US 12,084,567 B2
Polypropylene based composition with improved paintability
Jingbo Wang, Linz (AT); Klaus Bernreitner, Linz (AT); Daniela Mileva, Linz (AU); Georg Grestenberger, Linz (AT); and Markus Gahleitner, Linz (AT)
Assigned to BOREALIS AG, Vienna (AT)
Appl. No. 17/269,208
Filed by BOREALIS AG, Vienna (AT)
PCT Filed Aug. 23, 2019, PCT No. PCT/EP2019/072561
§ 371(c)(1), (2) Date Feb. 17, 2021,
PCT Pub. No. WO2020/048794, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 18193004 (EP), filed on Sep. 6, 2018.
Prior Publication US 2021/0179831 A1, Jun. 17, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 23/14 (2006.01); C08K 3/34 (2006.01); C08L 23/08 (2006.01); C08L 23/16 (2006.01); C08L 23/18 (2006.01)
CPC C08L 23/142 (2013.01) [C08K 3/34 (2013.01); C08L 23/0815 (2013.01); C08L 23/16 (2013.01); C08L 23/14 (2013.01); C08L 23/18 (2013.01); C08L 2205/03 (2013.01); C08L 2205/22 (2013.01); C08L 2207/02 (2013.01)] 14 Claims
 
1. A polypropylene based composition comprising:
(A) an amount from 40.0 to 85.0 wt % of a heterophasic propylene copolymer having a content of xylene cold soluble (XCS) fraction in a range of 15 wt % to 35 wt %, based on a total weight of the heterophasic propylene copolymer;
(B) an amount from 5.0 to 15.0 wt % of a random copolymer of propylene with comonomer units selected from the group consisting of ethylene and alpha-olefins having from 4 to 12 carbon atoms which has been polymerized in the presence of a single-site catalyst system and has a melting temperature Tm as measured in differential scanning calorimetry (DSC) of less than 140° C.;
(C) an amount from 5.0 to 25.0 wt % of an ethylene copolymer with alpha-olefin comonomer units having from 4 to 12 carbon atoms with a density of from 850 kg/m3 to 900 kg/m3−; and
(D) an amount from 5.0 to 25.0 wt % of an inorganic filler,
wherein the amounts of components (A), (B), (C), and (D) are all based on a total weight of the polypropylene based composition,
said polypropylene based composition having a melt flow rate (MFR2) as measured at 230° C. and 2.16 kg load in accordance with ISO 1133 in a range of 2.0 g/10 min to 20.0 g/10 min.