Invention Grant
- Patent Title: Plastic composition comprising a polycarbonate made from low sulfur bisphenol A, and articles made therefrom
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Application No.: US15250244Application Date: 2016-08-29
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Publication No.: US09771452B2Publication Date: 2017-09-26
- Inventor: Johannes de Brouwer , Christopher Luke Hein , Thomas L. Evans , Hatem Abdallah Belfadhel , Marcel Vieveen , Christian Wold , Eric Brander
- Applicant: SABIC Global Technologies B.V.
- Applicant Address: NL Bergen Op Zoom
- Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
- Current Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
- Current Assignee Address: NL Bergen Op Zoom
- Agency: Cantor Colburn LLP
- Main IPC: C08G64/30
- IPC: C08G64/30 ; C08K3/00 ; C08K9/06 ; C09K11/02 ; H05B33/12 ; H01L33/56 ; C07C29/78 ; C07C37/20 ; G02B1/04 ; C07C37/84 ; C07C37/86 ; F21V29/70 ; C08G64/04 ; C09K11/57 ; C09K11/77 ; F21V3/04 ; F21V9/16 ; H01L33/50 ; F21Y115/10

Abstract:
In one embodiment, a light emitting device includes a lighting element located in a housing, wherein the housing is formed from a plastic composition including, for example, a polycarbonate formed from reacting, in the presence of a transesterification catalyst, a diaryl carbonate ester and a bisphenol A, wherein the bisphenol A has a sulfur concentration of 1 ppm to 15 ppm, based upon a weight of the bisphenol A; and a conversion material wherein the conversion material includes an inorganic material that converts radiation of a certain wavelength and re-emits of a different wavelength; wherein after the conversion material has been exposed to an excitation source, the conversion material has a luminescence lifetime of less than 10−4 seconds when the excitation source is removed.
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