Curing of epoxy resins

in epoxy resin applications, curing agents occupy a very important position"Developing new curing agents is more important than developing new epoxy resins, because some of the resins published in the literature, while of much academic value, have no practical significance, " said one Japanese expertThe development of a new curing agent can solve a problem of epoxy resin application." Epoxy resin itself is a low molecular mass compound containing two (or more) active epoxy bases in the molecule, molecular mass between 300 to 2000, with thermoplastic properties, in normal mild and general heating conditions, will not cure, and therefore does not have good mechanical strength, electrical insulation, chemical corrosion resistance and other properties, can not be directly appliedTherefore, it is necessary to add a curing agent, form a formulation resin, and under certain conditions to cure the reaction, the production of three-dimensional mesh structure products, will show a variety of excellent performance, become a real use of the value of epoxy materialTherefore, curing agent in the application of epoxy resin has an indispensable, even to some extent, plays a decisive role;of course, the addition of a curing agent to epoxy resins does not fully meet the requirements of practical applicationsThinners, fillers, tougheners, colorants, flame retardants, and special lying aids such as anti-sinking agents, tentacles, etcmust also be addedVarious types of grades of curing agents, thinners, ligaments, fillers and other additives, according to the actual use requirements, the purposeful selection of combinations, there will be a variety of formulaUsing these combination techniques can solve technical problems in many fields, forming a wide variety of materials, such as laminated materials, coatings, adhesives, casts (infuses), impregnated materials, plastic sealing materials, envelopes, wear-resistant materials, sealing materials and so onthe solution of the application technology subject, the main face is the choice of materials for cooperationAnd the choice of materials, first of all, the choice of curing agents, and second, the choice of various additivesFor scientific and technological workers engaged in resin applications for many years, mainly by years of accumulated experience, reference to the latest scientific and technological information at home and abroad to choose, and then also need to go through the assessment of experiments to determineFor new beginners engaged in this work, it is often more difficult, the need for a practical processMany foreign scholars are currently using the "molecular design of polymers" technology in the selection of formula materials, and the use of advanced tools - microcomputer processing, so that the cooperation technology in a relatively short period of time to complete, greatly improving the efficiency of workHowever, domestic research in this area is still relatively backward