Process to produce an additived composition of polyethylene comprising post-consumer resin and caps or closures made from this composition

    公开(公告)号:US12129369B2

    公开(公告)日:2024-10-29

    申请号:US18554488

    申请日:2022-04-12

    IPC分类号: C08L23/08

    摘要: The disclosure relates to a process to produce a composition of polyethylene comprising post-consumer resin for the production of caps and closures, comprising the steps of providing from 20 wt. % to 85 wt. % of a component A being one or more polyethylene post-consumer resins having a melt index ranging from 0.8 to 3.0 g/10 min, and a density ranging from 0.940 to 0.965 g/cm3: providing a component B being a polyethylene resin having a melt index (MI2) ranging from 0.5 to 3.5 g/10 min. and a density ranging from 0.940 to 0.965 g/cm3: providing one or more antioxidants: and blending the components and the one or more antioxidants to form a composition of polyethylene having a melt index ranging from 1.0 to 3.2 g/10 min; wherein the composition of polyethylene is having a z average molecular weight (Mz) of at most 390.000 g/mol as determined by gel permeation chromatography.

    Process to Produce a Composition of Polyethylene Comprising Recycled Post-Consumer Resin and Caps or Closures Made From This Composition

    公开(公告)号:US20230174755A1

    公开(公告)日:2023-06-08

    申请号:US17768804

    申请日:2020-10-13

    IPC分类号: C08L23/08

    摘要: The disclosure relates to a process to produce a composition of polyethylene comprising post-consumer resin for the production of caps and closures , comprising in the steps of providing from 20 wt.% to 85 wt.% of a component A being one or more polyethylene post-consumer resins having a melt index ranging from 0.8 to 3.0 g/10 min, and a density ranging from 0.940 to 0.965 g/cm3; providing a component B being a polyethylene resin having a melt index (MI2) ranging from 0.2 to 1.2 g/10 min, and a density ranging from 0.935 to 0.955 g/cm3; and a multimodal molecular weight distribution, wherein the component B is selected to have a melt index that is equal or inferior to the melt index (MI2) of the component A and to have a molecular weight distribution Mw/Mn which is at most 14.0 as determined by gel permeation chromatography; and blending the components to form a composition having a melt index ranging from 0.8 to 3.0 g/10 min; wherein the composition has an environmental stress crack resistance of at least 360 hours according to ASTM D1693-15 at 100% Igepal and 50° C. and a weight-average molecular weight Mw of at least 90,000 g/mol.

    POLYPROPYLENE COMPOSITIONS
    7.
    发明公开

    公开(公告)号:US20230323101A1

    公开(公告)日:2023-10-12

    申请号:US18022775

    申请日:2021-10-14

    IPC分类号: C08L23/14

    摘要: 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.

    HIGH IMPACT MONOVINYLIDENE AROMATIC POLYMERS

    公开(公告)号:US20240309192A1

    公开(公告)日:2024-09-19

    申请号:US18263611

    申请日:2022-01-25

    发明人: Eloïne NPETGAT

    IPC分类号: C08L25/06

    摘要: The present invention is related to a rubber-modified monovinylidene aromatic polymer composition comprising: I) a matrix comprising monovinylidene aromatic polymer, and II) from 5 to 25% by weight of rubber in the form of discrete rubber particles dispersed within the matrix, wherein the rubber particles comprise a blend of at least two polybutadienes as well as graft- and block copolymers of polybutadiene and monovinylidene aromatic polymer segments, said rubber particles exhibit: —an average particle size by volume (D50) comprised between 1.5 and 5.5 μm, as measured by laser light scattering; wherein said blend of at least two poly butadienes comprises: —at least 50% by weight of one or more polybutadiene(s) with a cis-1,4 structure content of at least 80% by weight and —at most 50% by weight of one or more polybutadiene(s) with a trans-1-4 structure content of at least 25% by weight and a 1,2-vinyl content of at least 5% by weight; said of at least two polybutadienes, as such and prior to being part of the rubber-modified monovinylidene aromatic (co)polymer, blend being characterized by a dynamic solution viscosity, comprised between 50 and 160 mPa·s, as determined by Brookfield viscometer according to ISO 2555, at a concentration of 5.43% by weight in toluene. The invention further is related to a method for the preparation of the rubber-modified monovinylidene aromatic polymer composition.

    PROCESS TO PRODUCE AN ADDITIVED COMPOSITION OF POLYETHYLENE COMPRISING POST-CONSUMER RESIN AND CAPS OR CLOSURES MADE FROM THIS COMPOSITION

    公开(公告)号:US20240209195A1

    公开(公告)日:2024-06-27

    申请号:US18554488

    申请日:2022-04-12

    IPC分类号: C08L23/08

    摘要: The disclosure relates to a process to produce a composition of polyethylene comprising post-consumer resin for the production of caps and closures, comprising the steps of providing from 20 wt. % to 85 wt. % of a component A being one or more polyethylene post-consumer resins having a melt index ranging from 0.8 to 3.0 g/10 min, and a density ranging from 0.940 to 0.965 g/cm3: providing a component B being a polyethylene resin having a melt index (MI2) ranging from 0.5 to 3.5 g/10 min. and a density ranging from 0.940 to 0.965 g/cm3: providing one or more antioxidants: and blending the components and the one or more antioxidants to form a composition of polyethylene having a melt index ranging from 1.0 to 3.2 g/10 min; wherein the composition of polyethylene is having a z average molecular weight (Mz) of at most 390.000 g/mol as determined by gel permeation chromatography.