Use of a polymer composition for the production of articles with improved paintability and surface appearance
The present invention is directed to the use of a polypropylene composition comprising at least one heterophasic polypropylene and a filler for the production of at least partially painted articles which show both a good paintability and a good surface appearance; and the painted articles produced therefrom. Further the invention is directed to a polypropylene composition showing improved surface appearance and paintability.
1. A method comprising producing at least partially painted articles from a polypropylene composition comprising
(A) a heterophasic polypropylene having a xylene cold soluble fraction (XCS) of 10.0 to 45 wt % and an intrinsic viscosity (IV) of the xylene cold soluble (XCS) fraction of 2.1 to 4.5 dl/g,
(B) a heterophasic polypropylene having an intrinsic viscosity (IV) of (XCS) >5.0 dl/g,
(C) a filler, and
(D) a C 2 -α-Olefin having a MFR (190° C./2.16 kg) <0.5 g/10 min, with the polypropylene composition having an intrinsic viscosity (IV) of (XCS) of >3.0 dl/g and a ratio of intrinsic viscosity (IV) of (XCS)/xylene cold soluble fraction (XCS) of >0.113 dl/g.
2. The method according to claim 1 wherein in the polypropylene composition component (A) is present in an amount of 40 to 80 wt % and component (B) is present in an amount of 10 to 50 wt %, based on a total weight of the polypropylene composition.
3. The method according to claim 1 wherein component (B) is present in the polypropylene composition in an amount of 10 to 40 wt % based on the total weight of the polypropylene composition.
4. The method according to claim 1 wherein the polypropylene composition has an MFR (230° C./2.16 kg) in the range of 5.0 to 80 g/10 min.
5. The method according to claim 1 wherein component (A) has an MFR (230° C. 2.16 kg) of 4.0 to 120 g/10 min.
6. The method according to claim 1 wherein the intrinsic viscosity (IV) of (XCS) of component (A) is in the range of 2.2 to 4.5 dl/g.
7. The method according to claim 1 wherein the MFR (230° C./2.16 kg) of component (B) is >5.0 g/10 min.
8. The method according to claim 1 wherein the intrinsic viscosity (IV) of (XCS) of component (B) is in a range of 6.0 to 12.0 dl/g.
9. The method according to claim 1 wherein component (C) is present in the polypropylene composition in an amount of 5 to 25 wt % based on the total weight of the polypropylene composition.
10. The method according to claim 1 wherein the C 2 -a-Olefin of component (D) is having 4 C-atoms.
11. The method according to claim 1 wherein the intrinsic viscosity (IV) of (XCS) of component (D) is >2.0 dl/g.
12. The method according to claim 1 wherein component (D) is present in an amount of 10 to 20 wt % based on the total weight of the polypropylene composition.
13. The method according to claim 1 wherein the polypropylene composition is comprising 40 to 70 wt % of component (A), 10 to 40 wt % of component (B) 5 to 25 wt % of component (C) and 10 to 20 wt % of component (D), based on the total weight of the final polypropylene composition.
14. The method according to claim 1 wherein the at least partially painted articles show
a sum of the average delaminated area DA 2 (measured according to DIN 55662 Method C) and the average delaminated area DA 3 (measured according to DIN 55662 Method C) of <55.0 mm 2 .
15. The method according to claim 14 wherein the at least partially painted articles show a Tigerskin value (measured according to PPS 25 Intern. Conf. Polym. Proc. Soc 2009 or Proceedings of the SPIE, Volume 6831, pp 68130T-68130T-8 (2008)) of <46.0.
16. The method according to claim 1 wherein the at least partially painted articles show an average delaminated area DA 2 (measured according to DIN 55662 Method C) of <1 mm 2 and a Tigerskin value (measured according to PPS 25 Intern. Conf. Polym. Proc. Soc 2009 or Proceedings of the SPIE, Volume 6831, pp 68130T- 68130T-8 (2008)) of <6.8.
17. At least partially painted article comprising a polypropylene composition comprising
(A) a heterophasic polypropylene having a xylene cold soluble fraction (XCS) of 10.0 to 45 wt % and an intrinsic viscosity (IV) of the xylene cold soluble (XCS) fraction of 2.1 to 4.5 dl/g,
(B) a heterophasic polypropylene having an intrinsic viscosity (IV) of (XCS) >5.0 dl/g,
(C) a filler, and
(D) a C 2 -α-Olefin having a MFR (190° C./2.16 kg) <0.5 g/10 min,
with the polypropylene composition having an intrinsic viscosity (IV) of (XCS) of >3.0 dl/g and a ratio of intrinsic viscosity (IV) of (XCS)/xylene cold soluble fraction (XCS) of >0.113 dl/g.
18. The at least partially painted article according to claim 17 with the at least partially painted article being an automotive article.
19. Polypropylene composition comprising
(A) a heterophasic polypropylene having a xylene cold soluble fraction (XCS) of 10.0 to 45 wt % and an intrinsic viscosity (IV) of (XCS) of 2.1 to 4.5 dl/g,
(B) a heterophasic polypropylene having an intrinsic viscosity (IV) of (XCS) >5.0 dl/g,
(C) a filler, and
(D) a C 2 -a-Olefin having an MFR (190° C./2.16 kg) <0.5 g/10 min
with the polypropylene composition having an intrinsic viscosity (IV) of (XCS) of >3.0 dl/g and a ratio of intrinsic viscosity (IV) of (XCS)/xylene cold soluble fraction (XCS) of >0.113 dl/g.
20. At least partially painted article comprising a polypropylene composition comprising
(A) a heterophasic polypropylene having a xylene cold soluble fraction (XCS) of 10.0 to 45 wt % and an intrinsic viscosity (IV) of the xylene cold soluble (XCS) fraction of 2.1 to 4.5 dl/g,
(B) a heterophasic polypropylene having an intrinsic viscosity (IV) of (XCS) >5.0 dl/g, and
(C) a filler
wherein the polypropylene composition has an intrinsic viscosity (IV) of (XCS) of >3.0 dl/g and a ratio of intrinsic viscosity (IV) of (XCS)/xylene cold soluble fraction (XCS) of >0.113 dl/g, and
wherein the at least partially painted articles show
a sum of the average delaminated area DA 2 (measured according to DIN 55662 Method C) and the average delaminated area DA 3 (measured according to DIN 55662 Method C) of <55.0 mm 2 .