Filtration membrane with covalently grafted fouling-resistant polymer
US8550256B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2012 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Jul 27, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/444
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of photo-grafting onto a separation membrane a copolymer includes at least one of:and;For example, in Structure 1A, x1≧2 and y1≧1; R1 and R2 are independently selected from the group consisting of CH3 and H; R3 is independently selected from the group consisting of poly(oxyalkylene), quaternary ammonium salts, pyridinium salts, sulfonium salts, sulfobetaines, carboxybetaines, alcohols, phenols, tertiary amines, aryl groups; linear, branched and cyclic alkylenes; linear, branched and cyclic heteroalkylenes; linear, branched and cyclic fluoroalkylenes; and siloxyl; R4 is independently selected from the group consisting of linear, branched, and cyclic alkylenes; linear, branched and cyclic hetroalkylenes; linear, branched and cyclic fluoroalkylenes; phenyl; and siloxyl; and Z1 is 0 or 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.