Substantially water-insoluble cationized solids, and their preparation and use
US6184302A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 1998 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | May 11, 2018 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/44
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to water-insoluble cationized solids obtained by treating solids with cationic homopolymers and/or copolymers comprising allylic and/or vinylic double bonds, where cationization is carried out using nitrogen-containing cationic polymers and/or copolymers which comprise from 0.5 to 100 mol-%, preferably from 5 to 20 mol-%, of said double bonds, based on nitrogen equivalents. The invention relates in particular to cationized solids obtained by cationization with allylated and/or vinylated derivatives of amino-containing polymers and/or copolymers. The invention also embraces the preparation of cationized solids by free-radical crosslinking of the abovementioned cationic polymers and/or copolymers in the presence of solids. The products obtained are in general at least 95% insoluble in water. They are obtained by cationizing mineral materials and, preferably, cellulose and are used preferably as retention aids and/or fixing agents in papermaking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.