1285 results about "Epoxy adhesive" patented technology

The invention is a composition comprising applying to a substrate a stream of an adhesive comprising: one or more epoxy resins; one or more rubber modified epoxy resins; one or more toughening compositions comprising the reaction product of one or more isocyanate terminated prepolymers and one or more capping compounds having one or more phenolic, benzyl alcohol, aminophenyl, or, benzylamino groups wherein the reaction product is terminated with the capping compounds; one or more curing agents for epoxy resins and one or more catalysts which initiate cure at a temperature of about 100° C. or greater; and optionally; fillers adhesion promoters, wetting agents or rheological additives useful in epoxy adhesive compositions; wherein the adhesive composition has a viscosity at 45° C. of about 20 Pa.s to about 400 Pa.s. The composition can be used as an adhesive and applied as a stream using a high speed streaming process.

The invention is an epoxy resin based adhesive composition comprising an epoxy resin and a compound comprising an elastomeric prepolymer residue selected from the group of a polyurethane, a polyurea and a polyurea polyurethane having isocyanate end groups, the isocyanate end groups of said prepolymer residue being capped by a capping compound selected from the group consisting of a primary aliphatic, cycloaliphatic, heteroaromatic and araliphatic amine, a secondary aliphatic, cycloaliphatic, aromatic, heteroaromatic and araliphatic amine, a thiol and an alkyl amide, said capping compound being bound to the end of the polymer chain of the elastomeric prepolymer in a manner such that the end to which it is bonded no longer has a reactive group. In addition to the capping compound defined above above, a capping compound selected from the group consisting of a phenol and a polyphenol can be used for capping the isocyanate end groups of the prepolymer residue

The invention relates to an epoxy adhesive composition comprising a) a first epoxy resin, b) a second epoxy resin modified with an acrylonitrile-butadiene rubber, the latter comprising on average less than about 25 weight percent acrylonitrile, and c) a toughener. The total amount of component b) and component c) is higher than about 30 percent based on the total weight of the composition, and the weight ratio of component c) to component b) is greater than about 1:1. The invention further relates to the use of said epoxy adhesive composition for the assembly of parts of a vehicle. It also relates to a vehicle, parts of which are assembled by said epoxy adhesive composition.

An internal wire is formed via an oxide film on the front surface of a semiconductor substrate so as to extend toward the boundary relative to an adjacent integrated circuit region. An upper supporting base is fixedly formed on the front surface of the semiconductor substrate by means of a resin layer of epoxy adhesive or the like, and a lower supporting base is fixedly formed on the back surface of the semiconductor substrate by means of a resin layer of epoxy adhesive or the like, whereby a laminated body is formed. The resin layer and the internal wire are partially removed, leaving a portion of the laminated body, to thereby form an inverted-V shaped groove (a cut-off groove) where a part of the internal wire is exposed to the outside. Thereafter, the resulting cut-off groove is exposed to plasma atmosphere to thereby dissolve, and thus remove, any remaining resin fragments attached to the exposed end portion of the internal wire.

A 2K epoxy adhesive is provided that has rapid cure time and good strength characteristics. Both the epoxy resin composition and the hardener composition of the 2K epoxy comprise a reactive toughener. Such adhesives are useful in the manufacture and/or repair of large machinery (e.g., automobiles), and are useful for bonding like or unlike materials, such as metal and composites (e.g., carbon fiber or glass fiber composites).

The present invention is directed to an adhesive composition, which comprises an epoxy resin, a coupling agent, filler, and an effective amount of an amine-curing agent or curative for said epoxy resin. Advantageously, tri-functional and/or tetrafunctional epoxy resins and/or acrylate monomers will be incorporated into the adhesive composition in order to reduce open time and enhance substrate adhesion. Advantageously, a mixture of amines will be used in the curative including aliphatic amines, which have low viscosities and efficiently wet the substrate for enhancing adhesion; polyamines, which can be used to manipulate open time and allow for improved ratio tolerance of the adhesive system; and amine-terminated rubbers (ATBN), which can improve impact resistance and the toughness of the cured adhesive. Preferred coupling agents are silanes.

The invention relates to a preparation method of high temperature resistant single-component solventless epoxy adhesive. The method comprises the following steps: adding aromatic binary primary amine and strongly polar non-proton organic solvent in a reaction tank, stirring at room temperature to dissolve, adding aromatic binary acid anhydride to perform refluxing and water-segregating reaction at 120-150 DEG C for 6-12h, cooling, adding the reaction solution in a stamp tank with precipitant to precipitate solid powder, namely white thermoplastic polyimide powder, adding white thermoplastic polyimide powder and tertiary amine compound or imidazole compound in epoxy resin to react for 1-2h, adding active diluent and latent curing agent to stir evenly and obtaining the product. The production process is easy and the cost is low so as to realize industrialized production; the tensile shear intensions of the epoxy adhesive at room temperature and 120 DEG C are respectively up to 28Mpa and26Mpa and the epoxy adhesive has broad application prospect in fields such as electronics and microelectronics, electrical motors, aviation and aerospace and the like.

Epoxy adhesive compositions containing a rubber-modified epoxy resin contain a bisphenol. The bisphenol can be pre-reacted with the rubber-modified epoxy resin to advance the resin. The adhesives are resistant to thermal degradation as can occur in so-called “overbake” conditions, in which the adhesive is heated to high temperatures for prolonged periods of time. In addition, expanded microballoons are included in epoxy structural adhesives to promote a desired fracture mode.

The invention relates to a preparation method for a high strength solventless epoxy adhesive. The preparation method comprises the following steps: carrying out reaction on an aromatic primary diamine and an epoxy resin for 0.5 to 2 hours at 60 to 100 DEG C, adding an active flexibilizer, and carrying out reaction for 1 to 3 hours at 80 to 110 DEG C to obtain a modified sticky epoxy resin system; and adding an active diluent and a curing agent in the modified epoxy resin system, and stirring the mixture evenly to obtain the high strength solventless epoxy adhesive. The preparation method has a simple process, low cost, convenient operation and convenient reaction raw material sources, and is capable of completing the preparation process in a general device and facilitates realization of the industrialized production. In addition, the viscosity of the high strength solventless epoxy adhesive reaches 15 to 1,000 Pa.s at 25 DEG C; the bond strength maximally reaches 35 MPa; and the high strength solventless epoxy adhesive has bright application prospect.

A pipe section for concrete includes an end coupler interconnecting to another pipe section in a flow line. The coupler has an outer clamp secured extended from the pipe end with a coupling groove. An encircling clamp has sides located in the grooves of adjacent pipe sections to lock the pipe section together. The body and pipe end form an inner recess extending from the pipe end. An insert liner has a tubular portion matching the recess, with the outer surface of the tubular portion tapered to form a gap within the recess. The insert liner has an outer flange matching the outer diameter of the body and abuts the body. The inner wall of the liner has a central transition point from which the wall tapers inwardly in opposite directions to the outer end. The body member is formed of a high strength ductile steel. The insert liner is formed of a wear resistant material having a Rockwell hardness of 80 to 90. A carbide alloy consisting essentially of carbides, martensite, bainite and austenite, and 12-15% chromium, 2-3% carbon and traces nickel, molybdenum and austenite. A toughened ceramic is disclosed. The liner is adhesively bonded to the body using an epoxy adhesive which is responsive to heat for release of the liner. The liner is inserted by applying adhesive on the tubular portion and then pushing the liner into the recess.

The invention relates to an automobile hemming adhesive and a preparation method thereof, belonging to the technical field of single-component epoxy adhesives. The automobile hemming adhesive is mainly used for bonding an automobile hemming part. The automobile hemming adhesive is mainly characterized by comprising (A) epoxy resin, (B) modified epoxy resin, (C) toughener, (D) epoxy diluter, (E) thermoplastic resin, (F) plasticizer, (G) thermal stabilizer, (H) latent curing agent, (I) coupling agent, (J) filler and (K) pigment. The preparation method comprises the following steps: (1) evenly stirring (E) and (F) at 5-35 DEG C; (2) adding the mixed liquid composition in the step (1), and (A), (B), (C), (D), (G), (H), (I), (J) and (K) into a movable mixer, and evenly stirring at 5-35 DEG C; (3) passing the mixture in the step (2) through a three-roller machine once or twice; and (4) vacuumizing the movable mixer, stirring, defoaming, and discharging for later use. The invention mainly solves the problems of low environmental-protection index, poor technical properties of sizing, short storage period, low modulus, poor moisture and heat resistance and the like in the existing hemming adhesive.

The invention discloses a low-temperature curing high temperature-resistant inorganic/organic hybrid epoxy adhesive and a preparation method thereof, which relate to an inorganic/organic hybrid epoxy adhesive and a preparation method thereof. The invention solves the problems that inorganic/organic hybrid epoxy adhesive prepared by the prior art has poor high-temperature thermal aging resistance and needs high curing temperature. The low-temperature curing high temperature-resistant inorganic/organic hybrid epoxy adhesive is prepared by an epoxy resin, an epoxy resin low-temperature curing agent, a coupling agent, an inorganic active hybrid material and a dispersant. The preparation method comprises the following steps: the epoxy resin, the epoxy resin low-temperature curing agent and the coupling agent are mixed and stirred evenly, and then the inorganic active hybrid material and the dispersant are added into the mixture to be stirred evenly to obtain the low-temperature curing high temperature-resistant inorganic/organic hybrid epoxy adhesive. The low-temperature curing high temperature-resistant inorganic/organic hybrid epoxy adhesive has high high-temperature bonding strength, good high-temperature thermal aging performance and low curing temperature. The low-temperature curing high temperature-resistant inorganic/organic hybrid epoxy adhesive has the advantages of simple production technology, convenient operation and broad application.

The invention relates to a solar battery backboard which takes a modified polyvinylidene fluoride alloy layer as a weathering protective layer. The backboard comprises the following components according to the adhesion in turn: a weathering layer, an adhesive layer, a structure-enhancing layer, a second adhesive layer and a second weathering layer; wherein, the first weathering layer and the second weathering layer are the polyvinylidene fluoride alloy layers modified by inorganic materials; preferably, the polyvinylidene fluoride alloy layer is a plastic alloy layer formed by the polyvinylidene fluoride and the inorganic materials with the thickness of 4-40 mum; the structure-enhancing layer is a polyethylene qlycol terephthalate layer; the first adhesive layer and the second adhesive layer can be one of the following three, namely, a polyurethane adhesive layer, an acrylic ester adhesive layer or an epoxy adhesive layer with the thickness of 1mum-30mum. The invention features novel structure, easily obtained materials, greatly reduced cost and fine performance, conforms to the requirement of backboard, and has important significance on solar energy industry.

The piping component is comprised in part of a metal housing that is positionable with a metal pipe. The metal housing forms an opening in which a piping component body is inserted. The body of the piping component can be fastened to the metal housing using an epoxy adhesive, a set screw connection, a threaded connection, press fit connection, a key connection or a pin connection or a combination of these connections. The body is comprised of plastic, which is less expensive than metal and facilitates forming, including machining or molding, while maintaining its structural integrity in a hostile fluid environment, such as in oil or gas. Piping components such as flowmeters, flow conditioners, small volume provers, static mixers, samplers, and valves are contemplated for use with these multiple materials.

The invention relates to a 2,2-bis[4-(2,4-diamidophenoxy)phenyl]hexafluoropropane high-temperature-resistant epoxy adhesive and a preparation method thereof. The 2,2-bis[4-(2,4-diamidophenoxy)phenyl]hexafluoropropane high-temperature-resistant epoxy adhesive is composed of a component A and a component B, wherein the component A is a copolymer prepared by reacting 2,2-bis[4-(2,4-diamidophenoxy)phenyl]hexafluoropropane and epoxy resin; and the component B is a homogeneous transparent solution with the solid content of 15-30%, which is prepared by reacting 2,2-bis[4-(2,4-diamidophenoxy)phenyl]hexafluoropropane and aromatic dibasic acid anhydride in a strong-polarity non-proton organic solvent and toluene. The preparation method comprises the following step: evenly mixing the component A and the component B in a mass ratio of 1:(1-2) at room temperature. The preparation technique is simple; and the adhesive has excellent comprehensive properties, can be widely used for bonding steel, copper, aluminum or any other metal with ceramic, glass, resin-base composite material or any other substrate, and has favorable industrialization prospects.

An uncured epoxy adhesive comprising a resin component, a hardener component, and a microencapsulated accelerator component. The microencapsulated accelerator component comprises an infrared absorber, an accelerator and a wall that covers substantially the entire surface of the accelerator. The epoxy adhesive is cured by exposing it to infrared energy. The infrared energy is absorbed by the infrared absorber which disintegrates the wall and allows the accelerator to come into contact with the other adhesive components and initiate the curing polymerization reaction.

A stop collar for securing a centralizer in place on a large diameter easing segment comprises a collar adapted for forming an annular chamber when received onto a casing segment. The stop collar is adapted for receiving and retaining a liquid gel epoxy adhesive in the annular chamber until the epoxy sets or cures to secure the stop collar in place on the casing.

The invention discloses a preparation method of room temperature cured high temperature tolerant flexible epoxy adhesive, wherein the adhesive comprises a binding component and a hardening component, wherein the binding component includes flexibilizing constituent, heatproof constituent and plasticity agent, the hardening constituent comprises main hardening agent and hardening accelerating agent. The epoxy adhesive provided by the present invention has good tenacity and high binding strength.