Viscosity stable smectite clay slurries
US7258733B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Jul 17, 2003 |
| Grant date | Aug 21, 2007 |
| Priority date | — |
| Expiry date | Jul 17, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/346
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A clay slurry is described using smectite clay, water, and a defined phosphonate additive that is hydrolytically stable over time. The viscosity of the clay slurry remains pourable and relatively unchanged over time compared to prior art slurries. The slurry is useful to provide rheological control to paints and coatings and is particularly useful as an anti-bleed additive for concrete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.