Liquid butyl rubber and preparation method and application thereof

The invention relates to the field of liquid butyl rubber, and discloses liquid butyl rubber as well as a preparation method and application thereof, and the method comprises the following steps: under a solution polymerization condition, enabling a monomer material to be in contact with an initiator composition for polymerization reaction to obtain the liquid butyl rubber, wherein the monomer materials comprise a material A containing an isobutylene monomer and a material B containing an isoprene monomer; the initiator composition contains a hydrogen donor compound, Lewis acid and a solvent A; the temperature of the polymerization reaction is-75 DEG C to 0 DEG C; the hydrogen donor compound is water and/or hydrogen chloride; the solvent A is selected from at least one of dichloromethane, methane chloride and normal hexane. The method has the advantages that the process is simple, and the molecular weight and the unsaturation degree of the produced liquid butyl rubber are controllable. 本发明涉及液体丁基橡胶领域，公开了一种液体丁基