Composition and process for imparting durable repellency to substrates
AssigneeMinnesota Mining and Manufacturing Company
InventorsLori P. Engle, Steven J. Hamrock, Mark J. Pellerite
Life of this patent
Estimating the term…
Abstract
A fluorochemical treatment composition comprises (a) a sol comprising a colloidal dispersion of substantially discrete, substantially monodisperse in size, polymer-grafted, inorganic microparticles in liquid; and (b) at least one fluorochemical. The composition can be used to impart durable water and oil repellency, stain release, and dry soil resistance to a variety of substrates.
Claims30
A fluorochemical treatment composition comprising (a) a sol comprising a colloidal dispersion of substantially discrete, substantially monodisperse in size, polymer-grafted, inorganic microparticles in liquid;
- and (b) at least one fluorochemical, wherein said polymer-grafted, inorganic microparticles have been prepared by the polymer grafting of preformed, inorganic microparticles.
A treatment composition comprising a sol comprising a colloidal dispersion of substantially discrete, substantially monodisperse in size, polymer-grafted, inorganic microparticles in liquid;
- wherein said polymer-grafted, inorganic microparticles have been prepared by the polymer grafting of preformed, inorganic microparticles.
A treatment composition comprising a sol comprising a colloidal dispersion of substantially discrete, substantially monodisperse in size, polymer-grafted, silica microparticles in water, wherein said polymer-grafted, silica microparticles have been prepared by the grafting of preformed, silica microparticles with polymer comprising polymerized units of at least one monomer selected from the group consisting of methacrylic acid and fluorochemical-containing acrylates.
A process for imparting durable water and oil repellency, stain release, and dry soil resistance properties to a substrate comprising the steps of (a) contacting a substrate with a sol comprising a colloidal dispersion of substantially discrete, substantially monodisperse in size, polymer-grafted, inorganic microparticles in liquid;
- and (b) contacting said substrate with at least one fluorochemical;
- wherein said polymer-grafted, inorganic microparticles have been prepared by the polymer grafting of preformed, inorganic microparticles.
Dependencies are inferred from the claim text.