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    Random propylene polymer composition and use in extrusion blow moulding
    12.
    发明授权
    Random propylene polymer composition and use in extrusion blow moulding 有权

    公开(公告)号：US12234351B2

    公开(公告)日：2025-02-25

    申请号：US17423407

    申请日：2020-01-15

    Applicant: BOREALIS AG

    Inventor： Jingbo Wang ,  Markus Gahleitner ,  Friedrich Berger ,  Karlheinz Friedrich

    IPC: C08L23/14 ,  B29C49/04 ,  C08F2/00 ,  C08F4/646 ,  C08F4/649 ,  C08F4/654 ,  C08F210/02 ,  C08F210/14 ,  B29K23/00 ,  B29L31/00

    Abstract: The present invention is directed to a propylene polymer composition comprising at least one propylene copolymer (C-PP), and an α-nucleating agent (NU), wherein the propylene copolymer (C-PP) comprises two propylene copolymer fractions (PP1) and (PP2), wherein propylene copolymer fraction (PP1) is contained in the propylene copolymer (C-PP) in an amount of 30 to 70 wt. % and the propylene copolymer fraction (PP2) is contained in the propylene copolymer (C-PP) in an amount of 70 to 30 wt. %, the comonomer content of propylene copolymer fraction (PP1) is in the range of 0.5 to 2.5 wt.-% and the comonomer content of the propylene copolymer fraction (PP1) is lower compared to the comonomer content of the propylene copolymer fraction (PP2), and the propylene polymer composition has (a) a melt flow rate MFR2 (230° C.) measured according to according to ISO 1133 of 1 to 5 g/10 min., and (b) a comonomer content of 4.0 to 8.0 wt. %, the comonomer(s) being ethylene and/or at least one C4 to C12 α-olefin. The above propylene polymer composition has improved impact and optical properties. The invention further provides a method of producing the above propylene polymer composition and an extrusion blow molded article comprising the above propylene polymer composition.

    ARTICLES WITH HIGH RIGIDITY AND LOW WARPAGE COMPRISING HETEROPHASIC PROPYLENE POLYMER COMPOSITION AND USES THEREFOR
    13.
    发明申请
    ARTICLES WITH HIGH RIGIDITY AND LOW WARPAGE COMPRISING HETEROPHASIC PROPYLENE POLYMER COMPOSITION AND USES THEREFOR 有权

    公开(公告)号：US20220298341A1

    公开(公告)日：2022-09-22

    申请号：US17619013

    申请日：2020-06-12

    Applicant: Borealis AG

    Inventor： Friedrich Berger ,  Juliane Braun ,  Daniela Mileva ,  Anton Sageder ,  Claudia Kniesel

    IPC: C08L23/12

    Abstract: The present invention is directed to articles comprising a heterophasic polypropylene composition. The articles exhibit a combination of high stiffness, good dimensional stability, low shrinkage and reduced warpage properties and fast cycle times. Such articles are suitable in the rigid packaging area. The articles comprise a polypropylene composition comprising a heterophasic propylene copolymer which comprises a) a matrix phase (A) comprising at least one propylene homopolymer and/or a propylene copolymer, and b) a disperse phase (B) comprising a propylene copolymer rubber dispersed in the matrix phase (A), wherein the propylene copolymer rubber of the disperse phase (B) has a comonomer content of 30 to 55 wt. %, wherein the weight ratio of the matrix phase (A) and the disperse phase (B) is from 20:80 to 80:20; and the polypropylene composition has (i) a melt flow rate MFR2 of 1 g/10 min to 500 g/10 min, determined according to ISO 1133 (230° C., 2.16 kg load); and the article has (ii) a half-time of crystallisation t1/2 of 1 to 25 msec, measured at 80° C. by fast scanning calorimeter. The invention further relates to a process for preparing such a heterophasic polypropylene composition and its use for e.g. molded articles, in particular injection molded articles such as thin-walled containers.

    LOW STRESS WHITENING POLYPROPYLENE COMPOSITION
    14.
    发明申请
    LOW STRESS WHITENING POLYPROPYLENE COMPOSITION 有权

    公开(公告)号：US20220195166A1

    公开(公告)日：2022-06-23

    申请号：US17603166

    申请日：2020-03-27

    Applicant: Borealis AG

    Inventor： Jingbo Wang ,  Markus Gahleitner ,  Friedrich Berger

    IPC: C08L23/16 ,  C08F2/00 ,  C08L23/12 ,  C08J5/18

    Abstract: The present invention relates to a heterophasic polyolefin composition and articles produced therefrom with improved mechanical and optical properties, particularly low stress whitening. The present invention further relates to a process for the preparation of such a heterophasic polyolefin composition, articles made therefrom, particularly films, and uses of the heterophasic polyolefin composition. The heterophasic propylene copolymer composition comprises a heterophasic propylene copolymer (HECO) comprising a matrix (M) being a propylene homopolymer (H-PP) and an elastomeric propylene copolymer (EPC) dispersed in said matrix (M), wherein the heterophasic propylene copolymer (HECO) has (a) a melt flow rate MFf3/4 (2.16 kg, 230° C.) measured according to ISO 1133 in the range of 5.0 to 25.0 g/10 min, (b) a soluble fraction content (SF) determined by TREF fractionation on CRYSTEX QC, Polymer Char (Valencia, Spain) in the range of 10.0 to 25.0 wt. %, (c) an ethylene content of the soluble fraction content (SF) in the range of from 18 wt. % to less than 39 wt. %, (d) an intrinsic viscosity (IV) determined according to DIN ISO 1628/1 (in decalin at 135° C.) of the soluble fraction (SF) in the range of from 1.5 to 2.5 dl/g, (e) a crystalline fraction content (CF) determined by TREF fractionation on CRYSTEX QC, Polymer Char (Valencia, Spain) in the range of 75 to 90 wt. %, (f) an ethylene content of the crystalline fraction content (CF) of from 0.1 wt. % to 5.0 wt. %, and the heterophasic propylene copolymer composition has a total ethylene content in the range of from 7 to 30 wt. %, determined by quantitative NMR spectroscopy.

    Polypropylene compositions with low fogging
    16.
    发明授权
    Polypropylene compositions with low fogging 有权

    公开(公告)号：US10781304B2

    公开(公告)日：2020-09-22

    申请号：US16308199

    申请日：2017-06-20

    Applicant: BOREALIS AG

    Inventor： Jingbo Wang ,  Claudia Kniesel ,  Minna Aarnio-Winterhof ,  Karlheinz Friedrich ,  Friedrich Berger

    IPC: C08L23/12 ,  C08F2/00 ,  C08K3/34 ,  C08L23/16 ,  C08K3/013 ,  C08L23/14

    Abstract: Polypropylene composition comprising (A) 60 to 95 wt % of a heterophasic polypropylene (HECO) comprising 10 to 30 wt % of dispersed phase with the dispersed phase having a comonomer content of 30 to 45 wt % and the HECO having a melt flow rate MFRPP in the range of 12 to 200 g/10 min and being prepared in the presence of a Ziegler Natta catalyst (ZN-C), (B) 0 to 15 wt % of one or more elastomers, (C) 5 to 20 wt % of at least one filler wherein the polypropylene composition fulfils inequation (1) fogging≤0.02 MFRComp+0.3. The composition allows for a well-balanced combination of a good impact/stiffness balance, a good scratch resistance, low VOC and FOG emissions and remarkable good fogging values.

    Long-chain branched propylene polymer composition
    20.
    发明授权
    Long-chain branched propylene polymer composition 有权

    公开(公告)号：US11834529B2

    公开(公告)日：2023-12-05

    申请号：US17623657

    申请日：2020-06-19

    Applicant: BOREALIS AG

    Inventor： Jingbo Wang ,  Markus Gahleitner ,  Klaus Bernreitner ,  Katja Ellen Klimke ,  Friedrich Berger

    IPC: C08F110/06

    CPC classification number: C08F110/06 ,  C08F2810/10

    Abstract: The present invention relates to a propylene polymer composition comprising a long chain branched propylene polymer, wherein said propylene polymer composition has a) a melt flow rate MFR2 (230° C., 2.16 kg) of 0.8 to 6.0 g/10 min b) a xylene hot insolubles (XHU) fraction in an amount of not more than 0.80 wt %, based on the total weight amount of the propylene polymer composition, c) a melting temperature Tm of at least 160.0° C., d) a F30 melt strength of from 5.0 to less than 30.0 cN, and e) a heat distortion temperature (HDT) of at least 108° C., a process for producing said propylene polymer composition by reactive modification of a propylene polymer in the presence of a peroxide, an article comprising said propylene polymer composition and the use of said propylene polymer composition for producing an article.

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