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    PELLETIZATION OF A POLYMER STABILIZER MIXTURE
    1.
    发明申请
    PELLETIZATION OF A POLYMER STABILIZER MIXTURE 审中-公开

    公开(公告)号：WO2022179950A1

    公开(公告)日：2022-09-01

    申请号：PCT/EP2022/054090

    申请日：2022-02-18

    Applicant: BASF SE

    Inventor： GFROERER, Thomas Georg ,  HERBST, Heinz ,  REICH, Oliver ,  TUERKOGLU, Gazi

    IPC: B29B9/08 ,  B29B9/12 ,  C08J3/22 ,  C08K3/22 ,  C08K5/01 ,  C08K5/098 ,  C08K5/134 ,  C08K5/526

    Abstract: The invention relates to a method for manufacturing a pellet in a pellet mill, which method comprises the steps of (A) pressing a mixture for compaction by a roller through a nozzle to obtain a strand, and (B) comminuting the strand to obtain the pellet, wherein the mixture for compaction comprises (i) 87 to 97 wt.% of a polymer stabilizer mixture polymer stabilizer mixture, which comprises the polymer stabilizers (i-1) 21 to 29 wt.% of tris(2,4-ditert-butylphenyl) phosphite (CAS-No. 31570-04-4), (i-2) 21 to 29 wt.% of tetrakis-[3-(3,5-ditert-butyl-4-hydroxy-phenyl)-propionyloxymethyl]methane (CAS-No. 6683-19-8), (i-3) 8 to 12 wt.% of a C16-C18 fatty acid calcium salt, (i-4) 36 to 44 wt.% of a calcium oxide, and wt.% of the polymer stabilizers (i-1), (i-2), (i-3) and (i-4) are based on the weight of the polymer stabilizer mixture, and (ii) 3 to 13 wt.% of a processing aid, which is a propylene-ethylene copolymer and which possesses a melting enthalpy below 100 J / g at 101.32 kPa. The pellet is useful for a dust-free handling of its polymer stabilizer mixture at a manufacturing of a stabilized polymer. Furthermore, a method for stabilizing a polymer, which is a polyolefin, a polystyrene or a mixture thereof, is disclosed, which comprises the dosing of the pellet to the polymer.

    PELLETIZATION OF A POLYMER STABILIZER MIXTURE
    2.
    发明申请
    PELLETIZATION OF A POLYMER STABILIZER MIXTURE 审中-公开

    公开(公告)号：WO2022179949A1

    公开(公告)日：2022-09-01

    申请号：PCT/EP2022/054088

    申请日：2022-02-18

    Applicant: BASF SE

    Inventor： GFROERER, Thomas Georg ,  REICH, Oliver ,  HERBST, Heinz ,  TUERKOGLU, Gazi

    IPC: B29B9/08 ,  B29B9/12 ,  C08J3/22 ,  C08K5/098 ,  C08K5/134 ,  C08K5/523 ,  C08K5/01 ,  C08K9/08 ,  C08K5/526

    Abstract: The invention relates to a method for manufacturing a pellet in a pellet mill, which method comprises the steps of (A) pressing a mixture for compaction by a roller through a nozzle to obtain a strand, and (B) comminuting the strand to obtain the pellet, wherein the mixture for compaction comprises (i) 87 to 97 wt.% of a polymer stabilizer mixture polymer stabilizer mixture, which comprises the polymer stabilizers (i-1) 35 to 45 wt.% of tris(2,4-ditert-butylphenyl) phosphite (CAS-No. 31570-04-4), (i-2) 15 to 25 wt.% of tetrakis-[3-(3,5-ditert-butyl-4-hydroxy-phenyl)-propionyloxymethyl]methane (CAS-No. 6683-19-8), (i-3) 35 to 45 wt.% of a C16-C18 fatty acid calcium salt, and wt.% of the polymer stabilizers (i-1), (i-2) and (i-3) are based on the weight of the polymer stabilizer mixture, and (ii) 3 to 13 wt.% of a processing aid, which is a propylene-ethylene copolymer and which possesses a melting enthalpy below 100 J / g at 101.32 kPa. The pellet is useful for a dust-free handling of its polymer stabilizer mixture at a manufacturing of a stabilized polymer. Furthermore, a method for stabilizing a polymer, which is a polyolefin, a polystyrene or a mixture thereof, is disclosed, which comprises the dosing of the pellet to the polymer.

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