Patent · US Active

Comb polymers as blocking additives for swelling clays

US12017957B2 · kind B2 · utility

0Cited by
2References
8Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 18, 2022
Grant dateJun 25, 2024
Priority date
Expiry dateNov 18, 2042

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02W30/91
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

A method includes adding (i) a comb polymer and (ii) a plasticizer to a mineral binder composition comprising swellable clays. 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, wherein a molar ratio of the cationic monomer units to the side chain-bearing monomer units is equal to or less than 10, a molar ratio of the anionic monomer units to the side chain-bearing monomer units is less than 1, and a molar ratio of the non-ionic monomer units to the side chain-bearing monomer units is less than 5.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.