Appeal 2007-2677
Application 10/622,229
The Appellants’ invention is directed to an inkjet recording element
containing small and large core-shell particles which are said to dry very
quickly and provide images having high gloss and excellent resistance to
atmospheric image fade. Specification 4:30-5:2.
The small particles may be selected from, for example, silica,
alumina, titania, and zirconia. Specification 6:29-7:2.
The large particles may be selected from, for example, silica, alumina,
calcium carbonate, and zinc oxide. Specification 7:23-27.
At least one of the small and large particles is “shelled.” Specification
5:3-4.
The term “shelled” is used to indicate that the surfaces of the particles
have been chemically modified with a composition of matter that is different
from that of the “core,” or interior of the particles. Such surface-modified
particles are often referred to as “core-shell particles.” Specification 5:4-8.
At least one of the large and small particles present in the image-
receiving layer must be shelled with a material providing image fade
resistance. Specification 5:8-9.
Preferred shell materials are metal oxide hydroxide complexes.
Specification 5:15-29.
In another preferred embodiment the shell material comprises an
organosilane or hydrolyzed organosilane. Specification 6:3-15.
In yet another preferred embodiment the shell material comprises an
aluminosilicate polymer. Specification 6:21-25.
The small particles of the image-receiving element should have a
median particle size between about 20 and 180 nm, and it is further preferred
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