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Modified flame-retardant butadiene styrene rubber for cables and preparation method of rubber
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A styrene-butadiene rubber, modified technology, applied in the rubber field
Inactive Publication Date: 2017-05-24
WUHU HANGTIAN SPECIAL CABLE FACTORY
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[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
[0011] The invention provides a method for preparing a modified flame-retardant styrene-butadiene rubber for cables, comprising:
[0012] 1) mixing starch, chitosan, fly ash, diatomaceous earth and water, followed by fermentation treatment, filtering and taking filter cake to obtain an activated composition;
[0014] In step 1) of the present invention, the amount of each material can be selected within a wide range, but in order to further improve the flame retardancy of the rubber made, preferably, in step 1), relative to 100 parts by weight of starch , the amount of chitosan is 20-33 parts by weight, the amount of fly ...
Embodiment 1
[0023] 1) Mix starch, chitosan, fly ash, diatomaceous earth and water according to the weight ratio of 100:25:44:7-12:200 at 25°C for 40min, then ferment at 40°C for 4h, filter Take filter cake to make activation composition;
[0026] 1) Mix starch, chitosan, fly ash, diatomaceous earth, and water at a weight ratio of 100:20:40:7:150 at 15°C for 30 minutes, then ferment at 35°C for 3 hours, and filter Cake to make the activated composition;
[0027] 2) Styrene butadiene rubber, acrylonitrile-butadiene-acrylate copolymer, polyamide, cottonseed hulls, calcium carbonate, petrolatum, gum arabic, zinc borate, corn oil, vinyl triethoxysilane, thiobis Dilauryl propionate and the activation composition were mixed at 225°C for 2 hours and extruded according to the weight ratio of 100:23:45:17:11:35:10:3:55:8:14:9 to obtain Modified flame retardant styrene-butadiene rubber A2 for cables.
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technical field [0001] The invention relates to rubber, in particular to modified flame-retardant styrene-butadiene rubber for cables and a preparation method thereof. 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 kind of modified flame-retardant styrene-butadiene rubber and its preparation method for cables, the modified flame-retardant styrene-butadiene rubber obtained by the method has ex...
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