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RadTech
UV/EB Technology Conference & Expo 2008
May 4-7, 2008
Lakeside Center at McCormick Place
Chicago, Illinois - United States of America
RAW MATERIALS
Advances in the Chemistry
of Melamine Acrylate Oligomers
Ahmet Nebioglu, Bomar Specialties
Abstract:
Melamine resins are well known in the industry. We have prepared various
very fast UV-curing melamine acrylates at low photoinitiator levels.
A light-sensitive melamine acrylate was prepared also: it demonstrates
very low leaching of low MW compounds from cured films. We have synthesized
five new oligomers through Michael addition of thiols to melamine
acrylates. The most important property of the new sulfur containing
oligomers is their high refractive index. These oligomers find application
in antireflective coatings.
Liquid
UV Curable Cyclohexanedimethanol Diacrylate Monomers
based on UNOXOL™ Diol
Kiran K. Baikerikar, The Dow Chemical
Company
Abstract: UNOXOL™ Diol is a liquid cycloaliphatic diol
based on a unique composition of (cis,trans)-1,3- and (cis,trans)-1,4-cyclohexanedimethanol
and can be used to prepare diacrylate monomers for use in ultraviolet
(UV) cured coatings, inks, and adhesives. As a result of this unique
diol composition, diacrylate monomers prepared from UNOXOL™
Diol with trans-1,4-cyclohexanedimethanol content less than 15%,
are also liquid at room temperature and are readily soluble in other
acrylate monomers and oligomers (in contrast to known diacrylates
prepared from 1,4-cyclohexanedimethanol, which are solid). More
importantly, UV cured coatings based on (cis,trans)-1,3- and (cis,trans)-1,4-cyclohexane
dimethanol diacrylates prepared from UNOXOL™ Diol show superior
hardness, scratch resistance, and chemical resistance, compared
to common diacrylate monomers used in the UV coating industry, such
as hexanediol diacrylate, tripropylene glycol diacrylate, dipropylene
glycol diacrylate, and propoxylated neopentyl glycol diacrylate.
Thus, this new monomer appears promising for enhancing the performance
of radiation cured coatings, inks, and adhesives applied on a variety
of substrates, including plastic, paper, wood, metal, and glass.
This work will summarize the properties of UV cured coatings based
on (cis,trans)-1,3- and (cis,trans)-1,4-cyclohexane dimethanol diacrylates
prepared from UNOXOL™ Diol. ™ Trademark of The Dow Chemical
Company ("Dow") or an Affiliate of Dow.
Photopolymerization
of New Vinyl Ester Monomers
Huanyu Wei, University of Southern Mississippi
Abstract: Vinyl esters including divinyl fumarate and ethyl
vinyl fumarate, which contain two different conjugated reactive
groups, are new unique monomers and have great potential in formulating
UV curable systems. The copolymerization kinetic of these vinyl
esters with acrylates was studied by using real time Infrared. We
also report on their characterization by using techniques including
UV-vis, Cyclic Voltammetry and theoretical calculations.
Raw
Materials for UV/EB Laminating Inks
James Goodrich, Sartomer Company, Inc.
Abstract: UV/EB inks are continually pushing into new application
areas. One of the most vital new areas for UV/EB inks is flexible
packaging, which is currently dominated by water and solvent-based
inks. UV/EB technology has traditionally not been universally adopted
in this area due to chemistry constraints, including odor, extractables,
lamination capability and general printability. The ability to laminate
UV/EB inks with current and emerging adhesive technology is especially
a challenge to formulators and converters. The paper will examine
various UV/EB chemistries that can be used for printing flexible
packaging via lithographic or flexographic printing processes. The
film adhesion and lamination properties of different chemistries
will be highlighted and linked to their performance in UV/EB flexible
packaging applications.
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