Low pH coating composition for ink jet recording medium and method
US6129785A · kind A · utility
27Cited by
45References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1997 |
| Grant date | Oct 10, 2000 |
| Priority date | — |
| Expiry date | Jun 13, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/5254
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A coating composition for an ink jet recording medium comprises an aqueous suspension of absorptive silica pigment, a polyvinyl alcohol binder, and a cationic fixing agent. The composition is dispersed at pH values in the range of 4.0 to 7.0. The pigment is preferably a mixture of 75% or more silica gel having a pore volume of 0.5-1.5 cc/g, and 10% or more alumina or alumina hydrate. A method for making down the coating composition and applying it to a substrate is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.