Plating performance using combination metal oxide and metal powder as additives
View Patent ↗The present disclosure relates to blended thermoplastic compositions comprising: a) from about 20 wt % to about 80 wt % of a polycarbonate polymer component; b) from about 5 wt % to about 30 wt % of a polycarbonate-polysiloxane copolymer component; c) from about 1 wt % to about 20 wt % of a laser direct structuring additive component; and d) from about 0.02 wt % to about 5 wt % of a metal component; wherein the combined weight percent value of all components does not exceed about 100 wt %; and wherein all weight percent values are based on the total weight of the composition.
1. A blended thermoplastic composition comprising:
a. from about 55.5 wt % to about 80 wt % of a polycarbonate polymer component, wherein the polycarbonate polymer component comprises repeating units derived from bisphenol A;
b. from about 5 wt % to about 30 wt % of a polycarbonate-polysiloxane copolymer component;
c. from about 1 wt % to about 12.5 wt % of a laser direct structuring additive component, wherein the laser direct structuring additive component comprises copper hydroxide phosphate, copper phosphate, copper chromium oxide spinel, or a combination thereof; and
d. from about 0.02 wt % to about 2 wt % of a metal, wherein the metal is selected from Cu, or a combination thereof;
wherein the combined weight percent value of all components does not exceed about 100 wt %, and wherein all weight percent values are based on a total weight of the composition.
2. The blended thermoplastic composition of claim 1 , wherein the blended thermoplastic composition is capable of being plated.
3. The blended thermoplastic composition of claim 1 , wherein the blended thermoplastic composition has a plating index from about 0.7 to about 2.0 when determined in accordance with ASTM B568.
4. The blended thermoplastic composition of claim 1 , wherein the polycarbonate polymer component has a weight average molecular weight from about 15,000 to about 50,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards.
5. The blended thermoplastic composition of claim 1 , wherein the polycarbonate component comprises a first polycarbonate polymer component and a second polycarbonate polymer component.
6. The blended thermoplastic composition of claim 5 , wherein the first polycarbonate polymer component has a melt volume flow rate (MVR) of at least about 20 grams/10 minutes when measured at 300° C. and under a load of 1.2 kg according to ASTM D1238.
7. The blended thermoplastic composition of claim 5 , wherein the first polycarbonate polymer component has a melt volume flow rate (MVR) of at least about 22 grams/10 minutes when measured at 300° C. and under a load of 1.2 kg according to ASTM D1238.
8. The blended thermoplastic composition of claim 5 , wherein the first polycarbonate polymer component has a melt volume flow rate (MVR) from about 17 grams/10 minutes to about 32 grams/10 minutes when measured at 300° C. and under a load of 1.2 kg according to ASTM D1238.
9. The blended thermoplastic composition of claim 5 , wherein the first polycarbonate polymer component has a weight average molecular weight from about 18,000 to about 40,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards.
10. The blended thermoplastic composition of claim 5 , wherein the second polycarbonate polymer component has a melt volume flow rate (MVR) of at least about 3.0 grams/10 minutes when measured at 300° C. and under a load of 1.2 kg according to ASTM D1238.
11. The blended thermoplastic composition of claim 5 , wherein the second polycarbonate polymer component has a melt volume flow rate (MVR) from about 4.0 grams/10 minutes to about 8.0 grams/10 minutes when measured at 300° C. and under a load of 1.2 kg according to ASTM D1238.
12. The blended thermoplastic composition of claim 5 , wherein the second polycarbonate polymer component has a weight average molecular weight from about 18,000 to about 40,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards.
13. The blended thermoplastic composition of claim 1 , wherein the polycarbonate-polysiloxane copolymer component comprises repeating units derived from BPA.
14. The blended thermoplastic composition of claim 1 , wherein the polycarbonate-polysiloxane copolymer component comprises dimethylsiloxane repeating units.
15. The blended thermoplastic composition of claim 1 , additionally comprising one or more additives selected from anti-drip agent, antioxidant, antistatic agent, chain extender, colorant, de-molding agent, dye, flow promoter, flow modifier, light stabilizer, lubricant, mold release agent, pigment, quenching agent, thermal stabilizer, UV absorbent substance, UV reflectant substance, and UV stabilizer.
16. An article comprising any of the compositions of claim 1 .
17. The blended thermoplastic composition of claim 1 , wherein a molded article comprising the blended thermoplastic composition has a plating index of about 0.7 to about 2.0.
18. The blended thermoplastic composition of claim 1 , wherein the blended thermoplastic composition comprises about 0.1 wt % to about 1 wt % of the metal.