Resin composition for high frequency electronic components
Disclosed are resin compositions that include poly(arylene ether), HIPS/GPPS), impact modifier, and ceramic filer that provide various Dk values while maintaining Df at a very low level. The compositions also possess excellent mechanical and processing performance, for example, superior high impact strength and good ductility, compared to prior art compositions. The compositions can be used to form components of wireless electronic communications devices in order to ensure a low degree of signal attenuation.
1. A resin composition comprising:
(a) 40-90% by weight of a poly(arylene ether);
(b) 0-40% by weight of high-impact polystyrene (HIPS) and 0-40% by weight of general-purpose polystyrene (GPPS), provided that the HIPS, the GPPS, or the combination thereof represents 5-40% by weight of said composition;
(c) 5-25% by weight of an impact modifier; and,
(d) 15-400% by weight of a ceramic filler, as measured per 100 parts by weight of components (a)-(c),
wherein components (a)-(c) are each expressed relative to the total weight of components (a)-(c), and
wherein the resin composition exhibits a Df value of 8.7 e-4 to 1.2 e-3 when evaluated at 1.1 GHz using a split post dielectric resonator on a minimum sample size of 120 millimeter (mm) by 120 mm and a maximum sample thickness of 6 mm.
2. The resin composition according to claim 1 wherein the poly(arylene ether) is poly(p-phenylene oxide).
3. The resin composition according to claim 1 comprising about 50-75% by weight of the poly(arylene ether).
4. The resin composition according to claim 1 comprising no HIPS.
5. The resin composition according to claim 4 comprising 10-30% by weight of GPPS.
6. The resin composition according to claim 1 comprising no GPPS.
7. The resin composition according to claim 6 comprising 10-30% by weight of HIPS.
8. The resin composition according to claim 1 wherein said impact modifier is styrene ethylene butylene styrene (SEBS), poly(styrene-butadiene-styrene) (SBS), or styrene ethylene propylene styrene (SEPS), or a mixture thereof.
9. The resin composition according to claim 1 wherein said impact modifier is SEBS.
10. The resin composition according to claim 9 comprising high flow SEBS with a melt flow index that is greater than 3 g/10 min at 230° C./5 kg.
11. The resin composition according to claim 1 comprising 7-20% of the impact modifier.
12. The resin composition according to claim 1 comprising 20-200% by weight of a ceramic filler, as measured per 100 parts by weight of components (a)-(c).
13. The resin composition according to claim 1 wherein the ceramic filler is TiO 2 , ZnS, BaTiO 3 , or CaTiO 3 .
14. The resin composition according to claim 1 wherein the ceramic filler is TiO 2 .
15. The resin composition according to claim 1 , further comprising a flow modifier, reinforcing agent, antioxidant, heat stabilizer, light stabilizer, ultraviolet light stabilizer, ultraviolet absorbing additive, plasticizer, lubricant, release agent, antistatic agent, anti-fog agent, antimicrobial agent, chain extender, colorant, de-molding agents, flow promoter, flow modifier, surface effect additive, radiation stabilizer, flame retardant, anti-drip agent, or any combination thereof.
16. The resin composition according to claim 1 , wherein said poly(arylene ether) has an intrinsic viscosity of 0.3-0.5 dL/g.
17. The resin composition according to claim 1 , wherein said poly(arylene ether) has an intrinsic viscosity of 0.4-0.46 dL/g.
18. A plastic component formed from a composition that comprises
(a) 40-90% by weight of a poly(arylene ether);
(b) 0-40% by weight of high-impact polystyrene (HIPS) and 0-40% by weight of general-purpose polystyrene (GPPS), provided that the HIPS, the GPPS, or the combination thereof represents 5-40% by weight of said composition;
(c) 5-25% by weight of an impact modifier; and,
(d) 15-400% by weight of a ceramic filler, as measured per 100 parts by weight of components (a)-(c),
wherein components (a)-(c) are each expressed relative to the total weight of components (a)-(c), and
wherein the composition exhibits a Df value of 8.7 e-4 to 1.2 e-3 when evaluated at 1.1 GHz using a split post dielectric resonator on a minimum sample size of 120 millimeter (mm) by 120 mm and a maximum sample thickness of 6 mm.
19. A method of making a plastic component comprising:
extruding a resin composition comprising:
(a) 40-90% by weight of a poly(arylene ether);
(b) 0-40% by weight of high-impact polystyrene (HIPS) and 0-40% by weight of general-purpose polystyrene (GPPS), provided that the HIPS, the GPPS, or the combination thereof represents 5-40% by weight of said composition;
(c) 5-25% by weight of an impact modifier; and,
(d) 15-400% by weight of a ceramic filler, as measured per 100 parts by weight of components (a)-(c),
wherein components (a)-(c) are each expressed relative to the total weight of components (a)-(c);
and,
molding the extruded composition to form the component,
wherein the extruded composition exhibits a Df value of 8.7 e-4 to 1.2 e-3 when evaluated at 1.1 GHz using a split post dielectric resonator on a minimum sample size of 120 millimeter (mm) by 120 mm and a maximum sample thickness of 6 mm.