The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 2010
Filed:
Oct. 31, 2005
Ionizing radiation stable thermoplastic composition, method of making, and articles formed therefrom
Katherine Glasgow, Evansville, IN (US);
Brian Mullen, Mt. Vernon, IN (US);
Philippe Schottland, West Chester, OH (US);
Katherine Glasgow, Evansville, IN (US);
Brian Mullen, Mt. Vernon, IN (US);
Philippe Schottland, West Chester, OH (US);
Abstract
A thermoplastic composition comprises a polycarbonate, and an aromatic sulfonate compound of formula(Y)—Ar—(Z—S(O)—X)wherein each X is independently a substituted or unsubstituted C-Calkyl, substituted or unsubstituted C-Carylalkyl, substituted or unsubstituted C-Caryl, or substituted or unsubstituted C-Calkylaryl; Z is —O—, or substituted or unsubstituted —(O—C—)—O—, wherein w is 1 to 20; Ar is a C-Caromatic group; m is 0-3 and n is 3-6; and each Y is independently C-Calkyl, substituted C-Calkyl, C-Caryl, C-Calkyl-substituted C-Caryl, halogen, nitro, C-Calkoxycarbonyl, C-Calkoxy, or C-Cacyl, and further wherein a molded article having a thickness of 3.2±0.12 millimeters and consisting of the polycarbonate, aromatic sulfonate compound, and an effective amount of each of a mold-release agent and an antioxidant has, after exposure to a total gamma radiation dose of 83 kGy and when measured according to ASTM D1925-70, an increase in yellowness index (dYI) of less than or equal to 45, when compared to the unexposed molded article. Methods of making the thermoplastic composition, and articles prepared therefrom, are also disclosed.