A composition for imparting surface properties to substrates comprising a polymer of at least one polyurethane having at least one urea linkage prepared by:
(i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, having isocyanate groups, and (b) at least one fluorinated compound selected from the formula (I):
R
f
1
-L-X (I)
wherein
R
f
1
is a monovalent, partially or fully fluorinated, linear or branched, alkyl radical having 2 to 100 carbon atoms; optionally interrupted by 1 to 50 oxygen atoms; wherein the ratio of carbon atoms to oxygen atoms is at least 2:1 and no oxygen atoms are bonded to each other;
L is a bond or a linear or branched divalent linking group having 1 to about 20 carbon atoms, said linking group optionally interrupted by 1 to about 4 hetero-radicals selected from the group consisting of —O—, —NR
1
—, —S—, —SO—, —SO
2
—, and —N(R
1
)C(O)— wherein R
1
is H or C
1
to C
6
alkyl, and said linking group optionally substituted with CH
2
Cl;
X is an isocyanate-reactive group selected from the group consisting of —OH, —N(R)H, and —SH; and thereafter
(ii) reacting with (c) water and (d) 0.05 to about 2.0 % by weight of an isocyanate-reactive fluorinated particulate component, based on a total dry weight of the composition.
一种用于赋予基材表面性能的组合物,包括至少一种聚
氨酯聚合物,其具有至少一种
脲键,制备方法如下:(i)反应(a)至少一种具有异
氰酸基团的二
异氰酸酯、多
异氰酸酯或其混合物,以及(b)选择自式(I)中的至少一种
氟化合物:Rf1-L-X (I)其中,Rf1是一种单价、部分或完
全氟化的、线性或支链的烷基基团,具有2至100个碳原子,可选地由1至50个氧原子中断;其中,碳原子与氧原子的比率至少为2:1,且没有氧原子相互键合;L是一种
化学键或线性或支链的双价连接基团,具有1至约20个碳原子,该连接基团可选地由1至约4个异原子基团中断,所述异原子基团选自由—O—、—NR1—、—S—、—SO—、—SO2—和—N(R1)C(O)—组成,其中,R1为H或C1至C6烷基,并可选地用
CH2Cl取代该连接基团;X是一种
异氰酸酯反应基团,选自—OH、—N(R)H和—SH组成;然后(ii)与(c)
水和(d)0.05至约2.0重量%的
异氰酸酯反应性
氟化颗粒组分反应,基于组合物的总干重。