US 11,981,801 B2
Polypropylene composition
Jingbo Wang, Linz (AT); Simon Schwarzenberger, Linz (AT); Klaus Bernreitner, Linz (AT); and Markus Gahleitner, Linz (AT)
Assigned to BOREALIS AG, Vienna (AT)
Appl. No. 16/622,569
Filed by BOREALIS AG, Vienna (AT)
PCT Filed Jul. 13, 2018, PCT No. PCT/EP2018/069093
§ 371(c)(1), (2) Date Dec. 13, 2019,
PCT Pub. No. WO2019/012110, PCT Pub. Date Jan. 17, 2019.
Claims priority of application No. 17181345 (EP), filed on Jul. 14, 2017.
Prior Publication US 2023/0242748 A1, Aug. 3, 2023
Int. Cl. C08L 23/14 (2006.01); C08J 5/18 (2006.01)
CPC C08L 23/142 (2013.01) [C08J 5/18 (2013.01); C08J 2323/14 (2013.01); C08J 2423/14 (2013.01); C08L 2203/162 (2013.01); C08L 2205/025 (2013.01)] 12 Claims
 
1. Polypropylene composition comprising a blend of:
(A) 50.0 to 99.0 wt % of a propylene-ethylene random copolymer with an ethylene content in the range of from 0.1 to 12.0 wt %, an MFR2 (230° C., 2.16 kg, ISO1133) in a range of from 0.5 to 60.0 g/10 min and a melting temperature Tm (DSC) is in the range of from 135° C. to 155° C., and
(B) 1.0 to 50.0 wt % of a propylene-hexene random copolymer with a hexene content in the range of from 0.1 to 12.0 wt % and an MFR2 (230° C., 2.16 kg, ISO1133) in a range of from 25 to 60.0 g/10 min and a melting temperature Tm (DSC) is in the range of from 120° C. to 140° C., whereby
(i) the melting temperature of the propylene-hexene random copolymer (B) is lower than the melting temperature of the propylene-ethylene random copolymer (A) and
(ii) the MFR2 (230° C., 2.16 kg, ISO1133) of the blend is in a range of from 0.5 to 60.0 g/10 min.