Method for manufacturing a coating slip, using an acrylic thickener with a branched hydrophobic chain, and the slip obtained
US8563643B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2008 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Nov 11, 2029 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H19/56
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention consists of a method for manufacturing a paper coating slip containing a mineral material, using, as an agent for thickening the slip, a water-soluble polymer comprising at least one ethylene-unsaturated anionic monomer, and at least one ethylene-unsaturated oxyalkyl monomer terminating in a branched hydrophobic alkyl, alkaryl, arylalkyl, aryl chain, saturated or unsaturated, with 14 to 21 carbon atoms and two branches each with at least six carbon atoms. The polymer is added to the slip either directly, or during a prior stage when grinding, dispersing, or concentrating the mineral material in water, which may or not be followed by a drying stage. In this way, the water retention of the slip is improved, which contributes to a better printability of the paper coated by the slip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.