Flaky Nitrile Rubber Modlifed Phenolic Resin for Friction Materials
Novolac resins 4181 are produced by reacting formaldehyde with phenol under acidic conditions and modified with Nitrile Rubber to improve the Flexiability .
After cooled and solidified,it is milled to powder and mixed with around 10%of hexamethylenetetramine.
Novolak resins 4183 is recommended for the production of friction materials(disk pads,brake linings and
clutch facings)required reduced noise and judder,and improved impact strength