Butyl rubber sealing tape used for automobile and preparing method thereof

The invention provides butyl rubber sealing tape used for an automobile. The butyl rubber sealing tape is prepared from, by weight, 15-20 parts of butyl rubber, 6-10 parts of nanoscale calcium carbonate, 30-40 parts of light calcium carbonate, 2-5 parts of acticel, 10-20 parts of low-molecular-weight polyisobutene, 4-10 parts of middle-molecular-weight polyisobutene, 4-10 parts of high-molecular-weight polyisobutene, 6-10 parts of pigment and 8-15 parts of petroleum resin. One face of the provided butyl rubber sealing tape used for the automobile is bonded with an automobile steel plate, and the other face is bonded with a plastic moisture-proof film to have the waterproof effect. Experiment results show that performance indexes of the butyl rubber sealing tape used for the automobile reach or exceed those of existing similar products, the butyl rubber sealing tape used for the automobile has the advantages that airtightness is good, the sealing tape is resistant to high temperature and does not flow, and the