Fast-dissolving particle reclaimed rubber and preparation method thereof

The invention relates to fast-dissolving particle reclaimed rubber and a preparation method thereof. The fast-dissolving particle reclaimed rubber is prepared from, by mass, 100 parts of truck tire whole tire rubber powder, 15-20 parts of a swelling agent, 1.5-5 parts of a multifunctional fast-dissolving agent, 1-2 parts of a tackifier, 0.5-2 parts of reinforcing resin and 1-2.5 parts of a coupling agent. The truck tire whole tire rubber powder is derived from a steel wire radial tire with the specification of 9.00-12.00, and the multifunctional quick dissolving agent is a mixture of higher fatty acid salt, polyethylene glycol 400 monostearate and an antioxidant. The performance of the fast-dissolving particle reclaimed rubber meets the R-TW index in the national standard GB/T13460-2016, the fast-dissolving particle reclaimed rubber is low in energy consumption, economical and environmentally friendly, can be quickly dissolved in practical application, and is good in compatibility and slow in Mooney viscosity