182 results about "Anionic polymers" patented technology

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 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.

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.

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 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 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.

The invention relates to the field of separation membranes, and discloses a caustic material separation membrane and a preparation method thereof, the caustic material separation membrane comprises a porous carrier and a cross-linking layer on the surface of the porous carrier; the cross-linking layer is prepared by cross-linking a pre-cross-linking product of a polyol compound and an anionic polymer with a cross-linking agent; the hydroxyl value of the polyhydric alcohol compound is 400 to 2000 mgKOH / g; the anionic polymer at least comprises one acidic group; the cross-linking agent at least comprises one reactive group; the reactive group is one of carboxyl, aldehyde group and amido. According to the invention, an adjustable semi-interpenetrating network cross-linking layer is formed on the surface of the porous carrier through the cross-linking reaction of the polyol compound and the anionic polymer with the cross-linking agent, so that the separation membrane can be used in caustic feed liquid for a long time, the separation precision is adjustable, and the scale inhibition performance is good.

The present disclosure provides a solid electrolyte material capable of suppressing a decrease in ion conductivity. The solid electrolyte material is characterized by containing a polymer electrolyte, an inorganic filler, and butanedinitrile, and the polymer electrolyte contains an anionic polymer.

This invention discloses a reusable cover film and its preparation method, comprising: compositing an outer polyester film and an inner heat-sealable polyester film to form a pressure-sensitive adhesive layer and a release layer; coating an anti-fog coating on the outer side of the inner heat-sealable polyester film; performing bidirectional half-cutting on the cover film substrate to form staggered first and second half-cuts; and partially removing the pressure-sensitive adhesive at the starting end of the opening path to form a non-adhesive gripping part. A silver-based antibacterial agent and a silane coupling agent are added to the release layer, and an anionic polymer is added to the pressure-sensitive adhesive layer. The two react with electrostatic adsorption and coordination at the interface, and the aminated polymer in the pressure-sensitive adhesive can partially reduce silver ions to silver nanoparticles in situ, forming an interfacial gradient. This invention enables the cover film to have reusable opening, anti-fog, and antibacterial functions, stable opening force, reliable closing, and all layers are made of polyester material for easy recycling.

Living polymers prepared by organolithium initiated polymerization of conjugated diene monomer or copolymerization of conjugated diene and vinyl aromatic monomers are efficiently coupled by using a functionalized siloxane oligomer blend as coupling agent. Diene rubber compositions partially coupled with functionalized siloxane oligomer blends exhibit broad molecular weight distribution, increased throughput in their industrial processing, as well as faster dissolution in recipes to produce rubber toughened plastics such as HIPS and ABS. Radial styrene-butadiene block copolymers as well as their corresponding hydrogenated block copolymers achieved excellent thermoplastic elastomer performance and can be used for hotmelt adhesives, sealants, asphalt modification, footwear; technical compounds, thermoplastic gels, films or elastic fibers.

The present invention relates to enhancement and stabilization of proteolytic activity of proteases. The present invention discloses a method for enhancing and / or stabilizing the proteolytic activity of a protease, characterized in that said method comprises (i) contacting the protease with a reducing agent wherein the cysteine residues of the protease are maintained in the reduced state, (ii) removing substantially all of the oxygen from the area surrounding the protease, and (ii) removing the cysteine residues of the protease from the reducing agent. And (iii) binding the protease to an anionic polymer matrix such that the protease is non-covalently bound to the anionic polymer matrix.

The present invention relates to an assembly comprising a carbon nanotube coated successively with: a primary coating resulting from the polymerisation of an amphiphilic diynic compound bearing an anionic or cationic group; optionally an intermediate coating of a cationic or anionic polymer; and a final coating of a porphyrin derivative which is either an anionic porphyrin or a cationic porphyrin, the coatings being linked to each other by electrostatic interactions. The present invention relates also to a method to prepare such an assembly and to its use as a photocatalyst, especially in a water medium, in particular in oxidation reactions, and for the production of singlet oxygen which is especially useful for disinfection or photodynamic therapy (PDT).

The present invention relates to a composite material useful for purifying large biomolecules, such as proteins, viruses, virus-like particles, and extracellular vesicles, obtained from biological raw materials. The composite material of the present invention comprises a porous support loaded with a first polymer, which is a cross-linked cationic polymer, and a second polymer, which is an anionic polymer, covalently attached to the outer surface of the porous support loaded with the cross-linked polymer.

The application provides an anti-220 DEG C saturated salt environment-friendly water-based drilling fluid and a preparation method and application thereof.The anti-220 DEG C saturated salt environment-friendly water-based drilling fluid comprises the following raw materials in parts by weight: 100 parts of water, 1-4 parts of a composite soil cutting agent, 0.2-0.6 parts of sodium hydroxide, 3-6 parts of an anti-high-temperature and anti-salt zwitterionic polymer, 2-4 parts of an anti-high-temperature and anti-salt anionic polymer, 3-5 parts of an alcohol amine inhibitor, 6-10 parts of organic-inorganic hybrid microsphere plugging agent, 2-4 parts of a strong adsorption anti-sloughing plugging agent, 3-4 parts of a composite oil lubricant, and 0.5-1 parts of a system stabilizer.The water-based drilling fluid can maintain good rheological properties, filtration loss, plugging and anti-sloughing properties under the condition of 220 DEG C or above, saturated sodium chloride and 3% calcium chloride.The drilling fluid system does not contain sulfonated materials, the treatment agent used has strong high-temperature and high-salt resistance, is not decomposed under high-temperature and high-salt conditions, and has good environmental protection performance.

A solid electrolyte material capable of suppressing a decrease in ionic conductivity is provided. The solid electrolyte material includes a polymer electrolyte, an inorganic filler, and succinonitrile, wherein the polymer electrolyte includes an anionic polymer.

The invention discloses a preparation method of a composite anion exchange membrane for AEM electrolyzed water. The preparation method comprises the following steps: using ePTFE as a supporting layer; comprising the following steps: dissolving a surfactant in an organic solvent to obtain a hydrophilic modifier; comprising the following steps: soaking an ePTFE membrane in a hydrophilic modifier, and then carrying out drying treatment; comprising the step of compounding anion exchange resin slurry and hydrophilic modified ePTFE to prepare the AEM membrane. Through hydrophilic modification treatment, the anionic polymer and ePTFE are better infiltrated and combined, the membrane resistance can be further reduced, and the conductive property of the membrane is improved.