| 摘要 |
<p>Curable two-part flexible film laminating adhesives are prepared from: (a) an alcoholic solution of a ketimine and/or amine terminated polyetherurethane-urea prepared by the addition of at least 50% of the stoichiometric equivalent of a diketimine having-NH functionality of 0, 1 or 3 to an isocyanate terminated polyalkylene ether diol urethane prepolymer; and (b) a polyepoxide in a chain-extending and crosslinking amount of about 10-30% by weight, based on the weight of said ketimine and/or amine terminated polyetherurethane-urea solids. Laminates formed using these adhesives are characterized by rapid curing, high bond strength, superior heat resistance as well as chemical and water resistance.</p> |
