Hydrogenation method for organic catalyst normal-pressure catalytic butyronitrile rubber latex

A technology for catalyzing nitrile and organic catalysts at atmospheric pressure, which is applied in the field of in-situ hydrogenation of nitrile latex at atmospheric pressure, which can solve problems such as affecting performance and difficult removal, achieve stable chemical properties, save reaction raw materials, and reduce costs Effect
CN102827309BActive Publication Date: 2014-04-16BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2014-04-16

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Abstract

The invention provides a hydrogenation method for organic catalyst normal-pressure catalytic butyronitrile rubber latex, belonging to the field of the in-situ normal-pressure hydrogenation of the butyronitrile rubber latex. The invention provides a novel method for carrying out the hydrogenation research on the macromolecule butyronitrile rubber latex by a hydrazine hydrate / riboflavin catalyst system under the air condition, and developing the in-situ hydrogenation of the green organic compounds--riboflavin catalyst on the butyronitrile rubber latex, wherein the riboflavin catalyst is firstly used in an aqueous dispersion rubber latex system. Compared with the existing inorganic catalyst such as the copper sulfate, the ferric sulfate, the ferrous sulfate or the boric acid, the riboflavin organic catalyst has the advantages that the riboflavin organic catalyst is green and environment-friendly, and is easy to prepare, the latex can not be broken, the stability of the butyronitrile rubber latex can not be influenced due to the stable existence of the riboflavin organic catalyst and the rubber latex and the like, furthermore, a hydrogenated intermediate generated by a hydrazine hydrate / riboflavin catalyst system is stable, so that the hydrogenated butyronitrile rubber latex of which the hydrogenation degree is larger than 90% can be obtained.
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Description

technical field

[0001] The invention belongs to the field of in-situ normal pressure hydrogenation of nitrile latex, and selectively hydrogenates carbon-carbon double bonds in the molecular chain of nitrile rubber in the presence of a riboflavin catalyst. Background technique

[0002] The molecular chain of nitrile rubber contains a large number of unsaturated carbon-carbon double bonds, which makes its chemical properties more active, resulting in poor ozone resistance and heat resistance, thus limiting the scope of use of nitrile rubber. Hydrogenated nitrile rubber is obtained by selective hydrogenation of carbon-carbon double bonds through hydrogenation reaction. Hydrogenated nitrile rubber not only maintains the good oil resistance and solvent resistance of nitrile rubber, but also improves its heat resistance , aging resistance, and oxygen resistance, thereby prolonging the service life of rubber products, meeting the requirements of special fields, and expanding the ap...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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