Soft bottles
Molded article comprising a propylene copolymer having a xylene cold soluble content (XCS) in the range of 35 to 60 wt.-% and a comonomer content in the range of 7.0 to 17.0 wt-%, wherein further the propylene copolymer fulfills inequation (I), wherein Co (total) is the comonomer content [wt.-%] of the propylene copolymer Co (XCS) is the comonomer content [wt.-%] of the xylene cold soluble fraction (XCS) of the propylene copolymer. Co ( total ) Co ( XCS ) ≥ 0.50 ( I )
1. Molded article comprising a propylene copolymer having:
(a) a xylene cold soluble content (XCS) determined according ISO 16152 (25° C.) in the range of 35 to 60 wt. %,
(b) a comonomer content in the range of 7.0 to 17.0 wt. %,
wherein further the propylene copolymer fulfills inequation (I):
Co
(
total
)
Co
(
XCS
)
≥
0.50
wherein Co (total) is the comonomer content [wt. %] of the propylene copolymer,
Co (XCS) is the comonomer content [wt. %] of the xylene cold soluble fraction (XCS) of the propylene copolymer, and
wherein the propylene copolymer is a heterophasic propylene copolymer (RAHECO) comprising a matrix (M) and an elastomeric propylene copolymer (E) dispersed in said matrix (M), wherein said matrix (M) is a random propylene copolymer (R-PP) having a comonomer content of at least 4.0 wt. %.
2. Molded article according to claim 1 , wherein the comonomer content of xylene cold soluble (XCS) fraction of the propylene copolymer is in the range of 8.0 to 20.0 wt. %.
3. Molded article according to claim 1 , wherein the amount of the propylene copolymer in the molded article is at least 50 wt. % based on the total weight of the molded article.
4. Molded article according to claim 1 , wherein the propylene copolymer comprises:
(a) a melting temperature Tm determined by differential scanning calorimetry (DSC) in the range of 145 to 160° C., and/or
(b) an intrinsic viscosity (IV) of the xylene cold soluble (XCS) fraction determined according to DIN ISO 1628/1 (in Decalin at 135° C.) in the range of 1.5 to below 2.8 dl/g.
5. Molded article according to claim 1 , wherein the propylene copolymer has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 0.5 to 2.5 g/10 min.
6. Molded article according to claim 1 , wherein the propylene copolymer comprises:
(a) a flexural modulus measured according to ISO 178 of not more than 350 MPa, and/or
(b) a haze before sterilization determined according to ASTM D 1003-07 of below 30%, and/or
(c) a haze after sterilization determined according to ASTM D 1003-07 of below 50%.
7. Molded article according to claim 1 , wherein the weight ratio between the matrix (M) and the elastomeric propylene copolymer (E) is 50/50 to 80/20.
8. Molded article according to claim 1 , wherein,
(a) the comonomer content of the random propylene copolymer (R-PP) is in the range of 4.0 to 15.0 wt.-%, and/or
(b) the propylene copolymer fulfills inequation (II):
Co
(
total
)
Co
(
RPP
)
≥
0.9
wherein
Co (total) is the comonomer content [wt. %] of the propylene copolymer, and
Co (RPP) is the comonomer content [wt. %] of the random propylene copolymer (R-PP), and/or
(c) the random propylene copolymer (R-PP) has a xylene cold soluble (XCS) fraction in the range of 20 to 45 wt. %.
9. Molded article according to claim 1 , wherein the random propylene copolymer (R-PP) of the heterophasic propylene copolymer (RAHECO) comprises at least two different fractions, a first random propylene copolymer fraction (R-PP1) and a second random propylene copolymer fraction (R-PP2), wherein further:
(a) the weight ratio between the first random propylene copolymer fraction (R-PP1) and the second random propylene copolymer fraction (R-PP2) 20/80 to 80/20, and/or
(b) the first random propylene copolymer fraction (R-PP1) has a comonomer content in the range 0.5 to 5.0 wt. %, and/or
(c) the second random propylene copolymer fraction (R-PP2) has a comonomer content in the range 7.0 to 20.0 wt. %.
10. Molded article according to claim 1 , wherein the elastomeric propylene copolymer (E) of the heterophasic propylene copolymer (RAHECO) has a comonomer content in the range of 10.0 to 22.0 wt. %.
11. Molded article according to claim 1 , wherein the article is a blow molded article.
12. Molded article according to claim 1 , wherein the article is a bottle.
13. Molded article comprising a propylene copolymer having:
(a) a xylene cold soluble content (XCS) determined according ISO 16152 (25° C.) in the range of 35 to 60 wt. %, and
(b) a comonomer content in the range of 7.0 to 17.0 wt. %,
wherein further the comonomer content of xylene cold soluble (XCS) fraction of the propylene copolymer is in the range of 8.0 to 20.0 wt. %, and
wherein the propylene copolymer is a heterophasic propylene copolymer (RAHECO) comprising a matrix (M) and an elastomeric propylene copolymer (E) dispersed in said matrix (M), wherein said matrix (M) is a random propylene copolymer (R-PP) having a comonomer content of at least 4.0 wt. %.
14. Molded article according to claim 13 , wherein the propylene copolymer fulfills inequation (I):
Co
(
total
)
Co
(
XCS
)
≥
0.50
wherein Co (total) is the comonomer content [wt. %] of the propylene copolymer, and
Co (XCS) is the comonomer content [wt. %] of the xylene cold soluble fraction (XCS) of the propylene copolymer.