Polyurethane acoustic transmission glue capable of solidifying in medium and low temperature and anti-pollution polyurethane acoustic transmission glue

The invention relates to the field of acoustic transmission materials and in particular to anti-pollution polyurethane acoustic transmission glue capable of solidifying in medium and low temperature conditions. The used technical solution is as follows: the anti-pollution polyurethane acoustic transmission glue capable of solidifying in the medium and low temperature is prepared by uniformly mixing a component A and a component B and defoaming, through the pouring pre-forming and post-vulcanization, wherein the component A is a refined branched copolyether polyhydric alcohol prepolymer of which the NCO content is 3.5-6.0%; the component B is a mixture containing a compound catalyst, a compound chain extender and an anti-fouling composition; and the post-vulcanization is 72 h of the mediumtemperature vulcanization or 7 d of the low temperature vulcanization. A copolyether polyhydric alcohol of a new structure is prepared, and the anti-pollution polyurethane acoustic transmission glue is further prepared by the