Thermoplastic resin composition

A thermoplastic resin composition comprising a modified polyamide resin (A′) and a modified rubber (B) having an acid anhydride group or an epoxy group, wherein the modified polyamide resin (A′) is a polyamide resin modified with 0.05 to 5 parts by weight, based on 100 parts by weight of the polyamide resin, of a compound (D) that bonds to a terminal amino group of the polyamide resin;

• and the modified rubber (B) having an acid anhydride group or an epoxy group is modified with a hydrogen bonding compound (C) having a functional group reacting with the acid anhydride group or epoxy group of modified rubber (B) and a functional group capable of hydrogen bonding with an amide bond or a hydroxyl group, wherein the hydrogen bonding compound (C) has a hydroxyl group as the functional group reacting with an acid anhydride group or an epoxy group and has a hydroxyl group or a nitrogen-containing heterocycle as the functional group capable of hydrogen bonding with an amide bond or a hydroxyl group and wherein the hydrogen bonding compound (C) is tris (2-hydroxyethyl) isocyanurate and (C) is present in the composition of the final product but has already reacted with (B);
• wherein the modified rubber (B) having an acid anhydride group or an epoxy group is not modified with a compound having two or more amino groups, and wherein the modified rubber (B) is dispersed in a matrix of the modified polyamide resin (A′) and an interface between the matrix of the modified polyamide resin (A′) and a dispersion phase of the modified rubber(B) is reinforced by a hydrogen bond;
• and wherein the thermoplastic resin composition has a sea-island structure, wherein the modified rubber (B) is an island phase within the thermoplastic resin composition.