Polycarbonate resin composition and molded article produced therefrom

Patent metadata

Field	Value
Publication number	US-9284450-B2
Application number	US-201314044941-A
Country	US
Kind code	B2
Filing date	Oct 3, 2013
Priority date	Dec 14, 2012
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

The polycarbonate resin composition includes: a polycarbonate component, which includes an aromatic polycarbonate resin and a copolymerized polycarbonate resin including a repeat unit represented by Formula 1 and a repeat unit represented by Formula 2; and a flame retardant, and has a scratch width of about 310 μm or less as measured by Ball-type Scratch Profile (BSP) test; a pencil hardness rating of F or higher; a flame retardancy level of V-0 or higher as measured on a 2.0 mm thick specimen according to UL94; and a transmittance of about 80% or more as measured in accordance with ASTM D1003. The polycarbonate resin composition can exhibit excellent properties in terms of scratch resistance, flame retardancy and transparency.

wherein R 1 and R 2 are the same or different and are each independently substituted or unsubstituted C 1 to C 6 alkyl, and a and b are the same or different and are each independently an integer from 1 to 4.

First claim

What is claimed is:

1. A polycarbonate resin composition comprising:
a polycarbonate component, which comprises an aromatic polycarbonate resin and a copolymerized polycarbonate resin comprising a repeat unit represented by Formula 1 and a repeat unit represented by Formula 2; and
a flame retardant,
wherein the polycarbonate component comprises the aromatic polycarbonate resin in an amount of about 30 wt % to about 70 wt % and the copolymerized polycarbonate resin in an amount of about 30 wt % to about 70 wt %,
wherein, in the copolymerized polycarbonate resin, the repeat unit represented by Formula 1 is present in an amount of about 5 mol % to about 70 mol % and the repeat unit represented by Formula 2 is present in an amount of about 30 mol % to about 95 mol %, and
the polycarbonate resin composition having: a scratch width of 290 μm or less as measured by Ball Scratch Profile (BSP) test; a pencil hardness rating of F or higher; a flame retardancy level of V-0 or higher as measured on a 2.0 mm thick specimen according to UL94; a Vicat softening temperature (VST) of 102.5° C. or more, as measured in accordance with ASTM D1525; and a transmittance of about 85% or more as measured in accordance with ASTM D1003,

wherein R 1 and R 2 are the same or different and each independently substituted or unsubstituted C 1 to C 6 alkyl, and a and b are the same or different and each independently an integer from 1 to 4.

2. The polycarbonate resin composition according to claim 1 , wherein the repeat unit represented by Formula 2 is a repeat unit represented by Formula 2a:

3. The polycarbonate resin composition according to claim 1 , comprising the flame retardant in an amount of about 5 parts by weight to about 40 parts by weight based on about 100 parts by weight of the polycarbonate component.

4. The polycarbonate resin composition according to claim 1 , wherein the copolymerized polycarbonate resin further comprises a repeat unit represented by Formula 3:

wherein R 3 and R 4 are the same or different and are each independently substituted or unsubstituted C 1 to C 6 alkyl, and m and n are the same or different and are each independently an integer from 0 to 4.

5. The polycarbonate resin composition according to claim 4 , wherein the repeat unit represented by Formula 3 is present in an amount of about 1 part by mole to about 30 parts by mole based on about 100 parts by mole of the repeat units represented by Formulae 1 and 2.

6. A molded article produced from the polycarbonate resin composition according to claim 1 .

7. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a Vicat softening temperature (VST) of about 102.5° C. to about 130° C. as measured in accordance with ASTM D1525.

8. The polycarbonate resin composition according to claim 7 , wherein the polycarbonate resin composition has a transmittance of about 85% to about 95% as measured in accordance with ASTM D1003.

9. The polycarbonate resin composition according to claim 1 , wherein the aromatic polycarbonate is prepared by condensation or transesterification of a dihydric phenol compound and a carbonate precursor, wherein the dihydric phenol compound is selected from the group consisting of 2,2-bis(4-hydroxyphenyl)propane, hydroquinone, 4,4′-dihydroxydiphenyl, bis(4-hydroxyphenyl)methane, 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)sulfone, bis(4-hydroxyphenyl)sulfoxide, bis(4-hydroxyphenyl)ketone, bis(4-hydroxyphenyl)ether, 2,2-bis(3,5-dibromo-4-hydroxyphenyl)propane, and combinations thereof.

10. The polycarbonate resin composition according to claim 1 , wherein, in the copolymerized polycarbonate resin, the repeat unit represented by Formula 1 is present in an amount of about 5 mol % to about 45 mol %, and wherein the polycarbonate resin composition has a scratch width of 270 μm or less as measured by Ball Scratch Profile (BSP) test.

11. The polycarbonate resin composition according to claim 10 , wherein the polycarbonate resin composition has a pencil hardness rating from H to 3H.

12. The polycarbonate resin composition according to claim 10 , wherein, in the copolymerized polycarbonate resin, the repeat unit represented by Formula 2 is present in an amount of about 50 mol % to about 95 mol %, and wherein the copolymerized polycarbonate resin further optionally comprises a repeat unit represented by Formula 3:

wherein R 3 and R 4 are the same or different and are each independently substituted or unsubstituted C 1 to C 6 alkyl, and m and n are the same or different and are each independently an integer from 0 to 4, in an amount of 0 to about 30 parts by mole based on about 100 parts by mole of the repeat units represented by Formulae 1 and 2.

Assignees

• Cheil Ind Inc

Inventors

• Hur Jong Chan
• Chi Jun Ho
• Lee Dong Geun
• Chei Woo Suk

Classifications

• C08K5/0066

  Flame-proofing or flame-retarding additives · CPC title

• C08L69/00 Primary

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

• C08K5/523

  with hydroxyaryl compounds · CPC title