Thermally conductive compositions and cables thereof

1. A cable consisting of:

a conductor; and

an insulation layer,

wherein the insulation layer is formed of a thermally conductive composition comprising:

a base polyolefin;

a halogenated flame retardant;

from about 90 phr to about 200 phr of a non-halogenated flame retardant, the non-halogenated flame retardant comprising magnesium hydroxide; and

a flame retardant synergist; and

wherein the thermally conductive composition has a thermal conductivity of 0.30 W/mK or more and the cable passes the UL 1581 VW-1 test.

2. The cable of claim 1 , wherein the thermally conductive composition comprises about 10 phr to about 70 phr of the halogenated flame retardant, and the halogenated flame retardant comprises a brominated flame retardant.

3. The cable of claim 1 , wherein the thermally conductive composition comprises about 5 phr to about 35 phr of the flame retardant synergist, and the flame retardant synergist comprises antimony oxide.

4. The cable of claim 1 , wherein the magnesium hydroxide is surface treated with vinyl silane.

5. The cable of claim 1 , wherein the magnesium hydroxide has a mean particle size of about 0.1 micron to about 10 microns.

6. The cable of claim 1 , wherein the thermally conductive composition further comprises one or more of a crosslinking agent, a filler, an antioxidant, a stabilizer, a colorant, a processing aid, a smoke suppressant, and a second non-halogenated flame retardant.

7. The cable of claim 6 , wherein the thermally conductive compositions comprises about 10 phr, or less, of the processing aid.

8. The cable of claim 6 , wherein the thermally conductive composition comprises about 5 phr to about 50 phr of at least one of the filler or the smoke suppressant.

9. The cable of claim 6 , wherein the thermally conductive composition comprises a second non-halogenated flame retardant, wherein the second non-halogenated flame retardant comprises a phosphorus based flame retarder.

10. The cable of claim 1 , wherein the thermally conductive composition passes the UL-44 Long Term Insulation Resistance (LTIR) test at 90° C.

11. The cable of claim 1 , wherein the thermally conductive composition has an emissivity greater than about 0.5.

12. The cable of claim 1 , wherein the base polyolefin comprises ethylene-butene copolymer, ethylene propylene diene monomer rubber, ethylene-vinyl acetate copolymer, or a blends or combinations thereof.

13. The cable of claim 1 , wherein the base polyolefin further comprises a maleic anhydride modified polyolefin.

14. The cable of claim 13 , wherein about 1% to about 15% of the base polyolefin comprises the maleic anhydride modified polyolefin.

15. The cable of claim 1 , wherein the conductor is formed from one or more of copper, aluminum, a copper alloy, and an aluminum alloy.

16. The cable of claim 1 , wherein the thermally conductive composition exhibits an elongation at break of about 100% or more.