Introduction of epoxy resin adhesive composition
The epoxy resin adhesive is composed of an epoxy resin, a curing agent, a plasticizer, a promoter, a diluent, a filler, a coupling agent, a flame retardant, a stabilizer, and the like. Among them, epoxy resin, curing agent and toughening agent are indispensable components, and others are determined according to the need.
1. Epoxy Resin Epoxy Resin is a polymer compound containing two or more epoxy groups in the molecule and having a relatively low molecular weight. 1. The type and grade of epoxy resin are many, but bisphenol A glycidol Ether epoxies are often referred to as bisphenol A epoxy resins as the most important class. It accounts for 90% of the total epoxy resin production. The molecular structure is very long and will not be mentioned here! If you want to know, you can click on the epoxy to have a detailed description! Here is only a brief description: 1, bisphenol A epoxy resin, also known as general-purpose epoxy resin and standard epoxy resin, China named E-type epoxy resin, from bisphenol (BPA or DPP) and epoxy Chloropropane (ECH) is obtained by polycondensation under sodium hydroxide.
Depending on the ratio of raw materials, reaction conditions and methods used, viscous liquids of low molecular weight and high molecular weight, high softening point solids with different degrees of polymerization can be obtained. The average relative molecular mass is 300~7000. Appearance is a near-colorless or light yellow transparent viscous liquid or a flaky brittle solid. The epoxy resin itself is a thermoplastic linear polymer, and the viscosity of the liquid resin becomes low upon heating, and the solid resin softens or melts. Soluble in acetone, methyl ethyl ketone, cyclohexanone, ethyl acetate, benzene, toluene, xylene, absolute ethanol, ethylene glycol and other organic solvents.