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High-temperature-resistant fireproof insulating material preparation method

An insulating material and high temperature resistant technology, applied in the field of preparation of high temperature resistant fireproof insulating materials, can solve the problems of short service life, environmental pollution and damage of wires, and achieve the effects of improving insulation performance, reasonable composition ratio and reducing surface tension.

Inactive Publication Date: 2019-04-02
SICHUAN YUGUANG OPTICAL GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor heat resistance, flame retardancy and aging resistance of polyvinyl chloride, the service life of the wire is short, and the safety and reliability are poor.
Therefore, in the current production process, additives of lead, barium, and cadmium will be added to PVC, and these additives containing harmful heavy metal elements will also be damaged after long-term use of the wire, thereby dissolving in the natural environment. environmental pollution
In addition, at present, natural rubber and styrene-butadiene rubber are mostly used in many wire insulation sheaths. This material has good elasticity, but poor weather resistance, and is prone to aging and cracking during actual use. It still cannot meet the needs of some special places or places with harsh environments. need
At present, the purpose of the wire insulation sheath on the market is to be flame-retardant, fire-proof, and heat-insulating. However, part of the loss of the insulation sheath of the wire comes from external wear and erosion, which leads to rapid aging of the wire and a short service life. At present, There is an urgent need for a high temperature resistant and fireproof insulating material for making wire insulation materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a high-temperature-resistant fireproof insulating material, comprising the following steps:

[0025] (1) Weigh raw materials according to the following weight percentages: 40% of methyl vinyl silicone rubber with a vinyl molar content of 0.4%, 25% of hydrogenated nitrile rubber, 15% of natural rubber with a rubber hydrocarbon content greater than 92%, bisphenol F epoxy resin 15%, specific surface area greater than 800m 2 / g fumed silica 15%, titanium dioxide 10%, silicon nitride 2%, diatomaceous earth 2%, magnesium carbonate 3%, paraffin 4%, cerium oxide 0.3%, hexaphenylcyclotrisilane 0.4% alkane, 0.3% additive WLZ-NGY, the natural rubber needs to be plasticized on the open mill before mixing, the plasticating process is as follows: put the natural rubber into the double-roll rubber mixer, adjust the roller distance to 1.5mm for crushing For glue, after the glue is broken, adjust the roller distance to 0.5mm for thinning. The thinning time is 22m...

Embodiment 2

[0030] A method for preparing a high-temperature-resistant fireproof insulating material, comprising the following steps:

[0031] (1) Weigh raw materials according to the following weight percentages: 30% of methyl vinyl silicone rubber with a vinyl molar content of 0.1%, 20% of hydrogenated nitrile rubber, 10% of natural rubber with a rubber hydrocarbon content greater than 92%, bisphenol F epoxy resin 10%, specific surface area greater than 800m 2 / g fumed silica 10%, titanium dioxide 5%, silicon nitride 1%, diatomaceous earth 1%, magnesium carbonate 1%, paraffin 1%, cerium oxide 0.1%, hexaphenylcyclotrisilane nitrogen Alkane 0.1%, additive WLZ-NGY 0.1%, natural rubber needs to be plasticized on the open mill before mixing. For glue, after the glue is broken, adjust the roller distance to 0.5mm for thinning. The thinning time is 20min. After thinning, adjust the roller distance to 1mm for pounding. After pounding, cut the next piece and park for 10h;

[0032] (2) Put fume...

Embodiment 3

[0036] A method for preparing a high-temperature-resistant fireproof insulating material, comprising the following steps:

[0037] (1) Weigh raw materials according to the following weight percentages: 50% of methyl vinyl silicone rubber with a vinyl molar content of 0.5%, 30% of hydrogenated nitrile rubber, 20% of natural rubber with a rubber hydrocarbon content greater than 92%, bisphenol F epoxy resin 20%, specific surface area greater than 800m 2 / g fumed white carbon black 20%, titanium dioxide 15%, silicon nitride 5%, diatomaceous earth 5%, magnesium carbonate 5%, paraffin 5%, cerium oxide 0.5%, hexaphenylcyclotrisilane nitrogen Alkane 0.5%, additive WLZ-NGY 0.5%, natural rubber needs to be masticated on the open mill before mixing, the masticating process is as follows: put the natural rubber into the double-roller rubber mixer, adjust the roller distance to 1.5mm for After the glue is broken, adjust the roller distance to 0.5mm for thinning. The thinning time is 25min...

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Abstract

The invention discloses a high-temperature-resistant fireproof insulating material preparation method, which comprises: (1) weighing raw materials according to the following weight percentage ratio; (2) pouring fumed silica, titanium dioxide, silicon nitride, diatomaceous earth and magnesium carbonate into a material mixing jar, pre-dispersing, transferring into a three-roller mill, carrying out grinding dispersing, and screening to obtain a mixture A; (3) adding a methyl vinyl silicone rubber, a hydrogenated nitrile butadiene rubber, a natural rubber and a bisphenol F epoxy resin into a mixer, heating to a temperature of 180-185 DEG C, mixing for 15-25 min to obtain a mixture B, feeding to a sheet pressing device to prepare sheets, cooling to a temperature of 110-120 DEG C, and carrying out thermal insulation standing for 8-10 h; and (4) pouring the sheets into the mixer, adding paraffin, cerium dioxide, hexaphenylcyclotrisilazane and an additive WLZ-NGY, heating to a temperature of 160-170 DEG Cm mixing for 20-30 min to prepare sheets, and naturally cooling. According to the present invention, the manufacturing method is simple, and the product has advantages of excellent toughness, excellent impact strength, excellent elongation, fire resistance, fire retardation, insulating property, and high-temperature resistance.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a preparation method of a high-temperature-resistant fireproof insulating material. Background technique [0002] With the rapid development of the economy, wires and cables have been widely used in various industries and fields. With the frequent occurrence of electrical fire accidents, the flame retardant problem of wires and cables has gradually attracted the attention of countries all over the world. When the cable burns, a large amount of smoke is released. And toxic and corrosive gases are dangerous factors in fires, which hinder people's safe evacuation and fire fighting work, causing serious losses of life and property. At the same time, with the development of communications, automobile industry and computer industry, especially It is used in many occasions such as marine wires, automotive wires, high-temperature instrument cables, oil drilling platform cables, etc. Of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L15/00C08L7/00C08L63/00C08K13/02C08K3/36C08K3/22C08K3/34C08K7/26C08K5/549C08K3/26
CPCC08K2003/2213C08K2003/2241C08K2003/267C08L83/04C08L2201/02C08L2201/08C08L2205/035C08L15/005C08L7/00C08L63/00C08K13/02C08K3/36C08K3/22C08K3/34C08K7/26C08K5/549C08K3/26
Inventor 张声贵
Owner SICHUAN YUGUANG OPTICAL GLASS CO LTD
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