Abstract: A thermoplastic resin composition is disclosed, which is obtained by melt-kneading (A) from 60 to 97 parts by weight of a polyamide resin and (B) from 3 to 40 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 alkyl .alpha., .beta.-unsaturated carboxylate unit, and (c) from 0.3 to 10% by weight of a maleic anhydride unit and then melt-kneading the resulting composition with (C) from 0.01 to 20 parts by weight of a polyfunctional compound having at least two functional groups having reactivity to a carboxyl group, a carboxylic acid anhydride group or an amino group per molecule to effect partial crosslinking reaction. The composition provides molded articles having a good balance of physical properties and satisfactory appearance.

Abstract: A thermoplastic resin composition having a flexural modulas as defined in ASTM D790 of from 500 to 15,000 kg/cm.sup.2, which is obtainable by partial crosslinking upon melt kneading a mixture comprising:(A) from 20 to 60 parts by weight of a polyamide resin; and(B) from 80 to 40 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 or a partially ionized maleic anhydride unit; with(C) from 0.01 to 20 parts by weight, based on 100 parts by weight of the sum of the components (A) and (B), of a polyfunctional compound containing at least two functional groups which are reactive to a carboxyl group, a carboxylic anhydride group, or an amino group, in the molecule thereof, is disclosed.

Abstract: An impact-resistant polyamide resin is produced bypreparing Mixture (I) by melt-kneading (A) a polyamide resin with (B) at least one modified olefin polymer selected from the group consisting of olefin rubbers having an unsaturated dicarboxylic acid anhydride added thereto, .alpha.-olefin polymers having an unsaturated dicarboxylic acid anhydride added thereto, crystalline ethylene-.alpha.-olefin copolymers having an unsaturated dicarboxylic acid anhydride added thereto, and ethylene-ethylenic unsaturated ester copolymers having an unsaturated dicarboxylic acid anhydride added thereto,preparing Mixture (II) by melt-kneading Mixture (I) with (C) a polyfunctional compound having in the molecule two or more functional groups reactive with carboxyl group, carboxylic acid anhydride group or amino group, andmelt-kneading Mixture (II) with (D) a polyamide resin.

Abstract: A flexible thermoplastic resin composition is disclosed comprising (A) from 5 to 59 parts by weight of a polyamide resin and (B) from 95 to 41 parts by weight of an ethylene copolymer containing (a) from 50 to 90% by weight of ethylene, (b) from 5 to 49% by weight of an .alpha.,.beta.-unsaturated carboxylic acid alkyl ester, and (c) from 0.5 to 10% by weight of maleic anhydride. The resin composition of the invention has excellent cold resistance, particularly impact strength at low temperatures, and an excellent balance between rubbery elasticity and rigidity in addition to excellent thermal resistance, abrasion resistance, and chemical resistance.

Abstract: A thermoplastic resin composition containing polyphenylene oxide resin is provided, which is superior in processability and impact resistance as well as heat resistance, chemical resistance and hardness, said thermoplastic resin composition comprising(A) polyphenylene oxide resin or a resin composition containing the same, and(B) ethylene copolymer comprising 50-90% by weight of ethylene, 5-49% by weight of alkyl ester of .alpha.,.beta.-unsaturated carboxylic acid and 0.5-10% by weight of maleic anhydride.