Polycarbonate and preparation method thereof

Patent metadata

Field	Value
Publication number	US-11499010-B2
Application number	US-201915734954-A
Country	US
Kind code	B2
Filing date	Aug 9, 2019
Priority date	Aug 10, 2018
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

Provided is a polycarbonate of Chemical Formula 1:wherein in Chemical Formula 1:Ar is C6-60 arylene unsubstituted or substituted with C1-10 alkyl; andn and m are each independently an integer from 1 to 50, provided that n+m is 2 or more,and a preparation method thereof.

First claim

The invention claimed is:

1. A polycarbonate, comprising a repeating unit of the following Chemical Formula 1:

wherein in Chemical Formula 1:
Ar is C 6-60 arylene unsubstituted or substituted with C 1-10 alkyl; and
n and m are each independently an integer from 1 to 50, provided that n+m is 2 or more.

2. The polycarbonate of claim 1 , wherein the repeating unit of Chemical Formula 1 has a structure of one of the following Chemical Formulae 1a to 1c:

wherein in Chemical Formulae 1a to 1c, n and m are each independently an integer from 1 to 50, provided that n+m is 2 or more.

3. The polycarbonate of claim 1 , further comprising a repeating unit of the following Chemical Formula 2:

wherein in Chemical Formula 2:
R 1 to R 4 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen; and
Z is C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2 , or CO.

4. The polycarbonate of claim 3 , wherein R 1 to R 4 are each independently hydrogen or C 1-4 alkyl.

5. The polycarbonate of claim 3 , wherein a weight ratio of the repeating unit of Chemical Formula 1 and the repeating unit of Chemical Formula 2 is 5:95 to 40:60.

6. The polycarbonate of claim 1 , wherein a weather resistance index (ΔE) calculated according to the following Equation 1 is 1 to 15, and a melt index measured in accordance with ASTM D1238 (300° C., 1.2 kg condition) is 8 to 120 g/10 min:
Δ E =√{square root over ((( L′−L ) 2 +( a′−a ) 2 +( b′−b ) 2 ))}  Equation 1

wherein in Equation 1, L, a and b are measured for a specimen with a thickness of ⅛ inch in accordance with ASTM D7869, and L′, a′ and b′ are measured after leaving the specimen in 2250 hr weathering condition.

7. A method of preparing the polycarbonate of claim 1 , comprising polymerizing a composition containing a compound of the following Chemical Formula 3 and a carbonate precursor:

wherein in Chemical Formula 3:
Ar is C 6-60 arylene unsubstituted or substituted with C 1-10 alkyl; and
n and m are each independently an integer from 1 to 50, provided that n+m is 2 or more.

8. The method of claim 7 , wherein the compound of Chemical Formula 3 has a structure of one of the following Chemical Formulae 3a to 3c:

wherein in Chemical Formulae 3a to 3c, n and m are each independently an integer from 1 to 50, provided that n+m is 2 or more.

9. The method of claim 7 , wherein the composition further contains an aromatic diol compound of the following Chemical Formula 4:

wherein in Chemical Formula 4:
R 1 to R 4 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen; and
Z is a C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2 , or CO.

10. The method of claim 9 , wherein the aromatic diol compound of Chemical Formula 4 is 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, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, and 1,1-bis(4-hydroxyphenyl)-1-phenylethane.

11. A molded article, comprising the polycarbonate of claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Son Youngwook
• Yang Young In
• Lee Ki Jae
• Hong Mooho
• Jeon Byoungkue
• Hwang Young Young

Classifications

• C08G64/06 Primary

  not containing aliphatic unsaturation · CPC title

• C08G64/081

  containing sulfur · CPC title

• C08L69/00

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

• C08G64/18

  Block or graft polymers · CPC title

• C08G64/28

  and phenols · CPC title