With cross linking reaction of Cashew Nut Shell liquid with different aldehyde donors like Formaldehyde/ hexamine /Para Formaldehyde to achieve the desired properties of Friction Dust. We react phenol formaldehyde resin with one of the aldehyde donors to make standard mesh sizes to powder form. It helps to improve wear and fade resistance which can be decomposed to various elevated temperatures to provide good flexibility in friction materials.
This free polymerized resin is granular, brown or black in color. It is used in metallic, semi-metallic, non-asbestos organic (NAO) and asbestos formulations for brake linings, disc pads, clutch facings and brake blocks.
Applications
Friction Modifiers for brake lining, brake pads, brake shoes, railway block and clutch facing to be used in metallic, semi-metallic and non asbestos brake products.
Characteristics
- It will reduce fade considerably to improved impact properties by dissipating heat faster than phenol-formaldehyde (PF) resins.
- Decomposition on the surface of a lining takes place at various elevated temperatures which controls the wear and offers a protective device by prohibiting excessive temperature from being developed
- Improved skid resistance and low brake noise
- The best Friction modifiers out of all modified phenolic offering impact resistance, flexibility, thermal stability
- Great water repellence, required in wet condition
- Cold Weather – CF ((CNSL-Formaldehyde)) resins give rise to a softer material, which is more efficient in ‘cold wear’
Hot Weather- Modified friction dust for applications in ‘hot wear’ conditions can be prepared from Modified CNSL Resin or from borated CNSL resin. Borated friction dust is known to be especially used in the production on air brake pads