123results about How to "Reduce self-aggregation" patented technology

A method for preparing a graphene oxide/white carbon black/rubber nanocomposite material is described. The prepared graphene oxide/white carbon black/rubber nanocomposite material contains nanoscale graphene oxide and white carbon black that are highly dispersed. The nanocomposite material has a relatively high modulus, excellent wear resistance and tear resistance, a relatively low rolling resistance, and at the same time has a low air-permeability and excellent self-healing capability.

The invention relates to a preparation method of normal pressure cation dyeable copolyester, comprising the following steps of: (1) carrying out esterification reaction to glycol, terephthalic acid and m-phthalic acid; (2) adding glycol, mixing uniformly, then adding SIPE solution and carrying out ester exchange reaction; and (3) adding aliphatic dibasic acid into mixture obtained after ester exchange reaction, uniformly mixing, then carrying out polycondensation reaction and preparing normal pressure cation dyeable copolyester, wherein the molar ratio of the terephthalic acid and m-phthalic acid is 50:1 to 90:1, the ratio of mole number of the aliphatic dibasic acid and the sum of the mole numbers of the terephthalic acid and m-phthalic acid is 0.05:1 to 0.15:1; the ratio of the mole number of the added glycol in the step (2) and the sum of the mole numbers of the terephthalic acid and m-phthalic acid is 0.1:1 to 0.5:1; the ratio of the sum of the mole numbers of the terephthalic acid, m-phthalic acid and the aliphatic dibasic acid and the mole number of the sulfonic acid group in SIPE solution is 9:1 to 28:1.

The invention provides a separation method of diolefin in carbon-5 aiming at the problem of high content of cyclopentadiene in isoprene when the diolefin in carbon-5 is separated by utilizing the post-heating dimerization method. The method comprises the following steps of: carrying out thermal dimerization reaction for two times, carrying out heavy removal for two times and removing the cyclopentadiene in the carbon-5 by using a special thermal dipolymer reactor. The content of the cyclopentadiene in the isoprene prepared by adopting the method is below 1 percent (weight), and meanwhile, thecontent of cyclopentadiene in produced piperylene is less than 1 percent (weight); and the content of an isoprene autopolymer or an isoprene copolymer in dicyclopentadiene can reach the level of a post-heating dimerization carbon-5 separation technology. The invention also discloses equipment for implementing the separation method at the same time.

The invention provides a method for preparing primary structure-grafted and modified white carbon black. Under conditions of high temperature, high pressure and high shear, a white carbon black aggregation is dissociated, and a primary structure is formed, through a grafting reaction of the primary structure white carbon black and a modifier, finally, a primary-structure white carbon black modifier grafting substance is formed. According to the invention, problem of self agglomeration of the white carbon black can be effectively solved, and uniform modification of the white carbon black is realized.

The invention discloses a preparation method of a glucoside cationic surfactant, which is characterized by comprising the following steps: (1), adding raw materials including glucose, chlorohydrins and a catalyst in to a reactor in a ratio of 1:2-5:0.002-0.01 and performing a dehydration reaction under a reduced pressure for 30 to 120 minutes at 80 to 110 DEG C to obtain yellowish or colorless transparent sticky liquid; (2) neutralizing the reaction product with a neutralizer till the pH value of the reaction product is 7 to 8 and performing molecular distillation at 100 to 180 DEG C and under 1 to 3MPa to obtain solid chlorinated glucoside; and (3) preparing 30 to 60 percent aqueous solution of the chlorinated glucoside, slowly adding tertiary amine, which is added with an organic solvent, into the solution of the chlorinated glucoside in a molar ratio of 1:0.5-1.0 and performing a reaction at 60 to 90 DEG C and under normal pressure for 2 to 10 hours to obtain transparent solution of the glucoside cationic surfactant.

The invention provides a novel carbamido-containing metal-organic frame (MOF) material. The material is used as a hydrogen bond donor (HBD) catalyst, the hydrogen bond donor MOF catalyst can efficiently catalyze nitrostyrolene to react with Friedel-Crafts of indoles (F-C reaction), and very high reaction yield can be obtained at a very low catalyst loading capacity, and the catalyst can be recycled for multiple times. Moreover, compared with other catalysts, the catalyst has superhigh catalytic reaction activity.

The invention discloses a cement reinforcing agent, a preparation method, and application thereof. The cement reinforcing agent is synthesized by using an amino silane coupling agent for modifying a wet-process-produced white carbon black product through a chemical coupling reaction. Relative to 100 parts by weight of wet-process white carbon black, the chemical modification process needs 500-1300 parts by weight of deionized water, 1-15 parts of a silane coupling modifier, 1-2 parts of an anionic surfactant, and 10-30 parts of an organic solvent. A national standard GB/T17671-1999 method is employed, the addition amount of the product is only 1.0-2.0 parts relative to the cement mass, and compared with 7-day strength of black cement, the strength is improved by about 30 times.

The present invention discloses a spraying film waterproof material for improving spraying film main liquid stability, wherein the components comprise, by weight, a main liquid and acrylates, and specifically comprise, by weight, 100 parts of a main liquid, 5-20 parts of a 30% calcium acrylate liquid, and 0.8-2.0 parts of a zinc acrylate aqueous solution. According to the present invention, the self-polymerization and the agglomeration of the spraying film main liquid can be effectively solved so as to improve the spraying film main liquid stability, ensure the smooth performing of the spraying film construction, and stabilize the mechanical property of the spraying film waterproof material.

The present invention belongs to the field of chemical industry preparation, and particularly relates to a glycerol tert-butyl ether preparation method, which comprises that glycerol, diisobutylene, liquefied petroleum gas and an acidic catalyst are subjected to an alkylation reaction to obtain the glycerol tert-butyl ether. According to the present invention, glycerol and isobutylene are subjected to an addition reaction under the action of a cationic acidic catalyst to form the glycerol tert-butyl ether; the process belongs to the ideal atomic economic reaction, the process route is simplified, the total number of the equipment is less, the diisobutylene is introduced into the reaction raw materials so as to reduce the isobutylene self-polymerization, the side-product is less during the whole preparation process, the viscosity of glycerol is effectively reduced, and the solubility of isobutylene in the liquid phase is increased; the process is low carbon and environmental protection, the acidic catalyst used in the reaction is non-toxic and harmless, and the production process is environmentally friendly; the enol addition etherification method can be widely used and can replace the alkyd esterification method; and the preparation method has great market prospects and great economic value.

The invention relates to a preparing method for antioxidant-modified carbon nano tube/hydrogenated butadiene-acrylonitrile rubber. The preparing method comprises the steps that firstly, a hindered phenol antioxidant is grafted to the surfaces of carbon nano tubes through a solid phase reaction from the angle of the molecular structure, then the antioxidant-modified carbon nano tube filler, hydrogenated butadiene-acrylonitrile rubber, a vulcanizing agent, an activating agent and a co-vulcanizing agent are mixed and vulcanized, and the product is obtained. The hydrogenated butadiene-acrylonitrile rubber prepared with the method has excellent mechanical properties, high-temperature resistance and hot oxygen aging resistance; besides, the antioxidant is not prone to self-aggregation and not likely to be separated from the rubber material, and thus the rubber product can have more stable performance; furthermore, no organic solvent is adopted, and environment friendliness of the preparing process is achieved.

The invention relates to the technical field of polymer material modification, and particularly discloses a polypropylene material having high melt strength and a preparing method thereof. The methodincludes (1) fully mixing 100 parts of polypropylene powder, 2-30 parts of a grafting monomer and 0.01-2 parts of an initiator; and (2) reacting the mixture at 110-140 DEG C for 1-2 h, cooling the reaction product, then adding 0.5-1.5 parts of an antioxidant, and granulating the mixture through an extruder to obtain the polypropylene having high melt strength. Through adjusting the ratio of the polypropylene, the grafting monomer and the initiator, a prepared product is stable in quality, excellent in processing performance and prone to industrial production, and can be applied in the fields of blow molding, vacuum thermal forming, extrusion coating, foaming, and the like.

The invention relates to a production method of normal-pressure cation dyeable copolyester endless tow, chopped fiber and top wool. The normal-pressure cation dyeable copolyester endless tow is obtained by spinning normal-pressure cation dyeable copolyesters. A preparation method of the normal-pressure cation dyeable copolyesters comprises the following steps of: (1) carrying out an esterification reaction on ethylene glycol, terephthalic acid and m-phthalic acid; (2) adding ethylene glycol, mixing, adding an SIPE (5-Sodium Sulfonate Isophthalate Ethyl-ester) solution and carrying out an ester exchange reaction; and (3) adding a mixture obtained in the ester exchange reaction into binary fatty acid, mixing uniformly, and carrying out a condensation polymerization reaction to obtain the normal-pressure cation dyeable copolyesters, wherein the molar ratio of the terephthalic acid to the m-phthalic acid is 50:1-90:1; the ratio of the mole number of the ethylene glycol added in the step (2) to the total mole number of the terephthalic acid and the m-phthalic acid is 0.1:1-0.5:1; and the ratio of the total mole number of the terephthalic acid, the m-phthalic acid and the binary fatty acid to the total mole number of sulfonic acid groups in the SIPE solution is 9:1-28:1.

The invention discloses a method for increasing weight and bulkiness of silk floss. The method comprises the steps of preparing the silk floss; degumming the silk floss; washing the silk floss; increasing weight of the silk floss; bulking and cleaning the silk floss; and drying the silk floss. The weight increasing process is as follows: preparing working solution, dissolving the working solution, adding the silk floss, soaking for 10min at room temperature; rising temperature to 80 DEG C with speed of 1 DEG C/min, continuously reacting for 90 min; performing water washing; removing the working solution; and performing water washing for 10min at room temperature, wherein the working solution comprises a composite of acrylamide substances and methacrylate substances, potassium peroxydisulfate, formic acid, non-ionic surfactant Tween 80 and calcium chloride, a mass ratio of the acrylamide substances and the methacrylate substances is 4: 1 to 9: 1, and the adding amount of the composite is 15-20% of the silk floss; the adding amount of the potassium peroxydisulfate is 4% of the composite; the adding amount of the formic acid is 3g/L; the dosage of the Tween 80 is 0.5g/L; and the dosage of the calcium chloride is 40g/L and liquor ratio is 1: 15;. The method disclosed by the invention finally increases weight by about 7-10%.

The invention discloses a novel electronic material with high thermal stability and a preparation method thereof and belongs to the field of high molecular materials for electronics. The preparation method comprises the following steps: Firstly, after carrying out chain expanding on nano silicon dioxide through polyacrylic acid, mixing with tetraethylenepentamine and polyethylenimine to prepare aminated nano silicon dioxide; then grafting the nano silicon dioxide with an epoxy group under the action of isocyanate; then grafting a flexible chain section containing hydroxyl on the nano silicon dioxide grafted with the epoxy group under the action of alkaline amine, so as to prepare modified nano silicon dioxide; finally, mixing epoxy resin, filler, a diluting agent, the aminated nano silicondioxide, the modified nano silicon dioxide, epoxidized soybean oil and a catalyst to prepare the novel electronic material with high thermal stability. The novel electronic material with high thermalstability, prepared by the technical scheme, can have very good utilization performance under a high-temperature condition.