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US 12,595,335 B2Granted
Polycarbonate copolymer and method for preparing the same
AssigneeLG Chem, Ltd.
InventorsDayoung Lee, Youngwook Son, Hyong Min Bahn
Life of this patent
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Abstract
Provided is a polycarbonate copolymer having improved surface hardness while maintaining impact strength. The polycarbonate copolymer including a specific ester repeating unit according to the present disclosure is characterized by having excellent surface hardness while maintaining intrinsic basic physical properties of polycarbonate.
Claims10
A polycarbonate copolymer, comprising:
- a repeating unit represented by Formula 1;
- and
- a repeating unit represented by Formula 2, wherein a weight average molecular weight of the repeating unit represented by Formula 2 is 1,000 g/mol to 30,000 g/mol:
- wherein, in Formula 1,
- R1 to R4 are each independently hydrogen, C1-10 alkyl, C1-10 alkoxy, or halogen, and
- Z is C1-10 alkylene unsubstituted or substituted with phenyl, C3-15 cycloalkylene unsubstituted or substituted with C1-10 alkyl, O, S, SO, SO2, or CO,
- wherein, in Formula 2,
- Y is a divalent organic group represented by Formula 2-1 or Formula 2-2
5 more elements
A method of preparing a polycarbonate copolymer, the method comprising the steps of:
- (1) preparing a repeating unit represented by Formula 2, wherein a weight average molecular weight of the repeating unit represented by Formula 2 is 1,000 g/mol to 30,000 g/mol;
- and
- (2) copolymerizing the repeating unit represented by Formula 2 with a repeating unit represented by Formula 1:
- wherein, in Formula 1,
- R1 to R4 are each independently hydrogen, C1-10 alkyl, C1-10 alkoxy, or halogen, and
- Z is C1-10 alkylene unsubstituted or substituted with phenyl, C3-15 cycloalkylene unsubstituted or substituted with C1-10 alkyl, O, S, SO, SO2, or CO,
- wherein, in Formula 2,
- Y is a divalent organic group represented by Formula 2-1 or Formula 2-2
5 more elements
Dependencies are inferred from the claim text.