Epoxy resin adhesives
Types of epoxy resin adhesives:
⑴ Classified by adhesive form
Solvent free adhesives, (organic) solvent based adhesives, water-based adhesives (which can be divided into two types: emulsion based and water-soluble), paste based adhesives, thin film based adhesives (epoxy film), etc.
⑵ Classified by curing conditions
1) Cold curing adhesive (unheated curing adhesive). It is further divided into:
Low temperature curing adhesive, curing temperature<15 ℃;
Room temperature curing adhesive, curing temperature 15-40 ℃.
2) Heat cured adhesive. It can also be divided into:
Medium temperature curing adhesive, curing temperature is about 80-120 ℃;
High temperature curing adhesive, curing temperature>150 ℃.
3) Other methods of curing adhesive, such as UV curing adhesive, wet surface and water curing adhesive, latent curing adhesive, etc.
⑶ Classified by bonding strength
1) Structural adhesive has high shear and tensile strength, and should also have high uneven tensile strength, so that the bonded joint can withstand loads such as vibration, fatigue, and impact for a long time. At the same time, it should also have high heat resistance and weather resistance. Usually, the room temperature shear strength of steel is greater than 25MPa, and the tensile strength is greater than or equal to 33MPa. Uneven tensile strength>40kN/m.
2) Secondary force structural adhesive, capable of withstanding moderate loads. The typical shear strength is 17-25MPa, and the uneven tensile strength is 20-50kN/m.
3) Non structural adhesive, also known as universal adhesive. Its room temperature strength is still relatively high, but as the temperature increases, the bonding strength decreases rapidly. Can only be used in areas with low stress.
⑷ Classified by purpose
1) Universal adhesive.
2) Special adhesive. Such as high-temperature resistant adhesive (used at temperatures ≥ 150 ℃), low-temperature resistant adhesive (can withstand temperatures of -50 ℃ or lower), strain resistant adhesive (used for attaching strain gauges), conductive adhesive (volume resistivity 10-3-10-4 Ω· cm), sealing adhesive (used for vacuum sealing and mechanical sealing), optical adhesive (colorless and transparent, resistant to light aging, refractive index matched with optical components), corrosion-resistant adhesive, structural adhesive, etc.
⑸ Other classifications
It can also be classified according to the type of curing agent, such as amine cured epoxy adhesive, anhydride cured adhesive, etc. It can also be divided into two-component adhesive and single component adhesive, pure epoxy adhesive and modified epoxy adhesive (such as epoxy nylon adhesive, epoxy polysulfide rubber adhesive, epoxy nitrile adhesive, epoxy polyurethane adhesive, epoxy phenolic adhesive, organosilicon epoxy adhesive, acrylic epoxy adhesive).
Application:
⑴ Coating field
Applied to automobiles: chassis primer, component paint, tank car interior wall coating
Applied to containers: inner and outer wall coatings for food cans, anti-corrosion coatings for inner and outer walls of storage tanks, anti-corrosion coatings for pressure tanks
Applied to factory equipment: anti-corrosion coatings for equipment and pipelines, outer coatings for refrigerators and washing machines, insulation coatings for electrical equipment
Applied in civil engineering: bridge anti-corrosion coating, steel structure anti-corrosion coating, waterproof coating for clay products, floor coating, decorative coating, functional coating, steel wire mesh cement gate
Applied to ships: bottom cargo compartment inner wall coating, marine container coating, steel component anti-corrosion coating
Application in other areas: powder coating for steel furniture, powder coating for resistance elements, powder coating for steel components, anti-corrosion and heavy-duty anti-corrosion super wear-resistant ceramics for valve bodies, shielded vertical pipeline pumps, solar water heaters, solar panels, weapons
⑵ Composite materials field
Applied to automobiles: fiberglass car shell, fiberglass floor, fiberglass tank car, control system instruments and electrical components, displays, automotive dry ignition coils, fiberglass components, anti slip particle steering wheel covers, epoxy resin local reinforcement materials
Applied to factory equipment: fiberglass oxygen cylinders, fiberglass storage tanks, fiberglass containers, pipelines, molds, propellers, weaving machine shafts, aircraft honeycomb structural components, engine covers, rollers, shafts, installation foundation leveling, self leveling floors, electromagnetic coils, pilot valves, fiberglass parts, fiberglass pump valves, carbon products, building engineering structural components, mechanical transmission device components
Applied to insulation materials: copper-clad laminates, fiberglass sheets, tubes, rods, transformers, relays, high voltage switches, insulators, transformers, impedances, cable heads, electronic devices, sealing or encapsulation of components, alarm devices, solid power supplies, FBT flyback transformers, focusing potentiometers, ignition coils for motorcycles, automobiles and other motor vehicles, electronic and electrical components, light-emitting diodes, signal lights, fully enclosed batteries, motor packaging, temperature transmitters, tape recorder heads, circuit board enclosures, integrated circuits, discrete components of diodes and transistors, non source filters, LED structural packaging, encapsulation of solar panels, power components, IC regulators and solid-state relays, coal mine safety inspection systems, intrinsic safety modules, automatic reclosers
Applied to sports equipment: fiberglass safety helmets, rackets, golf clubs, fishing rods, bowling balls, sleds, surfboards, fiberglass rowing boats, sailboats, racing cars, lounge chairs, hockey sticks
Applied to other fields: aircraft fuselage, helicopter spiral blades, wind turbine blades, medical instruments, surgical knife handles, pacemakers, handicrafts and jewelry, valve seals, hydraulic construction engineering, electroluminescent screens, concrete wear-resistant layers, insulation materials, animal models, spacecraft, marine tail shafts, rudder shafts, chemical wood, tower reinforcement, maglev train tracks, solar cell musical instruments, epoxy decorations, fiberglass tent poles, knife handles, windows, furniture, pumps, canes, graphics cards, infrared filters, digital displays, matrix radiators, light-emitting diodes and photodiodes, laboratory countertops, artificial trees, prefabricated grinding stone roads, bridges and road surfaces
⑶ Adhesive field
Application: Room temperature fast curing tough epoxy resin adhesive, conductive adhesive, room temperature curing electrostatic flocking adhesive, optical structural adhesive, sand fox ball adhesive, chemical anchoring adhesive, high functionality of silk, artificial flowers, magnetic writing boards, automotive repair adhesive, stone adhesive, etc.