Polycarbonate-based thermoplastic resin composition and product using same

Patent metadata

Field	Value
Publication number	US-10066038-B2
Application number	US-201515526795-A
Country	US
Kind code	B2
Filing date	Jun 25, 2015
Priority date	Nov 14, 2014
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

Disclosed are a thermoplastic resin composition which, through combination of certain compatibilizers, satisfies high-gloss and high-impact properties, does not generate weld lines and flow marks, and furthermore, has appropriate impact strength and can sufficiently satisfy scratch resistance required for adoption in actual products, and a product using the same. The present invention provides a polycarbonate-based thermoplastic resin composition including 5-28 wt % of a polycarbonate thermoplastic resin; 55-80 wt % of a polymethylmethacrylate copolymer; 1-20 wt % of a styrene-acrylonitrile copolymer; and 1-20 wt % of a styrene-methylmethacrylate-butyl-acrylate copolymer, and a product using the same.

First claim

The invention claimed is:

1. A polycarbonate-based thermoplastic resin composition comprising:
12-18 wt % of a polycarbonate thermoplastic resin;
62-68 wt % of a polymethylmethacrylate;
7-13 wt % of a styrene-acrylonitrile copolymer; and
7-13 wt % of a styrene-methylmethacrylate-butyl-acrylate copolymer,
wherein a mass-average molecular weight of the polycarbonate thermoplastic resin is 33,000-40,000, and
wherein the polycarbonate-based thermoplastic resin composition is configured for automobile non-coating exterior materials, and has an IZOD impact strength of at least 6.4 kg·cm/cm and a pencil hardness of at least 2H.

2. The polycarbonate-based thermoplastic resin composition of claim 1 , wherein the resin melt flow rate (MFR, 230° C., 3.8 kgf) of the polymethylmethacrylate is 0.1-25 g/10 min.

3. The polycarbonate-based thermoplastic resin composition of claim 1 , wherein the acrylonitrile content of the styrene-acrylonitrile copolymer is 15-40 wt %.

4. The polycarbonate-based thermoplastic resin composition of claim 1 , wherein the butyl-acrylate content of the styrene-methylmethacrylate-butyl-acrylate copolymer is 10-60 wt %.

5. A product comprising the polycarbonate-based thermoplastic resin composition according to claim 1 .

6. A product comprising the polycarbonate-based thermoplastic resin composition according to claim 2 .

7. A product comprising the polycarbonate-based thermoplastic resin composition according to claim 4 .

Assignees

• Lotte Chemical Corp

Inventors

• Baek Woonseon
• Kim Kyungtae
• Heo Jaejoon
• Kim Myungwook

Classifications

• C08L25/12

  with unsaturated nitriles · 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

• C08F2500/12

  Melt flow index or melt flow ratio · CPC title

• C08F212/10 Primary

  with nitriles · CPC title