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Nucleocapsid type rubber coordination crosslinking agent

A coordination cross-linking, core-shell type technology, applied in the field of organic/inorganic core-shell type coordination cross-linking agents, can solve the problems of large copper sulfate, difficulty in obtaining strong rubber materials, and low coordination efficiency

Inactive Publication Date: 2008-07-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the above-mentioned coordination crosslinking mainly occurs on the surface of copper sulfate particles, the coordination efficiency is low, resulting in a large amount of copper sulfate to be added
In addition, while the rigidity of the system increases, the toughness decreases significantly, and it is difficult to obtain rubber materials with high strength and good toughness

Method used

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  • Nucleocapsid type rubber coordination crosslinking agent
  • Nucleocapsid type rubber coordination crosslinking agent
  • Nucleocapsid type rubber coordination crosslinking agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Materials used in this embodiment: nano-silicon oxide is selected for the inorganic particles, polymethacrylic acid (PMA) is selected for the shell polymer, and copper ions are used for the coordination metal ions introduced into the shell. The rubber matrix is ​​powdered nitrile rubber (NBR).

[0053] Firstly, burn the surface of nano-silicon oxide at 600-650°C for 4-5 hours to remove a small amount of organic impurities on the surface. Weigh 10g of the above treated powder, and disperse it in 300ml of toluene by ultrasonic vibration; pour 0.5g of silane coupling agent KH570 into a small beaker, drop about 20 drops of deionized water, stir at room temperature for 10min to make it hydrolyzed in advance . Pour the above pre-hydrolyzed KH570 into toluene at one time. Raise the temperature to boiling, fast mechanical stirring, reflux condensation, nitrogen protection, and the reaction ends after 4 hours.

[0054] Put 300ml of the above suspension under nitrogen protecti...

Embodiment 2

[0058] Materials used in this embodiment: nanometer zinc oxide is selected for the inorganic particles, polymethacrylic acid (PMA) is selected for the shell layer polymer, and copper ions are used for the coordination metal ions introduced into the shell layer. The rubber matrix is ​​ethylene-vinyl acetate copolymer (EVA).

[0059] Firstly, the surface of nano-zinc oxide is burnt at 600-650°C for 4-5 hours to remove a small amount of organic impurities on the surface. Weigh 10g of the above treated powder and disperse it in 400ml of toluene by ultrasonic vibration; pour 1.0g of silane coupling agent KH570 into a small beaker, drop about 25 drops of deionized water, stir at room temperature for 10min to make it hydrolyzed in advance . Pour the above pre-hydrolyzed KH570 into toluene at one time. Raise the temperature to boiling, fast mechanical stirring, reflux condensation, nitrogen protection, and the reaction ends after 6 hours.

[0060] Put 400ml of the above suspension ...

Embodiment 3

[0064] Materials used in this embodiment: the inorganic particles adopt ordinary light calcium carbonate (325 mesh, commercially available, produced by Zhejiang Jiande Tianshi Calcium Carbonate Co., Ltd.), the polymer shell adopts polymethacrylic acid, and the rubber matrix is ​​nitrile rubber , the coordination center ion is copper ion.

[0065] First, ultrasonically disperse 10.0g of ordinary light calcium carbonate in 300ml of isopropanol, slowly add aminosilane coupling agent N-(aminoethyl)-aminopropyltrimethoxysilane dropwise under stirring condition and heat up to 60°C React for 3 hours, filter and dry and extract with acetone for 24 hours to obtain calcium carbonate powder treated with coupling agent. Add 10g of calcium carbonate powder treated with a coupling agent, 1g of azodicyanovaleric acid and 50g of thionyl chloride into a three-necked flask, drop in 1g of α-picoline, stir at 30°C for 2 hours, and centrifuge to obtain The precipitate was washed several times wit...

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Abstract

The invention discloses a ligand cross-linking agent used in rubber, which is a cladding structure that a shell layer surrounds a core which consists of inorganic particles; the shell layer consists of organic high molecular polymer; a ligand center used for providing ligands is arranged on the organic high molecular polymer; the core is connected with the organic high molecular polymer by a covalent bond. The ligand center is transition metal ions and the inorganic particles are inorganic micron powder or inorganic nanoparticles. The core-shell ligand cross-linking agent can realize ligand cross linkage of nitrile rubber during hot-pressing process, which promotes the rigidity of the rubber as well as keeps good tenacity, thus substituting traditional sulfur carbon black reinforcing rubber cross linking system and obtaining rubber material that is not only reinforced but also rubbery.

Description

(1) Technical field [0001] The invention relates to a coordination crosslinking agent for core-shell rubber, in particular to an organic / inorganic core-shell coordination crosslinking agent. (2) Background technology [0002] Crosslinking is of great significance for improving the performance of rubber. Crosslinking through covalent bonds such as vulcanization is the main method of rubber crosslinking, which has the advantages of stable structure and mature technology. However, due to the stability and irreversibility of covalent bonds, it is difficult to recycle vulcanized rubber, which brings serious "black pollution" problems; at the same time, in order to obtain good mechanical and mechanical properties, the rubber vulcanization process often needs to be combined with carbon black reinforcement. Lead to poor processing environment. In order to solve the above problems, scholars at home and abroad have conducted a lot of research on the non-covalent bond crosslinking of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08K9/04C08L21/00C08J3/24
Inventor 张诚徐立新
Owner ZHEJIANG UNIV OF TECH
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