| abstract |
The invention discloses a preparation method of a modified polyurethane adhesive, which belongs to the technical field of improved materials. The preparation method is as follows: (1) reagent preparation; (2) mixing isophorone diisocyanate, polycaprolactone diol, and polyvinyl alcohol to obtain a mixed solution, and then dropwise addition of dimethylolpropionic acid and N-methylpyrrolidone, fully stirred to obtain a prepolymer; (3) Polypropylene carbonate polyol, 1,4-butanediol, glycerol, methyl acrylate, dibutyltin dilaurate and ethyl orthosilicate The ester is added to the prepolymer of step (2), deionized water is added at the same time, then ultrasonic vibration is performed, and finally sodium persulfate is gradually added dropwise, and it can be kept warm. Compared with the prior art, the use of hard particles is avoided, and the prepared modified polyurethane adhesive has strong comprehensive properties. |