Appeal 2007-0158
Application 10/415,202
preferably from 3 to 25, and in particular from 4 to 20% by
weight, based in each case on the solids of the coating material.
Where the epoxy resin powder coating material is used
alone, it is present in the coating material of the invention
preferably in an amount of from 5 to 30, more preferably from
6 to 25, and in particular from 7 to 20% by weight, based in
each case on the solids of the coating material. Specification
4:23-33.
7) With respect to the epoxy resin powder coating material, the
Specification teaches that the material “comprises at least one epoxy
resin in an amount of at least 40, more preferably at least 45, and in
particular at least 50% by weight, based in each case on the powder
coating material” (Specification 4:35-38). According to the
Specification, “[s]uch an amount of epoxy resin ensures that sufficient
epoxy resin is introduced as a reactive component into the coating
material by the powder coating material” (Specification 5:1-4).
8) The Specification discloses an Example in which an inventive
two-component coating material was prepared by combining all curing
and binder components and dispersing the mixture. The coating material
was dispensed into a container and was said to show outstanding storage
stability (Specification, Example 1).
9) Goldschmidt discloses techniques for manufacturing powder
coatings. Goldschmidt teaches premixing the formulation ingredients,
which include resin, crosslinker, pigment, and additives, followed by
melting and homogenization in an extruder (Goldschmidt 243). Upon
exiting the extruder, the melt is cooled, then finely ground and
pulverized (Goldschmidt 244-245).
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