A composition including at least one first divalent unit represented by formula: Each Rf is independently selected from the group consisting of Rfa—(O)t—CHF—(CF2)n—; [Rfa—(O)t—C(L)H—CF2—O]m—W—; Rfb-O—(CF2)p-; F(CkF2k)—(O—CkF2k)P—O—CF2—; and CF3—O—(CF2)3—(OCF(CF3)—CF2)Z—O-L1-. Each Q is independently selected from the group consisting of a bond, —C(O)—N(R1)—, and —C(O)—O—. Each X is independently selected from the group consisting of alkylene and arylalkylene, wherein alkylene and arylalkylene are each optionally interrupted by at least one ether linkage and optionally terminated by —N(R1)—C(O)— or —O—C(O)—. R and R1 are each independently selected from the group consisting of hydrogen and alkyl having from 1 to 4 carbon atoms. Rfa represents a partially or fully fluorinated alkyl group having from 1 to 10 carbon atoms and optionally interrupted with at least one oxygen atom. Rfb is selected from the group consisting of CF3CFH— and F(CjF2j)-. Methods of reducing surface tension of a liquid, making foams, and treating a surface using the compositions are also disclosed.
包括至少一个由以下公式表示的第一二价基元的组合物:
每个Rf独立地从以下组中选择:Rfa—(O)t—CHF—(
CF2)n—; [Rfa—(O)t—C(L)H—
CF2—O]m—W—; Rfb-O—(
CF2)p-; F(CkF2k)—(O—CkF2k)P—O—
CF2—; 和
CF3—O—(
CF2)3—(OCF( )—
CF2)Z—O-L1-。
每个Q独立地从以下组中选择:一个键,—C(O)—N(R1)—,和—C(O)—O—。
每个X独立地从以下组中选择:烷基和芳基烷基,其中烷基和芳基烷基各可以被至少一个醚键所中断,且可以以—N(R1)—C(O)—或—O—C(O)—终止。
R和R1各自独立地从以下组中选择:氢和具有1至4个碳原子的烷基。
Rfa表示部分或完
全氟化的具有1至10个碳原子的烷基,并可以被至少一个氧原子所中断。
Rfb从以下组中选择: CFH—和F(CjF2j)-。
还公开了使用该组合物来降低液体表面张力、制备泡沫和处理表面的方法。