THERMOPLASTIC ELASTOMER COMPOSITION

摘要

A thermoplastic elastomer composition having a flexural modulus as defined in JIS K7203 of from 500 to 15,000 kg/cm2, which is obtainable by melt kneading (A) from 20 to 60 parts by weight of a polyamide resin with (B) from 40 to 80 parts by weight of en ethylene copolymer comprising (a) from 40 to 90% by weight of an ethylene unit, (b) from 5 to 60% by weight of an .alpha.,.beta.unsaturated carboxylic acid alkyl ester unit, and (c) from 0.3 to 10% by weight of a maleic anhydride unit, to obtain a composition (I), and further melt kneading 100 parts by weight of the composition (I) with (C) from 0.01 to 10 parts by weight of magnesium hydroxide is disclosed. A thermoplastic elastomer composition having a flexural modulus as defined in JIS K7203 of from 500 to 15,000 kg/cm2, which is obtainable by melt kneading (A) from 20 to 60 parts by weight of a polyamide resin with (B) from 40 to 80 parts by weight of an ethylene copolymer comprising (a) from 40 to 90% by weight of an ethylene unit, (b) from 5 to 60% by weight of an .alpha.,.beta.unsaturated carboxylic acid alkyl ester unit, and (c) from 0.3 to 10% by weight of a maleic anhydride unit, to obtain a composition (I), and further melt kneading 100 parts by weight of the composition (I) with (C) from 0.01 to 10 parts by weight of magnesium hydroxide and (D) from 0.01 to 20 parts by weight of at least one amino group-containing compound containing two or more amino groups per molecule, which is selected from the group consisting of aliphatic diamines, aliphatic diamine carbamates, aliphatic polyamines, alicyclic polyamines, aliphatic polyamines having an aromatic ring, aromatic amines, and tertiary amine compounds is also disclosed. The thermoplastic elastomer composition of this invention is flexible and tough over a wide temperature range and has an excellent balance of properties such as mechanical properties and thermal properties as well as a superior appearance.