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This invention relates a composition comprising: (i) at least one low molecular weight polyolefin;(ii) a block copolymer obtainable by selectively hydrogenating a block copolymer having terminal polymeric blocks of a vinyl aromatic monomer and a mid-block prepared originally with an olefin and subse

This invention relates a composition comprising: (i) at least one low molecular weight polyolefin;(ii) a block copolymer obtainable by selectively hydrogenating a block copolymer having terminal polymeric blocks of a vinyl aromatic monomer and a mid-block prepared originally with an olefin and subsequently hydrogenated; and(iii) polypropylene;(iv) with the proviso that when (i) is a PAO having a molecular weight of between about 400 and 1000 g/mole, either: (a) (iii) is a homopolymer characterized by an MFR greater than 2 g/10 min,(b) (iii) is a copolymer; or(c) (iii) is a polymer or copolymer made by a metallocene catalyst; or(d) the composition does not contain calcium carbonate.

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1. A thermoplastic elastomer composition comprising: (i) at least one low molecular weight polyalphaolefin comprising oligomers of C5 to C18 olefins, wherein the polyalphaolefin has a number average molecular weight, Mn, of 300 to 15,000 g/mol, a kinematic viscosity of 10 cSt or more at 100° C., a p

1. A thermoplastic elastomer composition comprising: (i) at least one low molecular weight polyalphaolefin comprising oligomers of C5 to C18 olefins, wherein the polyalphaolefin has a number average molecular weight, Mn, of 300 to 15,000 g/mol, a kinematic viscosity of 10 cSt or more at 100° C., a pour point of −20° C. or less according to ASTM D97, a flash point of 200° C. or more according to ASTM D56, a specific gravity of 0.855 or less, and a viscosity index of 130 or more;(ii) 10.0 to 30.0 wt % of a block copolymer obtainable by selectively hydrogenating a block copolymer having terminal polymeric blocks of a vinyl aromatic monomer and a mid-block prepared originally with an olefin and subsequently hydrogenated; and(iii) 5.0 to 50.0 wt % of polypropylene having a weight average molecular weight, Mw, of 30,000 to 2,000,000 g/mol;wherein the wt % are based on the total weight of the composition; and(iv) with the proviso that when (i) is a PAO having a number average molecular weight, Mn, of between about 400 and 1000 g/mole: (a) (iii) is a homopolymer characterized by an MFR greater than 2 g/10 min under 2.16 kg load, or(b) (iii) is a copolymer; or(c) (iii) is a polymer or copolymer made by a metallocene catalyst; or(d) the composition does not contain calcium carbonate; and(v) wherein the composition after aging at 125° C. in air for 5 days has all of the following parameters: (a) decrease in 100% Tensile Modulus of less than 15%;(b) decrease in Tensile Strength of less than 55%;(c) decrease in Elongation at Break of less than 25%; and(d) decrease in Toughness of less than 60%, and the decrease is measured relative to the original sample prior to aging. 2. The composition of claim 1, wherein (ii) is further characterized by at least one of (a) end-blocks having Mn greater than about 10,000; and (b) mid-blocks having Mn greater than about 75,000. 3. The composition of claim 1, wherein (ii) is further characterized by a vinyl aromatic monomer content of greater than 15 wt %, based on the weight of the block copolymer. 4. The composition of claim 1, wherein (ii) comprises at least one SEBS, said SEBS characterized by at least one of the following: (a) end-blocks having Mn greater than about 10,000 and mid-blocks having Mn greater than about 75,000; and (b) a styrenic content of greater than 15 wt %, based on the weight of the block copolymer. 5. The composition of claim 1, wherein the at least one low molecular weight polyalphaolefin has an Mn of from greater than about 600 g/mol and less than about 3,000 g/mol. 6. The composition of claim 1, wherein the at least one low molecular weight polyalphaolefin is a liquid at 25° C. 7. The composition of claim 1, wherein (ii) is selected from selectively hydrogenated SIS, SBS, star-branched SIS, and star-branched SBS. 8. The composition of claim 1, wherein the polypropylene is selected from atactic polypropylene, isotactic polypropylene, syndiotactic polypropylene, and mixtures thereof. 9. The composition of claim 1, wherein said polypropylene is selected from polypropylene produced using a Zeigler Natta catalyst, a polypropylene produced using a metallocene catalyst, or mixtures thereof. 10. The composition of claim 1, wherein said at least one low molecular weight polyalphaolefin is a non-functional plasticizer (NFP) characterized as a liquid with no distinct melting point above 0° C. and a kinematic viscosity at 25° C. of 30,000 cSt or less, and further characterized by at least one parameter selected from the following: (a) kinematic viscosity at 100° C. (KV100)200° C.; (c) Pour Point←25° C.; (d) Specific Gravity of 0.85 or less; a distillation range having a difference between the upper temperature and the lower temperature of 40° C. or less; and (e) a final boiling point of from 115° C. to 500° C. 11. The composition according to claim 10, wherein said NFP is characterized by at least two of said parameters. 12. The composition according to claim 10, wherein said NFP is characterized by at least three of said parameters. 13. The composition according to claim 10, wherein said NFP is characterized by at least four of said parameters. 14. The composition according to claim 10, wherein said NFP is characterized by all of said parameters. 15. The composition according to claim 10, wherein said NFP is produced using a metallocene catalyst. 16. The composition according to claim 10, wherein said NFP is produced using a reduced metal oxide catalyst. 17. The composition according to claim 10, wherein said NFP is produced using a zeolite catalyst. 18. The composition of claim 1, wherein said composition does not contain calcium carbonate. 19. The composition of claim 1, wherein said composition does not contain vulcanizing agents, phthalate plasticizers, and UV and gamma radiation stabilizers. 20. The composition of claim 1, wherein: (a) the decrease in 100% Tensile Modulus is less than 10%;(b) the decrease in Tensile Strength is less than 45%;(c) the decrease in Elongation at Break is less than 15%; and(d) the decrease in Toughness is less than 45%. 21. The composition of claim 1, characterized by at least two of said parameters. 22. The composition of claim 1, characterized by at least three of said parameters. 23. The composition of claim 1, characterized by all four of said parameters. 24. The composition of claim 1, wherein the at least one low molecular weight polyalphaolefin has an Mn of greater than about 1,000 g/mol. 25. An article comprising the composition of claim 1. 26. A thermoformed article comprising the composition according to claim 1. 27. An article comprising an insulation material and a material insulated by said insulation material, wherein said insulation material comprises the composition according to claim 1. 28. The article according to claim 27, wherein said material insulated by said insulation material is selected from the group consisting of wire, cable, fiber, and combinations thereof. 29. A thermoforming process comprising thermoforming an article from a composition comprising an elastomeric material, the improvement comprising providing a composition according to claim 1. 30. The thermoforming process according to claim 29, said thermoforming process selected from injection molding and extrusion. 31. The composition of claim 1, wherein the at least one low molecular weight polyalphaolefin has an Mn of between about 400 and 1000 g/mole and the polypropylene is a homopolymer characterized by an MFR greater than 2 g/10 min. 32. The composition of claim 1, wherein the at least one low molecular weight polyalphaolefin has an Mn of between about 400 and 1000 g/mole and the polypropylene is a homopolymer characterized by an MFR greater than 5 g/10 min. 33. The composition of claim 1, wherein the at least one low molecular weight polyalphaolefin has an Mn of between about 400 and 1000 g/mole and the polypropylene is a homopolymer characterized by an MFR greater than 10 g/10 min. 34. The composition of claim 1, wherein the at least one low molecular weight polyalphaolefin has an Mn of between about 400 and 1000 g/mole and the polypropylene is a homopolymer characterized by an MFR greater than 20 g/10 min. 35. The composition of claim 1, wherein the at least one low molecular weight polyalphaolefin has an Mn of between about 400 and 1000 g/mole and the polypropylene is a homopolymer characterized by an MFR greater than 30 g/10 min. 36. The composition of claim 1, wherein the polypropylene is present in an amount of at least 14 wt % based on the weight of the overall composition. 37. A thermoplastic elastomer composition comprising: (i) at least one low molecular weight polyalphaolefin comprising oligomers of C5 to C18 olefins, wherein the polyalphaolefin has a number average molecular weight, Mn, of 300 to 15,000 g/mol, a kinematic viscosity of 10 cSt or more at 100° C., a pour point of −20° C. or less according to ASTM D97, a flash point of 200° C. or more according to ASTM D56, a specific gravity of 0.855 or less, and a viscosity index of 130 or more;(ii) 50.0 to 70.0 wt % of a block copolymer obtainable by selectively hydrogenating a block copolymer having terminal polymeric blocks of a vinyl aromatic monomer and a mid-block prepared originally with an olefin and subsequently hydrogenated; and(iii) 5.0 to 50.0 wt % of polypropylene having a weight average molecular weight, Mw, of 30,000 to 2,000,000 g/mol;wherein the wt % are based on the total weight of the composition; and(iv) with the proviso that when (i) is a PAO having a number average molecular weight, Mn, of between about 400 and 1000 g/mole: (a) (iii) is a homopolymer characterized by an MFR greater than 2 g/10 min under 2.16 kg load, or(b) (iii) is a copolymer; or(c) (iii) is a polymer or copolymer made by a metallocene catalyst; or(d) the composition does not contain calcium carbonate; and(v) wherein the composition after aging at 125° C. in air for 5 days has all of the following parameters: (a) decrease in 100% Tensile Modulus of less than 15%;(b) decrease in Tensile Strength of less than 55%;(c) decrease in Elongation at Break of less than 25%; and(d) decrease in Toughness of less than 60%, and the decrease is measured relative to the original sample prior to aging.