Tiếng ViệtWhat is epoxy resin?
Epoxy resin- Epoxy glue, also known as component A when using epoxy resin in industrial production applications, epoxy resin is a solution with a color from bright yellow to transparent, there are many different types, but common the most is Diglycidyl ether of Bisphenol A (DGEBA) which is the product of the polymerization process between Epichlorohydrine and Diphenylolpropane (Bisphenol A). Some manufacturers use Bisphenol F to prepare epoxy for products with lower viscosity and increased chemical resistance and other mechanical properties, but these products are rarely found on the retail market.
Physical properties:
Epoxy resin usually exists in 3 forms: Liquid Epoxy Resin – Solid Epoxy Resin – Solution Epoxy Resin depending on the molecular weight of the resin.
Because in the epoxy molecular structure, there are Aromatic rings and ether bonds, so the epoxy resin is resistant to high chemical environments and is resistant to corrosion.
– The presence of polar Hydroxyl groups along the molecular chain increases the ability to adhere to many types of material surfaces.
Besides, the free rotation of 2 Methyl groups in Bisphenol A component is pressed between 2 Aromatic rings, giving Epoxy resin the characteristics of being both hard and flexible.
Epoxy resin has good compatibility with many different resins, including: UF, MF, PF, alkyd resin, nitrocellulose, polyester …
– Epoxy resin dissolves well in many different types of organic solvents such as Acetone, Ester, chlorinated solvents …, low molecular weight resins dissolve easily in Alcohols, large molecular epoxy resins usually dissolve well in Aromatic hydrocarbons. solvents (Toluene, Xylene, Sovesso 100 – 150 …)
– Epoxy resin changes to a 3-dimensional network structure when participating in the curing reaction with Epoxy Curing Agents (will be discussed in detail below) with a shrinkage of 0.5 – 2% depending on the version quality and quantity of curing agent used.
Chemical properties:
Because in the general formula of epoxy resin, there is the presence of epoxy groups at the end of the molecular chain and hydroxyl groups along the molecular chain, so epoxy resin has all the typical reactions of these two groups.
– Reaction between epoxy group with Amino, Carboxylic Acid, Mercaptan groups.
– Reaction between Hydroxyl group with Methylol, Anhydride, Isocyanate groups.
– Reaction between epoxy groups (copolymerization).
Epoxy resin application:
Due to having many good mechanical and mechanical properties, finished epoxy resin is widely used in many industries:
– The most widely used epoxy resin is in the protective coatings industry (paints & industry coatings). Especially used in protective primers for oil pipelines – chemical plants, tanks, chemical tanks, ship paint, offshore works in particularly harsh weather conditions, paint industrial floors (discotheque floors, stadium floors), car paint, motorcycles, bicycles, electric tools…
– Glue: hot curing glue & cold curing glue.
– Flooring.
– Epoxy resin system composite materials.
– Casting.
– Sealant for cracks.
– Waterproofing agent (mixed with concrete).
– Laminates.
-Materials in electrical engineering: insulating materials for motors, conductors, electronic boards
– Stadium running track
-Epoxy jewelry