2 Mercaptobenzothiazole (MBT) Uses
2 mercaptobenzothiazole (MBT) is an important variety of thiazole rubber vulcanization accelerators. At the same time, it is also an important auxiliary agent for oxidation and corrosion resistance.
2-MBT is a pale yellow powder or granule. It has an unpleasant smell. The melting point is above 173.0 °C. The relative density is 1.41 to 1.48. 2-mercaptobenzothiazole is poorly soluble in water and n-hexane. It is easily soluble in acetone. And soluble in ethanol. Slightly soluble in benzene.
2 mercaptobenzothiazole (MBT) is acidic. Vulcanization promotes strong. The vulcanization curve is relatively flat. Less polluting.
2-Mercaptobenzothiazole is a general-purpose vulcanization accelerator and is widely used in various rubbers. It has a vulcanization-promoting effect on natural rubber and synthetic rubber which is usually vulcanized with sulfur.
However, activation of zinc oxide, fatty acid, etc. is required before use. 2-Mercaptobenzothiazole is often used in combination with other accelerator systems.
For example, in combination with dithiothiuram and bismuth dithiocarbamate, it can be used as a vulcanization accelerator for butyl rubber.
It can be used together with tribasic cis-butyl succinate for use in light-colored, water-resistant chlorosulfonated polyethylene compounds.
It is often used in combination with dithiocarbamate in latex. When used in combination with diethyldithiocarbamate diethylamine, it can be vulcanized at room temperature.
2 mercaptobenzothiazole (MBT) is easily dispersed and not contaminated in rubber. However, due to its bitter taste, it is not suitable for rubber products that come into contact with food.
The dye S-GL (C.I. Disperse Red 121) was prepared by refluxing 2-mercaptobenzothiazole with 1-amino-4-nitroindole and potassium carbonate in dimethylformamide for 3 h.
This dye is used for the dyeing of polyester and its blended fabrics.
When 2 mercaptobenzothiazole (MBT) is used as an electroplating additive, it is also called an acid copper plating brightener. It is used as a paving brightener when bright copper plating with copper sulfate as the main salt.
Mainly used as a brightener for bright copper sulfate. Has a good leveling effect. The general dosage is 0.05~0.10 g/L. It can also be used as a brightener for cyanide silver plating. After adding 0.5 g/L, the cathode polarization was increased. Thereby, the silver ion crystals are aligned to form a bright silver plating layer.
In addition, 2 mercaptobenzothiazole (MBT) is also used in the preparation of pesticide fungicides, nitrogen fertilizer synergists, cut-off oils and lubricant additives, organic anti-ashing agents in photographic chemistry, metal corrosion inhibitors, and the like.
In addition, 2 mercaptobenzothiazole (MBT) is also a reagent for chemical analysis. The product is low in toxicity and has a stimulating effect on skin and mucous membranes.
This product is one of the effective corrosion inhibitors for copper or copper alloys. When the cooling system contains copper equipment and the raw water contains a certain amount of copper ions, 2-mercaptobenzothiazole can be added. It can prevent corrosion of copper.
2-Mercaptobenzothiazole is an intermediate of the herbicide mefenacet and is also a rubber accelerator and an intermediate thereof.