Molded polycarbonate articles having improved optical and...

Details Molded polycarbonate articles having improved optical and... Molded polycarbonate articles having improved optical and...

2007-04-10

2007-04-10

Boykin, Terressa (Department: 1711)

Stock material or miscellaneous articles

Composite

Of polycarbonate

C264S176100, C264S219000, C528S196000, C528S198000

Reexamination Certificate

active

10990596

ABSTRACT:
A transparent sheet having improved optical properties is disclosed. The sheet that features a deviation angle αε(min) according to DIN 52305-A-AS of ≦2.0 and a refracting power Dε(min) according to DIN 52305-A-AZ of ≦0.05, is prepared by extruding a molding composition comprising linear (co)polycarbonate having weight average molecular weight of 25,000 to 31,000.

REFERENCES:
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patent: 4661394 (1987-04-01), Curry et al.
patent: 5846659 (1998-12-01), Löwer et al.
patent: 5856012 (1999-01-01), Kühling et al.
patent: 6613264 (2003-09-01), Numrich et al.
patent: 6833193 (2004-12-01), Anders et al.
patent: 2003/0064226 (2003-04-01), Anders et al.

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