US 12,146,036 B2
Polypropylene-based compositions with transparency and elongational properties
Alain Standaert, Seneffe (BE); and Maryline Costa, Seneffe (BE)
Assigned to TOTALENERGIES ONETECH, Courbevoie (FR)
Appl. No. 18/688,443
Filed by TOTALENERGIES ONETECH, Courbevoie (FR)
PCT Filed Sep. 2, 2022, PCT No. PCT/EP2022/074533
§ 371(c)(1), (2) Date Mar. 1, 2024,
PCT Pub. No. WO2023/036716, PCT Pub. Date Mar. 16, 2023.
Claims priority of application No. 21195855 (EP), filed on Sep. 9, 2021.
Prior Publication US 2024/0327581 A1, Oct. 3, 2024
Int. Cl. C08K 5/1575 (2006.01); C08J 3/00 (2006.01); C08J 3/20 (2006.01); C08K 5/14 (2006.01); C08L 23/12 (2006.01); C08L 23/14 (2006.01)
CPC C08J 3/201 (2013.01) [C08J 3/005 (2013.01); C08K 5/14 (2013.01); C08K 5/1575 (2013.01); C08L 23/12 (2013.01); C08L 23/14 (2013.01); C08J 2323/12 (2013.01); C08J 2323/14 (2013.01); C08L 2205/025 (2013.01); C08L 2207/20 (2013.01)] 15 Claims
OG exemplary drawing
 
1. Process to produce a polypropylene composition characterized in that it comprises the steps of:
providing from 30 to 75 wt. % of a component A based on the total weight of the polypropylene composition, wherein the component A is selected from one or more propylene homopolymer resins, one or more random propylene copolymer resins comprising propylene and one or more comonomers selected from ethylene and C4-C20 alpha-olefin; wherein the content of the one or more comonomers is at most 1.0 wt. % based on the total weight of the random propylene copolymer resins, and any mixture thereof; and wherein the component A has a melt index (MI2) ranging from 2.0 to 100.0 g/10 min as determined according to ISO 1133-1:2011 at a temperature of 230° C. and under a load of 2.16 kg;
providing from 25 to 70 wt. % of a component B based on the total weight of the polypropylene composition, the component B being one or more random propylene copolymer resins comprising propylene and one or more comonomers selected from ethylene and C4-C20 alpha-olefin; wherein the content of the one or more comonomers of the component B is at least 5.0 wt. % based on the total weight of the component B; and
melt-blending the components to form a polypropylene composition having a comonomer content ranging from 2.5 to 4.5 wt. % based on the total weight of the polypropylene composition.