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US 4,363,905 AGranted
Polycarbonate transesterification from bis(ortho-nitroaryl)carbonate
AssigneeGeneral Electric Company
InventorDaniel J. Brunelle
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Abstract
A polycarbonate transesterification process comprising reacting a bis(ortho-nitroaryl)carbonate and a dihydric phenol under transesterification reaction conditions.
Claims12
A thermoplastic polycarbonate transesterification process comprising reacting (A) a bis(ortho-nitroaryl)carbonate of the formula, ##STR7## wherein Ar is an aromatic ring;
- with (B) a dihydric phenol under basic reaction conditions including a phase transfer catalyst.
A thermoplastic polycarbonate transesterification process comprising reacting (A) a bis(ortho-nitroaryl)carbonate of the formula:
- ##STR8## wherein Ar is an aromatic ring;
- with (B) bis(4-hydroxyphenyl)propane-2,2 under basic reaction conditions including a phase transfer catalyst.
Dependencies are inferred from the claim text.