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Polyurethane modified rubber composite material, preparation method and application of polyurethane modified rubber composite material in lightning arrester composite jacket

A technology of polyurethane modification and composite materials, applied in the direction of resistor shell/packaging shell/potting, overvoltage protection resistor, varistor, etc., can solve the problem of reducing the heat resistance of silicone rubber and achieve compatibility The effect of increasing heat resistance and increasing mechanical properties

Pending Publication Date: 2022-05-27
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Modification of blends with reinforcing fillers to modify silicone rubber can greatly improve the performance. For example, the blending of silicone rubber and low-density polyethylene is commonly used to improve the electrical and mechanical properties of silicone rubber, but this blending requires Adding a compatibilizer, the addition of a compatibilizer reduces the heat resistance of silicone rubber

Method used

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  • Polyurethane modified rubber composite material, preparation method and application of polyurethane modified rubber composite material in lightning arrester composite jacket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Preparation of Polyurethane Prepolymer

[0036] A preparation method of a polyurethane prepolymer, comprising the steps:

[0037] (1) Weigh each raw material by raw material composition: by weight, 39.96 parts of isophorone diisocyanate, 36 parts of polyethylene glycol-200036, 0.015 part of dibutyltin dilaurate, 2-hydroxyethyl methacrylate 23.40 parts, 0.05 part of azobisisobutyronitrile, for use;

[0038] (2) Add isophorone diisocyanate and polyethylene glycol-2000 into the flask, put the flask in a water bath at 50 to 55°C and stir, and after the polyethylene glycol-2000 is dissolved, add dilauric acid Dibutyltin was stirred for 5min to obtain turbid mixed solution C, for subsequent use;

[0039] (3) azobisisobutyronitrile is added to 2-hydroxyethyl methacrylate and configured to be solution D, for subsequent use;

[0040] (4) Stir the mixed solution C for 10 min to keep it in a turbid state, then add solution D and continue stirring for 30 min to obtain ...

Embodiment 2

[0041] Example 2 Preparation of polyurethane-modified rubber composites

[0042] A polyurethane-modified rubber composite material includes component A and component B, wherein component A and component B are mixed in a ratio of 300:0.6 by weight; the component B is a polyurethane prepolymer, which is The raw material composition and preparation method are the same as those in Example 1.

[0043] The A component includes the following raw materials by weight: 100 parts of methyl vinyl silicone rubber (the molar content of vinyl is 0.08%), 21 parts of low-density polyethylene, 8 parts of ethylene-vinyl acetate copolymer, gas phase 45 parts of white carbon black, 8 parts of polydimethylsiloxane, 2.5 parts of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, 100 parts of aluminum hydroxide, oxide 3 parts of zinc, 4.5 parts of stearic acid, 3.5 parts of silane coupling agent A-174.

[0044]The preparation method of the polyurethane-modified rubber composite material comprises the fol...

Embodiment 3

[0049] Example 3 Preparation of polyurethane-modified rubber composites

[0050] A polyurethane-modified rubber composite material includes component A and component B, wherein component A and component B are mixed in a ratio of 300:1.4 by weight; the component B is a polyurethane prepolymer, which is The raw material composition and preparation method are the same as those in Example 1; the raw material composition of the A component and the preparation method of the rubber composite are the same as those in Example 2.

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Abstract

The invention provides a polyurethane-modified rubber composite material, a preparation method and application of the polyurethane-modified rubber composite material in a composite outer sleeve of a lightning arrester. The polyurethane modified rubber composite material comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 15-30 parts of low-density polyethylene, 7-13 parts of an ethylene-vinyl acetate copolymer, 45-50 parts of white carbon black, 8-12 parts of polydimethylsiloxane, 2-3 parts of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 100-120 parts of aluminum hydroxide, 3-4 parts of zinc oxide, 4-6 parts of stearic acid and 3-4 parts of a silane coupling agent; the component B is a polyurethane prepolymer, and the polyurethane prepolymer is prepared from the following components in parts by weight: 39 to 40 parts of isophorone diisocyanate, 35 to 37 parts of polyether polyol, 0.01 to 0.02 part of dibutyltin dilaurate, 23 to 24 parts of 2-hydroxyethyl methacrylate and 0.04 to 0.06 part of azodiisobutyronitrile. The polyurethane modified rubber composite material shows better insulativity, weather resistance and mechanical properties in volume resistivity, epitaxial initial decomposition temperature, tensile strength and elongation at break data, and is suitable for a composite jacket of a lightning arrester.

Description

technical field [0001] The invention relates to a polyurethane-modified rubber composite material, a preparation method and its application in a lightning arrester composite jacket, and belongs to the technical field of silicon rubber preparation. Background technique [0002] The composite jacket arrester is a complex composed of components such as silicone rubber composite jacket, epoxy tube, resistor sheet, inner cavity filler and connecting hardware. Compared with porcelain jacketed arresters, composite jacketed arresters have the advantages of small size, light weight, strong sealing and pollution resistance, and good explosion-proof performance and weather resistance. Therefore, composite jacketed arresters have been widely used in power systems. [0003] At present, the composite jacket material of the arrester often has problems such as hardening, embrittlement, and even cracking due to long-term operation, which seriously affects the insulation performance and mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/04C08L23/06C08L23/08C08L75/08C08K7/26C08K5/14C08K3/22C08K5/09C08K5/5425C08K13/04C08G18/34C08G18/48C08G18/66C08G18/75H01C7/12H01C1/02
CPCC08L83/04C08G18/672C08G18/4825C08G18/6666C08G18/755H01C7/12H01C1/02C08K2003/2227C08K2003/2296C08L2201/08C08L23/06C08L23/0853C08L75/08C08K7/26C08K5/14C08K3/22C08K5/09C08K5/5425C08K13/04C08G18/48
Inventor 周立明方少明高丽君李莹黄海靳国青
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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