PPG Industries patents waterborne coating
U.S. 8,143,348 B2
PPG Industries has been granted a patent
for a coating composition comprised of a
continuous phase comprised of water and
a dispersed phase comprised of a micro-gel having a mean particle size of greater
than 50 nanometers to 900 nanometers
and formed from reactants comprised of
no more than 5% by weight, based on the
total weight of the reactants, of a multi-ethylenically unsaturated compound, and
a plurality of monoethylenically unsaturated compounds selected so as to provide
a copolymer having a calculated Tg of
greater than 100° C and comprised of a
cycloaliphatic (meth)acrylate.
Henkel patents corrosion
protection agent for coating
metallic substrates
U.S. 8,142,897 B2
Henkel KGaA has received a patent for a
chromium-free, curable corrosion protection agent for the first coating of
metallic substrates. The corrosion protection agent has a pH in the range of
from 1 to 3 and containing water and
components: fluoro complex ions of titanium and/or zirconium, at least one
corrosion protection pigment, at least
one organic polymer or copolymer
which is water-soluble or water-dis-persible in the specified pH range and
which as such in aqueous solution in a
concentration of 50% weight and has a
pH in a range from 1 to 3, an at least one
polyvinyl amine comprised of amino
groups that are acylated, the polyvinyl
amine has a molecular weight of greater
than 100,000 g/mol but not greater than
1,000,000 g/mol and a degree of acylation of not less than 80%.
BASF Coatings patents
electrophoretic paint
U.S. 8,152,983 B2
BASF Coatings GmbH has obtained a
patent for a method of making an elec-
trocoat composition, which is 5% to
35% by weight solids, comprised of
combining at least one binder comprised
of at least one group that is a potentially
cationic ammonium group and/or
cationic ammonium group, and one or
more reactive functional groups which
with complementary reactive functional
groups in a crosslinking agent are able
to undergo thermal crosslinking reactions, at least one crosslinking agent
comprised of the complementary reactive functional groups, from 0.2% to 5%
by weight, based on solids in the composition, of a bismuth subsalicylate compound having an empirical formula of
C7H5O4Bi that is water-insoluble and
pulverulent, wherein the bismuth subsalicylate has a bismuth content of from
56.5% to 60% by weight; pigments selected from the group consisting of color
pigments, effect pigments, electrically
conductive pigments, magnetically
shielding pigments, fluorescent pigments,
extender pigments, anticorrosion pigments, organic pigments, inorganic pigments, and mixtures comprised of at
least one of the foregoing; and a grinding
resin; wherein the electrocoat composition is made by mixing and milling the
grinding resin and the pigments, in combination with the bismuth subsalicylate,
in a means for obtaining fineness of mixture to form a storage stable pigment
paste, and then combining the pigment
paste with a dispersion comprised of the
binder and crosslinking agent.
DuPont patents fluoropolymer
coating
U.S. 8,153,198 B2
E I du Pont de Nemours and Company
has been awarded a patent for a solution
comprised of a solvent and an amorphous
copolymer, the amorphous copolymer is
comprised of 50% to 80% mole of
monomer units derived from tetrafluoroethylene and 20% to 50% mole of
monomer units derived from 1,2, 3, 3,3-
pentafluoropropylene, and wherein solubility of the copolymer is limited to
fluoroaromatic hydrocarbons.
Behr patents pigment spacing
U.S. 8,163,078 B2
Behr Process Corporation has obtained a
patent for a process for modifying a paint
composition containing titanium dioxide
particles comprised of dispersing between
a 0.05% and a 5.0% by weight of metal
oxide nanoparticles, pre-treated to minimize flocculation, in the paint composition containing the titanium dioxide
particles; and interacting the metal oxide
nanoparticles and the titanium dioxide
particles to form an intervening dispersion
of a plurality of metal oxide nanoparticles, the intervening dispersion uniformly
distributed around the titanium dioxide
particles; wherein the step of dispersing
the metal oxide nanoparticles is comprised of mixing a first set of metal oxide
nanoparticles having a first average particle size and a second set of metal oxide
nanoparticles having a second average
particle size, the first set of metal oxide
nanoparticles and the second set of metal
oxide nanoparticles having pre-treated
surfaces to minimize flocculation; and further wherein the first average particle size
is approximately 120 nm and the second
average particle size is 60 nm.
Eckart patents platelyet-shaped metallic effect
pigments
U.S. 8,163,079 B2
Eckart GmbH has been granted a patent
for platelet-shaped, copper-containing,
metallic effect pigments, which have a
copper content of 60% to 100% by
weight, based on the total metal content,
wherein the metallic effect pigments
have a thickness distribution as determined via thickness counting by scanning electron microscopy (SEM) and
