Blend for use in automobile application

1. An automobile part comprising:

a blend, said blend comprising:

(a) from 99.1 wt. % to 20 wt. % of a polypropylene homopolymer produced in the presence of a metallocene-based catalyst, wherein the metallocene-based catalyst has C-2 symmetry, wherein the metallocene-based catalyst is selected from the group consisting of dimethylsilanediyl-bis(cyclopentadienyl)zirconium dichloride, dimethylsilanediyl-bis(2-methyl-cyclopentadienyl)zirconium dichloride, dimethylsilanediyl-bis(3-methyl-cyclopentadienyl)zirconium dichloride, dimethylsilanediyl-bis(3-tert-butyl-cyclopentadienyl)zirconium dichloride, dimethylsilanediyl-bis(3-tert-butyl-5-methyl-cyclopentadienyl)zirconium dichloride, dimethylsilanediyl-bis(2,4-dimethyl-cyclopentadienyl)zirconium dichloride, dimethylsilanediyl-bis(indenyl)zirconium dichloride, dimethylsilanediyl-bis(2-methyl-indenyl)zirconium dichloride, dimethylsilanediyl-bis(3-methyl-indenyl)zirconium dichloride, dimethylsilanediyl-bis(3-tert-butyl-indenyl)zirconium dichloride, dimethylsilanediyl-bis(4,7-dimethyl-indenyl)zirconium dichloride, dimethylsilanediyl-bis(tetrahydroindenyl)zirconium dichloride, dimethylsilanediyl-bis(benzindenyl)zirconium dichloride, dimethylsilanediyl-bis(3,3′-2-methyl-benzindenyl)zirconium dichloride, dimethylsilanediyl-bis(4-phenyl-indenyl)zirconium dichloride, ethylene-bis(indenyl)zirconium dichloride, ethylene-bis(tetrahydroindenyl)zirconium dichloride, and isopropylidene-(3-tert-butyl-5-methyl-cyclopentadienyl)(fluorenyl) zirconium dichloride;

(b) from 0.1 wt. % to 50 wt. % of an elastomer; and

(c) a Ziegler-Natta catalyzed propylene homopolymer, a Ziegler-Natta catalyzed propylene copolymer, or mixtures thereof;

said blend having less than 45 ppm of volatile organic compounds (determined in accordance with VDA-278).

2. The automobile part of claim 1 , wherein the polypropylene homopolymer has a melt flow index of from 1 dg/min to 100 dg/min (measured according to ISO 1133, condition L, 230° C., 2.16 kg).

3. The automobile part of claim 1 , wherein the polypropylene homopolymer has a melting temperature of from 135° C. to 165° C.

4. The automobile part of claim 1 , wherein the polypropylene homopolymer has a xylene solubles content of less than 3 wt %.

5. The automobile part of claim 1 , wherein the polypropylene homopolymer has a content of mmmm pentads of at least 97%.

6. The automobile part of claim 1 , wherein the polypropylene homopolymer produced in the presence of a metallocene-based catalyst has a zirconium content in the range from 0.01 ppm to 5 ppm.

7. The automobile part of claim 1 , characterized in that said blend comprises from 5 wt % to 50 wt % of a mineral filler.

8. The automobile part of claim 1 , wherein the Ziegler-Natta catalyzed propylene homopolymer, Ziegler-Natta catalyzed propylene copolymer, or mixtures thereof is present in the blend in an amount of up to 79.9 wt %.

9. The automobile part of claim 1 , wherein the blend exhibits a flexural modulus that is at least 70% of the flexural modulus of the respective blend wherein the metallocene polypropylene homopolymer is substituted by a Ziegler-Natta polypropylene.

10. The automobile part of claim 1 , wherein the blend exhibits an impact strength that is at least 70% of the impact strength of the respective blend wherein the metallocene polypropylene homopolymer is substituted by a Ziegler-Natta polypropylene.

11. The automobile part of claim 1 , wherein the automobile parts are interior automobile parts.

12. The automobile part of claim 1 , wherein the automobile part is an injection molded automobile part.

13. An injection molded automobile part comprising:

a blend, said blend comprising:

(a) from 99.1 wt. % to 20 wt. % of a polypropylene homopolymer produced in the presence of a metallocene-based catalyst;

(b) from 0.1 wt. % to 50 wt. % of an elastomer; and

(c) a propylene polymer polymerized in the presence of a Ziegler-Natta catalyst;

said blend having less than 45 ppm of volatile organic compounds (determined in accordance with VDA-278).

14. The injection molded automobile part of claim 13 , wherein the propylene polymer polymerized in the presence of the Ziegler-Natta catalyst is a Ziegler-Natta catalyzed propylene homopolymer, Ziegler-Natta catalyzed propylene copolymer, or mixtures thereof.

15. An automobile part comprising:

a blend, said blend comprising:

(a) from 99.1 wt. % to 20 wt. % of a polypropylene homopolymer produced in the presence of a metallocene-based catalyst;

(b) from 0.1 wt. % to 50 wt. % of an elastomer; and

(c) a propylene polymer selected from Ziegler-Natta catalyzed propylene homopolymers, Ziegler-Natta catalyzed propylene copolymers, and mixtures thereof;

said blend having less than 45 ppm of volatile organic compounds (determined in accordance with VDA-278);

wherein the metallocene-based catalyst is represented by formula (I)

μ-R 1 (C 5 R 2 R 3 R 4 R 5 )(C 5 R 6 R 7 R 8 R 9 )MX 1 X 2   (I)

wherein bridged R 1 is SiR 10 R 11 ;

wherein R 10 and R 11 are each independently selected from the group consisting of C 1 -C 10 alkyl, C 5 -C 7 cycloalkyl, and C 6 -C 15 aryl, or wherein R 10 and R 11 form a cyclic saturated or non-saturated C 4 -C 10 ring; and

wherein M is Zr;

wherein X 1 and X 2 are independently selected from the group consisting of halogen, hydrogen, and C 1 -C 10 alkyl; and

wherein (C 5 R 2 R 3 R 4 R 5 ) and (C 5 R 6 R 7 R 8 R 9 ) are indenyl of the formula C 9 R 12 R 13 R 14 R 15 R 16 R 17 R 18 R 19 ; and

wherein R 12 , R 13 , R 14 , R 15 , R 16 , R 17 , R 18 , and R 19 are each independently selected from the group consisting of hydrogen, C 1 -C 10 alkyl, C 5 -C 7 cycloalkyl, C 6 -C 15 aryl, and alkylaryl with C 1 -C 10 alkyl and C 6 -C 15 aryl, or wherein two neighboring R of R 12 , R 13 , R 14 , R 15 , R 16 , R 17 , R 18 , and R 19 form a cyclic saturated or non-saturated C 4 -C 10 ring.

16. The automobile part of claim 15 , wherein the metallocene-based catalyst has C-2 symmetry.

17. The automobile part of claim 15 , wherein the polypropylene homopolymer has a zirconium content in the range from 0.01 ppm to 5 ppm.

18. The automobile part of claim 1 , wherein the blend comprises a Ziegler-Natta catalyzed propylene homopolymer.

19. The automobile part of claim 1 , wherein the blend comprises a Ziegler-Natta catalyzed propylene copolymer.

20. The automobile part of claim 1 , wherein the blend comprises a mixture comprising a Ziegler-Natta catalyzed propylene homopolymer and a Ziegler-Natta catalyzed propylene copolymer.