Heavy Cardanol (heavy CNSL residue / cashew residol) has five dominant industrial applications, supported by its unique thermal stability and multi-functional phenolic activity:
- 1. Friction material raw material (largest consumption field): Heavy Cardanol is blended to produce modified phenolic resin for automotive brake pads, clutch facings and railway brake shoes. It enhances thermal fading resistance, reduces wear and brake noise, while partially replacing pure phenolic resin to lower production expenses.
- 2. Bioasphalt modifier: As a bio-based additive for road pavement and waterproof coil asphalt, Heavy Cardanol fixes asphalt's high-temperature flowing and low-temperature cracking defects, strengthening adhesion between asphalt and aggregate sand for eco-friendly highway construction.
- 3. Industrial adhesive & phenolic resin binder: Heavy Cardanol condenses with formaldehyde to make high-strength water-resistant glue for foundry sand cores, refractory materials and wood panels, substituting petroleum phenol massively.
- 4. Heavy anti-corrosion coating additive: Heavy Cardanol serves as core raw material for thick rust-proof primer on steel structures, underground pipelines and ship hulls; its phenolic hydroxyl groups provide passivation anti-rust performance, and long alkyl chains form hydrophobic barriers against water vapor penetration.
- 5. Rubber & plastic auxiliary agent: Manufacturers use Heavy Cardanol as rubber anti-aging plasticizer, PVC antioxidant stabilizer and color masterbatch dispersing carrier to boost oil resistance and weather resistance of rubber plastic products.
