	US 12,084,565 B2
	Composition containing recycled materials for pipes
Franz Ruemer, Linz (AT); Luca Boragno, Linz (AT); Stefan Schiesser, Linz (AT); Guenter Dreiling, Linz (AT); Christian Hollsten, Porvoo (FI); Siegfried Liedauer, Linz (AT); Andrei Ollikainen, Porvoo (FI); and Thierry Pezard, Courbevoie (FR)
Assigned to Borealis AG, Vienna (AT)
Appl. No. 17/593,630
Filed by Borealis AG, Vienna (AT)
PCT Filed Mar. 16, 2020, PCT No. PCT/EP2020/057079 § 371(c)(1), (2) Date Sep. 22, 2021, PCT Pub. No. WO2020/200730, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 19166155 (EP), filed on Mar. 29, 2019.
Prior Publication US 2022/0162430 A1, May 26, 2022
Int. Cl. C08L 23/12 (2006.01)

CPC C08L 23/12 (2013.01) [C08L 2203/18 (2013.01); C08L 2205/03 (2013.01); C08L 2207/02 (2013.01); C08L 2207/10 (2013.01); C08L 2207/20 (2013.01)]

16 Claims

1. A composition comprising a recycled polymer composition (RPC) and a heterophasic propylene copolymer (HECO), the composition is obtained by blending,

wherein

(a) the recycled polymer composition (RPC) comprises at least 80 wt.-%, based on the weight of the recycled polymer composition (RPC), of a recycled polypropylene, and

(b) the heterophasic propylene copolymer (HECO) has

(b1) a xylene cold soluble (XCS) fraction determined at 25° C. according to ISO 16152 in the range of 5.0 to 18 wt.-%, and

(b2) a melt flow rate MFR₂(230° C./2.16 kg) measured according to ISO 1133 in the range of 0.05 to 1.5 g/10 min,

wherein further

(a) the weight ratio between the heterophasic propylene copolymer (HECO) and the recycled polymer composition (RPC) [(HECO)/(RPC)] is in the range of 1.1 to 7.0,

(b) the percentage by weight of the heterophasic propylene copolymer (HECO) together with the recycled polymer composition (RPC) [(HECO)+(RPC)], based on the weight of the composition, is at least 85 wt.-%, and

(c) the composition has a tensile modulus measured according to ISO 527-2 in the range of 1100 to 1600 MPa and/or a content of limonene as determined using solid phase microextraction (HS-SPME-GC-MS) of from 0.5 to 40 mg/kg.