| abstract |
The invention discloses a heat-sensitive high-performance polyurethane adhesive convenient for construction, which comprises a component A and a component B; the component A comprises, by weight, 40-60 parts of polyol resin, 0.2-0.8 part of diazabicyclo compound, 0.2-0.8 part of compound containing hydroxyl and/or carboxyl, 40-50 parts of filler, 1-3 parts of lubricant and 0.5-2 parts of coupling agent; the component B is isocyanate with isocyanate functionality more than or equal to 2. The polyurethane adhesive prepared by the invention has good mechanical property and bonding strength, can obviously prolong the active period and the opening time of the adhesive, has high process fault tolerance, does not have the condition of gun head blockage after shutdown, and can realize continuous production; meanwhile, after the glue is applied for 1min, the surface is smooth and has no air holes through visual observation. In addition, the polyurethane adhesive obtained by the invention has good matching of leveling time and curing time, good leveling property and ductility, can be used for spraying, curtain coating and other processes besides the traditional use mode of the adhesive, and has extremely strong practical popularization significance. |