The invention discloses a
hindered phenol / montmorillonoid /
nitrile rubber composite damping material for a car. The
hindered phenol / montmorillonoid /
nitrile rubber composite damping material comprises raw materials including, by weight, 40-60 parts of
nitrile rubber, 30-40 parts of chlorinated
butyl rubber, 128-160 parts of
tetrahydrofuran, 42-61 parts of
maleic anhydride, 2-6 parts of
benzoyl peroxide, an appropriate amount of ethyl
alcohol, 1-3 parts of
hydroxide sodium hypophosphite, an appropriate amount of
xylene, 24-33 parts of
softwood celluloses, 1-2 parts of
stearic acid, 2-7 parts of
carbon black, 1-2 parts of sulphur, 4-7 parts of montmorillonoid, 2-4 parts of
hindered phenol HP1098, an appropriate number of
calcium chloride solution and an appropriate amount of deionized water. According to the hindered
phenol / montmorillonoid /
nitrile rubber composite damping material, the
maleic anhydride and the
nitrile rubber are grafted, and are then grafted with the
softwood celluloses for compounding; on one hand,
internal friction resistance of rubber molecular chain activity is strengthened, and the damping performance of the material is strengthened; and on the other hand, the character of the
softwood celluloses is used for improving the sound absorption and
noise lowering performance of the damping material, and the
nitrile rubber damping material which is excellent in sound absorption and
noise lowering performance is prepared.