	US 12,404,394 B2
	High flow polypropylene composition for injection moulding applications
Thomas Lummerstorfer, Linz (AT); Claudia Kniesel, Linz (AT); Daniela Mileva, Linz (AT); Thomas Horill, Schwechat-Mannswörth (AT); Mahdi Abbasi, Linz (AT); Cornelia Anita Tranninger, Linz (AT); Markus Gahleitner, Linz (AT); and Francis Reny Costa, Linz (AT)
Assigned to BOREALIS AG, Vienna (AT)
Appl. No. 18/847,967
Filed by BOREALIS AG, Vienna (AT)
PCT Filed Mar. 21, 2023, PCT No. PCT/EP2023/057126 § 371(c)(1), (2) Date Sep. 17, 2024, PCT Pub. No. WO2023/180272, PCT Pub. Date Sep. 28, 2023.
Claims priority of application No. 22163738 (EP), filed on Mar. 23, 2022.
Prior Publication US 2025/0109287 A1, Apr. 3, 2025
Int. Cl. C08L 23/16 (2006.01); C08F 2/00 (2006.01); C08F 210/06 (2006.01); C08F 210/16 (2006.01); C08K 3/34 (2006.01); C08L 23/12 (2006.01)

CPC C08L 23/12 (2013.01) [C08F 2/001 (2013.01); C08F 210/06 (2013.01); C08F 210/16 (2013.01); C08K 3/346 (2013.01); C08L 23/16 (2013.01); C08K 2201/005 (2013.01); C08L 2205/025 (2013.01); C08L 2205/035 (2013.01); C08L 2207/02 (2013.01); C08L 2314/02 (2013.01)]

14 Claims

1. A polypropylene composition comprising

(A) at least 95.0 wt % of a heterophasic propylene copolymer; and

(B) up to 1.5 wt % of a particulate inorganic nucleating agent,

wherein all percentages refer to a total composition, and wherein

the heterophasic propylene copolymer (A) comprises a matrix phase and an elastomeric phase dispersed therein and

the polypropylene composition has

a soluble fraction (SF) and a crystalline fraction (CF), determined according to CRYSTEX QC analysis;

a soluble fraction (SF) content determined according to CRYSTEX QC analysis in a range from 15.0 wt % to 30.0 wt %;

an ethylene content of the soluble fraction C2(SF), as determined by FT-IR spectroscopy calibrated by quantitative ¹³C-NMR spectroscopy, in a range from 25.0 to 40.0 wt %;

an intrinsic viscosity of the soluble fraction iV(SF), as measured in decalin according to DIN ISO 1628/1 at 135° C., of 2.0 dl/g to 3.5 dl/g;

a ratio of ethylene contents of the soluble fraction and crystalline fraction (C2(SF)/C2(CF)) of 11.0 to 15.0; and

a melt flow rate MFR₂(230° C., 2.16 kg, ISO 1133) of 75 to 250 g/10 min.