Transparent plastic article

US9546269B2 · kind B2 · utility

Assignee

• SABIC GLOBAL TECHNOLOGIES B.V. · NL

Inventors

• Peter Vollenberg · Evansville, US
• Christopher Luke Hein · Evansville, US
• Derek Lake · Evansville, US
• Daniel Francis Lowery · Mount Vernon, US
• Jon M. Malinoski · Evansville, US

Key dates

• Filing date: Aug 21, 2013
• Grant date: Jan 17, 2017
• Expiry date: Sep 23, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A plastic article is described having a thickness of 0.5 mm to 5 mm, comprising a polycarbonate thermoplastic composition including polycarbonates containing phthalimidine carbonate units, said composition providing a heat deflection temperature of at least 145° C., a light transmittance of at least 85%, and CIE 1976 L*, a*, b* values of L* greater than 92, a* between −1.5 and 1.5, and b* between −2.0 and 3.0, when tested in the form of a 3.2 mm thick test sample molded at 580° F. (304° C.) with a 1.7 minute residence time, using CIE illuminant C and 2 degree observer.