Method of improving retention and drainage in a papermaking process using low molecular weight cationic dispersion polymers
US6517677B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2002 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Jan 4, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/001
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
This invention is directed to a method of improving retention and drainage performance in a papermaking process comprising adding to the furnish an effective amount of a low molecular weight water-soluble cationic dispersion polymer prepared by polymerizing one or more cationic monomers and one or more nonionic monomers and one or more chain transfer agents under free radical forming conditions in an aqueous solution of an anionic salt in the presence of a stabilizer polymer, wherein the cationic dispersion has a cationic charge of from about 10 mole percent to about 80 mole percent and an RSV of from about 0.2 dl/g to about 6 dl/g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.