An object of the present invention is, in a thermoplastic elastomer composition in which a modified rubber is filled and dispersed in a polyamide resin matrix in order to improve the low-temperature durability of the polyamide resin, to reduce the extrusion load during extrusion molding thereof into a film without deteriorating the low-temperature durability. The present invention is a thermoplastic elastomer composition (E) comprising a modified polyamide resin (C) and a modified rubber (D) dispersed in the modified polyamide resin (C), the modified polyamide resin (C) being a resin obtained by melt-blending an polyamide resin (A) and a compound (B) capable of reacting with a terminal amino group of a polyamide resin, wherein the modified rubber (D) has an acid anhydride group or epoxy group and is dynamically cross-linked by a compound (F) having at least one disulfide bond and at least two amino groups. This thermoplastic elastomer composition can be suitable used in the production of an inner linear of a pneumatic tire.
本发明的目的是,在一种热塑性弹性体组合物中,为了提高聚酰胺
树脂的低温耐久性,在聚酰胺
树脂基体中填充和分散了改性橡胶,在将其挤压成型为薄膜的过程中,降低挤压负荷,而不降低低温耐久性。本发明是一种热塑性弹性体组合物 (E),包括改性聚酰胺
树脂 (C) 和分散在改性聚酰胺
树脂 (C) 中的改性橡胶 (D),改性聚酰胺
树脂 (C) 是通过熔融混合聚酰胺
树脂 (A) 和能与聚酰胺
树脂的末端
氨基反应的化合物 (B) 而得到的
树脂、其中,改性橡胶(D)具有酸酐基团或环氧基团,并由具有至少一个二
硫键和至少两个
氨基的化合物(F)动态交联。这种热塑性弹性体组合物适用于生产充气轮胎的内胎线。