Transparent polycarbonate composition and molded article comprising same

Patent metadata

Field	Value
Publication number	US-9611386-B2
Application number	US-201314889166-A
Country	US
Kind code	B2
Filing date	Jul 8, 2013
Priority date	May 6, 2013
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

Provided is a transparent polycarbonate composition that includes: (A) 5 to 95 wt % of biphenyl modified polycarbonate including a repeating unit represented by Chemical Formula 1, a repeating unit represented by Chemical Formula 2, and a repeating unit represented by Chemical Formula 3; and (B) 1 to 50 wt % of an acrylate-based copolymer including (B-1) a repeating unit derived from aromatic (meth)acrylate having a refractive index of 1.58 to 1.70 and (B-2) a repeating unit derived from a mono-functional unsaturated monomer.

First claim

The invention claimed is:

1. A transparent polycarbonate composition, comprising:
(A) 5 to 95 wt % of biphenyl modified polycarbonate including a repeating unit represented by Chemical Formula 1, a repeating unit represented by Chemical Formula 2, and a repeating unit represented by Chemical Formula 3:

wherein, R 1 and R 2 are each independently a substituted or unsubstituted C1 to C6 alkyl group, and a and b are each independently an integer of 0 to 4;

wherein, R 1 and R 2 are each independently a substituted or unsubstituted C1 to C6 alkyl group, and a and b are each independently an integer of 1 to 4; and
(B) 1 to 50 wt % of a biphenyl or terphenyl modified (meth)acrylate-based copolymer including (B-1) a repeating unit derived from aromatic (meth)acrylate having a refractive index of 1.58 to 1.70 and (B-2) a repeating unit derived from a mono-functional unsaturated monomer.

2. The transparent polycarbonate composition of claim 1 , wherein in the (A) biphenyl modified polycarbonate, a ratio (M1:M2:M3) of the repeating unit represented by Chemical Formula 1 (M1), the repeating unit represented by Chemical Formula 2 (M2) and the repeating unit represented by Chemical Formula 3 (M3) is 10 to 85 mol %:5 to 30 mol %:10 to 80 mol %.

3. The transparent polycarbonate composition of claim 1 , wherein the (A) biphenyl modified polycarbonate has a weight average molecular weight of 20,000 to 40,000 g/mol.

4. The transparent polycarbonate composition of claim 1 , further comprising 90 wt % or less of (C) a bisphenol A-based polycarbonate prepared from reaction of 2,2-bis-(4-hydroxyphenyl)-propane (bisphenol A) and a compound selected from phosgene, halogen formate, dialkyl carbonate, diaryl carbonate, and a combination thereof.

5. The transparent polycarbonate composition of claim 4 , wherein based on the sum of the (A) biphenyl modified polycarbonate and the (C) bisphenol A-based polycarbonate, the repeating unit represented by Chemical Formula 2 (M2) is present in a ratio of 5 to 30 mol %, and the repeating unit represented by Chemical Formula 3 (M3) is present in a ratio of 10 to 80 mol %.

6. The transparent polycarbonate composition of claim 1 , wherein the (B-1) aromatic (meth)acrylate having a refractive index of 1.58 to 1.70 is represented by Chemical Formula 4:

wherein, R 1 is hydrogen or a methyl group, m is an integer of 0 to 10, and X is an orthobiphenyl group, a metabiphenyl group, a parabiphenyl group, a 2,6-terphenyl group, an orthoterphenyl group, a metaterphenyl group or a paraterphenyl group.

7. The transparent polycarbonate composition of claim 1 , wherein the (B) biphenyl or terphenyl modified (meth)acrylate-based copolymer is a copolymer of 1 to 50 wt % of the (B-1) aromatic (meth)acrylate having a refractive index of 1.58 to 1.70; and 50 to 99 wt % of the (B-2) mono-functional unsaturated monomer.

8. The transparent polycarbonate composition of claim 7 , wherein the (B) biphenyl or terphenyl modified (meth)acrylate-based copolymer is a copolymer of a mixture that further includes 0 to 49 wt % of (B-3) an alicyclic or aromatic (meth)acrylate having a refractive index of 1.490 to 1.579 and represented by Chemical Formula 5 or Chemical Formula 6:

wherein, R 1 is hydrogen or a methyl group, m is an integer of 0 to 10, and Y is selected from a cyclohexyl group, a phenyl group, a methylphenyl group, a methylethylphenyl group, a methoxyphenyl group, a propylphenyl group, a cyclohexylphenyl group, a chlorophenyl group, a bromophenyl group, and a benzylphenyl group;

wherein, R 1 is hydrogen or a methyl group, m is an integer of 0 to 10, Z is oxygen (O) or sulfur (S), and Ar is selected from a cyclohexyl group, a phenyl group, a methylphenyl group, a methylethylphenyl group, a methoxyphenyl group, a cyclohexylphenyl group, a chlorophenyl group, a bromophenyl group, and a benzylphenyl group.

9. The transparent polycarbonate composition of claim 7 , wherein the (B-2) mono-functional unsaturated monomer comprises at least one selected from the group consisting of C1 to C8 alkyl (meth)acrylate; unsaturated carboxylic acid; acid anhydride; C1 to C8 hydroxy alkyl (meth)acrylate; N-alkyl(meth)acrylamide; (meth)acrylamide; a vinyl cyanide monomer; allyl glycidyl ether; glycidyl (meth)acrylate; and an aromatic vinyl monomer.

10. The transparent polycarbonate composition of claim 1 , wherein the (B) biphenyl or terphenyl modified (meth)acrylate-based copolymer has a weight average molecular weight of 3,000 to 150,000 g/mol.

11. The transparent polycarbonate composition of claim 1 , wherein the (B) biphenyl or terphenyl modified (meth)acrylate-based copolymer has a refractive index of 1.495 to 1.640.

12. A molded article comprising the transparent polycarbonate composition of claim 1 .

13. The molded article of claim 12 , having a pencil hardness of F to 2H when measured according to a JIS K 5401 evaluation method and a scratch-resistant width ranging from 295 to 230 μm when measured in a BSP evaluation method.

14. The molded article of claim 12 , having a ⅛″-thick Izod impact strength ranging from 3 to 12 kgf·cm/cm when measured in an ASTM D256 evaluation method.

15. The molded article of claim 12 , having a haze ranging from 0.1 to 3.0% when measured in an ASTM D1003 evaluation method.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kwon Kee-Hae
• Kwon O-Sung
• Kim In-Chol
• Jang Joo-Hyun
• Hong Chang-Min

Classifications

• C08L33/12

  Homopolymers or copolymers of methyl methacrylate · CPC title

• C08L33/10

  Homopolymers or copolymers of methacrylic acid esters · CPC title

• C08L69/00 Primary

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

• C08L33/04

  Homopolymers or copolymers of esters {(C08L43/04 takes precedence)} · CPC title

• C08L33/06

  of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical · CPC title