Cationic pigment-containing paper coating composition
US5384013A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1992 |
| Grant date | Jan 24, 1995 |
| Priority date | — |
| Expiry date | Jun 4, 2012 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H19/56
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is disclosed an aqueous paper coating composition which comprises at least 45% by weight of a particulate pigment dispersed with a dispersing agent, and an adhesive; characterized in that said dispersing agent comprises an anionic polyelectrolyte and a cationic polyelectrolyte, the cationic polyelectrolyte being present in an amount sufficient to render the particles cationic, in that said adhesive is a cationic or non-ionic adhesive and in that said particulate pigment is one which is not capable of being dispersed in water at high solids, and following vigorous mixing, in the sole presence of said cationic polyelectrolyte. Also disclosed is a method for making the paper coating composition, a method for coating a paper with a paper coating composition and the resulting coated paper. The coated paper of the invention is particularly suited to recycling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.