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US 11,987,501 B2Granted
Aqueous hydrophobic silica dispersions
AssigneeCabot Corporation
InventorsLang H. Nguyen, Kavita K. Pai, Steven Jacobs, Tianqi Liu, Melissa J. Monello, Angelica M. Sanchez Garcia, Zhangliang Gui, Takashi Umehara
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Abstract
An aqueous hydrophobic silica dispersion includes a hydrophilic particulate silica, a hydrophobic particulate silica having a methanol number of at least 60, and a dispersant having at least one cationic or cationizable group and an HLB ratio of 2 to 20.
Claims20
An aqueous hydrophobic silica dispersion comprising a mixture of:
- an aqueous base dispersion comprising at least 5 wt % of a hydrophilic particulate silica selected from the group consisting of fumed silica, colloidal silica, and precipitated silica;
- hydrophobic silica comprising a particulate silica selected from the group consisting of fumed silica, colloidal silica, silica aerogel, and precipitated silica, the hydrophobic silica having a methanol number of at least 60;
- and
- a dispersant having at least one cationic or cationizable group and an HLB ratio of 2 to 20,
- wherein the total amount of particulate silica in the dispersion is at least 15% by weight.
2 more elements
Dependencies are inferred from the claim text.