	US 11,981,782 B2
	Propylene butene copolymer
Jingbo Wang, Linz (AT); Markus Gahleitner, Linz (AT); Klaus Bernreitner, Linz (AT); Pauli Leskinen, Porvoo (FI); and Matthias Hoff, Linz (AT)
Assigned to BOREALIS AG, Vienna (AT)
Appl. No. 17/292,062
Filed by BOREALIS AG, Vienna (AT)
PCT Filed Nov. 14, 2019, PCT No. PCT/EP2019/081330 § 371(c)(1), (2) Date May 7, 2021, PCT Pub. No. WO2020/099566, PCT Pub. Date May 22, 2020.
Claims priority of application No. 18206445 (EP), filed on Nov. 15, 2018.
Prior Publication US 2021/0395474 A1, Dec. 23, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 210/06 (2006.01); C08F 4/76 (2006.01); C08F 210/08 (2006.01); C08F 297/08 (2006.01); C08J 5/18 (2006.01); C08L 23/14 (2006.01); C08L 23/20 (2006.01)

CPC C08J 5/18 (2013.01) [C08F 297/083 (2013.01); C08F 4/76 (2013.01); C08F 210/06 (2013.01); C08F 210/08 (2013.01); C08F 2420/00 (2013.01); C08J 2353/00 (2013.01); C08L 23/14 (2013.01); C08L 23/20 (2013.01); C08L 2205/025 (2013.01)]

13 Claims

1. A multimodal propylene butene random copolymer having a melt flow rate (MFR₂) of 1.0 to 20.0 g/10 min when determined under 2.16 kg load at 230° C. and a butene content of 1.5 to 8.0 wt %, wherein said copolymer is prepared using a single site catalyst and wherein said copolymer comprises:

(i) 30 to 70 wt % of a propylene butene copolymer (A) having an MFR₂of 0.5 to 20.0 g/10 min when determined under 2.16 kg load at 230° C. and a butene content of 0.5 to 10.0 wt %; and

(ii) 70 to 30 wt % of a propylene butene copolymer (B) having an MFR₂of 0.5 to 20.0 g/10 min when determined under 2.16 kg load at 230° C. and a butene content of 1.0 to 8.0 wt %;

wherein copolymers (A) and (B) are different and wherein said multimodal copolymer is substantially free of ethylene.