Fluorine-containing terminal group active hydroxyl friction-resistant high-shear-resistant composite rubber material

A composite rubber and anti-friction technology, which is applied in coatings and other directions, can solve the problems of non-discovered friction-resistant rubber and plastic materials containing fluorine-containing end groups and active hydroxyl groups, and achieve the goals of overcoming interfacial bonding force, improving friction performance, and excellent thermal performance. Effect

Active Publication Date: 2021-09-21
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, no reports have been found on synthetic anti-friction rubber and plastic materials containing fluorine-containing end groups and active hydroxyl groups.

Method used

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  • Fluorine-containing terminal group active hydroxyl friction-resistant high-shear-resistant composite rubber material
  • Fluorine-containing terminal group active hydroxyl friction-resistant high-shear-resistant composite rubber material
  • Fluorine-containing terminal group active hydroxyl friction-resistant high-shear-resistant composite rubber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] (1) Preparation and purification of dihalogenated monomers with different soft segment lengths:

[0080] Add 2000 g of ether-containing diamine containing 33 alkyl carbons, 80 g of sodium hydroxide, and 3 g of sodium dodecylbenzenesulfonate into 5000 g of deionized water in sequence, and dissolve at room temperature to obtain an ether-containing diamine solution; Mix 317g of fluorobenzoyl chloride and 5000g of dichloromethane evenly and add it to the container, then add the ether-containing diamine solution prepared above into the container dropwise, and continue the reaction at room temperature for 5h after the diamine solution is added dropwise , to generate difluoro monomers containing 33 alkylcarbodiamides; the organic solvent in the above monomers was distilled and recovered, and the viscous crude product was collected, washed 5 times with water, solvent removed, and dried at 110°C for 6 hours to obtain purified 33 alkyl carbodiamide difluoro monomers, the structur...

Embodiment 2

[0089] (1) Preparation and purification of dihalogenated monomers with different soft segment lengths:

[0090] Add 400g of ether-containing diamine containing 5 alkyl carbons, 90g of lithium hydroxide, and 10g of PEG-1000 into 4000g of deionized water in sequence, and dissolve at room temperature to obtain an ether-containing diamine solution; 317g of p-fluorobenzoyl chloride Mix it with 4000g of chloroform evenly and add it to the container, then drop the prepared diamine solution containing ether into the container. After the diamine solution is added dropwise, continue to react for 3 hours at room temperature to form a Carbodiamide difluoro monomer; distill and recover the organic solvent in the above monomers, collect the viscous crude product, wash with water 4 times, remove the solvent, and dry at 100°C for 24 hours to obtain purified carbodiamide containing 5 alkyl groups Difluoromonomer, structural formula is as follows (NMR such as figure 2 shown):

[0091]

[...

Embodiment 3

[0099] (1) Preparation and purification of dihalogenated monomers with different soft segment lengths:

[0100] Add 230 g of ether-containing diamine containing 2 alkyl carbons, 100 g of triethylamine, and 20 g of Tween 80 into 4500 g of deionized water in sequence, and dissolve at room temperature to obtain an ether-containing diamine solution; 317 g of p-fluorobenzoyl chloride Mix it with 3500g of chlorobenzene evenly and add it into the container, then add the above prepared diamine solution containing ether dropwise into the container, after the diamine solution is added dropwise, continue to react for 5 hours at room temperature to generate Carbodiamide dihalogenated monomer; distill and recover the organic solvent in the above monomer, collect the viscous crude product, wash 4 times with water, remove the solvent, and dry at 100°C for 12 hours to obtain purified carbon dihalide containing 2 alkyl Amide difluorinated monomer, the structural formula is as follows (NMR such...

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Abstract

The invention relates to a fluorine-containing terminal group active hydroxyl friction-resistant high-shear-resistant composite rubber material, and belongs to the field of friction-resistant materials. The invention provides a friction-resistant and high-shear-resistant composite rubber material. The friction-resistant and high-shear-resistant composite rubber material comprises the following raw materials in parts by weight: 0.1-10 parts of fluorine-containing terminal group active hydroxyl friction-resistant active surface modified resin and 50-90 parts of semi-vulcanized rubber, the structural formula of the fluorine-containing terminal group active hydroxyl friction-resistant active surface modified resin is as shown in formula I, m is more than 0 and less than or equal to 200, n is more than 0 and less than or equal to 200, and M is any one of perfluorohexyl sulfonyl, perfluorohexyl, perfluorohexyl sulfonyl, perfluorooctyl sulfonyl or perfluorooctyl. According to the invention, high-performance semi-aromatic polyether amide containing a fluorine-containing end group and an active hydroxyl grafting group is prepared, and the semi-aromatic polyether amide and traditional rubber are subjected to coating compounding by utilizing the excellent comprehensive performance of the semi-aromatic polyether amide, so that the friction performance of a rubber sealing element is improved.

Description

technical field [0001] The invention relates to a friction-resistant and high-shear-resistant composite rubber material containing fluorine-containing terminal active hydroxyl groups, which belongs to the field of friction-resistant materials. Background technique [0002] For dynamic seals, friction is an important factor related to the quality of motion, and seals and friction always restrict each other. Generally speaking, improving the sealing performance will increase the friction force, which will directly lead to the reduction of motion ability and quality; and the friction force will accelerate the wear of the seal. [0003] At present, most of the general-purpose engine seals are made of ethylene-propylene rubber or nitrile rubber, etc., but as a kind of seal material, its friction performance still needs to be further improved. Compared with rubber, plastics generally have a lower coefficient of friction, better barrier properties, and higher strength and hardness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J7/12C08G65/48C08G65/40C08L21/00
CPCC08J7/0427C08J7/123C08G65/4031C08G65/485C08J2471/12C08J2321/00
Inventor 张刚文言泽李洪春李东升雷征黄骁严光明杨杰严永刚
Owner SICHUAN UNIV
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