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AssigneeE. I. Du Pont de Nemours and Company
InventorsKeith Ward Hutchenson, Anilkumar Raghavanpillai, Stefan Reinartz
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One aspect of the invention is 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 selected from —NHC(O)NH— or —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. Other aspects of the invention are a composite structure comprising a porous support and a porous nanoweb comprising fibrous structures comprised of one or more compositions of formula (I) and a method for making said composite structures.
A compound of formula (I)
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;
A method for making a composite material comprising a porous support and a porous nanoweb comprising:
Dependencies are inferred from the claim text.
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Materials not provided for elsewhere: for application to surfaces to minimize adherence of ice, mist or water thereto ; Thawing or antifreeze…
Having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by halogen atoms…
Of an acyclic and saturated carbon skeleton: being further substituted by halogen atoms, or by nitro or nitroso groups
Of an acyclic and saturated carbon skeleton: being further substituted by carboxyl groups
About 3 years 4 months of term left · ends 16 Feb 2030 (estimated)
The present invention relates to fluorinated compounds containing short perfluorinated alkyl chains. The compounds are useful as organogelators and surface treatment materials to provide oil- and water-repellency properties to substrates.
Various compositions are known to be useful as treating agents to provide surface effects to substrates. Surface effects include repellency to moisture, soil, and stains, and other effects, which are particularly useful for fibrous substrates and other substrates such as hard surfaces. Many such treating agents are fluorinated polymers or copolymers.
Most commercially available fluorinated polymers useful as treating agents for imparting repellency to substrates contain predominately eight or more carbons in the perfluoroalkyl chain to provide the desired repellency properties. Honda et al, in Macromolecules, 2005, 38, 5699-5705 teach that for perfluoroalkyl chains of greater than 8 carbons, orientation of the Rf groups is maintained in a semi-crystalline configuration while for such chains having less than 6 carbon atoms, reorientation occurs. This reorientation decreases surface properties such as contact angle.
FIGS. 1A and B illustrate a scanning electron micrograph at 2000× and 10,000× magnification, respectively, of a composite according to an embodiment of the present invention.
FIG. 2 illustrates a scanning electron micrograph at 2000× magnification of a composite according to one embodiment of the invention.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present invention, suitable methods and materials are described below. Herein trademarks are designated by upper case. All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety, unless a particular passage is cited. In case of conflict, the present specification, including definitions, will control. In addition, the materials, methods, and examples are illustrative only and not intended to be limiting.
One aspect of the invention is a compound of formula (I) Ro-[L-(CqH2qS)pCrH2rRf]2 (I) wherein
Ro is a divalent organic group having 2 to 40 carbon atoms;