54 results about "Tert-butylacrylamide" patented technology

The invention relates to a preparation method for an intelligent temperature-variable and immersion-proof shell fabric and a product thereof. The preparation method comprises the following steps: 1. temperature-variable copolymer of N-tert-butyl-acrylamide and acrylamide is obtained through the composition with a to b as the mole ratio of incoming stocks; wherein, the a lies between 60 and 40, and the b lies between 40 and 60; 2. a coating layer liquid is prepared according to the following concentration formulation by mass: 8 to 15 percent of the copolymer, 2.0 to 5.0 percent of a crosslinking agent that is 1,2,3,4-butane tetrabasic carboxylic acid and 0.5 to 2.5 percent of a catalyst that is sodium hypophosphite; 3.the coating layer liquid is used for coating a preprocessed fabric; 4. the immersion-proof shell fabric can be obtained through post processing. The product is produced by adopting the preparation method of the intelligent temperature-variable and immersion-proof fabric of the invention.

The invention discloses an environmentally-friendly scale and corrosion inhibitor and a preparation method thereof. The environmentally-friendly scale and corrosion inhibitor comprises the following ingredients in parts by weight relative to the total mass of scale and corrosion inhibitor: 10-15% of hydrolytic polymaleic anhydride, 14-20% of acrylic acid/2-acrylamide-2-methyl propanesulfonic acid/n-tert-butyl acrylamide terpolymer, 0.5-1% of ammonium persulfate, 5-10% of carboxyalkylthiosuccinic acid, 5-8% of sodium gluconate, 1-2% of methylbenzotriazole and the balance of deionized water. The scale and corrosion inhibitor has the advantages of no phosphorus or zinc, environment protection and excellent scale and corrosion inhibition effect.

The invention relates to a preparation method of difunctional copolymerized nanoparticle inhibitor and application thereof in inhibition and detoxification of amyloid beta protein aggregation. The preparation method includes: using a connection product GMA-IDA of iminodiacetic acid (IDA) and glycidyl methacrylate (GMA) as a monomer; subjecting the monomer to free radical copolymerization reaction with monomers like N-isopropylaccrylamide (NIPAm) and n-tertbutyl acrylamide (TBAm) to synthesize the difunctional nanoparticle inhibitor having metal chelation ability and protein aggregation inhibiting ability. Average particle diameter of difunctional copolymerized nanoparticles synthesized by the method is 80-120nm. Metal ion chelation capacity of the nanoparticles synthesized by the method is higher than 700umol/g, and the nanoparticles can chelate metal ions in environment and inhibit fibrosis aggregation of Abeta42 and are a potential new drug raw material for treating Alzheimer's disease.

The invention discloses a synthesis method of tert-butyl acrylamide sulfonate, which comprises the following steps of: providing a first solution and a second solution, wherein the first solution is obtained through contact between acrylonitrile and a first sulfonating agent at -30 to 15 DEG C, and the second solution is obtained through contact between acrylonitrile and a second sulfonating agent at -30 to 15 DEG C; at -20 to 50 DEG C, enabling the first solution to contact with isobutene accounting for 10-100% of isobutene feed and the second solution to obtain a third solution; at -20 to 50 DEG C, enabling the third solution to contact with isobutene accounting for 0-90% of the isobutene feed to obtain a paste product; and separating and purifying the paste product to obtain tert-butyl acrylamide sulfonate. Through the method disclosed by the invention, other substances are not required in a reaction system, the production cost is greatly reduced, and the purity is improved.

The invention discloses a carbon nano tube surface lysozyme molecularly-imprinted polymer. The carbon nano tube surface lysozyme molecularly-imprinted polymer adopts lysozyme as a template molecule, adopts 1-allyl-3-methylimidazolium hexafluorophate ionic liquid and N-tert-butyl acrylamide as a mixing functional monomer, adopts an acrylamide modified carbon nanotube as a matrix, adopts a Tris-HCl buffer solution with the pH being 9 as a reaction system, is obtained under the effect of a cross-linking agent, an initiating agent and a catalyst and has the selective recognition capacity for lysozyme. The number of acting sites is multiple when the template molecule and the functional monomer are combined, the acting force is higher, more effective recognition sites can be formed in the preparation process of the molecularly-imprinted polymer, and therefore the printing effect and the preferential adsorption capacity for lysozyme are better.

The present invention relates to a method for comprehensive utilization of 2-acrylamide-2-methylpropanesulfonic acid production process waste residue. The method comprises: mixing AMPS production waste residue and a solvent, filtering, carrying out vacuum heating on the filtrate, continuously heating the remaining solid after evaporating the solvent so as to sublime the remaining solid, recovering the sublimed product to obtain N-t-butyl acrylamide, and obtaining 2-acrylamide-2-methylpropanesulfonic acid from the unsublimated remaining solid, wherein the purity of the recovered N-t-butyl acrylamide is more than or equal to 98%, and the purity of the 2-acrylamide-2-methylpropanesulfonic acid is more than or equal to 96%. The invention further provides a recovery apparatus for the method, wherein the recovery apparatus comprises a heatable separation container for heating the 2-acrylamide-2-methylpropanesulfonic acid production waste residue, a temperature-adjustable collection container for collecting the sublimed N-t-butyl acrylamide, and a vacuum system.

The invention relates to a production method of acrylamido tertiary butyl sulfonic acid. The production method comprises the following steps of 1, mixing acrylonitrile and a sulfonating agent to obtain a sulfonating agent-containing acrylonitrile solution, 2, providing a horizontal stirring reactor, and continuously feeding the mixed solution obtained by the step into the horizontal stirring reactor so that the mixed solution contacts with isobutene and product slurry is formed, 3, continuously discharging the product slurry from the horizontal stirring reactor, and filtering the product slurry to obtain acrylamido tertiary butyl sulfonic acid-containing filter cake, and 4, drying the filter cake obtained by the step 3 to obtain an acrylamido tertiary butyl sulfonic acid crude product having mass content more than 96.0%.

The invention discloses a preparation technology of a water phase transmission drag reducer for slickwater fracturing, and belongs to the field of oil field chemical water phase drag reduction technology. The preparation technology comprises following steps: an acrylamide monomer aqueous solution with a mass concentration of 18.5 to 25.5% is prepared; tert-butylacrylamide is added, wherein the content of tert-Butylacrylamide is 0.2 to 2.0wt% of that of the acrylamide monomer aqueous solution; sodium carbonate is added, wherein the content of sodium carbonate is 2.5 to 8.0wt% of that of the acrylamide monomer aqueous solution; a chelating agent, a chain transfer agent, a chain extender and a water soluble azo-compound are added; the mixture is subjected to polymerization and hydrolysis so as to obtain gel blocks; the gel blocks are processed so as to obtain polyacrylamide powder; and the polyacrylamide powder is mixed with sodium chloride particles so as to obtain the water phase transmission drag reducer. An optimized application concentration of the water phase transmission drag reducer ranges from 250 to 500ppm; compatibility with common bactericides, antiswelling agents and discharge aiding agents is excellent; solution formed by the water phase transmission drag reducer is stable; drag reduction efficiency is high and lasts long; influence of water mineralization degree on preparation of slickwater is less; and the water phase transmission drag reducer is suitable for water with more than 10% calcium chloride.

The invention provides a synthesis process of a sulfonic group containing dirt dispersion agent. The synthesis process comprises the following steps: (1) adding sodium hypophosphite into a kettle residual mixed solution in the process for producing 2-acrylamido-2-methyl propane sulfonic acid, wherein the weight ratio of the mixed solution to the sodium hypophosphite is 90 to (1-2); (2) heating the mixed solution in the step (1), and stopping the heating when the temperature rises to 80 to 85 DEG C; (3) dropwise adding crylic acid and initiator into the mixed solution of the step (2), wherein the weight ratio of the cryic acid to the initiator is 20 to (1-2); (4) maintaining the temperature for 1 to 1.5 hours, and cooling the mixed solution to 45 to 55 DEG C; (5) adding sodium hydroxide of concentration of 50% into the mixed solution of the step (4), adjusting the pH to 3 to 4, and obtaining brownish red clear liquid. By adopting the synthesis process of the sulfonic group containing dirt dispersion agent, the problem for treating the kettle residue after acrylonitrile is distilled and recovered in the process for producing 2-acrylamido-2-methyl propane sulfonic acid or for co-producing N-tert-butyl acrylamide can be solved.

The invention relates to a modifier for a polycarboxylate-type water reducer for concrete and a preparation method of the modifier. The modifier is prepared by polymerizing polyethylene glycol isoamyl allyl ether, itaconic anhydride, t-butyl acrylamide sulfonic acid and crotonic acid unsaturated monomers in the presence of an initiator and a molecular weight modifier in a water solution. The modifier has the advantages that the doping amount is low, the cement adaptability is good, the holding capacity of slump constant of concrete is strong, the cost is low and synthesizing process is carried out at normal temperature. The preparation method of the modifier has the beneficial effects that the process is simple, the energy is saved in a synthetic production process, and the production cost is effectively lowered.

The invention particularly relates to thermally-induced physical cross-linked colored hydrogel and a preparation method thereof. The preparation method comprises the following steps: firstly, by taking N-isopropylacrylamide (NIPAm) as a functional monomer for providing temperature sensitivity for a polymer, taking N-tert-butyl acrylamide (TBA) as a hydrophobic monomer and taking L-N-propionyl phenylalanine (Aphe) as a hydrophilic monomer, carrying out copolymerization by controlling and adjusting the introduction amount of the Aphe, so as to obtain the P (NIPAm-TBA-Aphe) ternary copolymerized nano hydrogel with temperature responsiveness. Then, temperature is adopted to trigger in-situ implementation of a sol-gelation process and keep a bright structural color: the nano hydrogel is heated within a certain temperature range, the concentration range of the nano hydrogel is adjusted, the nano hydrogel is converted from a flowable solution state to a non-flowable macroscopic jelly-like hydrogel state, meanwhile, the hydrogel has the bright structural color, and in addition, the in-situ sol-gel conversion has reversibility.

The invention discloses a silica scale inhibitor, and a preparation method and application thereof. The silica scale inhibitor is formed by performing copolymerization on crylic acid, 2-acrylamido-2-methylpropane sulfonic acid and N-tert-butyl acrylamide, simple in preparation technology and low in production cost, and has an excellent inhibition effect; moreover, the silica scale inhibitor has notoxic and/or side effect on organism, is safe to use, can meet the requirements on silica scale inhibition in the field of industrial circulating cooling water treatment, and is particularly applicable to inhibition of colloid silica scale or silicate scale in a circulating systems, with high silicon content, in raw water or circulating water.

The invention provides a terpolymer nanosphere loaded Ni-B catalyst. The catalyst adopts N-isopropyl acrylamide, 2-acrylamide-2-methyl propanesulfonic acid and n-tert-butyl acrylamide as copolymerized monomers, adopts N,N'-methylene bisacrylamide as a cross-linking agent, and adopts potassium peroxodisulfate as an initiator, and terpolymer nanospheres are synthesized through a soap-free emulsion polymerization method; the nanospheres are dispersed into a nickel sulfate solution for absorbing nickel ions, and adsorbed nickel ions are reduced into nickel metal after centrifuging is performed; the terpolymer nanospheres containing a small amount of nickel metal are dispersed into a nickel plating solution for chemical nickel plating, and the terpolymer nanosphere loaded Ni-B catalyst is obtained. According to the catalyst, raw materials are easy to obtain, the synthesis method is simple, the catalysis efficiency is high, the reaction operation is simple, repeated usage can be achieved, and the terpolymer nanosphere loaded Ni-B catalyst is suitable for catalyzing a sodium borohydride hydrolysis hydrogen production reaction.

The invention discloses an epoxy floor coating with formaldehyde absorption performance and a preparation method thereof. The epoxy floor coating is composed of a component A and a component B, wherein the component A and the component B are mixed according to a mass ratio of 1: (1-2). The component A comprises the following raw materials: 15-20 parts by weight of china clay, 3-5 parts by weight of an adhesive, 1-3 parts by weight of a dispersant, 0.5-1 part by weight of a water-resistant agent, 3-4 parts by weight of anhydrous sodium sulfate, 5-9 parts by weight of N-tert-butyl acrylamide, 2-5 parts by weight of 2-naphthol and 1-3 parts by weight of a rheological modifier. The component B comprises the following components in parts by weight: 10-15 parts of epoxy resin, 2-4 parts of a stabilizer, 6-8 parts of titanium dioxide, 1-3 parts of a rheological modifier, 2-4 parts of methallyl chloride, 5-7 parts of sodium m-aminobenzene sulfonate, 5-7 parts of 2-aminophenol-4-sulfonylaniline and 1-3 parts of a defoaming agent. According to the invention, low-toxicity and pollution-free titanium dioxide is added, so the decomposition efficiency of the product on organic pollutants such as formaldehyde is improved, and the effect that use efficiency is reduced due to the fact that the coating is caked can also be prevented.

The present invention provides an anticorrosive agent which has excellent corrosion prevention especially pit corrosion prevention effect in the non-phosphor and non-metal system, and a corrosion inhibition method by using the anticorrosive agent. The anticorrosive agent includes silicic acid or the salt of the silicic acid and the sulphonic acid system polymer, and includes alkali under the condition of liquefaction. The sulphonic acid system polymer can be at least one of the propenoic acid and 2-acrylamide-2-cymene propanesulfonic acid system copolymer, propenoic acid and isoprene sulphonic acid and 3-allyloxy-2-hydroxy-group propanesulfonic acid system terpolymer, propenoic acid and 2-acrylamide -2-cymene propanesulfonic acid and tert-butyl group acrylamide system terpolymer. In addition, the present invention prevents the corrosion especially the pit corrosion of the object water system by adding effective amount of the anticorrosive agent.

The invention relates to roller type heat exchange equipment. The roller type heat exchange equipment comprises a roller which is horizontally arranged, is supported on a base through a supporting roller, and is rotatably connected relative to the base, a plurality of groups of heat exchange tubes which are horizontally arranged in the roller, and an inlet and an outlet for a heat exchange medium,wherein when the roller is in on a still position, a charge hole is formed in the top of the roller, and a discharge hole is formed in the bottom of the roller; a gas inlet is formed in one side endsurface, in the axial direction, of the roller, and a gas exhaust hole is formed in the other side end surface, in the axial direction, of the roller; sides of each group of heat exchange tubes are hung on the roller wall of the roller, and the other sides of each group of the heat exchange tubes are free ends; the heat exchange tubes extend by certain length in the roller or extend to the other end of the roller from one end of the roller; the inlet and the outlet are formed in the roller; the inlet communicates with ends of each group of heat exchange tubes through branch pipelines arrangedin the roller; and the outlet communicates with a pipeline which is jointed with the other ends of each group of heat exchange tubes. The roller type heat exchange equipment increases a heat exchangearea in the roller, and improves drying efficiency.

The invention relates to the technical field of water treatment, in particular to a low phosphorus scale inhibitor for reverse osmosis membranes for reuse of reclaimed water. The low phosphorus scaleinhibitor is a composition prepared by compounding an acrylic acid-sulfonated styrene copolymer, a methacrylic acid-acrylate copolymer, an acrylic acid-2-acrylamide-2-methacrylic acid-N-tert-butyl acrylamide copolymer and N-xanthogenated chitosan. The low-phosphorus scale inhibitor provided by the invention has good scale inhibition and dispersion effects on the water quality of the reclaimed water, is very excellent in scale inhibition and dispersion effects, can guarantee the normal and efficient operation of a reverse osmosis system, has high adaptability to the complex water quality of thereclaimed water, and can prevent sewage blocking and scaling of the reverse osmosis system in a process of treating the reclaimed water; furthermore, the low-phosphorus scale inhibitor provided by the invention adopts a low-phosphorus formula, and the compounding materials are cheap and easy to obtain, and the preparation is simple. The low phosphorus scale inhibitor can enable the total phosphorus content of the concentrated water to be lower than the requirement of the national standard for the total phosphorus in disposal sewerage, thereby reducing the subsequent treatment cost of an enterprise.

The invention provides a method for producing tert-butyl acryloyl sulfonic acid. The method includes providing of a first external circulation device and a second external circulation device, adding of a first portion of acrylonitrile and a sulfonating agent into the first external circulation device to form a first mixture, and adding of a second portion of the acrylonitrile and isobutylene intothe second external circulation device to form a second mixture; mixing of the first mixture from the first external circulation device and the second mixture from the second external circulation device in a reaction kettle for reacting to produce tert-butylacryloyl sulfonic acid slurry; transferring of the tert-butylacryloyl sulfonic acid slurry to a maturation tank for maturation to produce maturated tert-butylacryloyl sulfonic acid slurry; solid-liquid separation of the maturated tert-butylacryloyl sulfonic acid slurry, and vacuum drying of a separated solid to obtain crude tert-butyl acryloyl sulfonic acid. The method can effectively reduce the formation of by-products and increase production efficiency.