Papermaking process utilizing hydrophilic dispersion polymers of diallyldimethyl ammonium chloride and acrylamide as retention and drainage aids
US6071379A · kind A · utility
27Cited by
11References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1998 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Jan 21, 2018 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/66
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for improving retention and drainage performance in a papermaking process is disclosed. The method comprises forming an aqueous cellulosic papermaking slurry, adding an effective amount of a hydrophilic dispersion polymer to the slurry, draining the slurry to form a sheet and drying the sheet. The hydrophilic dispersion polymer is preferably a copolymer of diallyldimethyl ammonium chloride and acrylamide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.