Coating composition comprising colloidal silica and glossy ink jet recording sheets prepared therefrom
US6893691B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2003 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Apr 29, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/5218
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A coating composition comprising a relatively low alkali-containing colloidal silica and glossy ink jet recording sheets prepared from such coatings is described. The coating comprises binder and colloidal silica, e.g., having an average particle size in the range of about 1 to about 300 nanometers. The low alkali colloidal silica of this invention comprises ammonia, polydispersed colloidal silica, or both. Polydispersed silicas having a particle size distribution such that the median particle size is in the range of 15 to 100 nanometers and 80% of the particles span a range of at least about 30 to about 70 nanometers are preferred. It has been discovered that coatings prepared from such colloidal silica and applied to conventional ink jet recording sheet supports have a specular gloss of at least 30 at 60° C., and excellent printability at silica solids to binder solids ratio of 1:1 or greater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.