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US 8,728,223 B2Granted
Low viscosity, high particulate loading dispersions
AssigneeCabot Corporation
InventorsAnne K. Shim, Eugene N. Step, Agathagelos Kyrlidis, Lang Nyugen
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Abstract
The present invention relates to dispersions comprising particulate materials and a solvent, with an optional dispersant. The solvent has a low dielectric constant, and the particulate material is present at high loading levels. The resulting dispersion has been found to be stable and have a low viscosity, even at high particulate material loadings. Various uses for these dispersions are also disclosed.
Claims37
A dispersion comprising, a particulate material, a dispersant, and a solvent, wherein
- a) the solvent has a dielectric constant of ≦50;
- b) the dispersion is a stable dispersion having a viscosity of ≦50 cP;
- and
- c) the particulate material is present in an amount of ≧10% by weight based on the total weight of the dispersion, and wherein
- i) the particulate material is a modified pigment comprising a pigment having attached at least one anionic or anionizable group and the dispersant comprises at least one cationic or cationizable group;
- ii) the particulate material is a modified pigment comprising a pigment having attached at least one cationic or cationizable group and the dispersant comprises at least one anionic or anionizable group;
- or
- iii) the particulate material is a modified pigment comprising a pigment having attached at least one anionic or anionizable group and the dispersant comprises at least one anionic or anionizable group.
5 more elements
A dispersion comprising a particulate material and a solvent, wherein
- a) the particulate material is present in an amount of ≧25% by weight based on the total weight of the dispersion;
- b) the solvent has a dielectric constant of ≦50;
- and
- c) the dispersion is a stable dispersion having a viscosity of ≦50 cP.
1 more element
Dependencies are inferred from the claim text.