Method for improving retention and drainage characteristics in alkaline papermaking
US5415740A · kind A · utility
11Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1994 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Mar 24, 2014 |
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.