RHENOGRAN® WPD-70/SBR

Product Description

Rhenogran® WPD-70 is a pre-dispersed cellulose fiber masterbatch (68% wood pulp in SBR binder) for reinforcing both uncured and cured rubber compounds. It increases green strength, modulus, and flexural properties, while reducing cut growth and die swell. 

The resorcinol-based resin system contained by the binder ensures strong fiber-to-rubber bonding, especially when used with a methylene donor (e.g., Cohedur® A 200). Rhenogran® WPD-70 is suitable for NR, SBR, BR, and CR, and is typically added early in the mixing cycle for optimal dispersion. It is black in color but it is color stable.

THESE SPECIAL FEATURES MAKE THIS PRODUCT SO SUCCESSFUL

• Significantly improves green strength and modulus in NR, SBR, BR, and CR

• Reduces cut growth, die swell, and cold flow

• Enhances fiber-to-rubber bonding with methylene donors

• Provides consistent reinforcement and flexural strength

THE MOST COMMON AREAS OF APPLICATION

• Raw edge V-belt base compounds

• Low-pressure hoses, gaskets, and diaphragms

• Tire bead apex compounds

• Technical rubber goods requiring fiber reinforcement