Cationic mixed-oxide dispersion, coating pigment and ink-absorbing medium
AssigneeDegussa AG
InventorsThomas Scharfe, Christoph Batz-Sohn, Wolfgang Lortz
Life of this patent
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Abstract
A stable, aqueous dispersion, which includes: silicon dioxide mixed-oxide particles dispersed in at least one water-soluble cationic polymer having a mass average molar mass of less than 100,000 g/mol, said mixed-oxide including aluminum oxide or titanium dioxide, wherein said particles are produced by flame hydrolysis, wherein said particles have a BET specific surface area of 5 to 600 m2/g and a negative zeta potential, and wherein the dispersion has a positive zeta potential.
Claims19
A stable, aqueous dispersion, comprising:
- silicon dioxide mixed-oxide particles in form of aggregated, non-porous primary particles, comprising Si—O—Al or Si—O—Ti bonds within the primary particles, said particles being the only solid matter in the dispersion, said particles being dispersed in at least one water-soluble cationic polymer having a mass average molar mass of less than 100,000 g/mol;
- and wherein a content of said particles in the dispersion is from 30 to 50 wt. %, and the dispersion has a viscosity of less than 5000 mPas at a shear rate of 1 s−1.
A stable, aqueous dispersion, comprising:
- silicon dioxide mixed-oxide particles in form of aggregated, non-porous primary particles, comprising Si—O—Al or Si—O—Ti bonds within the primary particles, said particles being the only solid matter in the dispersion, said particles being dispersed in at least one water-soluble cationic polymer having a mass average molar mass of less than 100,000 g/mol,
- wherein said particles are produced by flame hydrolysis,
- wherein said particles have a BET specific surface area of 5 to 600 m2/g and a negative zeta potential,
- and wherein the dispersion has a positive zeta potential;
- and
- wherein a content of said particles in the dispersion is from 30 to 50 wt. %, and the dispersion has a viscosity of less than 5000 mPas at a shear rate of 1 s−1.
A stable, aqueous dispersion, comprising:
- silicon dioxide mixed-oxide particles in form of aggregated, non-porous primary particles, comprising Si—O—Al or Si—O—Ti bonds within the primary particles, said particles being the only solid matter in the dispersion, said particles being dispersed in at least one water-soluble cationic polymer having a mass average molar mass of less than 100,000 g/mol;
- and wherein a content of said particles in the dispersion is from 30 to 50 wt. %, and wherein the dispersion has a pH value of 2 to 8.
Dependencies are inferred from the claim text.