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Flame retardant composition for electric cable outer sheaths, and preparation method thereof

A composition and cable technology, applied in the direction of rubber insulators, organic insulators, etc., can solve the problem of low flame retardant efficiency of inorganic flame retardants, affecting the processing performance, insulation performance and mechanical properties of EPDM rubber and its composite materials, and fracture Elongation deterioration and other problems, to achieve the effect of reducing entanglement, improving interfacial compatibility, and improving processing performance

Inactive Publication Date: 2019-10-22
四川德华电气有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most EPDM rubbers use magnesium hydroxide and aluminum hydroxide as flame retardants. The flame retardant efficiency of such inorganic flame retardants is low, and a large amount of filling is required to make EPDM rubber reach the ideal level. Flame retardant grade, but it will also affect the processing performance, insulation performance and mechanical properties of EPDM rubber and its composite materials, especially the elongation at break.

Method used

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  • Flame retardant composition for electric cable outer sheaths, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A flame retardant composition for an outer sheath of a cable, comprising the following components in parts by weight:

[0047] 60 parts of EPDM rubber;

[0048] 40 parts of low-density polyethylene;

[0049] 0.5 parts of polyethylene wax;

[0050] 4,4'-bis(α,α-dimethylbenzyl)diphenylamine: 4 parts;

[0051] p-Benzoquinone dioxime: 0.5 part;

[0052] Dicumyl peroxide: 2 parts;

[0053] Flame retardant filler: 50 parts

[0054] Aluminum diethylalkylphosphinate: 1 part.

[0055] Described flame-retardant filler is magnesium hydroxide / melamine urate compound, and its preparation method comprises the steps:

[0056] 1) Weigh 33.5 parts of magnesium hydroxide and place it in a vacuum drying oven, and dry it for 5 hours at 60 degrees Celsius for subsequent use;

[0057] 2) Weigh 3.5 parts of γ-aminopropyltriethoxysilane and 35 parts of toluene and mix and dilute;

[0058] 3) Place the γ-aminopropyltriethoxysilane toluene dilution obtained in the above step 2) and the m...

Embodiment 2

[0066] A flame retardant composition for an outer sheath of a cable, comprising the following components in parts by weight:

[0067] EPDM rubber: 65 parts;

[0068] Low-density polyethylene: 35 parts;

[0069] Polyethylene wax: 1.2 parts;

[0070] 4,4'-bis(α,α-dimethylbenzyl)diphenylamine: 7 parts;

[0071] p-Benzoquinone dioxime: 2 parts;

[0072] Dicumyl peroxide: 3.5 parts;

[0073] Flame retardant filler: 80 parts

[0074] Aluminum diethylalkylphosphinate: 3.5 parts.

[0075] Described flame-retardant filler is magnesium hydroxide / melamine urate compound, and its preparation method comprises the steps:

[0076] 1) Weigh 59 parts of magnesium hydroxide and place it in a vacuum drying oven, and dry it for 5 hours at 60 degrees Celsius for subsequent use;

[0077] 2) Weigh 7.5 parts of γ-aminopropyltriethoxysilane and 75 parts of toluene and mix and dilute;

[0078] 3) Place the γ-aminopropyltriethoxysilane toluene dilution obtained in the above step 2) and the magne...

Embodiment 3

[0086] A flame retardant composition for an outer sheath of a cable, comprising the following components in parts by weight:

[0087] EPDM rubber: 70 parts;

[0088] Low-density polyethylene: 30 parts;

[0089] Polyethylene wax: 2 parts;

[0090] 4,4'-bis(α,α-dimethylbenzyl)diphenylamine: 10 parts;

[0091] p-Benzoquinone dioxime: 3 parts;

[0092] Dicumyl peroxide: 5 parts;

[0093] Flame retardant filler: 100 parts

[0094] Aluminum diethylalkylphosphinate: 5 parts.

[0095] Described flame-retardant filler is magnesium hydroxide / melamine urate compound, and its preparation method comprises the steps:

[0096] 1) Weigh 77.5 parts of magnesium hydroxide and place it in a vacuum drying oven, and dry it for 5 hours at 60 degrees Celsius for subsequent use;

[0097] 2) Weigh 11.5 parts of γ-aminopropyltriethoxysilane and 115 parts of toluene and mix and dilute;

[0098] 3) Place the γ-aminopropyltriethoxysilane toluene dilution obtained in the above step 2) and the magne...

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Abstract

The invention provides an insulating composition for electric cable outer sheaths, wherein the insulating composition comprises, by weight, 60-70 parts of ethylene propylene diene monomer, 30-40 partsof low density polyethylene, 0.5-2 parts of polyethylene wax, 4-10 parts of an antioxidant, 0.5-3 parts of p-benzoquinone dioxime, 2-5 parts of dicumyl peroxide, 50-100 parts of a flame retardant filler, and 1-5 parts of a synergistic flame retardant. According to the present invention, by adding an appropriate amount of polyethylene wax to the blended composition, the entanglement effect of thepolymer molecular chain is reduced, the processing property of the blended composition is improved, magnesium hydroxide is wetted, and the interface compatibility between magnesium hydroxide and polymers is improved, such that magnesium hydroxide is uniformly dispersed in the polymer, and the mechanical property reducing of the blended composition due to the agglomeration of the magnesium hydroxide particles is avoided; and the invention further provides a flame retardant composition for electric cable outer sheaths, and a preparation method thereof.

Description

technical field [0001] The invention relates to the field of cables, in particular to a composition for a cable outer sheath and a cable containing the composition. Background technique [0002] In the cable preparation process, PVC is commonly used as the base material for the cable sheath. However, since PVC contains a large amount of chlorine, it will release a large amount of toxic gas when burned, which is harmful to the human body and the environment. With the continuous improvement of environmental protection requirements, the use of insulating materials replacing PVC has become an inevitable trend in the development of cables. Under this trend, EPDM rubber and its composite materials are widely used in the preparation of cable outer sheaths as base materials to replace PVC. EPDM rubber is mainly composed of ethylene, propylene, and unsaturated third monomers. It is made of ternary copolymerization, has excellent heat resistance and weather resistance, and chemical s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/06C08K13/02C08K5/18C08K5/14C08K5/5313C08K3/22C08K5/3492H01B3/28
CPCC08L23/16H01B3/28C08L2203/202C08L2201/02C08L2205/025C08L2205/03C08L2207/066C08K2003/2224C08L23/06C08K13/02C08K5/18C08K5/14C08K5/5313C08K3/22C08K5/34928
Inventor 张吉安陈楚畅
Owner 四川德华电气有限责任公司
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