US 12,275,837 B2
Propylene based polymer composition
Claudio Cavalieri, Ferrara (IT); Paola Massari, Ferrara (IT); Isabella Maria Vittoria Camurati, Ferrara (IT); Roberto Pantaleoni, Ferrara (IT); Gianni Collina, Ferrara (IT); Gianni Vitale, Ferrara (IT); Marco Ciarafoni, Ferrara (IT); and Benedetta Gaddi, Ferrara (IT)
Assigned to Basell Poliolefine Italia S.r.l., Milan (IT)
Appl. No. 17/617,771
Filed by BASELL POLIOLEFINE ITALIA S.R.L., Milan (IT)
PCT Filed May 26, 2020, PCT No. PCT/EP2020/064491
§ 371(c)(1), (2) Date Dec. 9, 2021,
PCT Pub. No. WO2020/249388, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 19179927 (EP), filed on Jun. 13, 2019.
Prior Publication US 2022/0235212 A1, Jul. 28, 2022
Int. Cl. C08F 210/16 (2006.01); C08J 5/18 (2006.01); C08L 23/16 (2006.01); C08F 2/00 (2006.01); C08F 210/06 (2006.01)
CPC C08L 23/16 (2013.01) [C08F 210/16 (2013.01); C08J 5/18 (2013.01); C08F 2/001 (2013.01); C08F 210/06 (2013.01); C08L 2201/10 (2013.01); C08L 2203/162 (2013.01); C08L 2205/02 (2013.01)] 15 Claims
 
1. A propylene polymer composition comprising:
a) from 15 wt. % to 35 wt. %, based upon a total weight of the propylene polymer composition, of a propylene 1-hexene copolymer containing from 6.2 to 8.5% by weight, based upon a total weight of the propylene 1-hexene copolymer, of 1-hexene derived units and having a melt flow rate (MFR, measured according to ASTM D 1238-13, 230° C./2.16 kg, from 3.5 to 8.5 g/10 min;
b) from 15 wt. % to 35 wt. %, based upon the total weight of the propylene polymer composition, of a propylene 1-hexene copolymer containing from 10.4 wt. % to 14.5 wt. %, based upon a total weight of the propylene 1-hexene copolymer, of 1-hexene derived units and having a Melt Flow Rate melt flow rate (MFR, measured according to ASTM D 1238-13, 230° C./2.16 kg from 3.5 to 8.5 g/10 min; and
c) from 38 wt. % to 68 wt. %, based upon the total weight of the propylene polymer composition, of a propylene ethylene copolymer containing from 3.4 wt. % to 5.7 wt. %, based upon a total weight of the propylene ethylene copolymer, of ethylene derived units and having a melt flow rate (MFR, measured according to ASTM D 1238-13, 230° C./2.16 kg from 3.5 to 12.0 g/10 min,
wherein a sum of an amount of a), b) and c) is 100; and
i) a total amount of 1-hexene derived units of components a) and b) ranges from 9.4 wt. % to 11.6 wt. %;
ii) the propylene polymer composition has a xylene soluble content at 25° C. ranging from 14.2 wt. % to 19.3 wt. %;
iii) the 1-hexene derived units content of the propylene polymer composition ranges from 3.7 wt. % to 6.4 wt. %;
iv) the propylene polymer composition has a melting point ranging from 128° C. to 135° C., measured by DSC; and
v) component c) has a xylene soluble content at 25° C. ranging from 3.7 wt. % to 7.8 wt. %.