Method for improving retention and drainage characteristics in alkaline papermaking
US5532308A · kind A · utility
1Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1995 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Jan 17, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F290/046
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition and method for improving the drainage and retention characteristics of a paper furnish consisting of a water soluble graft copolymer and bentonite clay. It is preferred that the graft copolymer be added to the furnish prior to at least one shear stage and that the bentonite clay be added after the shear stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.