Appeal No. 2002-0178
Application 09/385,909
consisting of the silicon macromer represented by formula (1) and
(meth)acrylamide monomers of a salt-forming group-having
polymerizable monomer. The vinyl polymer can be produced by
copolymerizing the above-mentioned monomers by known
polymerization methods. See column 6, lines 57-59.
The process of Tsutsumi “sometimes involves an additional
step of adding a surfactant together with water and a
neutralizing agent”. See column 2, lines 44-46.
As the salt-forming group-having polymer, to be used in the
invention of Tsutsumi, it is preferable to use a vinyl polymer
obtained by copolymerizing at least one monomer selected from the
group consisting of a silicone macromer represented by formula
(1), an acrylamide monomer and a methacrylamide monomer,
excluding those having salt-forming groups, with a salt-forming
group-having polymerizable unsaturated monomer and a monomer
copolymerizable with the above-mentioned monomers in the presence
of a radical polymerization initiator. See column 2, lines 60-68
and column 3, lines 1-5.
Examples of the salt-forming group-having polymerizable
unsaturated monomers include cationic monomers and unsaturated
ammonium salt containing monomers. Particular examples thereof
include monovinylpyridines. See column 4, lines 50-55. Examples
of anionic monomers include unsaturated carboxylic acid monomers,
unsaturated sulfonic acid monomers, and unsaturated phosphoric
acid monomers. See column 5, lines 8-12. Particular examples
include unsaturated carboxylic acid monomers such as acrylic
acid, methyl acrylate acid, crotonic acid, etc. See column 5,
lines 12-27. Particular examples of unsaturated sulfonic acid
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