Poly(arylene ether) composition useful in blow molding
View Patent ↗A composition comprises poly(arylene ether), a rubber modified poly(alkenyle aromatic) resin, and an unsaturated impact modifier. The composition may further comprise an encapsulated fluoropolymer. The melt strength of the composition, measured as the hang time of an extruded tube, is especially suited for blow molding methods. The composition exhibits good melt strength, surface quality and/or sandability and is particularly useful in blow molding applications.
1. A blow molding composition comprising:
about 20 wt % to about 80 wt % of a poly(arylene ether) resin;
about 80 wt % to about 20 wt % of a high impact polystyrene; and
about 2 wt % to about 15 wt % of an unsaturated impact modifier;
wherein all weight percentages are based on the total weight of the composition and prior to blending the poly(arylene ether), the high impact polystyrene and the unsaturated impact modifier, the high impact polystyrene has particle sizes of about 2 micrometers to about 20 micrometers.
2. The composition of claim 1 , wherein the poly(arylene ether) has an intrinsic viscosity of about 0.30 deciliters/gram to about 0.46 deciliters/gram as measured in chloroform at 25° C.
3. The composition of claim 1 , wherein the composition further comprises an encapsulated fluoropolymer.
4. The composition of claim 3 , wherein the encapsulated fluoropolymer comprises a styrene acrylonitrile encapsulated polytetrafluoroethylene.
5. The composition of claim 1 , further comprising a homopolystyrene in an amount of about 5 wt % to about 40 wt % of the total weight of the composition.
6. The composition of claim 1 , further comprising a polyolefin.
7. The composition of claim 1 , wherein the unsaturated impact modifier comprises greater than about 30 wt % ethylenically unsaturated structural units based on the total weight of the impact modifier.
8. The composition of claim 1 , further comprising carbon black.
9. The composition of claim 1 , wherein the hang time of an extruded tube of the composition having a diameter of about 25 centimeters and a thickness of about 0.1 centimeters, sagging from a length of 30 centimeters to 75 centimeters, is about 4 seconds to about 90 seconds.
10. A blow molding composition comprising:
about 20 wt % to about 80 wt % of a poly(arylene ether) resin;
about 80 wt % to about 20 wt % of a high impact polystyrene;
about 0.005 wt % to about 2 wt % of an encapsulated fluoropolymer; and
about 2 wt % to about 15 wt % of an unsaturated impact modifier;
wherein all weight percentages are based on the total weight of the composition and prior to blending the poly(arylene ether), the high impact polystyrene and the unsaturated impact modifier, the high impact polystyrene has particle sizes of about 2 micrometers to about 20 micrometers.
11. The composition of claim 10 , wherein the hang time of an extruded tube of the composition having a diameter of about 25 centimeters and a thickness of about 0.1 centimeters, sagging from a length of 30 centimeters to 75 centimeters, is about 4 seconds to about 90 seconds.
12. The composition of claim 11 , wherein the hang time is about 5 seconds to about 30 seconds.
13. The composition of claim 10 , wherein the encapsulated fluoropolymer comprises a styrene-acrylonitrile copolymer encapsulated polytetrafluoroethylene.
14. The composition of claim 10 , further comprising a polyolefin.
15. The composition of claim 10 , wherein the poly(arylene ether) has an intrinsic viscosity of about 0.30 deciliters/gram to about 0.46 deciliters/gram as measured in chloroform at 25° C.
16. The composition of claim 10 , further comprising a homopolystyrene in an amount of about 5 wt % to about 40 wt % of the total weight of the composition.
17. The composition of claim 10 , wherein the unsaturated impact modifier comprises greater than about 30 wt % ethylenically unsaturated structural units based on the total weight of the impact modifier.
18. A method of molding an article comprising:
melt extruding a composition comprising
about 20 wt % to about 80 wt % of a poly(arylene ether) resin;
about 80 wt % to about 20 wt % of a high impact polystyrene; and
about 2 wt % to about 15 wt % of an unsaturated impact modifier;
wherein all weight percentages are based on the total weight of the composition and prior to blending the poly(arylene ether), the high impact polystyrene and the unsaturated impact modifier, the high impact polystyrene has particle sizes of about 2 micrometers to about 20 micrometers; and
blow molding the extruded composition to result in an article.
19. The method of claim 18 , wherein the poly(arylene ether) has an intrinsic viscosity of about 0.30 deciliters/gram to about 0.46 deciliters/gram as measured in chloroform at 25° C.
20. The method of claim 18 , wherein the composition further comprises an encapsulated fluoropolymer.
21. The method of claim 20 , wherein the encapsulated fluoropolymer comprises a styrene-acrylonitrile copolymer encapsulated polytetrafluoroethylene.
22. The method of claim 18 , wherein the composition further comprises a homopolystyrene in an amount of about 2 wt % to about 40 wt % of the total weight of the composition.
23. The method of claim 18 , wherein the composition further comprises a polyolefin.
24. The method of claim 18 , wherein the unsaturated impact modifier comprises greater than about 30 wt % ethylenically unsaturated structural units based on the total weight of the impact modifier.
25. The method of claim 18 , wherein the composition further comprises carbon black.
26. The method of claim 18 , wherein the hang time of an extruded tube of the composition having a diameter of about 25 centimeters and a thickness of about 0.1 centimeters, sagging from a length of 30 centimeters to about 75 centimeters is about 4 seconds to about 90 seconds.
27. The method of claim 26 , wherein the hang time is about 5 seconds to about 30 seconds.
28. An article formed by the method of claim 18 .