Novel method for crosslinking acrylonitrile butadiene by supported transient metal

A transition metal and nitrile rubber technology, applied in the field of cross-linked nitrile rubber, can solve the problems of material properties, uncoordinated metal salts, and low coordination efficiency, and achieve stable performance, excellent mechanical properties, and coordination efficiency. added effect

Inactive Publication Date: 2009-07-22
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0004] However, the disadvantage of this method is that the added metal salt exists in the form of particles in the system, the particle size is generally 0.5 to 1 micron, and the specific surface area is small, and the coordination crosslinking occurs on the particle surface, so the coordination efficiency Relatively low, a large amount of metal salt needs to be added to achieve a good cross-linking effect; in addition, a large amount of metal salt inside the particle is not coordinated. When encountering water, the metal salt particle can be dissolved and extracted by water, which has a negative impact on the material properties. great influence

Method used

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  • Novel method for crosslinking acrylonitrile butadiene by supported transient metal
  • Novel method for crosslinking acrylonitrile butadiene by supported transient metal
  • Novel method for crosslinking acrylonitrile butadiene by supported transient metal

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Dissolve 2 grams of anhydrous copper sulfate in 300 mL of water, then add the resulting solution into 20 grams of carbon black N220 under stirring, impregnate for 48 hours, and then slowly evaporate the water to dryness under stirring to obtain a loaded sample. At this time, the surface of the sample and No white or blue copper salt particles appeared on the container wall. The loaded samples were dried at 160°C for 24 hours. Then it was mixed evenly with 40 grams of nitrile rubber (DN003, with acrylonitrile content of 50%, Mooney viscosity of 78) on a two-roll mill, and then hot pressed at 180° C. for 20 minutes to prepare a sample. Meanwhile, a comparative sample was also prepared. The process was to mix 2 grams of anhydrous copper sulfate with 20 grams of carbon black and 40 grams of nitrile rubber DN003, and then hot press at 180° C. for 20 minutes to prepare a comparative sample.

[0024] The SEM photos of the sample of this embodiment and the sample of comparativ...

Embodiment 2

[0029] Dissolve 2 grams of anhydrous copper sulfate in 400 mL of water, then add the resulting solution to 20 grams of fumed silica (with a particle size of 20 to 50 nanometers) under stirring, soak for 48 hours, and then slowly distill the water under stirring. Dry to obtain loaded samples. The loaded samples were dried at 160°C for 24 hours. Then it was mixed evenly with 40 grams of nitrile rubber (DN003, with acrylonitrile content of 50%, Mooney viscosity of 78) on a two-roll mill, and then hot pressed at 180° C. for 20 minutes to prepare a sample. Except for the loading process, comparative samples were prepared according to the same raw material ratio and the same processing conditions.

[0030] The crosslink density of the obtained sample was 1.07×10 4 (mol / cm 3 ), while the comparative sample is only 0.71×10 4 (mol / cm 3 ); The tensile strength of the obtained sample is 21.1MPa, obviously better than 16.6MPa of the comparative example sample.

Embodiment 3

[0032] Dissolve 2 grams of cobalt chloride in 300 mL of water, then add the resulting solution into 20 grams of carbon black N330 under stirring, impregnate for 48 hours, and slowly evaporate the water to dryness under stirring to obtain a loaded sample. The loaded samples were dried at 160°C for 24 hours. Then it was mixed evenly with 40 grams of nitrile rubber (acrylonitrile content is 45%, Mooney viscosity is 67) on a two-roll mill, and then hot-pressed at 180° C. for 20 minutes to prepare a sample. Except for the loading process, comparative samples were prepared according to the same raw material ratio and the same processing conditions.

[0033] The crosslink density of the obtained sample was 0.68×10 4 (mol / cm 3 ), while the comparative sample is only 0.20×10 4 (mol / cm 3 ). The tensile strength of the example sample is 23.5MPa, which is better than 20.4Mpa of the comparative example sample.

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Abstract

The invention relates to a new method for crosslinking acrylonitrile-butadiene rubber by loaded transition metal; the method takes rubber reinforcing filling material with nanometer size such as carbon black and silicon dioxide as a carrier, and loads transition metal salts with the content of 0.1-20wt% in a form of impregnation; after being dried, the transition metal salts are co-mixed with the acrylonitrile-butadiene rubber in accordance with a certain proportion; and the acrylonitrile-butadiene rubber is prepared by crosslinking for 5-30 minutes at 140-200 DEG C. The crosslinked acrylonitrile-butadiene rubber uses the coordination of the transition metal salts with the nitrile base in the acrylonitrile-butadiene rubber for realizing crosslinking, and has better mechanical property than the existing vulcanized reinforced acrylonitrile-butadiene rubber and better oil resistance property.

Description

technical field [0001] The present invention relates to a kind of new method of cross-linked nitrile rubber, specifically, relate to loading transition metal salt on the surface of nano-reinforcing filler and then blending it with nitrile rubber and processing and forming to prepare cross-linked nitrile rubber method. Background technique [0002] When rubber is used as a material, the most common method is to cross-link linear polymers into three-dimensional network polymers by vulcanization and other covalent bond cross-linking methods, and at the same time add carbon black as a reinforcing filler. In addition to some known covalent bond crosslinking systems, people are also exploring the use of non-covalent bonds for rubber crosslinking. For example, Chino Keisuke et al. (Journal of Japan Rubber Association, 2002, 75, 482) tried to use hydrogen bonds to crosslink rubber materials. In addition, metal oxides (such as zinc oxide) and rubbers containing active hydrogen (such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08L9/02C08K3/24
Inventor 李慧李燕王为民范羽徐于娇崔佳佳韩哲文
Owner EAST CHINA UNIV OF SCI & TECH
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