CPC C08L 23/0815 (2013.01) [C08L 9/00 (2013.01); C08L 2207/04 (2013.01)] | 5 Claims |
1. A thermoplastic elastomer composition obtained by melt-kneading (A) an ethylene/α-olefin/non-conjugated polyene copolymer rubber that is a copolymer of ethylene, an α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, (B) a polyolefin resin and (C) a mineral oil-based softening agent in a presence of (D) a crosslinking agent,
at least part of the ethylene/α-olefin/non-conjugated polyene copolymer rubber (A) being crosslinked,
the thermoplastic elastomer composition having a sea-island structure in which the ethylene/α-olefin/non-conjugated polyene copolymer rubber (A) is dispersed as a dispersed phase (island phase) in a continuous phase (sea phase) of the polyolefin resin (B), and
when a cross-section of the thermoplastic elastomer composition is observed with an atomic force microscope (AFM), a ratio of (b) a local elastic modulus of the continuous phase to (a) a local elastic modulus of the dispersed phase being from 10 to 30.
|