Copolycarbonate resin and method for preparing the same

Patent metadata

Field	Value
Publication number	US-10030096-B2
Application number	US-201615508449-A
Country	US
Kind code	B2
Filing date	Jun 22, 2016
Priority date	Jul 1, 2015
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

The present disclosure relates to a polycarbonate resin and a method of preparing the same, has an effect of providing a polycarbonate resin having superior chemical resistance and wear resistance due to application of a predetermined comonomer thereto, and a method of preparing the same.

First claim

The invention claimed is:

1. A copolycarbonate resin, wherein the copolycarbonate resin is prepared by polymerizing a bisphenol based monomer, a comonomer represented by Formula 1 below, and a carbonate precursor, and an amount of the comonomer is 0.1 to 19% by weight based on a total weight of the bisphenol based monomer and the comonomer:

R1 and R2 are each independently C 1 to C 10 alkylene, and n is an integer of 1 to 50.

2. The copolycarbonate resin according to claim 1 , wherein the carbonate precursor is comprised in an amount of 10 to 150 parts by weight based on 100 parts by weight of a total of the bisphenol based monomer and the comonomer.

3. The copolycarbonate resin according to claim 1 , wherein the bisphenol based monomer is one or more 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, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, bis(4-hydroxyphenyl)diphenylmethane, and α,ω-bis [3-(o-hydroxyphenyl)propyl]polydimethylsiloxane.

4. The copolycarbonate resin according to claim 1 , wherein the carbonate precursor is a compound represented by Formula 2 below:

wherein X1, X2 are each independently a halogen, a haloalkyl group, a halocycloalkyl group, a haloaryl group, an alkoxy group, or a haloalkoxy group.

5. The copolycarbonate resin according to claim 1 , wherein the copolycarbonate further comprises a molecular weight regulator.

6. The copolycarbonate resin according to claim 5 , wherein the molecular weight regulator is mono-alkylphenol.

7. The copolycarbonate resin according to claim 5 , wherein an amount of the molecular weight regulator is 0.1 to 10 parts by weight based on 100 parts by weight of a total of the bisphenol based monomer and the comonomer.

8. The copolycarbonate resin according to claim 1 , wherein a weight-average molecular weight of the copolycarbonate resin is 10,000 to 50,000 g/mol.

9. The copolycarbonate resin according to claim 1 , wherein a reduced weight of the copolycarbonate resin after being brought into contact with 20% by weight of an aqueous HCl solution for 168 hours according to ASTM D543 is 10% by weight or less.

10. The copolycarbonate resin according to claim 1 , wherein wear resistance of the copolycarbonate resin is 1 B or more according to ASTM D3363.

11. A method of preparing a copolycarbonate resin, the method comprising a step of interfacially polymerizing a bisphenol based monomer, a comonomer represented by Formula 1 below, and a carbonate precursor:

wherein R1 and R2 are each independently C 1 to C 10 alkylene, and n is an integer of 1 to 50.

12. The method according to claim 11 , wherein, in the interfacially polymerizing, a molecular weight regulator is further comprised.

13. The method according to claim 11 , wherein, in the interfacially polymerizing, one or more of an acid binder, an organic solvent, and a reaction accelerator is further comprised.

14. The method according to claim 11 , wherein a tin content in the comonomer represented by Formula 1 is 10 ppm or less by mass (based on an element).

15. The method according to claim 11 , wherein a hydroxybenzoic acid content in the comonomer represented by Formula 1 is 500 ppm or less by mass.

16. The method according to claim 11 , wherein a hydroxybenzoic acid alkyl ester content in the comonomer represented by Formula 1 is 1.0% by mass or less.

17. A copolycarbonate resin composition, comprising 100 parts by weight of the copolycarbonate resin according to claim 1 , 0.005 to 0.5 parts by weight of a diphosphite compound, 0.001 to 0.5 parts by weight of alicyclic epoxy compound, and 0.01 to 1 parts by weight of modified silicone.

18. The copolycarbonate resin composition according to claim 17 , wherein the diphosphite compound is bis(2,4-dicumylphenyl)pentaerythritol diphosphite.

19. A molded article, comprising the copolycarbonate resin according to claim 1 .

20. The molded article according to claim 19 , wherein the molded article is an injection-molded article.

Assignees

• Lg Chemical Ltd

Inventors

• Ko Un
• Bahn Hyoung Min
• Chun Byoung Kyu
• Park Jung Jun
• Lee Ki Jae
• Son Young Wook
• Hong Moo Ho
• Hwang Young Young
• Kim Min Jeong

Classifications

• C08K5/1515

  Three-membered rings · CPC title

• C08J2463/00

  Characterised by the use of epoxy resins; Derivatives of epoxy resins · CPC title

• C08J2369/00

  Characterised by the use of polycarbonates; Derivatives of polycarbonates · CPC title

• C08K5/527

  Cyclic esters · CPC title

• C08L69/00

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