Radiation crosslinking halogen-free flame retardant polyurethane elastomer and preparation method thereof

The invention relates to a radiation crosslinking halogen-free flame retardant polyurethane elastomer and a preparation method thereof. The preparation method has the characteristic of being simple in process, and the provided elastomer has excellent technical performance. According to the technical scheme, the radiation crosslinking halogen-free flame retardant polyurethane elastomer comprises the components of thermoplastic polyurethane (TPU) and the like. The preparation method of the radiation crosslinking halogen-free flame retardant polyurethane elastomer is carried out in the following steps of (1) weighing various raw materials; (2) putting the TPU raw material into an oven; (3) putting the dried TPU into a stirrer, and then adding an auxiliary radiation crosslinking material and a sensitizer for stirring; (4) adding other materials to a mixture treated in the step (2), and then stirring and mixing evenly; (5) adding the mixed materials to a twin-screw extruder, extruding and carrying out water cooled pelletizing to obtain the crosslinking halogen-free flame retardant polyurethane elastomer; and (6) forming a finished product and carrying out radiation crosslinking.