Polycarbonate resin composition and molded article using the same

Patent metadata

Field	Value
Publication number	US-9771476-B2
Application number	US-201615133510-A
Country	US
Kind code	B2
Filing date	Apr 20, 2016
Priority date	Apr 24, 2015
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

A polycarbonate resin composition and a molded article manufactured using the same. The polycarbonate resin composition includes: (A) a polycarbonate resin; (B) a vinyl cyanide compound-aromatic vinyl compound copolymer; (C) an acrylonitrile-butadiene-styrene graft copolymer including (C-1) a first acrylonitrile-butadiene-styrene graft copolymer, a rubbery polymer of which has an average particle diameter of about 200 nm to about 350 nm and (C-2) a second acrylonitrile-butadiene-styrene graft copolymer, a rubbery polymer of which has an average particle diameter of about 400 nm to about 600 nm; and (D) a compatibilizer.

First claim

What is claimed is:

1. A polycarbonate resin composition comprising:
(A) about 45 wt % to about 75 wt % of a polycarbonate resin;
(B) about 10 wt % to about 40 wt % of a vinyl cyanide compound-aromatic vinyl compound copolymer;
(C) about 10 wt % to about 25 wt % of an acrylonitrile-butadiene-styrene graft copolymer comprising (C-1) a first acrylonitrile-butadiene-styrene graft copolymer, a rubbery polymer of which has an average particle diameter of about 200 nm to about 350 nm and (C-2) a second acrylonitrile-butadiene-styrene graft copolymer, a rubbery polymer of which has an average particle diameter of about 400 nm to about 600 nm; and
(D) about 3 wt % to about 9 wt % of a compatibilizer,
wherein the acrylonitrile-butadiene-styrene graft copolymer (C) comprises the first acrylonitrile-butadiene-styrene graft copolymer (C-1) and the second acrylonitrile-butadiene-styrene graft copolymer (C-2) in a weight ratio of about 1:0.1 to about 1:0.7.

2. The polycarbonate resin composition according to claim 1 , wherein, in the vinyl cyanide compound-aromatic vinyl compound copolymer (B), the vinyl cyanide compound comprises acrylonitrile, methacrylonitrile, fumaronitrile, or a combination thereof.

3. The polycarbonate resin composition according to claim 1 , wherein, in the vinyl cyanide compound-aromatic vinyl compound copolymer (B), the aromatic vinyl compound comprises styrene, α-methylstyrene, halogen or alkyl-substituted styrene, or a combination thereof.

4. The polycarbonate resin composition according to claim 1 , wherein the vinyl cyanide compound-aromatic vinyl compound copolymer (B) is a styrene-acrylonitrile copolymer (SAN).

5. The polycarbonate resin composition according to claim 1 , wherein the vinyl cyanide compound-aromatic vinyl compound copolymer (B) is copolymerized from a mixture of an aromatic vinyl compound and a vinyl cyanide compound, wherein the mixture includes the aromatic vinyl compound in an amount of about 60 wt % to about 80 wt %, based on the total weight of the mixture.

6. The polycarbonate resin composition according to claim 1 , wherein the vinyl cyanide compound-aromatic vinyl compound copolymer (B) has a weight average molecular weight of about 70,000 g/mol to about 400,000 g/mol.

7. The polycarbonate resin composition according to claim 1 , comprising the second acrylonitrile-butadiene-styrene graft copolymer (C-2) in an amount of about 1 wt % to about 10 wt % based on the total weight of the polycarbonate resin composition.

8. The polycarbonate resin composition according to claim 1 , wherein the compatibilizer (D) is a copolymer of a (meth)acrylic compound and a compound copolymerizable with the (meth)acrylic compound.

9. The polycarbonate resin composition according to claim 1 , wherein the compatibilizer (D) comprises a copolymer of ethyl acrylate and methyl methacrylate.

10. The polycarbonate resin composition according to claim 9 , wherein the compatibilizer (D) comprises a (meth)acrylic copolymer copolymerized from a mixture including about 30 wt % to about 70 wt % of ethyl acrylate and about 70 wt % to about 30 wt % of methyl methacrylate.

11. A molded article manufactured from the polycarbonate resin composition according to claim 1 .

12. The polycarbonate resin composition according to claim 1 , wherein a molded article manufactured from the polycarbonate resin composition has a notched Izod impact strength at room temperature of 60 to 65 kgf·cm/cm measured in accordance with ASTM D256.

13. The polycarbonate resin composition according to claim 12 , wherein a molded article manufactured from the polycarbonate resin composition has a notched Izod impact strength at −30° C. of 12 to 20 kgf·cm/cm measured in accordance with ASTM D256.

14. The polycarbonate resin composition according to claim 13 , wherein the acrylonitrile-butadiene-styrene graft copolymer (C) comprises the first acrylonitrile-butadiene-styrene graft copolymer (C-1) and the second acrylonitrile-butadiene-styrene graft copolymer (C-2) in a weight ratio of about 1:0.1 to 1:0.4.

Assignees

• Samsung Sdi Co Ltd
• Lotte Advanced Mat Co Ltd

Inventors

• Kim In Chol
• Park Jung Woo
• Kwon Kee Hae
• Hong Chang Min

Classifications

• C08L69/00 Primary

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

• C08L25/12

  with unsaturated nitriles · CPC title

• C08L55/02

  ABS [Acrylonitrile-Butadiene-Styrene] polymers · CPC title

• C08L33/12

  Homopolymers or copolymers of methyl methacrylate · CPC title