| 摘要 |
PCT No. PCT/EP97/04821 Sec. 371 Date Mar. 8, 1999 Sec. 102(e) Date Mar. 8, 1999 PCT Filed Sep. 5, 1997 PCT Pub. No. WO98/10028 PCT Pub. Date Mar. 12, 1998Aqueous coatings for the multi-layer painting of motor vehicles based on one or more binders and optionally crosslinking agents, pigments and/or fillers, paint industry additives and/or solvents, which contain as binder an aqueous dispersion based on polyurethane/polymer hybrid polymers having a numerical average of the molar mass (Mn) of 8000 to 1500000, a ratio by weight of polyurethane to polymer content of 0.05:1 to 50:1, a hydroxyl number of 0 to 150 mg KOH/g, based on solid resin, hydroxyl groups bound to silicon not being included when calculating the OH number, and an acid number of 1.5 to 40 mg KOH/g, based on solid resin, and a content of 0.5 to 150 mmole of silicon per 100 g of solid resin in the form of siloxane bridges (-Si-O-Si-) bound into the polyurethane content and/or in the form of silanol groups bound to the polyurethane content. |
