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

Patent metadata

Field	Value
Publication number	US-11312832-B2
Application number	US-201816215757-A
Country	US
Kind code	B2
Filing date	Dec 11, 2018
Priority date	Dec 12, 2017
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

A thermoplastic resin composition and a molded article including the same. The thermoplastic resin composition includes: about 100 parts by weight of a thermoplastic resin; about 1 to about 30 parts by weight of an additive for laser direct structuring (LDS additive); about 0.01 to about 5 parts by weight of a hindered phenol-based compound; about 0.01 to about 10 parts by weight of a sodium phosphate salt; about 0.01 to about 5 parts by weight of a phosphite compound; about 0.01 to about 5 parts by weight of a sulfonate compound; and about 0.01 to about 10 parts by weight of a metal oxide, wherein a weight ratio of the hindered phenol-based compound, the sodium phosphate salt, the phosphite compound and the sulfonate compound to the metal oxide may range from about 2:1 to about 10:1. The thermoplastic resin composition has good properties in terms of plating reliability and thermal stability (discoloration resistance) and can secure good injection molding stability by suppressing gas generation upon injection molding.

First claim

What is claimed is:

1. A thermoplastic resin composition comprising:
about 100 parts by weight of a thermoplastic resin;
about 1 to about 30 parts by weight of an additive for laser direct structuring (LDS) additive;
about 0.01 to about 5 parts by weight of a hindered phenol-based compound;
about 0.01 to about 10 parts by weight of a sodium phosphate salt;
about 0.01 to about 5 parts by weight of a phosphite compound;
about 0.01 to about 5 parts by weight of a sulfonate compound; and
about 0.01 to about 10 parts by weight of a metal oxide,
wherein a weight ratio of the hindered phenol-based compound, the sodium phosphate salt, the phosphite compound and the sulfonate compound to the metal oxide ranges from about 2:1 to about 10:1.

2. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin comprises a polycarbonate resin, a rubber-modified aromatic vinyl-based resin, a polyester resin, a polyamide resin, and/or a polyarylene ether resin.

3. The thermoplastic resin composition according to claim 1 , wherein the LDS additive comprises a heavy metal composite oxide spinel and/or a copper salt.

4. The thermoplastic resin composition according to claim 1 , wherein the metal oxide comprises magnesium oxide, zinc oxide, calcium oxide, and/or aluminum oxide.

5. The thermoplastic resin composition according to claim 1 , further comprising: inorganic fillers.

6. The thermoplastic resin composition according to claim 5 , wherein the inorganic fillers comprise glass fibers, talc, wollastonite, whisker, silica, mica, and/or basalt fibers.

7. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition allows about 90 grid-lattices or more to remain without being peeled off when a tape is attached to and is then detached from an injection-molded specimen having a size of 50 mm×90 mm×3.2 mm after aging the specimen at 25° C. for 6 hours, activating a surface of the specimen in stripe form through laser direct structuring, forming a 35 nm thick copper layer on the activated surface of the specimen through plating (copper electroless plating), leaving the specimen in a chamber under conditions of 85° C. and 85% RH for 72 hours, and carving 100 grid-lattices each having a size of 1 mm×1 mm on the plating layer (copper layer).

8. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition has a color variation (ΔE) of about 4 or less, as calculated according to Equation 1:
Color variation (Δ E )=√{square root over ((Δ L *) 2 +(Δ a *) 2 +(Δ b *) 2 )}  [Equation 1]

where ΔL* is a difference (L 1 *−L 0 *) between L* values before/after exposure; Δa* is a difference (a 1 *−a 0 *) between a* values before/after exposure; and Δb* is a difference (b 1 *−b 0 *) between b* values before/after exposure, in which L 0 *, a 0 * and b 0 * are initial color values, as measured on an injection molded specimen having a size of 50 mm×90 mm×3.2 mm using a color difference meter, and L 1 *, a 1 * and b 1 * are color values, as measured on the specimen by the same method after exposure under conditions of 280° C. for 10 minutes.

9. A molded article formed of the thermoplastic resin composition according to claim 1 .

10. The molded article according to claim 9 , comprising: a metal layer formed on at least a portion of a surface thereof through laser direct structuring and plating.

Assignees

• Lotte Advanced Mat Co Ltd

Inventors

• Park Jee Kwon
• Kim Ik Mo
• Kim Nam Hyun
• Kim Jung Ki
• Hong Sang Hyun

Classifications

• C08K3/32 Primary

  Phosphorus-containing compounds · CPC title

• C08L69/00

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

• C08K2003/328

  Phosphates of heavy metals · CPC title

• C08K3/22

  of metals · CPC title

• C08K2003/324

  Alkali metal phosphate · CPC title