Polypropylene composition suitable for primerless painting

1. Polypropylene composition (C), the polypropylene composition (C) comprising:

(a) 40.0 to 80.0 wt. %, based on the total weight of the composition, of a propylene copolymer (R-PP) wherein the propylene copolymer (R-PP) comprises two fractions, a first propylene copolymer fraction (R-PP1) and a second propylene copolymer fraction (R-PP2), said first propylene copolymer fraction (R-PP1) differs from said second propylene copolymer fraction (R-PP2) in the comonomer content; wherein the propylene copolymer (R-PP) having

(a1) a comonomer content in the range of 1.5 to 8.0 wt. %, and

(a2) a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 5.0 to 100.0 g/10 min, and

wherein the propylene copolymer (R-PP) has:

(a3) a glass transition temperature in the range of −12 to +2° C.; and/or

(a4) no glass transition temperature below −20° C.; and

(b) 20.0 to 40.0 wt. %, based on the total weight of the composition, of a mineral filler (F) being selected from the group consisting of talcum, wollastonite, kaolin, and mica,

wherein the polypropylene composition (C) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 5.0 to 45.0 g/10 min.

2. The polypropylene composition (C) according to claim 1 , wherein the propylene copolymer (R-PP) has:

(a) a melting temperature in the range of 135 to 165° C., and/or

(b) a tensile modulus of at least 800 MPa, and/or

(c) a Charpy notched impact strength at +23° C. of ≥4 kJ/m 2 .

3. The polypropylene composition (C) according to claim 1 , wherein the propylene copolymer (R-PP):

is monophasic.

4. The polypropylene composition (C) according to claim 1 , wherein the propylene copolymer (R-PP) comprises a comonomer selected from ethylene, C 4 to C 12 α-olefin, and mixtures thereof.

5. The polypropylene composition (C) according to claim 1 , wherein:

(a) the weight ratio between the first propylene copolymer fraction (R-PP1) and the second propylene copolymer fraction (R-PP2) of the propylene copolymer (R-PP) [(R-PP1):(R-PP2)] is 70:30 to 30:70; and/or

(b) the comonomers for the first propylene copolymer fraction (R-PP1) and the second propylene copolymer fraction (R-PP2) of the propylene copolymer (R-PP) are selected from ethylene, C 4 to C 12 α-olefin, and mixtures thereof.

6. The polypropylene composition (C) according to claim 1 , wherein

(a) the first propylene copolymer fraction (R-PP1) of the propylene copolymer (R-PP) is the comonomer lean fraction and the second propylene copolymer fraction (R-PP2) of the propylene copolymer (R-PP) is the comonomer rich fraction, and/or

(b) the first propylene copolymer fraction (R-PP1) of the propylene copolymer (R-PP) has a lower comonomer content than the propylene copolymer (R-PP).

7. The polypropylene composition (C) according to claim 1 , wherein:

(a) the first propylene copolymer fraction (R-PP1) and the second propylene copolymer fraction (R-PP2) of the propylene copolymer (R-PP) fulfill together the in-equation (I)

Co

⁢

⁢

(

R

-

PP

⁢

⁢

2

)

Co

⁢

⁢

(

R

-

PP

⁢

⁢

1

)

≥

1.0

;

(

I

)

wherein;

Co(R-PP1) is the comonomer content [wt. %] of the first propylene copolymer fraction (R-PP1),

Co(R-PP2) is the comonomer content [wt. %] of the second propylene copolymer fraction (R-PP2), and/or,

(b) the first propylene copolymer fraction (R-PP1) and the propylene copolymer fraction (R-PP) fulfill together the in-equation (II):

Co

⁢

⁢

(

R

-

PP

⁢

)

Co

⁢

⁢

(

R

-

PP

⁢

⁢

1

)

≥

1.0

(

II

)

wherein;

Co(R-PP1) is the comonomer content [wt. %] of the first propylene copolymer fraction (R-PP1),

Co(R-PP) is the comonomer content [wt. %] of the propylene copolymer (R-PP).

8. The polypropylene composition (C) according to claim 1 , wherein the mineral filler (F) is talcum.

9. The polypropylene composition (C) according to claim 1 , wherein the polypropylene composition (C) comprises 2.0 to 15.0 wt. %, based on the total weight of the composition, of an elastomeric copolymer (E) comprising units derived from ethylene and C 4 to C 8 α-olefins.

10. The polypropylene composition (C) according to claim 9 , wherein the elastomeric copolymer (E) has:

(a) a density of equal or less than 935 kg/m 3 , and/or

(b) a melt flow rate MFR 2 (190° C.) measured according to ISO 1133 in the range of 0.25 to 30.0 g/10 min.

11. Article comprising a polypropylene composition (C) according to claim 1 .

12. The article according to claim 11 , wherein the article is an automotive article selected from the group consisting of bumpers, body panels, rocker panels, side trims, step assists, spoilers and dash boards.