AERATED POLYPROPYELENE COMPOSITIONS EXHIBITING SPECIFIC EMISSION

    公开(公告)号:US20210403677A1

    公开(公告)日:2021-12-30

    申请号:US17289655

    申请日:2019-10-22

    Applicant: BOREALIS AG

    Abstract: A polypropylene composition comprising oligomers having a semi-volatile organic condensable (FOG,VDA 278 October 2011), content of 50 μg/g to about 400 μg/g of the total polypropylene composition, and volatile organic compounds (VOC,VDA 278 October 2011) in an amount of less than 80 μg/g of the total polypropylene composition, wherein the weight ratio of said oligomers versus said volatiles is more than about 5.0, wherein the polypropylene composition has an MFR2 (ISO 1133, 230° C., 2.16 kg) of 10 g/10 min or higher, wherein the polypropylene composition a flexural modulus (ISO 178 on injection moulded specimens of 80×10×4 mm prepared in accordance with ISO 294-1:1996) of from 1000 to 2000 MPa, and wherein the total quantity of slip agent is at least 500 ppm.

    LOW EMISSION POLYPROPYLENE FOAM SHEETS
    8.
    发明申请

    公开(公告)号:US20200087478A1

    公开(公告)日:2020-03-19

    申请号:US16467202

    申请日:2017-12-28

    Applicant: Borealis AG

    Abstract: The invention relates to a process for the production of a foam having low organic compounds emissions, to polypropylene foamed products obtainable by the process, and to a process for the manufacture of low organic compounds emission articles comprising a foam for use in cars and food packaging. The process comprises the steps of: a) providing a foam comprising a propylene composition comprising a high melt strength propylene (HMS-PP) homopolymer or copolymer or combinations thereof, said HMS-PP foam having a melt strength of at least 25 cN at a maximum speed of at least 200 mm/s and a melting temperature of at least 135° C. and b) subjecting the HMS-PP foam to a thermal treatment at a temperature Tt which is preferably between 5 and 15° C. below the melting temperature Tm of the HMS-PP for a duration between preferably 1 and 10 minutes.

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