A composition comprising a nonionic fluorinated polymeric surfactant having a weight average molecular weight of least 100,000 grams per mole, the nonionic fluorinated polymeric surfactant comprising: divalent units independently represented by formula (I): in a range from 30% to 65% by weight, based on the total weight of the nonionic fluorinated polymeric surfactant; and divalent units independently represented by formula (II): in a range from 70% to 35% by weight, based on the total weight of the nonionic fluorinated polymeric surfactant. Rf is a perfluoroalkyl group having from 3 to 4 carbon atoms; R and R2 are each independently hydrogen or alkyl of 1 to 4 carbon atoms; R1 is alkyl of 16 to 24 carbon atoms; and n is an integer from 2 to 11. Foams comprising the nonionic fluorinated polymeric surfactant and a liquid hydrocarbon and methods of making and using the foams are also disclosed.
本发明涉及一种组成物,其包含具有至少100,000克/摩尔的分子量平均值的非离子型
氟聚合物表面活性剂,该非离子型
氟聚合物表面活性剂包括:由公式(I)独立表示的二价单元,其重量占非离子型
氟聚合物表面活性剂总重量的30%至65%范围内;以及由公式(II)独立表示的二价单元,其重量占非离子型
氟聚合物表面活性剂总重量的70%至35%范围内。其中,Rf是具有3至4个碳原子的
全氟烷基;R和R2各自独立地是氢或1至4个碳原子的烷基;R1是具有16至24个碳原子的烷基;n是2至11的整数。本发明还公开了包含非离子型
氟聚合物表面活性剂和液态烃的泡沫及其制备和使用方法。