Silica sols, method and apparatus for producing the same and use thereof in papermaking
US9975781B2 · kind B2 · utility
0Cited by
16References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2014 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Dec 17, 2034 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to colloidal silicas having a low S-value and a high solids content, the preparation thereof, and the use thereof in the production of paper. When used in the production of paper, the colloidal silicas of the invention exhibit good retention and drainage performance so that they can be used in lower amounts compared to conventional colloidal silicas. The present invention also relates to an apparatus and a method for producing such activated colloidal silicas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.