Modified Polyurethane Adhesive Preparation and Curing

Preparation and curing Preparation of modified polyurethane Dissolve epoxy resin in tetrahydrofuran and dimethylformamide first, and react with toluene diisocyanate and ethylene glycol at a certain temperature for several hours. Add catalyst Dibutyltin dilaurate Accelerate the reaction.

When used, the prepolymer, modified polyurethane solution, quicklime, and glycerin are mixed evenly, and it is determined whether or not to add a solvent according to the conditions of the gluing. Solvent is allowed to evaporate after gluing. After the viscosity is increased, bonding is performed. Curing at room temperature requires 2 to 7 days.

Application The rubber adhesive layer has good flexibility and plasticizer resistance, and is suitable for bonding between soft polyvinyl chloride or metal, non-metal and other materials, and is particularly suitable for bonding on wet surfaces.

Reprinted from: 21st Century Fine Chemicals Network