208 results about "DIBENZOTHIAZYL DISULFIDE" patented technology

The invention discloses a fire-retardant cable sheath material formulation and the preparation method thereof. The formulation comprises, by weight parts, 15 to 30 parts of chloroprene rubber, 15 to 30 parts of chlorinated polyethylene, 0.5 to 3.0 parts of zinc oxide, 0.5 to 3.0 parts of magnesium oxide, 0.2 to 1.0 parts of ethylene thiourea, 0.5 to 2.0 parts of dibenzothiazyl disulfide, 0.1 to 0.5 parts of tetramethylthiuram disulfide, 0.5 to 2.0 parts of N-phenyl-2-naphthylamine, 0.5 to 2.0 parts of stearic acid, 0.5 to 3.5 parts of paraffin, 1.0 to 5.0 parts of dioctyl phthalate, 5.0 to 15 parts of carbon black with high abrasion resistance, 5.0 to 15 parts of semi-reinforced carbon black, 3.5 to 10 parts of calcium carbonate, 2.5 to 8 parts of bis(pentabromophenyl) ether, 1.0 to 3.0 parts of antimony trioxide, and 1.0 to 8.0 parts of aluminum hydroxide. The preparation method mainly comprises the following steps: plasticating, blending, mixing, thin-passing and calendaring and extruding the sheath.

An activator composition for the accelerated hardening of cyanoacrylate adhesives, wherein the activator comprises a member selected from the group consisting of: aromatic heterocyclic compounds having at least one N hetero atom in the ring(s) such as pyridines, quinolines and pyrimidines and substituted on the ring(s) with at least one electron-withdrawing group which decreases the base strength of the substituted compound compared to the corresponding unsubstituted compound, mixtures of any of the foregoing with each other, and/or with N,N-dimethyl-p-toluidine, and mixtures of any of the foregoing and/or N,N-dimethyl-p-toluidine with an organic compound containing the structural element, —N═C—S—S—, such as dibenzothiazyl disulfide. 6,6′dithiodinicotinic acid, 2,2′-dipyridyl disulfide, and bis(4-t-butyl-1-isopropyl-2-imidazolyl)disulfide. An activator composition may comprise a solution of one or more activators in a solvent mixture which comprises a volatile hydrocarbon and a cyclic ketone.

The invention relates to a formula of a pair of multi-functional rubber soles, which comprises 50 to 70 parts of butadiene rubber, 8 to 12 parts of natural rubber SCR No.10, 18 to 22 parts of regenerated rubber, 5 to 5.5 parts of zinc oxide, 24 to 28 parts of N774 carbon black, 24 to 28 parts of N550 carbon black, 5 to 8.5 parts of polyisoprene, 1 to 1.5 parts of jianlumizuoxin, 1.5 to 2.5 parts of stearic acid, 1.5 to 2.5 parts of dibenzothiazyl disulfide, 2.5 to 3.5 parts of N-tertiary butyl-(2-benzothiazole) sulfenamide, 0.8 to 1.2 parts of dithiodimorpholine, 3.5 to 4.5 parts of barium sulfate, 5.5 to 8 parts of organic silicon rubber, 10 to 15 parts of nitrile rubber and 5 to 8 parts of polyurethane anti-static agent. According to the soles, the aim of a plurality of functions is achieved; and moreover, the cost is also very low, and the economic benefit is very considerable.

The invention relates to a cable material, and in particular relates to a temperature-resistant damp-proof and insulating methyl vinyl silicone rubber cable material. The cable material comprises the following raw materials in parts by weight: 30-34 parts of methyl vinyl silicone rubber, 23-26 parts of precipitated silica, 10-12 parts of polyvinylidene chloride, 20-23 parts of linear low density polyethylene, 2-3 parts of anti-aging agent KY-405, 1-2 parts of anti-aging agent MB, 3-4 parts of magnesium oxide, 4-5 parts of stearic acid, 1-2 parts of dibenzothiazyl disulfide DM, 2-3 parts of paraffin, 3-5 parts of vaseline, 30-34 parts of spraying carbon black, 14-18 parts of nano bauxite, 20-25 parts of butyl rubber (CBK139), 5-7 parts of tributyl citrate, 2-3 parts of sulphur, 2-3 parts of zinc oxide and 4-5 parts of auxiliary. The cable material integrates the advantages of the raw materials such as the methyl vinyl silicone rubber, the butyl rubber, the polyvinylidene chloride and the linear low density polyethylene; the performance of the traditional silicone rubber cable material is improved; the temperature-resistant damp-proof and insulating methyl vinyl silicone rubber cable material provided by the invention has excellent high-temperature and low-temperature resistance and water-proof and damp-proof performance, as well as good insulation performance, can be adapted to a specific application environment condition, and therefore is wide in market prospect.

The invention relates to a microwave vulcanized EPDM sponge sheath and a processing method thereof. Rubber components for the sponge sheath comprise EPDM rubber, fast extruding carbon black, light calcium carbonate, paraffin oil, white factice, a dehumidifying and antifoaming agent, zinc oxide, stearic acid, polyethylene glycol, azodicarbonamide, N-cyclohexyl-2-benzothiazolesulfenamide, dibenzothiazyl disulfide, tetramethyl-thiuram disulfide and sulphur. According to the invention, mixed stock is extruded by an extruder which works under the condition that temperatures of a head, a screw section, a plasticizing section and a feeding section are set; microwave vulcanization is carried out by allowing a semi-finished product extruded by the extruder to directly enter into microwave vulcanizing equipment for vulcanization, with microwave total power maintained to be in range of 6000 to 8000 W, temperature of a microwave section set to be 200 DEG C, and temperature of a heating section set to be 200 to 220 DEG C from beginning to end. The invention enables a uniformly distributed closed pore bubble structure to be formed easily and dimension of a product to be controlled easily. Rapid heat generation of microwave enables vulcanization time to be reduced to some extend, thereby improving production efficiency.

The invention relates to a chlorosulfonated polyethylene lead-free recipe for a power steering pipe. The recipe contains the following components: 100 parts of chlorosulfonated polyethylene rubber (CSM), 30-50 parts of fast extruding furnace black (N550), 15-35 parts of softener T810T, 5-20 parts of dioctyl sebacate (DOS), 10-20 parts of light calcium carbonate, 0.5-2 parts of flow promotor WS1 80, 0.5-2 parts of flow promotor WA 48, 0.5-2 parts of antiager NDBC, 0.5-3 parts of N'N-m-phenylene dimaleimide (HVA-2), 0.5-2 parts of dipentamethylenethiuram tetrasulfide (DPTT) and 0.5-1 part of dibenzothiazyl disulfide DM. The recipe has the characteristics of high strength, high hardness, low compression residual deformation, oil resistance and the like, thereby completely meeting the demands of the power steering pipes; meanwhile, the recipe has no toxin or odor and is stable in storage.

The invention discloses cable insulated rubber for the ship hydrophone equipment and a preparation method thereof. The rubber comprises the following components in parts by weight: 11 parts of ethylene propylene rubber 2470, 7-9 parts of ethylene propylene rubber 578K, 0.1-0.3 part of dibenzothiazyl disulfide, 1.5-2.5 parts of zinc oxide, 0.5-0.8 part of 2-Mercaptobenzimidazole, 0.4-0.7 part of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 1-1.5 parts of titanium white powder, 1.5-2.0 parts of microcrystalline wax, 0.2-0.5 part of stearic acid, 2-3 parts of white carbon black, 8-12 parts of ultrafine coupling agent, 0.2-0.4 part of calcined clay, 5-8 parts of ultrafine talcum powder, 1-1.5 parts of red lead masterbatch, 1-1.5 parts of dicumyl peroxide and 0.15-0.25 part of quinone dioxime. The preparation method comprises the following steps: mixing ethylene propylene rubber, then adding zinc oxide and some components, filtering rubber, rolling, cooling, adding dibenzothiazyl disulfide, finally adding dicumyl peroxide and quinone dioxime, performing triangle packaging, thinning, and discharging the prepared rubber sheets. The insulated rubber of the invention has good insulating property and long service life and can meet the operational requirements of the ship hydrophone equipment.

The invention relates to an ethylene propylene diene monomer hose suitable for microwave vulcanization. The hose is prepared by the following components in part by mass: 100 parts of ethylene propylene diene monomer, 120-160 parts of fast extruding carbon black, 40-60 parts of light calcium carbonate, 70-90 parts of paraffin oil, 5-15 parts of dehumidification defoaming agent, 4-6 parts of zinc dioxide, 1-3 parts of stearic acid, 1-3 parts of polyethylene glycol, 1-3 parts of 2,2,4-trimethyl-1,2-dhydroquinoline polymer, 1-2 parts of N-cyclohexyl-2-benzothiazolyl sulfonamide, 0.5-1.5 parts of dibenzothiazyl disulfide, 0.5-1.5 parts of tetramethylthiuram disulfide and 1-2 parts of sulfur. The hose can achieve the goal of improving the production efficiency, saving labor resource and raw material while meeting the product performance by employing the formulation special for microwave vulcanization.

The invention relates to a method for preparing low-leaching-rate water-swellable rubbers. The prepared low-leaching-rate water-swellable rubber comprises the following raw materials in parts by weight: 100 parts of obtained modified rubbers, 10 to 40 parts of obtained super water absorbent resins, 5 to 30 parts of plant fiber powder, 2 to 8 parts of zinc oxide, 0.2 to 1 parts of stearic acid, 1 to 5 parts of sulphur, 0.5 to 4 parts of dibenzothiazyl disulfide, 10 to 80 parts of filler, and 5 to 50 parts of softener, and the method comprises the following steps: mixing the raw materials for 5 to 60 minutes; standing the obtained mixture for 10 to 12 hours; and carrying out vulcanization and pressure molding on the obtained deposit so as to obtain the low-leaching-rate water-swellable rubbers. The rubbers prepared by using the method of the invention have the characteristics of high expansion ratio, low leaching rate and good water retention performance. The invention overcomes the defects that strongly polar bibulous trees subjected to soaking in traditional water-swellable rubbers are easy to desorb from the rubbers, and the expansion rate of the traditional water-swellable rubber after used repeatedly is reduced; and the preparation method is simple, and low in equipment requirement.

The invention discloses a low-cost flame-retardant cable sheath material which is prepared from the following raw materials in parts by weight: 10-30 parts of epichlorohydrin rubber, 20-30 parts of chloroprene rubber, 0.7-1.3 parts of stearic acid, 10-15 parts of semi-reinforcing carbon black, 1.5-3 parts of zinc oxide, 1.5-2.4 parts of ethylene thiourea, 5-10 parts of aluminum hydroxide, 5-10 parts of decabromodiphenyl oxide, 1-3 parts of dibenzothiazyl disulfide, 0.2-0.35 part of tetramethyl-thiuram disulfide, 0.15-0.3 part of trimethylolpropane trimethyl acrylate and 1-2.5 parts of antioxidant. The antioxidant is composed of the following components in percentage by weight: 40-60% of 2,6-di-tert-butyl-4-(dimethylaminomethyl)phenol, 20-40% of antioxidant GS and 10-30% of antioxidant 168. The low-cost flame-retardant cable sheath material has the advantages of excellent flame-retardant effect, favorable tensile property, excellent oxidation resistance and low cost.

The invention relates to an oil-resistant rubber cushion which comprises 90 parts of ethylene propylene diene monomer, 75 parts of tetrapropyl fluororubber, 7 parts of calcium carbonate, 3 parts of dibenzothiazyl disulfide, 5 parts of paraffin and 6 parts of plasticizing and softening agent. The rubber pipe clamp also comprises 3 parts of stearic acid. The rubber pipe clamp also comprises 5 parts of tetraethylthiuram disulfide. Compared with the prior art, the high-temperature-resistant rubber foot pad enhances the oil resistance of the natural rubber to 8-10%, and has favorable heat resistance and air tightness.

The invention relates to a preparation method of rubber accelerator dibenzothiazyl disulfide. The preparation method comprises the following steps of: measuring 500 ml of M-Na salt solution; dropwise adding mixed oxidant into a container with the M-Na salt solution according to a proportion of 58-80 ml of mixed oxidant per every liter of M-Na salt solution under a stirring condition at 70-80 DEG C; controlling the pH (Potential of Hydrogen) to be stable in a range of 6.5 to 7.5; adding 0.1-0.2 g of 30 percent sodium hydroxide solution after the pH is stabilized; directly oxidizing the M-Na salt to obtain a DM product. The preparation method has the advantages that (1) a hydrogen peroxide stabilizer is added, so that the oxidation of the oxidant is improved, (2) no toxic gas is produced in a production process, so that the environmental pollution is less, the operation is easy and the production period is short, (3) a product has white appearance, high purity and a melting point of greater than or equal to 173 DEG C, (4) a small amount of caustic soda liquid is added, so that the product quality and the purity are improved, and (5) separation can be performed without cooling after the reaction is finished, so that the process period is shortened, the energy consumption is reduced and the cost is saved.

The invention relates to an amino-protected 3-hydroxy adamantane glycine benzothiazole-2-thiol active ester as well as a preparation method and application thereof. The thiol active ester is prepared by virtue of reaction between amino-protected 3-hydroxy adamantane glycine and dibenzothiazyl disulfide. The invention further discloses application of the compound in the preparation of a saxagliptin intermediate and saxagliptin. The invention provides a brand new chemical structure. The preparation method is simple and low in cost; the compound is applicable to the preparation of saxagliptin, so that the preparation process can be effectively simplified; and the reaction is mild, and the compound has a wide generalization prospect.

The invention discloses a high-property modified nitrile butadiene rubber cable material used for ships. The cable material comprises the following raw materials in parts by weight: 20-40 parts of nitrile butadiene rubber, 5-10 parts of modified polyurethane composite material, 12-18 parts of styrene butadiene rubber, 5-15 parts of butadiene rubber, 1-2 parts of oleic acid, 0.5-1.5 parts of stearic acid, 1-2 parts of ammonium dichromate, 0.8-1.4 parts of dibenzothiazyl disulfide, 15-30 parts of kaolin, 8-12 parts of pottery clay powder, 42-55 parts of white carbon black, 5-10 parts of graphite, 1-3 parts of octyl-phenolic tackifying resin, 10-30 parts of ceramic fibers, 20-40 parts of modified active fibers, 0.5-1.5 parts of diisooctyl phthalate, 1-1.4 parts of aromatic hydrocarbon oil, 0.4-0.8 part of naphthenic hydrocarbon oil, 0.5-1.4 parts of antioxidant AT-215, 1-3 parts of ultraviolet absorber UV-531 and 1-2 parts of ultraviolet absorber TB75. The cable material has good thermal oxidative stability and excellent mechanical properties and is resistant to aging.

The invention discloses a braiding wave prevention sleeve for aviation. The braiding wave prevention sleeve for aviation comprises a plurality of cable intertwisted with each other. The plurality of cables are coated with a cable sleeve. The cable sleeve material comprises nitrile rubber, butadiene styrene rubber, nano copper oxide, nano aluminum oxide, graphite, tetramethyl-thiuram disulfide, dibenzothiazyl disulfide, manganese powder and aluminum powder. The cable sleeve material comprises, by weight, 50-100 parts of butadiene styrene rubber, 1-5 parts of nano copper oxide, 0.5-3 parts of nano aluminum oxide, 3-10 parts of graphite, 1-5 parts of tetramethyl-thiuram disulfide, 1-5 parts of dibenzothiazyl disulfide, 3-7 parts of manganese powder and 1-10 parts of aluminum powder relative to 100 parts of nitrile rubber. Good shielding property is achieved, and the braiding wave prevention sleeve has a long service life when used in the aviation field.

The invention provides a method for refining pharmaceutical dibenzothiazyl disulfide (DM). In the method, a crude product DM, an ethyl acetate solvent and an ethanol solvent are used as the raw materials. The method comprises the following steps of: mixing ethyl acetate and ethanol according to the volume ratio of 1: (4 to 8); adding the crude product DM into the mixture with stirring, wherein the mass ratio of the crude product DM to ethyl acetate is 1.00: (0.35 to 0.55); controlling a temperature in the range of 65 to 75 DEG C so that the crude product DM is totally dissolved, then adding 0.1 to 5 percent of activated carbon into solution, stirring the solution for 1 to 2 hours, carrying out extraction filtration to separate out the activated carbon, cooling mother liquor to the temperature of 0 to 30 DEG C and separating out DM crystals; and stopping stirring, carrying out vacuum extraction filtration, washing by mixed solution with the volume ratio of ethyl acetate to ethanol of 1: (4 to 8) to obtain wet refined DM, drying the wet refined DM to obtain white acicular crystals, i.e. the pharmaceutical DM. The crude product DM has the initial melting point of lower than or equal to 176 DEG C and purity of lower than or equal to 98 percent and contains impurities of resin, M (2-mercaptobenzothiazole) and the like. Due to the adoption of the method, the pharmaceutical DM can be produced greenly, efficiently and safely. The obtained pharmaceutical DM product has high quality and low integrated cost, is obviously superior to the product obtained by the existing refining process and can meet the requirement of the international high-end market.

The invention discloses a foamed elastic cushion block for a high-speed rail. The foamed elastic cushion block comprises the following components in parts by weight: 80-120 parts of EPDM (Ethylene-Propylene-Diene Monomer), 40-70 parts of carbon black, 10-30 parts of white carbon black, 1-3 parts of stearic acid, 3-7 parts of zinc oxide, 4-8 parts of coupling agent Si69, 10-30 parts of paraffin hydrocarbon oil, 1.0-2.0 parts of anti-aging agent RD, 0.5-1.5 parts of sulfur, 0.5-1.5 parts of accelerator TMTD (Tetramethyl Thiuram Disulfide), 0.5-1.5 parts of accelerator DPTT (Dipentamethylene Thiuram Tetrasulfide), 0.5-1.5 parts of accelerator DM (2,2'-dibenzothiazyl disulfide), 0.5-1.5 parts of accelerator EZ (Zinc Diethyldithiocarbamate) and 2-4 parts of foaming agent OBHS (4,4'-Oxybis(benzene sulfonyl hydrazide)). The strength of the foamed elastic cushion block can reach over 4 MPa, the dynamic multiplying power is less than 1.35; and the foamed elastic cushion block has the advantages of high strength, low dynamic multiplying power, superior heat resistance and weather resistance and good insulation performance, so that good vibration absorption and endurance performance are guaranteed.