Glass fiber composite of improved processability

1. Fiber reinforced composition comprising

(a) a heterophasic propylene copolymer (HECO),

(b) a propylene homopolymer (H-PP1) and/or a propylene copolymer (C-PP1), and

(c) fibers (F),

wherein

(i) the propylene copolymer (C-PP1) comprises not more than 2.0 wt.-% C2 to C10 α-olefins other than propylene,

(ii) the propylene homopolymer (H-PP1) and the propylene copolymer (C-PP1) have a melt flow rate MFR 2 (230 C) measured according to ISO 1133 of at least 600 g/10 min, and

(iii) the composition has a melt flow rate MFR 2 (230 C) measured according to ISO 1133 of at least 10 g/10 min.

2. Fiber reinforced composition according to claim 1 , wherein the heterophasic propylene copolymer (HECO) comprises a polypropylene matrix (M-PP) and dispersed therein an elastomeric copolymer (E1) comprising units derived from

propylene and

ethylene and/or C4 to C20 α-olefin.

3. Fiber reinforced composition according to claim 2 , wherein the polypropylene matrix (M-PP) has a lower melt flow rate MFR 2 (230° C.) measured according to ISO 1133 than the propylene homopolymer (H-PP1) and the propylene copolymer (C-PP1).

4. Fiber reinforced composition according to claim 2 , wherein the composition comprises additionally

(a) an elastomer (E2) being different to the elastomeric copolymer (E1),

and/or

(b) a compatibilizer (C).

5. Fiber reinforced composition according to claim 4 , wherein the composition comprises

(a) 5.0 to 50.0 wt.-% of the heterophasic propylene copolymer (HECO)

(b) 10.0 to 60.0 wt.-% of the propylene homopolymer (H-PP1), of the propylene copolymer (C-PP1), or of the mixture of the propylene homopolymer (H-PP1) and the propylene copolymer (C-PP1)

(c) 10.0 to 45.0 wt.-% of fibers,

(d) optionally 3.0 to 20.0 wt.-% of the elastomer (E2), and

(e) optionally 0.5 to 4.0 wt.-% of the compatibilizer (C),

based on the total composition.

6. Fiber reinforced composition according to claim 1 , wherein the heterophasic propylene copolymer (HECO) has

(a) a xylene cold soluble content (XCS) measured according ISO 6427 (23 C) of not more than 45 wt.-%,

and/or

(b) a melt flow rate MFR 2 (230 C) measured according to ISO 1133 of more than 10 g/10 min,

and/or

(c) a total C2 to C10 α-olefin content other than propylene of 5 to 25 wt.-%.

7. Fiber reinforced composition according to claim 1 , wherein the propylene homopolymer (H-PP1) has

(a) a melt flow rate MFR 2 (230 C) measured according to ISO 1133 in the range of 600 to 1,500 g/10 min

and/or

(b) a molecular weight distribution (M w /M n ) of 2.0 to 6.0

and/or

(c) melting temperature Tm measured according to ISO 11357-3 of at least 145 C.

8. Fiber reinforced composition according to claim 1 , wherein the propylene copolymer (C-PP1) has

(a) a melt flow rate MFR 2 (230 C) measured according to ISO 1133 in the range of 600 to 1,500 g/10 min

and/or

(b) a molecular weight distribution (M w /M n ) of 2.0 to 6.0

and/or

(c) melting temperature Tm measured according to ISO 11357-3 of at least 140 C.

9. Fiber reinforced composition according to claim 1 , wherein the fibers are selected from the group consisting of glass fibers, metal fibers, ceramic fibers and graphite fibers.

10. Fiber reinforced composition according to claim 4 , wherein the elastomer (E2) is a linear low density polyethylene (LLDPE).

11. Fiber reinforced composition according to claim 4 , wherein the elastomer (E2)

(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.-%,

and/or

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

and/or

(d) has a melt flow rate MFR 2 (190 C) measured according to ISO 1133 in the range of 0.5 to 50.0 g/10 min.

12. Fiber reinforced composition according to claim 4 , wherein the compatibilizer (C) is a maleic anhydride functionalized polypropylene.

13. Automotive article comprising a fiber reinforced composition comprising:

(a) a heterophasic propylene copolymer (HECO),

(b) a propylene homopolymer (H-PP1) and/or a propylene copolymer (C-PP1),

(c) an elastomer (E2), and

(d) fibers (F),

wherein

(i) the propylene copolymer (C-PP1) comprises not more than 2.0 wt.-% C2 to C10 α-olefins other than propylene,

(ii) the propylene homopolymer (H-PP1) and the propylene copolymer (C-PP1) have a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 of at least 600 g/10 min, and

(iii) the composition has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 of at least 10 g/10 min.

14. Fiber reinforced composition according to claim 1 formed into automotive articles.

15. Process for the preparation of a fiber reinforced composition comprising the steps of adding

(a) a heterophasic propylene copolymer (HECO),

(b) a propylene homopolymer (H-PP1), a propylene copolymer (C-PP1), or a mixture of the propylene homopolymer (H-PP1) and the propylene copolymer (C-PP1),

(c) a fibers (F)

(d) optionally a elastomer (E2), and

(e) optionally a compatibilizer (C),

to an extruder and extruding the same obtaining said fiber reinforced composition, wherein the propylene homopolymer (H-PP1) and the propylene copolymer (C-PP1) have a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 of at least 600 g/10 mol.

16. Fiber reinforced composition according to claim 1 , wherein the heterophasic propylene copolymer (HECO) comprises a propylene homopolymer (H-PP2) and dispersed therein an elastomeric copolymer (E1) comprising units derived from

propylene and

ethylene and/or C4 to C20 α-olefin.