- Diazo refers to a type
of organic compound that has two linked nitrogen (azo) compounds.
- The general formula is
R2C=N2. The simplest example of a diazo compound is diazomethane.
- The electronic
structure of diazo compounds involves a positive charge on the central
nitrogen and negative charge distributed between the terminal nitrogen
and the carbon.
- Diazo compounds are not
dyes, but dye precursors. Some azo dyes are manufactured by coupling a
phenol or naphthol to a diazonium compound.
- The TiCl4-mediated
reaction of esters with benzoyl chloride gave α-benzoylated esters in
high yields. Diazo transfer of the α-benzoylated esters utilizing
p-acetoamidobenzenesulfonyl azide afforded α-diazo esters in good
yields. This procedure allows the preparation of α-diazo esters in gram
quantities.
- Diazo production uses
aqueous ammonia to destroy the stabilizer incorporated in the material,
in turn enabling the dyes to couple with the diazonium salts.
- The techniques employed
in the production of diazo sensitised copying materials comprise:
unwinding a reel of the base material; applying the appropriate chemical
solutions in a coating machine; removing any excess solution while the
material is passing through the machine;
drying the coated materials
in ovens which form part of the machine; re-reeling the dry coated
material; converting the coated reel into rolls or sheets.
- The combination of a
new high-speed process and developer unit which uses pressurized
anhydrous ammonia gas offers a significant increase in the speed of
developing diazo photomaterials.
- Diazo compounds are
used as precursors to carbenes, which are generated by thermolysis or
photolysis.
- Water-soluble
multifunctional diazo compounds are primarily used as photosensitive
agents for use in screen printing plates and colored image formation
material (e.g. color proof films), whereas organic solvent-soluble diazo
compounds are often used for lithographic printing plates.
- Improved
photosensitivity to light in the mid UV range can be achieved using
diazo esters of 4-benzyl-1,2,3-trihydroxybenzene. These esters show
surprising solubility in some novolak resin/solvent systems.
- Today, the majority of
lithographic plates are made of aluminum sheets of varying thickness
(usually between .008" and .0015") with a surface grain or granular
finish. This grain serves to give water-carrying properties to the plate
and to give anchorage to the image forming material.
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General
- About diazo
compounds
- Basic information about
diazo
- Diazo compounds
Process
- Reagents for
Phototherapy: Design of Transition Metal Diazo Compounds
- Pressurized High-speed
Development of Diazo Films
- An Efficient and Mild
Preparation of Vinyl Diazo Carbonyl Compounds
- Production of diazo
copying materials
- The diazo reactions of
histidine and tyrosine
-
Preparation of
2-diazo-2-oxopiperidin-3-yl-3-oxopropanoates
- Process Control of the
Chlorobenzene Single-Step Liftoff Process with a Diazo-Type
Resist
- Simple Preparation of
α-Diazo Esters
- Unusual reaction of
b-hydroxy a-diazo carbonyl compounds
- The Diazo Printing Process
- Wolff rearrangement of
diazo ketones derived from N-p-tolylsulfonyl protected
amino acids
Company
Profiles
- Company from
China
- Company from Sweden
- Company from United
Kingdom
- Another company from
China
- Another company from
China
Patent &
Technology
- Method of manufacturing
a matrix for cathode-ray tube
- Diazo derivatives and
process for their preparation
- Diazo pigments
- Process for the
preparation of highly coloured diazo pigment mixtures
- Stabilized aqueous
diazo solutions
- Diazo-coupling
option with pyrochrome chromogenic lal
- The new Generation of
Diazo Photo Tools
- Offset plate
technology
Functions
- Studies on Synthesis
and Dyeing Preformance of Acid Dyes Based on
4,7-Dihydroxy-3,8-di-a-naphthylazo- 1,10-phenanthroline-2,9-dione
- The diazo ketone
approach to the isoprostanes
- Preparation and
Characterization of Fulleroid and Methanofullerene Derivatives
- Flash Photolysis of
10-Diazo-9(10H)-phenanthrenone in Aqueous Solution
- Reactivity and
Reaction Mechanism for Reactions of 1,1(Azodicarbonyl) dipiperidine with
Triphenylphosphines
- Synthesis and
Antimicrobial Evaluation of 3-Hydrazino- Naphthoquinones as Analogs of
Lapachol
- Di- and Tetrafunctional
Reactive Red Dyes
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Material safety data sheet
- Safety data for
6-diazo-5,6-dihydro-5-oxo-1-naphthalenesulfonyl chloride
- Diazo Reagent
- Diazo Sensitizer
- Diazo photo
Emulsion
- Safety data for
3-diazo-3,4-dihydro-4-oxo-1-naphthalenesulfonyl chloride
- Diazo blue B
- Safety data sheet for
Diazo Sensitizer
- Standard diazo sensitizer
Project and
Consultants
- Diazo Prints and
Technology
- Enantioselective synthesis of 3-arylindan-1-ones
by intra molecular c-h insertion reactions of diazo ketoesters catalyzed
by chiral dirhodium carboxylates
- Consultant from USA
- Consultant from Minnesota
- Consultant from Poland
Product &
Applications
- Diazo developer
dd460
- Diazo YELLOW GC
- Diazoresins and
photopolymers
- Dirasol
Diazo-Photopolymer Emulsions
- Norikop 8
HR-Water and Solvent Resistant Diazo-Sensitized UV Polymer
Emulsion
- KIWOCOL Poly-Plus
Diazo-Photopolymer
- Dupont image
master diazo imd-xt
- New light-sensitive
positive working thick resist materials for various electronic
applications
Market &
Report
-
Integrated and sequential
anaerobic/aerobic biodegradation of azo dyes
Azo dyes briefing
note
Company report
About azo dye
Publication on demand technical possibilities and limitations
Developments
Toward the Synthesis of the Welwitindolinone Alkaloids
Diazo Copying
Materials
Development of the
United Kingdom diazo copying materials industry and market
Eco-friendlier Process
Introduced For Next-Generation DuratoolŽ EclipseŽ Diazo Phototool
Films
Suppliers &
Turnkey providers
- Diazo suppliers
- Diazo resin
suppliers
- Diazo
manufacturers
- Turnkey provider from
Pennsylvania
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