RHENOGRAN® PbO

Predispersed litharge curing activator for CSM & CR—improves water, chemical, and heat resistance.

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Product Description

Rhenogran® PbO 80 is a predispersed curing activator and stabilizer based on calcined litharge (PbO) in an EPDM binder. It is primarily used in chlorosulfonated polyethylene (CSM) and polychloroprene (CR) compounds, where it ensures high crosslink density, improving water resistance, chemical resistance and compression set performance.

Rhenogran® PbO-80 also enhances oil resistance and dimensional stability under harsh conditions. Due to the formation of black lead sulfide during vulcanization, it is recommended only for black or dark-colored compounds. The granulated masterbatch form guarantees low-dust handling and excellent dispersion, making it ideal for demanding technical applications.

THESE SPECIAL FEATURES MAKE THIS PRODUCT SO SUCCESSFUL

Predispersed litharge in EPDM—clean dosing and uniform dispersion
Induces high crosslink density for superior water, chemical, and oil resistance
Improves compression set and dimensional stability
Compatible with aldehyde-amine, guanidine, and thiourea accelerators
Ideal for harsh environments and high-performance rubber goods

THE MOST COMMON AREAS OF APPLICATION

CSM-based roll covers for paint, lacquer, and printing applications
Diaphragms and seals requiring water and chemical resistance
Cable compounds and extrusion profiles for open steam vulcanization
NR and synthetic rubber articles for X-ray protection (gloves, aprons)

Brand

RHENOGRAN®

Polymer auxiliaries

Activators, stabilizers

calcinated litharge

Lead (II) oxide

PbO

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