CROSSLINKABLE ACRYLIC RUBBER COMPOSITION
    2.
    发明公开

    公开(公告)号:EP4389822A1

    公开(公告)日:2024-06-26

    申请号:EP22858156.7

    申请日:2022-06-17

    发明人: SAITO, Satoru

    摘要: A crosslinkable acrylic rubber composition comprising:
    (A) acrylic rubber containing a carbamic acid ester group and a carboxyl group;
    (B) a phenothiazine-based antioxidant represented by the following general formula [I]:

    [wherein R3 is a hydrogen atom, a monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, or an acyl group represented by the following general formula:

    (wherein R4 is a monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms), and R5 is an aralkyl group having 7 to 20 carbon atoms]; and
    (C) a crosslinking accelerator. The crosslinkable acrylic rubber composition that can suppress significant softening degradation of an acrylic rubber crosslinked product observed in the early stage of thermal oxidative degradation and hardening degradation observed in the later stage thereof, and that can minimize the decrease in its mechanical strength.