Only signed in users will see discount codes and have complete access to product lines, datasheets and pricelists
BMI-1500 is an amorphous, low molecular weight bismaleimide oligomer that exhibits good adhesion to a variety of substrates. It can be homo-cured via UV or free radical initiators to form tough, hydrophobic, cross-linked polyimides. The material has excellent low pH hydrolytic resistance and thermal stability. The amorphous nature of this imide-extended BMI allows it to form room-temperature-stable solutions in a variety of free radical reactive diluents. It is soluble in many common solvents such as toluene, xylene, MIBK, etc.
BMI-1500 is recommended for use as an additive or base resin in adhesives that are designed for high temperature resistance. It has excellent adhesion to a variety of substrates. When used as a base resin, it can produce adhesives that are tough, flexible and demonstrate good peel strength.
BMI 1400 and BMI 1500 oligomers do not lend themselves to a similar "clean-up/purification" as we did with BMI-689. Despite that, 1400/1500 would likely benefit from the use of some coupling agents - especially as it relates to the post 85/85 adhesion values. These BMI resins are very hydrophobic and have high hydrolytic resistance, meaning water does not degrade the resin.
BMI resins, unless they are used with epoxies or other co-resins, do not have good adhesion to metals and they do have a large void volume. This void volume allows moisture to penetrate to the surface where the adhesion is not so good and further degrade it. However, with the proper use of coupling agents, the interface adhesion is improved and the 85/85 adhesion will follow.