Preparation method of acrylonitrile butadiene rubber

A technology of nitrile butadiene rubber and vinyl nitrile, which is applied in the field of preparation of highly stable nitrile butadiene rubber, can solve the problems of unfavorable large-scale production and troublesome operation, and achieve the effects of fast polymerization rate, improved stability and simple process
CN103450397BActive Publication Date: 2015-05-13PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2015-05-13

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Abstract

The invention relates to a preparation method of an acrylonitrile butadiene rubber. The method includes: adding a water solution of an emulsifier with a dosage of 75-85%, a dispersant, electrolyte, and a chelating agent, and a water solution of a reducing agent and an activating agent into a reaction kettle; mixing N-(p-anilinephenyl) unsaturated amide or imide and vinyl nitrile with a molecular weight regulator with a dosage of 70-85%, and adding the mixture into the reaction kettle; conducting vacuum pumping for 15-30min, then adding a deoxidant water solution, an aliphatic conjugated diene monomer of C4-C5, controlling the temperature to 5-8DEG C, adding an initiator solution to undergo reaction; when the reaction conversion rate reaches 30-50%, adding the remaining emulsifier, dispersant, electrolyte, and chelating agent into the kettle; adding the remaining molecular weight regulator into a polymerization kettle; when the conversion rate reaches 60-80%, terminating the process. The acrylonitrile butadiene rubber provided in the invention has a glass transition temperature ranging from -65DEG C to -10DEG C, and Mooney viscosity (ML1+4<100DEG C>) adjustable from 40 to 120.
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Description

technical field

[0001] The invention relates to a preparation method of highly stable nitrile rubber with excellent heat resistance and oxidation resistance. Background technique

[0002] Traditional anti-aging agents commonly used in the synthetic rubber industry are easily volatilized from rubber or extracted by oil and petroleum products during use, making rubber lose resistance to thermal oxygen. The anti-aging agent that can be chemically combined in the rubber chain can make the rubber have excellent properties, such as N-(4-anilinophenyl) methacrylamide is one of the effective reactive anti-aging agent monomers. Polymerized stabilized nitrile rubber (emulsion polymerization product of butadiene, acrylonitrile, polymerized anti-aging agent) uses a polymeric anti-aging agent that is an amine or phenolic compound with dual functions of anti-aging and polymerizing monomers. The main chain entering the diene rubber becomes a part of the polymer molecule, so the products o...

Claims

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