Cationically surface-modified hydrophilic non-crosslinked homo- or co-polymer nanoparticles are used as an aqueous dispersion in stain-release treatment of textile or non-textile surfaces

摘要

Cationically surface-modified hydrophilic non-crosslinked homo or co-polymer nanoparticles are claimed, as is also stain-release treatment of textile or non-textile surfaces using aqueous dispersions of the particles. INDEPENDENT CLAMS are included for: (1) cationically-modified hydrophilic non-crosslinked polymer nanoparticles of size 10 nm to 2 microns which are surface-coated with cationic polymers, polyvalent metal ions or cationic surfactants, the crosslinked polymer comprising (by wt.) (a) carboxyl group-containing ethylenically-unsaturated monomers or salts (60-100%); (b) water-insoluble mono- ethylenically-unsaturated monomers (0-40%); (c) sulfonic- and/or phosphonic-acid-containing monomers (0-25%); and (d) water-soluble nonionic monomers (0-30%); (2) aqueous dispersions of such particles, the dispersions being stabilized with anionic, nonionic and/or betaine-type surfactants and/or protective colloids; and (3) stain-releasing treatment of textile or non-textile surfaces using the dispersions.