Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Evonik Degussa ULTRASIL WL180/GR Precipitated Silica

Evonik Degussa ULTRASIL WL180/GR is a high-purity precipitated silica designed for demanding rubber applications. Featuring optimized particle size distribution and surface chemistry, it enhances reinforcement, abrasion resistance, and dispersion in high-performance tires and technical elastomers. Its GR grade ensures excellent processability and consistent green strength. Widely used in silica-reinforced tread compounds where wet grip and rolling resistance balance is critical.
  • evonik degussa ultrasil wl180 gr precipitated silica_df204fc7
  • evonik degussa ultrasil wl180 gr precipitated silica_df204fc7

Features Of Evonik Degussa ULTRASIL WL180/GR Precipitated Silica

  1. Highly dispersible precipitated silica with optimized particle morphology for enhanced reinforcement in rubber compounds.

  2. Low abrasion loss and excellent dynamic performance, contributing to improved tire tread wear resistance.

  3. Controlled surface chemistry ensuring strong polymer–filler interaction in silica–rubber systems.

  4. Free-flowing granular form (GR) enabling dust-free handling and consistent feeding in high-speed mixing lines.

  5. Consistent batch-to-batch quality certified under ISO 9001 and compliant with REACH and RoHS requirements.

Typical Applications Of Evonik Degussa ULTRASIL WL180/GR Precipitated Silica

  1. High-performance passenger car tire treads requiring low rolling resistance and high wet grip.

  2. Truck and bus radial (TBR) tire treads demanding extended service life and thermal stability.

  3. Specialty rubber compounds for industrial hoses, conveyor belts, and anti-vibration mounts.

  4. White or colored rubber goods where high brightness and low metal content are critical.

Specifications Of Evonik Degussa ULTRASIL WL180/GR Precipitated Silica

Chemical TypePrecipitated hydrated silica (SiO₂·nH₂O)
Product FormGranular (GR), free-flowing pellets
AppearanceWhite to off-white granules
BET Surface AreaApprox. 180 m²/g
DBP AbsorptionApprox. 280 mL/100 g
Loss on Drying (105 °C, 2 h)4.0 – 6.0 wt%
Residue on 45 µm Sieve≤ 0.5 wt%
pH (4% aqueous suspension)6.0 – 7.5


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