Liquid nitrile rubber(LNBR) is a viscous liquid rubber with butadiene and acrylonitrile as main chain structure, containing or without other functional groups at room temperature. Its numerically average molecular weight is usually below 10000. LNBR is a new type of low molecular weight liquid toughening, plasticizer and rubber softener. LNBR is a viscous liquid rubber developed on the basis of nitrile rubber. A little yellow, transparent, tasteless. LNBR function: reactive plasticizer & softener. The combination with phenolic resin improves the brittleness of the resin and increases the flexibility and temperature resistance of the resin.