75 results about "Polyaspartic acid" patented technology

This invention relates to the field of electroless plating technology, and more particularly to a low-phosphorus electroless nickel plating solution and a method for nickel plating on an aluminum alloy substrate. The low-phosphorus electroless nickel plating solution comprises the following components by mass concentration: a nickel ion source in the form of Ni... 2+ Calculated as 1.0~5.0 g / L; hypophosphite as H2PO2 ‑ The concentrations are calculated as follows: 20–45 g / L; glycine 5–40 g / L, gluconate 5–60 g / L; polyaspartic acid and / or its salts 0.2–5.0 g / L; pH buffer 2–25 g / L; alkyl glycosides 0.05–1.0 g / L; iodate stabilizer, in IO3... ‑ The concentration is calculated to be 0.2~5.0 mg / L. This invention maintains a high deposition rate and significantly improves the tolerance of by-products in the bath solution under low nickel ion concentration conditions. It is also free of heavy metals and sulfur-containing organic stabilizers, reducing the metal load and environmental risk of the waste liquid. It is suitable for various aluminum alloy matrices treated with double zinc replacement.

The application discloses a compound fertilizer for promoting cotton high yield and a preparation method thereof, relates to the technical field of cotton fertilizer, and comprises first mother liquor A, second mother liquor B and third mother liquor C which are prepared, stored and packaged separately; the first mother liquor A contains urea phosphate, monoammonium phosphate, anhydrous citric acid, malic acid and manganese sulfate monohydrate; the second mother liquor B contains commercial 11-37-0 liquid ammonium polyphosphate, ammonium salt type polyaspartic acid solution, purified fulvic acid clear liquid and tri-potassium citrate; and the third mother liquor C is a mixed system of polyol complex state boron clear pre-liquid and medium complex state zinc pre-liquid. The application can improve the effective state stability of phosphorus, zinc and boron, reduce the risks of precipitation fouling and dripping head blockage, alleviate the risks of local salt peak and root injury in the seedling stage, promote the uniform emergence and young root growth of cotton, and improve the yield.

The present invention relates to a kit comprising a first component of a polyisocyanate and a second component of a mixture of polyaspartic esters. It also relates to a coated pipe or tank element comprising a coating formed from such a kit, as well as a pipe or tank comprising one or more of these coated pipe or tank elements. Furthermore, it relates to a method for protecting a raw cast iron, steel, or concrete pipe or tank element using such a kit.

The invention discloses a sulfur-nitrogen co-doped carbon quantum dot modified polyaspartic acid derivative as well as a preparation method and application thereof. The derivative is prepared by taking citric acid and L-cysteine as precursors, synthesizing sulfur-nitrogen co-doped carbon quantum dots (SN-CDs) with rich functional groups on the surface by adopting a hydrothermal method, and introducing the sulfur-nitrogen co-doped carbon quantum dots into a side chain of polyaspartic acid (PASP) through graft copolymerization. The derivative not only retains the complexing ability of polyaspartic acid with metal ions such as calcium and magnesium, but also has excellent scale and corrosion inhibition performance; the optical characteristics of the carbon quantum dots are inherited, and stable fluorescence can be emitted under the excitation of specific wavelength, so that in-situ and real-time concentration monitoring in an industrial circulating cooling water system by utilizing a fluorescence spectrum technology is supported. The product does not contain phosphorus, is environment-friendly, conforms to the development trend of a green water treatment technology, and provides an innovative material solution for intelligent monitoring and fine management of a circulating water system while improving the comprehensive performance of scale and corrosion inhibition.

The application discloses a kind of corrosion and scale inhibitor sulfur removal agent and preparation method thereof, belong to sulfur removal agent technical field, by weight parts including following components: hydroxyl alkyl amine modified triazine compound 30~60 parts, polyaspartic acid scale inhibitor 10~25 parts, sodium gluconate 5~15 parts, ethylenediamine tetramethylene phosphonic acid sodium 3~10 parts, organic phosphonic acid corrosion inhibitor 2~8 parts and water 20~40 parts;The hydroxyl alkyl amine modified triazine compound is prepared by triazine sulfur removal agent and N-methyl diethanolamine or diethanolamine under 50~80 ℃ for 2~4 hours, wherein the molar ratio of triazine sulfur removal agent and hydroxyl alkyl amine is 1:0.3~0.8.The application is prepared by using hydroxyl alkyl amine modified triazine compound as core sulfur removal component, triazine sulfur removal agent and N-methyl diethanolamine or diethanolamine are reacted under specific temperature and time, which greatly improves the capture activity and reaction rate of hydrogen sulfide, and improves water solubility and dispersibility, realizes efficient sulfur removal.

This invention belongs to the field of protective coating technology, specifically relating to a protective coating for transportation vehicles resistant to phosphate ester hydraulic oil and its preparation method. The protective coating comprises component A and component B. Component A includes a polyurea-modified polyester resin, a surface tension modifier, a defoamer, and a mixed solvent. Component B includes an isocyanate prepolymer and xylene. The polyurea-modified polyester resin is prepared from polyether polyol, polyisocyanate, polyaspartic acid ester, polyol, catalyst, and xylene through a specific synthesis process. This protective coating can withstand the corrosion of phosphate ester hydraulic oil, providing a durable protective barrier. It solves the problem of softening and peeling of the protective coating due to leakage and diffusion caused by phosphate ester hydraulic oil spills after a period of use in transportation vehicles.

The application belongs to the field of polyurethane materials, and discloses a two-component bio-based self-cleaning anticorrosive coating for power transmission lines and a preparation method thereof, which comprises A component and B component with a mass ratio of 1:1-2; the A component is composed of the following components in parts by mass: bio-based polyurethane prepolymer 70-75 parts, hydrotalcite 5-8 parts, stearic acid 6-8 parts, modified fumed silica 3-5 parts, dibutyl titanate 0.1-0.2 parts, substrate binder C 3-5 parts, and substrate binder D 4-6 parts. The B component is composed of the following components: bio-based polyaspartic acid ester 85-90 parts, color paste 3-5 parts, defoaming agent 2-3 parts, leveling agent 1-2 parts, anti-precipitation additive 1-2 parts, and silane 2-4 parts. The two-component bio-based self-cleaning anticorrosive coating for power transmission lines does not need primer and topcoat, can meet the requirements of corrosion resistance, weather resistance and self-cleaning effect, can achieve long-acting self-cleaning effect, can improve construction efficiency, and can simplify the construction process.

This invention belongs to the field of heavy metal pollution remediation technology, and relates to the preparation and application of a cadmium passivating agent for weakly alkaline soil. The weakly alkaline soil cadmium passivating agent mainly comprises the following components by weight: 30-50 parts of a mineral complex, 40-60 parts of a bioactive component, and 5-15 parts of an auxiliary stabilizer. The mineral complex includes natural sepiolite, calcium-based bentonite, and a polyether-polyester diblock copolymer; the bioactive component includes microbial agents, phosphorus-modified biochar, lecithin, and phosphatidylserine; and the auxiliary stabilizer includes nano-hydroxyapatite and a chitosan-grafted polyaspartic acid complex. This weakly alkaline soil cadmium passivating agent exhibits excellent remediation effects on cadmium in contaminated soil, effectively preventing or reducing the entry of cadmium and other heavy metals into the food chain, and has significant market potential.

This invention belongs to the field of coatings and proposes a solvent-free coating and its preparation method. The raw materials include component A and component B in a mass ratio of 1:1. By mass parts, component A comprises: 45-60 parts polyester polyol, 25-35 parts polyether polyol, 6-10 parts polyaspartic acid ester resin, 2-3 parts epoxy resin, 6-8 parts titanium dioxide, 2-5 parts mica powder, 0.3-1 parts dispersant, 0.3-1 parts dehydrating agent, 0.6-1.3 parts catalyst, and 2-3 parts coupling agent. Component B consists of hexamethylene diisocyanate-based biuret polyisocyanate and dicyclohexylmethane diisocyanate in a mass ratio of 1.5-2:1. This polyurethane coating exhibits good aging resistance, no solvent evaporation, and is environmentally friendly.

This invention discloses a high flame-retardant and corrosion-resistant PVC composite coated tarpaulin material for transportation equipment and its preparation method, relating to the field of tarpaulin composite material technology. The tarpaulin, from the outside to the inside, includes an outer surface functional layer E3, an outer polyvinyl chloride functional coating, a fabric base E0 and an impregnation layer E1, and an inner weldable polyvinyl chloride coating. The outer polyvinyl chloride functional coating comprises a polyvinyl chloride resin matrix, an extract-resistant plasticizing system, a microencapsulated ammonium polyphosphate and hydrophobic zinc borate flame-retardant system, a calcium-zinc stabilizing system, and contains sacrificial oxidation buffer components and rare earth oxide nano-components. The outer surface functional layer E3 is a polyaspartic acid ester type polyurea polyurethane coating containing the two components mentioned above, including impregnation and cross-linking of the base fabric, double-sided coating with paste and fusion, and corona treatment of the outer surface followed by sequential coating with E2 and E3 to cure into a film. It is suitable for hypochlorite and peroxide disinfection and cleaning environments and can be assembled and used with high-frequency welding.

This application relates to the field of adhesive technology, specifically disclosing a low-formaldehyde environmentally friendly adhesive and its preparation method. The low-formaldehyde environmentally friendly adhesive is prepared from the following raw materials in parts by weight: 30-50 parts modified starch, 15-25 parts plant protein, 5-10 parts modified nanocellulose, 2-5 parts composite crosslinking agent, and 80-150 parts water; the composite crosslinking agent includes aminosilane and polyaspartic acid; the modified starch is obtained by enzymatic hydrolysis of starch with α-amylase followed by graft copolymerization with a composite acid anhydride; the plant protein is alkalized and heat-treated before use; the modified nanocellulose is obtained by sequentially reacting nanocellulose with propylene oxide and ethylene oxide in a ring-opening etherification reaction. The low-formaldehyde environmentally friendly adhesive obtained by this application has good bonding strength and low formaldehyde release.

The application discloses a micron thorn ball-shaped soil leaching material and a preparation method and application thereof, and belongs to the field of new materials. The heavy metal contaminated soil leaching material is composed of a composite inorganic nanocrystal core of iron oxide and trimanganese tetroxide, an organic cross-linking network framework of sodium alginate and polyaspartic acid, and an amino tris methylene phosphonic acid derivative phosphate. The heavy metal contaminated soil leaching material has the advantages of large specific surface area, environmental friendliness, simple preparation process, and effective reduction of the heavy metal content in soil, and can be widely applied to the field of soil heavy metal leaching.

This invention relates to the field of soil remediation and improvement technology, specifically disclosing a soil remediation and improvement agent for contaminated soil and its preparation method. The remediation and improvement agent comprises the following raw materials in parts by weight: modified remediation masterbatch, hydroxyapatite, sodium bentonite, mineral-derived potassium humate, and polyaspartic acid. The preparation method includes: firstly, using lignin to disperse and fix an iron source on biochar and zeolite to obtain a modified carrier; then, using a colloid formed from sodium alginate and silane, adhering modified lithium titanate and modified bismuth tungstate to the carrier surface, and then applying a low-temperature compound bacterial agent to obtain the modified remediation masterbatch; finally, mixing the masterbatch with other raw materials and granulating. The improver prepared by this invention utilizes the synergistic effect of multiple materials to simultaneously adsorb heavy metals and degrade organic pollutants, and the process is controllable, making it suitable for agricultural applications.

This invention discloses an essential oil nanoemulsion based on amphiphilic polyamino acids, its preparation method, and its applications, relating to the field of emulsion preparation technology. The preparation method of the essential oil nanoemulsion includes: grafting amino acids with hydrophobic residues onto polyaspartic acid to synthesize amphiphilic polyamino acids; mixing the amphiphilic polyamino acids with essential oils uniformly to obtain an essential oil nanoemulsion with good stability; this invention also provides applications of the essential oil nanoemulsion in food, cosmetics, or pharmaceutical preparations. This invention, by grafting amino acids with hydrophobic residues onto polyaspartic acid to form amphiphilic polyamino acids; using the amphiphilic polyamino acids as emulsifiers to emulsify essential oils, and preparing essential oil nanoemulsions through a spontaneous emulsification method, not only improves the water solubility and stability of essential oils but also reduces their volatility and irritating odor, while also possessing good biocompatibility and biodegradability, expanding the applications of essential oils in the food, daily chemical, and pharmaceutical fields.

The application belongs to the technical field of ceramic membrane and specifically provides a high-permeability nanoscale silicon carbide ceramic flat membrane and a preparation method thereof. The preparation method of the high-permeability nanoscale silicon carbide ceramic flat membrane comprises the following steps: 1) mixing silicon carbide and an additive, then adding a dispersion sol and deionized water to obtain a mud; 2) after the mud is aged, extrusion-second aging-extrusion molding is performed to obtain an original main body; and 3) the original main body is sintered, immersed in a coating solution to obtain the high-permeability nanoscale silicon carbide ceramic flat membrane; the dispersion sol comprises bacterial cellulose-epoxy silane-polyaspartic acid polymer and polyacrylonitrile dispersion liquid. The high-permeability nanoscale silicon carbide ceramic flat membrane prepared by the application has higher porosity and pure water flux.

This invention provides a composite coating based on FPEEK, its preparation method, and its application, relating to the field of polymer composite materials technology. The preparation method involves adding polyaspartic acid ester (a polyurea precursor) to an FPEEK solution and dispersing it uniformly, then introducing h-BN and TiO2 inorganic fillers, and finally adding isocyanate to initiate curing. During this process, the in-situ generated polyaspartic acid ester molecular chains interpenetrate and entangle with FPEEK, forming a strong interfacial bond "dual-resin" continuous phase matrix, which greatly enhances the coating's cohesive strength and substrate adhesion. Simultaneously, this composite matrix effectively stabilizes and disperses h-BN and TiO2 nanofillers, preventing their aggregation and ensuring uniform distribution within the coating, synergistically imparting high solar reflectivity and high-to-medium infrared radiation characteristics to the coating.

The present application relates to the field of slow-release compound fertilizer preparation, in particular to a green organic compound fertilizer and a preparation method thereof.The green organic compound fertilizer comprises an inner core, the inner core being a fertilizer base particle containing organic matter and inorganic nitrogen, phosphorus and potassium; a coating layer, the coating layer being coated on the surface of the inner core, the coating layer being formed by cross-linking and solidification of a coating liquid and a solidification liquid on the surface of the inner core; the coating liquid comprising an aqueous solution of a lignin-polypeptide graft copolymer and a borate, the lignin-polypeptide graft copolymer being formed by connecting carboxymethylized alkali lignin and an amino-rich polypeptide or a polyaspartic acid derivative through an amide bond; the solidification liquid being an aqueous solution containing a metal ion cross-linking agent; in the coating layer, the lignin-polypeptide graft copolymer and the borate form a borate ester bond, and the lignin-polypeptide graft copolymer and the metal ion cross-linking agent form a metal coordination bond.The present application effectively avoids the secondary pollution problem caused by the degradation of traditional high-molecular chemical resin coating materials to the soil.

This invention specifically discloses an environmentally friendly recyclable drilling mud for municipal directional drilling, its preparation process, and its application. The mud is composed of water, bio-enzyme-activated modified bentonite, polyaspartic acid derivatives, industrial solid waste fillers, plant extracts, a compound corrosion inhibitor, and functional regulators in specific mass percentages. Its preparation process includes pretreatment, base mud preparation, functional addition, and adjustment optimization steps; the application process covers construction grouting, slag removal, recycling, and final biodegradation treatment. This invention, through the synergistic utilization of environmentally friendly and biodegradable core components and industrial solid waste, endows the mud with excellent biodegradability. Waste mud can be discharged or reused after simple treatment. This mud system has stable performance and can be recycled more than 5 times. It has significant wall protection and anti-collapse effects in complex strata such as silty clay and sand layers, effectively controlling surface subsidence while significantly reducing water consumption, raw material costs, and waste disposal costs, achieving green, low-carbon, economical, safe, and efficient municipal directional drilling.

The present application relates to the technical field of fertilizer, in particular to a general water-soluble fertilizer for agricultural planting and a preparation method thereof.The fertilizer is composed of a modified polyaspartic acid salt additive, a macroelement fertilizer and a trace element fertilizer.The additive is obtained by alkaline hydrolysis after the reaction of polysuccinimide with 3-amino-1,2-propanediol, boric acid, sodium tetraborate decahydrate and potassium taurate in sequence.The process of first preparing a pre-dispersion of the additive and trace elements and then mixing with macroelements can improve the solubility stability of the fertilizer in high-hardness water and increase the soluble retention rate of iron and zinc, and is suitable for integrated water and fertilizer application.

The application discloses a kind of phosphorus-free scale inhibiting dispersants and preparation method thereof.In one aspect, the application provides a kind of phosphorus-free scale inhibiting dispersants, and the mass fraction ratio of each component of the phosphorus-free scale inhibiting dispersants includes: modified polyaspartic acid-acrylic acid-EDTA copolymer 24~28 parts, itaconic acid-styrene sulfonic acid copolymer 60~64 parts, zinc sulfate 2~3 parts.In another aspect, the application provides the preparation method of the above-mentioned phosphorus-free scale inhibiting dispersant, including the following steps: S1, preparation modified polyaspartic acid-acrylic acid-EDTA copolymer;S2, preparation itaconic acid-styrene sulfonic acid copolymer;S3, according to formula amount weighing each component, after being mixed sufficiently, phosphorus-free scale inhibiting dispersant is prepared.The high temperature stability of the application is better, and the scale inhibiting effect of calcium, magnesium, barium and other ions is all more excellent.

This invention relates to the field of oilfield water treatment technology, and discloses a scale inhibitor for high-calcium and magnesium water and its preparation method. The scale inhibitor, by weight, is composed of polyepoxysuccinic acid, organic amine chelating agent, amino acid-modified polyaspartic acid, succinic acid ester, nonionic surfactant, pH adjuster, and deionized water. This invention is phosphorus-free and environmentally friendly, eliminating traditional phosphorus-containing components and avoiding the risk of eutrophication. Through the synergistic effect of multiple components, it possesses strong chelating, lattice distortion, and dispersing properties, exhibiting excellent scale inhibition rates for calcium carbonate and magnesium carbonate scale in high-calcium and magnesium oilfield reinjection water. It also has good corrosion inhibition and storage stability, solving the problems of poor resistance to high hardness and limited performance of traditional agents. It is suitable for scale prevention treatment of high-calcium and magnesium water in oilfields and industries.

The application discloses a chemical mechanical polishing liquid and a polishing method for soft magnetic alloy. The polishing liquid is composed of the following raw material components in percentage by weight: 1.3wt%-1.8wt% of a chelating agent, 10wt%-13wt% of abrasive, 7wt%-9wt% of a pH buffer, 3wt%-3.5wt% of a corrosion inhibitor, 11wt%-13wt% of an oxidizing agent and the balance of deionized water. The abrasive is acidic silica sol, the oxidizing agent is hydrogen peroxide, the corrosion inhibitor is at least one of glycine, polyaspartic acid, glutamic acid and chitosan, the pH of the polishing liquid is 3-5, and the pH buffer is a citric acid-sodium citrate buffer. The polishing method comprises the following steps: grinding the soft magnetic alloy; performing chemical mechanical polishing rough polishing on the ground soft magnetic alloy by using a rough polishing slurry; performing chemical mechanical polishing fine polishing on the rough polished soft magnetic alloy by using the polishing liquid, so that the soft magnetic alloy with a smooth and flat surface is obtained. The polishing liquid is green, environment-friendly and pollution-free, and the surface of the soft magnetic alloy after polishing is smooth and flat.

This invention discloses a liquid-phase functional urethane antifouling coating, its preparation method, and its application. The preparation method includes the following steps: S1. Mixing monohydroxy-terminated polydimethylsiloxane and polypropylene glycol and removing water to obtain solution A; S2. Dissolving hexamethylene diisocyanate trimer in xylene to obtain solution B; slowly adding solution B dropwise to solution A while continuously stirring; S3. After the addition is complete, heating the reaction to 80-85°C and continuously stirring to ensure a complete reaction, finally obtaining prepolymer C; S4. Adding curing agent polyaspartic acid ester, leveling agent, and defoamer to solution C, and stirring to obtain solution D; S5. Applying solution D to the surface of a substrate and curing at room temperature for 2 hours to obtain a liquid-phase functional urethane antifouling coating. The antifouling coating of this invention can cure at room temperature, is environmentally friendly, inhibits the adhesion of fouling organisms, and has good anti-icing properties.

The application discloses rape flower period one promotes four prevents multifunctional foliar fertilizer and a preparation method and application thereof, and the preparation method comprises the following steps: firstly, preparing citric acid-glycine copolymer through polycondensation reaction of citric acid and glycine, and preparing polyaspartic acid-caprolactam copolymer through ring-opening copolymerization reaction of polyaspartic acid and caprolactam; secondly, mixing quick-acting chelated boron and non-ionic surfactant, and mixing long-acting chelated boron and anionic dispersant to form dispersion liquids at 40-50 DEG C, mixing the dispersion liquids in proportion, and adding polyethylene glycol to obtain composite chelated boron; finally, mixing base nutrient components, bacillus subtilis, imidacloprid and the composite chelated boron in sequence, adjusting the pH value to 6-7, and filtering the mixture through a 200-300 mesh filter screen to obtain the finished product. The quick-acting chelated boron formed by the citric acid-glycine copolymer realizes rapid boron absorption, and the long-acting chelated boron formed by the polyaspartic acid-caprolactam copolymer realizes long-acting supply, so that the continuous supply of boron during the flowering period is ensured.

A water-soluble automatic dishwashing detergent pouch that contains the combination of dipicolinic acid and / or salt thereof together with polyaspartate.

This invention relates to the field of bactericide technology, specifically to a corrosion and scale inhibitor bactericide and its preparation method. This corrosion and scale inhibitor bactericide is an aqueous solution containing a special polyaspartic acid derivative, wherein the same polymer chain simultaneously contains polyaspartic acid carboxylic acid units, benzyl quaternary ammonium units, dodecyl quaternary ammonium units, and carboxymethyl betaine units. Its preparation method includes: using L-aspartic acid as a starting material, through steps such as polycondensation, ring-opening amination, two-step quaternization, and hydrolysis and betaine alkalization. This invention, through integrated molecular structure design, enables synergistic effects of various functional groups, achieving excellent corrosion inhibition, scale inhibition, and bactericidal performance at low dosages, and possessing good long-term dynamic stability, solving the technical problems of poor synergy and easy performance degradation in existing compound agents.

The application discloses an oilfield corrosion and scale inhibitor and a preparation method thereof, and relates to the technical field of corrosion and scale inhibitors. In the preparation of the oilfield corrosion and scale inhibitor, modified polyaspartic acid is prepared by reacting poly succinimide with 3,5-diamino salicylic acid and p-aminobenzenesulfonic acid; and the oilfield corrosion and scale inhibitor is prepared by reacting the modified polyaspartic acid, hydroxypropyltrimethylammonium chloride chitosan and 2,5-thiophenedicarboxaldehyde. The oilfield corrosion and scale inhibitor prepared by the application has good corrosion and scale inhibition performance.

The application discloses a kind of polyaspartic acid manganese polymer complex, it is characterized in that, its molecular structure formula is as shown in formula I: (I) Wherein, m is 1-33, n is 0-100.The polyaspartic acid manganese polymer complex provided in the application is prepared by one-step method chelation of polyaspartic acid ligand and manganese ion, process is simple and low in cost, as contrast agent, it has high relaxation efficiency and good biological safety, can realize kidney target enrichment, greatly improve the signal-to-noise ratio of MRI scanning, has excellent application prospect in kidney function evaluation and related disease diagnosis.