Patents Update
Binding agents for rad-cured aqueous paints
Patent No. U.S. 7,728,054 B2
Cytec Surface Specialties Austria
GmbH has been granted a patent for
binders for radiation-curable water-based paints, comprised of reaction
products ABCDE of epoxy compounds A having at least two epoxide
groups per molecule, unsaturated
fatty acids B, olefinically unsaturated monomers C, unsaturated
aliphatic compounds containing
hydroxyl groups, D, and polyfunc-tional isocyanates E, characterized
in that the compounds A are bonded
to the compounds B by a beta-hydroxyester bond and the compounds C at least partially form
grafts on the adducts AB to give compounds ABC, in that the compounds
D are bonded to the compounds E by
a urethane group to give semicapped
isocyanates DE, and in that the compounds ABC are bonded to the compounds DE, likewise with urethane
formation, wherein a mass fraction
of at least 10% of the monomers C is
an olefinically unsaturated acid.
CIBA PATENTS METHOD OF
COLORING A COATING
Patent No. U.S. 7,727,702 B2
Ciba Specialty Chemicals Corp.
has been granted a patent for a
method of irreversibly coloring a
coating composition containing a
color former comprised of the steps of
a) providing a coating composition
that contains a thermosetting resin
with the proviso that the coating
composition contains no developer
nor any additive which may function
as developer; b) mixing the coating
composition with the color former
whereby no color is formed; c) apply-
ing the colorless composition
obtained in step b) to a substrate; d)
in case of a thermosetting resin other
than an alkyd resin curing the resin
between 100˚ and 300° C whereby no
color is formed, and in case of alkyd
resin drying of the resin at room
temperature, whereby no color is
formed; e) exposure to UV or high
energy radiation below 400nm
whereby the color is formed.
BAYER MATERIALSCIENCE
PATENTS COATING COMPOSITIONS
Patent No. U.S. 7,728,076 B2
Bayer MaterialScience AG has
been granted a patent for a coating
composition comprised of A) a polyol
component consisting of a) from 5%
to 40% weight of one or more aliphatic oligocarbonate polyols having a
number-average molecular weight
Mn of from 200 to 5,000 g/mol, b)
from 20% to 60% weight of one or
more oligoester polyols having a
number-average molecular weight of
from 200 to 5,000 g/mol, and c) from
20% to 70% weight of one or more
hydroxy-functional polyacrylate
polyols, the amounts of a), b) and c)
totaling 100% weight, and B) one or
more polyisocyanate crosslinkers
that are reactive towards OH groups
and have a mean NCO functionality
of >2.0.
PROCESS FOR THE PRODUCTION
OR COATING OF GRANULES
Patent No. U.S. 7,732,008 B2
Evonik Degussa has been granted
a patent for a process for the produc-
tion or coating of granules in a flu-
idized bed, comprised of heating a
fluidized-bed gas to produce the flu-
idized bed, wherein the fluidized-bed
gas comprises an inert gas that does
not form an explosive mixture with
constituents of the liquid medium;
applying a liquid medium comprising
a granule-forming or coating-forming
compound, or at least one reaction
component therefore, by spraying
particles located in the fluidized bed
and at a same time vaporizing an
organic solvent comprised in the liq-
uid medium, the particles having a
smaller mean diameter than that of
particles to be produced, wherein an
amount of inert gas is reduced dur-
ing operation and replaced by a
superheated vapor of the organic sol-
vent; partially condensating an
organic solvent from at least a por-
tion of a fluidized-bed waste gas
leaving the fluidized bed; and re-
heating the fluidized-bed gas leaving
the condensation device and reintro-
ducing the re-heated gas into the flu-
idized bed.
METHOD FOR MANUFACTURING
PIGMENT DISPERSION
Patent No. U.S. 7,727,325 B2
Canon Kabushiki Kaisha has
received a patent for a method for manufacturing a pigment dispersion, the
method is comprised of mixing a
solution in which a pigment is dissolved in an acid, and a reaction liquid that decreases a solubility of the
pigment in the solution, in the presence of a dispersant for the pigment,
and causing the pigment to precipitate, wherein the solution and the
reaction liquid are mixed in the presence of the dispersant and a cyclic
carbonate.
USE OF NANOPARTICULATE ORGANIC
PIGMENTS IN PAINTS AND COATINGS
Patent No. U.S. 7,727,625 B2
PPG Industries has been granted
a patent for a flake assemblage comprised of a plurality of scattering
members encapsulated in a resinous
polymer, wherein a difference in
refractive index between the scattering members and the polymer is
greater than about 0.1 and assemblage has an aspect ratio of about 2
to about 250; wherein the scattering
members are not comprised of composite materials. CW
