C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 69/00 (2006.01) B32B 27/36 (2006.01) C08K 5/134 (2006.01) C08K 5/3475 (2006.01) C08K 5/3492 (2006.01) C08K 5/375 (2006.01)
Patent
CA 2159394
A thermoplastic polycarbonate molding composition free from organo phosphorus compounds and having an improved resistance to discoloration caused by exposure to High Intensity Discharge (HID) light and heat is disclosed. Accordingly, the molding composition contains (co)polycarbonate resin, a dimeric benzotriazole and an ester of a 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid. In a preferred embodiment, a sheet made of (co)polycarbonate resin is rendered improved resistance to discoloration by having applied to at least one of its surfaces an adherent protective film prepared from the polycarbonate composition of the invention.
Dunay Kevin F.
Krishnan Sivaram
Paul Winfried G.
Corporation Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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