Appeal No. 1997-1682
Application No. 08/270,198
2. A method for substantially eliminating yellowing from
exposure to UV light of a laminate of a UV-stabilized vinyl
film layer and a UV-cured top coat layer, comprising reducing
the presence of UV light in the vinyl film by providing the
laminate with a layer that blocks UV light from penetrating
the vinyl layer.
9. A yellow-resistant, vinyl film laminate comprising
(a) a plasticized polyvinylchloride layer, and (b) a UV-cured
top coat containing active UV-activatable, free radical-
generating species, wherein said free radical-generating
species and said plasticizer are sufficiently immiscible as to
avoid reaction in the presence of UV light to an extent
sufficient to cause yellowing of the polyvinylchloride layer.
The examiner relies upon the following references as
evidence of obviousness:
Olson et al. (Olson) 4,533,595 Aug. 06, 1985
DeBergalis et al. (DeBergalis) 4,585,693 Apr. 29, 1986
Tolliver et al. (Tolliver) 5,069,964 Dec. 03, 1991
Nakajima et al. (Nakajima) 5,254,525 Oct. 19, 1993
(filed Feb. 19, 1992)
Appellant's claimed invention is directed to a method for
preventing the migration of unreacted initiator in a UV-cured
top coat into a UV-stabilized vinyl film layer. The invention
defined by claims 2 and 6 accomplishes this end by placing a
UV-absorbing layer between the UV-cured top coat and the UV-
stabilized vinyl film. The invention defined by claims 9 and
11 are directed to an embodiment wherein the undesirable
migration is prevented by utilizing free radical-generating
species and plasticizers that are immiscible with each other.
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