Polybutadiene latex, preparation method thereof and ABS (Acrylonitrile Butadiene Styrene) resin

The invention relates to a preparation method of polybutadiene latex, which comprises the following steps: adding a fluorine-containing monomer, a polar monomer with solubility of 50-80g/L (solubility in water at 20 DEG C), butadiene, an initiator, an electrolyte, an emulsifier, a chain transfer agent and water into a reactor, heating to 55-90 DEG C, and carrying out polymerization reaction; and when the conversion rate of butadiene is greater than or equal to 60% and less than or equal to 70%, adding a (methyl) acrylate monomer with a non-polar ring structure in a side chain for copolymerization, and obtaining the polybutadiene latex when the conversion rate of butadiene is greater than or equal to 98%. Molecular chains in latex particles of the obtained polybutadiene latex are easy to slip, and when the polybutadiene latex is used for an ABS grafting reaction, the grafting rate is high. According to the ABS resin synthesized by the polybutadiene latex prepared by the method disclosed by the invention, the i