A kind of agglomeration process of nitrile rubber latex

A technology of nitrile rubber and latex, which is applied in the field of coagulation process of nitrile rubber latex, can solve the problems of increased production cost, fine particles of nitrile rubber latex, long coagulation time, etc., and achieves the effect of reducing production cost
CN103724460BActive Publication Date: 2016-03-02CHINA PETROLEUM & CHEM CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2016-03-02

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Abstract

The invention relates to a nitrile butadiene rubber latex coagulation technology, and belongs to the treatment of a rubber latex characterized by a used coagulation agent. The technology is characterized in that polyepichlorohydrin dimethylamine is adopted as a coagulation agent, an aqueous solution of sodium chloride is adopted as a coagulation mother liquor, and sulfuric acid is adopted as a pH adjusting agent, and the technology comprises the following steps: 1, preparing the coagulation mother liquor, 2, preparing a solution of the coagulation agent, 3, preheating a nitrile butadiene rubber latex, 4, preparing a pH adjusting solution, and 5, coagulating the latex. The nitrile butadiene rubber latex coagulation technology has the advantages of coarse colloidal particles in the coagulation process, small crushed colloid loss, less consumption of the coagulation agent, small consumption of the pH adjusting agent, low COD index in discharged wastewater, simple use, short coagulation time and low production cost. The COD content in wastewater is 266.48mg / L, and accounts of 40% of the COD content in the prior art.
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Description

technical field

[0001] The invention relates to a coagulation process of nitrile rubber latex. Belongs to the treatment of rubber latex characterized by the coagulant used. Background technique

[0002] Nitrile rubber (NBR) is obtained by emulsion polymerization of two monomers, butadiene and acrylonitrile. Because its molecular chain contains unsaturated double bonds and polar groups -CN, it has good oil resistance and physical With excellent mechanical properties, it has been widely used in various oil-resistant rubber products, and has broad prospects for development and utilization.

[0003] In the production process of nitrile rubber, after the emulsion polymerization is completed, the unreacted raw materials are removed by degassing, and then enter the coagulation unit, and a coagulant is added in the coagulation kettle for coagulation, and then, it is washed with alkali, dehydrated and dried to obtain butyl rubber. Sunny rubber products.

[0004] In the post-coagul...

Claims

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