PPG patents epoxy functional polymers
Patent No. U.S. 7,776,960 B2
PPG Industries has obtained a patent for an
epoxy functional polymer comprised of the
reaction product of a terpene and an epoxy
functional monomer wherein the terpene is
comprised of 10% to 60% weight of the
total solids weight of the polymer.
has received a patent for paint on a sur-
face that warns of radiological or chemi-
cal substances comprised of a paint
operatively connected to the surface, an
indicator material carried by the paint
that provides an indication of the radio-
logical or chemical substances, wherein
the indicator material includes scintilla-
tion material, and a thermo-activation
material carried by the paint.
Reactive Surfaces extends its
novel biocide technology
patent portfolio in the U.S.
and abroad
Reactive Surfaces has expanded its existing active ingredient patent portfolio on
ProteCoat bio-based anti-microbial additive technology with grants in the U.S. and
Australia of several patents covering coating compositions containing these non-toxic biocides. The issued claims vary in
scope depending upon the jurisdiction,
but generally relate to coating compositions comprising one or more antimicrobial peptides in a coating such as a paint,
and include multi-layer resin systems as
well as temporary coatings. The claimed
coating compositions include architectural
coatings (wood and masonry coatings),
industrial coatings (automotive, can,
sealant and marine coatings), as well as
specification coatings (pipeline, traffic
marker, aircraft and nuclear power plant
coatings). More specifically, the claimed
compositions comprise antimicrobial peptides (with both antifungal and antibacterial functionalities, as well as the
capability to kill spore forms of both) in a
sufficient amount to inhibit or prevent the
growth of a microbe on a coated surface.
The claimed biocides are naturally occurring, non-toxic and readily biodegrade-able amino acid polymers generally
comprising six to 25 amino acids capable
of being admixed into a binder, including
thermoplastic and thermosetting binders.
Paint for detection of
radiological or chemical agents
Patent No. U.S. 7,780,912 B2
Lawrence Livermore National Security
Hydrophobic coatings patent awarded
Patent No. U.S. 7,670,684
Corrosion-resistant, more environmentally acceptable coatings have been realized by Sergiu Gorun, PhD, associate professor of chemistry at New Jersey Institute of Technology (NJIT). The "Functional Coating Compositions of
Perfluoroalkyl Perfluoro-Phthalocyanine Compounds" discloses a new self-contained subclass of molecules. These new materials are comprised of organic
scaffolds with metal centers, which can be applied as either an opaque or transparent hydrophobic coating. "A combination of properties has been achieved
based on the presence of a metal in the molecular structure without compromising the desired robust, hydrophobic features," Gorun said. "Consequently,
these coatings are more versatile than previous materials since most metals can
be incorporated." The new composition avoids exposing humans to the cancerous effects of heated petroleum-based products, which may make the new
compositions more environmentally acceptable than current well-known coatings. Since all carbon-hydrogen bonds have been eliminated and replaced by
perfluorinated carbon chains or fluorine, the new molecules exhibit a high thermal stability as compared to petroleum-derived materials. The coatings work by
maintaining a low-energy surface that resembles a lotus leaf in its property to
repel water, despite the presence of metal centers. Since water does not wet the
surface, any exposed area covered by the coating will not be subject to water
binding, thus preventing the onset of corrosion. This new chemical configuration also mitigates the destructive effect of oxygen, the culprit that ages organic
materials. The absence of any carbon-hydrogen bonds in NJIT's new coating removes the pathway for oxygen to destroy the new molecules. Interestingly, the
use of certain metals in the center of the composition enables the coatings to
use the sun's radiation for the photo-physical activation of oxygen from air. Activated or singlet oxygen is good for maintaining a clean surface. It won't destroy the robust coating, thus contributing to its overall protective effects. The
potential applications for these new materials are broad. U.S. Army researchers
are interested in these coatings for military and commercial applications: preventing the corrosion of vehicles and related hardware as well as applying the
coatings to surfaces as a self-cleaning repellent for chemical and biological contaminants. On-going collaborative research is focused on using the materials as
biocidal coatings for medical instruments or hospital walls or as an optical coating that allows surfaces to change color under the influence of electrical
currents. One industrial application includes the photocatalytic oxygenation
of molecules.
22 | Coatings World
www.coatingsworld.com
March 2011