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Flame-retardant natural rubber for cables and preparation method thereof
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A natural rubber and cable technology, applied in the rubber field to prevent combustion reaction
Active Publication Date: 2016-08-24
滁州君越高分子新材料有限公司
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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
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preparation example Construction
[0012] The invention provides a preparation method of flame-retardant natural rubber for cables, the preparation method comprising:
[0014] B, vulcanizing agent and described masterbatch are mixed to carry out vulcanization treatment for the first time;
[0015] c. The masterbatch after the first vulcanization is vulcanized for the second time in an oven to make a flame-retardant natural rubber for cables.
[0016] In step a of the present invention, the amount of each raw material can be selected in a wide range, but in order to make the flame-retardant natural rubber for cables that is prepared have more excellent flame retardancy, preferably, in step a, relative to 100 parts by weight of the natural rubber, the amount of the cresyl diphenyl phosphate is 130-150 parts by weight, the amount of the...
[0026] 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;
[0027] c. At 215° C., the masterbatch after the first vulcanization was vulcanized for the second time in an oven for 4 hours to prepare flame-retardant natural rubber A1 for cables.
[0028] The flame retardant performance parameters of the flame retardant natural rubber for cables are shown in Table 1.
Embodiment 2
[0030] a. The brand is 100kg of natural rubber of SVR-3L, 150kg of cresyl diphenyl phosphate, 7kg of chlorinated paraffin-50, 55kg of magnesium bicarbonate, 8kg of decabromodiphenyl ether, 10kg of boehmite and sodium molybdate 1.2kg mixed to make masterbatch;
[0031] 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;
[0032] c. At 220° C., the masterbatch after the first vulcanization was vulcanized for the second time in an oven for 5 hours to prepare flame-retardant natural rubber A2 for cables.
[0033] The flame retardant performance parameters of the flame retardant natural rubber for cables are shown in Table 1.
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Abstract
The invention discloses a flame-retardant natural rubber for a cable and a preparation method thereof. The preparation method comprises the following steps: a, mixing natural rubber, cresoldiphenyl phosphate, chlorcosane, magnesiumbicarbonate, decabromodiphenyl ether, boehmite and sodiummolybdate to obtain master rubber; b, mixing a vulcanizing agent with the master rubber and vulcanizing for the first time; and c, vulcanizing the master rubber vulcanized for the first time in an oven for the second time so as to obtain the flame-retardant natural rubber for the cable. The flame-retardant natural rubber for the cable prepared by using the method has excellent flame resistance.
Description
technical field [0001] The invention relates to rubber, in particular to a flame-retardant natural rubber 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 natural rubber for cables and a preparation method thereof. The flame-retardant natural rubber for cables prepared by the method has excellent flame retardancy. [0004] In order to achieve the above object, the i...
Claims
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Application Information
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