Appeal 2007-3412
Application 10/832,450
14. The Specification presents a table in which two glass laminates, one
having a PVB layer with a Tg of 18°C and the other having a PVB layer with
a Tg of 30°C are compared. (Specification at 16.)
15. After 1 and 2 year-equivalents of light exposure, the sample having
the low Tg plastic layer had a PA for the glass layer in contact with the
infrared reflective layer of 5.0 (starting from 6.0 before UV exposure),
whereas the corresponding glass layer in the sample having the high Tg
plastic layer had a PA of 1.5 (starting from 5.0). (Specification
at 15:29-16:11.)
16. Interestingly, the PA for the glass on the other side of the plastic layer
was lower (5.0 after 1000 and 2000 hours, starting from 6.0 at 0 hours) for
the low Tg assembly than for the high Tg assembly (8.0 after 1000 hours and
6.5 after 2000 hours, starting from 7.5 at 0 hours). (Specification at 16:5-6.)
D'Errico 861
17. D'Errico 861 describes laminated glazing panels having an IR
reflective coating in contact with a plasticized PVB layer. A second layer of
glass is laminated to the other side of the PVB layer to complete the glazing
panel. (D'Errico 861 at 2:41–55.)
18. According to D'Errico 861, the adhesion between the plasticized PVB
and the glass is so strong that the PVB does not absorb impact blows
effectively. (D'Errico 861 at 2:51–53.)
19. The solution, according to D'Errico 861, was to use divalent metal
salts of C1 to C8 carboxylic acids as adhesion control agents to reduce the
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