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    AT LEAST PARTIALLY BIOBASED LAYERED STRUCTURE WITH GOOD FLAME RESISTANCE
    1.
    发明公开
    AT LEAST PARTIALLY BIOBASED LAYERED STRUCTURE WITH GOOD FLAME RESISTANCE 审中-公开

    公开(公告)号：EP4197783A1

    公开(公告)日：2023-06-21

    申请号：EP21215523.8

    申请日：2021-12-17

    申请人： Covestro Deutschland AG

    发明人： DEIVARAJ, Theivanayagam ,  HERMANNS, Norbert ,  POPHUSEN, Dirk ,  KUENZEL, Roland ,  PUDLEINER, Heinz ,  HOVESTADT, Wieland

    IPC分类号： B32B27/08 ,  B32B27/36 ,  C08J5/18

    摘要： The invention is related to a layered structure (S), comprising at least:
    (A) a first layer (A) comprising a polymer (a), preferably a poly-condensate or a co-poly-condensate, especially preferably a polycarbonate or a copolycarbonate, wherein the polymer comprises a diol component (D);
    (B) a second layer (B) comprising a polymer (b), preferably a poly-condensate or a co-poly-condensate, especially preferably polycarbonate or a copolycarbonate, wherein the polymer comprises a diol component (D1);

    wherein the diol component (D) of the first layer (A) comprises isosorbide in an amount of at least 48 wt.-%, preferably in a range of 48 to 80 wt.-%, based on the total weight of the diol component (D) of the first layer (A) and
    wherein the diol component (D1) of the second layer (B) comprises isosorbide in an amount of ≤ 30 wt.- %, more preferably ≤ 10 wt.-%, especially preferably ≤ 5 wt.-%, based on the total weight of the diol component (D1) of the second layer (B) as well as the production process of such a layered structure (S) and its use.