Precipitated calcium carbonate pigment, especially for use in inkjet printing paper coatings
US8936771B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2006 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Mar 25, 2029 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H19/385
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to novel and innovative PCC pigments, able to be used in a paper coating formulations to manufacture coated “multipurpose” papers, in particular for inkjet applications, whose print qualities would be identical or quite similar to high resolution commercial papers, while maintaining a reduced paper manufacturing and production cost. Said pigments are obtained by a carbonation process using a reduced flow rate of CO2/air, which leads to porous agglomerates of PCC of a very specific structure and unique properties, followed by an upconcentration step leading to substantially the same agglomerates but with a higher, appropriate, solids content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.