Process for rapidly immobilizing paper coating compositions
US5093159A · kind A · utility
5Cited by
16References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1989 |
| Grant date | Mar 3, 1992 |
| Priority date | — |
| Expiry date | Nov 6, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H19/54
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Rapidly immobilizing paper coating compositions may be prepared by formulating an aqueous coating composition comprising a cationic starch, pigment and sufficient base to obtain a pH above the pK of the starch derivative so that the starch is no longer cationic; coating the paper substrate; and lowering the pH of the coating such that the starch becomes cationic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.