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Flame-retardant ethylene-propylene-diene monomer rubber sleeve for cables and preparation method thereof
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A technology of EPDM rubber and cable, which is applied in the rubber field to achieve the effect of preventing combustion reaction
Inactive Publication Date: 2018-11-23
南通智达光缆材料有限公司
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Problems solved by technology
[0002] The buffer layer of the cable is mostly composed of rubber. The existing rubber buffer layer can only play a buffer role. In the case of accidental fire, the rubber will decompose into flammable low-molecular substances at high temperature
Method used
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preparation example Construction
[0013] The invention provides a method for preparing a flame-retardant EPDM rubber sheath for cables, the preparation method comprising:
[0015] B, vulcanizing agent and described masterbatch are mixed to carry out vulcanization treatment for the first time;
[0016] c. Carrying out the second vulcanization of the masterbatch after the first vulcanization in an oven to make flame-retardant EPDM rubber for cables;
[0017] d. Extruding the cable with flame-retardant EPDM rubber to make a flame-retardant EPDM rubber sheath for the cable.
[0018] In the step a of the present invention, the consumption of each raw material can be selected in a wide range, but in order to make the flame-retardant EPDM rubber sheath for the cable that makes have more excellent flame retardancy, preferably, in step a Among them...
[0028] b. At 150°C and 11Mpa, mix 0.5 kg of bis-tert-butyl peroxidecumene and 100 kg of the above masterbatch for 17 minutes for the first vulcanization treatment;
[0029] c. At 215 ° C, the masterbatch after the first vulcanization is vulcanized for the second time in an oven for 4 hours to make flame-retardant EPDM rubber for cables;
[0030] d. Extrude the flame-retardant EPDM rubber for the above cable to make a flame-retardant EPDM rubber sheath A1 for the cable.
[0031] The flame retardant performance parameters of the flame retardant EPDM rubber sheath for the cable are shown in Table 1.
Embodiment 2
[0033] a, the grade is EPDM rubber 100kg of 4770R, the grade is fumed white carbon black 190kg of A200, 7kg chlorinated paraffin-50, aluminum hydroxide 55kg, hexabromocyclododecane 8kg, boehmite 10kg and Sodium molybdate 1.2kg mixing is made masterbatch;
[0034] b. At 170°C and 12Mpa, mix 0.8 kg of bis-tert-butyl peroxidecumene and 100 kg of the above masterbatch for 20 minutes for the first vulcanization treatment;
[0035] c. At 220 ° C, the masterbatch after the first vulcanization is vulcanized for the second time in an oven for 5 hours to make flame-retardant EPDM rubber for cables;
[0036] d. Extrude the flame-retardant EPDM rubber for the above cable to make a flame-retardant EPDM rubber sheath A2 for the cable.
[0037] The flame retardant performance parameters of the flame retardant EPDM rubber sheath for the cable are shown in Table 1.
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Abstract
The invention discloses a flame-retardant ethylene-propylene-dienemonomer rubber sleeve for cables and a preparation method thereof. The preparation method comprises the following steps: a, mixing ethylene-propylene-dienemonomer rubber, gas-phase process white carbon black, chlorinated paraffin, aluminum hydroxide, hexabromocyclododecane, boehmite and sodiummolybdate to prepare masterbatch; b,mixing a vulcanizing agent with the masterbatch to perform primary vulcanizing; c, performing secondary vulcanizing on the masterbatch subjected to the primary vulcanizing to prepare the flame-retardant ethylene-propylene-dienemonomer rubber for the cables; d, performing extrusion molding on the flame-retardant ethylene-propylene-diene monomer rubber for the cables to prepare the flame-retardantethylene-propylene-diene monomer rubber sleeve for the cables. The flame-retardant ethylene-propylene-diene monomer rubber sleeve for the cables has excellent flame retardance.
Description
technical field [0001] The invention relates to rubber, in particular to a flame-retardant EPDM rubber sheath for cables. Background technique [0002] The buffer layer of the cable is mostly composed of rubber. The existing rubber buffer layer can only play a buffer role. In the case of an accidental fire, the rubber will decompose into flammable low-molecular substances at high temperatures. The flammable low-molecular-weight substances will quickly undergo a violent oxidation reaction with oxygen, and the oxidation reaction will release a large amount of heat, which will further promote the decomposition of rubber. Oxidation reaction until the rubber burns out. Contents of the invention [0003] The object of the present invention is to provide a flame-retardant EPDM rubber sheath for cables and a preparation method thereof. The flame-retardant EPDM rubber sheath for cables prepared by the method has excellent flame retardancy. [0004] In order to achieve the above o...
Claims
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Application Information
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