Appeal No. 1997-3392
Application 08/297,946
process. Claims 1 and 25 are illustrative:
1. A process for producing toner particles, comprising:
(a) providing a mixture of partially polymerized monomer
or comonomers until a degree of conversion is within about 1%
to about 5% of the onset of gel-effect;
(b) forming a suspension of the partially polymerized
monomer or comonomers;
(c) suspension polymerizing the partially polymerized
monomer or comonomers while commencing starved feed addition
of a second monomer or comonomers;
(d) selecting a starting time of said starved feed
addition into said suspension undergoing polymerization to
form said toner particles;
wherein said toner particles have a particle morphology
selected from the group consisting of core-shell, pseudo core-
shell having a composition gradient between a shell and a
core, and a polyblend of a low molecular weight dispersed
phase in a high molecular weight continuous phase.
25. Toner particles having a pseudo core-shell
microcapsule morphology produced by the process of claim 1,
said particles consisting of a shell and a core having a
composition gradient between said shell and said core.
THE REFERENCES
Sacripante et al. (Sacripante) 5,213,934 May 25,
1993
Cunningham et al. (Cunningham) 5,306,593 Apr. 26,
1994
2
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