5 results about "Dithiodimorpholine" patented technology

The application belongs to the technical field of rubber additive synthesis, and particularly relates to a method for continuously preparing 4,4'-dithiodimorpholine. The method uses sulfur monochloride, morpholine, 32wt% liquid alkali (sodium hydroxide solution) and 120# solvent oil as raw materials, and generates 4,4'-dithiodimorpholine in a dynamic tubular reactor. After the reaction is completed, the material flowing out of the dynamic tubular reactor is collected, and the product is obtained through static layering, washing, filtering and drying. The method uses the dynamic tubular reactor for reaction, and the mass transfer and heat transfer efficiency are extremely high. The material is instantaneously and uniformly mixed, so that the morpholine and the sulfur monochloride are rapidly contacted and reacted, the reaction heat can be instantaneously removed, the optimal reaction temperature can be accurately maintained, the continuous production can be realized, the production capacity is greatly improved, the reaction time of the traditional kettle reactor is shortened from 2-7h to 10min, the raw material conversion rate is as high as 99% or more, and the goals of cost reduction and efficiency improvement, green safety are finally achieved.

The invention belongs to the field of rubber materials, and particularly relates to a durable high-resilience rubber composite material and a preparation method thereof. The rubber composite material provided by the invention is prepared from the following raw materials: natural rubber, high trans-1, 4-butadiene-isoprene copolymer rubber, high butadiene rubber, epoxy natural rubber grafted lignosulfonate, tetrapod-like zinc oxide whiskers, nano spherical zinc oxide, stearic acid, an anti-aging agent, a flame retardant, a vulcanizing agent, a first accelerant and a second accelerant. The first accelerant is selected from sulfoxide diethyldithiocarbamate, sulfoxide dibenzyl dithiocarbamate, sulfone dithiocarbamate and sulfone dibenzyl dithiocarbamate, and the second accelerant is selected from sulfoxide diethyldithiocarbamate, sulfoxide dibenzyl dithiocarbamate, sulfone dithiocarbamate and sulfone dibenzyl dithiocarbamate; the second accelerant is 4, 4 '-dithio-dimorpholine, 2-morpholinyl dithio-benzothiazole, N-oxydiethylene-2-benzothiazole sulfenamide, and dibenzoyl morpholine. The invention further discloses a preparation method of the flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame retardant. The rubber composite material provided by the invention has excellent high resilience and use durability.

The present invention relates to a styrene-butadiene rubber with a high friction coefficient and a preparation method of such rubber, wherein the components and their mass fractions are: styrene-butadiene rubber: 100 parts, quick-pressed carbon black: 30-50 parts, light calcium carbonate: 30-50 parts, paraffin oil: 10-30 parts, zinc oxide: 4-6 parts, stearic acid: 1 part, butene derivatives: 6-12 parts, graphene: 3-6 parts, N-cyclohexyl-2-benzothiazole sulfonamide (CZ): 1-2 parts, tetramethylthiuram disulfide (TMTD): 0.5-1 parts, 4,4′-dithiodimorpholine (DTDM): 1-2 parts, and sulfur (S): 1-2 parts. The styrene-butadiene rubber obtained by the present invention has a friction coefficient of more than 3 on a wet tile surface and a friction coefficient of more than 18 on a dry tile surface, and has a good anti-slip effect.

The invention relates to the technical field of rubber materials, and discloses a degradable natural rubber modified material and a preparation method thereof. The degradable natural rubber modified material prepared by the invention is prepared by taking natural rubber as a main raw material, adding thiourea modified lignin, epoxidized natural rubber, zinc oxide, calcium carbonate, a silane coupling agent, a vulcanizing agent, 4, 4 '-dithiodimorpholine and other functional aids, mixing, mixing and vulcanizing. The material has the advantages of degradability and aging resistance at the same time.

The invention discloses a rubber material for motor damping and a preparation method thereof, and the rubber material comprises the following components in parts by mass: 60-80 parts of nitrile rubber, 20-40 parts of brominated butyl rubber, 40-60 parts of a reinforcing agent, 20-30 parts of a softening agent, 5-10 parts of an active agent, 4-8 parts of an anti-aging agent, 5-20 parts of a damping agent, 1.55-1.75 parts of a rubber composite vulcanizing agent and 0.5-2 parts of an accelerant. Wherein the sum of the mass parts of the nitrile rubber and the brominated butyl rubber is 100, the rubber composite vulcanizing agent is at least two of 4, 4 '-dithiodimorpholine DTDM, dipentamethylenethiuram tetrasulfide DPTT and tetramethylthiuram disulfide TT, and the technical problem that in the prior art, the vibration noise of a motor in a range hood is large is solved.