Resin composition for heat-resistant electric wire and heat-resistant electric wire

1. A resin composition for a heat-resistant electric wire, the resin composition comprising:

from 25 to 60 parts by weight of a polyphenylene ether;

from 15 to 42 parts by weight of a polypropylene-based resin;

from 8 to 27 parts by weight of a styrene-based elastomer;

from 5 to 15 parts by weight of a polyamide; and

from 1 to 10 parts by weight of an acid-modified polyolefin,

wherein the polyamide has a melting point of 201° C. or more, and

wherein a sum of the polyphenylene ether, the polypropylene-based resin, the styrene-based elastomer, the polyamide, and the acid-modified polyolefin totals 100 parts by weight.

2. The resin composition for a heat-resistant electric wire according to claim 1 ,

wherein the melting point of the polyamide is 220° C. or less.

3. The resin composition for a heat-resistant electric wire according to claim 1 , further comprising:

a bromine-based flame retardant in an amount of 8 to 20 parts by weight; or

a bromine-based flame retardant and a flame retardant aid in a total amount of 8 to 20 parts by weight.

4. The resin composition for a heat-resistant electric wire according to claim 3 ,

wherein the bromine-based flame retardant is selected from the group consisting of tetrabromobisphenol A, decabromodiphenyl ether, hexabromocyclododecane, bis(tetrabromophthalimide)ethane, TBBA carbonate⋅oligomer, TTBBA-bis(dibromopropyl ether), BBA epoxyoligomer, brominated polystyrene, bis(pentabromophenyl)ethane, poly(dibromopropyl ether) and hexabromobenzene.

5. The resin composition for a heat-resistant electric wire according to claim 3 ,

wherein the flame retardant aid is selected from the group consisting of antimony trioxide, antimony tetroxide, antimony pentoxide, zinc nitrate, zinc stannate and zinc sulfide.

6. The resin composition for a heat-resistant electric wire according to claim 1 ,

wherein the polyphenylene ether is a poly(2,6-dimethyl-1,4-phenylene ether), the polypropylene-based resin is a homopolymer of polypropylene, the styrene-based elastomer is a styrene-ethylene-butylene-styrene copolymer, the polyamide is polyamide 6 or a copolymer of polyamide 6 and polyamide 66, the acid-modified polyolefin is a maleic acid-modified polypropylene, and the total amount of the resins is 100 parts by weight.

7. A heat-resistant electric wire, comprising:

a coating layer formed from the resin composition for a heat-resistant electric wire according to claim 1 .

8. A method for producing a heat-resistant electric wire, comprising:

forming a coating layer from the resin composition for a heat-resistant electric wire according to claim 1 .