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EPDM halogen-free flame-retardant rubber for wires and cables

A EPDM, wire and cable technology, applied in the rubber field, can solve the problem of difficult to achieve the physical properties of the cable, and achieve the effect of reducing the heat release rate, high strength and high temperature resistance and vibration damping, and ensuring safety.

Inactive Publication Date: 2014-05-28
陈剑飞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing halogen-free flame-retardant rubber is often difficult to achieve the physical properties required by the cable, but also has excellent flame-retardant chemical properties

Method used

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  • EPDM halogen-free flame-retardant rubber for wires and cables
  • EPDM halogen-free flame-retardant rubber for wires and cables
  • EPDM halogen-free flame-retardant rubber for wires and cables

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of EPDM halogen-free flame-retardant rubber, its raw material comprises by weight ratio:

[0027]

[0028] The preparation method is as follows:

[0029] 1 Abrasives: put SEBS into the mill to grind the grains below 100 mesh;

[0030] 2 Mixing: Put the SEBS in step 1 and other ingredients into the mixer and mix well;

[0031] 3. Banbury mixing: the reaction kettle is first heated to 100°C, vacuumed, and the reaction kettle is emptied by N2 replacement; the raw material of step (2) is passed through, and the temperature is lowered to 60-70°C, and methylaluminoxane MAO and iron-based complexes are added A binary catalytic system composed of 2-acetyl-6-(2-methylbenimino)ethylpyridine iron chloride was reacted at 65°C and 2MPa for 30 minutes;

[0032] 4 refining: put the finished product in step 3 into a rolling machine and grind it into thin slices;

[0033] 5 Granulation: Process the finished product of step 4 into granules with a granulator;

[0034] 6 cool...

Embodiment 2

[0037]

[0038] Its preparation method is with embodiment 1

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Abstract

The invention discloses EPDM halogen-free flame-retardant rubber for wires and cables. The EPDM halogen-free flame-retardant rubber comprises the following raw materials in parts by weight: 90-110 parts of isoprene, 100-200 parts of EPDM rubber, 3-7 parts of white carbon black, 20-30 parts of SEBS, 25-50 parts of TMT, and 25-15 parts of nano-Mg(OH)2. A preparation method comprises the following steps: (1) the SEBS is put into a pulverizer to be grinded to 100 mesh; (2) the SEBS processed in the step (1) and other ingredients are put into a blender for mixing uniformly; (3) high-pressure polymerization reaction: the temperature of a reaction kettle is 100 DEG C, vacuum pumping is performed, N2 is used for displacement so as to enable the reaction kettle to be empty, and raw material processed in the step (2) is fed in, a binary catalyst system is added, and quick reaction is performed to generate a finished product; (4) the finished product obtained in the step (3) is put into a rubbing mill so as to be milled into slices; (5) granulation: the finished product obtained in the step (4) is processed to be granular; (6) cooling: cooling is performed at room temperature. The EPDM halogen-free flame-retardant rubber disclosed by the invention has a flexible physical property required by the wires and cables, and has an excellent flame-retardant chemical property.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a EPDM halogen-free flame-retardant rubber for electric wires and cables. Background technique [0002] Both natural rubber and synthetic rubber are flammable or flammable. With the wide use of polymer materials such as rubber, especially in construction, transportation, electronic appliances and daily products, the danger and hazard of fire greatly increase. In order to reduce the hazard, flame-retardant rubber has appeared. Existing flame-retardant rubbers can generally be classified into ordinary flame-retardant rubbers, low-halogen flame-retardant rubbers and halogen-free flame-retardant rubbers, among which, the halogen-based flame-retardant effects are I, Br, Cl, and F in descending order. When low-halogen flame-retardant and ordinary flame-retardant rubbers burn, they will still release corrosive halides, causing secondary disasters. Therefore, halogen-free flame retardant is the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L57/02C08L53/02C08K3/22C08K3/36
CPCC08L23/16C08K2201/011C08L57/02C08L2201/02C08L2201/22C08L2203/202H01B3/28
Inventor 陈剑飞
Owner 陈剑飞
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