Industrial and construction adhesives
Different methods are used for gluing and connecting parts and objects, and each of these methods is efficient in different cases. With the help of different types of glue, we can connect or fasten different materials to each other. There are different adhesives in the form of liquid, paste, strip, etc., and in this article we intend to introduce them completely and comprehensively. Stay with Areva to check what glue is and get a complete understanding of the types of glue and its uses.
Maybe you have used different adhesives such as electric glue, glue 1.2.3, etc. in your home or workplace. But there are different types of glue models, whose uses will definitely be attractive to you. It may be hard for you to imagine that you can repair some parts easily with glue or connect them together, but by introducing different types of glues, you can realize that you can easily use special glues for any parts and special materials.
Types of glue
There are different types of glue for different uses in the industry. Adhesives that are produced with different materials and have the ability to adhere to different materials. Various types of construction glue are used to stick materials together or to catch various leaks. We all use different types of glue in our daily life, such as liquid glue, stone glue, electric glue, welding glue, 123 glue, etc.
In the following, we will talk about the types of adhesives and adhesives widely used in the industry and we will examine the features and capabilities of each.
Epoxies are the best known construction adhesives and are the most widely used. Wood glue sticks well to metals, glass, concrete, ceramics and hard plastics and is resistant to oils, water, dilute acids, bases and most solvents. Therefore, they are more useful in gluing vinyl flooring in services and wet places and to metal surfaces. The best known construction adhesives are epoxides and are the most widely used, the most commonly used epoxy resin being made by reacting the sodium salt of bisphenol A with epichlorohydrin. Aliphatic and aromatic amines are also used as hardening agents. These adhesives easily stick to wood, concrete, glass, metals, ceramics and hard plastics and are very resistant to water, dilute acids, oils. Therefore, they are widely used for gluing vinyl flooring in wet areas, services, and to metal surfaces. Double-sided adhesives are the most common type of epoxies found in many homes and industries.
Phenolic adhesives for metals
When phenol reacts with an excess amount of formaldehyde under alkaline conditions in aqueous solution, the product known as resole and oligomeric containing phenols bridged by heterochromylene on benzene rings is obtained. To prevent the formation of vapor-filled voids, phenolic adhesive joints under pressure are usually hardened between heated steel plates by a hydraulic press. Due to the brittle nature of phenolics, polymers such as polyvinyl formal, polyvinyl butyral, epoxides and nitrile rubber are added to make them harder. This liquid glue is based on synthetic phenolic resin and works by heating. Suitable for connecting friction material to brake and clutch.
Formaldehyde compression adhesives for wood
Some of the adhesives used for wood are the result of condensation of formaldehyde with phenol and resocinol (dihydroxybenzene). The rest are condensed with urea or melamine.
Structural adhesives containing acrylic monomers harden by free radical addition at ambient temperature.
Anaerobic adhesives harden in the absence of oxygen, which is a polymerization inhibitor. These adhesives are often based on dimethacrylates of polyethylene glycol. The use of these adhesives is often in the connection of gears, thread locking, reinforcing cylindrical joints and for burglary.
Polysulfides were initially used as anti-theft and an important application is the anti-theft of the edges of double mirrors. Both to hold the units together and create a barrier against moisture penetration. They are prepared by bis(2-chloroethyl formal) with sodium polysulfide and mineral fillers are used to reduce the price. Phthalates and silane coupling reagents are used as softeners, and their hardening agents include manganese dioxide and chromate.
Silicone sealants (aquarium glue)
One component silicone adhesives are often known as RTV adhesives and consist of polydimethylsiloxane (PDMS) with molecular weights in the range of 300-1600 with acetate, ketoxime or ether end groups. These groups are hydrolyzed by atmospheric moisture, forming hydroxyl groups, which are later condensed by removing water. Silicone adhesives are soft and desirable and have good environmental and chemical resistance. These adhesives are known as the best coating for use in the bathroom. This glue is known as aquarium glue in the Iranian market. Due to the many uses of aquarium glue, it can be found in almost all homes. Its main uses:
Probably the most common and popular use for silicone glue (aquarium glue) is in repair, renovation and home construction projects, which is especially used to fill and seal joint cracks and cracks in sinks and toilets. Water-resistant silicone glue (aquarium glue) is regularly used to fill holes and clean any cracks and seams. You can also use it to seal surfaces such as ceramic floors.
Sealing and gluing glass
Aquarium Adhesive is an excellent sealant and sealant that has the capabilities and capabilities of most conventional adhesives, flexible and durable, with strong bonding properties that can be applied to almost any surface, including plastic, metal and glass. One of the most common cases is the use of silicone sealants to stick and stabilize mirrors in bathrooms and toilets.
Silicone sealants are used in different parts of the car. The most important function of silicone sealants in the automotive industry is to protect gaskets under pressure and high temperature in the car engine, etc. (Thermal silicone).
Making a glass aquarium
Making a glass aquarium
Adhesives that harden due to solvent removal:
Contact adhesives: Contact adhesives are probably the most famous adhesives (shoe glue, iron glue, PVC glue) based on solvent. These are solutions of polymer in an organic solvent that are applied to two surfaces to bond. The main material of these adhesives is polychloroprene rubber (polychloroprene, polychlorobutadiene) and they are used to attach decorative covers and other strong plastics such as ABS, DVC to metal products and DIY contact adhesives for shoe beds.
Ointment multipurpose adhesives
Popular solvent-based adhesives sold to the public in ointment-like containers are often solutions of nitrile rubber (hemipolymer or butadiene and acrylonitrile) in organic solvents.
Adhesives that harden by losing water:
Aqueous solutions and pastes: Starch, corn and grains are the main sources for adhesive use. The main uses are for gluing paper, cardboard and textiles. Its applications include corrugated sheets, paper envelopes, tube sealing, wall paper gluing and water rewettable adhesives. Water-wettable adhesives include poly(vinyl alcohol) (DVOH), which are used in postage stamps and are produced from the latex of natural gums (such as gum and dextrin) and polyvinyl acetate (DVN) with a large amount of stabilizer DVOH. DVOH is the only known polymer that is not made from its own monomer.
Tile glue (synthetic latex glue)
These adhesives fill the gaps, making them suitable for fixing polystyrene false ceiling tiles and plastering. You can also use them on floor tiles. Like rubber resin adhesives, they allow a certain amount of movement without cracking.
Filling glue (polyurethane foam glue)
These glues are pressurized in spray cans, these glues fill holes in wood, etc., because the foam expands when it is sprayed. If you need to remove them, you need to prepare a special solvent.
Super glue 123 (cyano acrylate)
These fast-acting adhesives adhere to a variety of small household and industrial items, including metals, glass, ceramics and plastics. But be careful when using them, because the skin will stick to other materials and surfaces, and if you accidentally stick the wrong things, you’ll need to use super special removers to get them off. Super glues are offered in the Iranian market under the name of glue 123 along with activator spray.
PVC glue, PVC pipe glue
These types of adhesives are used for sealing and gluing PVC-U high-pressure pipes. Due to their special solvent, these adhesives dissolve some of the surface of the PVC pipe in themselves, and then after 8 to 24 hours, they create a state like cold welding of plastic in it.