Patent · US Expired

Stable, pumpable aqueous suspensions of precipitated silica particulates

US5234493A · kind A · utility

6Cited by
6References
30Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 24, 1992
Grant dateAug 10, 1993
Priority date—
Expiry dateApr 24, 2012

Classification

  • Technology area (CPC D)Textiles; Paper
  • CPC primaryD21H19/40
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

Stable, non-gelling and pumpable aqueous suspensions of precipitated silica particulates, well adapted for the coating of paper and cardboard substrates, include an effective stabilizing amount of at least one biogum heteropolysaccharide and at least one quaternary ammonium, sulfonium or phosphonium compound (cationic surfactant).

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