Automotive material with excellent flow, high stiffness, excellent ductility and low CLTE

1. A composition having a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 10 to 50 g/10 min.,

said composition comprises a heterophasic polypropylene (H-PP1), a heterophasic polypropylene (H-PP2), a plastomer (P) and a mineral filler (F), wherein

(a) the heterophasic polypropylene (H-PP1) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 3.0 to 30.0 g/10 min and comprises

(a1) a matrix (M1) being a propylene homopolymer and

(a2) an elastomeric copolymer (E1) comprising units derived from propylene and ethylene and/or C4 to C20 α-olefin.

(b) the heterophasic polypropylene (H-PP2) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 40.0 to 1000.0 g/10 min and

a xylene cold soluble (XCS) content measured according to ISO 6427 in the range of 7.0 to 20.0 wt.-% and comprises

(b1) a matrix (M2) being a propylene homopolymer and

(b2) an elastomeric copolymer (E2) comprising units derived from propylene and ethylene and/or C4 to C20 α-olefin, and

(c) the plastomer (P) is different to the elastomeric copolymer (E1) and to the elastomeric copolymer (E2).

2. The composition according to claim 1 , wherein the xylene cold soluble (XCS) content of the heterophasic polypropylene (H-PP1) measured according to ISO 6427 is

(a) higher compared to the xylene cold soluble (XCS) content of the heterophasic polypropylene (H-PP2) measured according to ISO 6427 and/or

(b) in the range of 22.0 to 50.0 wt.-%.

3. The composition according to claim 1 , wherein the heterophasic polypropylene (H-PP1) has

(a) a total propylene content 75.0 to 92.0 wt.-% and/or

(b) a propylene content in the xylene cold soluble (XCS) fraction of 50.0 to 75.0 wt.-%.

4. The composition according to claim 1 , wherein the intrinsic viscosity (IV) measured according to ISO 1268-1 (decalin) of the xylene cold soluble (XCS) fraction of the heterophasic polypropylene (H-PP1) is

(a) higher compared to the intrinsic viscosity (IV) measured according to ISO 1268-1 (decalin) of the xylene cold soluble (XCS) fraction of the heterophasic polypropylene (H-PP2) and/or

(b) above 2.5 dl/g.

5. The composition according to claim 1 wherein the melt flow rate MFR 2 (230° C.) measured according to ISO 1133 of the xylene cold insoluble (XCI) fraction of the heterophasic polypropylene (H-PP1) is

(a) lower compared to the melt flow rate MFR 2 (230° C.) measured according to ISO 1133 of the xylene cold insoluble (XCI) fraction of the heterophasic polypropylene (H-PP2) and/or

(b) in the range of 20.0 to 150.0 g/10 min.

6. The composition according to claim 1 , wherein the melt flow rate MFR 2 (230° C.) measured according to ISO 1133 of the xylene cold insoluble (XCI) fraction of the heterophasic polypropylene (H-PP2) is in the range of 100.0 to 1500.0 g/10 min.

7. The composition according to any one of the preceding claims, wherein the heterophasic polypropylene (H-PP2) has

(a) a total propylene content 85.0 to 96.0 wt.-% and/or

(b) a higher total propylene content compared to the heterophasic polypropylene (H-PP1) and/or

(c) a propylene content in the xylene cold soluble (XCS) fraction of 50.0 to 75.0 wt.-%.

8. The composition according to claim 1 , wherein the intrinsic viscosity (IV) measured according to ISO 1268-1 (decalin) of the xylene cold soluble (XCS) fraction of the heterophasic polypropylene (H-PP2) is below 3.0 dl/g.

9. The composition according to claim 1 , wherein the plastomer (P) is a linear low density polyethylene (LLDPE).

10. The composition according to claim 1 , wherein the plastomer (P)

(a) comprises units derived from ethylene and at least one C4 to C20 α-olefin and/or

(b) has an ethylene content of at least 50 wt.-%.

11. The composition according to claim 1 , wherein the plastomer (P) has

(a) a density measured according to ISO 1183-187 in the range 820 to 900 kg/m 3 and/or

(b) a melt flow rate MFR 2 (190° C.) measured according to ISO 1133 in the range of 3.0 to 15.0 g/10 min.

12. The composition of claim 11 , wherein the mineral filler (F) is talc.

13. The composition according to claim 1 , wherein

(a) neither the total composition nor its individual components are visbroken and/or

(b) the heterophasic polypropylene (H-PP1), the heterophasic polypropylene (H-PP2), and the plastomer (P) are the only polymer components within the composition.

14. The composition according to claim 1 , wherein the composition comprises:

(a) 20 to 40 wt.-% of the heterophasic polypropylene (H-PP1),

(b) 18 to 38 wt.-% of the heterophasic polypropylene (H-PP2),

(c) 12 to 30 wt.-% of the plastomer (P), and

(d) 15 to 30 wt.-% of the mineral filler (F).

15. An automotive article comprising a composition according to claim 1 .

16. A process for the preparation of the composition according to claim 1 comprising the steps of adding the heterophasic polypropylene (H-PP1), the heterophasic polypropylene (H-PP2), the plastomer (P), and the mineral filler (F) to an extruder and extruding the same to obtain said composition.

17. A process for the manufacture of an automotive article comprising the step of molding the composition of claim 1 .