Poly(1,2-dihydro-2,2,4-trimethylquinoline) is an industrial catalyst or plastic rubber additive, with examples of applications as follows: To prepare a material with sound insulation function, the sound insulation material comprises components including 100 parts nitrile rubber, zinc oxide, stearic acid, magnesium oxide,2, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, graphite powder, carboxyl silicone oil, accelerator, vulcanizing agent, wherein the material comprises components by weight: 100 parts of nitrile rubber, 4-7 parts of zinc oxide, 0.5-1.5 parts of stearic acid, 8-12 parts of magnesium oxide, 1.5-3.5 parts of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer, 7-12 parts of graphite powder, 3-6 parts of carboxyl silicone oil, 0.5-1.5 parts of accelerator, 2-6 parts of vulcanizing agent. The unit volume of the material is lighter than other sound insulation materials, which can reduce the weight on the use, reduce the overall quality of the application component, and have good sound insulation and attraction performance, and have long-term stable and reliable sound insulation attraction performance.