Blow molded article based on bimodal random copolymer

1. A blow molded article comprising a propylene copolymer composition (P), the propylene copolymer composition (P) comprising

(a) a propylene copolymer (A) having a comonomer content of 0.1 to 2.5 mol-%, the comonomers are C 5 to C 12 α-olefins, and

(b) a propylene copolymer (B) having a comonomer content of 1.0 to 7.0 mol-%, the comonomers are C 5 to C 12 α-olefins, wherein further

(i) the comonomer content in the propylene copolymer (A) is lower compared to the comonomer content in the propylene copolymer (B),

(ii) the propylene copolymer composition (P) has a comonomer content of 0.6 to 1.7 mol-%, the comonomers are C 5 to C 12 α-olefins.

2. The blow molded article according to claim 1 , wherein the propylene copolymer (A) has

(a) a comonomer content of 0.1 to 1.5 mol-%, the comonomers are C 5 to C 12 α-olefins, and/or

(b) a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 0.1 to 10.0 g/10 min, and/or

(c) a xylene soluble content (XCS) determined at 23° C. according to ISO 6427 of ≦10.0 wt.-%.

3. The blow molded article according to claim 1 , wherein the propylene copolymer (B) has

(a) a comonomer content of 1.5 to 5.0 mol-%, the comonomers are C 5 to C 12 α-olefins, and/or

(b) a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 1.0 to 20.0 g/10 min, and/or

(c) a xylene soluble content (XCS) determined at 23° C. according to ISO 6427 of ≦10.0 wt.-%.

4. The blow molded article according to claim 1 , wherein the propylene copolymer composition (P) has

(a) a comonomer content of 0.6 to 4.0 mol-%, the comonomers are C 5 to C 12 α-olefins, and/or

(b) a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 1.0 to 20.0 g/10 min, and/or

(c) a xylene soluble content (XCS) determined at 23° C. according to ISO 6427 of ≦10.0 wt.-%.

5. The blow molded article according to claim 1 , wherein the comonomers

(a) of the propylene copolymer (A) and of the propylene copolymer (B) are independently selected from the group of C 5 α-olefin, C 6 α-olefin, C 7 α-olefin, C 8 α-olefin, C 9 α-olefin, C 10 α-olefin, C 11 α-olefin and C 12 α-olefin, or

(b) of the propylene copolymer (A) and of the propylene copolymer (B) are the same and are selected from the group of C 5 α-olefin, C 6 α-olefin, C 7 α-olefin, C 8 α-olefin, C 9 α-olefin, C 10 α-olefin, C 11 α-olefin and C 12 α-olefin.

6. The blow molded article according to claim 1 , wherein the propylene copolymer composition (P) is a propylene 1-hexene copolymer.

7. The blow molded article according to claim 1 , wherein the ratio MFR (A)/MFR (P) is in the range of 0.1 to 1.5,

wherein

MFR (A) is the melt flow rate MFR 2 (230° C.) [g/10 min] measured according to ISO 1133 of the propylene copolymer (A),

MFR (P) is the melt flow rate MFR 2 (230° C.) [g/10 min] measured according to ISO 1133 of the propylene copolymer composition (P).

8. The blow molded article according to claim 1 , wherein the ratio MFR (A)/MFR (B) is in the range of 0.05 to 1.5

wherein

MFR (A) is the melt flow rate MFR 2 (230° C.) [g/10 min] measured according to ISO 1133 of the propylene copolymer (A),

MFR (B) is the melt flow rate MFR 2 (230° C.) [g/10 min] measured according to ISO 1133 of the propylene copolymer (B).

9. The blow molded article according to claim 1 , wherein corn (P)/com (A) is in the range of 1.0 to 6.0

wherein

com (A) is the comonomer content of the propylene copolymer (A) given in mol percent [mol-%],

com (P) is the comonomer content of the propylene copolymer composition (P) given in mol percent [mol-%].

10. The blow molded article according to claim 1 , wherein

(a) the blow molded article comprises the propylene copolymer composition (P) in an amount of at least 75.0 wt.-%, based on the total weight of the blow molded article,

and/or

(b) weight ratio between the propylene copolymer (A) and the propylene copolymer (B) [(A)/(B)] is in the range of 20/80 to 80/20.

11. The blow molded article according to claim 1 , wherein the blow molded article is an extrusion blow molded article.

12. The blow molded article according to claim 1 , wherein the blow molded article has

(a) a bottle appearance factor (BAF) before sterilization of in-equation (Ia):

65<BAF≦200  (Ia),

and/or

(b) a bottle appearance factor (BAF) after sterilization of in-equation (IIa):

125<BAF≦450  (IIa),

wherein

BAF is defined as:

BAF

=

C

×

G

H

wherein

H is the haze value

C is the clarity value, and

G is the gloss value

wherein haze and clarity values are measured according to ASTM D1003 and gloss is measured according to ASTM D 2457.

13. The blow molded article according to claim 11 , which is an extrusion blow molded article, wherein the extrusion blow molded article is a bottle or a container.

14. A method of preparing a blow molded article comprising blow molding a propylene copolymer composition (P),

the propylene copolymer composition (P) comprising

(a) a propylene copolymer (A) having a comonomer content of 0.1 to 2.5 mol-%, the comonomers are C 5 to C 12 α-olefins, and

(b) a propylene copolymer (B) having a comonomer content of 1.0 to 7.0 mol-%, the comonomers are C 5 to C 12 α-olefins, wherein further

(i) the comonomer content in the propylene copolymer (A) is lower compared to the comonomer content in the propylene copolymer (B),

(ii) the propylene copolymer composition (P) has a comonomer content of 0.6 to 1.7 mol-%, the comonomers are C 5 to C 12 α-olefins.