The main components of polyurethane potting glue

Potting glue, also known as Electronic potting glue, is widely used for sealing, potting and coating protection of electronic components. Polyurethane potting glue and epoxy potting glue are often used, so what is the difference between the two?

Polyurethane(PU)Potting The main components of the glue are polyisocyanates and polyether polyols, which are used in the catalyst(triethylenediamine ）cross-linkingReactionand solidification to form a polymer. PolyurethanePotting gluehas good bonding properties, insulation properties and weather resistance. Its hardness can be adjusted by adjusting the concentration of diisocyanate and polyether polyol. content to change. Mainly used for packaging of various electronic and electrical equipment.

Epoxy resin glue, like polyurethane glue, can be made into two-component glue. Epoxy resin potting glue is generally composed of bisphenola epoxy resin, curing agent (amine or acid anhydride), reinforcing additives and fillers. It can be cured at room temperature for long periods of time or with heat. After curing, the bonding strength is high and the hardness is generally high. It can be made into transparent potting glue for packaging electrical modules, diodes, etc.

For double groups The usage method of potting glue is basically the same. The general process is: Ingredients——Mixed——vacuum——irrigation Seal——Cure. Of course, this process can use two-component potting equipment, which simplifies The entire operation process saves operating time and reduces the waste of raw materials.

Title of this article: Main components of polyurethane potting glue

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