Polycarbonate terminated by an ionic sulfonated aromatic moiety

Details Polycarbonate terminated by an ionic sulfonated aromatic moiety Polycarbonate terminated by an ionic sulfonated aromatic moiety

1995-08-25

1997-07-01

Mosley, Terressa

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528199, 528373, C08G 6302

Patent

active

056440170

ABSTRACT:
An aromatic polycarbonate is terminated by an ionic sulfonated aromatic moiety bonded to the polycarbonate by a carbonate or ester linkage. The aromatic polycarbonate can be terminated by reacting a sulfonated aromatic compound such as a sulfonated phenol, sulfonated benzoic acid, phenyl ester of a sulfonated aromatic carboxylic acid and sulfonated diphenyl carbonate with an aromatic polycarbonate, an aromatic dihydroxy compound and a carbonate precursor, or a combination thereof. The reaction can be performed in a nonaqueous solution or a melt transesterification process. The aromatic sulfonated terminated polycarbonate can be thermally molded and displays non-newtonian melt rheology and improved solvent resistance.

REFERENCES:
patent: 3959561 (1976-05-01), Walles
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patent: 4316838 (1982-02-01), Tokuda
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patent: 4469860 (1984-09-01), Rosenquist
patent: 5097002 (1992-03-01), Sakashita et al.
patent: 5097005 (1992-03-01), Tietz
patent: 5227456 (1993-07-01), Shepherd et al.
Degree et al., Synthesis and Characterization of Halato-Telechelic Bisphenol-A Polycarbonates, Polymer, vol. 35, No. 2, pp. 371-376 (1994).

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