| US 7,531,615 B2 | ||
| Thermally stable polycarbonates, thermoplastic compositions thereof, and articles formed therefrom | ||
| Gary C. Davis, Albany, N.Y. (US); James A. Mahood, Evansville, Ind. (US); James M. Silva, Clifton Park, N.Y. (US); and Joshua J. Stone, Clifton Park, N.Y. (US) | ||
| Assigned to SABIC innovative Platics IP B.V., Bergen op Zoom (Netherlands) | ||
| Filed on Jan. 04, 2006, as Appl. No. 11/324,949. | ||
| Prior Publication US 2007/0155945 A1, Jul. 05, 2007 | ||
| Int. Cl. C08G 64/00 (2006.01); C08G 63/02 (2006.01) | ||
| U.S. Cl. 528—196 [428/411.1; 428/412; 428/500; 524/115; 524/525; 524/611; 525/100; 525/190; 525/233; 528/10; 528/21; 528/171; 528/176; 528/198; 528/271; 528/272; 556/449] | 20 Claims |
1. A polycarbonate comprising repeating structural carbonate units of the formula (H-1):
 in which Rh is a radical having the formula (H-2):
 wherein each of R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, and R28 is independently a hydrogen, a C1-C6 alkyl group, or a halogen substituted C1-C6 alkyl group; and further comprising repeating structural carbonate units of the formula (A-4):
 wherein the polycarbonate has a weight average molecular weight (Mw) of from about 15,000 to about 100,000.
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