Partially fluorinated ureas and amides
AssigneeE. I. Du Pont de Nemours and Company
InventorsKeith W. Hutchenson, Anilkumar Raghavanpillai, Stefan Reinartz
Life of this patent
Estimating the term…
Abstract
Disclosed are certain partially fluorinated amide compounds and composite materials containing the compounds. Also disclosed are methods for making the composite materials.
Claims13
A composition comprising super-critical carbon dioxide and a compound of formula (I)
- Ro-[L-(CqH2qS)pCrH2rRf]2 (I)
- wherein
- Ro is a divalent organic group having 2 to 40 carbon atoms;
- L is a linking group, —C(O)NH—, wherein the left side of the linking group is bonded to Ro;
- p is an integer of 0 or 1;
- q is an integer of 2 to 10;
- r is an integer of 1 to 10;
- and
- Rf is a linear or branched C1-C6 perfluoroalkyl group.
A composite material comprising a porous support and a porous nanoweb, wherein said porous nanoweb comprises fibrous structures of about 10 nm to about 1000 nm effective average fiber diameter as determined with electron microscopy;
- said fibrous structures comprising one or more compounds of formula (I):
- Ro-[L-(CqH2qS)pCrH2rRf]2 (I)
- wherein
- Ro is a divalent organic group having 2 to 40 carbon atoms;
- L is a linking group, —C(O)NH—, wherein the left side of the linking group is bonded to Ro;
- p is an integer of 0 or 1;
- q is an integer of 2 to 10;
- r is an integer of 1 to 10;
- and
- Rf is a linear or branched C1-C6 perfluoroalkyl group.
A method for making a composite material comprising a porous support and a porous nanoweb comprising:
- (a) providing a porous support;
- (b) providing a gelling mixture comprising one or more solvents and one or more organogelator(s);
- (c) applying the gelling mixture to the porous support;
- (d) inducing said organogelator(s) to form a nanoweb gel;
- and
- (e) removing the solvent(s) from the nanoweb gel to provide a dry porous nanoweb coating on said porous support;
- wherein said organogelator(s) is one or more compositions of formula (I):
- Ro-[L-(CqH2qS)pCrH2rRf]2 (I)
- wherein
- Ro is a divalent organic group having 2 to 40 carbon atoms;
- L is a linking group, —C(O)NH—, wherein the left side of the linking group is bonded to Ro;
- p is an integer of 0 or 1;
- q is an integer of 2 to 10;
- r is an integer of 1 to 10;
- and
- Rf is a linear or branched C1-C6 perfluoroalkyl group.
Dependencies are inferred from the claim text.