High modulus laser direct structuring polycarbonate composites with enhanced plating performance and broad laser window and methods for the manufacture and use thereof
View Patent ↗The present disclosure relates to a polymer composition. The disclosed composition comprises a polycarbonate polymer, a laser direct structuring additive capable of being activated by electromagnetic radiation and thereby forming elemental metal nuclei, reinforcing filler, and a laser direct structuring synergist. Also disclosed is a method for making the disclosed polymer composition and an article of manufacture comprising the disclosed polymer composition.
1. A polymer composition comprising:
a. from about 20% by weight to about 84% by weight of a polycarbonate polymer;
b. from about 1% by weight to about 10% by weight of a laser direct structuring additive capable of being activated by electromagnetic radiation to form an elemental metal nuclei;
c. from about 10% by weight to about 50% by weight of a reinforcing filler; and
d. from about 5% by weight to about 20% by weight of a laser direct structuring synergist comprising a polycarbonate-polysiloxane copolymer, a branched polycarbonate, or a combination thereof, and
wherein
the polymer composition has an enhanced laser plating efficiency of at least 10% relative to a substantially identical reference composition in the absence of the laser direct structuring synergist,
a molded article formed from the polymer composition has a notched Izod impact energy at 23° C. of from about 100 J/m to about 165 J/m,
the polymer composition is capable of being plated after being activated using a laser, and
weight percentages are relative to total weight of the polymer composition.
2. The polymer composition of claim 1 , wherein the laser direct structuring additive comprises a heavy metal mixture oxide spinel, a copper salt, or a combination thereof.
3. The polymer composition of claim 2 , wherein the heavy metal mixture oxide spinel comprises a copper chromium oxide spinel.
4. The polymer composition of claim 2 , wherein the copper salt comprises a copper hydroxide phosphate.
5. The polymer composition of claim 1 , wherein the reinforcing filler comprises a glass fiber, a mineral filler, a carbon fiber, or a combination thereof.
6. The polymer composition of claim 1 , further comprising talc in an amount from about 1% by weight to about 5% by weight relative to the total weight of the polymer composition.
7. The polymer composition of claim 1 , further comprising one or more additional additives comprising an antioxidant, an impact modifier, a flame retardant, an inorganic filler, a stabilizer, or a combination thereof.
8. The polymer composition of claim 1 , wherein the polymer composition is capable of being molded into an article.
9. The polymer composition of claim 1 , wherein the polymer composition demonstrates a flexural modulus in an amount equal to or greater than about 3 GPa.
10. The polymer composition of claim 1 , wherein the polymer composition demonstrates a tensile modulus in an amount equal to or greater than about 3 GPa.
11. The polymer composition of claim 1 , wherein the polymer composition is capable of having a plating index value with a statistical variance of at least about 2 to about 75% lower than that measured for a substantially identical reference composition in the absence of the laser direct structuring synergist.
12. The polymer composition of claim 1 , wherein the polymer composition is capable of having a plating index value with a statistical variance of at least about 9 to about 30% lower than that measured for a substantially identical reference composition in the absence of the laser direct structuring synergist.
13. A method for making a molded article, comprising:
1. forming a blend composition comprising
a. from about 20% by weight to about 84% by weight of a polycarbonate polymer,
b. from about 1% by weight to about 10% by weight of a laser direct structuring additive capable of being activated by electromagnetic radiation to form an elemental metal nuclei,
c. from about 10% by weight to about 50% by weight of a reinforcing filler, and
d. from about 5% by weight to about 20% by weight of a laser direct structuring synergist comprising a polycarbonate-polysiloxane copolymer, a branched polycarbonate, or a combination thereof,
2. forming the molded article from the blend composition; and
3. subjecting the molded article to a laser direct structuring process,
wherein
the polymer composition has an enhanced laser plating efficiency of at least 10% relative to a substantially identical reference composition in the absence of the laser direct structuring synergist,
the molded article has a notched Izod impact energy at 23° C. of from about 100 J/m to about 165 J/m,
the polymer composition is capable of being plated after being activated using a laser, and
weight percentages are relative to total weight of the polymer composition.
14. The method of claim 13 , wherein the polycarbonate polymer comprises a bisphenol A polycarbonate polymer.
15. The method of claim 14 , wherein the bisphenol A polycarbonate polymer comprises a blend of at least two different bisphenol A polycarbonates.
16. The method of claim 13 , wherein the laser direct structuring additive comprises a heavy metal mixture oxide spinel, a copper salt, or a combination thereof.
17. The method of claim 13 , wherein the reinforcing filler comprises a glass fiber, a mineral filler, a carbon fiber, or a combination thereof.
18. The method of claim 13 , wherein the blend composition demonstrates a flexural modulus in an amount equal to or greater than about 3 GPa.
19. The method of claim 13 , wherein the blend composition demonstrates a tensile modulus in an amount equal to or greater than about 3 GPa.
20. The method of claim 13 , wherein the blend composition is capable of having a plating index value with a statistical variance of at least about 2 to about 75% lower than that measured for a substantially identical reference composition in the absence of the laser direct structuring synergist.
21. The method of claim 13 , wherein the blend composition is capable of having a plating index value with a statistical variance of at least about 9 to about 30% lower than that measured for a substantially identical reference composition in the absence of the laser direct structuring synergist.
22. An article molded from a polymer composition comprising:
a. from about 20% by weight to about 84% by weight of a polycarbonate polymer;
b. from about 1% by weight to about 10% by weight of a laser direct structuring additive capable of being activated by electromagnetic radiation to form an elemental metal nuclei;
c. from about 10% by weight to about 50% by weight of a reinforcing filler; and
d. from about 5% by weight to about 20% by weight of a laser direct structuring synergist comprising a polycarbonate-polysiloxane copolymer, a branched polycarbonate, or a combination thereof; and
wherein
the article has an enhanced laser plating efficiency of at least 10% relative to a substantially identical article in the absence of the laser direct structuring synergist,
the article has a notched Izod impact energy at 23° C. of from about 100 J/m to about 165 J/m,
the article is capable of being plated after being activated using a laser, and
weight percentages are relative to total weight of the polymer composition.
23. The article of claim 22 , wherein the article comprises a computer device, a household appliance, a decoration device, an electromagnetic interference device, a printed circuit, a Wi-Fi device, a Bluetooth device, a GPS device, a cellular antenna device, a smart phone device, an automotive device, a military device, an aerospace device, a medical device, a hearing aid, a sensor device, a security device, a shielding device, an RF antenna device, or an RFID device.
24. The polymer composition of claim 1 , wherein the polymer composition has an enhanced laser plating efficiency of at least 20% relative to a substantially identical reference composition in the absence of the laser direct structuring synergist.
25. The polymer composition of claim 1 , wherein the polymer composition has an enhanced laser plating efficiency of at least 30% relative to a substantially identical reference composition in the absence of the laser direct structuring synergist.
26. The method of claim 13 , wherein the polymer composition has an enhanced laser plating efficiency of at least 20% relative to a substantially identical reference composition in the absence of the laser direct structuring synergist.
27. The method of claim 13 , wherein the polymer composition has an enhanced laser plating efficiency of at least 30% relative to a substantially identical reference composition in the absence of the laser direct structuring synergist.
28. The article of claim 22 , further comprising a laser-activated conductive path, wherein the laser-activated conductive path is formed by activation with a laser.
29. The article of claim 28 , further comprising a metal layer plated onto the laser-activated conductive path.