Polycarbonate preparation from molten bisphenol-A/water mixture
First Claim
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1. In the interfacial polymerization of bisphenol-A with a carbonate precursor in a reaction mixture which comprises bisphenol-A, a carbonyl halide, water, a water-immiscible solvent, and a catalyst, to obtain an aromatic carbonate polymer, the improvement which comprises;
- adding the bisphenol-A to the reaction mixture in the form of molten bisphenol-A mixed with water.
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Abstract
In the interfacial polymerization process for preparing aromatic carbonate polymers by reacting bisphenol-A with a carbonate precursor, the bisphenol-A is introduced to the reaction medium in a liquid form saturated with water.
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3 Claims
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1. In the interfacial polymerization of bisphenol-A with a carbonate precursor in a reaction mixture which comprises bisphenol-A, a carbonyl halide, water, a water-immiscible solvent, and a catalyst, to obtain an aromatic carbonate polymer, the improvement which comprises;
- adding the bisphenol-A to the reaction mixture in the form of molten bisphenol-A mixed with water.
- View Dependent Claims (2, 3)
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Current AssigneeSabic Innovative Plastics IP BV (Government of Saudi Arabia)
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Original AssigneeGeneral Electric Company
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InventorsKissinger, Gaylord M.
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Primary Examiner(s)ANDERSON, HAROLD
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Application NumberUS07/826,319Time in Patent Office532 DaysField of Search528/196, 528/198, 528/199, 528/371, 528/179, 528/176, 528/182US Class Current528/196CPC Class CodesC08G 64/20 General preparatory processesC08G 64/24 and phenols
