Appeal 2007-2774
Application 10/285,632
[20] Knipe does not describe adding a flocculant and/or coagulant to the
the used flush solution in an amount sufficient to form aggregated
paint particles of at least 20 microns in size.
3. Mahoney
[21] Mahoney describes treating aqueous solutions of paint in flush
solutions, e.g., from paint spray guns and other painting equipment,
with a polyarylamine polymer detackifier to convert the paint in the
"dirty" flush solutions into non-sticky sludge for easier removal
(Mahoney at abstract; col. 1, ll. 32-37; col. 3, ll. 34-39; col. 8, ll. 47-
56).
[22] The polyarylamine is formed by polymerizing an aromatic amine,
e.g., aniline, with an aldehyde, e.g., formaldehyde (Mahoney at col. 3,
l. 62 through col. 4, l. 26).
[23] The polyarylamine, alone or in combination with other detackifiers,
such as flocculants and coagulants, e.g., iron and aluminum salts, can
be mixed with the paint containing waste water by any known means
and the coagulated paint particles can be removed by any
conventional means, e.g., filtration (Mahoney at col. 9, ll. 4-61).
[24] Example 15 of Mahoney is said to describe a test protocol using a
simulated dirty flush solution of 1 ml of paint in 500 ml of process
water, i.e., simulated dirty flush solution containing 0.2 % paint by
volume (Mahoney at col. 12, ll. 37-50).
4. Mizuno
[25] Mizuno also describes a reagent useful to detackify paint in aqueous
paint suspensions, i.e., a reagent containing 0.1 to 20% by weight of a
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