Process for improving retention in a process for the manufacture of paper, board and the like, and retaining agent for the application of this process
US5902455A · kind A · utility
5Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1997 |
| Grant date | May 11, 1999 |
| Priority date | — |
| Expiry date | May 27, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Process for improving retention during the manufacture of paper, board or the like, which consists: PA1 first of all in adding to the fibrous suspension a first retaining agent formed by a cationic polymer of high molecular weight, PA1 then, optionally in shearing the flocs obtained, PA1 and finally, in adding to the suspension a second retaining agent of inorganic nature, characterized in that the second retaining agent is a kaolin pigment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.