38 results about "Diethylenetriamine" patented technology

This invention provides a quadruple ion-coupled erosion-protected concrete and its preparation method, relating to the field of special concrete materials technology. The concrete comprises basic components and functional admixtures. The basic components include cementitious materials, aggregates, and water. The functional admixtures include a coupling ion locking agent, a dual-interface film-forming aid, and a salt-expansion-resistant crack-resistant agent. The coupling ion locking agent includes calcined calcium aluminum hydrotalcite and diethylenetriamine pentacarboxylate; the dual-interface film-forming aid includes isobutyltriethoxysilane and lithium silicate; and the salt-expansion-resistant crack-resistant agent includes calcium sulfoaluminate expansion agent and lightly calcined magnesium oxide. The three admixtures work synergistically from three dimensions: active ion solidification, in-situ interface shielding, and full-cycle volume compensation, achieving simultaneous solidification of the four erosion ions, continuous blocking of penetration channels, and effective offsetting of salt crystallization expansion stress. This ensures the long-term safe service of the concrete under extreme conditions of high water pressure, high humidity, alternating wet and dry conditions, and multi-ion coupling erosion.

This invention discloses a solid sodium aminosulfonate β-H elimination promoter, its preparation method, and its application, relating to the technical field of β-H elimination promoters. The technical solution is as follows: S1, diethylenetriamine is dissolved in an organic solvent; S2, chlorosulfonic acid organic solution is added dropwise to the diethylenetriamine organic solution at 0-10℃ to carry out the reaction; after the addition is complete, the temperature is raised to continue the reaction; S3, the white solid generated by the reaction is filtered and washed with chloroform and ethanol respectively. The washed white solid is poured into anhydrous methanol and dispersed evenly. The reaction temperature is lowered to 0℃, sodium hydroxide is added for neutralization, and the solvent is removed by vacuum distillation. The resulting pale yellow solid is washed with ethanol and finally dried under vacuum to obtain the solid sodium aminosulfonate β-H elimination promoter. The solid sodium aminosulfonate β-H elimination promoter prepared by this invention has advantages such as high metal salt content, strong alkalinity, and easy separation, making it a promising additive for industrial application.

Disclosed is a novel room-temperature curable bio-based epoxy vitrimer with a simple design of the chemical structure. A hempseed oil-derived glycidyl ester type epoxy (HOEP) was synthesized and then blended with a bisphenol A epoxy (DER331) to manipulate the properties of the resulting vitrimer s. An aliphatic amine hardener, diethylenetriamine (DETA), was selected as hardener to realize the room temperature curing in presence of triethanolamine (TEOA) as the catalyst. Unlike the traditional glycidyl ether epoxy-amine the thermosets which are based on sable C—N and ether linkages, the epoxy vitrimer herein includes ester bonds with HOEP and hydroxyls formed from the reaction of amine and epoxy in its cross-linked network. Dynamic transesterification (DTER) between the ester bonds and hydroxyls take place at elevated temperatures, imparting the vitrimer significant stress relaxation behavior and repairability. This provided a viable method to produce room temperature curable epoxy vitrimer s.

The application discloses a production system and method of an epoxy chloropropane modified wet strength agent, and belongs to the technical field of biomass conversion. Corn stalks are used as biomass raw materials, components are separated through eutectic solvent pretreatment, bio-based monomers are prepared through enzymatic saccharification and directional fermentation of cellulose components, and bio-based polyester PEFF particles are obtained through melt polycondensation. Then, diethylenetriamine and bio-based adipic acid are used to prepare a polyamide polyamine prepolymer, and the polyamide polyamine prepolymer and the PEFF particles are used to prepare a PAA-co-PEFF composite prepolymer aqueous solution through ester-amide exchange reaction. Then, the composite prepolymer and pretreated epoxy chloropropane are used to perform controllable crosslinking reaction, and after thin film evaporation and deep dechlorination through a double-tower series fixed bed adsorption tower, the product is finally obtained through oxidation coupling and graft modification with tannin extract, pH adjustment, dilution and filtration.

This invention discloses a low-VOC environmentally friendly interior wall coating composition and its preparation method in the field of architectural coatings technology. The method involves mixing deionized water, diethylenetriamine-terminated hyperbranched polyglycerol-grafted polypropylene glycol diglycidyl ether star copolymer, and polyether-modified polysiloxane. Titanium dioxide, calcined kaolin, heavy calcium carbonate, and talc are then added and ground to obtain a pigment and filler slurry. Next, styrene-acrylic emulsion, acrylic emulsion, and a mixture containing N-(diaminoethyl)-aminopropylmethyldimethoxysilane-modified glycidyl methacrylate-polyetheramine-epoxy soybean oil ring-opening copolymer and methyl isobutyl ketone are added. After stirring, the pH is adjusted to 8.0-9.5 using an associative polyurethane thickener and aminomethylpropanol. Polyether-modified polysiloxane and benzisothiazolinone are then added, followed by degassing to obtain the final product. This coating has extremely low volatile organic compound content and exhibits excellent formaldehyde removal, scrub resistance, and dispersion stability.

A method for preparing diethylenetriamine crosslinked liquid polybutadiene rubber is disclosed. The crosslinked rubber prepared by this invention uses polybutadiene as the main chain and diethylenetriamine as the crosslinking agent. The primary amine groups on the diethylenetriamine molecule react with aldehyde groups to form imine bonds, and the secondary amine groups react with aldehyde groups to form enamines. The preparation process involves: firstly, oxidatively cracking cis-butadiene rubber to prepare aldehyde-terminated polybutadiene; then, adding diethylenetriamine at a mass ratio of 0.03–0.1:1 to the aldehyde-terminated polybutadiene, and preparing the crosslinked rubber using the above reaction. The mixture of diethylenetriamine and aldehyde-terminated polybutadiene can be crosslinked at room temperature, exhibiting low energy consumption and high reactivity, overcoming the problems of complex crosslinking processes or high energy consumption caused by traditional crosslinking rubber using sulfur or peroxides. This rubber possesses self-healing and reusable properties, overcoming the problems of traditional crosslinked rubbers being non-self-healing and non-recyclable.

This application provides a silicone-modified waterborne polyurethane and its preparation method. The preparation method includes the following steps: Hydroxyl-terminated polyether-modified silicone oil and isoflurane diisocyanate are placed in a container, and the temperature is raised to 80-90℃ and maintained for 1.5-2.5 hours; then polytetrahydrofuran and diphenylsilanediol are added sequentially, and the temperature is raised to 85-95℃ and reacted for 2.5-3.5 hours until the -NCO content is close to or reaches the theoretical value, at which point the reaction is stopped to obtain a prepolymer; then the temperature of the prepolymer is lowered to below 40℃, acetone and triethylamine are added, and the reaction is carried out for 3-5 minutes; then the product is transferred to a reaction vessel containing an appropriate amount of deionized water and defoamer and stirred evenly to form an emulsion; finally, a mixture of deionized water, diethylenetriamine, and ethylenediamine is added for emulsification to obtain the silicone-modified waterborne polyurethane.

This application discloses a waterborne polyurethane adhesive, its preparation method, and its application, relating to the field of adhesives. The waterborne polyurethane adhesive comprises the following raw materials in parts by weight: 20-30 parts of poly(1,4-butanediol adipate), 4-9 parts of castor oil, 2.4-5.6 parts of polyether-modified aminosilane, 20-30 parts of isophorone diisocyanate, 0.06-0.18 parts of a first catalyst, 3-5 parts of 2,2-dimethylolpropionic acid, 0.29-0.62 parts of tartaric acid, 2-4 parts of triethylamine, and 2.2-3.9 parts of diethylenetriamine. This application adds polyether-modified aminosilane during the polymerization stage and diethylenetriamine after emulsification, which effectively improves the surface drying time and peel strength of the waterborne polyurethane adhesive.

The present application belongs to the technical field of sewage treatment, and particularly relates to a composite microbial agent for sewage treatment and a preparation method thereof. The composite microbial agent is prepared by using composite biomass material and tetraethoxysilane as raw materials, high-density biochar material obtained by one-step pyrolysis and acid modification, iron-modified high-density biochar material obtained by modifying the high-density biochar material with ferric chloride hexahydrate and secondary pyrolysis, and solidification carrier obtained by grafting amino groups on the surface of the iron-modified high-density biochar material through affinity ring-opening reaction and amination reaction with epoxy chloropropane and diethylenetriamine as reactants. The solidification carrier is added into a composite microbial suspension, and the composite microbial agent is obtained after standing and shade drying. The present application can improve the density and mechanical strength of the solidification carrier by adding tetraethoxysilane, so that the solidification carrier can be prevented from being washed away quickly in the water treatment process, and the effect is better.

The application discloses a solid phase carrier for primer synthesis and a preparation method thereof, and belongs to the technical field of polymer microspheres, and the preparation method comprises the following steps: in the first step, a double-end epoxy silane and diethylenetriamine are added into isopropyl alcohol, and stirring reaction is carried out; after the reaction is completed, vacuum distillation is carried out to obtain an end-amino hyperbranched polymer; in the second step, chloromethylated polystyrene microspheres are added into toluene to be swelled, then the end-amino hyperbranched polymer is added to carry out stirring reaction, after the reaction is completed, ethanol extraction is carried out, and vacuum drying is carried out to obtain the solid phase carrier. According to the method, the end-amino hyperbranched polymer is grafted on the surface of the polystyrene microspheres to form the solid phase carrier, the method is controllable, the loading capacity is high, the universality is good, the stability is strong, the existing industrial conventional equipment can be directly used for large-scale and batch production, and the reproducibility is strong.

The invention is directed to a manual dishwashing cleaning composition comprising an anionic surfactant; an amphoteric surfactant; citric acid (salt) as a builder; diethylenetriamine penta(methylene phosphonic acid (DTPMP) as a chelator; and a carbonate as an alkalinity booster. The manual dishwashing cleaning composition exhibits improved grease removal.

A filtration membrane includes a polysulfone (PFS) membrane support, and a crosslinked polyamide layer disposed on the PFS membrane support. The crosslinked polyamide layer includes a network formed by polycondensation between diethylenetriamine and trimesoyl chloride, and graphene oxide (GO) nanosheets covalently bonded to the network via a linking spacer. The linking spacer includes a backbone chain having at least 8 backbone atoms. The backbone chain has a plurality of amine groups including —NH— and —NH2, and the linking spacer is bonded to the graphene oxide nanosheets via a —Si—O— bond and bonded to the network via reactions between trimesoyl chloride and the plurality of amine groups. A filtration method includes filtering a mixture including water and an organic molecule through the filtration membrane to generate a water permeate.

This invention relates to the field of fabric finishing agents, and more particularly to a durable hydrophilic softening agent for irregularly shaped cross-section nylon fabrics and its preparation method. The aforementioned durable hydrophilic softening agent for irregularly shaped cross-section nylon fabrics comprises, by weight, the following raw materials: 10-15 parts adipic acid, 5-10 parts hexamethylenediamine, 1-5 parts amino-terminated polyamide amine, 10-30 parts polyether amine 400, 0.1-0.5 parts catalyst A, 30-50 parts double-terminated epoxy polyether silicone oil, 1-5 parts polyether amine 900, 0.1-1 part diethylenetriamine, 1.1-4 parts glacial acetic acid, 5-15 parts surfactant, 10-20 parts polyethylene glycol, 1-5 parts hexamethylene diisocyanate, 0.01-0.1 parts catalyst B, 1-5 parts 2-acrylamido-2-methylpropanesulfonic acid, 1-3 parts dicyandiamide, and 1-5 parts amino silicone oil. This invention has outstanding softness, good elasticity, hydrophilicity, and washability.

This invention relates to a low-temperature, fast-drying modified phenolic amine curing agent, its preparation method, and its application. The raw material components of this low-temperature, fast-drying modified phenolic amine curing agent consist of a phenol source, an amine source, an aldehyde source, a modifier, and a solvent. The phenol source includes cashew phenol and phenol; the amine source is selected from one or more of triethylenetetramine, diethylenetriamine, and isophorone diamine; the aldehyde source is formaldehyde solution; the modifier is a silane coupling agent; and the solvent is selected from one or more of xylene, n-butanol, and propylene glycol methyl ether. This low-temperature, fast-drying modified phenolic amine curing agent, its preparation method, and its application have the advantages of low-temperature, fast drying, promotion of nano-ceramic dispersion, and a wide applicable temperature range.

Citrate has been used as an anticoagulant because of its calcium chelation capability, but it may have unwanted off target metabolic and inflammatory effects; accordingly, alternative anticoagulants may have benefits compared with citrate. Diethylenetriamine pentaacetic acid (DTPA) is an octadentate chelator that is FDA-approved to treat plutonium, americium, and curium exposure by chelation. In this disclosure, it is demonstrated that a composition comprising DTPA, DPDA-1, functions effectively as an anticoagulant for the storage of whole blood, with an increased platelet count and improved viscoelastic properties compared with citrate composition, although DTPA-composition requires half of the amount of calcium to restore clotting function, which suggest DTPA composition's lowering the risk of post transfusion hypocalcemia in comparison to citrate transfusion. Therefore, DTPA-composition is presented here as an anticoagulant to preserve platelets.

The application discloses a grafted modified PAE resin crosslinking agent, a binary system soybean meal adhesive and application thereof, and belongs to the field of adhesives and artificial boards. A preparation method is as follows: first, polyamide is prepared by condensation of adipic acid and diethylenetriamine; then, the PAE resin is synthesized by step-by-step reaction of the polyamide and epichlorohydrin; finally, the target crosslinking agent is obtained by grafting modification of the PAE resin under catalysis of p-toluenesulfonic acid and in the presence of acrylic acid. The crosslinking agent is compounded with soybean meal powder, water and water-soluble cellulose derivatives to obtain the binary system soybean meal adhesive. By introducing active groups into the molecular chain of the PAE resin, the crosslinking density and hydrophobicity of the soybean meal protein are remarkably enhanced, and the water-resistant bonding strength of the adhesive is fundamentally improved. Meanwhile, the modified resin and the cellulose derivatives are synergistic, the water retention, rheological properties and wetting and spreading properties of the adhesive on wood are effectively improved, the sizing process and pre-pressing effect are optimized, and the quality of the board is more uniform, and the application is more suitable for industrial production requirements.

This invention provides a self-healing triboelectric nanogenerator, its preparation method, and its application. The preparation method includes: polymerizing dimer acid and diethylenetriamine while adding zinc oxide to obtain a self-healing PA film with high tensile strength; dispersing conductive carbon black in the self-healing PA without zinc oxide to obtain a first electrode material, and hot-pressing it with the self-healing PA film to obtain a self-healing PA positive triboelectric layer with an integrated electrode; condensing aminopropyl-terminated PDMS with isophorone diisocyanate and terephthalaldehyde to obtain a self-healing PDMS film; dispersing conductive carbon black in the PDMS to obtain a second electrode material, and hot-pressing it with the self-healing PDMS film with a small amount of carbon black to obtain a self-healing PDMS negative triboelectric layer with an integrated electrode; the assembled triboelectric nanogenerator has high output performance, good cycle stability, and intrinsic self-healing capability and self-powering characteristics.

The application belongs to the technical field of oil exploitation, and particularly relates to an iron ion stabilizer for oil field acidification and a preparation method thereof. The iron ion stabilizer for oil field acidification is composed of the following raw materials in percentage by weight: 0.1-0.3% of polymeric carboxylic acid, 0.1-0.3% of diethylenetriamine penta-methylene phosphonic acid, 0.05-0.1% of gluconic acid, 0.02-0.05% of isoascorbic acid, and the balance of water. The structural formula of the polymeric carboxylic acid is as follows: wherein n is a natural number greater than 2. The iron ion stabilizer has the advantages of strong iron ion stabilizing capacity and high temperature resistance. The highest iron ion stabilizing capacity at room temperature reaches 242 mg / ml, and the highest iron ion stabilizing capacity after constant temperature at 120 DEG C for 4 hours reaches 238 mg / ml.

The application relates to a kind of nano microporous insulating board vacuum assisted press forming method and mould, specific steps include, S1, preparation composite glass fiber cloth bag: organic silicon modified epoxy resin, hydrophobic nanometer silicon dioxide, diethylenetriamine, amino silane coupling agent, polyethylene glycol and acetone are mixed uniformly, coating slurry is prepared, glass fiber cloth bag is immersed in coating slurry, and composite glass fiber cloth bag is obtained;S2, composite powder preparation: gas phase silicon dioxide, sunscreen and high silica fiber are mixed and stirred, and nano microporous composite powder is obtained;S3, positioning overturn press forming mould;S4, cloth bag vertical flat spread;S5, loading seal;S6, mould frame overturning;S7, mould pressing forming.The nano microporous insulating board with high flatness, no wrinkle, uniform edge core density and excellent heat insulation performance is prepared by the synergistic effect of the microporous coating structure of the composite glass fiber cloth bag and the vacuum assisted press forming process.

The application provides a Sn58Bi low-temperature soldering tin ball surface treatment agent and a preparation method thereof, and relates to the technical field of metal surface treatment.The Sn58Bi low-temperature soldering tin ball surface treatment agent is composed of tin ball activators (diethylenetriamine pentaacetic acid and ethylenediamine tetraacetic acid), a film forming agent, a surfactant, a dispersing agent, an antioxidant, a defoaming agent, a stabilizer, a preservative, deionized water and the like.The surface treatment agent can effectively improve the soldering reliability of the Sn58Bi soldering tin ball, prolong the service life of the soldering tin ball, has good oxidation resistance and corrosion resistance under the premise of not affecting the soldering performance, and is suitable for various complex working environments.Meanwhile, the preparation process of the Sn58Bi low-temperature soldering tin ball surface treatment agent is simple, convenient to use, has good physical stability after film forming, can avoid oxidation and the invasion of pollutants during long-term storage of the soldering tin ball, and improves the quality of the soldering tin ball.

This invention relates to the field of antique building material preparation technology, specifically to an antique building material and its preparation method. The raw materials, calculated as 100 parts in total, include 35 parts of cedar wood powder, 28 parts of epoxy resin E51, 12 parts of bamboo fiber powder, 10 parts of heavy calcium carbonate, 5 parts of diethylenetriamine, 3 parts of coupling agent KH-550, 2 parts of antioxidant 1010, and 3 parts of polysulfide rubber. The method includes the following steps: S1, raw material pretreatment stage; S3, molding stage; S4, post-treatment stage. This invention uses natural cedar wood powder and bamboo fiber powder as core raw materials, realizing the resource reuse of agricultural and forestry waste, reducing dependence on non-renewable resources, and possessing both environmental value and resource recycling significance. The raw materials contain no harmful chemical additives, and all components meet relevant safety standards. During processing, sealed equipment and dust collection devices reduce pollutant emissions, and the finished product has minimal environmental impact after disposal, meeting the needs of green production and sustainable development.

This invention provides a diesel anti-wear agent and its preparation method, belonging to the technical field of diesel additives. The method includes the following steps: mixing and stirring diisooctyl maleate and xylene, adding diethylenetriamine and deionized water, heating and reacting, adding toluene, 4-(aminomethyl)pyridine, and ethylene oxide, mixing and reacting to obtain pyridinium-based polyester hollow capsules; mixing xylene, catechol, ethylenephosphonic acid, ammonium persulfate, and deionized water, heating, dispersing in cyclohexane, adding polyvinyl alcohol, octadecyl methacrylate, and azobisisobutyronitrile, mixing and reacting to obtain catechol phosphonate nanoparticles; mixing and stirring fatty acid ester solution, oleoyl fluorocarbon copolymer, and pyridinium-based polyester hollow capsules, adding catechol phosphonate nanoparticles, continuously stirring, sonicating, and degassing to obtain the diesel anti-wear agent. This invention can improve the anti-wear and deemulsification properties of diesel anti-wear agents.

This invention provides a method for preparing a magnetic hydrothermal biochar-based heavy metal adsorbent material, belonging to the field of environmental functional materials technology. It selects inexpensive, renewable, and easily modifiable natural biomass as raw material, and obtains a magnetic porous carbon framework through one-step hydrothermal carbonization. Then, epoxy groups are introduced using green electron beam radiation grafting technology. Finally, high-density amino functional groups are grafted onto the surface of the magnetic hydrothermal biochar through a dual-amino synergistic ring-opening reaction involving small-molecule polyamines with any one of ethylenediamine (EDA), triethylenetetramine (TETA), polyethyleneimine (PEI), and diethylenetriamine (DETA). The prepared adsorbent material possesses high adsorption capacity, rapid adsorption kinetics, and convenient magnetic separation and recovery performance, effectively solving the bottleneck problems of insufficient adsorption performance and difficulty in recovery of existing biomass adsorbents.

A process for manufacturing diethylenetriamine (DETA) and / or monoethyleneglycol (MEG) from a mixture comprising diethylenetriamine (DETA) and monoethyleneglycol (MEG), the process comprising the steps of: (i) providing a feed stream comprising DETA and MEG; (ii) separating the feed stream provided in step (i) in a first distillation column DC1 into: a. a fraction A comprising DETA; and b. a fraction B comprising an azeotropic composition of DETA and MEG; (iii) separating fraction B obtained in step (ii) in a second distillation column DC2 into: c. a fraction C comprising MEG; and d. a fraction D comprising an azeotropic composition of DETA and MEG.

The application provides an absorbent for simultaneous capture of sulfur dioxide and carbon dioxide, and a method for capturing sulfur dioxide and carbon dioxide in flue gas. The absorbent comprises deionized water, an alcohol amine compound and an activator, wherein the alcohol amine compound is one or more of N-methyldiethanolamine, monoethanolamine, diethanolamine and triethanolamine, and the activator is at least two of diethylenetriamine, triethylenetetramine, dihydroxyethylpiperazine and piperazine. The special type of alcohol amine compound and the special type of activator are used to enable the absorbent to simultaneously absorb sulfur dioxide and carbon dioxide in the process of treating flue gas, both of which have high absorption efficiency, and the enriched carbon dioxide and sulfur dioxide can be desorbed to obtain carbon dioxide gas and sulfur dioxide gas, respectively. Based on the absorbent, the production efficiency is improved, the equipment investment is saved, and the absorbent has good industrial application prospect.

The application provides a polyurea-based modified high-thixotropy waterborne epoxy curing agent and a preparation method thereof, relates to the technical field of epoxy curing agents, and comprises the following steps: 1) mixing a small molecule aldehyde and diethylenetriamine to perform a reaction, so as to obtain an aldehyde imine-terminated modified amine; 2) performing a reaction on the aldehyde imine-terminated modified amine, a solvent-diluted multifunctional isocyanate and an amino group-terminated methoxy polyether, so as to obtain a hydrophilic modified aldehyde imine-terminated polyurea-based modified resin amine; and 3) mixing the hydrophilic modified aldehyde imine-terminated polyurea-based modified resin amine, an epoxy resin mixture and water to perform a reaction, so as to obtain the polyurea-based modified high-thixotropy waterborne epoxy curing agent. The urea-based modified waterborne epoxy curing agent can endow a paint film with excellent sag resistance when being compounded with a waterborne epoxy emulsion to form a film, the preparation process is simple, the production cost is low, and the application is suitable for large-scale industrialization.