耐高温胶粘剂.ppt

耐高温胶粘剂 High temperature adhesive Chemical Engineering and Technology 2010302879 Zhang Peng Applications： Aerospace, electronics, automotive, machinery manufacturing and  other high-tech fields. Definition: At home and abroad so far there ˊs no uniform view on high temperature adhesive .It is generally believed that all the following conditions may be regarded as a high-temperature adhesive: (1) At 121 to 175℃ for long-term use (cumulative 5a) or accumulated in the 204 to 232℃20000 to 40000h.(2) Accumulated at 260 to 371℃ from 200 to 1000h.(3) Accumulated at 371 to 427℃ for 24 to 200h.(4) At 538℃ to 816℃ for 2 to 10min. Classify Organic adhesive  Inorganic adhesive Organic high temperature adhesives High temperature epoxy adhesive High temperature resistant phenolic resin adhesive High temperature silicone adhesive Nitrogen-containing heterocyclic adhesive High temperature cyanate resin adhesive 1、 High temperature epoxy adhesive  Epoxy resin (EP) is the general term that refers to a polymer compound containing twoor more epoxy groups, is a thermosetting resin from a liquid to viscous, solid-state variety of forms.  A curing agent Epoxy resin Essential component： Advantage :(1)High bonding strength(2)Good overall performance(3)Less volatile in the curing process, shrinkage, (4)Long-term work in the -50 to 232℃, the maximum temperature of up to 500 to 1000 ℃ Disadvantage :  Modified epoxy adhesive brittle after curing, mechanical properties, heat resistance  2、High temperature resistant phenolic resin adhesive The phenol resin (PF) is a phenol (or phenols) and formaldehyde polycondensation in the presence of an acid or an alkali catalyst made ​​of a thermoplastic or thermosetting resin, is the earliest development of high temperature resin. Advantage： Having excellent adhesive bonding strength, water resistance, heat resistance, abrasion resistance and chemical stab