280 results about "Anionic polymers" patented technology

The invention discloses an anti-scale cross-linked polymer fracturing fluid and a preparation method thereof, and relates to the technical field of petroleum fracturing fluids. When the anti-scale cross-linked polymer fracturing fluid is prepared, allylamine hydrochloride and epoxy chloropropane react to prepare a double-bond chlorinated intermediate; reacting the double-bond chlorinated intermediate with lauramidopropyl dimethylamine to prepare a cationic monomer; copolymerizing a cationic monomer and acrylamide to prepare a cationic polymer; the preparation method comprises the following steps: reacting L-lysine with formaldehyde and phosphorous acid to prepare phosphoric acid modified lysine; reacting the phosphoric acid modified lysine with allyl glycidyl ether to prepare a phosphoric acid modified monomer; acrylamide and an anionic monomer are copolymerized to prepare an anionic polymer; the anionic polymer and the cationic polymer are dissolved in water to prepare the anti-scale cross-linked polymer fracturing fluid. The anti-scale cross-linked polymer fracturing fluid prepared by the invention has the advantages of scale prevention, good temperature resistance, good shear resistance and self-crosslinking.

The invention relates to the technical field of pharmaceutical preparations, in particular to a multiple nano emulsion adjuvant and a preparation method thereof. The multiple nano emulsion adjuvant is prepared from 2.73 to 6.37 g of an oil phase matrix based on 100 g of a raw material system, 0.10 to 0.25 g of a sterol compound; 0.212 to 0.424 g of a nonionic surfactant; 0.00050 to 0.00200 g of a triterpenoid saponin type active adjuvant; 0.010 to 0.020 g of an anionic polymer modifier; 0.005 to 0.015 g of a cationic polymer modifier; 70-90 g of a buffer solution; the total mass of the raw materials is 100 g. The nano emulsion adjuvant prepared by the invention can be stored for 6 months at 2-8 DEG C under a low sterol condition, the particle size change does not exceed + 5%, no crystallization or layering is generated, and the stability of the active adjuvant is remarkably improved.

A new polyelectrolyte multilayer coated proton-exchange membrane for electrolysis and fuel cell applications has been developed for electrolysis and fuel cell applications. The polyelectrolyte multilayer coated proton-exchange membrane comprises: a cation exchange membrane, and a polyelectrolyte multilayer coating on one or both surfaces of the cation exchange membrane. The polyelectrolyte multilayer coating comprises alternating layers of a polycation polymer and a polyanion polymer. The polycation polymer layer is deposited on and is in contact with the cation exchange membrane. The top layer of the polyelectrolyte multilayer coating can be either a polycation polymer layer or a polyanion polymer layer.

The invention discloses a phosphogypsum harmless treatment system which comprises a phosphogypsum conveying belt scale, a moisture content detector, a phosphogypsum storage bin, a powder bin, a powder conveyor, an anionic polymer liquid bin, anionic polymer liquid conveying equipment, a water distribution device, a spraying device, a stirrer and a control module. According to the present invention, the mixing ratio can be intelligently and automatically adjusted and controlled according to the initial water content of phosphogypsum, and the amount of the powder material, the amount of the anionic polymer liquid and the amount of the water are output; the powder, the anionic polymer liquid and the water diluent cooperate with one another, so that harmless treatment of the ardealite is realized; the acidity of the ardealite is reduced, the pH value is increased, the content of water-soluble fluorine and total phosphorus is reduced, the industrial solid waste standard is met, and harmless treatment of the ardealite with the annual yield of 1 million tons is achieved.

Proton exchange membranes are described. The proton exchange membrane includes: a reinforcing membrane; a continuous non-porous hydrogen recombination catalyst coating, the continuous non-porous hydrogen recombination catalyst coating comprising a mixture of a hydrogen recombination catalyst and a proton conducting ionomer; and a continuous non-porous cross-linked polyelectrolyte multilayer coating, the continuous non-porous cross-linked polyelectrolyte multilayer coating comprising alternating layers of a polycationic polymer and a polyanionic polymer. Catalyst coated membranes incorporating proton exchange membranes and methods of making proton exchange membranes are also described.

A cosmetic composition comprising: (a) 2-mercaptonicotinoyl glycine; (b) acyl glycinate surfactant; (c) a salt providing divalent cations having a charge density of about 40 to about 200 C / mm3 and a water solubility of at least 400 g / L; (d) anionic polymer; (e) glycerin; (f) water; and (g) reducing agent. The cosmetic composition is particularly useful in a method for brightening skin, depigmenting skin, treating hyperpigmentation of skin, treating melasmic skin, or evening skin tone.

The invention provides a natural Chinese herbal medicine hydrogel composite microneedle and a preparation method and application thereof.The preparation method comprises the steps that S1, natural food-borne nutrients and glycyrrhizic acid are mixed in a solvent, and a glycyrrhizic acid / natural food-borne nutrient solution is obtained; the natural food-borne nutrient is one or more of astaxanthin, baicalein, berberine and curcumin; s2, dropwise adding a metal salt solution into the glycyrrhizic acid / natural food-borne nutrient solution, and performing ultrasonic treatment and stirring to obtain glycyrrhizic acid / food-borne active substance gel; s3, mixing the polyanionic polymer solution with the glycyrrhizic acid / food-borne active substance gel to obtain a mixed solution; and S4, adding the mixed solution into a microneedle mold, carrying out vacuum centrifugation, and drying to obtain the microneedle patch. Good biocompatibility of the natural Chinese herbal medicine extract glycyrrhizic acid is used as a carrier to increase the in-vivo utilization rate of natural food-borne nutrients, so that a better treatment effect is achieved.

The invention relates to the technical field of hydrogel, in particular to photocuring 3D printing ink and a preparation method thereof, synchronous curing bi-crosslinking hydrogel and application thereof. According to the invention, based on the characteristic that an initiator (persulfate) commonly used in a hydrogel preparation process has strong oxidizing property and can react with reducing metal ions to generate free radicals, Fe < 2 + > released by a cationic photoinitiator containing Fe < 2 + > in ultraviolet light reacts with persulfate to generate Fe < 3 + > and free radicals; the preparation of the water-soluble anionic polymer and water-soluble vinyl monomer double-network cross-linked hydrogel is synchronously realized. According to the invention, the problems of insufficient conductivity, stretchability and flexibility of hydrogel prepared by utilizing photocuring 3D printing are solved.

The present invention relates to a composition comprising: (a) at least one particle comprising at least one cationic polymer and at least one anionic polymer, at least one cationic polymer and at least one amphoteric polymer, at least one anionic polymer and at least one amphoteric polymer, or at least one amphoteric polymer, and at least one non-polymeric acid having two or more pKa values or salt(s) thereof or at least one non-polymeric base having two or more pKb values or salt(s) thereof; and (b) water, wherein the anionic polymer is selected from hyaluronic acid and derivatives thereof, and the amphoteric polymer is selected from cationized hyaluronic acid and salts thereof. The composition according to the present invention is stable, and can have a variety of cosmetic functions. The stickiness of the composition according to the present invention can be reduced.

This invention relates to the field of medical dressing technology, and discloses a hydrogel dressing, its preparation method, and its application. The hydrogel dressing is prepared by physical cross-linking of the following raw materials: 6% (w / v) anionic polysaccharide, and 1%-3% (w / v) cellulose derivatives or anionic polymers. This invention provides an advanced hydrogel dressing solution with balanced performance, adjustable function, safety, gentleness, and ease of industrialization, effectively overcoming many limitations of existing technologies and possessing significant application value in wound care.

The present invention relates to an antifouling coating composition comprising an anionic polymer having one or more metal cations wherein the anionic polymer has siloxane moieties covalently bonded via amide groups. The anionic polymer is an acrylate-based copolymer prepared from at least one acrylate-based monomer and at least one acrylamide-based monomer having a linked polysiloxane moiety. The composition is particularly useful as a self-polishing antifouling coating.

This invention relates to the field of polymer technology, specifically disclosing an oxyfluorene-containing polyaryl suspended side-chain anion exchange polymer. By introducing an oxyfluorene structure, this invention successfully overcomes the defects of traditional polyaryl ether materials, such as easy main chain breakage and degradation under strong alkaline conditions, thus improving the chemical and thermal stability of the material. The suspension side-chain strategy introduces benzene rings, quaternary ammonium groups, or piperidine cationic groups, effectively promoting microphase separation within the polymer and constructing efficient ion transport channels. This allows the membrane material to maintain a low swelling ratio while achieving good hydroxide ion conductivity, reaching up to 170.2 mS / cm at 80°C. The polymer exhibits excellent mechanical properties, with outstanding dry membrane tensile strength and excellent alkali resistance and durability. After immersion in a strong alkaline (KOH) solution at 80°C for over 1800 hours, its conductivity loss is minimal. The anion exchange membrane prepared by this invention has good application value in fuel cells and water electrolysis for hydrogen production, demonstrating strong commercial potential.

The invention discloses a microphase separation hydrogel electrolyte with ion selectivity and a preparation method and application thereof. The electrolyte is prepared by constructing a microphase separation polymer network composed of a polyanionic polymer and an ion exchange group-containing polymer in a synergistic manner and inducing crosslinking by using metal ions. The formation of a continuous ion transmission channel in the hydrogel is realized. The technical problem that high ionic conductivity and high ionic transference number are difficult to obtain at the same time in a traditional hydrogel electrolyte is solved, spatial unwrapping and selective coordination of a polymer chain segment are induced through a microphase separation structure, and directional construction of an ion channel is achieved; and the ion conductivity of the electrolyte is remarkably improved, and meanwhile, the target ion transference number is further improved. The prepared hydrogel electrolyte has high mechanical stability, high ion flux and excellent ion selectivity, and can be widely applied to high-performance electrochemical devices such as batteries.

The invention relates to an amorphous bismuth molybdate photocatalytic material as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The preparation method of the amorphous bismuth molybdate photocatalytic material comprises the following steps: (1) dissolving Bi (NO3) 3.5 H2O in an HAC solution, uniformly mixing and stirring at room temperature, and marking as a solution A; dissolving Na2MoO4 in water, adding a water-soluble anionic polymer, uniformly stirring, and marking as a solution B; and (2) slowly dropwise adding the solution B into the solution A, carrying out a co-precipitation reaction under the conditions of normal temperature and normal pressure, after dropwise adding is completed, maintaining heating and stirring for a period of time, then carrying out normal-temperature stirring, and after stirring is completed, carrying out centrifugation, washing and drying to obtain the amorphous bismuth molybdate photocatalytic material A-Bi2MoO6. The modified amorphous A-Bi2MoO6 provided by the invention has a relatively large specific surface area and more mesoporous structures, so that the adsorption of rhodamine B is enhanced, and the adsorbed dye can be efficiently catalyzed and degraded under the action of illumination.

The present invention relates to a composition comprising a plurality of aqueous phases comprising: (a) at least one cationic polymer; (b) at least one non-polymeric acid having two or more pKa values or salt thereof; (c) at least one anionic polymer, and (d) water, and a fatty phase comprising: (e) at least one oil, wherein the aqueous phases are dispersed in the fatty phase, and the composition further comprises (f) at least one first powder comprising (i) at least one inorganic oxide, and (ii) at least one fatty acid or salt thereof. The composition according to the present invention is stable and can provide a keratin material such as skin with, at least, an acceptable level of sebum control, good spreadability and comfortable feeling to use.

This invention relates to an aqueous polyurethane composition comprising: a liquid medium comprising at least one organic liquid having a solubility in water of ≥4 g organic liquid / 100 g water at 25°C, and water; at least one polyurethane polymer compound dispersed in the liquid medium; and optionally at least one coating formulation component. The polyurethane composition further comprises at least one thickener comprising at least one anionic polymer selected from anionic polyacrylamide, anionic polymethacrylamide, anionic polyacrylamide-polymethacrylamide, and / or a mixture of at least two thereof, and optionally, 0 to 0.12% by weight, preferably 0 to 0.05% by weight, more preferably 0 to 0.01% by weight, based on 100% of the total weight of the aqueous polyurethane composition, at least one compound selected from unbound or ionicly bound organic amines, ammonia, or a mixture of at least two thereof, wherein the aqueous polyurethane composition has a pH value ≤ 8.5, and wherein the at least one thickener is different from the at least one coating formulation component and the at least one polyurethane polymer. The present invention further relates to a kit-of-parts for preparing a waterborne polyurethane composition, a method for preparing a waterborne polyurethane composition, and the use of the waterborne composition.

The invention discloses a nucleic acid vaccine based on different forms of nano-aluminum adjuvants and application thereof, the nucleic acid vaccine is composed of an inner core, a middle layer and a shell from inside to outside in sequence, the inner core is a compound of a cationic polymer and nucleic acid, the middle layer is an anionic polymer, and the shell is a continuous or discontinuous nano-aluminum coating layer. The nano-aluminum-coated nucleic acid delivery system provided by the invention is used for preparing vaccines, can effectively activate antigen presenting cells and promote antigen presentation, so that humoral immunity and cellular immunity processes of an organism are simultaneously activated, the tumor immunotherapy effect is enhanced, and the nano-aluminum-coated nucleic acid delivery system has relatively high clinical use value.

This invention relates to a particle-polymer aggregate composite oil displacement agent and its application. The oil displacement agent of this invention comprises: (A) a particle suspension containing particles and water, wherein the mass fraction of the particles is 200-2000 ppm; and (B) a polymer solution containing a polymer and water, wherein the mass fraction of the polymer is 0.01-10 ppm, and the polymer is one of the following: (B1), (B2), or (B3): (B1) an ionic polymer, wherein the ionic polymer is a cationic or anionic polymer, wherein the charge of the ionic groups on the polymer molecular chain is opposite to the charge of the particle surface; (B2) a mixture of cationic and anionic polymers; (B3) a naturally aged nonionic polymer. The oil displacement agent of this invention is low in cost, easy to inject, has a high sealing effect, and good oil displacement effect.

The application relates to the technical field of drug delivery, and discloses a polymer microcrystal patch fused with a biodegradable material and a preparation method thereof, which comprises a microneedle array and a supporting substrate made of raw materials, and is characterized in that the microneedle array is made of raw materials containing a cationic polymer, an anionic polymer, an ion shielding agent and an active ingredient. The preparation method comprises the following steps: filling a solution containing a cationic polymer and an active ingredient into a microneedle negative mold; and covering the surface of the solution with a layer of a solution containing an anionic polymer and an ion shielding agent. By introducing the ion shielding agent, the application effectively controls the ion crosslinking rate between the polymers, solves the problem of incomplete microneedle forming caused by too fast reaction, and significantly improves the forming quality of the microneedles. The method is carried out at room temperature, the conditions are mild, the bioactivity of the active ingredient can be effectively protected, and the used materials are good in biocompatibility and high in safety.

Disclosed are compositions containing carbonation-cured cementitious materials and a polyanionic polymer, and methods of making thereof. The carbonation-cured cementitious materials contain calcium silicates and the polyanionic polymer can constitute between about 0.01 wt.% and about 10 wt.% of the compositions, or between about 0.01 wt.% and about 10 wt.% of the calcium silicates. Containing the disclosed compositions have (i) increased compressive strength, (ii) increased flexural strength, (iii) increased carbon dioxide sequestration capabilities, (iv) increased calcite content, (v) reduced total pore area, or a combination of (i)-(v) when compared to a composition made from similar materials that are not carbonation-cured and / or not supplemented with the polyanionic polymer.

The present invention relates to an emulsified cosmetic composition, and more particularly, to an emulsified cosmetic composition and a method for preparing the same, the emulsified cosmetic composition comprising: an oil phase part comprising a cationic polymer and an oil gelling agent; and an aqueous phase part comprising an anionic polymer. The present invention enables an emulsion cosmetic composition comprising a high content of oil to maintain the appearance, quality, and feeling of use in the initial stage of preparation, even when circulated at a low temperature, by improving the stability at the low temperature, until the final consumer touches the emulsion cosmetic composition.

Particles are provided that include a liposome having a negatively charged outer surface and a lipid-drug conjugate, a first layer of cationic polymer such as poly-L-arginine (PLR), that is non-covalently associated with the negatively charged outer surface of the liposome, and a second layer having a mixture of an anionic polymer and polyethylene glycol modified anionic polymer that is non-covalently associated with the first layer. The particles can be formulated as pharmaceutical compositions that are useful in methods that target neurological disorders such as brain tumors and other neurological diseases, and that can deliver and / or transport therapeutic drugs across the blood brain barrier.

The present invention relates to a highly concentrated fabric softener formulation which is provided in the form of a water-soluble tablet and which can be conveniently used with detergents in domestic washing machines. The formulations include a combination of an anionic surfactant and a cationic and / or anionic polymer that act together on the fabric to produce a softening effect. The product form allows a highly concentrated product to be achieved such that it contains a high proportion of the active ingredient, thus substantially reducing both the occupied volume and mass while providing the same amount of active ingredient and compliant efficacy. The properties of the formulations of the present invention are equivalent to or superior to those of a standard liquid two-in-one detergent / fabric softener combination at the same dose.

A chemical mechanical polishing composition for polishing tungsten or molybdenum comprises, consists essentially of, or consists of a water based liquid carrier, abrasive particles dispersed in the liquid carrier, an amino acid selected from the group consisting of arginine, histidine, cysteine, lysine, and mixtures thereof, an anionic polymer or an anionic surfactant, and an optional amino acid surfactant. A method for chemical mechanical polishing a substrate including a tungsten layer or a molybdenum layer includes contacting the substrate with the above described polishing composition, moving the polishing composition relative to the substrate, and abrading the substrate to remove a portion of the tungsten layer or the molybdenum layer from the substrate and thereby polish the substrate.

The invention relates to the field of post-treatment of polymers, and discloses a preparation method of an anionic polymer and the anionic polymer. The method comprises the following steps: in a non-polar solvent, in the presence of an initiator and a structure regulator, carrying out an anionic solution polymerization reaction on an anionic polymerization monomer to obtain an anionic polymer solution; adding organic acid to carry out first termination, adding a demulsifier solution to carry out second termination, and carrying out first sedimentation and phase separation to obtain a terminated anionic polymer solution; carrying out washing, secondary sedimentation and phase separation on the anionic polymer solution to obtain a washed anionic polymer solution; after an anti-aging agent is added, post-treatment is carried out, and an anionic polymer is obtained; the organic acid is C4-C12 monobasic fatty acid; the demulsifying agent is selected from a cationic demulsifying agent and / or a nonionic demulsifying agent. According to the preparation method, the content of residual metal lithium and the content of a terminator in the product anionic polymer can be reduced, and the quality of the anionic polymer is improved.

The invention discloses a core-shell microcapsule and a preparation method thereof, and relates to the technical field of daily chemical products. The core-shell microcapsule comprises a microcapsule core with a hydrophobic material and a microcapsule shell for encapsulating the microcapsule core, the microcapsule shell comprises hybrid thermosetting resin formed by reacting multifunctional amine with epoxy resin and acrylate respectively, a coordination polymer formed by an anionic polymer containing carboxylate radicals and divalent cations, and a polyion compound formed by the anionic polymer containing carboxylate radicals and a cationic polymer. The core-shell microcapsule disclosed by the invention is suitable for wrapping various hydrophobic / lipophilic oily core materials, shows good stability in a high-temperature washing liquid environment and good adhesion performance on fabrics, and the capsule shell material has a biodegradable characteristic, so that the coating of essence can be effectively realized and the functional requirement of generating fragrance by friction can be met; the environment friendliness, the use safety and the application functionality are realized.

To enhance a color-fading prevention effect on washed articles in a liquid detergent composition for fibrous products.SOLUTION: A liquid detergent composition for fibrous products comprises a polymer (A) having a specific repeating unit, a polymer (B) having a specific repeating unit, and a surfactant (C) excluding soap, wherein the content of the surfactant (C) is 35 mass% or more relative to a total mass of the liquid detergent composition for fibrous products, and the liquid detergent composition optionally comprises an anionic polymer (D) (excluding the polymer (A) and the polymer (B)), and the mass ratio represented by [the anionic polymer (D)] / [the polymer (A)] is 0.8 or less.SELECTED DRAWING: None

The present invention discloses a quantum dot light-emitting diode and a preparation method thereof. The quantum dot light-emitting diode includes: a quantum dot layer; an anion polymer layer formed on the surface of the quantum dot layer; and an electron transport layer formed on the surface of the anion polymer layer. In the quantum dot layer of the quantum dot light-emitting diode of the present invention, the surface in contact with the electron transport layer is coordinated with an anion polymer, and the remaining regions of the quantum dot layer still retain the original ligands. According to the principle of like charge repulsion and opposite charge attraction, when the surface ligand on the side of the quantum dot layer close to the electron transport layer is replaced with an anion polymer, the electron injection with the same charge as the functional group of this anion polymer can be hindered to a certain extent, thereby contributing to improving the effective recombination of carriers in the entire quantum dot layer and enhancing the device performance.

The present invention relates to an antifouling coating composition comprising an anionic polymer, an amine cation and less than 5% by weight of water wherein the anionic polymer has one or more covalently linked siloxane moieties wherein the amine cation is a protonated amine compound, the amine compound (prior to protonation) has a boiling point at atmospheric pressure of at least 100 DEG C and a molecular weight of at least 70.

A method for producing an expanded rigid foam with sealed pores includes at least the following steps: a) a mixture is prepared containing at least: an anionic polymer suited for ionotropic gelation; a foaming agent; a source of multivalent cations, said multivalent cations not being released in the mixture a); and a solvent; b) the mixture is stirred so as to obtain a foam; c) a compound capable of releasing protons in a sufficient amount to release said multivalent cations is added to the foam such that the anionic polymer gels ionotropically; d) the foam is dried. A foam is obtained in this manner and an object (for example a package, a heat-insulating or flame-retardant material) is made from this foam.