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US 10,538,620 B2Granted
Method for preparing polycarbonate
AssigneeLG Chem, Ltd.
InventorsUn Ko, Byoungkue Chun, Moo Ho Hong, Young Wook Son, Tae Yun Ko
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Abstract
The present invention provides a method for preparing a polycarbonate by removing a solvent from a polycarbonate polymerization solution without impairing the physical properties of the polycarbonate.
Claims12
A method for preparing a polycarbonate, comprising the steps of:
- 1) adding an antioxidant, and a hydrolysis-resistant agent having an epoxy-fused aliphatic ring, to a polycarbonate polymerization solution;
- and
- 2) spraying steam at a temperature higher than a boiling point of removing a solvent in the polycarbonate polymerization solution onto the polycarbonate polymerization solution to evaporate the solvent to yield a solid polycarbonate.
Dependencies are inferred from the claim text.