| 摘要 |
PURPOSE:To obtain the titled beads of high weatherability and electrical conductivity, by dispersing, in an aqueous medium, carbon black-dispersed styrene monomer followed by suspension polymerization in the presence of a specific initiator to stably incorporate the carbon black in high concentration in said beads. CONSTITUTION:A styrene monomer pref. with a pH >=2.8 and average size <=100mmu, dispersed with carbon black normally at such a level as to be 1-10wt% (e.g., styrene, alpha-methylstyrene) is dispersed in an aqueous medium followed by suspension polymerization in the presence of, as an initiator, pref. 0.1-1.0pt.wt. per 100pts.wt. of said monomer, of a benzene ring-free bifunctional organic peroxide (e.g., di-t-butyl peroxymethyl cyclohexane), thus obtaining the objective styrene resin beads.
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