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Filler for self-repairing of insulating layer of cable and preparation method

A cable insulation and self-repair technology, applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of aging damage of cable insulation layer, low repair success rate, poor repair effect, etc., and achieves low production cost and good repair effect. , the effect of improving the success rate and repair efficiency

Inactive Publication Date: 2018-07-20
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems that the widely used cable insulation layer is prone to aging damage, short service life, poor safety, etc., as well as the traditional repair technology process is complicated, the repair success rate is small and the repair effect is not good. The self-repairing filler and preparation method of the insulating layer, thereby effectively realizing the self-repairing process of the cable insulating layer, prolonging the service life and improving the safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Raw material ratio is:

[0039] The parts by mass of each raw material of the self-healing filler are: 4 parts of nano-silica, 0.1 part of coupling agent, 17 parts of urea-formaldehyde resin, 6 parts of curing agent, 0.3 part of organic acid, 30 parts of solvent, and 42.6 parts of prepolymer;

[0040] The coupling agent is isobutyltriethoxysilane; the curing agent is vinyltriamine; the organic acid is oxalic acid; the prepolymer is polyimide prepolymer;

[0041] The preparation process is:

[0042] (1) Add nano-silica and coupling agent to a high-speed mixer for surface modification treatment, then add it to urea-formaldehyde resin, and disperse evenly with the aid of ultrasound to obtain a urea-formaldehyde resin / nano-silica composite material; the high-speed mixer is Vertical high-speed mixer, mixing speed is 125r / min, time is 35min; ultrasonic frequency is 27000Hz, power density is 0.4w / cm 2 , the dispersion time is 22min;

[0043](2) Put the curing agent into the...

Embodiment 2

[0047] Raw material ratio is:

[0048] The parts by mass of each raw material of the self-healing filler are: 3 parts of nano-silica, 0.1 part of coupling agent, 15 parts of urea-formaldehyde resin, 4 parts of curing agent, 0.2 part of organic acid, 25 parts of solvent, and 52.7 parts of prepolymer ;

[0049] The coupling agent is vinyl tris(β-methoxyethoxy)silane; m-phenylenediamine; the organic acid is phthalic acid; the prepolymer is polyurethane prepolymer;

[0050] The preparation process is:

[0051] (1) Add nano-silica and coupling agent to a high-speed mixer for surface modification treatment, then add it to urea-formaldehyde resin, and disperse evenly with the aid of ultrasound to obtain a urea-formaldehyde resin / nano-silica composite material; the high-speed mixer is Horizontal high-speed mixer, the mixing speed is 120r / min, the mixing time is 40min; the ultrasonic frequency is 25000Hz, and the power density is 0.3w / cm 2 , the dispersion time is 30min;

[0052] (...

Embodiment 3

[0056] Raw material ratio is:

[0057] The parts by mass of each raw material of the self-healing filling are: 5 parts of nano-silica, 0.2 parts of coupling agent, 20 parts of urea-formaldehyde resin, 8 parts of curing agent, 0.3 parts of organic acid, 35 parts of solvent, and 31.5 parts of prepolymer ;

[0058] The coupling agent is vinyltrimethoxysilane; the curing agent is diaminodiphenylmethane; the organic acid is benzoic acid; the prepolymer is polyurethane prepolymer;

[0059] The preparation process is:

[0060] (1) Add nano-silica and coupling agent to a high-speed mixer for surface modification treatment, then add it to urea-formaldehyde resin, and disperse evenly with the aid of ultrasound to obtain a urea-formaldehyde resin / nano-silica composite material; the high-speed mixer is Vertical high-speed mixer, the mixing speed is 150r / min, the mixing time is 30min; the ultrasonic frequency is 30000Hz, and the power density is 0.5w / cm 2 , the dispersion time is 15min;...

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Abstract

The invention provides filler for self-repairing of an insulating layer of a cable and a preparation method. Urea formaldehyde resin is added after surface modification treatment through nano silica and uniformly dispersed, a composite is obtained, the composite is sprayed to an enveloping machine with a curing agent added, a capsule with the curing agent as a core and the urea formaldehyde resin / nano silica composite as a shell is formed, a solvent is added, crushing is performed after freezing, a prepolymer is sprayed and irradiated by ultraviolet, and a microcapsule with a double-layer structure is prepared and is the filler for self-repairing of the insulating layer of the cable. By means of the method, the microcapsule is formed by coating the curing agent with urea formaldehyde resinand nano silica composite, self-repairing of the insulating layer of the cable is realized, the success rate and the repairing efficiency of self-repairing are increased, the service life of the cable is prolonged, and the product safety is improved; the preparation process is simple, the production cost is low, the repairing effect is good, and the application prospects are good.

Description

technical field [0001] The invention relates to the field of self-repairing materials, in particular to a self-repairing material for cable insulation layers, in particular to a filler for self-repairing cable insulation layers and a preparation method. Background technique [0002] In recent years, polymer materials have been more and more widely used in industry and life due to their light weight, wear resistance and easy processing. However, during its molding and use, microcracks inside the material will inevitably occur. These microcracks are the root of macroscopic cracks, which will destroy the integrity of polymer materials, so as to affect their performance and service life. Especially when polyethylene, silicone rubber, epoxy resin and other polymers and their composite materials are widely used in electrical insulation, micro-defects represented by electric trees and water trees will inevitably occur inside them during use. The further development of micro-defec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K5/17C08K5/18C08K5/3462C08L23/06B01J13/14
CPCC08K9/10B01J13/14C08K5/17C08K5/18C08K5/3462C08L2203/202C08L23/06
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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