Polycarbonate compound composition and method for preparing the same

Patent metadata

Field	Value
Publication number	US-12584013-B2
Application number	US-202218026320-A
Country	US
Kind code	B2
Filing date	Jun 9, 2022
Priority date	Jun 9, 2021
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

A polycarbonate compound composition and a method of preparing the same are provided. The polycarbonate compound composition comprises a polycarbonate including a repeating unit represented by Formula 1, and a polymer including a repeating unit represented by the following Formula 2, and has improved surface hardness while maintaining high impact strength.

First claim

The invention claimed is:

1 . A polycarbonate compound composition comprising a polymer blend of:
a polycarbonate including a repeating unit represented by the following Formula 1; and a polymer including a repeating unit represented by the following Formula 2, wherein a weight average molecular weight of the polycarbonate including the repeating unit represented by Formula 1 is 10,000 g/mol to 100,000 g/mol, the polycarbonate including the repeating unit represented by Formula 1 is included in an amount of 60 parts by weight to 90 parts by weight in the polycarbonate compound composition, and the polymer including the repeating unit represented by Formula 2 is included in an amount of 10 parts by weight to 40 parts by weight,

wherein,
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,
Y is a divalent organic group represented by the following Formula 2-1 or 2-2,

wherein,
* is a bonding site.

2 . The polycarbonate compound composition of claim 1 , wherein the repeating unit represented by Formula 1 is derived from one or more aromatic diol compounds selected from the group consisting of bis(4-hydroxyphenyl)methane, bis(4-hydroxyphenyl)ether, bis(4-hydroxyphenyl)sulfone, bis(4-hydroxyphenyl)sulfoxide, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)ketone, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis(4-hydroxyphenyl)propane (bisphenol A), 2,2-bis(4-hydroxyphenyl)butane, 1,1-bis(4-hydroxyphenyl)cyclohexane (bisphenol Z), 2,2-bis(4-hydroxy-3,5-dibromophenyl)propane, 2,2-bis(4-hydroxy-3,5-dichlorophenyl)propane, 2,2-bis(4-hydroxy-3-bromophenyl)propane, 2,2-bis(4-hydroxy-3-chlorophenyl)propane, 2,2-bis(4-hydroxy-3-methylphenyl)propane (bisphenol C), 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, and 1,1-bis(4-hydroxyphenyl)-1-phenylethane.

3 . The polycarbonate compound composition of claim 1 , wherein the repeating unit represented by Formula 1 is the following Formula 1-1:

4 . The polycarbonate compound composition of claim 1 , wherein a weight average molecular weight of the polycarbonate including the repeating unit represented by Formula 1 is 12,000 g/mol to 70,000 g/mol.

5 . The polycarbonate compound composition of claim 1 , wherein a weight average molecular weight of the polymer including the repeating unit represented by Formula 2 is 8,000 g/mol to 50,000 g/mol.

6 . The polycarbonate compound composition of claim 1 , wherein the polymer including the repeating unit represented by Formula 2 is included in an amount of 15 parts by weight to 35 parts by weight, based on 100 parts by weight of the polycarbonate compound composition.

7 . The polycarbonate compound composition of claim 1 , wherein a weight average molecular weight of the polycarbonate compound composition is 10,000 g/mol to 100,000 g/mol.

8 . The polycarbonate compound composition of claim 1 , wherein a pencil hardness of the polycarbonate compound composition is HB or more, as measured in accordance with ASTM D3363.

9 . The polycarbonate compound composition of claim 1 , wherein an Izod impact strength at room temperature of the polycarbonate compound composition is 500 J/m to 1,000 J/m, as measured in accordance with ASTM D256 (⅛ inch, Notched Izod) at 23° C.

10 . A method of preparing the polycarbonate compound composition of claim 1 , the method comprising:
preparing the polycarbonate including a repeating unit represented by Formula 1 (step 1); preparing the polymer including a repeating unit represented by Formula 2 (step 2); and blending the polycarbonate with the polymer including the repeating unit represented by Formula 2 (step 3).

11 . The method of claim 10 , wherein the step 2 includes polymerizing bisphenol C with compounds represented by the following Formula 3-1 and Formula 3-2:

wherein,
X is halogen.

12 . The method of claim 11 , wherein the compounds represented by Formula 3-1 and Formula 3-2 are used in an amount of 0.1 equivalent to 1 equivalent, respectively, based on the equivalent of bisphenol C, respectively.

Assignees

• Lg Chemical Ltd

Inventors

• Son Youngwook
• Lee Dayoung
• Bahn Hyong Min

Classifications

• C08G63/193

  containing two or more aromatic rings · CPC title

• C08L69/00 Primary

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title