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SpopisA few redox systems containing thiourea as reductant have been found to be quite effective in initiating vinyl polymerization in aqueous media and polymers obtained in the process have all been found to contain amino endgroups to various extents by the application of dye techniques. Quite a few oxidants have so far been utilized for this purpose; among them are ferric chloride (Fe3+), ethylene dibiguanide complex salts of tripositive silver (Ag3+), hydrogen peroxide ( H z~z ) , persulfate (Se0g2-), bromate (Br-In jedem Falle wurden geeignete Startmechanismen vorgesehlagen.

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