Composition and method for improving retention and drainage in papermaking processes by activating microparticles with a promoter-flocculant system
US8491753B2 · kind B2 · utility
0Cited by
6References
19Claims
0Family size
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Key dates
| Filing date | Jul 24, 2007 |
| Grant date | Jul 23, 2013 |
| Priority date | — |
| Expiry date | Nov 15, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2911
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A composition and method for improving retention and drainage in a papermaking process is disclosed. An unexpected synergistic effect has been observed when certain amounts of a promoter are used in conjunction with a microparticle. Optionally, a flocculent is also used to further improve the observed synergism. The microparticle includes an inorganic anionic or cationic siliceous material. The promoter includes a modified diallyl-N,N-disubstituted ammonium halide polymer. The flocculant includes one or more high molecular weight, water-soluble cationic, anionic, nonionic, zwitterionic, or amphoteric polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.