Process for gas-phase polymerization of olefins

    公开(公告)号:US11098143B2

    公开(公告)日:2021-08-24

    申请号:US16649044

    申请日:2018-09-13

    Abstract: A process for the polymerization of olefins in gas phase carried out in a reactor having two interconnected polymerization zones, a first zone (riser) and a second zone (downcomer), wherein growing polymer particles: a) flow through the riser under fast fluidization conditions established by feeding a mixture of gas and liquid; b) leave the riser and enter the downcomer, through which the growing polymer particles flow downward in a densified form; and c) leave the downcomer and are reintroduced into the riser, thereby establishing a circulation of polymer between the riser and the downcomer; the reactor is operated at a temperature between 0° C. and 5° C. above the dew point of the riser gas at the operating pressure, and in the riser, besides the growing polymer particles and gas flow, an amount of liquid is present.

    LLDPE-containing impact modifier polyolefin composition

    公开(公告)号:US10385199B2

    公开(公告)日:2019-08-20

    申请号:US15738782

    申请日:2016-06-22

    Abstract: Polyolefin compositions made from or containing:(A) about 5 to about 35% by weight of a propylene-based polymer containing about 90% by weight or more of propylene units and containing about 10% by weight or less of a fraction soluble in xylene at 25° C. (XSA);(B) about 25 to about 50% by weight, of a copolymer of ethylene and a C3-C8 alpha-olefin containing from about 0.1% to about 15% by weight of alpha-olefin units and containing about 75% by weight or less of a fraction soluble in xylene at 25° C. (XSB); and(C) about 30 to about 60% by weight, of a copolymer of ethylene and propylene containing from about 45% to about 75% by weight of ethylene units and containing from about 55% to about 95% by weight, of a fraction soluble in xylene at 25° C. (XSC).

    POLYOLEFIN MASTERBATCH AND COMPOSITION SUITABLE FOR INJECTION MOLDING
    5.
    发明申请
    POLYOLEFIN MASTERBATCH AND COMPOSITION SUITABLE FOR INJECTION MOLDING 审中-公开
    聚氨酯主要成分和适用于注射成型的组合物

    公开(公告)号:US20160272802A1

    公开(公告)日:2016-09-22

    申请号:US15079313

    申请日:2016-03-24

    Abstract: A masterbatch composition comprising: 70-90% wt of a component (A) being a propylene homopolymer or copolymer of propylene with ethylene or C4-C10 alpha olefins, having a MFRA according to ISO 1133 (230° C./2.16 Kg) ranging from 15 to 70 g/10 min; and 10-30% wt of a component B) being a propylene-ethylene copolymer comprising 25-45% wt of ethylene derived units and having a value of the intrinsic viscosity [η] of the fraction soluble in xylene at room temperature ranging from 5 to 9 dl/g, said masterbatch composition having a total MFR higher than 4 g/10 min, and a value of the flexural modulus measured according to ISO method 178 ranging from 950 to 2000 MPa.

    Abstract translation: 一种母料组合物,其包含:70-90重量%的组分(A)为丙烯均聚物或丙烯与乙烯或C 4 -C 10α-烯烃的共聚物,其具有根据ISO 1133(230℃/ 2.16Kg)的MFRA范围 15〜70g / 10min; 和10-30重量%的组分B)作为丙烯 - 乙烯共聚物,其包含25-45重量%的乙烯衍生单元,并且在室温下可溶于二甲苯的馏分的特性粘度[η]值为5 至9dl / g,所述母料组合物的总MFR高于4g / 10min,根据ISO方法178测量的弯曲模量值为950至2000MPa。

    POLYPROPYLENE COMPOSITION
    8.
    发明公开

    公开(公告)号:US20230383107A1

    公开(公告)日:2023-11-30

    申请号:US18032531

    申请日:2021-10-06

    CPC classification number: C08L23/12 C08L2205/025

    Abstract: A polypropylene composition made from or containing:



    A) from 76 wt % to 95 wt % of a propylene homopolymer having:

    fraction soluble in xylene at 25° C. between 2.0 wt % and 4.5 wt %; and
    melt flow rate ranging from 60.0 to 110.0 g/10 min; and


    B) from 5 wt % to 24 wt % of a copolymer of propylene and ethylene containing from 75 wt % to 90.0 wt % of ethylene derived units;
    wherein the polypropylene composition has
    content of ethylene derived units in the fraction soluble in xylene at 25° C. lower than the content of ethylene derived units of component B) and ranging from 51.0 wt % to 74.0 wt %; and
    at least two melting points, wherein the higher melting points ranges from 156.0° C. to 166.0° C. and the lower melting point ranges from 90.0° C. to 125.0° C.;
    wherein the sum of the amounts of component A) and B) being 100 wt %.

    Propylene based polymer composition

    公开(公告)号:US11124636B2

    公开(公告)日:2021-09-21

    申请号:US16610332

    申请日:2018-04-12

    Abstract: A propylene polymer composition made from or containing: a) from 35 wt % to 65 wt %, based upon the total weight of the propylene polymer composition, of a propylene 1-hexene copolymer containing from 10.2 to 13.0% by weight, based upon the weight of the propylene 1-hexene copolymer, of 1-hexene derived units and having a Melt Flow Rate (MFR, measured according to ASTM D 1238, 230° C./2.16 kg, (at 230° C., with a load of 2.16 kg)) from 3.5 to 12.0 g/10 min; b) from 35 wt % to 65 wt %, based upon the total weight of the propylene polymer composition, of a propylene ethylene copolymer containing from 1.5 wt % to 6.5 wt %, based upon the weight of the propylene ethylene copolymer, of ethylene derived units and having a Melt Flow Rate (MFR, measured according to ASTM D 1238, 230° C./2.16 kg, (at 230° C., with a load of 2.16 kg)) from 3.5 to 12.0 g/10 min.

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