Comb polymers as blocking additives for swelling clays
US12338175B2 · kind B2 · utility
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Key dates
| Filing date | Feb 7, 2024 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | Feb 7, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for inerting a swellable clay and/or for reducing or inhibiting adverse effects of swellable clays on the effectiveness of dispersants in mineral binder compositions, includes adding a comb polymer to a mineral binder composition. The comb polymer includes: at least one poly(alkylene oxide) side chain-bearing monomer unit without ionic groups, optionally at least one cationic monomer unit, optionally at least one anionic monomer unit, and optionally, at least one non-ionic monomer unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.