Diazotype materials which can be developed by heat and contain an activator precursor having 2-carboxy carboxamide group releasing a strong base during heating
US4584256A · kind A · utility
2Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1984 |
| Grant date | Apr 22, 1986 |
| Priority date | — |
| Expiry date | Nov 21, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/61
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to new diazotype materials of which the sensitive layer contains, as a base generator, a compound comprising a basic part and an acid part, the acid part being a 2-carboxycarboxamide group and the basic part consisting of an alkali metal cation or alkaline earth metal cation or a tetraalkylammonium cation. These diazotype materials develop rapidly and possess an excellent resistance to ageing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.