Appeal 2007-3412
Application 10/832,450
25. The heat-wave-reflective coating is said to be photosensitive, in that
after long exposure to light, the bond between the coating and the PVB sheet
deteriorates. (D'Errico 848 at 1:39–41.)
26. In order to counteract the reduction of adhesion between the PVB
sheet and the photoreactive coating, D'Errico 848 adds an epoxy resin to the
PVB. (D'Errico 848 at 2:9–14.)
27. According to D'Errico 848, the plasticized PVB sheet containing the
epoxy resin must show a PA of at least 3.0 after at least 1000 hours exposure
in an accelerated aging exposure system. (D'Errico 848 at 2:66 to 3:3.)
28. The PVB resin is plasticized with about 20 to 80, more commonly
25 to 45 parts plasticizer per 100 parts resin. (D'Errico 848 at 3:57–60.)
29. Esters such as dihexyl adipate are said to be commonly employed as
plasticizers. (D'Errico 848 at 3:60–67.)
30. Results of a pummel adhesion test are reported for a control (no
epoxy) and five different epoxy resins (five parts per hundred parts
resin = 5 phr) dissolved in dihexyl adipate plasticizer (32 phr) and mixed
with a PVB resin (D'Errico 848 at 8:8 through 9:9; particularly at 8:8–11).
31. All PVB blends are said to have been satisfactory (i.e., PA of at
least 3) at 0 hours. (D'Errico 848 at 8:44-50.)
32. After 2000 hours of exposure to a xenon arc, epoxy E5 (a diepoxide of
poly(oxypropylene) glycol) provided PA vales of 4 for ZnO and In2O3 heat-
reflective layers, and a value of 3 for a TiO2 layer. (D'Errico 848, Table 1
at 9.)
7
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: September 9, 2013