Preparation and application of 2-mercaptobenzothiazole zinc salt_Kain Industrial Additive

Background and overview^[1]

2-Mercaptobenzothiazole zinc salt is a high-speed vulcanization accelerator and does not have rubber dyeing properties. Suitable for NR, IR, BR, SBR, NBR, EPDM and latex. Used in latex systems with mild activity and usually used in combination with super accelerators. The critical temperature of vulcanization is high, it is difficult to produce early vulcanization, and the vulcanization flatness is wide. It is suitable for latex systems and has the function of adjusting the viscosity of the system. Suitable for injection molding and foam rubber products. Safe to operate, easy to disperse, no pollution, no discoloration. Resistant to aging when used in combination with TP. It is mainly used to manufacture industrial products such as tires, rubber hoses, rubber shoes, and tapes. Most of the existing production equipment is relatively complex. 2-Mercaptobenzothiazole zinc salt is used as a vulcanization accelerator. The quality of its production equipment is crucial to improving product quality and reducing by-products. content is of great economic significance.

Preparation^[2]

Add 30 mL of methanol into the electrolytic cell, add 0.5 g of 2-mercaptobenzothiazole with a purity of 98%, then add 0.1 g of conductive agent tetrabutylammonium bromide, stir and dissolve thoroughly under 35°C water bath heating conditions. The stirring speed of the electrolytic cell is 200 rpm, the anode is a metal zinc sheet, and the cathode is graphite. Direct current is passed through the reaction and the current during the reaction is adjusted to 60 mA. TLC tracks the reaction progress, and the electrolysis reaction continues until 2-mercaptobenzothiazole disappears in the electrolytic cell to obtain a suspension. Filter, and the filtrate obtained is returned to the electrolytic cell for continued use. The filter cake is washed with methanol (5mLx3) and dried to obtain a solid product, 2-mercaptobenzothiazole zinc salt, with a yield of 99.3%. X-ray powder diffraction of the sample shows that the interplanar spacing d=1.32999, 0.96207, 0.89702, 0.73719, 0.65067, 0.56519nm is attributed to the characteristic peak of bis-2-mercaptobenzothiazole zinc.

Apply^[3-4]

CN201610857277.5 discloses a low-temperature vulcanization accelerator for rubber products and a preparation method thereof. The accelerator includes the following raw materials in weight percentages: EPDM rubber 10-14%, EVA 1.5-3%, processing technology Additives 0.3-0.6%, 2-mercaptobenzothiazole zinc salt powder 30-40%, sulfenamide accelerator powder 20-30%, tetrabenzylthiuram disulfide accelerator powder 14- 16% and accelerator BG powder 8-12%; this accelerator can give full play to the advantages of various accelerators by combining multiple accelerators in corresponding proportions, and can overcome the problems encountered in the use of a single accelerator. Existing problems; This method improves production efficiency, saves electricity, improves production quality and is environmentally friendly by fully considering the production characteristics of various accelerators and adjusting appropriate processing parameters according to the ratio.

CN201610330183.2 discloses a power cable sheathing material, which is composed of the following raw materials in parts by weight: PVC resin, octyl phenolic tackifying resin, fluorine resin, polystyrene butadiene copolymer, vinyl chloroacetate, Ethyl acrylate, 2-mercaptobenzothiazole zinc salt, sorbitan trioleate, triethylene glycol monoisopropyl ether, p-toluenesulfonyl hydrazide, vinyl-tris(2-methoxyethoxy)silane , tetrapolyethylene glycol monolauryl ether, diallylamine, butyl stearate, 3-10 parts of titanium dioxide, nano-alumina, carbon black, antimony trioxide, polyethylene wax. The sheathing material of the invention has good processing performance and mechanical properties, and the prepared material has high strength, good flexibility, high temperature aging resistance, oil penetration resistance, chemical solvent resistance and long service life.