792 results about "Single component" patented technology

A vehicular glass window panel assembly includes a glass panel having an inner side and an outer side, and a handle and catch element adhesively bonded along a first perimeter region of the inner side. The handle and catch element includes a handle portion and a catch configured for engaging a latching element of a vehicle when the window panel assembly is mounted at the vehicle to close over an aperture of the vehicle. The handle and catch element is formed as a single component via a plastic injection molding process. With the latching element engaged with the catch, the window panel assembly is secured at the vehicle. With the latching element disengaged from the catch, the window panel assembly is removable from the vehicle. With the window panel assembly removed from the vehicle, the handle portion is graspable by a user to carry the window panel assembly.

The invention discloses a dual-curing 3D printing resin, the dual-curing 3D printing resin comprises an acrylate oligomer containing a dynamic covalent bond and a blocked isocyanate cross-linking agent, and the acrylate oligomer containing the dynamic covalent bond is obtained by reacting an isocyanate-terminated oligomer with acetoacetic acid ethylene glycol methacrylate. The internal molecular structure and the crosslinking density of the dual-curing 3D printing resin can be changed through heat treatment after light curing, and the dual-curing 3D printing resin has excellent stability and can be stored and used in a single-component mode.

The invention discloses a rare-earth metal arylamine group compound as well as preparation method and application thereof. The invention discloses the rare-earth metal arylamine group compound which is characterized in that a general formula of the rare-earth metal arylamine group compound is (2,6-R12PhNH)5LnLi2(THF)2, wherein Ln is a rear-earth metal selected from one of neodymium, samarium, ytterbium or yttrium; R1 is selected from one of hydrogen, methyl or isopropyl. The rare-earth metal arylamine group compound has the advantages that the rare-earth metal arylamine group compound has a definite structure; raw materials used in the preparation method are simple, easily obtained and cheap; the reaction process is simple and easily operated; the rare-earth metal arylamine group compound product is conveniently purified and the yield of the product is high; the rare-earth metal arylamine group compound has a high activity when acting as a single component catalyst to catalyze a hydrogen phosphine reaction of aldehyde or ketone and phosphite ester; the use amount of the catalyst is less; the yield is high; a substrate has wide universality; a new and simple method is provided for synthesis of a-hydroxyphosphonate.

The invention relates to the field of high polymer materials, and discloses a degradable environment-friendly plastic, which comprises 20-50% of polylactic acid, 10-30% of polyhydroxyalkanoate, 5-20% of a starch-based material, 1-10% of a nano reinforcing agent, 0.5-5% of a self-repairing microcapsule, 2-10% of a bio-based plasticizer, and 0.1-3% of a natural antioxidant. Compared with an environment-friendly plastic scheme only adopting a single component of PLA or PHA in the prior art, the environment-friendly plastic disclosed by the invention adopts a composite formula comprising polylactic acid, polyhydroxyalkanoate, a starch-based material, a nano reinforcing agent, a self-repairing microcapsule, a bio-based plasticizer and a natural antioxidant; according to the present invention, the overall performance of the material is improved, and the degradation rate and the degradation process are optimized, such that the plastic material can maintain the high strength and the high toughness, and can be efficiently degraded in the natural environment so as to effectively solve the problems of incomplete degradation and insufficient mechanical property of the traditional single material.

The invention discloses a bio-based benzoxazine adhesive as well as a preparation method and application thereof. The molecular formula of the bio-based benzoxazine adhesive is shown in the specification. The biomass material isoliquiritigenin is used as the raw material of the benzoxazine resin adhesive, the synthesized benzoxazine resin structure contains phenolic hydroxyl groups protected by keto groups of adjacent chalcone, and the curing temperature can be reduced while the bonding strength of the benzoxazine resin and a matrix can be effectively improved; secondly, carbon-carbon double bonds of chalcone groups in the isoliquiritigenin can further improve the crosslinking density of benzoxazine through photodimerization and thermocuring crosslinking reaction, and the bonding strength is improved; and finally, the synthesis steps are simple, the yield is relatively high, the cured benzoxazine resin has very excellent adhesive property, thermal property and mechanical property, the product component is single, compounding is not needed, no formaldehyde is emitted, the synthesis process is easy to implement, and the benzoxazine resin is suitable for large-scale production. # imgabs0 #

The invention discloses a low-thermal-expansion-coefficient adjustable Poisson's ratio element based on triangular arrow structure invar alloy basic units and a preparation method and application of the low-thermal-expansion-coefficient adjustable Poisson's ratio element. The element is obtained in the mode that invar alloy basic units of a triangular arrow structure pass through a quadruple rotation array to obtain a plane, overlapped parts are removed, and then spatial curl connection is conducted. Each basic unit is composed of a triangle and a concave structure located at any vertex of the triangle, and the whole basic unit is of an axial symmetry structure. According to the element, invar alloy serves as a single-component raw material, adjustment and control of the Poisson ratio of the element are achieved through triangular arrow structural design, integration of the low thermal expansion coefficient and the adjustable and controllable Poisson ratio is finally achieved, and the problem that in the prior art, elements with the low thermal expansion coefficient and the adjustable and controllable Poisson ratio adopt multi-component materials is effectively solved; the support can be integrally formed through a laser powder bed melting process, the process is simple, the integrity is high, industrial production is facilitated, and the performance requirement of the star-sensitive satellite support can be met.

The invention provides a modified single-component polyurea waterproof coating as well as a preparation method and application thereof and a hydraulic concrete protective coating structure, and relates to the technical field of hydraulic concrete protection. The modified single-component polyurea waterproof coating provided by the invention is prepared from the following raw materials by mass: polytetrahydrofuran polyol, polyether triol, fluorine-containing polyether polyol, FEVE type fluorocarbon resin, organic silicon polyether glycol, a water repellent agent, isocyanate, a defoaming agent, a diluent, a dispersing agent, a catalyst, a latent curing agent, a coupling agent, a water removal agent, a pigment filler, a thixotropic agent and a plasticizer. The modified single-component polyurea waterproof coating has excellent comprehensive mechanical properties, anti-icing adhesion performance and ice pulling resistance, and the problem of freezing injury is thoroughly solved; the surface roughness is low, the hydrophobicity is high, and resistance and roughness are reduced; the water resistance is high; the coating is high in adhesive force. The modified single-component polyurea waterproof coating is applied to cold region hydraulic concrete anti-freezing damage protection engineering, and the long-term operation protection performance is good.

The invention belongs to the technical field of polyurethane waterproof coatings, and particularly relates to a single-component fluorine-free high-hydrophobicity polyurethane waterproof coating and a preparation method thereof, and the single-component fluorine-free high-hydrophobicity polyurethane waterproof coating comprises the following raw materials by weight: 60-80 parts of composite polyether polyol; 20 to 40 parts of silane modified polyether polyol; 11 to 17 parts of diisocyanate; 2-5 parts of a chain extender; 50 to 70 parts of a plasticizer; 50 to 70 parts of filler; 0.15 to 0.2 part of a catalyst; and 3-5 parts of an auxiliary agent. A polyoxypentene ether chain segment, a castor oil-based structure and a silane group are introduced into the molecular structure of the waterproof coating through chemical modification, the intrinsic hydrophobic and mechanical properties of the material are improved, the migration defect caused by addition of a hydrophobic agent and silicone oil in a traditional preparation method is overcome, and the invention further provides a preparation method of the waterproof coating.

An organic silicon resin toughening agent, a single-component high-strength epoxy structural adhesive, and preparation methods for both. The organic silicon resin toughening agent is prepared by reacting epoxy modified hydrogen-containing silicone oil and vinyl six-membered cyclic oligomeric silsesquioxane; and the epoxy modified hydrogen-containing silicone oil is prepared by reacting allyl alcohol glycidyl ether and hydrogen-containing silicone oil which contains hydrogen at both ends. Compared with toughening agents such as nitrile rubber and core-shell structured rubber, the synthesized organic silicon resin toughening agent having a cyclic mesh structure unit in the present invention has better high and low temperature resistance, and can significantly improve the high and low temperature resistance of the single-component high-strength epoxy structural adhesive while improving the toughness of the single-component high-strength epoxy structural adhesive.

The invention relates to a single-component epoxy adhesive. The single-component epoxy adhesive comprises epoxy resin, a sulfur-containing polymer containing an epoxy end group and a latent curing agent, wherein the epoxy-terminated sulfur-containing polymer is a reaction product of an epoxy-terminated monoolefine compound and a precursor polymer, and the precursor polymer is a polymerization product of a double-terminated mercaptan compound and a vinyl-containing organosilicon compound; wherein the weight ratio of the epoxy resin to the sulfur-containing polymer with the epoxy end group is (0.1-14): 1, preferably (1-5): 1. According to the epoxy adhesive, the sulfur-containing polymer containing the epoxy end group is used, a polar-S-structure with high bond energy (227kJ / mol) is introduced, the oil resistance of the epoxy adhesive can be remarkably improved, the flexibility of the epoxy adhesive can be improved through a chain link of a siloxane structure, and the solvent resistance of PDLC edge sealing can be remarkably improved through the structure.

The invention relates to the technical field of chemistry, and mainly relates to carboxyl-terminated nitrile rubber modified epoxy resin and a preparation method thereof, and a high-strength single-component adhesive for vehicles and preparation and use methods thereof. The preparation method of the carboxyl-terminated butadiene-acrylonitrile rubber modified epoxy resin comprises the following steps: adding carboxyl-terminated butadiene-acrylonitrile rubber into epoxy resin E51, adding an initiator, heating, carrying out a first stirring reaction under vacuum, adding polyether amine T5000, and carrying out a second stirring reaction to obtain the carboxyl-terminated butadiene-acrylonitrile rubber modified epoxy resin. The carboxyl-terminated nitrile rubber modified epoxy resin prepared by the invention is good in performance, and can improve the mechanical strength and the bonding strength after being applied to an adhesive. According to the invention, the aliphatic carbon long chain is added, so that a chain segment composed of a cured product is softer and higher in degree of freedom, the toughness of colloid is better, and meanwhile, the introduced aliphatic long chain is also beneficial to improving the low-temperature resistance of the adhesive and improving the defect that epoxy resin is easy to brittle and crack at low temperature.

The invention is applied to the technical field of polishing pad preparation, and particularly discloses a preparation method of a high-density and high-hardness foamed polyurethane polishing pad, which comprises the following steps: S1, raw material pretreatment; s2, a prepolymer synthesis step; s3, a foaming and forming step; s4, demolding and post-processing are carried out; and S5, sheet detection and formula optimization: detecting the hardness and density of the treated polishing pad finished product, and correspondingly adjusting the mixing ratio of the raw materials according to the detection result. According to the preparation method of the high-density and high-hardness foamed polyurethane polishing pad, polyether polyol and polyester polyol are mixed and then react with isocyanate, the polyether polyol and the polyester polyol do not react, and the polyether polyol and the polyester polyol jointly participate in the reaction of the isocyanate after being mixed, so that the high-density and high-hardness foamed polyurethane polishing pad is prepared. The generated polymer combines the advantages of polyether polyol and polyester polyol, and has stronger mechanical properties and chemical resistance than a polymer generated from a single component, so that the quality of a finished product of the polishing pad can be improved.

The invention provides a modified single-component epoxy adhesive and a preparation method thereof. The epoxy resin composition comprises the following components in parts by weight: 100 parts of epoxy resin, 5-20 parts of a multi-beta hydroxyl-carbamate compound, 5-15 parts of a diluent, 3-10 parts of a curing agent, 0.5-1 part of an accelerant, 1-3 parts of a coupling agent and 50-200 parts of inorganic filler. According to the present invention, with the addition of the multi-beta hydroxyl-carbamate compound, the good balance among the performances of the single-component epoxy adhesive is ensured, and particularly the good balance relationship in the shear strength, the impact strength and the temperature resistance is provided so as to well meet the actual requirements;

The invention relates to the technical field of pouring sealants, in particular to a pouring sealant and a preparation method and application thereof, and the pouring sealant comprises epoxy resin, a curing agent and filler; the filler comprises a first filler, a second filler and a third filler; the first filler comprises quartz and / or silica powder; the second filler comprises a flame-retardant filler; the third filler comprises fumed silica. The pouring sealant has excellent high-temperature resistance, compression performance and flame retardance after being cured, is low in flowability, can meet the application requirements of the pouring sealant for mounting the inserts for the airplane, and is particularly suitable for pouring when the inserts of the airplane are mounted at the curing temperature of 120-180 DEG C; moreover, the pouring sealant provided by the invention belongs to a single-component pouring sealant, does not need to be prepared on site when being used, and is simple to operate and convenient to use.

The invention discloses a single-component polyurethane liquid glue which comprises a hydroxyl-terminated polyurethane prepolymer, polyol and isocyanate, and the molar ratio of an isocyanate group to a hydroxyl group is (1.01-5): 1; the hydroxyl-terminated polyurethane prepolymer comprises aliphatic or / and alicyclic isocyanate and polyol, and the molar ratio of an isocyanate group to a hydroxyl group is (0.5-0.99): 1. The preparation method comprises the following steps: firstly, synthesizing a hydroxyl-terminated polyurethane prepolymer, and then taking the hydroxyl-terminated polyurethane prepolymer as a main material to react with a small part of polyhydric alcohols and isocyanate. The polyurethane liquid adhesive synthesized by the two-step method has the performance advantages of high initial adhesion and low hardness, meets the process requirement of normal-temperature coating, can replace an adhesive film product and a hot melt adhesive product, and is applied to composite bonding of fabrics in the textile industry.

The invention discloses a long-acting durable waterproof paint with a self-repairing function and a synthesis method thereof, and relates to the technical field of waterproof paints.The long-acting durable waterproof paint is prepared from self-repairing matrix resin, a bi-component microcapsule self-repairing agent, a fluorine-silicon modified waterproof agent, a nano reinforcing filler and a weather-proof additive; through the synergistic effect of a dynamic disulfide bond and an interpenetrating network, the balance of molecular-level self-repairing and macroscopic mechanical properties is achieved, the efficiency bottleneck of single-component self-repairing is broken through through a two-component microcapsule system, a three-dimensional cross-linked structure of the fluorosilicone modifier endows the super-amphiphobic property, meanwhile, the hydrophobic and oleophobic properties are achieved, and the self-repairing effect is good. In addition, a multi-scale reinforcing system is constructed through the gradient nano filler, so that the crack growth needs to consume higher energy, and finally, the integrity of the microcapsule and the accurate control of the crosslinking degree of the resin are ensured through a specific curing process in the synthesis process, so that the waterproof coating finished product has excellent self-repairing capability, weather resistance and waterproof performance.

The invention belongs to the technical field of coatings, and discloses a single-component waterborne epoxy dip-coating coating for a finned radiator. A YBEP-405E single-component waterborne epoxy emulsion is used as a main film-forming substance, and a carbon nanotube modified fullerene ceramic heat-conducting material, an anticorrosive pigment, a pigment filler, a self-made defoaming and foam-inhibiting agent, an auxiliary agent and the like are added to prepare the single-component waterborne epoxy dip-coating paint for the finned radiator. The carbon nano tube modified fullerene ceramic heat conduction material is matched with the anti-corrosion pigment, so that the heat conductivity and the salt fog resistance of the coating are improved, and the self-made defoaming foam inhibitor eliminates the problem that the coating continuously generates bubbles in construction engineering. The single-component waterborne epoxy dip-coating paint for the finned radiator solves the technical problems of thermal conductivity, corrosion resistance and no bubble in construction of the single-component waterborne epoxy dip-coating paint for the finned radiator in the prior art.

The invention belongs to the technical field of preparation of polyurethane adhesives, and relates to a serinol derivative damp-heat latent curing single-component polyurethane pouring sealant and a preparation method thereof. The problem that the bonding strength is affected due to embrittlement of a cured adhesive layer formed by a common technology is solved. Comprising a serinol derivative damp-heat latent curing agent, a polyurethane prepolymer, a cross-linking agent and a catalyst. The pouring sealant prepared by the invention is free of VOCs emission, safe, environment-friendly and convenient to use, can be continuously cured at room temperature by utilizing moisture in air after being pre-cured at 100 DEG C for 1 hour, is free of bubbles after being cured, is strong in adhesive strength and resistant to damp-heat aging, and can meet the pouring requirements in the fields of electronic component and power battery assembly and the like.

The invention discloses a single-component high-heat-resistance type epoxy adhesive and a preparation method of the single-component high-heat-resistance type epoxy adhesive. The adhesive is prepared from the following components in parts by weight: 30 to 40 parts of N, N-4, 4 '-diphenylmethane bismaleimide; 50 parts of bisphenol F epoxy resin; 36.47 parts of 4, 4 '-diaminodiphenyl sulfone; 20 to 40 phr of phenyl glycidyl ether; 1 to 2 phr of two terminal type epoxy silicone oil; 4 to 6 phr of hydroxyl-terminated polyether sulfone; 10 to 20 phr of boron nitride, the surface of which is modified by gamma-glycidyl ether oxypropyl trimethoxy silane; and 1 to 3 phr of an adhesion promoter. According to the adhesive disclosed by the invention, the heat resistance, the mechanical property, the dimensional stability, the process adaptability and the like are synergistically improved, the use requirements of an aviation structural part on long-term service at 150-180 DEG C and an electronic packaging device on the condition of short-time reflow soldering at about 200 DEG C can be met, and the reliability of the adhesive in a high-temperature environment is remarkably improved.

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 disclosure refers to a waterborne coating composition. Disclosed is a one-component (1K) waterborne basecoat composition, comprising a resin component and a crosslinker, wherein the resin component and the crosslinker are crosslinkable by reaction at 80℃ within 22 min. Also disclosed in a coating system comprising the 1K waterborne basecoat composition. Further disclosed is a substrate coated with the 1K waterborne basecoat composition or the coating system.

The invention discloses a single-component moisture-curing reaction type polyurethane hot melt adhesive for aluminum honeycombs and a preparation method thereof, the hot melt adhesive is prepared from the following raw materials in parts by weight: 15-30 parts of isocyanate, 10-25 parts of poly (1, 6-hexanediol adipate), 5-15 parts of poly (1, 6-hexanediol dodecanoate), 5-15 parts of poly (1, 6-hexanediol isophthalate), 5-15 parts of poly (1, 6-hexanediol isophthalate), 5-15 parts of poly (1, 6-hexanediol adipate), 5-15 parts of poly (1, 6-hexanediol adipate), 5-15 parts of poly (1, 6 The invention relates to a high-temperature-resistant adhesive which is prepared from the following components in parts by weight: 2 to 10 parts of 1, 6-hexanediol-neopentyl glycol ester glycol, 5 to 15 parts of polycarbonate polyether glycol, 10 to 20 parts of polytetramethylene ether glycol, 5 to 15 parts of ethylene-vinyl acetate, 15 to 25 parts of polydodecanedioic acid-hydrogenated phthalic anhydride-methylpropanediol ester glycol, 0.01 to 0.1 part of stabilizer, 0.05 to 0.5 part of antioxidant, 0.05 to 0.5 part of catalyst and 0.1 to 5 parts of adhesion promoter. The hot melt adhesive disclosed by the invention has the characteristics of high bonding strength and excellent weather resistance, and can meet the use requirements of the current furniture market.

The invention discloses a zero-VOC (volatile organic compound) water-based emulsion coating applied to container maintenance and a preparation method thereof. The coating is prepared from the following components in parts by weight: 50 to 60 parts of water-based hybrid emulsion, 1 to 3 parts of coalescing agent, 0.5 to 1 part of wetting dispersant, 0.2 to 0.4 part of defoaming agent, 0.5 to 1 part of adhesion promoter, 0.3 to 0.5 part of thickening agent, 10 to 20 parts of pigment, 3 to 5 parts of anti-rust pigment, 0.5 to 1 part of corrosion inhibitor, 0.2 to 0.4 part of base material wetting agent and 15 to 26 parts of deionized water. Wherein the water-based hybrid emulsion is a water-based single-component acrylic acid epoxy hybrid emulsion, and the coalescing agent is an alcohol ether compound. Under the condition of zero VOC, high performance of the coating is kept, and the coating has the advantages of being high in drying speed, good in salt spray resistance and weather resistance, free of VOC and the like.

A single-component photothermal dual-curing epoxy adhesive. The raw materials, calculated by weight, include: 100 parts of an acrylic / polyurethane dual-modified epoxy resin, 10-40 parts of a low-viscosity epoxy resin, 8-30 parts of an epoxy curing agent, 30-300 parts of an inorganic filler, 2-30 parts of a dispersant, and 0.25-5 parts of a photoinitiator. This adhesive exhibits excellent photocuring activity, high toughness, and excellent high- and low-temperature resistance, while maintaining other properties. The photoinitiator in this system participates in the curing reaction, avoiding the degradation of the adhesive's mechanical and bonding properties due to initiator molecular migration. The adhesive also offers a flexible curing process and minimal curing shrinkage, meeting the weather resistance requirements of semiconductor packaging. This makes it an industrially viable epoxy adhesive for semiconductor packaging.

The present invention is directed to a curable and one component (1K) debondable adhesive composition comprising: a) epoxy resin; b) a curing agent for said epoxy resin; c) an electrolyte; and, d) an electrically non-conductive filler; wherein said composition comprises at least one of: e) a combination of a solubilizer and a toughener; and, f) electrically conductive particles.

The invention discloses a single-component direct coating type waterproof coating, and belongs to the technical field of waterproof coatings. The single-component direct coating type waterproof coating is prepared from the following components in parts by weight: 50 to 60 parts of modified acrylic emulsion, 25 to 35 parts of filler, 3 to 5 parts of coalescing agent, 0.5 to 2 parts of thickening agent, 0.5 to 1 part of defoaming agent and 20 to 30 parts of deionized water. Wherein the modified acrylic emulsion is a mixed emulsion formed by blending a melamine modified emulsion and a fluoroazine modified emulsion. The single-component direct coating type waterproof coating provided by the invention has relatively high weather resistance, water resistance and heat insulation.

The present invention relates to the technical field of epoxy modified acrylic emulsion, and discloses a single-component self-crosslinking epoxy modified acrylic emulsion and a preparation method thereof. The acrylic emulsion prepared by the present invention comprises the following raw materials in parts by weight: 20-100 parts of butyl acrylate, 2-5 parts of alkenyl carboxylic acid, 80-150 parts of methyl methacrylate, 20-50 parts of ethyl acrylate, 4-6 parts of diacetone acrylamide, 2-3 parts of adipic acid dihydrazide, 5-8 parts of hyperbranched functional polyether, 10-20 parts of epoxy resin, 3-5 parts of acrylamide, 1-2 parts of water-soluble initiator, 5-8 parts of reactive emulsifier, 0.2-0.5 parts of buffer, 1-4 parts of neutralizer, and 200-300 parts of deionized water; the acrylic emulsion prepared by the present invention has excellent water resistance, solvent resistance, mechanical properties, stain resistance, UV resistance and stability.

The invention relates to a single-component epoxy adhesive as well as a preparation method and application thereof. The single-component epoxy adhesive is prepared from the following components in parts by weight: 35 to 45 parts of bisphenol epoxy resin, 5 to 20 parts of polyurethane modified epoxy resin, 20 to 30 parts of curing agent, 0.1 to 1 part of fluorocarbon surfactant and 0.1 to 1 part of flatting agent. According to the single-component epoxy adhesive provided by the invention, the leveling agent and the fluorocarbon surfactant are introduced into an epoxy resin system, so that the problem that an epoxy adhesive on the market at present is easy to diffuse and separate out is solved, and the single-component epoxy adhesive also has excellent adhesive property, ageing resistance and reliability.

To provide a liquid spray head that has a low environmental impact, is acid-resistant, and is highly reliable. [Solution] A liquid spray head that sprays liquid from a nozzle comprises a first member, a second member, and a cured product of a one-component adhesive that adheres the first member and the second member, wherein the one-component adhesive comprises a bisphenol-free epoxy resin, a curing agent containing an aromatic amine polymer, and an alkylphenol, wherein the alkylphenol is (a) an alkylphenol having at least one ethyl group, or (b) an alkylphenol having 1 to 3 carbon atoms in the alkyl group and at least one methyl group and one isopropyl group.

The present invention relates to a one-component thermosetting epoxy resin composition, comprising an epoxy resin A having on average more than one epoxide group per molecule, a latent hardener for epoxy resins, at least one heat-expandable microsphere HEM1 with a mean particle size D (0.5) between 2.5 – 22.5 μm and at least one heat-expandable microsphere HEM2 with a mean particle size D (0.5) between 25 - 75 μm. The epoxy resin adhesive is notable for a reduced difference in expansion volumes at 140 °C vs. 200 °C for 30 min, especially after storage at elevated temperatures and humidity.