Method for the preparation of polycarbonate with reduced levels of fries

Method for the preparation of polycarbonate with reduced levels of fries

This invention relates to a composition comprising polycarbonate, wherein the polycarbonate has a low content of a particular branching species. This branching species is commonly known as the "Fries" branching species (hereinafter "Fries"), and upon treatment yields the molecule...

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Hauptverfasser: Ishida, Hiromi, Ishiwa, Kenichi, Okamura, Mitsuyasu, Shimoda, Tomoaki, Hoeks, Theodorus L, van Hout, Henricus H. M, Marugan, Monica M, McCloskey, Patrick J, King, Jr., Joseph A, Smigelski, Jr., Paul M
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creator Ishida, Hiromi
Ishiwa, Kenichi
Okamura, Mitsuyasu
Shimoda, Tomoaki
Hoeks, Theodorus L
van Hout, Henricus H. M
Marugan, Monica M
McCloskey, Patrick J
King, Jr., Joseph A
Smigelski, Jr., Paul M
description This invention relates to a composition comprising polycarbonate, wherein the polycarbonate has a low content of a particular branching species. This branching species is commonly known as the "Fries" branching species (hereinafter "Fries"), and upon treatment yields the molecule shown in formula I. More particularly, this invention relates to low Fries polycarbonate made by the melt synthesis method. This invention further relates to an optical disk comprising said low Fries polycarbonate, and to a method of injection molding which employs said polycarbonate. The present invention provides a composition comprising polycarbonate wherein the polycarbonate has a very low Fries content (e.g., above 5 ppm and below 360 ppm). The present invention also provides a polycarbonate having a very low Fries content which is made by the melt process. This polycarbonate has high ductility and high impact strength. The invention also provides a method for making these compositions. Another aspect of the invention is an optical disk comprising polycarbonate having a very low Fries content which is made by the melt process. Such optical disks resist breakage due to bending.
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The present invention provides a composition comprising polycarbonate wherein the polycarbonate has a very low Fries content (e.g., above 5 ppm and below 360 ppm). The present invention also provides a polycarbonate having a very low Fries content which is made by the melt process. This polycarbonate has high ductility and high impact strength. The invention also provides a method for making these compositions. Another aspect of the invention is an optical disk comprising polycarbonate having a very low Fries content which is made by the melt process. 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title Method for the preparation of polycarbonate with reduced levels of fries
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