Epoxy adhesives introduction
Epoxy resin (Epoxy) , also known as artificial resins , synthetic resins , resin glue. Is an important class of thermosetting plastic , widely used in adhesives , coatings and other purposes. Artificial resins (Epoxy resins / Epoxy / Polyepoxide) is a thermosetting epoxide polymer .
Most of the synthetic resin epichlorohydrin (epichlorohydrin) (C3H5ClO) and bisphenol A ( BPA ) (bisphenol-A) (C15H16O2) from a chemical reaction .
Its basic structure is named Epoxy Epoxy Epoxy group structure. Bisphenol A type epoxy resin is the most common epoxy resin.
The epoxy adhesive based on epoxy resin system from distribution , production, and with the most bisphenol A type epoxy resin , phenol by two propane and epichlorohydrin in the base-catalyzed condensation variety of different molecular weight linear polymer obtained .
Epoxy adhesive characteristics
Low toxicity, little harm
The cured product of the epoxy glue tasteless non-toxic, harmless to human body
Relay sticky , high bonding strength
Epoxy adhesive containing an epoxy group , a hydrocarbon group , an ether bond , amine , ester bond polar group , a variety of substances have strong sticky relay. Cohesive force is large and the formation of a chemical bond with the metal surface after it is cured binding , thus exhibiting a high bonding strength
Good chemical resistance , excellent electrical properties
Because the molecules containing an ether bond tightly packed molecular chains crosslink density and large, solid and solvent oil and acid and alkali water corrosion resistance .
Use
Process resistance and easy to use
It has a good mix of brushing sexual penetration , cured easily , just contact pressure can be warm and cold curing , high temperature heat curing can be very convenient.
Because the use of wide temperature , strong adaptability , the general temperature from -60 to 150 degrees if using new fillers with a special epoxy resin and curing agent can be configured cryogenic rubber , high temperature rubber , conductive adhesive, medical adhesive , water, and other special adhesive glue , various forms of energy to meet the requirements .
Conclusion
Epoxy has a wide range of uses, can be bonding metals , such as aluminum , steel , copper, stainless steel , lead and various alloys ; also bonding in ceramics, glass, plastic , wood , concrete and other non-metallic materials ; allow metal and non-metallic materials do bonding .
Although there are adhesive known, but untreated polyethylene , polypropylene, polyvinyl chloride , polystyrene, Teflon and other plastics no bonding between Object glue, leather bonding ability is poor , in addition to sticky then outside , but also for infusion epoxy adhesive , sealing, anti-corrosion, insulation, electrical conductivity , etc. make it in the aviation , space , missile , shipbuilding , machinery , weapons , electronics, appliances, construction, furniture, automotive, railway, medical with transportation and other areas are very broad, is a very easy to use adhesive.