Method for manufacture high water permeable solvent free polyurethane adhesive

摘要

PURPOSE: A solvent free polyurethane adhesive composition is provided to enable use for an adhesive used for moisture-permeable waterproof fabric due to excellent durability, water resistance, and adhesive force. CONSTITUTION: A solvent free polyurethane adhesive composition includes a diol mixture, diisocyanate compound and catalyst. The diol mixture comprises 20~50 mol% of polyethylene glycol with molecular weight of 1,000~2,000, 20~70 mol% of polyethylene glycol with molecular weight of 1,000~5,000, and 10~30 mol% of polycarbonatediol with molecular weight of 1,000~2,000. Based on 100 parts by weight of the mixture of the diol compound, as a catalyst, 0.01~0.03 parts by weight of dibutyltin dilaurate and diisocyanate so that a NCO/OH ratio of polyester polyol and diisocyanate is 2~3.