Manufacturing method of thermoplastic impact modifier excellent in low-temperature impact resistance and processability

摘要

When the temperature of the reactor reaches 50-60C, ion-exchange water, emulsifier and monomer are added and the polymerization regulator and initiator are added and polymerized to obtain rubber latex (A) having a particle size of 0.1-0.2 m, emulsifier (B) having a particle diameter of 0.25 to 0.4 m which is different from that of the rubber latex (A) and 5 to 95 parts by weight of the rubber latex (A) Emulsifier, monomer, and molecular weight in an external pre-emulsion tank while charging the initiator and the reducing agent at not less than 30 parts by weight and not more than 80 parts by weight of the mixed rubber latex, And a second step of graft-polymerizing the preemulsion prepared by stirring at least 20 parts by weight and not more than 70 parts by weight of the preemulsion prepared by stirring the cross-linking agent, the cross-linking agent, the grafting agent and the pH adjusting agent into the rubber latex by a continuous polymerization method Process for producing a thermoplastic impact modifiers.