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Wesil PRX
Binder system to reduce phenolics
WESIL PRX Binder is a blend of natural starches and our proprietary aluminosilicate binder designed to replace phenolic resins in low- fiber hot top boards and other insulating fixtures used in metal production, smelting, and casting.

WESIL PRX is not quite as effective as some phenolics and may require more for equivalent hardness; we suggest you try it first at 5% by weight and adjust from there for desired strength and hardness.

Wesil PRX offers these advantages

Replaces Noxious Phenolics - No "Phenol" fumes during use, and greatly reduced waste water disposal problems.
Lower Drying Temperatures - Contains a heat set resin that cures at 200°F so good strength is obtained at a drying temperature of 250°F, eliminating the high baking temperature required with phenolics..
More Moisture Tolerant Finished Part - Formed parts are more able to maintain hardness and strength if exposed to humidity.
No Cristobalite - Completely cristobalite free at use temperature eliminating a common source of thermal shrinkage problems and health related concerns.
Typical Physical Properties

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Color Cream
Consistency Medium density dry powder
Approximate Bulk Density (pcf) 34
Loss on Ignition* 4 – 5% (water of hydration)
Fusion Point (Inorganic Binder) 2400oF
Toxicity Non-toxic. Do not breathe dust. See MSDS.
Packaging Fiber drums, 250 lbs net; cartons, 45 lbs net.
*Typical value for Wesil PRX bonded fiber products.

WesBond Corporation

1135 East 7th Street

Wilmington, DE  19801

phone (302) 655-7917 fax (302) 656-7885 

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