
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04 / 04
Fine tan powder
Milling to powder
The flakes are fed into an impact mill. Only fine, free-flowing powder leaves the grinding chamber, light yellow to tan, ready to be packed and sealed for dispatch.
The same four stages, frame by frame
-
01 / 04
Clear to pale amber
Reaction
-
02 / 04
Amber syrup
Dehydration under vacuum
-
03 / 04
Glassy amber sheet
Cooling on the belt
-
04 / 04
Fine tan powder
Milling to powder
Overview
Powdered phenol formaldehyde resin starts life the same way as the liquid grades, in a reactor, but it is taken much further. The resin is concentrated under vacuum, cooled into a brittle, glassy sheet and milled into a fine, free-flowing powder that stores well and blends easily with fillers and fibres.
Our WP-PFP grades are supplied with or without a hexamine curing agent and ground to the fineness the application needs. Flow and cure speed are set for the customer’s molding or pressing temperature, whether that is a brake-lining line, a grinding-wheel press or a molding-compound plant.
Applications
| Appearance | Light yellow to tan free-flowing powder |
|---|---|
| Hexamine content | 0 – 10 % (by grade) |
| Flow at 125 °C | 20 – 60 mm |
| Gel time at 150 °C | 40 – 120 s |
| Fineness (through 200 mesh) | ≥ 95 % |
| Free phenol | ≤ 3.0 % |
| Moisture | ≤ 1.0 % |
Typical values, not a sales specification. A certificate of analysis accompanies every consignment; parameters are tailored to order.
Packaging & storage
Packed in lined bags sealed against moisture; pack sizes to order. Store cool and dry, keep bags closed between uses and avoid stacking in direct heat to prevent caking.
Also from Westcoast
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Deepens from clear to dark amber as the chains grow
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Turns from clear to milky as the chains link up
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Laminates & molding
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Hard, heat- and scratch-resistant chemistry for decorative laminates, overlays and molded tableware.
An opaque white slurry that turns glass-clear
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We supply sample quantities with full technical support. Send us your process conditions to begin.