Invention Grant
- Patent Title: Polysulfone compositions exhibiting very low color and high light transmittance properties and articles made therefrom
- Patent Title (中): 具有非常低的颜色和高透光性的聚砜组合物和由其制成的制品
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Application No.: US11627994Application Date: 2007-01-29
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Publication No.: US07662909B2Publication Date: 2010-02-16
- Inventor: Mohammad Jamal El-Hibri
- Applicant: Mohammad Jamal El-Hibri
- Applicant Address: US GA Alpharetta
- Assignee: Solvay Advanced Polymers, L.L.C.
- Current Assignee: Solvay Advanced Polymers, L.L.C.
- Current Assignee Address: US GA Alpharetta
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Main IPC: C08G75/20
- IPC: C08G75/20 ; H01L21/4763

Abstract:
A polysulfone composition is provided having a total luminous light transmittance of 84% or greater when measured on 0.1 inch thick specimens using ASTM D-1003. The specimens also meet at least one of the following two conditions: 1) a yellowness index (YI) of less than about 5.0 as measured according to ASTM D-1925 on 0.1 inch thick specimens, or 2) a color factor (CF) of less than about 25, wherein CF is defined by the following equation: CF=270[(x+y)sample−(x+y)air]/t wherein x and y are chromaticity coordinates measured in transmittance mode and t is sample thickness in inches. Another polysulfone composition is provided comprising a polysulfone, an organic phosphorous-containing melt stabilizer, and at least one of the following additives: a blue to violet dye, and an organic optical brightener. The polysulfone composition of the present invention is used to form transparent molded articles such as ophthalmic lenses.
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