252 results about "Adipic Dihydrazide" patented technology

The invention relates to a preparation method of injectable natural polysaccharide self-healing hydrogel. The preparation method of the injectable natural polysaccharide self-healing hydrogel comprises the following steps: firstly synthesizing water soluble N-carboxyethyl chitosan by carrying out a Michael addition reaction on acrylic acid and chitosan, carrying out an oxidization reaction on sodium periodate and sodium alginate to obtain oxidized sodium alginate, then carrying out a dehydration condensation reaction on N-carboxyethyl chitosan and oxidized sodium alginate and on adipic dihydrazide and oxidized sodium alginate in a phosphate buffer liquid at the temperature of 37 DEG C, so as to respectively generate invertible imine bond and acylhydrazone bond, and finally preparing injectable natural polysaccharide macromolecular hydrogel with self-healing property. The preparation method of the injectable natural polysaccharide self-healing hydrogel has the advantages that a synthetic process of the injectable self-healing hydrogel is simple and green, reaction conditions are mild, the injectable self-healing hydrogel can form gel in a physiological environment and has self-healing capability, and the injectable self-healing hydrogel has a good application prospect in the fields of drug sustained release and the like.

The invention discloses a single-component water-based polyurethane/acrylate composite resin capable of being cured at room temperature and a preparation method thereof. The preparation method comprises the steps of mixing keto-containing water-based polyurethane resin with keto-containing water-based acrylate resin in a mass ratio of 1:1 and then adding a crosslinking agent adipic dihydrazide accounting for 50% of total keto molar weight, so as to obtain the single-component water-based polyurethane/acrylate composite resin capable of being cured at room temperature. According to the invention, the preparation process of the single-component water-based polyurethane/acrylate composite resin capable of being cured at room temperature is simple, and crosslinking composition and curing are synchronously carried out. The single-component water-based polyurethane/acrylate composite resin capable of being cured at room temperature is stable in property; and by detection according to the HG/T3828-2006 'indoor water-based woodware paint' standard, the water resistance and alcohol resistance of the composite resin are qualified, and the hardness of the composite resin is 2H.

The invention relates to a polyacrylic woodware emulsion with a core-shell bi-crosslinking structure and a preparation method thereof. The polyacrylic woodware emulsion is prepared from the following components: methyl methacrylate, butyl methacrylate, methacrylic acid, a crosslinking monomer, butyl acrylate, methacrylic acid-2-hydroxy ethyl, diacetone acrylamide, adipic dihydrazide, an initiator, an emulsifier, and deionized water. Through molecular design of the polyacrylic emulsion with hard core and soft shell, the hard core provides the hardness and mechanical strength of a coating film and improves the stain resistance of a paint film, and the soft shell can improve the film-forming property of coating film, has no need for film-forming assistant, reduces VOC emission, and improves the low temperature resistance of the coating film. By means of the core-shell bi-crosslinking system, the hardness and water resistance of the paint film are improved.

The present invention discloses a preparation method of a cationic organosilicon modified waterborne PUA fabric coating adhesive with a self crosslinking structure, the method is as follows:(1)using polyisocyanate and hydroxyl-terminated polysiloxane for synthesis of an-NCO-group-terminated prepolymer;(2)adding polyether or polyester glycol for reaction;(3)reacting with a cationic hydrophilic chain extender for a period of time, and further reacting with adipic dihydrazide(ADH)to obtain a hydrazine-terminated cationic waterborne polyurethane emulsion;(4)using acrylate monomers and diacetone acrylamide(DAAM)for preparing a hydrazide-group-containing polyacrylate emulsion; and(5)mixing the hydrazine-terminated cationic waterborne polyurethane emulsion and the hydrazide-group-containing polyacrylate emulsion in a certain proportion to obtain the self-crosslinking cationic organosilicon modified waterborne PUA fabric coating adhesive. The self-crosslinking cationic organosilicon modified waterborne PUA fabric coating adhesive avoids the use of a harmful crosslinking agent, has the advantages of being environmental-friendly, high in water pressure resistance, good in mechanical properties, low in cost, and dyeable and the like, and can be used for coating finishing of nylon fabrics.

The invention discloses a preparation method of a double self cross-linking elastic emulsion. The method combines two post cross-linking modes: (1) adding multivalent metal ion compounds to carry out cross-linking reactions; (2) adding diacetone acrylamide into emulsion so as to make diacetone acrylamide participate in the emulsion copolymerization reactions during the emulsion polymerization process so as to introduce keto-carbonyl groups into the chains of copolymer, and then adding binary caprylic hydrazide such as adipic dihydrazide into the emulsion so as to obtain the self cross-linking elastic emulsion. A diacetone-acrylamide and binary caprylic hydrazide cross-linking system and a carboxylic acid and multivalent metal salt cross-linking system are both simultaneously induced into an acrylate emulsion polymerization system to replace an elastic emulsion system formed trough a single reactive cross-linking agent; thus the polymerization property and storage stability of emulsion are improved, the waterproof property, contamination resistant property, after-tack property, and elastic elongation rate of the surface of a coating coated by the elastic emulsion are all improved; and the coating product which adopts the two room temperature self cross-linking systems, has a good adhesive force and elasticity, and has a very good surface waterproof property.

The present invention relates to preparation method of aflatoxin immuno-affinity column, including steps of: preparation of hydrazine antibody: employing sodium periodate oxidating unconjugated active area Fc hydroxoy of antibody to aldehyde group, and reacting with adipic dihydrazide to gain hydrazine antibody; preparation of aldehyde solid substrate: oxidating solid substrate containing continued diol structure by sodium periodate to gain aldehyde solid substrate; coupling of antibody and solid substrate: mixing hydrazine antibody and aldehyde solid substrate, adding sodium borohydride to seal unreacted aldehyde group on solid substrate after oscillating reaction to gain coupling antibody solid substrate; column packed. The present invention couples the unconjugated active area Fc end of antibody to solid substrate to remain activity of antibody better; hydrazide derived on antibody instead of solid substrate to avoid nonspecific adsorption of hydrazide group; the combined affinity column not introducing new groups ( such as carboxyl, amido and so on) except coupling antibody to avoid nonspecific adsorption from them.

The invention discloses an ecological diatom coating and a preparation method thereof. Adipic dihydrazide prepared from diatomite, titanium dioxide, polyacrylate emulsion, antibacterial agent BIT and tourmaline loaded nano titanium dioxide through stirring is taken as a formaldehyde catching agent, the tourmaline loaded nano titanium dioxide is taken as an air cleaning catalyst, polyacrylic acid is taken as a thickener, and sodium polyacrylate is taken as a dispersing agent. The diatom ooze decorative wall material has the main functional material diatomite which has a porous structure, thus being capable of regulating the indoor temperature and humidity. The preparation method is simple and easy to carry out. The formula adopts the polyacrylate emulsion, and the glass transition temperature is 10-14 DEG C, so that film-forming agent is not needed, the ecological diatom coating does not volatilize toxic gases and is more environment-friendly; furthermore, the formula adopts the thickener, so that both the thickening capacity and dispersing capacity of the coating are improved; the step of dissolving in advance is saved in preparation, so that the preparation steps are simplified, the production cost of enterprises is lowered, therefore, the coating is an ideal ecological diatom coating.

The invention relates to the preparation of a growth factor porous micro-sphere compound system coated by an injectable hydrogel. The preparation is characterized by comprising a first component, namely HA-ADH sol obtained by cross-linking of hyaluronic acid (HA) and adipic dihydrazide (ADH), and polylactic acid (PLLA) porous micro-spheres which are carried with growth factors and loaded in the first component. The compound system is capable of degrading and slowly releasing the growth factors under physiological conditions, so that the slow releasing of the growth factors in a body is realized, and the problems that the growth factors are released too fast and an action period is too short are solved, thereby reaching the effect of neural restoration.

The invention relates to a room-temperature self-crosslinking wood lacquer emulsion which is characterized by being prepared from the following components: methyl methacrylate, styrene, butyl acrylate, diacetone-acryloamide, glycidyl methacrylate, methacrylic acid, polycarbodiimide resin, adipic dihydrazide, an emulsifier, an initiator, a neutralizer, a molecular weight regulator and deionized water. The preparation method comprises the following steps: adding 10-50% of emulsifier aqueous solution into a reaction kettle, stirring and raising the temperature; in an emulsifying kettle, sequentially adding monomer materials into the residual emulsifier aqueous solution in a high speed disperse state and stirring; then, adding 5% of monomer pre-emulsion into the reaction kettle, adding an initiator solution, and starting to add the residual emulsion and initiator solution dropwise when the temperature of the reaction kettle reaches 80 DEG C, and then starting cooling the reaction kettle; and adding the neutralizer, adipic dihydrazide and polycarbodiimide resin into the reaction kettle, stirring for 30-40 minutes and filtering and packaging. According to the room-temperature self-crosslinking wood lacquer emulsion provided by the invention, cross-linking reaction of diacetone-acryloamide and adipic dihydrazide, polycarbodiimide resin and methacrylic acid is adopted, and the double crosslinking reaction is of great benefit to enhancing the adhesive property of a film.

The invention discloses an elastic emulsion paint which is prepared from raw materials of deionized water, adipic dihydrazide, hydroxyethylcellulose, propanediol, 215 titanium dioxide, wollastonite powder, kaolin, 800 coarse whiting, waterborne fluorocarbon resin, styrene-acrylic emulsion, elastic emulsion, and the like in dispersive mixing way. With good expansion rate, the elastic emulsion of the invention can be painted in brushing, rolling and spraying way, is provided with breakthrough in stain resistance and hydrophobic property and has the advantages of waterproof and breathable performance, strong anti-pollution performance, alkali and acid resistance and lasting weather resistance.

The invention relates to the technical field of acrylic emulsions, and particularly relates to a self-crosslinking acrylic emulsion and a preparation method thereof. The self-crosslinking acrylic emulsion is prepared from the following raw materials in parts by weight: a component A, namely 130-150 parts of crylic acid solid resin, 350-450 parts of water and 40-60 parts of ammonium hydroxide or monoethanolamine or triethanolamine, a component B, namely 5-12 parts of an emulsifier and 15-25 parts of water, a component C, namely 1-3 parts of persulfate and 5-12 parts of water, a component D 1, namely 85-95 parts of methyl methacrylate and 70-80 parts of ethyl acrylate, a component D 2, namely 85-95 parts of methyl methacrylate and 70-80 parts of ethyl acrylate, a component E, namely 0.8-1.5 parts of persulfate and 5-15 parts of water, a component F, namely 5-12 parts of diacetone-acryloamide and 25-35 parts of water, and a component G, namely 2-5 parts of adipic dihydrazide and 25-35 parts of water. The self-crosslinking acrylic emulsion does not contain a toxic solvent, so that the VOC content is low; and the self-crosslinking acrylic emulsion does not contain TDI and various heavy metals, so that the self-crosslinking acrylic emulsion is environment-friendly and safe, has the advantages of relatively good levelling property and film surface smoothness, shows a bright effect after forming a film, and is free of a white scar or dusting when rubbed and kneaded.

The present invention discloses heparin or heparin salt modified graphene oxide and a preparation method and application thereof, the modified graphene oxide can be used as a drug, particularly an anti-cancer drug carrier material. By use of pH sensitive principle, adipic dihydrazide is used as a linker molecule, or by use of redox principle, cystamine is used as a linker molecule, heparin is used for chemically modifying graphene oxide, and the heparin has the advantages of increase of water solubility and anti-cancer drug tumor synergistic effect of graphene oxide, and solves the problems of poor water solubility and easy aggregation and the like of the graphene oxide.

The invention discloses waterborne wood lacquer which consists of component A and component B, wherein, component A is obtained by dispersing and mixing deionized water, adipic dihydrazide, droxyethylcellulose, 215 titanium white powder, wollastonite powder, kaolin, 800-mesh heavy calcium carbonate and other raw materials; component B is prepared by dispersing and mixing water-based fluorocarbon resin, water-soluble acrylic resin, film-forming assistant and other raw materials. During use, component A and component B are mixed by the weight ratio of 1:1, and brush coating, roll coating and spray coating with the lacquer can be conducted after an appropriate amount of water is added to be stirred evenly. The waterborne wood lacquer of the invention is waterproof and permeable, has good weather and water resistant, strong adhesion force, and has excellent performance in particular in lustrousness and hydrophobicity.

The invention relates to a preparation method of a crosslinked polymer cement waterproof coating, which comprises the following steps: (a) mixing diacetone acrylamide with other polymerizable acrylic monomers and adding a surfactant for pre-emulsification; taking a part of pre-emulsified monomers, increasing the temperature to 60-90 DEG C, adding an initiator for polymerization reaction and then adding the left pre-emulsified monomers and an initiator within 0.2-1 hour for polymerization reaction at the temperature of 60-90 DEG C to obtain polymer emulsion; (b), adding an alkali agent and adipic dihydrazide into the polymer emulsion in the step (a); and (c), uniformly agitating the neutralized and activated polymer emulsion and a mixed filler during the construction to obtain the crosslinked polymer cement waterproof coating. The preparation method is simple, is low in cost and is suitable for industrial production; and the crosslinked polymer cement waterproof coating prepared by the method has a cement water reducing effect, can improve the cement strength and can be formed at the room temperature.