2021 results about "Adhesive cement" patented technology

The invention relates to the field of adhesives, in particular to a structural adhesive epoxy composition and a preparation method thereof. The structural adhesive epoxy composition is prepared from the following raw materials: epoxy resin, a toughening agent, a reinforcing agent, filler, a latent curing agent, a latent accelerant, a chemical foaming agent, a physical foaming agent and the like. Finally, the epoxy composition prepared by the invention can be used as a structural adhesive raw material, has ultrahigh expansion rate, low-temperature rapid curing capacity and structural adhesive property, and also has good mechanical properties and excellent comprehensive application effect, so that the complex requirements of the application field of the prior art on the structural adhesive raw material are met.

The invention discloses a high-refractive-index nano-composite optical adhesive and a preparation method thereof, and belongs to the technical field of optical transparent adhesives. The optical adhesive is prepared by taking a polyurethane acrylate oligomer with a specific structure as matrix resin, introducing surface-modified barium titanate and zirconium oxide core-shell nanoparticles as a functional filler, and matching with an active diluent, a photoinitiator and a silane coupling agent in a specific proportion. Through the design of the core-shell structure, the core problems that the high-refractive-index nanoparticles are easy to agglomerate in an organic resin matrix, the dispersion stability is poor and the bonding force with a matrix interface is weak are effectively solved. The prepared optical adhesive has a refractive index of more than 1.65, a light transmittance of more than 99% and a haze of less than 0.3% after being cured, has excellent bonding strength, weather resistance and long-term use stability, and is especially suitable for precise lamination of high-end display devices (such as OLEDs (Organic Light Emitting Diodes) and micro-lens arrays).

The purposes of the present invention is: to provide an adhesive composition which has excellent adhesive force and holding properties in addition to excellent low dielectric properties; to provide an adhesive tape which has an adhesive layer that contains the adhesive composition; to provide a resin molded body which is molded from a resin composition that comprises the adhesive composition; to provide a composite structure which comprises the adhesive tape; to provide an automobile member which comprises the resin molded body or the composite structure; and to provide a method for producing a resin molded body using the composite structure.　The present invention provides an adhesive composition which contains: an acrylic copolymer that has a constituent unit derived from a (meth)acrylic acid alkyl ester, a constituent unit derived from an olefin-based polymer that has a polymerizable unsaturated double bond at an end thereof, and a constituent unit derived from a polar functional group-containing monomer; and a styrene-based elastomer that contains at least one substance selected from the group consisting of a block copolymer which has a block derived from a styrene-based monomer and a block derived from a conjugated diene-based monomer, and a hydrogenated product of the block copolymer.

The invention discloses an electrolytic adhesive, an electrolytic cotton adhesive tape and a preparation method of the electrolytic adhesive. The electrolytic cotton adhesive tape comprises the following components in parts by weight: 5-10 parts of 1, 1 '-ferrocene diformyl chloride, 10-15 parts of acrylic acid beta-cyclodextrin ester, 3-8 parts of polyethylene glycol diglycidyl ether, 10-20 parts of ionic liquid, 1.5-3 parts of a cross-linking agent, 10-15 parts of tackifying resin and 0.5-1.5 parts of an initiator, and a polymer matrix comprises an acrylic acid-hydroxypropyl acrylate copolymer and acrylic acid-2-ethylhexyl ester. Comprising an adhesive layer and an adhesive tape base layer, the adhesive layer is prepared from the electrolytic adhesive, and the adhesive tape base layer is prepared from acrylic foam; the obtained electrolytic cotton adhesive tape has high initial adhesion and viscosity strength after power-on and power-off re-adhesion.

The invention relates to the technical field of ceramic materials, in particular to a method for reducing the surface roughness of a silicon nitride instant-fired sheet, which comprises the following steps: S1, mixing alpha-silicon nitride, beta-silicon nitride, absolute ethyl alcohol and herring fish oil, grinding and dispersing to obtain basic mixed powder; s2, mixing, grinding and dispersing the filling mixed powder, absolute ethyl alcohol and herring fish oil, then carrying out filter pressing and drying, calcining and regrinding to obtain ground filling mixed powder; s3, mixing and ball-milling the basic mixed powder, the ground filling mixed powder, a solvent, an adhesive, a plasticizer and a dispersing agent to obtain slurry; s4, casting the slurry into a film; s5, attaching the thin film to the surface of the silicon nitride green body, and pressing the silicon nitride green body into a whole piece through an isostatic press to obtain a pressed green body; s6, a boron nitride isolation layer is printed on the surface of the pressed green body, and the green body with the isolation layer is obtained; and S7, stacking the green bodies with the isolating layers, and then carrying out adhesive removal and sintering reaction to obtain the silicon nitride ceramic chip.

The invention relates to a light / heat / magnetic detachable high-strength polyurethane adhesive as well as a preparation method and application thereof. The light / heat / magnetic detachable high-strength polyurethane adhesive comprises a polyurethane adhesive and a functional filler. According to the light / heat / magnetic detachable high-strength polyurethane adhesive prepared by the preparation method disclosed by the invention, the colloid is black, and the adhesive has excellent light absorption performance and can realize rapid separation of an adhesive interface under infrared irradiation through a heat effect; meanwhile, the ferroferric oxide can be vibrated and heated under the action of an external magnetic field due to the magnetic response characteristic of the ferroferric oxide, so that fracture and separation of the adhesive layer are promoted. By means of the technology, efficient and reversible disassembly of parts bonded through the hot melt adhesive is achieved, possibility is provided for recycling and reusing of bonding materials and devices, and the problem that traditional polyurethane hot melt adhesive cannot be recycled is solved.

The invention discloses a UV curing adhesive for coating a low-refractive-index optical fiber and a processing method thereof, belongs to the technical field of adhesive preparation, and is used for solving the technical problem that the refractive index and the damp-heat resistance of the UV curing adhesive for coating the optical fiber in the prior art need to be further improved. The preparation method comprises the following steps: introducing a low-refractive-index hybrid siloxane prepolymer, a multi-component interface bonding prepolymer and a modified branched polyester prepolymer into a system together, and constructing a compact and uniform organic-inorganic three-dimensional network in a curing process by utilizing silica condensation, interface chemical bonding and a flexible chain segment cross-linking reaction, the low-refractive-index hybrid siloxane prepolymer endows a film layer with a stable refractive index, the multi-component interface bonding prepolymer enhances the binding force of a base material, the modified branched polyester prepolymer improves stress buffering and toughness, and the obtained cured film is low in refractive index, firm in interface bonding and small in mass change in a humid and hot environment and shows excellent optical stability and long-term reliability.

The invention relates to the technical field of automobile parts, in particular to an automobile rubber sealing part and a preparation method thereof. A metal framework base material is stamped in a numerical control mode, and a framework blank is obtained by controlling deviation through a positioning pin; after being slightly roughened, the blank is phosphatized, coated with a special rubber prime coat adhesive and subjected to infrared drying; weighing the raw materials according to the ratio, feeding into an internal mixer by stages, and mixing at controlled temperature and speed to obtain a rubber compound; feeding the mixed rubber into a double-roller open mill to press a continuous rubber sheet in a step-by-step distance-adjusting manner; performing hydraulic cutting by a special cutting die to obtain a slightly large formed rubber sheet; sticking the molded film to the framework into a mold with a positioning boss, exhausting, boosting and vulcanizing to obtain a semi-finished product; feeding the semi-finished product into a hot air oven and introducing nitrogen for secondary vulcanization; and carrying out laser thickness measurement and visual inspection, packaging qualified products in an anti-static manner, and sealing in a corrugated carton. The framework precision and the rubber bonding strength are improved, and degumming is avoided; stable rubber material performance and uniform rubber sheet thickness are guaranteed, and material shortage is reduced; vulcanization displacement and bubbles are prevented, rubber oxidation and aging are inhibited, and the durability and stability of the product are improved.

The utility model discloses a high-temperature-resistant flash valve exhaust nozzle structure which comprises a pipe body and an energy reduction structure. The energy reduction structure comprises at least two stages of ceramic energy reduction units which are connected in series, and the ceramic energy reduction units are connected in the pipe body; the ceramic energy reduction unit comprises a first-stage energy reduction assembly and a second-stage energy reduction assembly; the first-stage energy reduction assembly comprises a first ceramic spray pipe and a first liner pipe; the first lining pipe sleeves the outer side of the first ceramic spray pipe; the first liner tube is arranged in the tube body; the second-stage energy reduction assembly comprises a second ceramic spray pipe and a second liner pipe; the second lining pipe sleeves the outer side of the second ceramic spray pipe; the second liner tube is arranged in the tube body; the end of the first ceramic spray pipe abuts against the end of the second ceramic spray pipe. And a medium flows out of the pipe body after sequentially passing through the first-stage energy reduction assembly and the second-stage energy reduction assembly from the inlet end of the pipe body. According to the multi-stage energy reduction device, the multi-stage energy reduction assemblies connected in series are adopted, medium pressure can be decomposed into stage-by-stage release, and therefore the fluid speed is effectively reduced, and dependence on a high-temperature adhesive is also avoided.

Disclosed are a two-component low-density PU structural adhesive, a preparation method therefor and an application thereof. The two-component low-density PU structural adhesive is composed of Component A and Component B, where a volume ratio of Component A to Component B is 1:0.8-1.2, Component A includes polyether carbonate polyol, castor oil or / and modified castor oil, bisphenol A polyether polyol, a chain extender, hollow glass beads, molecular sieve, fumed silica, a silane coupling agent and catalysts, specifically, the polyether carbonate polyol and the castor oil or / and the modified castor oil cannot be zero at the same time; and Component B includes isocyanate prepolymer, polyisocyanate, hollow glass beads, fumed silica, and a dehydrating agent, the present disclosure solves the problems of poor storage stability, low bonding strength and low elongation at break of the low-density structural adhesive in the prior art.

The invention discloses an anti-yellowing PVB (Polyvinyl Butyral) adhesive for laminated glass and a preparation method thereof, and relates to the technical field of adhesives. The yellowing-resistant PVB glue for the laminated glass has the advantages that the yellowing resistance is high; the modified PVB / nano silicon dioxide composite material is prepared from the following raw materials in parts by weight: 55 to 65 parts of modified PVB resin, 4 to 6 parts of modified nano silicon dioxide, 15 to 20 parts of dioctyl adipate, 0.5 to 1 part of a compound antioxidant, 0.3 to 0.8 part of an ultraviolet absorbent UV-327, 0.2 to 0.5 part of a silane coupling agent KH-560, 0.3 to 0.6 part of ethylene bis stearamide, 0.1 to 0.3 part of 2-benzimidazole methyl carbamate, 3 to 5 parts of tris (1-chloro-2-propyl) phosphate and 0.1 to 0.3 part of nano titanium dioxide. 5 to 8 parts of isopropanol; 0.8 to 1.2 parts of polycarbodiimide. The special modified PVB resin and the nano silicon dioxide are matched with the auxiliary agents such as the compound antioxidant, the anti-yellowing performance of the PVB glue for the laminated glass is remarkably improved through precise process preparation, the components have a synergistic effect, the process is controllable, the product performance is stable, and the cohesiveness is good.

The invention relates to the technical field of adhesives, in particular to a high-bonding-strength bio-based epoxy adhesive and a preparation method thereof. Comprising 20-50 parts of bio-based epoxy resin, 8-20 parts of a bio-based epoxy flexibilizer, 5-10 parts of an epoxy diluent, 25-60 parts of an inorganic filler, 2-8 parts of a curing agent and 0.2-1 part of a curing accelerator, the epoxy resin adhesive with excellent performance is developed by using a bio-based material as a raw material, has high adhesion to metal aluminum and the like, has excellent toughness, can be widely applied to automobiles, aviation, industry, electronics and other directions requiring shock absorption, impact resistance and structural adhesion, has an excellent economic prospect, and is worthy of popularization and application. Meanwhile, the method has important significance in environmental protection.

The invention discloses a multi-layer cloth hot-pressing bonding process for a waterproof layer of a backpack, and relates to the technical field of hot-pressing equipment, the multi-layer cloth hot-pressing bonding process comprises a hot press main body, a rear table, a guide roller table, a gluing assembly and a hot-pressing assembly, and precise positioning and calibration of multiple waterproof material laminations are achieved through the guide roller table and a deviation rectifying assembly; the bag body is automatically extruded by utilizing material tension during layering, so that accurate control and uniform coating of the adhesive are realized; an electromagnetically-driven partition heating plate is adopted for local fine adjustment of pressure and temperature, and hot pressing uniformity and bonding strength of complex shapes are ensured; and finally, an ultrasonic detection system is integrated, coupling agent spraying is matched for online scanning of the hot-pressed waterproof material, defects such as bubbles, debonding and foreign matter are recognized, positioned and recorded in real time, and closed-loop quality control is formed.

The invention provides a single-component modified silane adhesive as well as a preparation method and application thereof. The adhesive is prepared by mixing the following components: silane modified polyether resin, silane modified polymer resin, a plasticizer, a composite light stabilizer, a filler, a rheological additive, a water removal agent, a coupling agent and a catalyst, the silane modified polyether resin is silane-terminated resin prepared by a hydrosilylation method; the silane-modified polymer resin is a silane-terminated polymer resin containing a urethane bond. The adhesive is excellent in comprehensive performance, the tensile strength of a body is larger than 3 MPa, the elongation at break is larger than 450%, the adhesive is high in adhesion universality to metal base materials, PET films, ceramics, glass, wood floors, PVC, PC, ABS, wood-plastic composite materials and paint faces, the base materials do not need to be specially treated, the damage form is cohesive failure, and the adhesive has good adhesion strength, tear resistance and excellent temperature resistance and is suitable for being applied to the field of wood products. After aging at 120 DEG C for one week, the tensile strength of the body is greater than 3 MPa, the elongation at break is greater than 430%, and the surface layer can be coated after curing.

The invention relates to the technical field of polyurethane structural adhesives, in particular to a two-component polyurethane structural adhesive and a preparation method thereof. Comprising a component A and a component B. The component A comprises, by weight, 70-130 parts of polyether polyol, 1-5 parts of a chain extender, 5-10 parts of a flame retardant, 6-12 parts of a first dewatering agent, 3-5 parts of a thixotropic agent, 0.06-1 part of a catalyst and 110-200 parts of a modified heat-conducting filler. The component B is prepared from 70 to 130 parts of polyurethane prepolymer, 0.5 to 2 parts of second dewatering agent and 110 to 200 parts of modified heat-conducting filler; the technical problems that in the prior art, a polyurethane system adhesive is serious in cohesive strength attenuation under the working condition of 80 DEG C and low in high-temperature shear strength retention rate are solved by providing the double-component polyurethane structural adhesive.

The invention discloses a preparation method of a wave-absorbing adhesive for repairing a wave-absorbing honeycomb and a repairing method of the wave-absorbing honeycomb. The method belongs to electromagnetic wave-absorbing structure damage repair. The wave-absorbing honeycomb is used for preparing the wave-absorbing adhesive, and the preparation convenience can be improved while the complexity of a wave-absorbing honeycomb damage repair material system is reduced. In addition, by means of the repairing method, the influence of a repairing interface on the wave absorbing performance can be effectively reduced, and the original wave absorbing performance of the wave absorbing honeycomb can be better recovered.

The invention relates to the technical field of busbars, and discloses a multi-layer composite fire-resistant shielding busbar and a preparation method thereof, and the multi-layer composite fire-resistant shielding busbar comprises a conductor layer, a fire-resistant layer, a shielding layer and a sheath layer which are sequentially coated from inside to outside; wherein the conductor layer is made of copper or aluminum; the fireproof layer wraps the conductor layer and is formed by wrapping a double-layer PI three-in-one synthetic mica tape. According to the multi-layer composite fire-resistant shielding busbar and the preparation method thereof, the double-layer PI three-in-one synthetic mica tape is used for wrapping, a stable fire-resistant insulation structure is formed outside the conductor layer in a reverse wrapping mode that the first layer is clockwise and the second layer is anticlockwise, and the mica tape is formed by combining phlogopite paper and an organic silicon resin adhesive capable of resisting the temperature of 300 DEG C; the structural integrity can be maintained under the fire high-temperature condition, and electrical short circuit caused by thermal failure is effectively prevented; and meanwhile, the mica tape adhesive layer permeates into the micro-groove structure arranged on the surface of the conductor in the thermocuring process, so that the mechanical occlusion strength is further enhanced.

The invention relates to an adhesive technology based on a laminated spraying copper bar, and belongs to the technical field of copper bar production technologies, and the adhesive technology comprises the following steps: copper bar pretreatment: carrying out processing treatment on the copper bar according to the structural requirements of a design drawing; gluing and laminating are conducted, specifically, the surface of the spraying copper bar 1 and the surface of the insulating plate 2 are evenly smeared with adhesives, the adhesives are placed in an overlapped mode according to design requirements, and the adhesives make contact with one another and are tightly attached to one another; curing treatment is conducted, specifically, the stacked copper bars are put into a drying oven to be subjected to curing treatment; and in the performance test process, the sprayed copper bar is subjected to voltage withstanding alternating current for 10kv for 60s, so that no breakdown and no flashover are realized, and the partial discharge value is less than or equal to 10pC. The insulating plate needs to be selected with proper thickness and size according to electrical performance such as creepage distance and the like. The spraying thickness of the epoxy resin coated copper bar needs to be controlled according to insulation performance and the like. The finished adhesive copper bar has good electrical and insulating properties, and meets the requirements of the power industry for high-performance conductive parts.

The present invention relates to the technical field of aircraft absorbing honeycomb structure damage repair, specifically a method for repairing the electrical properties of damaged absorbing honeycomb cores, comprising the following steps: identifying and marking the outline of the damaged area of ​​the absorbing honeycomb core using nondestructive testing equipment; determining the material system, core cell dimensions, and electrical performance range based on the absorbing honeycomb core structural information; calculating the absorbing honeycomb core skeleton and the absorbing layer duty cycle based on the honeycomb core unit cell margins, wall thickness, and absorbing layer thickness; preparing a new absorbing honeycomb core corresponding to the size of the damaged area of ​​the absorbing honeycomb core, and using a cutting knife to cut along the periphery of the damaged area of ​​the absorbing honeycomb core to remove the damaged absorbing honeycomb core. The present invention selects a small, wave-transparent aramid paper honeycomb core as the skeleton, ensuring consistency with the absorbing honeycomb core material system and facilitating the restoration of mechanical properties. MATLAB mathematical calculation software can be used to calculate the target electrical properties of the adhesive under different small core structural parameters, enhancing the designability of the repair solution.

According to the cationic UV-LED and moisture dual-curing three-proofing adhesive provided by the invention, on the basis of original UV-LED curing, moisture curing is introduced as a synergistic curing mechanism, a UV-LED moisture dual-curing three-proofing adhesive system is jointly formed by combining modified dual-curing resin, an epoxy active diluent, a cationic photoinitiator, an auxiliary agent and the like, an oxygen inhibition effect does not exist, and the moisture dual-curing three-proofing adhesive has the advantages that the moisture dual-curing three-proofing adhesive has a good curing effect; under the adhesive film thickness of 50-200 microns, the cured surface is dry and comfortable and does not adhere to dust or other impurities, the defect that the surface of a traditional mercury lamp curing type UV three-proofing adhesive adheres to hands when an LED lamp is cured is overcome, the curing process is low in energy consumption, electricity is saved, the three-proofing adhesive can be used instantly after being opened, damage to heat-sensitive devices is effectively avoided, no ozone is generated in the whole process, and the three-proofing adhesive is environmentally friendly and safe.

This invention provides an aluminum-plastic composite liquid cooling plate, comprising an aluminum alloy harmonica tube plate, plastic plugs, and aluminum alloy adhesive-filled fasteners. The aluminum alloy harmonica tube plate is provided with liquid flow channels and micropores. The plastic plugs include inlet / outlet plugs and flow guide plugs, which are respectively glued to the aluminum alloy harmonica tube plate. The aluminum alloy adhesive-filled fasteners are sleeved on and glued to the aluminum alloy harmonica tube plate, forming a micro-mortise and tenon structure between the aluminum alloy adhesive-filled fasteners and the micropores. The aluminum alloy adhesive-filled fasteners have recessed mounting grooves and adhesive-filling grooves, with adhesive filling the grooves. The inlet / outlet plugs and flow guide plugs are inserted into and glued to the mounting grooves. The outer periphery of the inlet / outlet plugs and flow guide plugs are respectively provided with sealing protrusions, which, together with the mounting grooves, form an adhesive-filling cavity, which is filled with adhesive. This invention also provides a method for preparing the aluminum-plastic composite liquid cooling plate.

To provide an adhesive strength testing device capable of testing a tensile adhesive strength in the thickness direction of an expansive adhesive with higher accuracy than before.SOLUTION: Provided is an adhesive strength testing device for testing a tensile adhesive strength of an expandable adhesive with respect to a predetermined material, the testing device including: a pair of test pieces made of the material; a spacer; a holding member that presses the test pieces facing each other via the spacer and holds the test pieces such that a space is formed between facing surfaces of the test pieces; and a tensile member that has a first attachment portion attached to a tensile force generator that generates a tensile force and a second attachment portion attached to each of the test pieces from which the holding structure has been removed, the facing surfaces being bonded to each other by the expandable adhesive disposed in the space, and that transmits the tensile force generated by the tensile force generator to each of the test pieces to pull the test pieces in a direction in which the facing surfaces are separated from each other.SELECTED DRAWING: Figure 8

This application relates to the field of polyurethane adhesive technology, and provides a thermally conductive polyurethane structural adhesive and its preparation and application methods. The thermally conductive polyurethane structural adhesive includes a first component and a second component. The first component includes a modified bio-based polyol, a polythiol, a thermally conductive filler, a first dehydrating agent, a thixotropic agent, a first catalyst, and a second catalyst. The second component includes an epoxy resin, a diisocyanate, a polyisocyanate, a thermally conductive filler, a coupling agent, a second dehydrating agent, a dispersant, and a retarder. The modified bio-based polyol is selected from at least one of modified castor oil polyol, modified oil polyol, and modified cashew nut shell oil polyol. The polythiol is selected from at least one of trimethylolpropane tris(3-mercaptopropionate), pentaerythritol tetra(3-mercaptopropionate), butanediol mercaptopropionate, and polythiol. This configuration allows the thermally conductive polyurethane structural adhesive to have a longer open time and to rapidly cure at room temperature in a short time, resulting in high initial strength.

The present invention provides an epoxy resin adhesive and a preparation method thereof, and relates to the technical field of building structure adhesives, the epoxy resin adhesive is prepared from a component A and a component B, the component A comprises the following raw materials by weight: 90-110 parts of epoxy resin, 15-25 parts of a toughening agent, 40-50 parts of a filler I and 15-20 parts of benzyl alcohol, and the toughening agent comprises polycarbonate, polyamide and polypropylene glycol diglycidyl ether; the component B is prepared from the following raw materials in parts by weight: 40 to 60 parts of curing agent, 10 to 20 parts of filler II, 1.5 to 3 parts of polyvinylpyrrolidone and 5 to 10 parts of benzyl alcohol. The preparation method comprises the following steps: S1, preparing A glue; s2, preparing B glue; and S3, mixing glue. The toughening agent is added in the component A, polycarbonate, polyamide and polypropylene glycol diglycidyl ether are selected as the toughening agent, the three raw materials are compounded and cooperated, the processability and flowing property of the epoxy resin adhesive can be effectively improved, and the problems that a cured finished product is high in brittleness and poor in impact resistance are solved.

The invention relates to the technical field of adhesives, and provides a high-thermal-conductivity modified silane polyether adhesive and a preparation method thereof.The silane-terminated polyether sealant is prepared from silane modified polyether resin, modified filler, a flame retardant, a silane coupling agent, a catalyst, an antioxidant and a water removal agent; the modified filler is obtained by grafting a hydroxylated AlN filler or a hydroxylated BN filler or a hydroxylated AlN and hydroxylated BN compound filler with silane under the catalysis of a weak acid to form a Si-O-Al or / and Si-O-B covalent bond network, and then mixing the Si-O-Al or / and Si-O-B covalent bond network with nano silicon dioxide particles of which the surfaces are coated with polydopamine. Through a multi-dimensional filler modification technology and reasonable matching of other auxiliaries, the problem of synergism of heat conduction, flame retardance and mechanical properties of the MS adhesive under a high filling system is solved, and the material is suitable for a new energy power battery module.

The invention relates to the field of pre-coating glue, in particular to moisture-resistant pre-coating glue and a preparation method thereof. The moisture-resistant water-based pre-coating adhesive provided by the invention is prepared from the following substances in parts by mass: a component A: 30 to 60 parts of purified water, 0.5 to 2 parts of an anti-freezing agent, 2 to 10 parts of an emulsifying film-forming agent, 0.1 to 1.0 part of an emulsifying salt-forming aid, 1.0 to 5.0 parts of a film-forming aid, 30 to 50 parts of an acrylate monomer, 5 to 20 parts of a grinding aid, 0.1 to 2 parts of a red pigment and 0.01 to 1.0 part of a curing reaction accelerant; and the component B comprises 2-5 parts of a BPO microcapsule initiator. Meanwhile, the invention provides a preparation method, and the prepared adhesive is a water-based pre-coating adhesive coating, is coated on a bolt, and is used for locking the bolt after being dried. According to the technology, the precoated coating can be stably stored in a high-humidity environment after being dried, and the problems that an existing water-based precoated coating is sensitive to moisture, so that reactive liquid raw materials in the coating seep and flow, and seriously, the coating cannot be cured are solved.

The invention provides an epoxy adhesive solution composition, a preparation method of an epoxy adhesive solution and a modified cellular board. The epoxy adhesive liquid composition comprises the following components in parts by weight: 53-58 parts of epoxy resin, 2-10 parts of a silane coupling agent, 1-10 parts of a curing agent, 1-5 parts of blocked isocyanate and 60-70 parts of water, wherein a blocking group of the blocked isocyanate is selected from hydroxyl, oximido, acylamino, amino, imidazolyl, pyrazolyl or piperazinyl. By introducing the blocked isocyanate with the specific structure, the epoxy adhesive liquid can be subjected to pre-crosslinking reaction in the early drying treatment process, the modulus and high temperature resistance of a formed dry film are improved, and the phenomenon of glue overflow in the subsequent curing stage is inhibited; therefore, the structural integrity and the bonding strength of the adhesive layer in the modified cellular board under the high-temperature condition are improved.

To provide a film thickness measurement method that makes it possible to measure the film thickness of an adhesive even when a crack occurs in the adhesive that is separated from a first member and a second member after a curing step.SOLUTION: A film thickness measurement method for an adhesive comprises a placement step, a curing step, a bonding step, and a measurement step. The placement step is for placing an adhesive on surfaces of bonding sites of a first member and a second member through release sheets. The release sheets are for preventing the first member and the second member from being bonded to each other by the adhesive. The curing step is for curing the adhesive. The bonding step is for taking out the cured adhesive and bonding a film. On the film, a position where the thickness of the adhesive is to be measured is marked. The measurement step is for measuring the thickness of the adhesive at the marked position.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of textile adhesives, and provides a polyurethane hot melt adhesive for a soft-hand-feeling high-elasticity textile and a preparation method of the polyurethane hot melt adhesive, and the hot melt adhesive product comprises a reactive polyurethane hot melt adhesive prepolymer and a polymeric elastomer premix, the hot melt adhesive is prepared from the following components in percentage by weight: 20 to 70 percent of reactive polyurethane hot melt adhesive prepolymer, 20 to 75 percent of high-molecular elastomer premix, 3 to 20 percent of compatilizer, 0.1 to 0.5 percent of defoaming agent, 0.01 to 0.1 percent of catalyst, 0.1 to 0.5 percent of antioxidant and 1 to 2 percent of dewatering agent, when the polyurethane hot melt adhesive is used for laminating high-elasticity cloth such as spandex cloth, the polyurethane hot melt adhesive shows good applicability, the rebound rate of laminated cloth reaches 99.3% or above, and the laminated cloth is soft in hand feeling and smooth in appearance.

The invention belongs to the field of adhesives, and particularly relates to a laser-curable epoxy adhesive as well as a preparation method and application thereof. The laser-curable epoxy adhesive is prepared from the following raw materials: low-viscosity epoxy resin, toughened epoxy resin, epoxy acrylate resin, dopamine modified graphene oxide nanosheets, a curing agent and a thermal initiator in a mass ratio of 1: (0.5-2): (0.75-3): (0.05-0.5): (0.75-2.5): (0.05-0.5): (0-1): (0-0.2): (0-0.15): (0-2) as well as optional epoxy diluent, stabilizer, coupling agent and filler. The laser-curable epoxy adhesive provided by the invention has high modulus and high Tg, and can be rapidly cured.