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Novel fluororubber vulcanizer and preparation method thereof

A vulcanizing agent and fluororubber technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of aminohydroxy compounds, etc., to achieve the effects of high strength, mild reaction conditions and simple preparation methods

Active Publication Date: 2015-06-03
江苏千富之丰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the object of the present invention is to use a novel monophenolic amine structural substance as a vulcanizing agent, together with a necessary quaternary phosphorus accelerator, so that the obtained fluororubber has reliable thermal tearing, high strength, Compression set performance and stable heat resistance, at the same time, it can make the fluidity of the fluororubber composition better, and the processing technology is more excellent, avoiding the scorch problem in the phenolic vulcanization system and the performance of the fluororubber in the amine vulcanization system Poor and other issues

Method used

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  • Novel fluororubber vulcanizer and preparation method thereof
  • Novel fluororubber vulcanizer and preparation method thereof
  • Novel fluororubber vulcanizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A novel fluorine rubber vulcanizing agent, the structural formula of the vulcanizing agent is as follows:

[0026]

[0027] Above-mentioned structural formula belongs to general formula I, wherein R 1 =C 6 h 12 N H 2 .

[0028] The raw material for the preparation of the above vulcanizing agent is: p-(1-nitrohexyl)phenol. The specific preparation method is as follows: add a certain amount of p-(1-nitrohexyl)phenol in the reaction kettle, add a metal catalyst such as iron powder, then add an appropriate amount of hydrochloric acid, and carry out hydrogenation reduction reaction with hydrogen gas, and control the reaction temperature. 30-40°C, the pressure in the reactor is controlled between 0.4-0.6MPa, react overnight to fully reduce the nitro group to amino group, and the above product can be obtained with a yield of 92%. Number is 1 # .

[0029] The above reaction equation is as follows:

[0030]

Embodiment 2

[0032] A novel fluorine rubber vulcanizing agent, the structural formula of the vulcanizing agent is as follows:

[0033]

[0034] Above-mentioned structural formula belongs to general formula I, wherein R 1 =C 6 h 15 ON 2 .

[0035] The raw materials for the above vulcanizing agent are: p-hydroxybenzoic acid and 1,6-hexamethylenediamine. The specific preparation method is as follows: add an appropriate amount of solvent (such as toluene, etc.) The reaction was carried out under reflux for 4.5 hours. During the reflux process, a water separator was used to divide the water. After the reaction, the solvent was removed in a vacuum. Number is 2 # .

[0036] The above reaction equation is as follows:

[0037]

Embodiment 3

[0039] A novel fluorine rubber vulcanizing agent, the structural formula of the vulcanizing agent is as follows:

[0040]

[0041] Above-mentioned structural formula belongs to general formula I, wherein R 1 =C 25 h 29 ON 2 .

[0042] The raw materials for the preparation of the vulcanizing agent are: p-hydroxybenzoic acid and N,N-dicinnamyl-1,6-hexanediamine. The specific preparation method is as follows: add an appropriate amount of solvent (such as toluene, etc.) -1,6-Hexamethylenediamine, reflux reaction for 5 hours, during the reflux process, use a water separator to separate the water. After the reaction, remove the solvent in a vacuum. After the product is cooled, it can be crushed. The yield of the above product is 92%. Number is 3 # .

[0043] The above reaction equation is as follows:

[0044]

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Abstract

The invention discloses a novel fluororubber vulcanizer which comprises at least one phenolic hydroxyl group and one amino group in the molecular structure. The novel fluororubber vulcanizer can be prepared from the following two preparation methods: one method comprises a step of performing catalytic hydrogenation reduction on a phenolic hydroxyl group and nitroparaffin substituted aromatic hydrocarbon, and the other method comprises a step of reacting phenolic hydroxyl substituted aromatic hydrocarbon carboxylic acid and a multi-amino compound. The novel fluororubber vulcanizer disclosed by the invention is simple in preparation method, gentle in reaction condition and relatively low in raw material cost; when being added with an essential quaternary phosphorus salt accelerant, the novel fluororubber vulcanizer can be used as a special vulcanizer, prepared fluororubber is reliable in heat tearing property, high in strength, good in permanent compression deformation property and stable in heat resistance, a fluororubber composition is relative good in flowability and relatively excellent in processing property, and problems such as scorching of a phenol vulcanization system and poor fluororubber property of an amino vulcanization system can be solved.

Description

technical field [0001] The invention relates to a novel fluorine rubber vulcanizing agent and a preparation method thereof, belonging to the technical field of rubber vulcanization aids. Background technique [0002] Fluorine rubber refers to a high molecular elastomer with fluorine atoms attached to the carbon atoms of the main chain or side chain of the molecule. In the molecular structure of fluorine rubber, the bond energy of the C-F bond (435-485kJ / mol) is large, and the covalent radius of the fluorine atom (0.064nm) is equivalent to half of the bond length of the C-C bond, and the C-C chain segment is well protected by the fluorine atom Therefore, fluorine rubber has a high degree of chemical stability and thermal stability, and is currently the best medium-resistant property among all elastomers, and can be widely used in aerospace, automobiles, machinery, petrochemicals, etc. [0003] Fluorine rubber, like other rubbers, needs to be processed by cross-linking means ...

Claims

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Application Information

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IPC IPC(8): C08K5/17C08K5/20C08K5/29C08L27/12C07C215/54C07C213/02C07C231/02C07C235/50
Inventor 李先文沈嘉张目蕾
Owner 江苏千富之丰科技有限公司
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