Flame-retardant resin composition

Abstract

An object of the present invention is to provide a flame-retardant resin composition that supports a high productivity, that resists bleed out by a flame retardant present in the composition, that resists the migration of its components into ABS resin, that exhibits a high flame retardancy, and that exhibits a high flexibility. More specifically, disclosed is a resin composition comprising, based on the total content of components (A), (B), (C), and (D), the component (A), which a is polyphenylene ether, in a content <A> of 10% by weight or more but less than 45% by weight, a component (B), which is a hydrogenated copolymer principally comprising an aromatic vinyl monomer unit and a conjugated diene monomer unit, in a content of <B> of 20% by weight or more, a component (C), which is a styrene resin and/or olefin resin, in a content <C> of 0% by weight or more, and a component (D), which is a metal phosphinate, in a content (<D>) of 2% by weight or more.

1 . A resin composition, comprising components (A), (B), (C), and (D), wherein, based on a total content of components (A), (B), (C), and (D),
 a content (<A>) of the component (A), which is a polyphenylene ether, is 10% by weight or more but less than 45% by weight,   a content (<B>) of the component (B), which is a hydrogenated copolymer principally comprising an aromatic vinyl monomer unit and a conjugated diene monomer unit, is 20% by weight or more,   a content (<C>) of the component (C), which is a styrene resin and/or olefin resin, is 0% by weight or more, and   a content (<D>) of the component (D), which is a metal phosphinate is 2% by weight or more.   
     
     
         2 . The resin composition according to  claim 1 , wherein the component (C) is the styrene resin and the content <C> is 3% by weight or more. 
     
     
         3 . The resin composition according to  claim 1  or  2 , 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. 
     
     
         4 . The resin composition according to  claim 1  or  2 , wherein a content of the aromatic vinyl monomer unit in the component (B) is 35% by weight or more. 
     
     
         5 . The resin composition according to  claim 1  or  2 , wherein the content <A> of the component (A) and the content <B> of the component (B) satisfy the following formula:
   <B>><A>  (1).   
     
     
         6 . The resin composition according to  claim 1  or  2 , wherein the content <A> of the component (A) and the content <B> of the component (B) satisfy the following formula:
   < B>> 1.5 ×<A>   (2).   
     
     
         7 . The resin composition according to  claim 1  or  2 , wherein a Shore A hardness measured according to JIS K 6253 is 95° or less. 
     
     
         8 . The resin composition according to any one of claims  claim 1  or  2 , further comprising a nitrogen group-containing compound as a component (E), which is a phosphorus-based flame retardant other than metal phosphinate. 
     
     
         9 . The resin composition according to  claim 8 , comprising a melamine polyphosphate as the component (E). 
     
     
         10 . A coating material for electric wire and cable, comprising the resin composition according to  claims 1  or  2 .