Thermoplastic resin composition for laser direct structuring and molded article comprising the same

Patent metadata

Field	Value
Publication number	US-9890281-B2
Application number	US-201514977895-A
Country	US
Kind code	B2
Filing date	Dec 22, 2015
Priority date	Dec 24, 2014
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A thermoplastic resin composition for laser direct structuring and a molded article including the same. The thermoplastic resin composition includes: (A) a thermoplastic resin; (B) a laser direct structuring additive; and (C) an olefin copolymer.

First claim

What is claimed is:

1. A thermoplastic resin composition for laser direct structuring, comprising: (A) a thermoplastic resin; (B) a laser direct structuring additive; (C) an olefin copolymer, and (D) inorganic fillers,
wherein the olefin copolymer (C) is present in an amount of about 1 part by weight to about 20 parts by weight based on about 100 parts by weight of the thermoplastic resin (A), the laser direct structuring additive (B), and the inorganic fillers (D).

2. The thermoplastic resin composition according to claim 1 , comprising: about 60 wt % to about 95 wt % of the thermoplastic resin (A), about 1 wt % to about 20 wt % of the laser direct structuring additive (B), and about 1 wt % to about 35 wt % of the inorganic fillers (D), each based on the total weight of (A)+(B)+(D).

3. The thermoplastic resin composition according to claim 1 , wherein a weight ratio of the laser direct structuring additive (B) to the inorganic fillers (D) ranges from about 1:1 to about 1:6.

4. The thermoplastic resin composition according to claim 1 , wherein the olefin copolymer (C) is a graft copolymer having a polyolefin backbone.

5. The thermoplastic resin composition according to claim 4 , wherein the olefin copolymer (C) includes a functional group grafted onto the polyolefin backbone, the functional group comprising a (meth)acrylate group, a modified ester group, an arylate group, an acrylonitrile group, or a combination thereof.

6. The thermoplastic resin composition according to claim 4 , wherein the polyolefin backbone comprises polyethylene, polypropylene, or an ethylene-propylene copolymer.

7. The thermoplastic resin composition according to claim 5 , wherein the functional group is present in an amount of about 5 wt % to about 50 wt % based on the total weight of the olefin copolymer (C).

8. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin (A) comprises a polycarbonate resin, a polyester resin, a polyamide resin, a polyarylene ether resin, a polyphenylene oxide resin, a polystyrene resin, or a combination thereof.

9. The thermoplastic resin composition according to claim 1 , wherein the laser direct structuring additive (B) comprises a metal oxide.

10. The thermoplastic resin composition according to claim 9 , wherein the metal oxide comprises a copper-containing metal oxide, a zinc-containing metal oxide, a tin-containing metal oxide, a magnesium-containing metal oxide, an aluminum-containing metal oxide, a gold-containing metal oxide, a silver-containing metal oxide, a cadmium-containing metal oxide, a manganese-containing metal oxide, a nickel-containing metal oxide, a cobalt-containing metal oxide, a titanium-containing metal oxide, an iron-containing metal oxide, a chromium-containing metal oxide, or a combination thereof.

11. The thermoplastic resin composition according to claim 1 , wherein the laser direct structuring additive (B) comprises a material having a spinel structure.

12. The thermoplastic resin composition according to claim 1 , wherein the inorganic fillers (D) are glass fibers having a cross-sectional aspect ratio of less than about 4.0.

13. A molded article comprising the thermoplastic resin composition according to claim 1 .

14. The molded article according to claim 13 , wherein the molded article has an Izod impact strength (⅛″ Notched) of about 20 kgf·cm/cm to about 60 kgf·cm/cm, as measured in accordance with ASTM D256, and a melt flow index (250° C., 10 kg) of about 20 g/10 min to about 60 g/10 min, as measured in accordance with ASTM D1238.

15. The molded article according to claim 13 , wherein the molded article has a fogging index of about 0.8 or less, as calculated according to Equation 1:
Fogging index (FI)=( W 1/ W 0)×100   [Equation 1 ]

wherein W1 is the weight of unreacted monomers and oligomers deposited on a lid after placing 10 g of the thermoplastic resin composition according to any one of claims 1 to 11 in a soda-lime petri dish having a diameter of about 55 mm, putting a lid on the dish and sealing the dish, and leaving the dish at 270° C. for about 180 minutes; and WO is the initial weight of the thermoplastic resin composition according to any one of claims 1 to 11 .

16. The molded article according to claim 13 , wherein the molded article has a plated pattern formed on the entirety or part of a surface thereof.

17. A method for manufacturing a molded article, comprising:
preparing a preform by molding the thermoplastic resin composition according to claim 1 ;
forming a pattern area by irradiating a surface of the preform with laser beams; and
forming a plated pattern on the pattern area by plating the preform with the pattern area formed thereon.

18. The thermoplastic resin composition according to claim 1 , wherein a molded article comprising the thermoplastic resin composition has an Izod impact strength (⅛″ Notched) of about 20 kgf·cm/cm to about 60 kgf·cm/cm, as measured in accordance with ASTM D256; a melt flow index (250° C., 10 kg) of about 20 g/10 min to about 60 g/10 min, as measured in accordance with ASTM D1238; and a fogging index of about 0.8 or less, as calculated according to Equation 1:
Fogging index (FI)=( W 1/ W 0)×100   [Equation 1 ]

wherein W1 is the weight of unreacted monomers and oligomers deposited on a lid after placing 10 g of the thermoplastic resin composition in a soda-lime petri dish having a diameter of about 55 mm, putting a lid on the dish and sealing the dish, and leaving the dish at 270° C. for about 180 minutes; and W0 is the initial weight of the thermoplastic resin composition.

19. The thermoplastic resin composition according to claim 18 , wherein a molded article comprising the thermoplastic resin composition has a melt flow index of 24 g/10 min to 35 g/10 min and a fogging index of about 0.1 to about 0.3.

20. The thermoplastic resin composition according to claim 19 , comprising: about 65 wt % to about 85 wt % of the thermoplastic resin (A), about 1 wt % to about 10 wt % of the laser direct structuring additive (B), about 5 wt % to about 30 wt % of the inorganic fillers (D), each based on the total weight of (A)+(B)+(D), and about 3 to about 10 parts by weight of the olefin copolymer (C) based on about 100 parts by weight of (A)+(B)+(D).

21. The thermoplastic resin composition according to claim 20 , wherein the thermoplastic resin (A) comprises a polycarbonate resin, the laser direct structuring additive (B) comprises a copper-containing metal oxide and/or a chromium-containing metal oxide having a spinel structure; the inorganic fillers (D) comprises glass fibers; and the olefin copolymer (C) comprises a graft copolymer having a polyolefin backbone and a (meth)acrylate functional group grafted onto the polyolefin backbone.

Assignees

• Samsung Sdi Co Ltd
• Lotte Advanced Mat Co Ltd

Inventors

• Jung Yoo Jin
• Woo Eun Taek
• Kim Jung Ki
• Park Na Ri
• Hong Sang Hyun

Classifications

• C08L2205/16

  Fibres; Fibrils · CPC title

• H05K3/182

  characterised by the patterning method · CPC title

• C08L23/0846

  with unsaturated hydrocarbons containing atoms other than carbon or hydrogen · CPC title

• C08L69/00 Primary

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

• C08L2207/04

  Thermoplastic elastomer · CPC title