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公开(公告)号:US20240327581A1
公开(公告)日:2024-10-03
申请号:US18688443
申请日:2022-09-02
Applicant: TOTALENERGIES ONETECH
Inventor: Alain STANDAERT , Maryline COSTA
CPC classification number: C08J3/201 , C08J3/005 , C08K5/14 , C08K5/1575 , C08L23/12 , C08L23/14 , C08J2323/12 , C08J2323/14 , C08L2205/025 , C08L2207/20
Abstract: The disclosure provides a process to produce a polypropylene composition remarkable in that it comprises providing from 30 to 75 wt. % of a component A based on the total weight of the composition, the component A being one or more propylene homopolymer resins; providing from 25 to 70 wt. % of a component B based on the total weight of the 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 comonomers is at least 5.0 wt. % based on the total weight of the component B; melt-blending the components to form the composition having a comonomer content ranging from 2.5 to 4.5 wt. % based on the total weight of the composition. The disclosure also relates to such a composition and an article made from said composition.
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公开(公告)号:US20230323101A1
公开(公告)日:2023-10-12
申请号:US18022775
申请日:2021-10-14
Applicant: TOTALENERGIES ONETECH BELGIUM
Inventor: Thomas COUSTHAM , Alain STANDAERT , Aurélien VANTOMME , Armelle SIGWALD
IPC: C08L23/14
CPC classification number: C08L23/14 , C08L2205/025 , C08L2314/06
Abstract: The invention relates to a polypropylene composition comprising: (a) a first metallocene-catalyzed polypropylene (RPP-A) which is homopolymer, or a random copolymer of propylene and of a co-monomer; and (b) a second metallocene-catalyzed polypropylene (RPP-B) which is a random copolymer of propylene and of a co-monomer; wherein said polypropylene composition has:- a total co-monomer content of at least 1.1% by weight relative to the total weight of said polypropylene composition, as determined by 13C NMR analysis, said co-monomer being an alpha-olefin different from propylene;- a melting temperature Tm of at least 130° C., measured by DSC; - a crystallization temperature Tc of at least 95.0° C., measured by DSC; - a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) [Mw/Mn] of at least 4.50;- a ratio of z-average molecular weight (Mz) to weight average molecular weight (Mw) [Mz/Mw] of at least 2.10; and- a co-monomer distribution ratio R(Mz)/R(Mn) higher than 0.995, wherein R(Mz) is the ratio at Mz of the IR signal measured at 2959 cm-1 on the signal at 2928 cm-1, and R(Mn) is the ratio at Mn of the IR signal measured at 2959 cm-1 on the signal at 2928 cm-1, as determined by IR-detected gel permeation chromatography and- a xylene soluble content (XS) of at most 3.0% by weight. The present invention also relates to a process for the preparation of said polypropylene composition. The present invention also relates to an article comprising said polypropylene composition.
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