A description is given of an optionally fluorinated polyurethane-polymer hybrid dispersion with enhanced surface properties (low critical surface tensions γ
c
and very high contact angles θ) which is obtainable by a) preparing a dispersion component (binder) based on an aqueous solution or dispersion of an optionally hydroxy- and/or amino-functional polyurethane-polymer hybrid having optionally fluorinated side chains and, if desired, b) subsequently reacting the dispersion component from stage a) with a crosslinker component (D). The polyurethane-polymer hybrid dispersion of the invention can be prepared in solvent-free or low-solvent fashion and with high solids content and requires only a very low level of stabilizing groups.
介绍了一种可选
氟化聚
氨酯-聚合物混合分散体,该分散体具有更强的表面特性(低临界表面张力 γ
c
和极高接触角 θ)的分散体(粘合剂),该分散体可通过以下方法制备:a) 以具有可选
氟化侧链的可选羟基和/或
氨基官能团聚
氨酯聚合物杂化物的
水溶液或分散体为基础,制备分散体组分(粘合剂);如果需要,b) 随后将 a) 阶段的分散体组分与
交联剂组分 (D) 反应。本发明的聚
氨酯-聚合物混合物分散体可以无溶剂或低溶剂方式制备,固体含量高,只需极少量的稳定基团。