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High-performance, low-pollution and recovering metal ligand cross-linked nitrile rubber materials

A nitrile rubber and metal coordination technology, which is applied in the field of nitrile rubber materials, can solve the problems of less single use, etc., and achieve the effects of excellent oil resistance, good mechanical properties, good adhesive properties and reproducibility

Inactive Publication Date: 2005-02-23
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, metal oxides (such as zinc oxide) and rubbers containing active hydrogen (such as carboxylated nitrile) are also used for crosslinking: first, the metal oxide reacts with the acid, and then is combined into an ionic type through the electrostatic interaction of cations and anions. Rubber (Ionic elastomer), but this method is rarely used alone, and most of them are used in conjunction with existing covalent bond crosslinking systems (Chen Zhaohui, Wang Dizhen, Luo Dongshan, Zheng Ritu, Synthetic Rubber Industry, 2003, 23 (2 ), 107-110)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Acrylonitrile content is 27wt%, the Mooney viscosity is 100 parts of the nitrile rubber of 80, copper sulfate 34 parts, mixes evenly on the two-roll mill, then on the plate vulcanizing machine at 180 ℃, under the pressure of 10Mpa hot press cross-linking Available in 20 minutes. Coordination crosslinked nitrile rubber has a tensile strength of 30.3Mpa, an elongation at break of 450%, a hardness (Shore A) of 90, a tear strength of 85kN / m, and oil resistance (100°C, 72h, %, 1# oil / 3# oil): 3.42 / 4.81 (better than traditional vulcanized NBR), the bonding strength with metal> 5.6Mpa.

Embodiment 2

[0020] Acrylonitrile content is 50wt%, the Mooney viscosity is 100 parts of the nitrile rubber of 100, copper sulfate 15 parts, plasticizer DOP 10 parts, mix uniformly on the double-roller mill, at 180 ℃, hot pressing under the pressure of 10Mpa Available in 15 minutes. The tensile strength of the obtained material was 22.4 MPa, and the elongation at break was 700%.

Embodiment 3

[0022] Acrylonitrile content is 40wt%, the Mooney viscosity is 100 parts of the nitrile rubber of 70, copper sulfate 15 parts, liquid nitrile 10 parts, mix on the double-roller mill evenly, at 190 ℃, under the pressure of 10Mpa hot press cross-linking It can be obtained in 15 minutes, the tensile strength reaches 32.5Mpa, and the elongation at break is about 450%.

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PUM

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Abstract

High performance, low pollution and regenerated metal coordinative cross linked acrylonitrile-butadiene rubber comprises acrylic nitrile 18 - 50wt%, acrylonitrile-butadiene rubber with Mooney viscosity of 20 - 100, liquid butyronitrile, carboxylic butyronitrile, hydrogenated butyronitrile, powdery butylonitrile, a butyronitrile contained mixture or / and nitrile containing copolymer or grafts and halides of transition metals or / and oxygen containing salts, and is obtained by cross reacting at 200deg.C for 5 - 60minutes. Its advantages include no harmful materials used in production, good mechanical performance without carbon black added, oil-resistant, good adhesion with metals and regenerating ability.

Description

technical field [0001] The invention relates to a nitrile rubber material, in particular to a nitrile rubber material formed by coordination and crosslinking of metal ions and nitrile groups in nitrile rubber. Background technique [0002] When rubber is used as a material, the linear polymer is cross-linked into a three-dimensional network polymer by means of covalent bond cross-linking such as vulcanization, and a large amount of inorganic substances such as carbon black and various organic additives are added at the same time. Cross-linked rubber is a non-melting, insoluble substance that is difficult to recycle. In addition, the heterocyclic compounds of vulcanization accelerators necessary for cross-linking are mostly carcinogens, which seriously affect people's health; and carbon black, which is used as a rubber reinforcement material, is easily scattered during use and pollutes the environment. Therefore, making rubber a renewable and environmentally friendly high-pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/12C08L9/02
Inventor 李慧吴驰飞张喜亮袁晓芳黄剑锋沈飞肖方一
Owner EAST CHINA UNIV OF SCI & TECH
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