Aqueous suspensions of calcium-containing fillers
US5244542A · kind A · utility
54Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1992 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Mar 2, 2012 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/54
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is disclosed an aqueous suspension of a particulate calcium-containing filler in which the particles of filler are surface treated with a dispersing agent comprising an anionic polyelectrolyte, characterized in that said dispersing agent further comprises sufficient of a cationic polyelectrolyte to render the particles cationic. The aqueous suspension is useful in the manufacture of paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.