130 results about "Polyurethane adhesive" patented technology

The application belongs to the technical field of polymer material adhesive, and particularly discloses a polyurethane adhesive and a preparation method thereof. The polyurethane adhesive is in the form of emulsion, the emulsion particles in the polyurethane adhesive have polyurethane long chains capped by dopamine and containing epoxy group side chains, and the polyurethane long chains have a core-shell structure with hydrophilic groups facing outward and hydrophobic groups facing inward. The above structure enables the polyurethane adhesive to fully exert the biomimetic mussel adhesion effect of dopamine and achieve strong bonding at various interfaces. The emulsion particles can not only effectively improve the stability of the emulsion, but also enable the adhesion groups of dopamine to be enriched on the surface of the emulsion particles, thereby significantly improving the adhesion effect. When the polyurethane adhesive is applied for curing, the end groups of dopamine can be coordinated and crosslinked with mild metal ions, thereby exerting bonding strength, and the dopamine capping can completely eliminate the -NCO groups in the traditional polyurethane adhesive, thereby overcoming the disadvantage of insufficient strength.

This invention provides a water-resistant, non-isocyanate-based polyurethane adhesive, its preparation method, and its applications. The adhesive features a cross-linked network structure obtained by reacting a trifunctional five-membered cyclic carbonate with tris(2-aminoethyl)amine; the trifunctional five-membered cyclic carbonate has the structure shown in Formula I. This non-isocyanate-based polyurethane adhesive is suitable for a wider range of environmental conditions and applications. It can be used not only in dry environments but also maintains good adhesion performance in humid, high-humidity, and even underwater environments, unaffected by moisture. Even after being submerged underwater for a period of time, its adhesive strength after removal and air drying is still similar to that of the unsubmerged sample, thus meeting the bonding requirements in humid environments, such as bonding items in bathrooms, kitchens, and outdoor construction. This expands the application field of polyurethane adhesives, providing a more reliable solution for various industrial and civilian bonding needs.

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 utility model relates to the technical field of artificial board discloses a kind of high-strength wear-resistant composite artificial board, including two combination boards, the outer wall bottom of combination board is fixedly connected with reinforcing glue, the outer wall top of reinforcing glue is fixedly connected with reinforcing mechanism, the outer wall of reinforcing glue is provided with wear-resistant mechanism, the reinforcing mechanism includes bamboo fibre layer, the outer wall bottom of bamboo fibre layer is fixedly connected in the outer wall top of reinforcing glue, the outer wall top of bamboo fibre layer is fixedly connected with shaving layer, the outer wall top of shaving layer is fixedly connected with resin layer, the outer wall top of resin layer is fixedly connected with polyurethane glue layer, the outer wall top of polyurethane glue layer is provided with fibre assembly.In the utility model, bottom layer bamboo fibre layer and oriented shaving board provide basic support, enhance the strength of core layer using high-performance fibre and composite material, each layer synergistic effect, through performance complementation and structure optimization, realize the high-strength demand of artificial board.

A two-component polyurethane adhesive for bonding modules in automotive and internet-of-things (IoT) applications is provided. The adhesive comprises a polyisocyanate monomer and an isocyanate-terminated polyurethane prepolymer, along with polyols, diols, polyamines, and a polybutadiene chain compound. It features a high bonding strength of over 3MPa with low modulus in service temperature from -40℃ to 105℃ and is suitable for dissimilar material assembly.

The application discloses a polyurethane adhesive containing phosphorus-silicon synergistic flame-retardant structure, which is prepared from the following raw materials in parts by weight: polyol 50-80 parts, isocyanate 20-40 parts, end-hydroxyl phosphorus-silicon synergistic flame-retardant structure monomer 5-20 parts, chain extender 2-8 parts, and catalyst 0.1-1 part; the end-hydroxyl phosphorus-silicon synergistic flame-retardant structure monomer is a dihydric alcohol compound containing phosphorus and silicon, which is prepared from 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and vinyl silane as main raw materials, and the general formula of the molecular structure is HO-R-Si(OR')3; wherein R is an organic chain segment containing a DOPO structural unit, and R' is methyl or ethyl. The application synthesizes a phosphorus-containing dihydric alcohol with a clear structure and a hydrolysable silane group, and prepares a main-chain phosphorus-silicon-containing intrinsic flame-retardant polyurethane through a copolymerization mode by taking the dihydric alcohol as a reactive monomer.

This disclosure provides a method. In one embodiment, the method includes the step of preparing pellets of recycled spent material. The recycled spent material is formed from a multilayer structure comprising at least (i) a layer composed of an olefin polymer and (ii) an adhesive layer. The adhesive layer comprises a solvent-free polyurethane adhesive composition. The method includes the step of blending the pellets with an olefin polymer blend component to form a blended material. The method includes the step of forming an article from the blended material. This disclosure also provides an article produced by the method.

This invention discloses a method for improving the crack resistance of ultra-high performance concrete structures, relating to the field of concrete materials. The invention involves bonding polylactic acid (PLA) fibers and metal fibers with polyurethane adhesive to form a composite fiber. After treatment with polyurethane adhesive, the composite fiber forms a three-dimensional support network, which is alternately laid with a fine slag layer to form a gradient structure, effectively inhibiting the initiation and propagation of microcracks. The cementitious system, combined with composite admixtures, reduces the heat of hydration, and the micropores of the fine slag buffer shrinkage stress, significantly reducing shrinkage cracking. The self-healing microcapsules loaded with fine slag are uniformly dispersed, releasing a repair agent when cracks occur, rapidly healing microcracks, significantly restoring mechanical properties and impermeability, and improving durability. Furthermore, under the alkali-activated effect during the PLA fiber curing process, the fine slag can bond tightly with the composite fiber, achieving a synergistic "crack prevention-repair" effect, adapting to the construction of complex components, reducing material costs, shortening the curing cycle, and significantly reducing the total life-cycle cost.

The present application relates to a kind of two-component cold-mixing road polyurethane binder construction window period prediction method, comprising the following steps: two-component cold-mixing road polyurethane binder is carried out DSC non-isothermal test, and the curing exothermic peak temperature under each heating rate is recorded, and the curing reaction activation energy is obtained;Select first calibration temperature T1, determine the viscosity-time curve of binder at T1, and obtain the first viscosity growth rate constant by fitting, and then the target viscosity growth rate constant at target temperature is obtained by temperature extrapolation;At target temperature, the initial viscosity, construction window period viscosity threshold and target viscosity growth rate constant are used to calculate the predicted value of construction window period at target temperature;When target temperature meets the starting condition of second calibration temperature, introduce second calibration temperature to enhance the prediction accuracy of low temperature section.Compared with prior art, the present application can reduce the test of multiple temperature complete viscosity curve, and improve the engineering reliability of wide temperature zone construction window period prediction.

The application relates to the technical field of sports ground materials, and discloses a semi-precast polyurethane runway cushion material and a manufacturing method thereof. The material is prepared by reacting an isocyanate component (MDI-50, polyether 5000) with a polyether component (polyether 2000, polyether 5000, etc.), and is once formed into an 8mm-thick coiled material through a micro-foaming process, and the performance meets the national standard requirements such as impact absorption of 35-50% and vertical deformation of 0.6-3mm. The manufacturing method comprises vacuum dehydration preparation of the isocyanate and the polyether component, a laminating machine forming process, and the formation of an integral structure without a splicing joint through on-site fixing by a polyurethane adhesive and scraping and coating of a reinforcing layer. The advantages of the application are as follows: factory production solves the performance fluctuation problem of cast-in-place type, a full-polyurethane system eliminates hidden troubles such as splicing joints and delamination, the adhesive strength with a bottom layer / surface layer is greater than or equal to 0.5MPa, the production efficiency is improved by 30%, the comprehensive cost is reduced by 15-20%, and the application has environmental protection and economy.

This utility model belongs to the field of polyurethane wheel coating technology, specifically a polyurethane wheel coating device that is easy to operate. It includes a coating machine body and a clamp. The clamp is mounted on the coating machine body. A lifting cylinder is installed on the column of the coating machine body. A lifting plate is connected to the piston rod end of the lifting cylinder. A transmission rod is driven from the bottom of the lifting plate. A glue storage tank is inserted into the top surface of the transmission rod. A rotating frame is welded to the bottom of the transmission rod. An adjusting slide is slidably provided in the inner cavity of the rotating frame. A solenoid valve is installed on the adjusting slide. The top of the solenoid valve is connected to the transmission rod via a telescopic connecting pipe. In use, the distance between the two sets of glue nozzles can be adjusted to inject glue into polyurethane wheels of different diameters. Simultaneously, the glue nozzles rotate on the mold during glue injection, allowing the glue to be evenly injected into the mold cavity, thus improving the coating quality and efficiency of the polyurethane wheels.

This invention discloses a silane-modified flexible two-component polyurethane adhesive for OLED process protection, and its preparation and application methods, comprising a main agent, a curing agent, and a diluent; the main agent includes polyester polyol or polycarbonate polyol, polyether polyol, antistatic agent, α,ω-dihydroxypolydimethylsiloxane, isocyanate monomer, organic solvent, and catalyst; the curing agent includes isocyanate, polyether polyol, polydimethylsiloxane, small molecule polyol chain extender, defoamer, leveling agent, and organic solvent; the silane-modified flexible two-component polyurethane adhesive for OLED process protection provided by this invention, by bonding antistatic structural units and polysiloxane into the polyurethane molecular chain, results in a polyurethane protective adhesive with excellent antistatic properties, ultra-low peel strength, and good weather resistance, meeting the high-cleanliness and high-precision process standards of OLED.

This invention belongs to the field of polyurethane adhesive production technology, specifically relating to a reaction vessel for polyurethane adhesive production. The reaction vessel includes a tank body, with a stirring motor fixed to the upper end of the tank body. A stirring shaft is fixed to the output end of the stirring motor, and the tank body and the stirring shaft are rotatably connected. Multiple adjustment chambers are sequentially formed inside the stirring shaft from top to bottom. Multiple stirring units are assembled on the outer side of the stirring shaft and inside the tank body. Each stirring unit consists of multiple stirring blades located on the same horizontal plane. This invention uses a vertically positioned sensing plate as a direct viscosity sensing element, which overcomes the oil pressure inside the swing cylinder and drives the sleeve, cross arm, and bushing to produce a corresponding amplitude of horizontal swing. This is transmitted to the stirring blades through an angle adjustment component, achieving automatic adjustment of the stirring blade angle. This allows the stirring blades to dynamically adjust the stirring angle according to real-time changes in the material viscosity.

This disclosure relates to a method for detaching bonded articles, the method comprising the steps of: a) providing a bonded article comprising at least one first adhesive layer inserted between two substrate surfaces, the bonded article further comprising at least one second adhesive layer inserted between the two substrate surfaces, wherein: the first adhesive layer or each of the first adhesive layers has a dry film thickness of 10 to 500 μm; and the first adhesive is a polyurethane adhesive selected from aqueous polyurethane dispersion adhesives and polyurethane hot melt adhesives; b) treating the bonded article at a temperature of 20 to 90°C with a solution of at least one compound selected from a polar solvent: C 10 To C 26 Fatty acids; C 10 To C 26 Salts of fatty acids; and C 10 To C 26 C1-C4 alkyl esters of fatty acids, wherein the solution has a pH of 3 to 14; and c) separating the at least one first adhesive layer from its insertion location between the two substrate surfaces.

The utility model discloses a kind of testing device for polyurethane adhesive, including fixed base, body, control panel, detection head, fixed link, placement plate, material bucket and sliding clamping structure;The utility model slides placement plate, slider will slide along fixed link surface, to ensure the stability when placement plate slides, knob is rotated and drives screw rotation, threaded block will carry out transverse horizontal sliding, then through connecting plate and drive pressing block sliding, pressing block can be pressed in the fixed link surface in sliding mouth, pressing block is pressed in the fixed link surface under the action of friction, can be clamped, clamping is carried out to placement plate by sliding clamping structure, the stability after clamping of placement plate is guaranteed, slider slides along the surface of two fixed links, placement plate can also be guaranteed to not appear skew phenomenon.

This invention relates to the field of road materials, providing a suspended dense polyurethane surface layer composition and a road surface structure. Road surfaces paved with the surface layer composition of this invention not only have a low permeability coefficient and high splitting strength after freeze-thaw cycles, but also exhibit good dynamic stability and 16-hour Marshall stability, enabling rapid traffic opening. The surface layer composition comprises a mixture and a curing agent; the mixture comprises the following components in parts by weight: 86.5-92.0 parts of aggregate, 4.9-7.0 parts of single-component polyurethane adhesive, 3-6 parts of mineral powder, and 0.1-0.5 parts of lignin fiber; the curing agent is a 2-35 wt% aqueous solution of a triol, wherein the triol is selected from one or more of glycerol and trimethylolpropane.

The application belongs to the field of polymer compositions, discloses a high-adhesion polyester composition capable of improving the bonding effect of polyurethane glue, a preparation method and application, and is specifically implemented through the following technical scheme: the high-adhesion polyester composition comprises the following components in parts by weight: polyester resin 60-100 parts, reinforcing filler 0-40 parts, adhesive aid 0.1-3 parts, and other aids 0-10 parts; the adhesive aid comprises one or more of thermoplastic polyurethane, epoxy resin and ethylene-vinyl alcohol copolymer. Compared with the prior art, the application can improve the bonding effect of polyester plastic products and polyurethane glue by modifying the polyester formula of plastic products, can directly bond polyester plastic products and polyurethane glue, does not need to precoat a primer, simplifies the process flow, reduces the production cost, and improves the production efficiency.

This invention discloses a celluloid composite film for out-of-mold decoration processes and its manufacturing method. The composite film comprises, from bottom to top, an injection molding substrate, a polyurethane adhesive layer, a celluloid decorative film layer, a high-transparency polyurethane adhesive layer, and a protective film layer. The injection molding substrate is a PC or ABS injection molded part; the protective film layer is a PMMA or PC film; the polyurethane adhesive layer is used to firmly bond the celluloid decorative film layer to the injection molding substrate, and the high-transparency polyurethane adhesive layer is used to firmly bond the protective film layer and the celluloid decorative film layer together. The aforementioned celluloid composite film for out-of-mold decoration processes, through its composite structure design of the injection molding substrate, polyurethane adhesive layer, celluloid decorative film layer, high-transparency polyurethane adhesive layer, and protective film layer, avoids the defects of poor weather resistance, easy yellowing, poor solvent resistance, and low surface gloss inherent in using celluloid film alone. The double-layer polyurethane adhesive layer enables tight bonding between the film layers, ensuring the overall structural stability of the composite film.

This invention relates to the field of organic polymer adhesives, specifically disclosing a modified castor oil polyurethane adhesive containing catalytic groups, its preparation method, and its application. The adhesive is a two-component compound. By weight, component A comprises 30.0-50.0 parts modified castor oil and 0.0-30.0 parts refined castor oil; component B comprises 30.0-50.0 parts polyisocyanate or a modified polyisocyanate and 0.00-0.05 parts dehydrating agent. The modified castor oil is prepared by first reacting refined castor oil and cysteine ​​hydrochloride via a mercapto-olefin addition reaction, followed by neutralization with a strong base. The modified castor oil simultaneously contains hydroxyl, amino reactive groups, and quaternary ammonium salt catalytic groups, exhibiting rapid reaction with isocyanate groups. The mixture of the two components exhibits certain thixotropy, and the crosslinked product has high strength.

The application discloses a preparation method of a green bio-based polyurethane adhesive for bamboo winding pipes, and specifically comprises the following steps: step 1, fatty aromatic isocyanate, bio-based polyol, a catalyst, a chain extender and acetone are sequentially added into a reaction container, nitrogen is introduced, and then heating and stirring are conducted to obtain a bio-based polyurethane prepolymer; step 2, a bio-based polyurethane emulsion is prepared according to the product obtained in step 1; and step 3, the bio-based polyurethane emulsion obtained in step 2 is blended with a soybean protein solution, a curing agent and nano filler modified by a polyphenol compound, and then uniform stirring is conducted at room temperature to obtain a bio-based polyurethane adhesive for bamboo winding composite pipes. The application further discloses the green bio-based polyurethane adhesive for bamboo winding pipes. The adhesive prepared by the application not only realizes gluing of the bamboo winding pipe, but also reduces consumption of non-renewable resources, and achieves the purpose of environmental protection.

This invention discloses a polyurethane adhesive, its preparation method, and its applications, belonging to the field of secondary battery technology. It addresses the problems of existing adhesives' inability to adaptively repair electrode microcracks and their difficulty in long-term binding of highly expandable active materials, leading to short battery cycle life. The polyurethane adhesive of this application comprises aliphatic polymeric polyol, polyisocyanate, and chain extender in a molar ratio of 1:(1.5~2.5):(0.5~1.5); the chain extender includes aliphatic amino acid esters containing disulfide bonds or aliphatic polyols containing disulfide bonds. When the polyurethane adhesive of this invention is applied to electrodes containing highly expandable active materials, it can achieve long-term binding, thereby improving the cycle life of high-capacity batteries.

The present application relates to the technical field of shaving board preparation, and proposes a kind of flame-retardant shaving board and preparation method thereof, the preparation method of flame-retardant shaving board includes the following steps: step 1: under the protection atmosphere, raw materials such as isophorone diisocyanate, polycaprolactone diol are mixed to prepare prepolymer;Step 2: after the reaction of prepolymer and trimethylolpropane, modified polyurethane emulsion is obtained by emulsification;Step 3: dry shaving and emulsion are mixed, and hot-pressing is formed, to obtain flame-retardant shaving board.Have the advantage: the modified monomer of chemical synthesis in the application is reacted with isocyanate through hydroxyl group, and is chemically bonded into polyurethane adhesive, avoids the migration problem of various additives in traditional physical addition mode, effectively improves the flame-retardant performance, antibacterial characteristics and water resistance of the prepared shaving board.

The application discloses a kind of conveying belt tear damage repair processes, comprising the following steps: S1: the tear damage area and periphery of conveying belt are carried out surface pretreatment;S2: coating primer is applied in the area after pretreatment;S3: after two-component oily polyurethane colloid is mixed uniformly, it is scraped and applied to the primer area;S4: the colloid after scraping and applying is preliminarily cured;S5: the repair area after preliminary curing is kept at constant temperature;S6: the repair area after curing is finished surface finishing, so that it is flush with the surface of conveying belt body.The application compared with prior art has the advantages that: provide a kind of conveying belt tear damage repair process capable of quickly repairing, thereby reducing loss, and guaranteeing the service life after maintenance.

The application discloses a high-performance composite aluminum film packaging bag and a preparation method thereof, and belongs to the technical field of packaging bags. The packaging bag has a three-layer structure, and comprises, from outside to inside, an aluminized film layer, an intermediate film layer and a heat-seal film layer. The aluminized film layer, the intermediate film layer and the heat-seal film layer are connected through a two-component polyurethane adhesive. The two-component polyurethane adhesive comprises a main agent and a curing agent. The main agent contains a Ti3AlC2 / SiO2 composite material modified by distearoyl phosphatidyl ethanolamine-polyethylene glycol-silane and loaded with menthol. Through optimization of the composition of the adhesive, the adhesive not only realizes the close connection between the layers, but also greatly improves the adhesion of the adhesive under high-temperature and high-humidity conditions, thereby guaranteeing the cooking resistance of the packaging bag. In addition, the packaging bag has certain heat storage performance, can better maintain the stability of the internal temperature, and optimizes the use experience of consumers.

This application relates to the field of sewage well structural design technology, and in particular to a sewage inspection well, comprising a crushed stone foundation layer, a backfill stone chip layer, and a well cylinder. The backfill stone chip layer is laid on the crushed stone foundation layer, and the well cylinder is vertically installed within the backfill stone chip layer. A crushed stone pad layer and a concrete layer are sequentially laid on the crushed stone foundation layer. A sheath is installed on the outer peripheral wall of the top of the well cylinder. A gap is left between the inner peripheral wall of the sheath and the outer peripheral wall of the well cylinder, and the gap is filled with a polyurethane sealant layer. A metal reinforcement is also provided between the sheath and the outer peripheral wall of the well cylinder. Some parts of the metal reinforcement penetrate through the bottom of the sheath and extend into the crushed stone pad layer. An inner cover can be detachably installed on the top of the well cylinder. The sewage inspection well of this application, by adding a polyurethane sealant layer and metal reinforcement, makes the connection between the sheath and the well cylinder more secure.

The application belongs to the field of high polymer materials, and particularly relates to a degradable polyurethane adhesive as well as a preparation method and application thereof. The adhesive comprises the following components in parts by weight: PBAT 20-40 parts; polyester diol 20-40 parts; isocyanate 7-11 parts; tackifying resin 20-40 parts; catalyst 0.5-3 parts; and the number average molecular weight of the PBAT is 4000-10000 Mn. The preparation method comprises the following steps: dissolving the PBAT by heating, mixing the polyester diol; adding the isocyanate, adding the catalyst and the terminating agent after cooling; and finally adding the tackifying resin to prepare a glue solution. The adhesive is used for preparing adhesive tapes. The molecular weight of the PBAT is regulated to a specific range, so that the problems of high viscosity, coating difficulty and poor initial adhesion caused by the excessively high molecular weight of the PBAT, and the problems of insufficient cohesive strength, poor holding adhesion and easy residual glue caused by the excessively low molecular weight of the PBAT are solved, the final adhesive can be effectively degraded under the composting condition, and the environmental pollution problem caused by the waste adhesive tapes is solved from the source of the material.

This invention discloses a waterproof and breathable composite fabric and its preparation method, belonging to the field of textile technology. It solves the problem that waterproof and breathable composite fabrics using polyester-based polyurethane adhesives undergo hydrolytic aging during long-term high-temperature, high-humidity, and high-pressure storage. Initial symptoms are often subtle and easily misdiagnosed during testing, leading to sudden delamination and tearing failure due to a sharp drop in interfacial strength upon use, resulting in irreversible damage and rendering the fabric unusable. This invention addresses these issues by eliminating the root cause of ester bond hydrolysis from a materials chemistry perspective, blocking the self-catalytic acceleration loop in the degradation pathway, preventing structural weakening caused by long-term compression in stress distribution, ensuring the fabric can withstand mechanical loads after aging through interfacial bonding, and providing early visual warning intervention for failure identification. This transforms the hydrolytic reaction from a gradual, unpredictable failure into a slow, visible, predictable, and controllable aging process throughout its entire lifecycle, thereby avoiding the risk of sudden and irreparable fabric collapse at critical moments.