Silicone-polycarbonate block copolymers and polycarbonate blends having reduced haze, and method for making
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United States of America Patent
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Jun 25, 1996
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N/A
app pub date -
Jul 21, 1994
filing date -
Jul 21, 1994
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Abstract
A method is provided for making silicone polycarbonate block copolymers and polycarbonate blends thereof having reduced haze. Silicone polycarbonate block copolymer formation is effected by using a phase transfer catalyst to generate polycarbonate oligomers having at least one terminal haloformate group followed by the late addition of hydroxyaryl terminated polydiorganosiloxane.
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