US 12,240,969 B2
Polypropylene composition with improved processability and impact strength
Jingbo Wang, Linz (AT); Markus Gahleitner, Linz (AT); Klaus Bernreitner, Linz (AT); and Pauli Leskinen, Linz (AT)
Assigned to BOREALIS AG, Vienna (AT)
Appl. No. 17/771,219
Filed by BOREALIS AG, Vienna (AT)
PCT Filed Oct. 22, 2020, PCT No. PCT/EP2020/079753
§ 371(c)(1), (2) Date Apr. 22, 2022,
PCT Pub. No. WO2021/078861, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 19204928 (EP), filed on Oct. 23, 2019.
Prior Publication US 2022/0389204 A1, Dec. 8, 2022
Int. Cl. C08L 23/14 (2006.01); B29B 7/90 (2006.01); B29B 9/06 (2006.01); B29C 45/00 (2006.01); B29K 23/00 (2006.01); B29K 105/16 (2006.01); B29K 509/02 (2006.01); B29L 31/00 (2006.01); B29L 31/30 (2006.01); C08J 3/00 (2006.01)
CPC C08L 23/142 (2013.01) [B29B 7/90 (2013.01); B29B 9/065 (2013.01); B29C 45/0001 (2013.01); C08J 3/005 (2013.01); B29K 2023/12 (2013.01); B29K 2105/16 (2013.01); B29K 2509/02 (2013.01); B29L 2031/30 (2013.01); B29L 2031/712 (2013.01); C08J 2323/14 (2013.01); C08J 2423/08 (2013.01); C08J 2423/14 (2013.01); C08L 2203/30 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01); C08L 2207/02 (2013.01); C08L 2314/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A polypropylene composition comprising
60 to 95 wt.-% of a first heterophasic propylene copolymer (A) comprising
78.0 to 92.0 wt.-% of a crystalline matrix (Al) being a propylene homo- or copolymer, said crystalline matrix corresponding to the crystalline fraction (CF) determined according to CRYSTEX QC method, ISO 6427-B and containing 0.0 to 2.0 wt.-% comonomer and
8.0 to 22.0 wt.-% of an amorphous propylene-ethylene elastomer (A2), optionally comprising C4-C12 alpha-olefin(s) as further comonomers, dispersed in said crystalline matrix (Al),
wherein (Al) and (A2) add up to 100 wt.-%, and wherein said amorphous propylene ethylene elastomer (A2) corresponds to the soluble fraction (SF) determined according to CRYSTEX QC method, ISO 6427-B and contains 15.0 to 30.0 wt.-% of comonomer,
said heterophasic propylene copolymer being characterised by a melt flow rate MFR2, determined according to ISO1133 at 230° C. and a load of 2.16 kg, of 30 to 120 g/10 min, and
5 to 40 wt.-% of an elastomeric ethylene/alpha-olefin random copolymer (B) characterized by an MFR2, determined according to ISO1133 at 190° C. and a load of 2.16 kg, of 0.1 to 100 g/10 min and a density in the range of 840 to below 900 kg/m3,
wherein (A) and (B) add up to 100 wt.-%.