- 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.
|
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
|
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 Duratool® Eclipse® Diazo Phototool
Films
Suppliers &
Turnkey providers
- Diazo suppliers
- Diazo resin
suppliers
- Diazo
manufacturers
- Turnkey provider from
Pennsylvania
Order
the CD ROM Today |