# US 10,246,639 B2 · Fire retardant compositions and cable separators formed thereof

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,246,639 B2
- Document ID: US10246639B2
- Status: Granted
- Kind: B2
- Application number: 15/597,486
- Filed: 2017-05-17
- Published: 2017-11-23
- Granted: 2019-04-02
- Earliest claimed: 2016-05-17
- Assignees: General Cable Technologies Corporation
- Applicants: General Cable Technologies Corporation
- Inventors: Amjad F. Abu-Ali; Laura Ann Weiss; Qian Zhu; Stephen A. Thwaites
- Web page: https://patentgrep.com/patent/US10246639B2

## CPC

- C09K 21/08: containing halogen
- C08K 3/22: of metals
- C08K 5/02: Halogenated hydrocarbons {(C08K5/0091 takes precedence)}
- C08K 5/098: Metal salts of carboxylic acids
- C08K 5/12: of cyclic polycarboxylic acids
- C08K 5/521: Esters of phosphoric acids, e.g. of H3PO4
- C08K 13/02: Organic and inorganic ingredients
- C09K 21/02: Inorganic materials
- H01B 3/448: {from other vinyl compounds}
- H01B 7/295: using material resistant to flame
- C08K 2201/014: Additives containing two or more different additives of the same subgroup in C08K
- C08K 2201/019: the composition being defined by the absence of a certain additive
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})

## Abstract

A fire retardant composition is disclosed. The composition includes polyvinyl chloride, a plasticizer, a brominated fire retardant additive, a fire retardant synergist, and a metal stabilizer. Cable separators formed of the fire retardant composition are also disclosed.

## Claims

### Claim 1

A fire retardant composition comprising:
polyvinyl chloride;
about 10 parts to about 40 parts, by weight, of a plasticizer comprising one or more of a trimellitate ester and a phosphate ester;
about 0.1 part to about 25 parts, by weight, of a brominated fire retardant additive;
about 25 parts to about 75 parts, by weight, of a fire retardant synergist comprising a metal hydroxide;
about 1 part to about 10 parts, by weight, of a mixed metal stabilizer; and
wherein the fire retardant composition is substantially free of a halogenated plasticizer.

### Claim 2 (depends on 1)

The fire retardant composition of claim 1, wherein the trimellitate ester comprises one or more of tris-(octyl, decyl)-trimellitate, tri (heptyl, nonyl) trimellitate, and linear trinonyltrimellitate.

### Claim 3 (depends on 1)

The fire retardant composition of claim 1, wherein the phosphate ester comprises phosphoric acid dodecyl ester diphenyl ester.

### Claim 4 (depends on 1)

The fire retardant composition of claim 1, wherein the plasticizer further comprises a phthalate plasticizer comprising diundecyl phthalate.

### Claim 5 (depends on 1)

The fire retardant composition of claim 1, wherein the brominated fire retardant additive comprises ethylene bis(tetrabromo phthalimide).

### Claim 6 (depends on 1)

The fire retardant composition of claim 1, further comprising about 0.1 part to about 25 parts, by weight, of a second fire retardant additive comprising one or more of antimony trioxide and zinc hydroxystannate.

### Claim 7 (depends on 1)

The fire-retardant composition of claim 1, wherein the fire retardant synergist comprises aluminum hydroxide.

### Claim 8 (depends on 1)

The fire-retardant composition of claim 1, wherein the mixed metal stabilizer comprises calcium-zinc metal carboxylate.

### Claim 9 (depends on 1)

The fire retardant composition of claim 1, further comprising about 0.1 part to about 1 part of a lubricant.

### Claim 10 (depends on 1)

The fire retardant composition of claim 1, further comprising about 40 parts or less of a smoke suppressant.

### Claim 11 (depends on 10)

The fire retardant composition of claim 10, wherein the smoke suppressant comprises ammonium octamolybdate.

### Claim 12 (depends on 1)

The fire retardant composition of claim 1 has a limiting oxygen index of about 50% or greater.

### Claim 13 (depends on 1)

The fire retardant composition of claim 1 has a dielectric constant of about 3.4 or less when measured at about 10 MHz.

### Claim 14 (depends on 1)

The fire retardant composition of claim 1 has a dissipation factor of about 0.020 or less when measured at about 10 MHz.

### Claim 15 (depends on 1)

The fire retardant composition of claim 1 is foamed and has a foam rate of about 30% or less.

### Claim 16 (depends on 1)

A cable comprising a cable separator formed of the fire retardant composition of claim 1.

### Claim 17 (depends on 16)

The cable of claim 16 passes the requirements of National Fire Protection Association (“NFPA”) standard 262.

### Claim 18

A fire retardant composition comprising:
polyvinyl chloride;
about 10 parts to about 40 parts, by weight, of a plasticizer comprising one or more of a trimellitate ester and a phosphate ester;
about 0.1 part to about 25 parts, by weight, of a brominated fire retardant additive;
about 0.1 to about 25 parts, by weight, of a second fire retardant additive comprising antimony trioxide about 25 parts to about 75 parts, by weight, of a fire retardant synergist comprising a metal hydroxide;
about 1 part to about 10 parts, by weight, of a mixed metal stabilizer; and
wherein the fire retardant composition is substantially free of a halogenated plasticizer.