Browse Prior Art Database

Imines as Diazotype Developing Agents

IP.com Disclosure Number: IPCOM000093745D
Original Publication Date: 1966-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Halperin, BI: AUTHOR [+2]

Abstract

This pertains to the development of diazotype materials and particularly to the use of imines as developing agents. Development of diazotype materials with ammonia and caustic solutions containing coupling components is well known. Each has its limitations. Ammonia development requires venting but has the ability to function on materials which are multicolored. A caustic solution is limited to single colors and causes degradation of the carrier. Both are relatively ineffective for penetrating hydrophobic carriers because of their inorganic aqueous nature.

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Imines as Diazotype Developing Agents

This pertains to the development of diazotype materials and particularly to the use of imines as developing agents. Development of diazotype materials with ammonia and caustic solutions containing coupling components is well known. Each has its limitations. Ammonia development requires venting but has the ability to function on materials which are multicolored. A caustic solution is limited to single colors and causes degradation of the carrier. Both are relatively ineffective for penetrating hydrophobic carriers because of their inorganic aqueous nature.

The imines can be utilized as the developing agent for either one or two component diazotype papers and films. In the case of papers not only does it cause rapid development but it also undergoes polymerization when contacting acid. Thus the strength of the paper is increased rather than decreased as is the usual situation. In addition, such polymerization causes the base material to become hydrophobic so that the image is water fast.

As concerns transparent organic carriers of diazotype materials these are organic in nature and as such require special treatment i.e. saponification or other treatment to render their surfaces water wettable. Now, with the use of imines this is no longer a requirement. Since the imines are organic in nature they tend to penetrate organic films rapidly to cause the development of the azo dye.

Example I - Ethyleneimine is placed in a DeVelbiss n...