43 results about "Polyaziridine" patented technology

The invention relates to a process for reducing the monomeric aziridine content in a polyaziridine forming reaction mixture by adding to the polyaziridine forming reaction mixture an excess of a carbodiimide scavenger wherein the excess is based on the equivalent ratio of scavenger to monomeric aziridine, and to a product obtained by this process and to a coating composition containing the product obtained by the process.

The invention discloses an environment-friendly high strength profile control water shut-off agent and a preparation method thereof, and aims to solve the problems that conventional water shut-off agents are pollutant, and long-term use of the conventional water shut-off agent will pollute the environment and harm the human body. The water shut-off agent is composed of high polymers, a cross-linking agent, a catalyst, an antioxidant, and water. Through the organic cooperation among high polymers, a cross-linking agent, and a catalyst, a high strength, environment-friendly, and non-toxic profile control water shut-off agent is prepared, and the water shut-off agent can be widely applied to water shut-off operations of various oil reservoir profile controls. Polyaziridine is taken as the cross-linking agent, and the prepared gel has the advantages of deeper processing ground layer, higher strength, better stability, environment-friendliness, and no toxicity. Experiment results have proven that the water shut-off agent can well improve the profile performance and the water shut-off performance, is capable of being applied to the oil fields, and can improve the development effect of oil field water injection. The water shut-off agent is compounded by high polymers, a cross-linking agent, an antioxidant, and the like, and can be widely applied to water shut-off operations of various oil reservoir profile controls.

The invention relates to the technical field of composite conductive materials, in particular to a preparation method of a polyurethane/carboxymethyl chitosan/polyaniline conductive film. The preparation method comprises the steps: firstly, mixing a polyurethane water dispersion solution, a chitosan solution and a polyaziridine cross-linking agent solution, dipping a film into an acidic solution containing an aniline monomer for curing after film coating, adding an acidic solution containing an oxidizing agent into a coagulation bath after formation, enabling aniline to produce polymerizationreaction so as to generate polyaniline, and finally obtaining the polyurethane/carboxymethyl chitosan/polyaniline composite conductive film, wherein the prepared polyaniline not only grows on the surface of PU, but also grows and polymerizes in the interior so that the formed polyaniline film can not only cover the surface of the PU matrix film, but also penetrate into the film, the effective adsorption of polyaniline is really completed, and the composite material has excellent conductivity. Compared with an existing method for preparing the polyurethane composite conductive film, the methodhas the advantages that the preparation process conditions are easy to achieve, and the conductive property of the composite material is excellent.

The invention discloses a preparation method of a degradable acid-sensitive polyaspartamide copolymer and a use of the degradable acid-sensitive polyaspartamide copolymer as a drug and a gene co-transmission nanoparticle. Hydrophilic and hydrophobic sections of the degradable acid-sensitive polyaspartamide copolymer respectively comprise aziridine-grafted polyaspartic acid and acetalated dextran, and a molecular weight ratio of the aziridine-grafted polyaspartic acid to acetalated dextran is 1: 1-10. The preparation method comprises that dextran undergoes an acetalation reaction, the reaction product is bonded to nitrine-terminated poly(b-benzyl-L-aspartate), through a benzyl ester aminolysis reaction, and the combined product is bonded to polyaziridine so that an acetalated dextran-polyaziridine-grafted polyaspartic acid derivative with acid sensitivity and degradability is prepared. The copolymer can form nanoparticles with uniform particle sizes and stability by a double emulsification method, and can be combined with a carrying drug and a gene and realizes targeting conveying to tumor cells so that tumor chemotherapy and gene treatment synergism is obtained. The copolymer has a wide application prospect in the field of tumor treatment.

The invention discloses a high electromagnetic wave reflection unmanned automobile coating composition and an application thereof, the viscosity is 20-25s, the high-electromagnetic-wave-reflection unmanned automobile coating composition is composed of epoxy resin, polyurethane, polyaziridine, hydroxymethyl cellulose, COFs coated carbon fiber, p-xylylenediamine and water, and the COFs coated carbonfiber is composed of aminated carbon fiber, a dialdehyde monomer, 1,3,5-tri(4-aminophenyl) benzene, TEMPO, n-diisopropylethylamine and CuI. The introduced COFs can effectively improve the compatibility of the carbon fiber and the matrix resin; the COFs coated carbon fiber containing stable free radicals TEMPO can provide free electrons, an induction field is generated under electromagnetic wave radiation, and then electromagnetic waves can be effectively reflected.

The invention provides a novel primer for producing a plastic with an inorganic film, which is closely connected to the inorganic film and a plastic substrate, and will not generate cracks that can be seen by eyes, interference fringes and obvious whitening parts on the inorganic film even the plastic with inorganic film is processed under high temperature. The primer uses an acrylic acid copolymer (A) having carboxylate anion group with a vitrification temperature of minus 5-120 DEG and a polyaziridine compound (B) having at least three aziridinyls.

The invention relates to the field of materials, in particular to a polyethylene foam material and a preparation method thereof. The polyethylene foam material comprises the following components in parts by weight: 10-25 parts of low-density polyethylene, 0.5-2 parts of mica powder, 1-2 parts of maleic anhydride grafted polyethylene, 5-10 parts of chitosan, 1-3 parts of a polyaziridine cross-linking agent, 1-3 parts of a flame retardant and 2-4 parts of a foaming agent. Through cooperation and interaction of different components, the prepared polyethylene foam material is obviously improved in structural stability, mechanical strength, heat resistance and flame retardant effect, meanwhile, the components have antibacterial and preservative effects, and breeding of bacteria and fungi in high-humidity environments such as fruit packaging and the like can be effectively reduced.

The invention relates to the field of conductive materials, in particular to a preparation method of a flexible conductive material taking copper sulfide and carbon nanotubes as composite conductive agents. The method comprises the steps as follows: firstly, mixing a dimethylformamide solution of polyacrylonitrile with an aqueous dispersion of carbon nanotubes/aziridine cross-linking agent, immersing a product in a coagulation bath solution for curing after film coating, and preparing the flexible conductive material taking copper sulfide and carbon nanotubes as the composite conductive agentsby a chemical reaction on the basis. A polyacrylonitrile film obtained by blending modification of a carbon nanotube/aziridine cross-linking agent has good flexibility, and furthermore, water in thedispersion plays the role of a pore-forming agent in the membrane forming process. The polyaziridine cross-linking agent/polyacrylonitrile film has a continuously distributed network pore structure, so that conductive copper sulfide is not only deposited on the surface of a flexible film, but also grows in the inside, formed copper sulfide can not only cover the surface of the flexible substrate film, but also penetrate to inside of the film, and the composite material has excellent conductive performance.

The invention relates to the technical field of functional material preparation, and in particular relates to a preparation method of a carboxyl nitrile rubber composite membrane for electromagnetic shielding. The preparation method comprises the following steps: firstly, mixing nano carbon black, a carboxyl nitrile rubber emulsion and a polyaziridine cross-linking agent solution, carrying out film coating, immersing the obtained film into a solution containing copper sulfate for curing, and adding a sodium thiosulfate water solution into the copper sulfate solution after the film is formed, and carrying out heating for a reaction to generate copper sulfide by adopting a chemical bath method to finally obtain the carboxyl nitrile rubber composite film for electromagnetic shielding. The copper sulfate prepared by the method not only grows on the surface of the nitrile rubber, but also is grown and polymerized in the inner part, so that the formed copper sulfate not only can cover the surface of a nitrile rubber substrate film, but also can penetrates into the inner part of the film, so that effective adsorption of copper sulfide is really completed, and the composite material has excellent electromagnetic shielding performance.

The invention discloses a new water-based environmental-protection material for replacing a PET matt membrane and a preparation method thereof. The new water-based environmental-protection material for replacing the PET matt membrane includes a raw material A, a raw material B and a raw material C, wherein the raw material A comprises the following components: water-based frosted gloss oil, pure water, polyamine wear-resistant microspheres, nano silicon dioxide, an organic extinction agent and a leveling agent; the raw material B includes pure water; the raw material C includes carbodiimide and polyaziridine; the water-based frosted gloss oil includes water-based polyurethane resin, ethanol and a film forming auxiliary agent. The prepared new water-based environmental-protection material for replacing the PET matt membrane has the main components of water-based substances, cannot cause harm to human bodies, and has the advantages of strong adhesion force, low matte degree and good appearance effect. The preparation method is suitable for promotion, and the quality of the product is better.

The invention discloses a volatile waterborne polyurethane coating and a preparation method thereof. The coating comprises the following components in parts by weight: 15 to 45 parts of neopentyl glycol, 5 to 20 parts of adipic acid, 10 to 30 parts of benzenetrimellitic anhydride, 5 to 15 parts of tetraisopropyl titanate, 20 to 30 parts of xylene, 10 to 30 parts of acetone, 15 to 30 parts of 10% phosphoric acid (toluene) liquid, 10 to 20 parts of 50% phenol (toluene) liquid, 5 to 15 parts of N-toluene diethanolamine, 10 to 30 parts of triethylamine, 5 to 15 parts of ethylenediamine, 5 to 15 parts of organic silicon resin, 20 to 40 parts of an adhesive, 10 to 30 parts of a thickening agent and 10 to 30 parts of deionized water. According to the volatile waterborne polyurethane coating, the organic silicon resin is added, so that the adhesiveness between different substrates for synthetic leather and a polyurethane coating material can be enhanced, the coating property and the adhesive force are correspondingly improved, meanwhile, the hydrolysis-resistant and smooth feeling is brought, and the volatile waterborne polyurethane coating can replace a toxic polyaziridine cross-linking agent.

A glass mat is provided. The glass mat includes an assembly of glass fibers; and a binder composition including a polymer resin and a crosslinker. The polymer resin has a pH of at least about 5.0. Thepolymer resin includes a styrenic copolymer, an acrylic copolymer, or combination thereof having at least one functional group of a carboxylic acid, a salt of a carboxylic acid, an anhydride, a saltof an anhydride, or combination thereof. The crosslinker includes a polyol, a polyepoxy, a polycarbodiimide, a polyaziridine, a bivalent metal carbonate, or combination thereof. Further provided is amethod of making the glass mat.

The invention relates to the technical field of functional material preparation, and especially relates to a preparation method of a flexible carboxylated nitrile butadiene rubber composite conductivefilm. The preparation method comprises the following steps: mixing of a carboxylated nitrile butadiene rubber emulsion with a polyaziridine crosslinker solution, film coating, immersion in a copper sulfate-containing solution for solidification, addition of an aqueous sodium thiosulfate solution to the copper sulfate solution after molding, heating, and a chemical bath process reaction for finally obtaining the carboxylated nitrile butadiene rubber composite conductive film. The copper sulfate prepared by the method grows on the surface of the nitrile butadiene rubber, and also grows and polymerizes inside the nitrile butadiene rubber, so the formed copper sulfate covers the surface of a nitrile butadiene rubber matrix film and penetrates into the film to completely complete the effectiveadsorption of copper sulfide, thereby the composite film has an excellent conductive property.

Disclosed are waterborne coating compositions that include: (a) a base-neutralized carboxylic acid functional polyacrylate; and (b) a water-miscible polyaziridine, in which the composition is substantially free of isocyanate functionality. Also disclosed are methods of using such compositions to produce a dry-erase surface and kits that include such compositions.

The invention provides a leather finishing composition with washable jeans style and a leather manufacturing process, and relates to the field of leather production and manufacturing. According to theinvention, blue pigment paste contained in the coating composition is used, in the production process, a roller coater with sheepskin lines is used for coating the surface of leather with the coatingcomposition in a rolling mode, milling is conducted under the condition that the coating composition is not completely dried, and therefore the style of a leather finished product produced and manufactured through the method is similar to that of jeans cloth; a polyaziridine cross-linking agent is added into the coating composition for cross-linking, so that the leather coating has the characteristics of water resistance, washing resistance and high temperature resistance; the innovation point of the coating composition is that more grease and wax are added into the coating composition, and the grease, the wax and the cross-linking agent can be cross-linked, so that the strength and the flexibility of a coating film are favorably improved, and this is also the reason why the leather produced by the invention can be washed with water without affecting the leather hand feeling and color.

The invention discloses a dispersing agent for improving the softness and the toughness of a cathode plate. The preparation method comprises the following steps: mixing dihydroxy succinic acid with polyaziridine; reacting to obtain polyimide with hydroxyl; taking polyimide as a skeleton of a dispersing agent to be prepared, grafting solvated chains on the obtained polyimide, and carrying out mixedreaction on the grafted polymer and an oxide formed by removing one molecule of water from orthophosphate or one or two molecules of inorganic acid so as to prepare the finished dispersing agent. According to the dispersing agent for improving the softness and the toughness of the cathode plate, the dispersing agent can obviously improve the softness and the toughness of the cathode plate; dihydroxy succinic acid and polyaziridine are mixed and react to obtain polyimide with hydroxyl, the obtained polyimide is grafted with a solvation chain, and the grafted polymer reacts with acid anhydrideso that the cathode plate is more flexible, the conductivity of the cathode plate is improved, and the dispersing agent has a wide application prospect.