Halogen-free flame retardant polyolefin
View Patent ↗A halogen-free compositions containing an additive of bohmite, nanoclay, microcrystalline talc, zinc hydroxystannate, and a polyolefin oil. The composition is useful as a covering material (e.g. insulation or jacket) for electrical cables.
1. A cable having a conductor and a covering, said covering comprising a base polymer and an additive, wherein the additive contains bohmite, nanoclay, microcrystalline talc, zinc hydroxystannate, and a polyolefin oil.
2. An additive for improving mechanical and flame resistant properties of polyolefins comprising bohmite, nanoclay, microcrystalline talc, zinc hydroxystannate, and a polyolefin oil.
3. The additive of claim 2 , wherein the polyolefin oil has a viscosity of about 60-90 cP at 20° C.
4. The additive of claim 2 , wherein the polyolefin oil has a molecular weight of about 570-310 g/mol.
5. The additive of claim 2 , wherein the polyolefin oil has a density of about 0.826-0.830 g/cm 3 .
6. The additive of claim 2 , wherein the nanoclay is montmorillonite clay.
7. The additive of claim 2 , containing about 5-20 parts (by weight) bohmite, about 5-20 parts nanoclay, about 5-20 parts microcrystalline talc, about 5-20 parts zinc hydroxystannate, and about 2-4 parts polyolefin oil.
8. A composition comprising a base polymer and an additive, wherein the additive contains bohmite, nanoclay, microcrystalline talc, zinc hydroxystannate, and a polyolefin oil.
9. The composition of claim 8 , wherein the polyolefin oil has a viscosity of 60-90 cP at 20° C.
10. The composition of claim 8 , wherein the polyolefin oil has a molecular weight of about 570-310 g/mol.
11. The composition of claim 8 , wherein the polyolefin oil has a density of about 0.826-0.830 g/cm 3 .
12. The composition of claim 8 , wherein the nanoclay is montmorillonite clay.
13. The composition of claim 8 , containing about 5-20 phr (by weight) bohmite.
14. The composition of claim 8 , containing about 5-20 phr nanoclay.
15. The composition of claim 8 , containing about 5-20 phr microcrystalline talc.
16. The composition of claim 8 , containing about 5-20 phr zinc hydroxystannate.
17. The composition of claim 8 , containing about 2-4 phr polyolefin oil.
18. The composition of claim 8 , wherein the base polymer is an olefin.
19. The cable of claim 18 , wherein the polyolefin oil has a viscosity of 60-90 cP at 20° C.
20. The cable of claim 18 , wherein the polyolefin oil has a molecular weight of about 570-310 g/mol.