Use of dispersions of crosslinked cationic starch in papermaking
US7160420B2 · kind B2 · utility
17Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2001 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Oct 26, 2021 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/18
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Starch dispersions comprising discrete particles of crosslinked cationic starch in an aqueous liquid can be used in papermaking. They can be used as a wet-end additive or in surface coating. The starch dispersions can be prepared by a process comprising: (a) obtaining a mixture of cationic starch and an aqueous liquid, (b) processing the mixture using shear forces in the presence of a crosslinker: and (c) adding and mixing in a hydroxylic liquid to obtain the starch dispersions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.