US 12,441,875 B2
Heterophasic propylene copolymer composition with low gloss
Dimphna Johanna Maria van Beek, Sittard (NL); Christelle Marie Hélène Grein, Aachen (DE); Rob Donners, Brunssum (NL); Gerard Jan Eduard Biemond, Brunssum (NL); and Zahra Fahimi, Maastricht (NL)
Assigned to SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom (NL)
Appl. No. 17/784,370
Filed by SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom (NL)
PCT Filed Dec. 18, 2020, PCT No. PCT/EP2020/087079
§ 371(c)(1), (2) Date Jun. 10, 2022,
PCT Pub. No. WO2021/130121, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 19219581 (EP), filed on Dec. 24, 2019.
Prior Publication US 2023/0014149 A1, Jan. 19, 2023
Int. Cl. C08L 23/16 (2006.01); C08L 23/12 (2006.01)
CPC C08L 23/12 (2013.01) [C08L 23/16 (2013.01); C08L 2205/025 (2013.01); C08L 2207/02 (2013.01)] 17 Claims
 
1. A polymer composition comprising a first heterophasic propylene copolymer (a), a second heterophasic propylene copolymer (b) and optionally an inorganic filler, wherein the amount of the first heterophasic propylene copolymer (a) is in the range from 4.6 to 70.4 wt % based on the total amount of the polymer composition, wherein the amount of the second heterophasic propylene copolymer (b) is in the range from 4.3 to 69.8 wt % based on the total amount of the polymer composition,
wherein the first heterophasic propylene copolymer (a) comprises:
from 80 to 92 wt % of a propylene polymer (al);
from 8 to 20 wt % of an ethylene-a-olefin copolymer (a2), wherein the moiety of α-olefin in the ethylene-α-olefin copolymer (a2) is derived from at least one a-olefin having 3 to 20 carbon atoms;
wherein the melt flow index (MFI) of the first heterophasic propylene copolymer (a) is in the range from 40 to 120 dg/min as determined according to ISO1133-1:2011 at 230° C. with a 2.16 kg load, wherein the amount of the xylene-soluble portion of the first heterophasic propylene copolymer (a) is in the range from 10 to 27 wt % based on the total amount of the first heterophasic propylene copolymer (a) as determined according to ISO16152:2005, wherein the ratio between the intrinsic viscosity of the xylene-soluble part IVCXS and the intrinsic viscosity of the xylene-insoluble part IVCXI of the first heterophasic propylene copolymer (a) is in the range between from 3.1 to 7.2 wherein IVcxs and IVcxI are measured according to ISO1628-1:2009 and ISO1628-3:2010 respectively,
wherein the second heterophasic propylene copolymer (b) comprises:
1 from 65 to 81 wt % of a propylene polymer (b1),
from 19 to 35 wt % of an ethylene-a-olefin copolymer (b2), wherein the moiety of α-olefin in the ethylene-α-olefin copolymer (a2) is derived from at least one α-olefin having 3 to 20 carbon atoms,
wherein the MFI of the second heterophasic propylene copolymer (b) is in the range from 10 to 100 dg/min as determined according to ISO1133-1:2011 at 230°° C. with 2.16 kg load,
wherein the MFI of the polymer composition is in the range from 5 to 100 dg/min as determined according to ISO1133-1:2011 at 230° C. with 2.16 kg load.