473 results about "Acrydite" patented technology

A method dewatering thin stillage process streams generated in the processing of grain to ethanol comprising adding to the process streams an effective coagulating and flocculating amount of an anionic copolymer comprising acrylic acid sodium salt, methacrylic acid sodium salt or 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt to form a mixture of water and coagulated and flocculated solids; and separating the water from the coagulated and flocculated solids using a dewatering device.

The invention discloses a comb-type structural reactive polymer with the molecular weight ranging between 1x10<5> and 5x10<6>, wherein the main chain of the reactive polymer is obtained through the copolymerization of acrylamide monomer and functional monomers such as 2-acrylamido-2-methylpropanesulfonic acid and acrylic acid sodium salt, etc., which endues polymer aqueous solution with higher apparent viscosity and better temperature resistance and salt resistance; and the branched chain of the reactive polymer consists of unsaturated macromonomer molecule, which endues the polymer aqueous solution with higher surface activity. The invention also discloses a preparation method for the polymer, comprising the following steps: firstly, through process operation including esterification, prepolymerization and sulfonation, polyurethanes active macromonomer with a novel structure is prepared; then, under the action of oxidation reduction initiator, the copolymerization reaction of the active macromonomer and other functional micromolecule monomers is initiated quickly at low temperature. The comb-type structural reactive polymer can be used as oil displacement agent and has the advantages of high molecular weight and low surface tension, etc.

A conductive composition comprises a π conjugated conductive polymer, a dopant composed of polyanion, and at least one crosslinking site forming compound selected from (a) compounds having a glycidyl group and (b) compounds having a hydroxyl group and one selected from the group consisting of allyl, vinyl ether, methacryl, acryl methacrylamide, and acrylamide groups. An antistatic coating material comprises a π conjugated conductive polymer, polyanion, at least one crosslinking site forming compound selected form the above (a) and (b), and a solvent. An antistatic coating is formed by applying the above-mentioned antistatic coating material. In a capacitor comprising an anode composed of a valve metal porous body; a dielectric layer formed by oxidizing the suds of the anode; and a cathode formed on the dielectric lays, the cathode has a solid electrolyte layer formed by crosslinking complexes of a π conjugated conductive polymer and a dopant composed of a polyanion.

The invention discloses a novel acidified fractured thickening agent and a preparation method thereof, and belongs to the field of macromolecular synthesis. The thickening agent is prepared by the method comprising the following steps: adopting a water solution polymerizing method, oxidizing and reducing an evocating agent, adding proper amount of chain extender into a sealed system, and copolymerizing the mixture by the reaction of methacryloyloxy trimethyl-ammonium chloride (DMC), acrylamide (AM) and 2-acrylamido-2-methyl propane sulfonic acid (AMPS). The thickening agent has the advantages of acid resistance and high temperature resistance, has favorable thickening effect, and is applied to the fields of acidified fracturing construction, strengthening oil extraction work and the like in petroleum extraction.

The hair treatment composition contains a combination of an anionic polysaccharide, a second homopolymer or copolymer, which is built up from acrylamidoalkylsulfonic acids, methacrylamidoalkylsulfonic acids, or their salts, and a third polymer, which is an amphiphilic polymer. Preferably the hair treatment composition is a hair styling gel containing xanthan as a first polymer, ammonium acryloyldimethyltaurate/vinylpyrrolidone copolymer as a second polymer and, as a third polymer, cross-linked copolymers made from (meth)acrylic acid and C₁₀- to C₃₀-alkyl esters of (meth)acrylic acid. The preferred gel has a shaky pudding-like consistency and is suitable as a 2-in-1 gel that can be used as either a hair styling gel for increasing hairstyle volume or as a finishing gel for structuring a hairstyle.

A shaped body of detergent composition comprising a chemically and/or physically cross-linked dissolution retarding agent, and at least one of a surfactant and/or builder. The dissolution retarding agent is preferably a copolymer of N-vinylpyrrolidone, 2-acrylamido-2-methylpropanesulfonic acid and a cross-linking agent, or a salt thereof. The shaped bodies dissolve predominantly in the main wash of an automatic washing process and do not dissolve significantly in the pre-wash and are of particular application in automatic dishwashing.

The invention discloses an ethers early strength type polycarboxylate water reducer and a preparation method thereof. The water reducer regards unsaturated esters, N,N-bis(2-hydroxyethyl)isopropanolamine (DIEPA), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), methyl allyl polyoxyethylene polyoxypropylene ether (TPEG) and the like as main chemical synthesis raw materials, and the main chemical synthesis raw materials are subjected to amidation and copolymerization in certain conditions under the action of a catalyst, an initiator, a chain transfer agent and the like, so that a high-molecular polymer with an amphoteric structure is obtained. The molecular structure of the water reducer comprises hydrophilic hydroxyl, hydrophilic carboxyl, hydrophilic acylamino, hydrophilic sulfonyl, hydrophobic carbon chains and a polyoxyethylene polyoxypropylene ether long-chain structure with certain stereo-hindrance effects, wherein an N containing group can improve early strength of concrete obviously. Therefore, the ethers early strength type polycarboxylate water reducer is applicable to pre-cast concrete components which need improvement of early strength.

A composition, in the form of a water-in-oil emulsion, is characterized in that it contains at least one amphiphilic polymer or copolymer of 2-acrylamido-2-methylpropanesulphonic acid bearing hydrophobic grafts chosen from hydrocarbon-based radicals containing from 6 to 30 carbon atoms, oxyalkylenated hydrocarbon-based radicals comprising a hydrocarbon-based group containing from 6 to 30 carbon atoms and at least one oxyalkylene unit, and mixtures thereof.

The invention relates to a multicomponent copolymerization oil well cement fluid loss additive and a preparation method thereof. The method comprises: 10-120 portions of 2-acrylamide-2-methyl-1-AMPSA, 1-5 portions of acrylic acid and 15-50 portions of deionized water are added, stirred and then added with sodium hydroxide aqueous solution with the mass fraction of 5-10 percent for neutralizing to pH equal to 3-11; then 10 portions of acrylamide, 0.1-1 portion of complexing agent EDTA and 0.01-1 portion of chain transfer agent are added, the chain transfer agent is isopropyl alcohol or sodium benzoate, the temperature is controlled between 30 DEG C and 60 DEG C and N2 is introduced for 30 minutes; 2-10 portions of N-vinyl pyrrolidone and 0.01-0.5 portion of initiator are added, the initiator is potassium persulfate or ammonium persulfate, and the reaction is carried out for 4-12 hours. The solution keeps still for 5 hours at the temperature of 180 DEG C, and is cooled through flowing water after being taken out, without sedimentation or water separating; and the water loss is zero at the temperature of 180 DEG C according to the standards of drilling fluid, and the water loss is 48ml according to the standards of cement.

A method of dewatering corn stillage solids comprising adding to the solids an effective coagulating and flocculating amount of an anionic copolymer comprising acrylic acid sodium salt, methacrylic acid sodium salt or 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt to form a mixture of water and coagulated and flocculated solids; and separating the water from the coagulated and flocculated solids using a dewatering device.

A method dewatering thin stillage process streams generated in the processing of grain to ethanol comprising adding to the process streams an effective flocculating amount of an anionic copolymer comprising acrylic acid sodium salt, methacrylic acid sodium salt or 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt to form a mixture of water and flocculated solids; and separating the water from the flocculated solids using a dewatering device.

The invention relates to a method for synthesizing a chemical substance, in particular to a production method for 2-acrylamide-2-methyl propyl sulfonic acid. The method comprises the following steps that: A) firstly, 150 to 180 weight portions of acrylonitrile is added into a reactor, then 30 to 50 weight portions of sulfuric acid with the concentration of between 95 and 100 percent is stirred and synchronously added into the reactor, isobutene is aerated when the adding amount of the sulfuric acid is up to between 15 and 25 percent of the total amount, the reaction temperature is controlled between 10 and 40 DEG C, the produced pasty product is cooled to the room temperature and is separated and dried by a centrifuger to obtain a crude product of 2-acrylamide-2-methyl propyl sulfonic acid. The method adds an organic sulfonate during the reaction, which not only suppresses secondary reactions but also makes the product have larger crystal size with easy centrifugal separate, is convenient to realize the industrial production, and has high purity and yield.

Matrix controlled diffusion drug delivery systems comprising a therapeutically effective amount of one or more pharmaceutically active agents polymerized with a monomeric mixture comprising one or more acrylate ester and/or methacrylate ester-containing monomers and one or more acrylamido-containing monomers are provided. Processes for their preparation and methods of use are also disclosed.

An aqueous ink composition including: a water-soluble polymerizable compound containing two or more polymerizable functional groups each selected from the group consisting of a (meth)acrylamide group, a maleimide group, a vinyl sulfone group, and an N-vinyl amide group, wherein a ratio of a molecular weight of the compound relative to a number of the polymerizable functional groups contained in a single molecule of the compound is 175 or less; a polymerization initiator; and water.

The invention discloses a preparation method of a thickener used for self-compact concrete. The method comprises the following steps: 1, weighing 2-acrylamide-2-methylpropanesulfonic acid and acrylic acid in proportion, processing to prepare an aqueous solution, and adjusting the pH value to 6.5-7.0; 2, adding a prepared monomer acrylamide solution with the concentration of 25-35% while stirring, uniformly stirring, dumping the obtained mixed solution into a flask, carrying out constant temperature water bath, and introducing nitrogen for protection; and 3, adding an initiator in a dropwise manner when the reaction temperature rises to 30-40DEG C, carrying out heat insulation at 40DEG C, carrying out a stirring reaction for about 1.5-2h, stopping the introduction of nitrogen when reactants are a viscous liquid, and carrying out constant temperature slaking for a period of time to obtain a white transparent colloid which is the thickener. The thickener obtained in the invention is used for preparing the self-compact concrete, has a good water solubility and a good thickening effect, can effectively improve the plastic viscosity of the self-compact concrete, and solves the water segregation and separation problems of the self-compact concrete.

Conductive compositions whose electrical properties do not change significantly due when stored open to the atmosphere, methods for preparing the compositions, and medical electrodes that comprise the compositions are disclosed. The compositions are hydrogels that comprise about 33 wt % to about 68 wt % of a humectant or a mixture of humectants; about 1 wt % to about 8 wt % of an electrolyte or mixture of electrolytes; about 6 wt % to about 20 wt % of water; about 18 wt % to about 45 wt% of a copolymer. The copolymer comprises, in polymerized form, about 80 mol % to about 95 mol % of a first monomer, which is a mixture of acrylic acid and a salt thereof, about 5 mol % to 20 mol % of a second monomer. preferably a salt of 2-acrylamido-2-methylpropane sulfonic acid, and, optionally a crosslinking agent. The conductive composition has a pH of about 7.0 or less.

the invention discloses a acrylamide crosslinking copolymer emulsion with 35-44% acrylamide crosslinking copolymer and water and preparing method in the reversed phase emulsion-typed macromolecular thickener of cosmetic, drug and ink industry, which comprises the following steps: blending acrylamide and 2-acrylamide-2-methanesulfonic acid; adding adjuvant to mix with oil phase; adding emulsifier of water-in-oil type and adjuvant emulsion; adding emulsifier of the oil-in-water type to obtain the product.

A cosmetically acceptable composition for treating skin comprising about 0.1 to about 20 weight percent, based on polymer solids, of an anionic polymer composed of from about 10 to about 80 mole percent of 2-acrylamido-2-methyl-1-propanesulfonic acid or a base addition salt thereof and from about 90 to about 20 mole percent of one or more anionic or nonionic monomers.

The invention belongs to a heat-resistant oil well cement fluid loss additive and a preparation method thereof. The invention is characterized in that the method adopts industrial raw materials of acrylamide and 2-acrylamide-2-methyl-1-AMPSA to carry out copolymerization with N-vinyl pyrrolidone; firstly 10-120 portions of 2-acrylamide-2-methyl-1-AMPSA and 15-50 portions of deionized water are added into a reactor with an agitator and a thermometer, agitated and then added with sodium hydroxide aqueous solution with the mass fraction of 5-10 percent for neutralizing to pH equal to 3-11; then 10 portions of acrylamide, 0.1-1 portion of complexing agent EDTA and 0.01-1 portion of chain transfer agent are added, the chain transfer agent is isopropyl alcohol or sodium benzoate, the temperature is controlled between 30 DEG C and 60 DEG C and N2 is introduced for 30 minutes; 2-10 portions of N-vinyl pyrrolidone and 0.01-0.5 portion of initiator are added, the initiator is potassium persulfate or ammonium persulfate, and the reaction is carried out for 4-12 hours to obtain the oil well cement fluid loss additive. The method has simple preparation. The prepared high-temperature resistant spacer fluid keeps still for 5 hours at the temperature of 180 DEG C, and is cooled through flowing water after being taken out, without sedimentation or water separating; and the spacer fluid keeps still for 15 hours at the temperature of 200 DEG C, and is cooled through flowing water after being taken out, without sedimentation.

Matrix controlled diffusion drug delivery systems comprising a therapeutically effective amount of one or more pharmaceutically active agents entrapped in a copolymer which is a reaction product of a monomeric mixture comprising one or more acrylate ester and/or methacrylate ester-containing monomers and one or more acrylamido-containing monomers are disclosed. Also disclosed are processes for their preparations and methods for their use.

The invention discloses a preparation method of quick-response glucose-sensitive hydrogel which is quick in response to glucose stimulation in a physiological environment. The preparation method particularly includes adding acrylamidophenylboronic acid and acrylic acid amino ester, N-alkyl acrylamide and acrylamide or methacrylamide and N,N'-methylenebisacrylamide into an alkaline macromolecule aqueous solution, and stirring to dissolve completely so as to obtain a mixed solution; adding catalytic reaction accelerators tetramethylethylenediamine into the mixed solution with uniformly mixing; adding initiators accounting for 0.03-0.3% of monomer mass, into the obtained solution, and conducting room temperature reaction to obtain the hydrogel containing a macromolecular copolymer shown as structural formula (I). Alkaline macromolecules in the preparation method are a macromolecule component containing amino or partially containing lactam group and can enhance glucose sensitivity and responsiveness of the hydrogel in the physiological environment by being added, so that stability in use of the hydrogel is improved.