Process for the production of a pigment-based agent suitable for the paper and board industry and improving the printability of paper and board
US4963192A · kind A · utility
9Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 27, 1988 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Jan 27, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a process for the production of an agent suitable for the paper and board industry and improving the printability of paper and board, wherein an aqueous colloidal system is prepared from at least one pigment and at least one water-soluble or water-swellable hydrogel containing anionic groups, said system is subjected to coacervation by means of a quarternary organic ammonium salt and, if appropriate, the product obtained in the coacervation is concentrated by sedimentation, centrifuging and/or filter-pressing, to the agent produced and to the use thereof in the paper and board industry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.