New Diazo Process
Abstract
This project was initiated to explore diazo type compound with spectral response at 520 nm, and stability at ambient storage conditions. Such compounds would permit the direct copying of blue prints and result in major time and dollar savings to blueprint users including federal and municipal government agencies, the military, large and small industries and the construction industry. The photochemical sensitivity of the aromatic diazonium salts used in conventional diazo copying systems is limited to a narrow spectral region in the near ultraviolet and the blue, with maximum sensitivity from 375 nm to 400 nm. A new category of diazonium compound, with light sensitivity in the visible spectrum from 500 - 540 nm has been the goal of this project. There were four compounds picked to explore: 7-N,N-dimethylamino-2-fluorene diazonium chloride; 6-N,N-dimethylamino-1-pyrene diazonium chloride; 7-N,N-dimethylamino- 2-pyrene diazonium chloride; and 7-N,N-dimethylamino-3-dibenzopyran diazonium chloride. These four compounds did not produce the required results Naphthalene diazonium compounds meet the criteria specified for compounds to be investigated. Both 5-dimethylamino-1-napthalene diazonium chloride and 6- dimethylamino-2-naphthalene diazonium chloride possess the relatively long electrically conductive paths between appended polar nitrogens.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 02, 1985
- Accession Number
- ADA161962
Entities
People
- Sidney K. Tally