Maleimide heat-resistant flame-retardant modifier, heat-resistant flame-retardant ABS and preparation method of heat-resistant flame-retardant ABS

The invention relates to a maleimide heat-resistant flame-retardant modifier, heat-resistant flame-retardant ABS (Acrylonitrile Butadiene Styrene) and a preparation method thereof, and belongs to the technical field of preparation of high polymer materials. The technical problem to be solved by the invention is to provide a novel maleimide heat-resistant flame-retardant modifier. The flame-retardant modifier is a styrene-N-maleimide-benzylallenitrile-maleic anhydride quadripolymer, and the structural formula of the flame-retardant modifier is as shown in a formula I in the specification. The novel maleimide heat-resistant flame-retardant modifier is synthesized by adopting a one-step solution polymerization method, the experiment is stable, simple and controllable, and the method has a simple synthesis route. The modifier can be used as a heat-resistant flame-retardant modifier of ABS resin, PVC and other materials, and can also be used as a compatilizer and a heat-resistant modifier of engineering plastic al