| abstract |
The present application relates to the field of the adhesive industry, and specifically discloses a polyurethane moisture-curing hot-melt adhesive and a preparation method and application thereof. The polyurethane moisture-curing hot-melt adhesive is prepared from polyester polyol, polyether polyol, tackifying resin, chain extender, stabilizer, catalyst and isocyanate in a certain proportion. Melt, then put the melted polyester polyol, polyether polyol and stabilizer into the reaction vessel in turn, add tackifying resin after mixing and vacuum concentration, then add isocyanate and catalyst to react, and then add chain extender to react, The reaction is stopped when the content of -NCO groups in the reaction solution accounts for 2-5wt% of the reaction solution, and the viscosity is 15000-30000cps, and the obtained reaction solution is the polyurethane moisture-curing hot-melt adhesive. This polyurethane moisture-curing hot-melt adhesive is used for furniture panel applications with PETG film and has a peel strength of up to 2.45‑3N/mm. |