Process for restoring discharded silicone-polycarbonate parts

Details Process for restoring discharded silicone-polycarbonate parts Process for restoring discharded silicone-polycarbonate parts

1993-09-22

1995-01-24

Lusignan, Michael

Coating processes

Restoring or repairing

156 94, 264 36, 427340, 427341, 427354, 427387, 4273935, 4274121, B32D 3500

Patent

active

053841590

ABSTRACT:
A process is provided for reclaiming rejected polycarbonate articles, such as an automotive headlamp-lens having a thermoplastic acrylic primer and a defective silicone hardcoat. The silicone hardcoat can be selectively removed with an aqueous alkaline bath treatment. The treated polycarbonate article can be recovered with the thermoplastic acrylic primer remaining substantially intact; the article can be restored by treatment with a silicone hardcoat.

REFERENCES:
patent: 4242381 (1980-12-01), Goossens et al.
patent: 4284685 (1981-08-01), Olson et al.
patent: 4401718 (1983-08-01), Medford
patent: 5041313 (1991-08-01), Patel

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