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N-teriary-butyl-2 (benzothiazyl) sulfenamide and production process thereof

A technology of benzothiazole sulfenamide and benzothiazole is applied in the field of N-tert-butyl-bissulfenamide and its production technology, and can solve the problems of poor scorch resistance, increased production cost and the like

Inactive Publication Date: 2006-05-24
SHANDONG YANGGU HUATAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the scorch resistance of NS is not as good as that of NOBS and DZ, so the amount of DZ and anti-scorch agent N-cyclohexylthiophthalimide (CTP) must be increased during use, which increases the production cost

Method used

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  • N-teriary-butyl-2 (benzothiazyl) sulfenamide and production process thereof
  • N-teriary-butyl-2 (benzothiazyl) sulfenamide and production process thereof

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Embodiment Construction

[0011] The N-tert-butyl-bis(benzothiazole) sulfenamide of the present invention has passed a small test,

[0012] In a small-scale test: prepare tert-butyl-2-benzothiazole sulfenamide and maleic anhydride in a ratio of 1:0.5mol;

[0013] It is carried out according to the following steps:

[0014] (1) Take the raw materials tert-butyl-2-benzothiazole sulfenamide and maleic anhydride, add them to the synthesis reaction axe at a ratio of 1:0.5 mol, and add 120 in the volume of the material twice. # Solvent oil, heat up to 90°C, react for 40 minutes;

[0015] (2) Cooling the above synthetic raw materials to room temperature, neutralizing them with 5% sodium hydroxide aqueous solution to neutrality, washing, filtering, drying, pulverizing, and packaging the finished product.

[0016] The N-tert-butyl-bis(benzothiazole) sulfenamide TBSI of the present invention is a small-scale test product tested by the State Key Laboratory of Metal Matrix Composites of Shanghai Jiaotong University. I...

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Abstract

The present invention belongs to rubber vulcanization accelerator, relates to a kind of N-tert-butyl-bis(benzothiazole) sulfenamide, it is characterized in that: (1), is made of tert-butyl-2-benzothiazole sulfenamide and Phthalic anhydride or maleic anhydride is added to the synthesis reaction kettle at a ratio of 1:0.5~0.55mol and stirred, and a solvent of 2~3 times the volume of the material is added, and the solvent is selected from carbon tetrachloride, toluene or 120 # Solvent oil, heat up to 90±5°C, react for 30-60 minutes; (2), cool the above-mentioned synthetic raw materials to room temperature, neutralize them with 5% sodium hydroxide aqueous solution, wash with water, filter, dry, pulverize, and the finished product Package. The test results of the present invention show that: at the same vulcanization temperature of 160°C, the vulcanization induction period and vulcanization torque of TBSI are between NS and DZ, but TBSI maintains the best vulcanization flatness and anti-vulcanization in a long time range. The reversion property is better than that of NS and DZ. According to the test results of physical and mechanical properties, the physical properties of TBSI are basically the same as those of NS and DZ.

Description

Technical field [0001] The invention belongs to a rubber vulcanization accelerator, and relates to a N-tert-butyl-bis(benzothiazole) sulfenamide and a production process thereof. Background technique [0002] At present, sulfenamide vulcanization accelerators are traditionally used in domestic rubber vulcanization accelerators. Among them, the most representative products are N-morpholin-2-benzothiazole sulfenamide (NOBS) and N-bicyclic sulfenamide (NOBS). 2-benzothiazole sulfenamide (DZ), N-tert-butyl-2-benzothiazole sulfenamide (NS), the amount of NOBS in use is larger, but NOBS and other secondary amine sulfenamides Vulcanization accelerators exist: they can produce serious carcinogens-nitrosamines when heated, so it has been banned in some countries and replaced by primary amine sulfenamide vulcanization accelerators NS. However, the scorch resistance of NS is not as good as that of NOBS and DZ. Therefore, the amount of DZ and the scorch inhibitor N-cyclohexylthiophthalimide ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D417/12
Inventor 白蒙
Owner SHANDONG YANGGU HUATAI CHEM
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