Halogen-free, flame retardant composition for wire and cable applications

Patent metadata

Field	Value
Publication number	US-9336927-B2
Application number	US-201013990084-A
Country	US
Kind code	B2
Filing date	Dec 17, 2010
Priority date	Dec 17, 2010
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

A halogen-free, flame retardant composition comprises: A. A polymer blend comprising: 1. Polypropylene, and 2. Thermoplastic elastomer (TPE) other than the polypropylene of (A)(1), and B. An intumescent flame retardant comprising at least one of: 1. A compound of Formula 1 where M is at least one of melamine, morpholine, piperazine, piperidine, alkyl hydroxyl and a triazine polymer of Formula 2 where D is a heterocyclic or polyamine moiety, and m and n are independently integers the sum (m+n) of which is less than 1000, and 2. A piperazine phosphate.

First claim

The invention claimed is:

1. A composition comprising:
(A) a polymer blend comprising:
(1) from 5 to 80 weight percent polypropylene, based on the weight of the composition, and
(2) from 5 to 80 weight percent thermoplastic elastomer (TPE) other than the polypropylene of (A)(1), and

(B) an intumescent flame retardant comprising:
(i) an intumescent hybrid polyphosphate of formula (1)

where M is at least one of morpholine, piperazine, piperidine, alkyl hydroxyl or a triazine polymer of formula (2)

where D is a heterocyclic or polyamine moiety, and m and n are independently integers, the sum (m+n) of which is less than (<) 1000, and
(ii) a piperazine phosphate.

2. The composition of claim 1 comprising from 5 to 60 weight percent polypropylene and from 10 to 80 weight percent TPE.

3. The composition of claim 1 comprising from 1 to 70 weight percent of the intumescent flame retardant.

4. The composition of claim 1 in which the polypropylene of (A)(1) is impact-modified polypropylene, and the TPE is at least one of a styrenic block copolymer, an ethylene-based elastomer or plastomer, an ethylene block copolymer and a propylene-based plastomer or elastomer.

5. The composition of claim 1 in which the intumescent flame retardant further comprises one or more of halogen-free organic phosphonic acids, phosphonates, phosphinates, phosphonites, phosphinites, phosphine oxides, phosphines, phosphites, phosphates, phosphonitrilics, phosphorus ester amides, phosphoric acid amides, phosphonic acid amides, phosphinic acid amides, melamine and melamine derivatives, pentaerythritol, triglyceride isocyanurate, novolac and a metal oxide or salt.

6. The composition of claim 5 in which the metal oxide is zinc oxide.

7. A wire or cable sheath made from the composition of claim 1 .

8. A wire or cable comprising the sheath of claim 7 .

9. The composition of claim 1 comprising from 5 to 60 weight percent polypropylene and from 10 to 80 weight percent TPE.

10. The composition of claim 1 in which the polypropylene of (A)(1) is impact-modified polypropylene, and the TPE is at least one of a styrenic block copolymer, an ethylene-based elastomer or plastomer, an ethylene block copolymer and a propylene-based plastomer or elastomer.

11. The composition of claim 1 in which the intumescent flame retardant further comprises one or more of halogen-free organic phosphonic acids, phosphonates, phosphinates, phosphonites, phosphinites, phosphine oxides, phosphines, phosphites, phosphates, phosphonitrilics, phosphorus ester amides, phosphoric acid amides, phosphonic acid amides, phosphinic acid amides, melamine and melamine derivatives, pentaerythritol, triglyceride isocyanurate, novolac and a metal oxide or salt.

12. The composition of claim 11 in which the metal oxide is zinc oxide.

13. A wire or cable sheath made from the composition of claim 1 .

14. A wire or cable comprising the sheath of claim 13 .

Assignees

• Sun Yabin
• Zhu Journey Lu
• Guo David Hong Fei
• Tai Xiangyang
• Cao Yurong
• He Xiaorong A
• Li Leon Bin
• Dow Global Technologies Llc

Inventors

• Sun Yabin
• Zhu Journey Lu
• Guo David Hong Fei
• Tai Xiangyang
• Cao Yurong
• He Xiaorong A
• Li Leon Bin

Classifications

• C09D5/185

  Intumescent paints · CPC title

• C09K21/14

  Macromolecular materials · CPC title

• C08K5/34928

  Salts · CPC title

• C08L23/10 Primary

  Homopolymers or copolymers of propene · CPC title

• C08L2201/02

  Flame or fire retardant/resistant · CPC title