Vehicle nitrile butadiene rubber damping material having multi-channel sound absorption effect, and preparation method thereof
A technology of nitrile rubber and damping material, which is applied in the field of automobile parts preparation, can solve the problems of damping material shock absorption and insufficient sound absorption performance, and achieve the effects of good elastic recovery, alleviation of compression deformation, and improvement of compatibility.
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[0023] A kind of nitrile rubber damping material with multi-channel sound-absorbing effect for automobiles, consisting of the following raw materials in parts by weight: nitrile rubber 55, chlorinated butyl rubber 35, tetrahydrofuran 164, maleic anhydride 60, benzoyl peroxide 4. Appropriate amount of ethanol, sodium hypophosphite hydroxide 3, xylene appropriate amount, cork fiber 29, stearic acid 2, carbon black 4, sulfur 2, perlite 2, polyacrylamide emulsion 0.6.
[0024] Specific steps are as follows:
[0025] (1) Preparation of maleic anhydride grafted nitrile rubber (MAH-g-NBR):
[0026] Completely dissolve nitrile rubber in tetrahydrofuran, add the mixed solution of maleic anhydride and benzoyl peroxide drop by drop with a dropping funnel, pass through nitrogen protection, heat up to 70°C, react at constant temperature for 8 hours, and then precipitate out with ethanol The grafted product was washed several times with ethanol, and the washed grafted product was dried in ...
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