Method for preparing mercaptosilicane coupling agent with low VOC (volatile organic compounds) emission

A technology of mercaptosilane coupling agent and chloropropyltrichlorosilane, which is applied in the field of preparation of mercaptosilane coupling agent, can solve the problems of large waste water discharge, scorched rubber material, and increased porosity of rubber, and achieve product High quality, low cost, and the effect of reducing viscosity
CN104558010AActive Publication Date: 2015-04-29JINGZHOU JIANGHAN FINE CHEM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JINGZHOU JIANGHAN FINE CHEM
Publication Date
2015-04-29

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Abstract

The invention relates to a method for preparing a mercaptosilicane coupling agent with low VOC (volatile organic compounds) emission, and belongs to the field of organic chemistry. The method comprises the steps of performing primary esterification on alkyl polyether alcohol and chloropropyl trichlorosilane under reduced pressure at a certain reaction temperature, and continuously removing the generated hydrogen chloride gas so that the esterification reaction is complete; then further adding ethanol for secondary esterification; and performing sulfhydrylation reaction, dissolving anhydrous sodium hydrosulfide into ethanol, and reacting the mixture with newly synthesized chloropropyl trialkoxysilane to obtain the mercaptosilicane coupling agent with low VOC emission. The product prepared by the method has high and stable quality, high yield and few impurities. Through use of the method, wastewater is not discharged, the environment is not polluted and industrialized production is facilitated. The silicon unit of the product only contains 33% of volatile ethoxy groups, so the decrement of VOC can reach over 80%, pollution discharge in the mixing process can be controlled, and the requirement for environment-friendly products can be met.
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Description

technical field

[0001] The invention relates to a preparation method of a mercaptosilane coupling agent with low VOC emission, belonging to the field of organic chemistry. Background technique

[0002] As early as the 1990s, with the improvement of people's requirements for tire performance, the silica-silane filling system was used in the tread rubber of car tires. After mixing with solution-polymerized styrene-butadiene rubber, this filling system can significantly improve the performance of tires. Performance of car tires. Among them, the epoch-making polysulfide functional organosilanes are mainly bis(triethoxysilylpropyl) tetrasulfide (TESPT, Si69) and bis(triethoxysilylpropyl) disulfide (TESPD, Si69) These two are products that, in addition to precipitated silica, can greatly improve wet road grip and reduce rolling resistance.

[0003] Although Si69 has been used for more than 30 years, Si75 has some advantages over Si69, but they also have many disadvantages in the...

Claims

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