498 results about "Hydrazide" patented technology

The invention relates to the technical field of high polymer materials, and particularly provides a self-repairing type UV curing alumite color layer coating and a preparation method thereof. The water-based ink is prepared from, by weight, 30-50 parts of polyurethane acrylic resin, 10-25 parts of modified acrylic oligomer containing dynamic covalent bonds, 2-5 parts of photoinitiator, 3-8 parts of hydrophobic modified nano filler and 1-3 parts of cross-linking agent, and the dynamic covalent bonds are selected from at least one of hydrazide bonds, boric acid ester bonds and Diels-Alder bonds. By introducing a gradient energy collaborative network of dynamic covalent bonds and quadruple hydrogen bonds, rapid self-repairing of the coating at normal temperature and thermal triggering recombination of deep damage are achieved, and meanwhile through the micro-phase separation design of the hydrophobic core-shell filler and the graft modified silicon carbide nanowires, the hydrolysis resistance is improved.

The invention discloses multifunctional hydrogel and application thereof, and belongs to the technical field of biological medicine. According to the multifunctional hydrogel, ketal mercaptan with two hydrazide ends and oxidized dextran are cross-linked to form a cross-linked network containing dynamic covalent bonds. The preparation method comprises the following steps: dissolving ketal mercaptan with two hydrazide ends in deionized water to obtain a ketal mercaptan solution, dissolving oxidized dextran in deionized water to obtain an oxidized dextran solution, mixing the ketal mercaptan solution with the oxidized dextran solution, and standing to obtain the multifunctional hydrogel. The multifunctional hydrogel has pH / ROS dual responsiveness, can respond to inflammation microenvironment and low pH of infectious wounds, remove active oxygen, release therapeutic drugs, regulate macrophage polarization and relieve bacterial infection, thereby playing a key role in inflammation, proliferation and remodeling stages of wound healing to accelerate wound healing. The curcumin-encapsulated liposome is added into the multifunctional hydrogel, so that the antibacterial effect can be further improved.

The invention discloses an organic plugging agent, a preparation method thereof and application of the organic plugging agent to inhibition of SAGD steam cavity edge water invasion. The organic plugging agent is prepared from the following raw materials: epoxy resin, a curing agent, nano aerogel, mineral fibers, plant fibers, a reactive diluent, a heat stabilizer and water, the epoxy resin is at least one of glycidyl amine epoxy resin and alicyclic epoxy resin; the curing agent is at least one of amino resin, dicyandiamide and hydrazide; the heat stabilizer is at least one of thiourea, sodium thiosulfate and cobalt chloride. The organic plugging agent is excellent in high temperature resistance, mineralization resistance and plugging performance, the organic plugging agent, nitrogen and an inorganic plugging agent are injected into a water plugging system of an SAGD steam cavity edge well in a slug mode, the organic plugging agent is applied to SAGD high-temperature and high-leakage well conditions, and the SAGD production effect can be effectively improved.

The invention generally relates to nuclear transport modulators, e.g., CRM1 inhibitors, and more particularly to a compound represented by structural formula I.or a pharmaceutically acceptable salt thereof, wherein the values and alternative values for the variables are as defined and described herein. The invention also includes the synthesis and use of a compound of structural formula I, or a pharmaceutically acceptable salt or composition thereof, e.g., in the treatment, modulation and / or prevention of physiological conditions associated with CRM1 activity.

The invention belongs to the technical field of membrane separation, and aims to provide a preparation method and application of a covalent organic framework bipolar membrane. The method comprises the following steps: combining at least one amine, hydrazide or aldehyde monomer containing ionic groups with a monomer without ionic groups, and respectively synthesizing covalent organic framework COF nanosheets with positive charges and negative charges through a one-pot method under the condition of coexistence of an acid catalyst and an organic solvent; sequentially depositing COF nanosheets with positive and negative charges on the surface of the porous carrier by a hot solvent evaporation method; by constructing two COF separation layers with regular pore channels and opposite electrical properties, the covalent organic framework bipolar membrane with charge asymmetry is finally obtained. The product provided by the invention has high selectivity, can realize efficient separation of protons and metal cations, and significantly improves the extraction and recovery purity of hydrochloric acid; through charge repulsion and pore size screening mechanisms, separation of different anions can be further realized, and selective recovery of acid molecules is enhanced.

The invention discloses a double-response collagen-based conductive hydrogel, a medicine and a preparation and application method of the double-response collagen-based conductive hydrogel. The preparation method of the double-response collagen-based conductive hydrogel comprises the following steps: carrying out chemical modification on polysaccharide through 3-aminophenylboronic acid, and then carrying out sodium periodate oxidation treatment to obtain a dialdehyde polysaccharide grafted aminophenylboronic acid copolymer; the preparation method comprises the following steps: performing hydrazide modification on collagen through adipic acid dihydrazide, and performing free radical polymerization with aniline to obtain a hydrazide collagen grafted polyaniline copolymer; the dialdehyde polysaccharide grafted aminophenylboronic acid copolymer and the hydrazide collagen grafted polyaniline copolymer are subjected to crosslinking, and the double-response collagen-based conductive hydrogel capable of responding to glucose and the pH value is obtained. Compared with single-response conductive hydrogel, the hydrogel can specifically respond to the microenvironment of chronic diabetic wound surfaces and release antibacterial and anti-inflammatory drugs, and high-quality healing of chronic wounds such as diabetic foot ulcers and the like is promoted.

The invention relates to the technical field of concrete materials, and discloses a hydrophobic antibacterial material, a preparation method and environment-friendly hydrophobic antibacterial concrete. The preparation method of the hydrophobic antibacterial material comprises the following steps: enabling 2, 3-dihydroxy terephthalic dihydrazide to react with 3-hydroxy-4-methoxybenzaldehyde to obtain an intermediate product, and then enabling the intermediate product to react with terephthaloyl chloride and 1, 2-epoxyoctane in sequence to obtain a multifunctional agent; carrying out load modification on the multifunctional agent to obtain a modified multifunctional agent; performing surface treatment on the modified multifunctional agent to obtain an aminated modified multifunctional agent; the amination modified multifunctional agent is treated with functionalized polydimethylsiloxane, and a composite multifunctional agent is obtained; the composite multifunctional agent and the modified composite nano material are combined to obtain a hydrophobic antibacterial material, and the hydrophobic antibacterial material is added into concrete to obtain the environment-friendly hydrophobic antibacterial concrete. The environment-friendly hydrophobic antibacterial concrete disclosed by the invention has good antibacterial performance, hydrophobic anti-seepage performance and self-repairing performance.

The invention discloses a rubber composition for tire crown components, specifically related to the field of rubber, including the following raw materials by weight: 100 parts of diene rubber, 0.3-3 parts of hydrazide compounds, 40-160 parts of reinforcing fillers, 0-1.5 parts of low rolling resistance modifiers, 2-18 parts of silane coupling agents, vulcanization accelerators, vulcanizing agents, antioxidants, vulcanization activators, processing aids, resins and plasticizers. Hydrazide compounds can improve the compatibility between rubbers, and after complexing with zinc oxide, stabilize sulfur cross-linking bonds, thereby improving fatigue crack resistance, delaying crack initiation, reducing crack propagation rate, and improving physical property retention after aging. Low rolling resistance modifiers can react with the double bonds of synthetic diene rubbers in a trans-Diels-Alder reaction, which has the effect of reducing rolling resistance. Hydrazide compounds and low rolling resistance modifiers are used together, and the rubber composition has the performance of anti-fatigue, anti-crack growth, anti-collapse and block falling, low hysteresis loss, low heat generation, and low rolling resistance.

The invention relates to the field of biomedical materials, in particular to a nasal cavity hemostatic sponge and a preparation method thereof. According to the preparation method of the nasal cavity hemostatic sponge provided by the invention, the hyaluronic acid is grafted and modified by using the amino alcohol, and the gelatin is modified by using the hydrazide; dissolving the oxidized hyaluronate grafted and modified by amino alcohol in a buffer solution, and adding a calcium ion donor to form a first solution; dissolving hydrazide modified gelatin in a buffer solution, and adding polyphosphate to form a second solution; the first solution and the second solution are mixed to react to form hydrogel, and the hemostatic sponge is obtained after the formed hydrogel is subjected to a low-temperature gel freezing process. The nasal cavity hemostatic sponge prepared by the invention can effectively stop bleeding, and has excellent wet adhesion property, mechanical property and biocompatibility.

To provide an anisotropic conductive film which exhibits low temperature quick curability, and good adhesive strength and connection reliability, and can be stably slit in a narrow width.SOLUTION: An anisotropic conductive film has such a structure that a radical-polymerizable conductive particle-containing resin layer is laminated on a radical-polymerizable / anionic polymerizable insulating resin layer. The insulating resin layer contains: a radical polymerization initiator containing a film-formation component containing two kinds of phenoxy resins having different molecular weights, a radical-polymerizable component containing a first acrylic compound, an anionic polymerizable component containing an epoxy-based compound and an organic peroxide having a one-minute half-life temperature of 125°C or lower; and an anionic polymerization curing agent containing an organic acid hydrazide compound having a melting point of 160°C or lower. The conductive particle-containing resin layer contains a radical polymerization initiator containing a film-formation component containing a third phenoxy resin, a radical-polymerizable component containing a second acrylic compound, conductive particles and an organic peroxide having a one-minute half-life temperature of 125°C or lower.SELECTED DRAWING: Figure 1

The invention discloses a collecting agent capable of being used for quartz direct and reverse flotation and a preparation method and application of the collecting agent. The collecting agent consists of the following components in parts by weight: 1-5 parts of a cation collecting agent, 7-30 parts of an anion collecting agent and 10-25 parts of an emulsifier, the cation collecting agent is at least one of lauryl amine, coconut oil alkyl primary amine, octadecyl succinamide and daminozide; the anion collecting agent is at least one of oleic acid, oxidized paraffin soap, naphthenic acid soap, cottonseed oil soap, rosin soap and sodium dodecyl sulfate; the emulsifying agent is at least one of glycerol, Tween 80, isooctanol polyoxyethylene polyoxypropylene ether and tributyl phosphate. Based on the synergistic effect of all the components, the collecting agent can effectively modify the surface of quartz under the strong alkaline condition, hydrophobization of the surface of quartz ore is promoted, and therefore flotation separation of feldspar and quartz is achieved; the feldspar surface can be effectively modified under the strong acid condition, and whitening and purification of quartz concentrate are achieved.

The invention relates to a disaccharide-acylhydrazone or disaccharide-hydrazide connexon, a sugar engineering antibody based on the disaccharide-acylhydrazone or disaccharide-hydrazide connexon, a sugar chain fixed-point antibody-drug conjugate and application. Specifically, the invention provides a disaccharide-acylhydrazone or disaccharide-acylhydrazone connexon as shown in the following formula I. The disaccharide-acylhydrazone or disaccharide-acylhydrazone connexon can effectively modify a functional group or a cytotoxin drug at a glycosylation site at the Asn297 site of an Fc structural domain of an antibody in a site-specific manner. The preparation method of the sugar chain fixed-point antibody-drug conjugate (ADC) provided by the invention is simple and efficient, can reduce the use amount of small molecular drugs, enhance the hydrophilicity of ADC molecules and enrich the structure of ADC compounds, and has a great application prospect in ADC preparation. # imgabs0 #

According to the palladium adsorbent with the fluorescence indication function and the preparation method and application of the palladium adsorbent, an aldehyde compound is dispersed in a mixed solution of acid and water, a turbid liquid of a hydrazide compound and water is dropwise added into the obtained aldehyde compound turbid liquid, stirring reaction is conducted at the room temperature, and the palladium adsorbent with the fluorescence indication function is obtained. Different from a conventional two-step method in which an organic polymer needs to be synthesized firstly, the preparation method disclosed by the invention adopts a strategy of pre-activating an aldehyde monomer by using an acid catalyst, so that the nucleophilicity of an amino monomer is prevented from being reduced, the generation of a semi-amine aldehyde intermediate is accelerated, and the reaction efficiency is improved, so that Schiff base condensation can be rapidly synthesized in a water phase at room temperature, and precious metal catalysis is not needed; and batch production can be realized more easily. And the material has an optical indication performance while having an adsorption capacity on palladium, and can be recycled and reused after elution.

The invention provides a high-strength low-temperature-resistant polyurethane material and a preparation method thereof, and belongs to the technical field of polyurethane materials. According to the invention, polyether polyol and diisocyanate are taken as base materials, a hydrazide chain extender is introduced as a first chain extender, multiple hydrogen bonds contained in the first chain extender can form a physical cross-linked network, methacrylic acid modified cyclodextrin is introduced as a second chain extender, and a double-bond polymerization reaction is carried out under the action of an initiator to form a chemical cross-linked network. According to the invention, non-covalent bond multiple hydrogen bonds and covalent cross-linking are combined, and a physical cross-linked network formed by the non-covalent bond multiple hydrogen bonds is dissociated in the deformation process to fully dissipate energy, so that the material keeps excellent tensile property. Covalent cross-linking is mainly concentrated around cyclodextrin molecules, the cross-linking density of the material is improved by improving the double bond modification quantity, the movement of polymer chain segments is not excessively limited, the tensile strength of the polymer is improved, the elongation at break can be kept, the toughness is improved, and meanwhile, good low-temperature resistance is shown.

The invention belongs to the technical field of asphalt preparation, and provides a high-modulus composite modified asphalt material based on natural asphalt and a preparation method thereof. The method comprises the following steps: separating natural asphalt into a high-molecular asphaltene section and a medium-low-molecular colloid section, and preparing activated asphaltene and colloid sections through alkali treatment and spray drying; a styrene-butadiene-styrene block copolymer and a polyurethane prepolymer are taken as the basis, and a dynamic cross-linked polymer is synthesized through the steps of hydrazide treatment, boric acid group introduction, glutaraldehyde cross-linking and the like; organic modified clay and phenylated chitosan are prepared, a polyaniline composite material is prepared through in-situ polymerization of aniline, a PANI-clay-biomass compound is obtained, the ultraviolet absorption characteristic of polyaniline and the shielding effect of montmorillonite cooperate, the ultraviolet aging resistance of the material is improved, through multi-stage temperature control dispersion, the anti-aging performance of the material is improved, and the anti-aging performance of the material is improved. The various modified materials are compounded with a natural asphalt substrate to obtain the high-modulus composite modified asphalt material based on the natural asphalt.

The invention discloses HA-PAS hydrogel for enhancing cartilage repair of early osteoarthritis and a preparation method of the HA-PAS hydrogel. According to the hydrogel, formylated hyaluronic acid, hydrazide modified low-methoxyl pectin and phenylboronic acid modified alginate form a ternary polysaccharide skeleton, a double-dynamic cross-linked network is formed through acylhydrazone bonds and boric acid ester bonds, and a triple network structure is formed by combining permanent cross-linking catalyzed by horse radish peroxidase. The hydrogel integrates functional components such as nano-selenium, a pulullan-strontium chelate and a mesenchymal stem cell source exosome, so that multiple effects of resisting oxidation, resisting inflammation, promoting cartilage differentiation and repairing subchondral bones are achieved. The compression modulus of the hydrogel is 0.8-1.5 MPa, and the hydrogel can be injected for in-situ gelling and MMP responsive degradation, shows an excellent cartilage repair effect in animal experiments, and provides a new solution for treatment of early osteoarthritis.

The invention belongs to the technical field of rubber, and particularly relates to a rubber composition, a preparation method thereof and a truck tire using the rubber composition. The rubber composition is prepared from the following components in parts by mass: 100 parts of diene rubber, 0.2 to 1.5 parts of hydrazide compound, 0.2 to 1.5 parts of pyrazolone compound, 0 to 30 parts of liquid rubber, 20 to 120 parts of reinforcing filler, 0 to 10 parts of silane coupling agent, 2 to 10 parts of vulcanization activator, vulcanization accelerator, vulcanizing agent, antioxidant, resin and plasticizer. The heat generation of the tire can be obviously reduced, and meanwhile, the cutting resistance and tear resistance of the tire are improved, so that the damage resistance of the truck tire is improved.

The invention provides an ultralow-temperature-resistant bio-based polyurea-polyurethane adhesive and a preparation method of the ultralow-temperature-resistant bio-based polyurea-polyurethane adhesive. The adhesive is prepared from the following raw materials in molar ratio: 0.5 of polyhydric alcohol; 1.0 part of isocyanate; 1.6 to 1.8 parts of hydrazide; and 0.6 to 0.8 part of vanillin dimer. The adhesive prepared by the invention has a very good bonding effect on 304 stainless steel, and can be used at an ultralow temperature. A polymer network contains rich polar groups such as carbamate and urea bonds, and the polar groups can form hydrogen bonds or other chemical bonds with substances such as oxides on the surface of metal, so that the adhesive has relatively high adhesive capacity on various base materials. According to the invention, the cheap and environment-friendly bio-based chain extender is used as a raw material, and a flexible polymer chain is used as a soft segment, so that the adhesive is endowed with the use performance at ultralow temperature while the high shear strength of the adhesive is ensured.

The invention discloses a preparation method of a photo-thermal conversion-phase change heat storage polyurethane flexible film, and relates to the technical field of polyurethane phase change materials. According to the invention, polyethylene glycol is used as a polymeric monomer and a phase change heat storage substrate, diisocyanate and dimethylolbutyric acid are used as reaction monomers, any one of 3, 3-dithio-bis-propionyl hydrazide or (R, R)-3, 3 '-diseleno-bis (2-aminopropionic acid) is used as a cross-linking agent, and transition metal carboxylate and a nano photo-thermal conversion agent are introduced to prepare the phase change heat storage material. And the polyurethane flexible film with photo-thermal conversion-phase change heat storage is prepared. A hydrazide group at the tail end of a cross-linking agent and an isocyanate group are subjected to nucleophilic addition reaction to generate a hydrazide-urea structure of which the main chain contains disulfide bonds and constructs multiple hydrogen bonds, and meanwhile, a metal carboxylate coordination bond is introduced, so that the film is endowed with an excellent mechanical response effect in a wide temperature range; the nano photo-thermal conversion agent is added into the system, so that the system has good photo-thermal conversion performance.

The invention discloses an epoxy modified room-temperature self-crosslinking water-based acrylate dispersion as well as a preparation method and application thereof, and belongs to the field of water-based acrylic resin. The dispersoid is obtained by extracting an organic solvent from an acrylate polymer, adjusting the pH value to 7.5-8.5, mixing with ionized water and binary hydrazide, dispersing and filtering. The acrylate polymer is obtained by carrying out solution polymerization on a mixed solution of a part of initiator, a hard monomer, a soft monomer, a first type of hydrophilic monomer, a second type of hydrophilic monomer, epoxy resin and a combined cross-linking monomer and a residual initiator dissolved in an organic solvent at 80-83 DEG C, wherein the mixed solution is prepared from the initiator, the hard monomer, the soft monomer, the first type of hydrophilic monomer, the second type of hydrophilic monomer, epoxy resin and the combined cross-linking monomer. The main solvent of the dispersion is water, the viscosity is low, and the content of the organic solvent is 1t; the water-based ink has the advantages of low content of VOCs (volatile organic compounds), multiple cross-linked network structure, high cross-linking degree (78-83%), excellent resolubility after being prepared into ink, good adhesive force on a plastic film, good water resistance, good storage stability and high glossiness.

The invention relates to the technical field of oilfield chemistry, and discloses a thickening agent composition, a thickening agent as well as a preparation method and application of the thickening agent. The thickening agent composition contains a polymer A having a hydrazide structure and a polymer B having a carbonyl structure, wherein the polymer A has a structural unit derived from a first nonionic monomer, a structural unit derived from a first anionic monomer, and a structural unit derived from a hydrazide group-containing monomer; and a polymer B having a structural unit derived from a second nonionic monomer, a structural unit derived from a second anionic monomer, and a structural unit derived from a carbonyl group-containing monomer. According to the thickening agent disclosed by the invention, the thickening agent has excellent temperature resistance and salt resistance, and the shearing force of the solid-free water-based drilling fluid can be remarkably improved.

The invention relates to the technical field of coatings, and particularly discloses a waterproof coating and a preparation method thereof. The preparation method of the waterproof coating comprises the following steps: preparing modified flaky hydrotalcite; preparing a hydrazide modified polyurethane emulsion; adding the modified flaky hydrotalcite into the hydrazide modified polyurethane emulsion, stirring, adding a dispersing agent and a defoaming agent, and stirring to obtain the waterproof coating. The waterproof coating has excellent waterproof performance, is low in preparation cost and is suitable for large-scale popularization and application.

The invention discloses preparation and application of a self-repairing conductive hydrogel material based on a dynamic acylhydrazone bond and a hydrogen bond, and belongs to the field of flexible electronic materials.The preparation method comprises the steps that acrylamide serves as a monomer, a carbon-based material serves as a conductive filler, a hydrophobic monomer is combined, and a polymer network framework is prepared through a free radical polymerization method; the preparation method comprises the following steps: preparing natural polysaccharide, modifying and grafting the natural polysaccharide by adopting an oxidizing agent and a hydrazide modifier to obtain aldehyde polysaccharide and hydrazide polysaccharide, and introducing the aldehyde polysaccharide and the hydrazide polysaccharide into a polymer network skeleton to prepare the self-repairing conductive hydrogel based on a dynamic acylhydrazone bond and hydrogen bond network structure. The prepared self-repairing conductive hydrogel not only has the mechanical properties of high ionic conductivity and high fracture tensile strength, but also has the characteristics of good repairability, high sensitivity, stable electrical property and the like; the method is easy to operate, simple in step and suitable for a plurality of related fields such as wearable electronic equipment, flexible strain sensors and electronic skin.

[Problem] To provide an additional use of a polysaccharide derivative such as a tissue adhesive material[Solution] According to some embodiments, a tissue adhesive material is provided, which is intended to be used for a hard and thick tissue and / or a connective tissue and comprises a polysaccharide derivative having such a structure that a group represented by formula (A) is introduced in an acidic, basic or amphoteric polysaccharide. According to some embodiments, a crosslinked structure and a tissue adhesive material comprising the crosslinked structure are provided, in which the crosslinked structure comprises (a) a polysaccharide derivative having such a structure that a group represented by formula (A) is introduced into an acidic, basic or amphoteric polysaccharide and (b) at least one of an amino-group-containing polymer and an amino-group-containing low-molecular-weight compound each containing at least two primary amino groups, hydrazide groups or aminooxy groups and a group represented by formula (x1), and the crosslinking is achieved by the covalent bonding between a primary amino group, a hydrazide group or an aminooxy group contained in the amino-group-containing polymer and the amino-group-containing low-molecular-weight compound and the group represented by formula (A) contained in the polysaccharide derivative through a Schiff base. According to some embodiments, a tissue adhesive material having a gel-like form is provided, which comprises a polysaccharide derivative having such a structure that a group represented by formula (A-2) is introduced into a polysaccharide containing an amino group, in which the group represented by formula (A-2) is introduced into the polysaccharide by substituting for a hydrogen atom in the amino group in the polysaccharide to form an amide bond.

The invention belongs to the technical field of rubber, and particularly relates to a rubber composition, a preparation method thereof and a TBR tire using the rubber composition. The rubber composition is prepared from the following components in parts by mass: 100 parts of diene rubber, 0.2 to 1.5 parts of hydrazide compound, 0.2 to 1.5 parts of tetrazine compound multifunctional modifier, 0 to 30 parts of liquid rubber, 20 to 120 parts of reinforcing filler, 1 to 10 parts of silane coupling agent, vulcanization accelerator, vulcanizing agent, antioxidant, vulcanization activator, resin and plasticizer. The rolling resistance and heat generation of the TBR all-steel tire can be obviously reduced, and meanwhile, the cutting resistance and tear resistance of the tire are improved.

The invention relates to a hydrated borate micromolecule with a boron-nitrogen coordination bond, a polyurethane elastomer material and a preparation method thereof, and the preparation method comprises the following steps: S1, dissolving and reacting 1, 4-benzene diboronic acid and a polyfunctional group amine compound at room temperature through a solution reaction to form a rigid eight-membered ring intramolecular boron-nitrogen coordination micromolecule NCBW-X; s2, polyester (polycaprolactone, polybutylene terephthalate, polylactic acid and the like) or polyether (polytetrahydrofuran, polypropylene ether polyol and the like) and diisocyanate (isophorone diisocyanate, toluene diisocynate and the like) react in a dry solvent at 80 DEG C by using a catalyst to form a prepolymer; hydrazide and NCBW-X are added into the obtained prepolymer for chain extension; the water resistance and the acid and alkali resistance of the material are enhanced through the boron-nitrogen coordination structure characteristic; and the prepared polyurethane elastomer material has very strong self-repairing efficiency and environmental adaptability.

The present invention relates to a method for transporting chlorinated water comprising the step of conveying the water through a pipe made of a polyolefin comprising a hydrotalcite mineral and a hydrazide of the formula (I) as defined herein. The present invention also relates to a pipe for transporting the chlorinated water where the pipe is made of the polyolefin comprising the hydrotalcite mineral and the hydrazide of the formula (I); to a method for preparing the pipe comprising contacting the polyolefin, the hydrotalcite mineral and the hydrazide of the formula (I); and to a use of the hydrotalcite mineral and the hydrazide of the formula (I) for stabilizing a pipe made of a polyolefin against chlorinated water.

The invention discloses an anti-self-adhesion heat-sealing cover tape and a preparation method thereof, and belongs to the technical field of preparation of cover tapes for electronic components. The preparation method comprises the following steps: coating the surface of a pretreated polyethylene film with a composite adhesive coating solution, heating to 60-70 DEG C in an inert gas environment, reacting for 5-6 hours, and drying and curing to obtain the self-adhesion-preventing heat-sealing cover tape. The preparation method comprises the following steps: constructing microcapsule powder which is wrapped with a hydrazide compound and can be broken at high temperature, mixing the microcapsule powder, an acrylate monomer, a keto compound and an azo initiator to form a composite bonding coating liquid, smearing the surface of a pretreated polyethylene film with the composite bonding coating liquid, and then polymerizing and curing to form the self-adhesion-preventing heat-sealing cover tape.

The invention discloses a water-based binder and a preparation method thereof, and belongs to the technical field of battery binders. Mixing the carboxymethyl cellulose, the hydrazide levodopa modified polysiloxane and the water-based polyacrylate, heating to 50-60 DEG C, reacting for 3-4 hours, adjusting the pH value to 6-7 after the reaction is finished, adding the defoaming agent, and continuously stirring to obtain the water-based adhesive. According to the preparation method provided by the invention, the carboxymethyl cellulose, the hydrazide levodopa modified polysiloxane and the water-based polyacrylate are used as raw materials to synthesize the water-based binder with a three-dimensional network structure, and the water-based binder can be firmly adhered to the current collector to ensure effective electron conduction; the water-based adhesive provided by the invention has excellent peel strength and adhesive property, and can be used for preparing the lithium ion battery foil.

The invention provides a one-component epoxy structural adhesive and a preparation method and application thereof. The one-component epoxy structural adhesive comprises specific portions of bisphenol A epoxy resin, polyurethane modified epoxy resin, core-shell rubber toughening agent, reactive diluent, dicyandiamide, hydrazide complex, imidazole adduct and urea-based accelerator. The two epoxy resins are selected for matching, and two curing agents, dicyandiamide and hydrazide complex, are used for coordination, and imidazole adduct and urea-based accelerator are used for assistance, so that the one-component epoxy structural adhesive not only has a lower curing temperature, but also has excellent storage stability, can be stably stored at room temperature for up to 6 months, and the cured product obtained after curing has high strength and high toughness.