Record material using vinyl carbinol color formers
US5364830A · kind A · utility
0Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Mar 19, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C217/76
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Pressure or heat sensitive record materials with color-former sublimation problems reduced or eliminated whilst not reducing the color forming capability per unit weight of color former by providing what are in effect dimers of vinyl carbinols, with the vinyl carbinol residues, linked through the aryl groups of a diaryl amine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.