Detecting stoichiometric end point in aromatic polycarbonate res

Details Detecting stoichiometric end point in aromatic polycarbonate res Detecting stoichiometric end point in aromatic polycarbonate res

1983-10-05

1985-03-19

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

526 59, 526 60, C08G 6362

Patent

active

045060673

ABSTRACT:
A method for detecting the stoichiometric end point of a preparation of aromatic polycarbonate resin involving the use of phosgene and an organic solvent in which the phosgene is normally soluble which comprises detecting the increase of phosgene gas occurring in the vapor phase of the reactor at or following achievement of the stoichiometric end point of the aromatic polycarbonate preparation.

REFERENCES:
patent: 4378454 (1983-03-01), Dick et al.

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