Abstract:A stable homogeneous cross-linked copolymer emulsion (AC) with 100 nm diameter was prepared by emulsion polymerization with butyl acrylate (BA) and ethyl acrylate (EA) as monomers. Thereafter, high impact polyvinyl chloride resin (AC-PVC) can be gotten if the above AC can be used as toughening modifier in vinyl chloride (VC) suspension polymerization system because of in situ graft copolymerization and in situ blending coexist. It was difficult to watch the stability of VC suspension polymerization with AC emulsion in a 20 L high pressure reactor, so trichloroethylene suspension polymerization system was simulated at first. Effects of emulsifier kinds, EA dosage, amount of dispersion agent on particle size of AC and AC-PVC properties were studied. Results show that autoclave sticking was obviously weakened, and the proportion of coarse size of AC-PVC is reduced, but the impact resistance of AC-PVC is significantly improved. The maximum notch impact strength of AC-PVC is 27 times higher than that of SG-5 PVC resin.