| abstract |
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. n CONSTITUTION: A styrene monomer pref. with a pH ≥2.8 and average size ≤100mμ, dispersed with carbon black normally at such a level as to be 1W10wt% (e.g., styrene, α-methylstyrene) is dispersed in an aqueous medium followed by suspension polymerization in the presence of, as an initiator, pref. 0.1W1.0pt.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. n COPYRIGHT: (C)1986,JPO&Japio |