RESIN HAVING IMPROVED POWDER CHARACTERISTICS SUITABLE FOR IMPROVING IMPACT RESISTANCE OF VINYL CHLORIDE RESINS

摘要

A synthetic resin powder improved in granulation properties, blocking resistance and other powder characteristics, which is prepared by coagulating an MBS resin latex satisfying the following relationships (1) and (2), adding a hard polymer in the form of a latex or a coagulation slurry in an amount of 0.1 to 10 parts by weight per 100 parts by weight of the MBS resin, and recovering a powder from the resulting mixture: -1.5x + 140 <= y <= -1.65x + 180 (1) 55 <= x <= 70 (2) ¢wherein x is butadiene content (wt. %) of MBS resin; and y is Vicat softening point (~C) of MBS resin!. This synthetic resin powder is useful as impact modifier for vinyl chloride resins and can impart excellent impact resistance to vinyl chloride resins without lowering in the transparency of the resins.