Huntsville, Alabama -- PPG Industries' polyurethane adhesive and sealant technology is being used by the firm's aerospace transparencies group to develop "enhanced-design" windshields for the Airbus A320 aircraft.
"The redesigned windshields incorporate new PRC(R) sealants from PPG Aerospace, a different interlayer, and an improved electrical system that combine to provide a superior defence against moisture ingress," said James Romano, PPG Aerospace global director, commercial transparencies, in a 16 July company statement.
Two PU sealants provide the improved moisture resistance, Romano added.
PR-2060 is a new PU sealant added as an internal sealant and used behind a Z-retainer, while the firm's PR-1425CF is a chromate-free sealant that replaced PR-125 sealant as an outboard moisture seal because of its "green" formulation and faster cure, PPG said.
S-123 urethane bonds the outboard and middle glass plies in place of a urethane-vinyl-urethane sandwich. "It has a superior ability to maintain elasticity at low temperatures, preventing cold chipping, and high resistance to moisture damage," the statement added. (RD)
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