Halogen-free propylene-based insulation and conductor coated with same

Patent metadata

Field	Value
Publication number	US-9530537-B2
Application number	US-201214346790-A
Country	US
Kind code	B2
Filing date	Sep 14, 2012
Priority date	Sep 30, 2011
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

The present disclosure is directed to a halogen-free composition and conductors coated with the halogen-free composition. The halogen-free composition includes (A) from 70 wt % to 85 wt % of a polymeric component and (B) from 30 wt % to 15 wt % of a halogen-free flame retardant. The polymeric component (A) includes (i) a propylene homopolymer or a mini-random copolymer with greater than 40% crystallinity and (ii) an ethylene/a-olefin copolymer. The halogen-free composition has a density less than 1.15 g/cc. The halogen-free composition also has a scrape abrasion resistance of greater than or equal to 350 cycles as measured in accordance with ISO 6722.

First claim

What is claimed is:

1. A halogen-free composition comprising:
A. a polymeric component comprising
(i) a propylene homopolymer or a mini-random copolymer with greater than 40% crystallinity;
(ii) an ethylene/octene copolymer;

B. a halogen-free flame retardant;
the composition comprising
from 50 wt % to 70 wt % of the propylene homopolymer;
from 10 wt % to 20 wt % ethylene/octene copolymer; and
from 15 wt % to 35 wt % halogen-free flame retardant,
the composition having a density less than 1.15 g/cc; and
a scrape abrasion resistance of greater than or equal to 350 cycles as measured in accordance with ISO 6722.

2. The composition of claim 1 wherein the propylene homopolymer or mini-random copolymer has a crystallinity greater than or equal to 55% to 75%.

3. The composition of claim 1 wherein the polymeric component comprises
(i) from 70 wt % to 90 wt % of the propylene homopolymer; and
(ii) from 30 wt % to 15 wt % of the ethylene/octene copolymer.

4. The composition of claim 1 wherein the halogen-free flame retardant is selected from the group consisting of ammonium polyphosphate, melamine phosphate, piperazine, and combinations thereof.

5. A halogen-free composition comprising:
A. from 70 wt % to 85 wt % of a polymeric component comprising
(i) a propylene homopolymer or a mini-random copolymer with greater than 40% crystallinity;
(ii) an ethylene/α-olefin copolymer;

B. from 30 wt % to 15 wt % a halogen-free flame retardant;
the composition having a density less than 1.15 g/cc; and
a scrape abrasion resistance of greater than or equal to 350 cycles as measured in accordance with ISO 6722, wherein the composition is free of a metal hydroxide.

6. A halogen-free composition comprising:
A. from 70 wt % to 85 wt % of a polymeric component comprising
(i) a propylene homopolymer or a mini-random copolymer with greater than 40% crystallinity;
(ii) an ethylene/α-olefin copolymer;

B. from 30 wt % to 15 wt % a halogen-free flame retardant;
the composition having a density less than 1.15 g/cc; and

a scrape abrasion resistance of greater than or equal to 350 cycles as measured in accordance with ISO 6722, wherein the composition has a sandpaper abrasion resistance greater than or equal to 200 mm.

7. A coated conductor comprising:
a conductor;
a coating on the conductor, the coating formed from the composition of claim 1 .

8. The coated conductor of claim 7 wherein the coating has a thickness from 0.1 mm to 2.0 mm.

9. The composition of claim 1 wherein the composition has a time to extinguish of less than 70 seconds as measured in accordance with SAE 11678.

10. The composition of claim 5 wherein the propylene homopolymer or mini-random copolymer has a crystallinity greater than or equal to 55% to 75%.

11. The composition of claim 5 wherein the polymeric component comprises
(i) from 70 wt % to 90 wt % of the propylene homopolymer; and
(ii) from 30 wt % to 15 wt % of the ethylene/α-olefin copolymer.

12. The composition of claim 5 wherein the halogen-free flame retardant is selected from the group consisting of ammonium polyphosphate, melamine phosphate, piperazine, and combinations thereof.

13. The composition of claim 5 wherein the composition has a time to extinguish of less than 70 seconds as measured in accordance with SAE J1678.

14. A coated conductor comprising:
a conductor;
a coating on the conductor, the coating formed from the composition of claim 5 .

15. The composition of claim 6 wherein the propylene homopolymer or mini-random copolymer has a crystallinity greater than or equal to 55% to 75%.

16. The composition of claim 6 wherein the polymeric component comprises
(i) from 70 wt % to 90 wt % of the propylene homopolymer; and
(ii) from 30 wt % to 15 wt % of the ethylene/α-olefin copolymer.

17. The composition of claim 6 wherein the halogen-free flame retardant is selected from the group consisting of ammonium polyphosphate, melamine phosphate, piperazine, and combinations thereof.

18. The composition of claim 6 wherein the composition has a time to extinguish of less than 70 seconds as measured in accordance with SAE J1678.

19. A coated conductor comprising:
a conductor;
a coating on the conductor, the coating formed from the composition of claim 6 .

Assignees

• Laufer Caroline H
• Fu Lin
• Lin Thomas S
• Bishop Matthew T
• Lakrout Hamed
• Dow Global Technologies Llc

Inventors

• Laufer Caroline H
• Fu Lin
• Lin Thomas S
• Bishop Matthew T
• Lakrout Hamed

Classifications

• H01B7/295

  using material resistant to flame · CPC title

• C08L23/12 Primary

  Polypropene · CPC title

• C08L23/142

  at least partially crystalline copolymers of propene with other olefins · CPC title

• C08K3/28

  Nitrogen-containing compounds · CPC title

• C08K5/5399

  Phosphorus bound to nitrogen · CPC title