| 摘要 |
Aqueous polyurethane- and/or polyurethane-urea dispersions comprise polyurethane and/or polyurethane-polyurea having terminal carboxyl groups and additionally lateral sulfonate- and/or carboxylate groups. Independent claims are also included for: (1) preparing the aqueous polyurethane and/or polyurethane-urea dispersions, comprising converting components (a), (b), (c) and optionally (f) in a single- or multi-step reaction to an isocyanate functional prepolymer and subsequently reacting isocyanate functional prepolymer with component (d) and optionally (e) in one reaction step or two reaction steps, dispersing the obtained product in water and distillatively removing the product optionally with used solvents during or after the dispersion; (2) binding agent combinations comprising (ia) the aqueous polyurethane or polyurethane-urea dispersions; and (3) a substrate coated or bonded using the binding agent combinations. |
