Polycarbonate resin composition and optical molded product comprising the same

Patent metadata

Field	Value
Publication number	US-10040937-B2
Application number	US-201615501098-A
Country	US
Kind code	B2
Filing date	Mar 31, 2016
Priority date	Jun 12, 2015
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

The present invention relates to a polycarbonate resin composition and an optical molded product comprising the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color uniformity which are required for a light guide plate, and also excellent in processability. Thus, it can be effectively used as a material of the light guide plate.

First claim

The invention claimed is:

1. A polycarbonate resin composition comprising 100 parts by weight of polycarbonate; and 0.05 to 5 parts by weight of polyoxytetramethylene-polyoxypropylene glycol random copolymer represented by the following Chemical Formula 1:

in Chemical Formula 1,
n and m are each independently an integer of 1 or more, and
n+m is 20 or more and less than 100.

2. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate has a weight average molecular weight of 14,000 g/mol to 30,000 g/mol.

3. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate includes a repeating unit represented by the following Chemical Formula 2:

in Chemical Formula 2,
p is an integer of 1 or more.

4. The polycarbonate resin composition according to claim 1 , wherein the polyoxytetramethylene-polyoxypropylene glycol random copolymer has a weight average molecular weight of 1,000 g/mol to 4,000 g/mol.

5. The polycarbonate resin composition according to claim 1 , wherein the polyoxytetramethylene-polyoxypropylene glycol random copolymer is included in an amount of 0.3 to 1.0 parts by weight, based on 100 parts by weight of the polycarbonate.

6. The polycarbonate resin composition according to claim 1 , further comprising 0.001 to 5 parts by weight of a vinyl-based polymer containing (meth)acrylate repeating unit containing an epoxy functional group, based on 100 parts by weight of the polycarbonate.

7. The polycarbonate resin composition according to claim 6 , wherein the epoxy functional group is bonded to a terminal of a branched chain of the (meth)acrylate repeating unit.

8. The polycarbonate resin composition according to claim 6 , wherein the (meth)acrylate repeating unit containing the epoxy functional group includes a repeating unit represented by the following Chemical Formula 3:

in Chemical Formula 3,
R 1 , R 2 and R 3 are each independently hydrogen; or a linear or branched alkyl group having 1 to 10 carbon atoms, R 4 is a linear or branched alkylene group having 1 to 10 carbon atoms, and x is an integer ranging from 1 to 20.

9. The polycarbonate resin composition according to claim 6 , wherein the vinyl-based polymer further comprises an aromatic vinyl-based repeating unit or a (meth)acryl-based repeating unit.

10. The polycarbonate resin composition according to claim 9 , wherein the aromatic vinyl-based repeating unit includes a repeating unit represented by the following Chemical Formula 4:

in Chemical Formula 4,
R 5 to R 8 are each independently hydrogen; or a linear or branched alkyl group having 1 to 10 carbon atoms, and y is an integer ranging from 1 to 20.

11. The polycarbonate resin composition according to claim 9 , wherein the (meth)acryl-based repeating unit includes a repeating unit represented by the following Chemical Formula 5:

in Chemical Formula 5,
R 11 to R 14 are each independently hydrogen; or a linear or branched alkyl group having 1 to 10 carbon atoms, and z is an integer ranging from 1 to 20.

12. The polycarbonate resin composition according to claim 6 , wherein the vinyl-based polymer containing the (meth)acrylate repeating unit containing the epoxy functional group has a weight average molecular weight of 1,000 g/mol to 10,000 g/mol.

13. The polycarbonate resin composition according to claim 6 , wherein the vinyl-based polymer containing the (meth)acrylate repeating unit containing the epoxy functional group has an epoxy equivalent weight of 100 g/mol to 500 g/mol.

14. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition includes one or more additives selected from the group consisting of an antioxidant, a thermal stabilizer, a plasticizer, an antistatic agent, a nucleating agent, a flame retardant, a lubricant, an impact modifier, a fluorescent brightener and an ultraviolet absorber.

15. An optical molded product comprising the polycarbonate resin composition according to claim 1 .

16. The optical molded product according to claim 15 , wherein the optical molded product is a light guide plate.

Assignees

• Lg Chemical Ltd

Inventors

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

Classifications

• G02B6/0065

  Manufacturing aspects; Material aspects · CPC title

• G02B1/045

  Light guides · CPC title

• C08L71/02

  Polyalkylene oxides · CPC title

• C08L69/00 Primary

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

• C08L33/08

  Homopolymers or copolymers of acrylic acid esters · CPC title