Thermally-responsive record material
US4870047A · kind A · utility
7Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1988 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Sep 1, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/913
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A novel thermally-responsive record material is disclosed which is resistant to image fade from one or more common external challenges including contact with common fats or oils, skin oil, carbonless solvents, plasticizers or high heat and humidity, such as in a 90.degree.F./90% humidity test. The heat-sensitive material of the invention contains a fade resistance imparting ascorbic acid ester of the formula ##STR1## where R.sup.1 is hydrogen or a straight chain or branched chain acyl group of from 9 to 22 carbons inclusive, PA0 wherein R.sup.2 is a straight chain or branched chain alkyl group of from 8 to 21 carbons inclusive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.