Patent ID: 7163983

Claim:
An olefin thermoplastic elastomer sheet composed of an elastomer material comprising an olefin random copolymer formed by copolymerizing ethylene, an α-olefin having 3 to 10 carbon atoms and an unsaturated monomer having a functional group, and optionally a non-conjugated diene, and metal ions crosslinking the olefin random copolymer, wherein the said unsaturated monomer having a functional group is a functional cyclic compound represented by the following general formula (1): wherein R 1 represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, Y 1 , Y 2 and Y 3 denote, independently of one another, a hydrogen atom, a hydrocarbon group having 1 to 10 carbon atoms or —COOH, with the proviso that at least one of Y 1 , Y 2 and Y 3 is —COOH, and when at least two of Y 1 , Y 2 and Y 3 are —COOH, they may be bonded to each other to form an acid anhydride (—CO—(O)—CO—), o is an integer of 0 to 2, and p is an integer of 0 to 5.