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Synthesis of aromatic polycarbonates by an anhydrous catalytic solution process. I. The phosgene–phenol interaction
Author(s) -
Matzner Markus,
Kurkjy Raymond P.,
Cotter Robert J.
Publication year - 1965
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1965.070091009
Subject(s) - phosgene , bisphenol a , anhydrous , catalysis , polycarbonate , phenol , chemistry , bisphenol , solvent , organic chemistry , polymer , chloride , condensation , polymer chemistry , propane , epoxy , physics , thermodynamics
A two‐step, catalytic, anhydrous solution process was developed for the preparation of the polycarbonate of 2,2‐bis( p ‐hydroxyphenyl)propane (bisphenol‐A). It involves the preparation of the dichloroformate of bisphenol‐A followed by its condensation with bisphenol‐A in the presence of magnesium metal. Attempts were also made to develop a one‐step, catalytic solution process. The reaction of bisphenol‐A with phosgene, in the presence of aluminum chloride, a very powerful catalyst, led to polymers with reduced viscosities as high as 0.35. Higher viscosities were not obtained due to the lack of a suitable, nonreactive solvent.