64 results about "Methylenebutanedioic acid" patented technology

The invention provides a super slump type polycarboxylate water reducing agent for bored pile concrete. The water reducing agent is in a liquid state and comprises the following ingredients: sodium oleate, water reducing type polycarboxylate plasticizer, slump type polycarboxylate plasticizer, hydroxyethylidene diphosphonic acid, 2-acrylamide-2-methylpropanesulfonic acid/itaconic acid/acrylic acid terpolymer, hydroxypropyl methyl cellulose or hydroxyethyl methyl cellulose, air entraining agent and triisopropanolamine. The super slump type polycarboxylate water reducing agent for bored pile concrete provided by the invention has the following beneficial effects that by using the super slump type polycarboxylate water reducing agent, the bored pile concrete is good in homogeneity, the static bleeding rate of the bored pile concrete can be generally less than 1%, stable working performance can be maintained within a long time span, meeting the working property of concrete after 0.5-5.0h can be met by adjusting the formulation and dosage and improving the compressive strength ratio of the concrete, and the 28 d strength can be more than 130% of that of benchmark concrete. The invention further provides a preparation method of the super slump type polycarboxylate water reducing agent for bored pile concrete.

Functional silk non-woven wadding is prepared from natural silk, plant resin emulsion and inorganic nano bactericidal. The said emulsion is of self cross-linked anion resin, co-polymerized from acrylic diester, arylonitrile itaconic acid and N hydroxy acrylamide as cross-linking agent. The ratio of emulsion : silk is 100: (1.5-5.0) by dry weight. Silver ion nano bactericidal is also added into the wadding with the ratio of the bactericidal : silk is 100: (0.5-15.0). The product is soft and light, moisture-absorbing and gas permeable, high thermal insulation, elastic, water washing resistance, safety and usable widely.

The present invention is catalytic synthesis process of methyl succinic acid. The present invention adopts Pd/C catalyst and itaconic acid as material to synthesize methyl succinic acid through liquid phase hydrogenation in certain mixed solvent. The reaction is completed at 10-80 deg.c; and the coarse product is purified through re-crystallization inside cold ethyl ether to reach methyl succinic acid content over 99 %. The said preparation process has mild reaction condition, short reaction time, high itaconic acid conversion rate of 98-99 % and high selectivity of 99 %.

The invention discloses polymer water-absorbent resin for diapers and a preparation method thereof. The polymer water-absorbent resin for diapers comprises the following raw materials: bisphenol A type polysulfone resin, polycarbonate, polylactic acid, bamboo charcoal fiber, carbon nano-tube, silane coupling agent KH-560, acrylic acid, N,N-methylene bisacrylamide, potassium persulfate, sodium sulfite, methylene succinic acid, sodium hydroxide, kelp, acrylamide, a modified antibacterial auxiliary agent and a toughening modification auxiliary agent. The polymer water-absorbent resin for diapersis prepared by the steps of preparing a base material, preparing a modified material, and then mixing the base material and modified material. The polymer water-absorbent resin for diapers, provided by the invention, has excellent antibacterial and toughness properties.

The invention discloses an itaconic acid derivant for copolymerization of acrylonitrile. The structural general formula (I) of the itaconic acid derivant is as follows: in the formula (I), R1 is alkyl. The itaconic acid derivant with both ester-base and ammonio is adopted as a comonomer for the acrylonitrile and the conventional ternary polymerization is replaced, so that the controllability of a copolymer is improved. The itaconic acid derivant is used for preparing high-performance PAN raw silks. In the copolymer of the acrylonitrile and the itaconic acid derivant, the mass ratio of the acrylonitrile is within 90 to 99.99%, and the mass ratio of the itaconic acid derivant is within 0.01 to 10%. The number-average molar mass of the copolymer is within 1 to 1 million.

The invention relates to a preparation method for a compound corrosion-inhibiting scale inhibitor, which belongs to the technical field of chemical engineering. According to the preparation method, amino acid as a material is epoxy-modified to add molecular active groups, so that the formation of calcium and magnesium salt can be inhibited, moreover, metal ions are complexed, consequently, a scale inhibition effect is achieved, and the scale inhibitor can also be prevented from being agglomerated; reaction is then carried out with itaconic acid monomer as a material, so that homopolymer is produced, and the two carboxyl groups in the homopolymer which are connected to double bonds can enhance the scale inhibition property, dispersibility and metal corrosion inhibition property of the scale inhibitor; chitosan is then used for coating; when the scale inhibitor gets into water, the chitosan can slowly swell, so that substances therein pass through the holes of the chitosan to get into the water, consequently, the scale inhibitor can be continuously released, and the scale inhibition time is prolonged. The scale inhibitor prepared by the preparation method has a good scale inhibition effect, and also has the characteristic of slow release, so the scale inhibitor does not need to be added in a large amount.

The invention discloses a phosphorus-free water treatment agent, a preparation method for the phosphorus-free water treatment agent, and an application of the phosphorus-free water treatment agent in treatment of circulating water. The phosphorus-free water treatment agent is prepared from dimethyldiallylammonium chloride, unsaturated carboxylic acid and acrylate by polymerization, wherein the phosphorus-free water treatment agent has a limiting viscosity of 0.05 to 0.16 dL/g; the unsaturated carboxylic acid is selected from acrylic acid, maleic acid, methacrylic acid or itaconic acid; and the acrylate is selected from methyl acrylate, ethyl acrylate or hydroxypropyl acrylate. The preparation method for the phosphorus-free water treatment agent comprises the following steps: mixing monomers, an initiator and a molecular weight regulator in a manner of dropwise adding at 50 to 95 DEG C, and after dropwise adding is completed, continuing to carry out a reaction at 75 to 95 DEG C for 1 to 4 h, wherein the monomers are the dimethyldiallylammonium chloride, unsaturated carboxylic acid and acrylate. The phosphorus-free water treatment agent provided by the invention has good scale and corrosion inhibition effects, and has good flocculation effects on suspended matters in the circulating water at the same time.

The invention discloses a tearing strength reinforcing agent for papermaking and a preparation method of the tearing strength reinforcing agent. The method comprises the steps of mixing guar gum, galactomannan gum, cationic starch, polyvinyl alcohol, acetic acid, polyamideimide epichlorohydrin, methylene succinic acid (itaconic acid) and the like, and carrying out compounding, stirring and other steps so as to prepare the reinforcing agent. According to the tearing strength reinforcing agent prepared by adopting the method provided by the invention, the performance is greatly improved, the solid content is 14.5-16.5%, and the viscosity is 20-35 cps; the tearing strength reinforcing agent is added at the wet part, the tearing strength of paper can be greatly improved, and the paper is endowed with good wet strength and dry strength.

The invention belongs to the technical field of adhesives and particularly relates to a paper-plastic compound adhesive. The paper-plastic compound adhesive is prepared from the following components in percentage by weight: 15%-35% of butyl acrylate, 10%-20% of vinyl acetate, 5%-10% of methyl methacrylate, 4%-10% of acrylamide, 1%-5% of methylene succinic acid, 0.1%-1% of sodium hydroxide, 20%-50% of deionized water, 0.2%-2% of an emulsifier, 0.5%-2% of an initiator, 1%-3% of a neutralizing agent and 0.05%-0.2% of aqueous ammonia. The invention further provides a preparation method of the paper-plastic compound adhesive. Compared with the prior art, on the one hand, the added initiator is non-toxic and high in initiation efficiency, and the added neutralizing agent has a relatively small effect on the system stability, so that the prepared adhesive has relatively high stability; on the other hand, the components in the adhesive cooperate with one another, and the adhesive strength of the adhesive is improved.

The invention discloses a phosphorus-free water treatment agent, a preparation method for the phosphorus-free water treatment agent, and an application of the phosphorus-free water treatment agent in treatment of circulating water. The phosphorus-free water treatment agent is prepared from dimethyldiallylammonium chloride and unsaturated carboxylic acid by polymerization, wherein the phosphorus-free water treatment agent has a limiting viscosity of 0.05 to 0.15 dL/g; and the unsaturated carboxylic acid is one or more selected from the group consisting of acrylic acid, maleic acid, methacrylic acid or itaconic acid. The preparation method for the phosphorus-free water treatment agent comprises the following steps: mixing monomers, an initiator and a molecular weight regulator in a manner of dropwise adding at 50 to 95 DEG C, and after dropwise adding is completed, continuing to carry out a reaction at 75 to 95 DEG C for 1 to 4 h, wherein the monomers are the dimethyldiallylammonium chloride and unsaturated carboxylic acid. The phosphorus-free water treatment agent provided by the invention has good scale and corrosion inhibition effects, and has good flocculation effects on suspended matters in the circulating water at the same time.

The invention discloses an anti-static phosgene modified polyacrylonitrile carbon fiber which is characterized by being prepared through the steps of: uniformly mixing 180 parts of acrylonitrile, 10 parts of methyl acrylate and 10 parts of itaconic acid, adding an azo initiator of 1 part of dimethyl 2,2'-azobis(2-methylpropionate) and 1 part of 1-((cyano-1-methylethyl)azo)formamide for carrying out polymerization reaction to produce an polyacrylonitrile base carbon fiber precursor; and modifying the polyacrylonitrile base carbon fiber precursor through COCl2 by adopting an immersion method. An anti-static coating obtained by using the carbon fiber in the invention as an anti-static additive has better tensile property, impact resistance, wear resistance and corrosion resistance, and also has better anti-static property.

The invention discloses a preparation method of superabsorbent resin rich in plant nutrients, belonging to the field of resin production. The preparation method comprises the steps of firstly, pretreating potatoes; then, adding monopotassium phosphate and urea into the potatoes to prepare powder; next, preparing a homogeneous-phase monomer mixed solution from 2-itaconic acid and a crosslinking agent; dissolving the prepared powder into distilled water, pasting under microwave heating, and slowly and dropwise adding the mixed solution after pasting; and finally, dropwise adding an ammonium persulfate water solution into a reaction system to carry out polymerization reaction, and smashing into particles to obtain the superabsorbent resin rich in plant nutrients. Compared with different resins, the superabsorbent resin prepared by using the preparation method not only has favorable water absorption and retention properties, but also is rich in plant nutrients including nitrogen, phosphorus and potassium, can be widely applied to agriculture and forestry aspects and is environmentally friendly; in addition, the preparation method is simple in production process and low in cost.

The invention belongs to the technical field of water treatment and in particular relates to a scale inhibiting-dispersing agent for a reverse osmosis membrane and a preparation method thereof. The scale inhibiting-dispersing agent is characterized by being prepared from the following components in percentage by weight: 10 percent to 45 percent of 2-methylenesuccinic acid-hydroxy-propyl acrylate copolymer, 24 percent to 55 percent of polyepoxysuccinic acid, 10 percent to 35 percent of polyethylene glycol monoallyl ether and 5 percent to 10 percent of 2,4-diaminotoluene. The scale inhibiting-dispersing agent for the reverse osmosis membrane, provided by the invention, is a 8-time concentrated solution; the dosage is effectively reduced and the scale inhibiting-dispersing agent does not contain environmentally harmful components including phosphorus and the like; membrane pollution problems caused by a deposition problem on the reverse osmosis membrane, caused by various types of insoluble salts, can be effectively solved; the invention further provides the preparation method of the scale inhibiting-dispersing agent.

The invention discloses modified calcium carbonate and a preparation method thereof. The modified calcium carbonate is prepared from, by weight, 90-110 parts of calcium carbonate, 6-10 parts of diacetone acrylamide, 8-10 parts of poly(butylene succinate), 6-8 parts of methylene succinic acid, 2-4 parts of disodium methylene dinaphthalene sulfonate, 1-3 parts of dibutyltin maleate, 2-4 parts of polyaluminum chloride, 2-4 parts of mica powder, 4-6 parts of nano TiO2, 5-7 parts of deionized water, and 7-9 parts of both acetyl tributyl citrate and dioctyl terephthalate, wherein the weight part ratio of the acetyl tributyl citrate to the dioctyl terephthalate is 6-8:1. The modified calcium carbonate has good dispersibility and is improved in various mechanical performances, which may be related to the weight part ratio of the acetyl tributyl citrate to the dioctyl terephthalate; when the weight part ratio of the acetyl tributyl citrate to the dioctyl terephthalate is 6-8:1, the modified calcium carbonate has optimum performances.

The invention discloses low-water-absorptivity stone-like coating emulsion and a preparation method thereof, and belongs to the technical field of building coatings. The low-water-absorptivity stone-like coating emulsion is prepared from the following raw materials in parts by weight: 20 to 50 parts of methyl methacrylate, 5 to 20 parts of styrene, 20 to 40 parts of ethylhexyl acrylate, 2 to 5 parts of a functional monomer, 2 to 5 parts of a crosslinking monomer, 2 to 4 parts of an emulsifier, 1 to 3 parts of persulfate and 100 parts of water. The functional monomer is itaconic acid; the crosslinking monomer is at least one of glycidyl methacrylate and allyl methacrylate; the emulsifier is at least one of sodium dodecyl benzene sulfonate and ammonium fatty alcohol epoxy ester sulfate. The low-water-absorptivity stone-like coating emulsion disclosed by the invention has the characteristics of low water absorptivity, water white resistance and high hardness.

The invention discloses a preparation method and application of a grinding and dispersing agent. The preparation method of the grinding and dispersing agent comprises the following steps of dissolving 45 to 85 parts of olefin sulphosalts materials and 30 to 50 parts of itaconic acid into deionized water to form a mixed solution; warming the mixed solution to be 65 to 97 DEG C; dropwise adding a reactant into the mixed solution to react, wherein the reactant is at least one of methacrylic acid, styrene and potassium persulfate; adjusting pH of a reaction product to be 5.5 to 6.8 after fully reacting so as to obtain the grinding and dispersing agent. Through the method, the GCC grinding efficiency can be improved, the ground GCC grain size is smaller, and the granulometric distribution interval is narrower.

The invention discloses a novel power plant cooling water scale inhibitor corrosion inhibitor. The novel power plant cooling water scale inhibitor corrosion inhibitor is prepared from the following raw materials: acrylic acid, methyl acrylate, cis-butenedioic acid, 2-itaconic acid, ammonium persulfate and sodium hydrogen sulfite. Compared with the prior art, the novel power plant cooling water scale inhibitor corrosion inhibitor has the following advantages: in the prior art, the scaling problem of the power plant cooling water system cannot be thoroughly solved, which results in the scaling of the system; the scaling of a power plant steam condenser directly increases the terminal temperature difference and decreases the vacuum degree, and the power generation cost is increased; after anoil cooler is scaled, the temperature of a whole lubricating oil system is high, and the scaling of an air cooler influences the air cooling temperature; the scaling of a cooling tower filler influences the cooling effect of a cooling tower; the problems in the prior art increase the power generation cost of a power plant and influence the operation stability of the power plant; Zhongrui 863 scale-inhibition corrosion inhibitor thoroughly solves the scaling problem of the power plant cooling system, and the power plant cooling system is operated at an optimum state; and the power generation cost is maximally reduced, the stable operation time can be prolonged, and the scales do not need to be cleaned after the power failure.

The invention belongs to the technical field of fertilizers, and discloses a nitrogen fertilizer synergist, a preparation method and application, the nitrogen fertilizer synergist comprises the following components in parts by weight: 15-20 parts of polyaspartic acid, 10-15 parts of 2-methylene succinic anhydride, 5-7.5 parts of acrylamide, 0.2-0.6 part of potassium persulfate, and 800-1200 parts of distilled water; the preparation method of the nitrogen fertilizer synergist comprises the following steps: weighing the raw material components in parts by weight, carrying out a dissolution reaction in a reaction kettle, and fully and uniformly mixing the mixed solution through a constant-temperature vibrator to obtain the nitrogen fertilizer synergist. The effective component polyaspartic acid of the nitrogen fertilizer synergist disclosed by the invention has good ion adsorbability and biodegradability; after being copolymerized with 2-methylene succinic anhydride and acrylamide, the compound is coated on the surfaces of fertilizer particles to form a protective film, so that the volatilization of a nitrogen fertilizer and the leaching and runoff loss of the nitrogen fertilizer can be reduced, the slow release effect of the fertilizer is achieved, the growth and development of crops are promoted, and the yield and the utilization efficiency of the fertilizer are improved.

The invention discloses a method for preparing a dispersing agent for a coating by naphthalenesulfonate wastewater, and belongs to the field of preparation of dispersing agents for coatings. The method comprises the following steps: filtering the naphthalenesulfonate wastewater to remove impurities, mixing and refluxing with itaconic acid, and removing dissolved impurities in the wastewater; reacting with the substances of acetic ether and the like under the action of a palladium catalyst to prepare a coarse dispersing agent for the coating; and adding a surfactant to mix evenly through pH adjustment, so as to prepare the dispersing agent for the coating. The method has the beneficial effects that the preparation method is simple; a hydrophilic group of the obtained dispersing agent for the coating is firmly combined on the particle surface with relatively low polarity or non-polarity; and a lipophilic group has enough carbon chain length, can generate an enough steric-hinerance effect in a water-based dispersion system, and has good solubility and associativity in water.