Process for producing a polycarbonate in inert solvent

Details Process for producing a polycarbonate in inert solvent Process for producing a polycarbonate in inert solvent

1991-11-20

1994-06-21

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528171, 528174, 528196, 528202, 528370, 528371, C08G 6420

Patent

active

053229193

ABSTRACT:
A process for producing polycarbonates which comprises transesterifying by reacting (A) at least one compound selected from the group consisting of aromatic dihydroxy compounds, aliphatic dihydroxy compounds, bisesters of aromatic dihydroxy compounds, bisesters of aliphatic dihydroxy compounds, carbonates of aromatic dihydroxy compounds and carbonates of aliphatic dihydroxy compounds, with (B) at least one compound selected from the group of diaryl carbonates, dialkyl carbonates, and alkylaryl carbonates, at a transesterification temperature of 100.degree. C. to 330.degree. C. in the presence of an inert solvent in an amount of 1 to 60% by weight based on the total of the theoretical amount of polycarbonate produced from the said compounds (A) and (B) and the amount of the inert solvent. According to the present invention, a polycarbonate which is excellent in color tone (transparency), heat resistance, and water resistance can be efficiently and simply produced at a low cost.

REFERENCES:
patent: 4459384 (1984-07-01), Matzner et al.
H. Schnell, "Chemistry and Physics of Polycarbonates", 1964, Interscience Publishers, John Wiley & Sons, New York, London, Sydney, pp. 48-49, par. 1; FIG. III-3, p. 101, par. 6.
Chemisches Zentralblatt, vol. 136, No. 37, Sep. 8, 1965, Akademie-Verlag GmbH, Berlin, Verlag Chemie GmbH, Weinheim; No. 2920, p. 11755, "Herstellung von Polycarbonaten" of JP A.S. 11534/1962.
"Polycarbonate Resin", Nikkan Kogyo Shinbunsha, 1969, pp. 62-67 and English language translation.
Chemistry and Physics of Polycarbonates, H. Schnell, John Wiley & Sons, 1964, pp. 44-51.

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