Filler for ink jet recording paper
US4892591A · kind A · utility
13Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1988 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Jun 3, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a filler for ink jet recording paper, said filler being composed of amorphous silica particles having a median diameter, measured by the coulter counter method, of 2 to 15 .mu.m, an oil absorption of at least 180 ml/100 g, a refractive index, measured by the solvent method, of at least 1.450, and a moisture absorption, measured when it is caused to absorb moisture for 200 hours at a relative humidity of 90% and a temperature of 25.degree. C., of at least 35%, and a coating of a compound of a metal of Group II of the periodic table on the surface of the silica particles in an amount of 0.5 to 20% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.