Polycarbonate-based resin composition and molded article thereof

Patent metadata

Field	Value
Publication number	US-10081730-B2
Application number	US-201515517136-A
Country	US
Kind code	B2
Filing date	Dec 3, 2015
Priority date	Dec 4, 2014
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

The present invention relates to a polycarbonate-based resin composition and a molded article thereof, and more specifically, to a polycarbonate-based resin composition exhibiting high fluidity and excellent chemical resistance and impact resistance, and a molded article formed therefrom.

First claim

The invention claimed is:

1. A polycarbonate-based resin composition comprising:
a polycarbonate resin including an aromatic polycarbonate-based first repeating unit,
a copolycarbonate resin including an aromatic polycarbonate-based first repeating unit, and an aromatic polycarbonate-based second repeating unit having one or more siloxane bonds,
an impact-reinforcing agent including a rubber-modified vinyl-based graft copolymer, and
a flow modifier including a thermoplastic polyester-based polymer or a phosphoric acid ester-based compound;
wherein the first repeating unit each independently includes a repeating unit represented by Chemical Formula 1 below, and;
the second repeating unit includes at least one repeating unit selected from the group consisting of Chemical Formula 3 below:

in Chemical Formula 1,
R 1 to R 4 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen, and
Z is C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2 , or CO;

in Chemical Formula 3,
X 2 is each independently C 1-10 alkylene,
Y 1 is each independently hydrogen, C 1-6 alkyl, halogen, hydroxy, C 1-6 alkoxy or C 6-20 aryl,
R 6 is each independently: hydrogen; C 1-15 alkyl unsubstituted or substituted with oxiranyl; oxiranyl-substituted C 1-10 alkoxy; halogen; C 1-10 alkoxy; allyl; C 1-10 haloalkyl; or C 6-20 aryl, and
n2 is an integer of 10 to 200.

2. The polycarbonate-based resin composition of claim 1 , wherein: the polycarbonate resin has a melt index (MI) of 5 g/10 min to 50 g/10 min at a temperature of 300° C. and under a load of 1.2 kg.

3. The polycarbonate-based resin composition of claim 1 , wherein: the second repeating unit further includes at least one repeating unit selected from the group consisting of Chemical Formula 2 below:

in Chemical Formula 2,
X 1 is each independently C 1-10 alkylene,
R 5 is each independently: hydrogen; C 1-15 alkyl unsubstituted or substituted with oxiranyl; oxiranyl-substituted C 1-10 alkoxy; halogen; C 1-10 alkoxy; allyl; C 1-10 haloalkyl; or C 6-20 aryl, and
n1 is an integer of 10 to 200.

4. The polycarbonate-based resin composition of claim 1 , wherein: the repeating unit represented by Chemical Formula 1 is represented by Chemical Formula 1-1:

5. The polycarbonate-based resin composition of claim 3 , wherein: the repeating unit represented by Chemical Formula 2 is represented by Chemical Formula 2-1:

in Chemical Formula 2-1,
R 5 and n1 are each the same as defined in Chemical Formula 2.

6. The polycarbonate-based resin composition of claim 1 , wherein: the repeating unit represented by Chemical Formula 3 is represented by Chemical Formula 3-1:

in Chemical Formula 3-1,
R6 and n2 are each the same as defined in Chemical Formula 3.

7. The polycarbonate-based resin composition of claim 1 , wherein: the copolycarbonate resin includes 90 to 99.999 wt % of the first repeating unit and 0.001 to 10 wt % of the second repeating unit.

8. The polycarbonate-based resin composition of claim 1 , wherein: the polycarbonate resin and the copolycarbonate resin each have a weight average molecular weight of 1,000 to 100,000 g/mol.

9. The polycarbonate-based resin composition of claim 1 , wherein: the rubber-modified vinyl-based graft copolymer is a graft copolymer having a core-shell structure in which a vinyl-based unsaturated monomer is grafted to a core structure to form a shell,
the core structure including at least one rubber selected from the group consisting of diene-based rubber, acrylate-based rubber, and silicone-based rubber.

10. The polycarbonate-based resin composition of claim 1 , wherein: the thermoplastic polyester-based polymer includes at least one polyester-based polymer selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, and polycyclohexane terephthalate modified with ethylene glycol.

11. The polycarbonate-based resin composition of claim 1 , wherein:
the phosphoric acid ester-based compound includes at least one compound selected from the group consisting of triphenyl phosphate, bisphenol A diphenyl phosphate, and resorcinol diphenyl phosphate.

12. The polycarbonate-based resin composition of claim 1 , wherein:
the polycarbonate-based resin composition includes:
40 to 90 wt % of the polycarbonate resin,
5 to 50 wt % of the copolycarbonate resin,
1 to 10 wt % of the impact-reinforcing agent, and
0.5 to 15 wt % of the flow modifier.

13. A molded article comprising the polycarbonate-based resin composition of claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Lee Ryul
• Lee Su Kyoung
• Kim Min Ji
• Lee Jong Hyun
• Ahn Sung Tae

Classifications

• C09K21/08

  containing halogen · CPC title

• C08G77/38

  Polysiloxanes modified by chemical after-treatment · CPC title

• C08L2201/10

  Transparent films; Clear coatings; Transparent materials · CPC title

• C08G64/24

  and phenols · CPC title

• C08K7/14

  Glass · CPC title