| 摘要 |
The invention relates to the use of a fluorine-free polyalkoxysiloxane, (a) having a degree of branching VG ≥ 0.4 calculated according to the following formula: VG = (2Q4 + Q3) / (2Q4 + 4/3Q3 + 2/3Q2) in which Qn is determined for n = 0 to 4 using 29Si-NMR, Qn stands in each case for n = 0 to 4 for the area below the 29Si-NMR signal of a (4-n)-times alkoxylated Si atom, and the sum of Qn for n = 0 to 4 is normed to 100%, and b) said polyalkoxysiloxane being produced using a non-hydrolytic polycondensation method, as an additive in coating agent compositions at an amount of 0.1 to 10 wt.% relating to the total weight of the coating agent composition, said coating agent composition containing at least one synthetic polymer selected from the group consisting of physically drying, self-crosslinking reactive or externally-crosslinking reactive synthetic polymers which differ from the fluorine-free polyalkoxysiloxane, and in the case of an externally-crosslinking reactive synthetic polymer, a crosslinking agent which differs from the fluorine-free polyalkoxysiloxane and from said externally-crosslinking synthetic polymer. The invention also relates to coating agent compositions containing aforementioned polysiloxanes as additives, to such additives in solid form, to a method for coating substrates, and to cured coatings which consist of said coating agent compositions. |
