Process of preparing polycarbonates using microwave
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United States of America Patent
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Feb 25, 2003
Grant Date -
Feb 21, 2002
app pub date -
Jul 13, 2001
filing date -
Jul 14, 2000
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Abstract
The present invention relates to a process of preparing polycarbonate, more specifically to a process of preparing polycarbonates by solid state polymerization using microwave radiation, which comprises steps of preparing polycarbonate prepolymer having a certain range of viscosity average molecular weight; converting said polycarbonate prepolymer into crystalline particles having a certain degree of crystallinity; and producing polycarbonates by solid state polymerization of said crystalline particles by applying microwave radiation, thus resulting in production of high quality polycarbonates with high molecular weight within short time.
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