Process for manufacturing polycarbonate from dianhydrohexitol Dialkylcarbonate

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United States of America Patent

PATENT NO 9040654
APP PUB NO 20140031517A1
SERIAL NO

14110292

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Abstract

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A process for manufacturing a polycarbonate, having a glass transition temperature greater than or equal to 50° C., includes: a step (1) of introducing into a reactor a monomer of formula (I) and R1 and R2 being identical or different alkyl groups; a step (2) of introducing into the reactor at least one cyclic diol or a mixture of diols (B) including at least 20 mol % of cyclic diols; a subsequent step (3) of polycondensation via transesterification of the mixture of monomers including the monomers (A) and (B); a step (4) of recovering the polycarbonate formed during step (3).

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Patent Owner(s)

  • ROQUETTE FRERES

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ibert, Mathias La Chapelle d'armentieres, FR 30 47
Josien, Emilie St Venant, FR 4 13
Wyart, Herve Cuinchy, FR 14 87

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