Process for producing aromatic polycarbonate
AssigneeTeijin Limited
InventorsHiroaki Kaneko, Wataru Funakoshi, Katsushi Sasaki
Life of this patent
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Abstract
An aromatic polycarbonate and an active-hydrogen compound are subjected to the transesterification reaction in the presence of a transesterification catalyst under a reduced pressure condition followed by reaction with a salicylic acid ester derivative expressed by the following chemical formula (1), {wherein X is methyl or ethyl, and Y is a carbonyl group or a divalent functional group expressed by the following formula (2), (where Z is an alkylene group having a carbon number of 1 to 30, an arylene group having a carbon number of 6 to 30 or an aralkylene group having a carbon number of 7 to 30)}. An aromatic polycarbonate having a high molecular weight can be produced by this process.
Claims5
A process for the production of an aromatic polycarbonate characterized in that an aromatic polycarbonate and an active-hydrogen compound are subjected to the transesterification reaction in the presence of a transesterification catalyst under a reduced pressure condition followed by reaction with a salicylic acid ester derivative expressed by the following formula (1)
- {wherein X is methyl or ethyl;
- and Y is carbonyl group or a divalent functional group expressed by the following formula (2),
- (wherein Z is an alkylene group having a carbon number of 1 to 30, an arylene group having a carbon number of 6 to 30 or an aralkylene group having a carbon number of 7 to 30)}.
Dependencies are inferred from the claim text.