Silicon-coated lightweight functional master batch and preparation method thereof

The invention discloses a silicon-coated lightweight functional master batch and a preparation method thereof.The preparation method comprises the following steps that a surface treating agent and a bridging agent are sequentially added into lightweight inorganic powder in a kettle type stirrer in an atomized spraying mode and mixed to be uniform, and a mixture is prepared; carrying out kneading treatment on vinyl-terminated dimethyl methyl vinyl polysiloxane, trimethyl-terminated vinyl methyl polysiloxane, laurinol and a platinum rhodium complex in a kneading machine in advance to prepare linear siloxane glue, then adding the prepared mixture, and continuing kneading treatment to prepare a mixed material; the master batch disclosed by the invention is small in density, good in weight reduction effect and good in bonding property with a rubber matrix, and a material prepared by adding the master batch into the rubber matrix is good in wear resistance, high in tearing strength and good in rebound resilience. 本