Appeal No. 2002-0701
Application 09/201,269
THE INVENTION
The appellant claims a printing ink composition and an
overprint composition which include a branched vinyl resin having
a polydispersity of at least about 15,2 and claim a method for
making the ink composition. Claims 1, 19, 23 and 26 are
illustrative:
1. A printing ink composition comprising a solution of a
branched vinyl resin having a polydispersity of at least
about 15.
19. A method of making a printing ink, comprising the steps
of:
(a) preparing a branched vinyl resin by polymerizing a
monomer mixture that includes at least one monomer having at
least about two ethylenically unsaturated polymerizable bonds per
molecule in the presence of a free radical initiator at a
temperature at which said free radical initiator has a half-life
of less than about two minutes, wherein said polymerization
results in less than about 0.5% residual monomer based on the
total weight of the monomers being polymerized, and
(b) combining said branched vinyl resin with at least one
other material to form a printing ink, wherein the branched vinyl
resin is in solution in the printing ink.
23. A method of printing, comprising applying a printing
ink composition to a substrate, wherein said printing ink
composition includes at least a branched vinyl resin having a
polydispersity of at least about 15 and a weight average
molecular weight of at least about 100,000.
2 Polydispersity is the ratio of the weight average
molecular weight to the number average molecular weight
(specification, page 15, line 16).
2
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