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

A technology of benzothiazole and sulfenamide, which is applied in the direction of organic chemistry, etc., can solve the problems of poor scorch resistance and increased production cost.

Active Publication Date: 2004-09-15
SHANDONG YANGGU HUATAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 CTP must be increased during use, which increases the production cost

Method used

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

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Embodiment Construction

[0012] N-tert-butyl-bis(benzothiazole)sulfenamide of the present invention has passed small-scale test,

[0013] In a small test: take NS and maleic anhydride in a ratio of 1:0.5mol;

[0014] It is carried out according to the following steps:

[0015] (1), take the raw materials NS and maleic anhydride, add them to the synthesis reaction ax in the ratio of 1:0.5mol and stir, add 120 # Solvent oil, heated up to 90°C, reacted for 40 minutes;

[0016] (2) The above-mentioned synthetic raw materials are cooled to room temperature, neutralized to neutral with 5% aqueous sodium hydroxide solution, washed with water, filtered, dried, pulverized, and packaged as a finished product.

[0017] The small-scale test product of N-tert-butyl-bis(benzothiazole)sulfenamide TBSI of the present invention has been tested by the State Key Laboratory of Metal Matrix Composite Materials of Shanghai Jiaotong University, and the test items are: characteristic curve of vulcanizer, hardness, tensile ...

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Abstract

The invention belongs to a rubber vulcanization promoter, relating to an N-tert.-butyl- 2(benzothiazyl) sulfonamide (NBBS), its character: it is prepared of NS with phthalic anhydride or maleic anhydride in the proportion of 1 to 0.5-0.55, and its steps: (1) proportionally taking raw material to add in the synthesis reaction kettle to stir, adding in solvent 2-3 times as big as material volume, where the solvent is carbon tetrachloride, toluene or solvent oil 120, raising the temperature to 95 minus or plus 5 deg.C and reacting for 30-60 minutes; (2) cooling to room temperature, using 5% NaOH solution to neutralize to neutral solution, then washing by water and filtering, drying, crushing and packaging the finished product. The detection result shows that: at the same curing temperature of 160 deg.C, TBSI sulfuration inducing period and torque are both between NS's and DZ's, but TBSI keeps the best sulfuration smoothness in long time, and TBSI anti-reversion characteristic is better than NS's and DZ's and the physical mechanical performance test result shows that TBSI physical property is the same to NS's and DZ's.

Description

technical field [0001] The invention belongs to a rubber vulcanization accelerator, and relates to an N-tert-butyl-bis(benzothiazole)sulfenamide and a production process thereof. Background technique [0002] At present, domestic rubber vulcanization accelerators traditionally use sulfenamide vulcanization accelerators, the most representative products of which are N-morpholino-2-benzothiazole sulfenamide (NOBS), N-dicyclohexyl -2-benzothiazole sulfenamide (DZ), N-tert-butyl-2-benzothiazole sulfenamide, the amount of NOBS in use is relatively large, but there are secondary amine sulfenamide vulcanization accelerators such as NOBS : It can produce serious carcinogens-nitrosamines when heated, so it has been banned in some countries and replaced by primary amine sulfenamide vulcanization accelerator NS. 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 CTP must be increased during use, which increases the pro...

Claims

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Application Information

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IPC IPC(8): C07D417/12
Inventor 白蒙
Owner SHANDONG YANGGU HUATAI CHEM
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