Appeal No. 1996-2015
Application No. 08/181,539
Claims 28 and 29 are illustrative:
28. An apparatus for suspension polymerization of a monomeric composition
of uniformly sized particles having a narrow distribution, said apparatus comprising:
first retaining means for retaining a disperse phase component comprising a
monomeric composition;
second retaining means for retaining a continuous phase component comprising
a medium;
disperser means for forming a dispersion of said disperse phase component and
said continuous phase component, said disperser means comprising a stationary part
having a first circular surface and a second annular surface surrounding and concentric
with said first surface, a rotating part having a third circular surface confronting said first
surface and a fourth annular surface surrounding and concentric with said third surface
and confronting said second surface, said first surface and said third surface having
substantially the same shape and defining a space therebetween having substantially a
uniform thickness, a uniform shear force generating field being disposed in said space,
said second surface and said fourth surface having substantially the same shape and
defining a gap therebetween in the range of about 1.8 mm or less;
first supplying means for supplying said disperse phase component from said
first retaining means to said shear force generating field at a constant rate;
second supplying means for supplying said continuous phase component from
said second retaining means to said shear force generating field at a constant rate, said
first and second means being independent whereby said disperse phase component and
said continuous phase component contact one another for the first time in said shear
force generating field, and substantially all of said dispersion must pass through said gap
after being dispersed in said shear force generating field;
polymerization means for polymerizing said dispersion; and
means for supplying said dispersion to said polymerization means.
29. An apparatus for suspension polymerization of a monomeric composition
of uniformly sized particles having a narrow distribution comprising:
first retaining means for retaining a disperse phase component comprising a
monomeric composition;
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