Patent Number: 6,165,545

Title: After-treatment method for imparting oil-and water-repellency to fabric

Abstract: A method is provided for after-treating fabric with a fluoroacrylate emulsion by immersion, typically under poorly-controlled conditions (e.g. field conditions), and a second embodiment of this method is provided for treating large, previously manufactured items comprising fabric (e.g. upholstered furniture, tents, awnings, and the like) with an aerosol spray containing micrometer or submicrometer-sized droplets of a diluted version of the fluoroacrylate emulsion. In both embodiments, the fluoroacrylate emulsion contains, dispersed therein with the aid of a surfactant system containing an amphoteric surfactant, essentially a single particulate fluoroacrylate copolymer having repeating units of the formulas I and II ##STR1## wherein R.sub.f is a fluorinated alkyl radical; R and R.sup.1 are hydrogen or alkyl; and R.sup.2 is hydrogen or substituted or unsubstituted alkyl. The aqueous dispersion further contains, in addition to the surfactant system, a minor amount of polar organic liquid. In the first embodiment, drying under heat is optional and in any event can be carried out at temperatures below 55.degree. C. In the second embodiment, drying under heat is highly impractical but is also unnecessary.

Inventors: Moody; Richard J. (Wilmington, DE)

Assignee: Moody; Ricard J.

International Classification: D06M 15/263 (20060101); D06M 23/06 (20060101); D06M 23/00 (20060101); D06M 15/277 (20060101); D06M 15/21 (20060101); B32B 035/00 (); B05D 001/18 (); B05D 003/02 ()

Expiration Date: 12/26/2013