C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/172
C08G 64/04 (2006.01) G11B 7/24 (2006.01)
Patent
CA 2033894
ABSTRACT OF THE DISCLOSURE COMPOSITION A composition comprising a polycarbonate of from about 10,000 to 18,000 viscosity average molecular weight said composition phosphorous containing additives; (1) essentially free of phosphorous containing additives, (2) having a YI as measured by ASTM D1925 of less than about 1.9, (3) a transparency as measured by ASTM D1003 of at least 89.5%, and (4) a retardation of no more than about 60 nm when molded into an audio disc 1.2mm thick and 102mm wide.
Barancik Martin B.
Miller Kenneth F.
Company General Electric
Craig Wilson And Company
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