Cellulosic, modified lignin and cationic polymer composition and process for making improved paper or paperboard
US5567277A · kind A · utility
19Cited by
16References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1995 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Dec 4, 2015 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/455
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A composition comprising an aqueous cellulosic furnish, a high molecular weight cationic polymer, and an anionic polymer comprising a modified lignin wherein the ratio of the cationic polymer to the anionic polymer is from about 10:1 to 1:10 on an active basis is disclosed. A process employing this composition for making paper or paperboard having improved drainage, retention and formation properties is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.