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Preparation method of rubber peptizer 2,2'-di(5-bromo-pyridine-2-formamido) diphenyl disulfide

A technology of diaminodiphenyl disulfide and rubber peptizer, applied in the direction of organic chemistry and the like, can solve the problems such as synthesis and performance of dipyridine substituted diphenyl disulfide compounds that have not been reported in literature, and achieves lowering temperature, improving The effect of rubber viscosity and fluidity improvement

Inactive Publication Date: 2017-05-10
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no literature report on the synthesis and performance of bispyridine substituted diphenyl disulfide compounds

Method used

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  • Preparation method of rubber peptizer 2,2'-di(5-bromo-pyridine-2-formamido) diphenyl disulfide
  • Preparation method of rubber peptizer 2,2'-di(5-bromo-pyridine-2-formamido) diphenyl disulfide
  • Preparation method of rubber peptizer 2,2'-di(5-bromo-pyridine-2-formamido) diphenyl disulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 1.0mmol 2,2'-diaminodiphenyl disulfide and 10mL methanol to the reaction flask, stir on a magnetic stirrer, add 0.1mmol dicyclohexylcarbodiimide, dropwise add 2.0mmol 5-bromo-pyridine- The methanol solution of 2-formic acid immediately produced a yellow precipitate, reacted for 10 hours, filtered with suction, dried, and the yield was 72%. Melting point: 192-194°C

Embodiment 2

[0025] Add 1.0mmol 2,2'-diaminodiphenyl disulfide and 10mL methanol to the reaction flask, stir on a magnetic stirrer, add 0.2mmol dicyclohexylcarbodiimide, dropwise add 2.0mmol 5-bromo-pyridine- The methanol solution of 2-formic acid immediately produced a yellow precipitate, reacted for 10 hours, filtered with suction, dried, and the yield was 76%. Melting point: 192-194°C

Embodiment 3

[0027] Add 1.0mmol 2,2'-diaminodiphenyl disulfide and 10mL methanol to the reaction flask, stir on a magnetic stirrer, add 0.2mmol dicyclohexylcarbodiimide, dropwise add 2.1mmol 5-bromo-pyridine- The methanol solution of 2-formic acid immediately produced a yellow precipitate, reacted for 10 hours, filtered with suction, dried, and the yield was 79%. Melting point: 192-194°C

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Abstract

The invention discloses a preparation method of rubber peptizer 2,2'-di(5-bromo-pyridine-2-formamido)diphenyl disulfide. The method comprises the steps that 2,2'-diamino disulfide diphenyl, dicyclohexyl carbodiimide and methyl alcohol are put in a round-bottom flask, stirring begins, a methanol solution of 5-bromo-pyridine-2-formic acid is slowly and dropwise added, and the reaction time is 10-20 hours; after reaction is completed, and filtration, washing and drying are performed to obtain a product, wherein the Mooney viscosity value of plasticated rubber of the peptizer is 58.0. The method is simple in reaction process, the obtained product is high in purity, and post-treatment is simple.

Description

technical field [0001] The present invention relates to a preparation method of bispyridine carboxamide diphenyl disulfide compound, in particular to the preparation of 2,2'-bis(5-bromo-pyridine-2-carboxamido)diphenyl disulfide compound The method belongs to the technical field of chemical additives. Background technique [0002] Rubber mastication is the only way to process natural rubber. The mastication process depends on the strong mechanical shear force of internal mixer and open mill to break the rubber molecular chain, thereby improving the plasticity of raw rubber. Therefore, rubber mastication Is the basis of rubber processing steps. Rubber mastication consumes a lot of energy, labor and time. Therefore, shortening the mastication time is an important link to improve production efficiency, and adding chemical rubber peptizers is an effective and simple way to save energy and time. It can The breaking of molecules is accelerated by chemical action, which significan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D213/81C08K5/378C08L7/00
CPCC07D213/81C08K5/378C08L7/00
Inventor 黄现强宋莹莹张灿灿薛泽春赫庆鹏
Owner LIAOCHENG UNIV
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