Appeal No. 95-1079
Application 08/037,192
We have carefully considered the respective positions
advanced by appellants and the examiner. For the reasons set
forth below, we will sustain the examiner's rejection.
Mahabadi discloses a process for the preparation of a
suspension of submicron polymeric particles comprising the steps
of (a) effecting partial bulk polymerization (10 to about 50%) of
a mixture comprising at least one monomer, a free radical
polymerization initiator, a crosslinking component and a chain
transfer component, (b) dispersing the bulk polymerization
product in water with a high shear mixer containing a stabilizing
component (e.g. non-ionic or ionic water soluble polymeric
stabilizers) to obtain a suspension of particles or droplets
having a diameter from about 0.1 to about 5.0 microns; and (c)
polymerizing the suspension to complete the conversion of monomer
to polymer (col. 3, lines 6-44). The resultant submicron
polymeric particles produced by Mahabadi’s process are useful as
powder coatings or as toner additives (col. 2, lines 27-38).
The prior art reference differs from the claimed subject
matter in that Mahabadi does not disclose the use of a stable
free radical agent to control molecular weight distribution
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