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Flame-retardant styrene-butadiene rubber sheath for cables and preparation method thereof

A styrene-butadiene rubber and cable technology, which is applied in the rubber field to achieve the effect of preventing the combustion reaction

Active Publication Date: 2016-05-25
JIAXING TOSUN RUBBER&PLASTIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Examples

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preparation example Construction

[0013] The invention provides a method for preparing a flame-retardant styrene-butadiene rubber sheath for cables, the preparation method comprising:

[0014] a. Mixing styrene-butadiene rubber, fumed silica, chlorinated paraffin, tribromophenyl acrylate, zinc borate, antimony trioxide and sodium molybdate to make masterbatch;

[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 styrene-butadiene rubber for cables;

[0017] d. Extruding the cable with flame-retardant styrene-butadiene rubber to make a flame-retardant styrene-butadiene 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 styrene-butadiene rubber sheath for cables prepared has ...

Embodiment 1

[0027] a, the brand is styrene-butadiene rubber 100kg of SBS501, the brand is fumed white carbon black 180kg of A200, 5kg chlorinated paraffin-50, tribromophenyl acrylate 45kg, zinc borate 6kg, antimony trioxide 9kg and molybdic acid Mix 0.8kg of sodium to make masterbatch;

[0028] b. At 150°C and 11Mpa, mix 0.5 kg of bis-tert-butyl peroxide cumene 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 styrene-butadiene rubber for cables;

[0030] d. Extrude the flame-retardant styrene-butadiene rubber for the cable to make a flame-retardant styrene-butadiene rubber sheath A1 for the cable.

[0031] The flame retardant performance parameters of the flame retardant styrene-butadiene rubber sheath for the cable are shown in Table 1.

Embodiment 2

[0033] a, the brand is styrene-butadiene rubber 100kg of SBS501, the brand is fumed white carbon black 190kg of A200, 7kg chlorinated paraffin-50, tribromophenyl acrylate 55kg, zinc borate 8kg, antimony trioxide 10kg and molybdic acid Mix 1.2kg of sodium to make masterbatch;

[0034] b. At 170°C and 12Mpa, mix 0.8 kg of bis-tert-butyl peroxide cumene 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 styrene-butadiene rubber for cables;

[0036] d. Extrude the flame-retardant styrene-butadiene rubber for the cable to make a flame-retardant styrene-butadiene rubber sheath A2 for the cable.

[0037] The flame retardant performance parameters of the flame retardant styrene-butadiene rubber sheath for the cable are shown in Table 1.

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Abstract

The invention discloses a flame-retardant styrene-butadiene rubber sleeve for cables and a preparation method of the flame-retardant styrene-butadiene rubber sleeve, wherein the preparation method comprises the following steps: a, mixing styrene-butadiene rubber, fumed silica, chlorinated paraffin, tribromophenyl acrylate, zinc borate, antimony trioxide and sodium molybdate to prepare a masterbatch; b, mixing a vulcanizing agent with the masterbatch to perform vulcanization treatment for the first time; c, performing vulcanization on the masterbatch vulcanized for the first time in an oven for the second time to prepare the flame-retardant styrene-butadiene rubber sleeve. According to the invention, the flame-retardant styrene-butadiene rubber sleeve prepared according to the method above has excellent flame retardancy.

Description

technical field [0001] The invention relates to rubber, in particular to a flame-retardant styrene-butadiene 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 styrene-butadiene rubber sheath for cables and a preparation method thereof. The flame-retardant styrene-butadiene rubber sheath for cables prepared by the method has excellent flame retardancy. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/06C08L91/06C08K13/02C08K3/36C08K3/22C08K3/38C08K3/24C08K5/136C08J3/24H01B3/28
CPCC08J3/247C08L9/06C08L2201/02C08L2203/202H01B3/28C08L91/06C08K13/02C08K3/36C08K3/2279C08K2003/387C08K3/24C08K5/136
Inventor 佘晨何成龙何源杨趁芬
Owner JIAXING TOSUN RUBBER&PLASTIC CO LTD