Xeikon N.v.

Agfa Gevaert Nv

Geert Tersago

Serge M Tavernier

Stefaan K De Meutter

Werner J Op De Beeck

Werner Op De Beeck

Daniel Heitzmann

Gerrit Delen

A method for rounding thermoplastic particles whereby the thermoplastic particles are stirred at a temperature around their plastification temperature, T,, together with particles that are larger than the thermoplastic particles and that have a higher specific gravity.

Method for producing rounded polymeric particles

Dry toner particles with a resinous matrix containing a mixture of a polymer (LPC) with low softening point and tg&dgr;>3, modified by a modifier (D) selected from the group consisting of long chain aliphatic compounds with a reactive end group and having between 20 and 250 carbon atoms and a polysiloxane, said modifier and said polymer being present in a molar ratio LPC/D between 0.8 and 1.25 and a non-linear polymer with a softening point T,such that 110&deg; C.&lE;T,&lE;135&deg; C. The toner particles further contain a wax chosen from waxes having a melting point near to the softening point of the branched polymer B.

Toner particles containing a mixture of a modified linear polymer, a cross-linked polymer and a wax

Dry toner particles with a resinous matrix containing a mixture of a polymer (LPC) with low softening point and tg.delta.&gt;3, modified by a modifier (D) selected from the group consisting of long chain aliphatic compounds with a reactive end group and having between 20 and 250 carbon atoms and a polysiloxane, said modifier and said polymer being present in a molar ratio LPC/D between 0.8 and 1.25 and a non-linear polymer with a softening point T.sub.sB such that 110.degree. C. .ltoreq.T.sub.sB .ltoreq.135.degree. C. The toner particles further contain a wax chosen from waxes having a melting point near to the softening point of the branched polymer B.

Toner particles containing a mixture of a modified linear polymer, a

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Puurs, Belgium

Geert Tersago