Coated fillers having silicic acid for heat-sensitive recording materials
US5401568A · kind A · utility
9Cited by
9References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1992 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Oct 6, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2993
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A particulate composition to be used as a filling material in the heat-sensitive layer of a heat-sensitive recording material is described. The material is characterized by the fact that it occurs as fine-grained white pigments which are predominantly bound to amorphous precipitated silicic acid, whereby the amorphous precipitated silicic acid either (a) is wrapped in layers around the fine-grained white pigment or (b) occurs as fine particles that are bound to the fine-grained white pigment in a punctiform manner and whereby the water content of the material (b) is 1 to 10 percent by weight, preferably 2 to 8 percent by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.