Flame-retardant resin composition

A resin composition, comprising components (A), (B), (C), and (D), wherein, based on a total content of components (A), (B), (C), and (D),na content ( ) of the component (A), which is a polyphenylene ether, is 20% by weight or more but less than 21% by weight,a content ( ) of the component (B), which is a hydrogenated copolymer principally comprising an aromatic vinyl monomer unit and a conjugated diene monomer unit, is 57% by weight or more but 59% by weight or less,a content ( ) of the component (C), which is a styrene resin and/or olefin resin, is 0% by weight or more but 40% by weight or less, anda content ( ) of the component (D), which is an aluminum phosphinate is 2% by weight or more but 15% by weight or less, andwherein the component (B) comprises (B1) a polymer block principally comprising an aromatic vinyl monomer unit, and (B2) a hydrogenated copolymer block principally comprising an aromatic vinyl monomer unit and a conjugated diene monomer unit; and a content of the aromatic vinyl monomer unit in the (B2) is 20% by weight or more and 95% by weight or less, andwherein the content of the aromatic vinyl monomer unit in the component (B) is 35% by weight or more and 80% by weight or less,andthe ratio of the content ( ) of the component (B) to the content ( ) of the component (A) is from 2.71 to 2.95.

A pellet of flame retardant resin composition obtained by melt-mixing a resin composition, comprising components (A), (B), (C) and (D), wherein, based on a total content of components (A), (B), (C) and (D),na content ( ) of the component (A), which is a polyphenylene ether, is 20% by weight or more but less than 21% by weight,a content ( ) of the component (B), which is a hydrogenated copolymer principally comprising an aromatic vinyl monomer unit and a conjugated diene monomer unit, is 57% by weight or more but 59% by weight or less,a content ( ) of the component (C), which is a styrene resin and/or olefin resin, is 0% by weight or more but 40% by weight or less, anda content ( ) of the component (D), which is an aluminum phosphinate is 2% by weight or more but 15% by weight or less;wherein the component (B) comprises (B1) a polymer block principally comprising an aromatic vinyl monomer unit, and (B2) a hydrogenated copolymer block principally comprising an aromatic vinyl monomer unit and a conjugated diene monomer unit; and a content of the aromatic vinyl monomer unit in the (B2) is 20% by weight or more and 95% by weight or less,wherein the content of the aromatic vinyl monomer unit in the component (B) is 35% by weight or more and 80% by weight or less,the ratio of the content ( ) of the component (B) to the content ( ) of the component (A) is from 2.71 to 2.95; andwherein a strength at a 100% pull sample according to the tensile measurement (JIS K 6251, pull rate=500 cm/minute) carried out on a sample (thickness=2 mm) of the pellet of flame retardant resin composition is 200 kg/cm2 or less.

An electric wire coated by a resin composition, comprising components (A), (B), (C) and (D), wherein, based on a total content of components (A), (B), (C) and (D),na content ( ) of the component (A), which is a polyphenylene ether, 20% by weight or more but less than 21% by weight,a content ( ) of the component (B), which is a hydrogenated copolymer principally comprising an aromatic vinyl monomer unit and a conjugated diene monomer unit, is 57% by weight or more but 59% by weight or less,a content ( ) of the component (C), which is a styrene resin and/or olefin resin, is 0% by weight or more but 40% by weight or less, anda content ( ) of the component (D), which is an aluminum phosphinate is 2% by weight or more but 15% by weight or less,wherein the component (B) comprises (B1) a polymer block principally comprising an aromatic vinyl monomer unit, and (B2) a hydrogenated copolymer block principally comprising an aromatic vinyl monomer unit and a conjugated diene monomer unit; and a content of the aromatic vinyl monomer unit in the (B2) is 20% by weight or more and 95% by weight or less,wherein the content of the aromatic vinyl monomer unit in the component (B) is 35% by weight or more and 80% by weight or less,andthe ratio of the content ( ) of the component (B) to the content ( ) of the component (A) is from 2.71 to 2.95; andwherein the electric wire coated by the resin composition passes the VW-1 combustion test according to UL1581 and the flame is extinguished within 60 seconds.