Fluorosurfactants
US11820863B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2017 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Mar 27, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12Q1/6806
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a surfactant having a formula selected from the group consisting of: B—((X)x—(CH2)a-A)n(VI), (A-(CH2)a—(X)x—B—(X)x—(CH2)a-A)n (IV), (A-(CH2)a—(X)x—B)n (V), and (B)n—(X)x—(CH2)a-A (VII), wherein A is a perfluoropolyether; a is a positive integer; X is either a covalent bond or a linking group; x is a positive integer; B is a polyalkylene oxide unit; n is a positive integer greater than 1 and, in compounds comprising more than one A, B, X, a and x, each may be the same or different. The present invention also relates to methods of making such surfactants, uses of such surfactants and emulsions comprising such surfactants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.