Preparation method of novel insulated rubber

An insulating rubber, a new type of technology, applied in the field of rubber materials, can solve the problems of low strength of pure rubber, intolerance to tearing, low insulation resistivity, etc., to achieve good interface adhesion, increase production costs, and improve the effects of mechanical properties

Inactive Publication Date: 2013-05-15
QINGDAO UNIV OF SCI & TECH
View PDF0 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The strength of pure rubber is generally low, which cannot meet the requirements of use, and a large amount of carbon black must be added for reinforcement
However, when carbon black reinforced rubber is used as an electrical insulating material, the dielectric loss is large and the insulation resistivity is low, which limits the application occasions.
At present, there are many reports on the use of thermotropic liquid crystal materials to generate microfiber-reinforced polymers in situ, but the conditions for thermotropic liquid crystal materials to generate microfibers in the polymer matrix are relatively harsh, and there are few types of liquid crystal raw materials and the price is expensive. Large-scale promotion in industry is difficult;
[0003] In addition, it has been reported to use magnesium methacrylate or sodium methacrylate to generate nanoparticles in situ to reinforce rubber, but due to many reasons such as high cost, poor resistance to tearing, and poor effect on non-polar rubber filled with fillers, etc. without being promoted
[0004] Moreover, these two methods are not resistant to partial discharge, and when used as electrical insulating materials, the service life is short

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of novel insulated rubber
  • Preparation method of novel insulated rubber
  • Preparation method of novel insulated rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of liquid oligomer modified insulating rubber, comprising the following sequential steps:

[0026] (1) Weigh 100 parts of nitrile rubber (model NBR-41), 1.2 parts of N-cyclohexyl-2-benzothiazole sulfenamide (promoting CZ), 5 parts of zinc oxide (ZnO), stearin 2 parts of acid (SA), 1 part of dihydroquinoline polymer (anti-RD), 0.5 parts of tetramethylthiuram disulfide (promoting TMT D), 1.5 parts of sulfur (S), bisphenol A liquid epoxy Resin (EP) 12 parts, epoxy resin curing agent 6 parts.

[0027] (2) Add nitrile rubber, CZ, ZnO, SA, and RD1 in turn on the double-roll mill with the roll temperature at 40-50°C, and mix the above-mentioned raw materials evenly after mixing for 4-8 minutes. .

[0028] (3) Stir the liquid epoxy resin and its curing agent evenly with a stirring rod.

[0029] (4) Add the mixture in (3) to the rubber compound in (2) and knead for 4-8min, add TMTD and S after kneading evenly, and then knead for 4-6min before taking off t...

Embodiment 2

[0039] A preparation method of liquid oligomer modified insulating rubber, comprising the following sequential steps:

[0040] (1) Weigh 100 parts of chloroprene rubber (CR), 4 parts of magnesium oxide (MgO), 5 parts of ZnO, 0.5 parts of SA, and 8 parts of liquid phenolic resin (PF).

[0041] (2) Add neoprene, MgO, ZnO, and SA in turn on a double-roll mill with the roll temperature at 40-50°C, and mix the above-mentioned raw materials evenly after mixing for 4-8 minutes.

[0042] (3) Add the liquid phenolic resin to the compounded compound in (2), mix for 4-8 minutes, then release the film, and store it for more than 8 hours for later use.

[0043] (4) On the flat vulcanizer, vulcanize the material mixed in (3), the conditions for vulcanization:

[0044] 150°C×20min, the pressure is 15MPa.

[0045] (5) Take out the sample in (4), punch out the sample according to the national standard, and test various performance indicators of the composite system according to the national ...

Embodiment 3

[0054] A preparation method of liquid oligomer modified insulating rubber, comprising the following sequential steps:

[0055] (1) 100 parts of ethylene-propylene rubber (brand EP-33), 5 parts of ZnO, 1 part of SA, 1 part of anti-RD, 0.5 parts of mercaptobenzothiazole (promoting M), 0.5 parts of paraffin, 1.5 parts of promoting TMTD, S1.5 parts, liquid phenolic resin (PF) 12 parts.

[0056] (2) On the double-roll mill, under the condition that the roll temperature is 60-80°C, add ethylene-propylene rubber, ZnO, SA, anti-RD, M-promoting, paraffin in turn, and after mixing for 4-8min, mix the above raw materials well mixed.

[0057] (3) Add liquid phenolic resin to the mixed material in (2) and knead for 4-8 minutes.

[0058] (4) Add the material mixed in (3) to promote TMTD and S, mix evenly, and then release the tablet, and park it for more than 8 hours for later use.

[0059] (5) On a flat vulcanizer, vulcanize the material mixed in (4), vulcanization conditions: 160°C × 2...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a preparation method of a novel insulated rubber. The method sequentially includes the steps of: (1) at the mixing stage of rubber processing, on the basis of not changing a rubber system formula, adding a mixed system of a liquid oligomer and its curing agent into raw materials, and under a shearing effect in the mixing process, refining the liquid oligomer into a fine liquid and dispersing it uniformly in a rubber matrix; and (2) at a high temperature vulcanization stage, letting the oligomer undergo in situ polymerization to generate rigid particles and microfiber composed of large molecules, or making the oligomer and rubber molecules form a interpenetrating network structure. The generated rigid particles, microfiber and interpenetrating network structure have a good interface bonding force with the rubber matrix, fillers, metals and the like, and have a substantially improved reinforcement effect on the rubber matrix. The reinforced rubber has corona resistance, insulation life and certain flame retardant effect. With a simple process, the preparation method makes no change to traditional rubber processing methods, and has the characteristics of convenient operation and easily available raw materials. The prepared insulated rubber is applicable to various cables and other low-voltage electrically insulated rubber products.

Description

technical field [0001] The invention relates to a method for modifying insulating rubber with a liquid oligomer, in particular to a method for uniformly dispersing a mixed system of a liquid low polymer and its curing agent in a rubber matrix to generate rigid particles and microfibers in situ Or interpenetrating network structure-based reinforcement structure, which has a significant reinforcing effect on the rubber matrix, and significantly improves its corona resistance and insulation life. It belongs to the field of rubber materials. Background technique [0002] The strength of pure rubber is generally low, which cannot meet the requirements of use, and a large amount of carbon black must be added for reinforcement. However, when carbon black reinforced rubber is used as an electrical insulating material, the dielectric loss is large and the insulation resistivity is low, which limits the application occasions. At present, there are many reports on the use of thermotr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24C08L7/00C08L9/00C08L9/06C08L9/02C08L11/00C08L83/04C08L23/22C08L23/16C08L23/28C08L53/02
Inventor 叶林忠雷清泉
Owner QINGDAO UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap