| US 7,511,092 B2 | ||
| Stabilized thermoplastic composition, method of making, and articles formed therefrom | ||
| Katherine Glasgow, Evansville, Ind. (US); Brian Mullen, Mt. Vernon, Ind. (US); Matthew Robert Pixton, Mt. Vernon, Ind. (US); and Philippe Schottland, West Chester, Ohio (US) | ||
| Assigned to SABIC Innovative Plastics IP B.V., Bergen op Zoom (Netherlands) | ||
| Filed on Oct. 07, 2005, as Appl. No. 11/246,651. | ||
| Prior Publication US 2007/0082989 A1, Apr. 12, 2007 | ||
| Int. Cl. C08K 5/10 (2006.01) | ||
| U.S. Cl. 524—298 [524/280; 524/293; 524/377] | 21 Claims |
| 1. A thermoplastic composition comprising:
a polycarbonate,
an ionizing radiation stabilizing additive, and
a poly-substituted aromatic compound of formula:
 wherein X is an aryl group; Y is a non-hydrogen substituent group, a is 1 to 4, b is 0 to 3, a+b is less than or equal to
4, and c is 0 or 1; and
wherein the amounts and identities of the polycarbonate, ionizing radiation stabilizing additive, and poly-substituted aromatic
compound are selected such that a molded article having a thickness of 3.18 millimeters and comprising the thermoplastic composition
has, after exposure to gamma radiation at 83 kGy and when measured according to ASTM D1925-70, an increase in yellowness index
(dYI) of less than or equal to 50, when compared to the unexposed thermoplastic composition.
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