94 results about "Adhesion strength" patented technology

The present application belongs to the technical field of polymer adhesive material, and particularly relates to a resin composition for bonding polyolefin material and a preparation method thereof. The present application is prepared by formula screening optimization, and the ratio of the storage modulus E'30 at 30 DEG C to the storage modulus E'130 at 130 DEG C is greater than 100. The polyurethane resin is used in combination with butadiene-styrene copolymer with butadiene content greater than 60% and butadiene-styrene-vinylpyridine copolymer, so that the adhesive with good fusion and good adhesion to polyethylene base material is obtained. The allyl silicon modified pyridine monomer, allyl silicon modified carbazole monomer and lauryl acrylate are polymerized, and the prepared acrylate polymer is used in combination with the polyurethane resin. The pyridine group, tertiary butyl group, carbazole group and silicon atom in the acrylate polymer and the dodecyl group in the lauryl acrylate are used to improve the adhesion strength to the polyolefin base material.

This application provides a rubber composition for stator lining and a motor assembly, relating to the field of rubber material technology. The rubber composition for stator lining, by weight, comprises: 100 parts of nitrile rubber, 10-14 parts of plasticizer, 60-70 parts of reinforcing component, 1-5 parts of silane coupling agent, and 10-15 parts of vulcanizing component; wherein, based on the weight of the nitrile rubber, the acrylonitrile content in the nitrile rubber is 30%-40%. The technical solution of this application can effectively solve the problems of insufficient adhesion strength and poor interfacial bonding stability between the stator lining layer and the metal housing in the prior art, which leads to cracking and delamination of the stator during use.

This invention belongs to the field of biomedical materials technology, specifically disclosing a composite material for promoting the repair of soft tissue defects in the maxillofacial region and its preparation method. The composite material comprises the following raw materials: oxidized hyaluronic acid, carboxymethyl chitosan, dopamine-functionalized hydroxyapatite nanoparticles, strontium salt, copper salt, glycerol, and deionized water. The preparation method includes: firstly, strontium salt and copper salt are hierarchically loaded onto the surface of dopamine-functionalized hydroxyapatite nanoparticles via a dual mechanism of "lattice substitution-surface coordination," and then, together with oxidized hyaluronic acid and carboxymethyl chitosan, construct a "dynamic covalent-hydrogen bond-coordination bond" triple synergistic network through Schiff base reaction, hydrogen bonding, and coordination bonds. This invention solves the technical problems of poor wet surface adhesion, low mechanical strength, single function, and easy burst release of ions in existing repair materials, exhibiting excellent effects such as sequential antibacterial and repair-promoting properties, high adhesion strength, and long-lasting sustained release.

This invention belongs to the field of waterborne coatings and discloses a filler-modified organosilicon waterborne polyurethane, its wear-resistant superhydrophobic coating, and its preparation method. The wear-resistant superhydrophobic coating is made by stirring waterborne polyurethane emulsion as the main raw material, adding hydrophobic modified organosilicon, nanofiller modifiers, and additives. This coating not only has excellent adhesion and wear resistance but also superhydrophobic properties. Specifically, the introduction of hydrophobic modified organosilicon improves the coating's adhesion strength to the substrate and its wear resistance; the introduced low surface energy -Si-O-Si segments improve the coating's hydrophobicity, giving it superhydrophobic properties; and different fillers impart good UV resistance and wear resistance to the coating.

The application provides a cleaning method based on dirt feature analysis, comprising the following steps: detecting the thickness of the dirt layer on the surface of the workpiece to be cleaned, and performing ultrasonic cleaning on the workpiece to be cleaned; collecting images of the surface of the workpiece after ultrasonic cleaning, and judging whether there are residual dirt particles on the surface; setting the parameters of vibration cleaning according to the maximum size of the residual dirt particles, and performing vibration cleaning; after the vibration cleaning, analyzing whether there are residual attachments on the surface of the workpiece; determining the adhesion strength grade of the residual attachments, and flushing the residual attachment area. The cleaning method provided by the application performs multi-stage analysis on the dirt state of the surface of the workpiece to be cleaned, designs a targeted cleaning process and parameters based on the analysis data, effectively improves the cleaning efficiency, reduces the energy consumption, and avoids the damage of the workpiece caused by redundant processes.

This application relates to the field of polyurethane adhesive technology, and discloses an ultra-low temperature high-adhesion-strength single-component polyurethane composition and its preparation method. By mass percentage, it comprises the following components: 50%-60% first isocyanate, 10%-20% prepolymer, 10%-20% inorganic filler, 0.5%-1% catalyst, 1%-2% defoamer, 5%-10% solvent oil, and 0.11%-0.2% pigment. The first isocyanate is a mixture of toluene diisocyanate and isophorone diisocyanate, with a mass ratio of toluene diisocyanate to isophorone diisocyanate of 1:0.5-1.5. The ultra-low temperature high-adhesion-strength single-component polyurethane composition of this application exhibits excellent adhesion strength at room temperature and low temperatures, and superior adhesion performance at ultra-low temperature environments (-150℃), meeting industry standards.

The application discloses a kind of high adhesion hydrogel for electroencephalogram test and its preparation method and application, belong to biomedical engineering technical field.The hydrogel includes the following components crosslinked product: anionic monomer, cationic monomer, monomer and mutual penetration agent;The anionic monomer is any one of malic acid, gluconic acid, citric acid and lactic acid, cationic monomer is betaine or acetyl L-carnitine, monomer is N, N-dimethyl acrylamide, acrylic acid, sodium acrylate, 4-acryloyl morpholine or sodium acrylamidomethyl propane sulfonate, mutual penetration agent is sodium chloride aqueous solution or sodium chloride water-retaining agent solution.Preparation, cationic monomer is mixed and dissolved, vacuum drying, adding photo initiator mixing, then mutual penetration agent is added, and it is obtained by ultraviolet light crosslinking.The hydrogel of the application has high adhesion (adhesion strength reaches 203.22 kPa), high ion mobility and excellent biocompatibility, and the signal gain in EEG and ECG test reaches 2-3 times of traditional conductive paste, which can be widely used in medical conductive paste field.

The application discloses a cavity-column combined shape memory polymer stamp and a microchip proximity transfer method thereof. The stamp takes shape memory epoxy resin as a matrix, and a cavity-column combined structure is directly formed through laser microprocessing. The stamp realizes an adhesion switching ratio of up to 1200 by utilizing the change of the elastic modulus of the cavity-column combined shape memory polymer stamp before and after the glass transition temperature, and realizes the low-cost microchip high-precision proximity transfer of high-adhesion pickup and low-adhesion release by combining negative pressure auxiliary adsorption and micro-column directional pushing. The stamp has simple preparation process, does not need complex photoetching process, and can be flexibly regulated and controlled according to the performance requirements of the stamp. The stamp can be adapted to silicon, polyimide, copper, glass, acrylic and other material chips with roughness of 1nm-500nm. The maximum strain of the stamp is only 0.27 during the transfer process, the interface temperature is controllable, the residual adhesion strength is small, and the problems of the existing transfer technology, such as complex preparation, narrow application range and low transfer reliability, are solved.

The application discloses an ice adhesion strength measuring device and a measuring method, and belongs to the technical field of ice adhesion strength measurement. The measuring device comprises an inner circular arc guide rail, an outer circular arc guide rail, an icing mold, an action line, a tension sensor, a first movable part, a second movable part and a turning part. The outer circular arc guide rail is coaxially sleeved outside the inner circular arc guide rail, the icing mold is fixedly connected with the inner circular arc guide rail, the icing mold is provided with an icing chamber, the icing chamber can be in contact with the surface of a sample to be measured, the first movable part is movably installed on the inner circular arc guide rail, the second movable part is movably installed on the outer circular arc guide rail, the turning part is fixedly arranged, one end of the action line is fixed to the first movable part, the other end is arranged around the second movable part and the turning part and is connected with the tension sensor, and the first movable part can move along the inner circular arc guide rail under the driving of the action line. The position of the action line is adjusted, the ice adhesion strength at any angle is measured, and the measurable angle range of the ice adhesion strength is expanded.

This invention discloses a method for improving the adhesion of fluororubber surfaces, aiming to solve the defects of existing fluororubber surface modification technologies, such as low adhesion strength, poor stability, narrow applicability, and environmentally unfriendly processes. The method is achieved through the following steps: 1. Pre-treatment of the fluororubber surface, removing oil and impurities and drying; 2. Preparation of a composite silane treatment agent, dispersing four silane coupling agents containing olefins, cyano groups, amino groups, and peroxy groups in an alcoholic solvent according to a specific mixing order, sealing and storing for later use; 3. Construction of a composite molecular layer, coating the treatment agent onto the fluororubber surface and pre-curing; 4. Bonding and vulcanization curing, allowing the fluororubber coated with the composite molecular layer to be bonded to the substrate and simultaneously vulcanized. This invention overcomes the bottleneck of low reactivity of fluororubber surfaces by synergistically constructing a three-in-one composite molecular layer of "reactive layer - polar bonding layer - flexible entanglement layer" using multiple silanes, achieving stable adhesion between fluororubber with different vulcanization systems and various metal / resin substrates. Its initial peel strength is ≥850N / m, and its strength retention rate after immersion in aviation hydraulic oil at 200℃ is ≥91.9%. The process is simple and environmentally friendly, and it is suitable for harsh working conditions such as aerospace and automotive power systems, and has important industrial application value.

This application relates to the field of adhesives, and more specifically, to a UV hydrolyzable adhesive and its preparation method. It comprises the following raw materials by weight percentage: 40-58% modified polyurethane acrylate, 10-20% tackifier and absorbent polymer, 1-3% photoinitiator, and the balance being an active diluent; the tackifier and absorbent polymer is composed of a polyurethane associative thickener, methanol-etherified melamine-formaldehyde resin, absorbent fibers, and hydroxyl acrylate. By specifically selecting the polyurethane associative thickener, methanol-etherified melamine-formaldehyde resin, absorbent fibers, and hydroxyl acrylate as the main components of the tackifier and absorbent polymer, and optimizing their ratio, the adhesion strength and hydrolysis detachment effect of the UV hydrolyzable adhesive on the surfaces of lightweight composite materials such as carbon fiber composites and glass fiber reinforced plastics are significantly improved.

This invention discloses an anti-stripping and anti-aging agent, its preparation method, and its application. The anti-stripping and anti-aging agent of this invention comprises the following raw materials: styrene-butadiene-styrene copolymer, styrene-butadiene rubber, polyethylene oxide, styrene-modified phenol, p-phenylenediamine compounds, coupling agents, and antioxidants. The preparation method of the anti-stripping and anti-aging agent includes: mixing the above materials evenly, followed by kneading and extrusion to obtain the anti-stripping and anti-aging agent. The anti-stripping and anti-aging agent of this invention is in granular form and, when used in airport runway asphalt, can significantly improve the adhesion strength of airport runway asphalt, improve its anti-stripping performance, enhance its heat aging resistance, and exhibit strong adaptability to the high-temperature wake environment of aircraft.

The multilayer structure includes: an optical film having an optical film layer containing quantum dots; and a multilayer barrier film article. The multilayer article has a first layer having a first main surface and a second main surface. The second main surface contacts a second layer of the multilayer article, and the first main surface contacts the optical film layer of the optical film. The first layer includes a cured (meth)acrylate base layer prepared from at least one (meth)acrylate and at least one adhesion promoter. The adhesion promoter is a urethane or a urea(poly)-(meth)acrylate(poly)silane. The adhesion strength of the first layer to the optical film layer is higher than that of the same first layer without an adhesion promoter to the optical film layer. The multilayer structure may contain additional layers and may be included in an optical device.

The application discloses an adhesion-treatment synergic integrated tissue adhesive and a preparation method and application thereof, and belongs to the technical field of medical adhesives. The adhesion-treatment synergic integrated tissue adhesive comprises: (1) 100 parts by mass of an adhesion precursor, wherein the adhesion precursor is a mixture of a silk fibroin-polyphenol composite hydrogel and urea; and (2) 0.1-100 parts by mass of a medically acceptable metal oxide particle, wherein the metal oxide particle has a hollow mesoporous shell structure and is loaded with a tissue repair promoting component. The adhesion-treatment synergic integrated tissue adhesive not only has excellent adhesion strength, mechanical bearing capacity and a suitable curing window time, can be adapted to the repair of complex tissue damage sites, but also has biological activity and good compatibility for promoting tissue healing, so that the adhesion fixation, the repair and regeneration of the tissue are effectively realized.

This invention provides an adhesive, a ceramic separator, and a battery. It comprises a first polymer and a second polymer, chemically bonded together. The first polymer has a glass transition temperature greater than or equal to 80°C, and the second polymer has a glass transition temperature less than or equal to 0°C. The mass ratio of the first polymer to the second polymer is (50~80):(20~50). The first polymer includes a first polymerization unit and a first crosslinking structural unit, the first polymerization unit comprising one or more of carboxylic acid-containing structural units, acrylamide-containing structural units, and acrylonitrile-containing structural units. The second polymer includes a second polymerization unit and a second crosslinking structural unit, the second polymerization unit comprising hydroxyacrylate-containing structural units and / or polyether-containing structural units. This adhesive combines excellent high-temperature stability with flexibility, significantly improving the edge curling problem of ultra-thin ceramic separators, while simultaneously enhancing the heat resistance and adhesion strength of the coating, thus meeting the industry's demand for thinner and lighter designs.

A foam forming composition comprising a part A and a part B, a catalyst for reacting part A and part B with one another and a propellant, the part A consisting of one or more multifunctional acrylate compounds as a Michael acceptor, wherein the part A consists of (i) part Aa being one or more epoxy acrylates having multiple functional acrylate groups, and (ii) part Ab being one or more acrylates different from part Aa and having multiple functional acrylate groups, wherein the part B consists of one or more multifunctional Michael donor compounds, and wherein the weight ratio EAWR of the part Aa to part Ab is ≥1.65. The cured foam made by curing the expanded foam forming composition shows good lap shear strength in combination with increased compression strength and tensile adhesion strength.

This invention provides a cold-stamped composite aluminum film, comprising an AL film, a uniformly distributed adhesive, a PA film, a PVC film, tear-resistant patterns, and mechanical locking patterns. The AL film, PA film, and PVC film are bonded together by the uniformly distributed adhesive. Both the PA film and PVC film have integrally formed tear-resistant patterns and mechanical locking patterns, with the AL film having integrally formed mechanical locking patterns. This invention increases the contact area and mechanical locking mechanism by incorporating mechanical locking patterns into the AL film, PA film, and PVC film, thereby enhancing interlayer bonding strength and improving packaging sealing. The mesh-like tear-resistant patterns on the outer surfaces of the PA film and PVC film disperse stress to prevent crack propagation and also improve adhesion strength to objects, making it suitable for pharmaceuticals, new energy, and other fields.

This invention relates to a thermoplastic elastomer composite material, its preparation method, and its applications. The thermoplastic elastomer composite material comprises the following components in parts by weight: 10-30 parts of hydrogenated styrene elastomer, 20-60 parts of softening oil, 5-15 parts of polypropylene, 4-16 parts of thermoplastic polyester elastomer, 3-11 parts of ethylene-vinyl acetate copolymer, 5-15 parts of maleic anhydride-grafted polypropylene, and maleic anhydride-grafted olefin copolymer elastomer. The thermoplastic elastomer composite material of this invention not only possesses good tensile strength and good adhesion strength to nylon at room temperature, but also good adhesion strength to nylon at low temperatures, making it highly suitable as a coating material for nylon in cold-weather applications.

The instant invention relates to a method for treating a surface of a metal, a metal alloy or a metal oxide by contacting the at least one section of said metal, metal alloy or metal oxide with an alkaline aqueous precoat solution comprising one or more than one tetrazole and / or triazole in combination with an acidic cleaning step which is performed either prior to or following the precoat step. It has surprisingly been found that when such pretreated surfaces are subsequently contacted with triazine compounds that the surfaces exhibit an improved resistance to delamination under thermal, humidity, and chemical stress conditions. This is demonstrated by increased adhesion strength and wedge void reduction.

The instant invention relates to a method for treating a surface of a metal, a metal alloy or a metal oxide by contacting the at least one section of said metal, metal alloy or metal oxide with an acidic aqueous precoat solution comprising one or more than one tetrazole and / or triazole in combination with an acidic cleaning step which is performed either prior to or following the precoat step. It has surprisingly been found that when such pretreated surfaces are subsequently contacted with triazine compounds that the surfaces exhibit an improved resistance to delamination under thermal, humidity, and chemical stress condi- tions. This is demonstrated by increased adhesion strength and wedge void reduction.

This invention provides a method for improving the adhesion between a TGV product and a circuit layer, comprising the steps of surface treating the TGV product with a surface treatment solution, wherein the surface treatment solution contains a solute and water by weight, the solute comprising 5-30 parts of acid, 8-35 parts of fluoride, 5-25 parts of fluorosilicate, 3-25 parts of fluorine-free soluble metal salt, and 0.3-2.0 parts of surfactant, the chemical formula of the fluoride being M1F or M2F2, where M1 is selected from K, Na, or NH4, and M2 is selected from NH4H, Mg, Ba, or Ca; and a circuit layer is formed on the surface of the TGV product after step (1). This method can improve the adhesion strength between the TGV product and the circuit layer, thereby providing a high-performance chip packaging structure.

This invention discloses a high-adhesion, non-expansive fire-retardant coating for steel structures and its preparation method, belonging to the field of fire-retardant coating technology and patent classification number C09D5 / 18. The method includes: modifying sepiolite in three steps (acid activation, silane coupling agent, and tannic acid) and then compounding it with polymer powder to obtain an adhesion-enhancing composite; sequentially depositing a magnesium-aluminum layered double hydroxide and a sodium silicate coating on the surface of vitrified microspheres to obtain composite modified vitrified microspheres; and mixing cement, gypsum, calcium carbonate, cellulose ether, fiber, the above two modified components, silica fume, and zinc borate to obtain the coating. This invention integrates the chemical anchoring layer on the fiber surface with the multiple fire-retardant functions of the microspheres, and utilizes the synergistic effect of silica fume and zinc borate to resolve the high-temperature compatibility contradiction between organic and inorganic components, significantly improving the coating's adhesion strength and fire resistance limit, achieving a balance between high adhesion and high fire resistance.

This disclosure relates to a hot-melt polyimide adhesive layer, a hot-melt polyimide tape, and a method for preparing the same. The glass transition temperature of the hot-melt polyimide adhesive layer is 150-200°C. By controlling the proportions of BAPP in the diamine and TMEG in the dianhydride, and using a small amount of siloxane diamine (especially PSX), the hot-melt polyimide adhesive layer of this application can achieve the target adhesion strength (high adhesion) with the leadframe, while ensuring a glass transition temperature of 150-200°C and good release properties (ensuring no residue remains on the leadframe when removing the tape after semiconductor packaging). This effectively prevents the back of the leadframe from being penetrated by the encapsulation resin during the packaging process.

This invention relates to the field of functional coating materials technology, and more particularly to a method for in-situ polymerization to fill the pores of a conductive coating. The method involves pretreating the conductive coating to remove surface impurities and improve the activity of the pore walls; preparing a polymerization precursor liquid comprising reactive monomers, a thermal initiator, a flexible toughening component, and a dispersion medium; subjecting the conductive coating to degassing under negative pressure to expel gas from the pores; then introducing the polymerization precursor liquid to penetrate the pores, cracks, and interparticle spaces of the conductive coating; prepolymerizing the penetrated conductive coating to gradually increase the viscosity of the polymerization precursor liquid and fix it within the pores; and finally, using a staged heating method for thermally initiated polymerization and curing to form a polymer-filling layer within the pores of the conductive coating. This invention improves the conductive stability, adhesion strength, bending resistance, thermal cycling resistance, and long-term service reliability of the conductive coating.

This invention discloses a composite coating material, construction process, and application for coal mine transportation pipelines. The composite coating material, by mass fraction, comprises the following components: 30%-35% epoxy resin, 10%-15% polytetrafluoroethylene, 5%-8% nano-aluminum nitride, 8%-12% curing agent, 2%-4% coating additives, and the balance being solvent. This composite coating exhibits an adhesion strength ≥5 MPa, ensures no freezing or blockage of the pipeline under -30℃ low-temperature conditions, reduces scaling rate by more than 90% compared to ordinary pipelines, and extends pipeline service life by more than 3 times. It is suitable for on-site maintenance and construction of coal mine water-coal slurry transportation pipelines and mine water return pipelines in severely cold regions such as Northeast and Northwest China, possessing extremely high practical value and promising application prospects.

This invention relates to current collectors and electrodes and secondary batteries including the same, said current collector comprising an underlayer containing a conductive material, a binder, and a thickener (wherein the conductive material has a BET specific surface area of ​​170 m²). 2 ( / g or larger multi-walled carbon nanotubes), thus exhibiting excellent adhesion strength to the electrode active material layer, low interfacial resistance and excellent scratch resistance.

The application provides a kind of lithium ion battery separator adhesion strength detection method, related equipment, method includes: providing the test sample after heat pressing pretreatment, test sample includes mutually bonded pole piece layer and separator layer;With vacuum suction fixed platform adsorption pole piece layer, to fix pole piece layer;With vacuum suction stretching component, adsorption separator layer the first edge region and the second edge region of the surface deviating from pole piece layer;Drive vacuum suction stretching component relative to vacuum suction fixed platform to move away, or drive the first vacuum suction module in vacuum suction stretching component relative motion towards second vacuum suction module, to simultaneously exert tensile force on the first edge region and the second edge region;Based on the tensile force data of vacuum suction stretching component and the displacement data of separator layer, determine the adhesion strength data of separator layer.The application can improve the stability of adhesion strength detection, so that the adhesion strength data obtained is more accurate.

The present application provides a kind of reactive hydrophobic silica nanoparticles and its application in coating composition, coating. By introducing reactive hydrophobic silane modified compound coated silica nanoparticles into epoxy resin, the coating has excellent hydrophobic ability and very low ice adhesion strength. The reactive group on the surface of silica nanoparticles is beneficial to improve the binding force of epoxy resin and nanoparticles in the coating, so that the superhydrophobic coating has a super-high hydrophobic angle, and water droplets are difficult to stay on the surface for a long time and freeze into ice. Even if some water droplets form ice at very low temperature, the ice adhesion strength of the ice is only 2.42 kPa, and it is very easy to fall off under the action of a small shear force. The superhydrophobic coating is suitable for application in the anti-icing of equipment and facility component surface, by improving the water contact angle of water droplets on the surface of the object to reduce the contact area with the surface and improve the ice self-detaching property after icing, thereby solving the problem of equipment and facility operation failure or efficiency reduction caused by icing.

This invention relates to the field of coating technology and discloses a high-bonding-energy rare-earth nano-coating, its preparation method, and its application. The coating of this invention comprises 35-52 parts by weight of silica, 12-23 parts by weight of hydroxide, 0.3-0.8 parts by weight of lanthanum complex, and 26-34 parts by weight of filler, etc. The lanthanum complex tightly bonds the metal substrate to the silicate coating, improving the bonding energy and adhesion strength between the coating and the metal substrate, making the coating less prone to peeling. The lanthanum complex contains phthalonitrile groups. During high-temperature heat treatment, phthalonitrile undergoes self-crosslinking and cyclization to generate phthalocyanine and other aromatic heterocyclic structures with high-temperature resistance, which is beneficial to improving the heat resistance of the coating. Simultaneously, the formed chemical crosslinking system enhances the crosslinking degree within the silicate coating, inhibiting the entry of corrosive media such as acids and alkalis into the coating matrix, and improving the coating's resistance to acid and alkali corrosion.

An image transfer sheet (1) is obtained by laminating a first release layer (11), a transfer layer (20) including an image layer (22), an adhesive layer (30), and a second release layer (12) in this order. The adhesive layer (30) includes an adhesive layer body part (31) and an adhesive force reduction part (32) provided on the surface of the adhesive layer body part (31). The adhesive layer body part (31) is in contact with the second release layer (12), and the adhesive force reduction part (32) is in contact with the transfer layer (20). When the adhesive force between the first release layer (11) and the transfer layer (20) is denoted by A, the adhesive force between the second release layer (12) and the adhesive layer body part (31) is denoted by C, the adhesive force between the adhesive force reduction part (32) and the transfer layer (20) is denoted by D, and the tensile strength of the adhesive layer (30) is denoted by F1, all of the following relational expressions (1) to (3) are satisfied.　(1): Adhesive force C < adhesive force D (2): Adhesive force C < adhesive force A (3): Tensile strength F1 < adhesive force C