80 results about "Diphenyl disulfide" patented technology

The invention relates to a cable jacket rubber and a preparation method, wherein the cable jacket rubber has high elastic resilience, softness and abrasive resistance at a low temperature. The cable jacket rubber is characterized in that a base material of the rubber is formed by mixing 30 to 50 weight percent of natural gum and 50 to 70 weight percent of cis-butadiene rubber; a vulcanizing system in a rubber compounding agent is a low-sulfur high-accelerant vulcanizing system, the addition of sulfur is 0.3 to 0.6 weight percent of that of the base material of the rubbere, the addition of the accelerant tetramethylthiuram disulfide is between 1.0 and 1.3 weight percent, the addition of the accelerant N-cyclohexyl-2-benzothiazole sulfonamide is between 1.8 and 2.2 weight percent, and the addition of the accelerant diphenyl disulfide benzothiazole is between 0.6 and 0.9 weight percent. The cable jacket rubber has wide range of working temperature, and can be bent and distorted randomly without cracking at a long-term usage temperature of between 50 DEG C below zero and 70 DEG C, the impact elasticity is high and can reach 42 percent, the specific elongation is more than 350 percent, and the Akron abrasion loss is less than 2 percent, thus the cable jacket rubber is particularly suitable for wind-power generated electricity tower tube cables.

A non-aqueous electrolyte containing propylene carbonate and 1,3-propanesultone as additives can reduce the amount of a gas evolved during storage at a high temperature of a non-aqueous electrolyte secondary cell comprising the electrolyte, a non-aqueous electrolyte containing at least one compound selected from the group consisting of vinylene carbonate, diphenyl disulfide, di-p-tolyldisulfide and bis(4-methoxyphenyl)disulfide as an additive can improve cycle characteristics of a non-aqueous electrolyte secondary cell comprising the electrolyte, and a non-aqueous electrolyte containing a combination of the above two types of additives can provide a non-aqueous electrolyte secondary cell exhibiting excellent retention of capacity and storage stability.

A discharge capacity retention of a non-aqueous secondary battery is enhanced by incorporating into its non-aqueous electrolytic solution a small amount of a substituted diphenyldisulfide derivative in which each of the diphenyl groups has a substituent such as alkoxy, alkenyloxy, alkynyloxy, cycloalkyloxy, aryloxy, acyloxy, alkanesulfonyloxy, arylsulfonyloxy, alkoxycarbonyloxy, aryloxycarbonyloxy, halogen, CF₃, CCl₃, or CBr₃. Preferably, a small amount of methyl 2-propylcarbonate, 2-propynyl methanesulfonate, 1,3-propanesultone, divinylsulfone, 1,4-butanediol dimethanesulfonate or cyclohexylbenzene is further incorporated.

The invention relates to a method for preparing a rubber peptizing agent, namely a 2,2'-dibenzamido diphenyl disulfide compound. The method comprises the following steps of: putting diphenyl disulfide, a deacid reagent, namely triethylamine, and a solvent in a reactor, stirring at room temperature, and slowly dropping benzoyl chloride, wherein the reaction time is 15-30 min; and obtaining the product by filtering, washing and drying after reacting. The mol ratio of the diphenyl disulfide to the deacid reagent to the benzoyl chloride to diethyl ether is (1.0-1.2):(2.0-2.2):(2.0-2.4):(50-70). According to the method disclosed by the invention, the nitrochlorobenzene is used as a raw material; the diphenyl disulfide is synthesized; the reaction speed is rapid; the reaction process is simple;and the purity of the obtained product is high.

The present invention relates to a method for preparing polyarylene sulfide, in which the polyarylene sulfide is prepared by a polymerization reaction of reactants including a diiodo aromatic compound and a sulfur compound, the method including: further adding 0.01 to 10.0 wt. % of diphenyl disulfide with respect to the weight of the polyarylene sulfide to the reactants to form the polyarylene sulfide having a melting point of 265 to 320° C.

The diphenyl disulfide included in the reactants according to the present invention costs far less than other conventional polymerization inhibitors to dramatically lower the production cost, and the polyarylene sulfide prepared using the diphenyl disulfide exhibits low iodine content and very excellence in thermal stability.

The invention relates to the technical field of fine chemical engineering, and discloses a method for preparing asymmetric disulfide. The preparation method comprises the following specific steps: taking 3-methylthio-N-phenylpropionamide and diphenyl disulfide as raw materials, taking N-fluorobisbenzenesulfonamide as an additive, and preferably carrying out a reaction in an acetonitrile solvent under a heating condition so as to obtain a target product, namely the symmetric disulfide N-phenyl-3-(phenyldithioalkyl)propionamide. The method is simple and convenient to operate and mild in reaction, 3-methylthio-N-phenylpropionamide and symmetric diphenyl disulfide are used as reaction raw materials, the asymmetric disulfide product is efficiently synthesized in one step, the use of a thiol rawmaterial with unpleasant smell or a transition metal catalyst is avoided, and the method has a potential application value.

The invention relates to an aromatic sulfonium salt compound and in particular relates to triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton as well as a preparation method and application thereof. The preparation method of the triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton comprises that 1-methyl-2-phenyl indole is taken as a raw material, diphenyl disulfide is taken as a sulfur source, a C-S bond coupling reaction is carried out for synthesizing aromatic sulfide, then a reaction is carried out on the aromatic sulfide and diaryl iodonium salt under the copper-catalyzed condition, so that the triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton is obtained. Ultraviolet absorption wavelength of the triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton can be more than 290nm in a red shift manner, the triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton can be applied to an ultraviolet curing composition, especially ultraviolet curing coating, as a positive ion photoinitiator and has good reaction activity, surface curability and solubility, and the special group, namely 1-methyl-2-phenyl indole, is introduced, so that photo-initiation performance of the triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton is effectively improved.

The invention provides a new method for synthesizing sophocarpine. The method comprises the following steps: removing alpha-position hydrogen in amide in matrine by taking matrine as a raw material and taking lithium diisopropylamide (LDA) as alkali, then directly performing nucleophilic substitution reaction with diphenyl disulfide to obtain 14-thiophenyl matrine, oxidizing by IBX (o-iodyl-benzoic acid) in a water phase to obtain 14-phenylsulfinyl matrine and eliminating benzenesulfenic acid under the assistance of weak alkali to obtain sophocarpine. The method provided by the invention takes the step of oxidizing a nitrogen-containing thioether compound with IBX in a water phase to form sulfoxide as the key step for synthesizing sophocarpine. The method is characterized by high efficiency, environmental friendliness and easiness in operation. The synthesis route is as shown in the description.

The invention discloses a synthetic method of high-molecular-weight linear polyphenylene sulfide. The synthesis method comprises the following steps: synthesizing 4-(thiophenyl)thioanisole by taking polyphenylene sulfide and diphenyl disulfide as raw materials, further synthesizing 4-(sulfophenyl)methyl phenyl sulfoxide through oxidation by using hydrogen peroxide, then carrying out a cationic polymerization reaction on the 4-(sulfophenyl)methyl phenyl sulfoxide under the action of trifluoromethanesulfonic acid to synthesize a polymethyl[4-(thiophenyl)-phenyl]sulfonium trifluoromethanesulfonate; and finally, removing methyl by a nucleophilic reagent pyridine to obtain the polyphenylene sulfide. The polyphenylene sulfide synthesized by the method is high in purity and high in molecular weight and is in linear, the reaction system is mild in condition, operation of the whole process is relatively stable, and the method has an industrial application prospect.

The invention belongs to the technical field of chemical synthesis, and provides a method for preparing a balosavir intermediate. The method comprises the following steps: (1) methylating 3,4-difluorobromobenzene to obtain a compound A-1; (2) reacting the compound A-1 with a Grignard reagent, then introducing carbon dioxide gas for reaction, and adding acid for acidification to obtain a compound A-2; (3) brominating the compound A-2 to obtain a compound A-3; (4) adding diphenyl disulfide and a reducing agent 1 into THF, dropwise adding methanol, dropwise adding the compound A-3, and reacting to obtain a compound A-4; (5) carrying out ring closing reaction on the compound A-4 in polyphosphoric acid to obtain a compound A-5; and (6) reducing the compound A-5 into alcohol by adopting a reducing agent 2 to obtain a compound A-6. According to the method, highly toxic and foul thiophenol is prevented from being used while expensive reagents are prevented from being used, so that the processcost is reduced. The invention also provides an intermediate compound prepared by the method.

The invention relates to the technical field of synthesis of chemical raw materials, in particular to a preparation method for a rubber peptizer DBD. The preparation method comprises the following steps: synthesizing 2-aminobenzothiazole; synthesizing 2,2'-disulfide diphenylamine; synthesizing 2,2'-dibenzoylamino diphenyl disulfide. The rubber prepared with the preparation method is good in peptization effect; no toxic substances generate during preparation; the body health of production workers is ensured; the technological process is simple; the production cost is low; the productivity is high.

The invention relates to a resveratrol preparation method which belongs to the field of food additives and preparing methods thereof. The resveratrol synthesis preparation method comprises the following steps: (1) using 4-methoxybenzyl bromide, triphenyl phosphine and xylene as raw materials for synthesis of triphenyl 4-methoxybenzyl phosphorus bromide (compound I); (2) using the compound I, tetrahydrofuran and 3, 5-dimethoxy benzaldehyde as raw materials for synthesis of a cis / trans-3, 4, 5-trimethoxy-1, 2-diphenylethene mixture (compounds II); (3) using the compound II, tetrahydrofuran and diphenyl disulfide as raw materials for synthesis of trans-3, 4, 5-trimethoxy-1, 2-diphenylethene (compound III); and (4) using the compound III, boron tribromide and methylene chloride as raw materials for synthesis of trans-3, 4, 5-trihydroxy-1, 2-diphenylethene (compound IV), namely resveratrol. The resveratrol synthesis preparation method has the advantages of mild reaction conditions, high yield (on the basis of the 4-methoxybenzyl bromide, the total yield is 66%), high purity (more than 98%) and the like.

The invention belongs to the technical field of benzothiazide derivatives, and discloses a synthetic method of a benzothiazide formaldehyde derivative. The synthesis method comprises the following steps: in the system of an organic solvent, an alkaline compound, a photocatalyst and an additive, carrying out a reaction on a benzenesulfonyl propargylamine derivative in an aerobic environment throughillumination to obtain a benzothiazine formaldehyde derivative, wherein the additive is more than one of diphenyl disulfide and thiophenol. According to the method, the benzothiazine compound is prepared by utilizing the carbon oxidation reaction of alkyne. The method is simple, convenient, efficient and high in regioselectivity, the used raw materials are simple and easy to obtain, no extra organic oxidizing agent needs to be added, oxygen in the air is used as an oxygen source and is environmentally friendly, cheap and easy to obtain. In addition, the whole operation process is simple and feasible, steps are simple and products are easy to purify.

The invention provides diphenyl disulfide type vulcanized peptizer intermediate, namely 2,2'-dinitro-diphenyl disulfide and a preparation method thereof. The preparation method is characterized in that ortho-nitrochlorobenzene, industrial sodium sulfide and sulfur powder are adopted as raw materials, and the 2,2'-dinitro-diphenyl disulfide is synthesized in ethanol. The preparation method has the advantages of simple reaction process and high purity of obtained products.

The invention provides a 3-((4-chlorobenzene base) thio)-5-bromide-1-hydrogen-indole composite method. 5-bromine indole and 4, 4 '-dichloro diphenyl disulfide ether serve as raw materials and are dissolved in an alcohol and water mixed solvent, an reaction is performed for 30 to 60 hours in the presence of strong base under the 80 to 140 DEG C and 5 to 15 pressure conditions, and the purified 3-((4-chlorobenzene base) thio)-5- bromide-1-hydrogen-indole is obtained through aftertreatment. According to the 3-((4-chlorobenzene base) thio)-5- bromide-1-hydrogen-indole composite method, the reaction conditions are mild, metal does not need to be added for metal catalysis in the reaction process, the gas protection is not required, and accordingly the difficulty of the treatment after the reaction is reduced, the reaction cost is greatly reduced, the pollution to the environment is reduced, and emissions of the waste are reduced.

The invention belongs to the field of polyurethane adhesives, and relates to a heat-detachable polyurethane hot melt adhesive, preparation raw materials, and a preparation method and a bonding method of the heat-detachable polyurethane hot melt adhesive. The preparation raw materials for the detachable polyurethane hot melt adhesive comprise a polyol compound, a polyisocyanate compound, a sulfur-containing compound and a catalyst in a mass ratio of 100: (35-120): (2.5-150): (0.1-2), wherein the sulfur-containing compound is at least one selected from 2,2-dithiodiethanol, 4,4-dihydroxy diphenyl disulfide, 4,4-diaminodiphenyl disulfide and liquid polysulfide resin. The polyurethane hot melt adhesive prepared from the raw materials can be completely detached at a high temperature and cannot be automatically separated at the high temperature, so the aim that a bonded part can be detached under a heating condition is perfectly fulfilled.

The invention provides a rubber peptizer SS preparation method. The rubber peptizer SS preparation method includes the steps of subjecting benzothiazole and sodium hydroxide to high-temperature decomposition reaction so as to prepare a sodium aminothiophenol solution; dropwise adding a mixed acid solution prepared from water, sulfuric acid and hydrogen peroxide into the sodium aminothiophenol solution at 35-40 DEG C prior to oxidation reaction, and filtering to obtain DS (2,2'-diphenylamine disulphide) after the oxidation reaction is completed; adding the DS and the water into a reaction kettle, adding sodium carbonate, stirring to increase the temperature to 90-95 DEG C, dropwise adding benzoyl chloride for acylation reaction, cooling after the reaction is completed, performing solid-liquid separation and alcohol washing, and drying at 50 DEG C so as to obtain the SS (2,2'-dibenzoyl diphenyl disulfide). The rubber peptizer SS preparation method has the advantages that the raw materials are free of toxicity, cheap and easily available, and a technological process is simple and easy to operate; toxic solvents are unused, and accordingly a preparation workshop is low in toxicity and less polluted; high yield and high quality are achieved, so that the rubber peptizer SS is promising in market prospect; since the alcohol solvents can be recycled, overall cost is low and rubber peptizer SS purity can be above 98%.