Patents Update
BASF patents aqueous coating
Patent No. U.S. 7,297,375 B2
BASF Coatings AG has obtained an
aqueous coating material curable
physically, thermally and with actinic
radiation comprised of at least one
stabilized polyurethane, as binder at
least one effect pigment or a mixture
of a color pigment and an effect pigment, and at least one transparent or
colorless powder present in an amount
of 0.09-5.0% by weight. Based on the
solids content of the coating material,
the powder is substantially inert with
respect to the other constituents of the
coating material and whose particles
have an average particle size of from
3.0-7.5 μm, a particle size distribution
such that the maximum particle size
is below 10 μm, and a density of from
0.8 to 3. 6 g cm − 3, wherein the at least
one stabilized polyurethane, the at
least one effect pigment, and the at
least one transparent or colorless powder are present in a combination such
that a coating prepared from the aqueous coating material provides a cloud
free metallic effect.
COBALT BASED NON-TOXIC
CORROSION-PROTECTION COATING
Patent No. U.S. 7,294,211 B2
University of Dayton, Dayton, OH
has been granted a patent for a solid
corrosion-inhibiting conversion coating formed on a substrate metal. The
conversion coating is comprised of
cobalt, wherein the cobalt is trivalent
cobalt, or tetravalent cobalt, or combinations thereof, and a valence stabilizer combined to form a cobalt/valence
stabilizer complex within the solid
corrosion-inhibiting conversion coating, and wherein the cobalt/valence
stabilizer complex has a solubility in
water of between about 5× 10−1 and
about 1× 10− 5 moles per liter of cobalt
at approximately 25°C and 760 Torr,
and wherein the valence stabilizer is
selected from an organic valence stabilizer and an inorganic valence stabilizer, with the proviso that the inorganic valence stabilizer is not a vanadate or a tungstate, and the organic
valence stabilizer is not a carboxylate.
COATING WITH LEAD-FREE
ELECTRODEPOSITION COATING
Patent No. U.S. 7,294,410 B2
Honda Motor Co., Ltd. and Nippon
Paint Co., Ltd. have been granted a
patent for a method for coating an
alloyed hot-dip galvanized steel plate
with a cationic electrodeposition coating composition in which the lead content thereof is less than or equal to 10
ppm, and which includes a binder
resin and a plurality of pigments. The
method is comprised of electrodepositing the lead-free cationic electrodeposition coating composition onto the
alloyed hot-dip galvanized steel plate,
wherein the binder resin includes a
cationic base resin and a crosslinking
agent, and the pigments include 5-
30% by mass of pigment formed from
a compound having an aluminum-containing cation and a phosphate-containing cation, and 5-30% by mass
of a silicon oxide pigment having a
pore volume of 0.44-1.8 ml/g and an
average particle size of approximately
10 μm or less.
CHUGOKU MARINE AND SHIN ETSU
PATENT ANTIFOULING PAINT
Patent No. U.S. 7,297,745 B2
Chugoku Marine Patents, Ltd., and
Shin Etsu Chemical Co. Ltd. have been
awarded a patent for a method of rendering a base material or a shaped item
antifouling with an antifouling paint
made from a curable composition comprised of an organopolysiloxane having
functional groups capable of condensation reaction at both molecular terminals, and a hydrophobic silica thermal-
ly treated together with the
organopolysiloxane. The method is comprised of heating the hydrophobic silica
with at least part of the
organopolysiloxane to produce the
thermally treated hydrophobic silica,
combining additional organopolysiloxane with the thermally treated
hydrophobic silica to form the curable
composition, preparing an antifouling
paint from the curable composition,
coating or impregnating a surface of a
base material or a shaped item with the
antifouling paint, and subsequently
curing the coating composition to form
an antifouling coating film, wherein the
base material or the shaped item are
underwater structures, sea water utilizing apparatus, ships, ship shell plates,
fishing materials and fishing gear.
COGNIS PATENTS HARDENERS
FOR WATER-BASED EPOXY RESIN
Patent No. U.S. 7,300,963 B2
Cognis has obtained a patent for a
hardener for water-based epoxy resin
systems. The hardener is prepared by a
process comprised of reacting a mixture
comprised of at least one epoxidized
polyalkylene oxide selected from the
group of epoxidized polyethylene
oxides, epoxidized polypropylene oxides,
epoxidized polyethylene propylene
oxides and mixtures thereof; at least
one epoxidized aromatic hydroxy compound selected from the group of
bisphenol A epoxides, bisphenol F epoxides and mixtures thereof; and at least
one aromatic hydroxy compound selected from the group of bisphenol A,
bisphenol F and mixtures thereof, to
form an intermediate product; and
introducing an excess amount of
polyamine sufficient for the reaction of
one molecule of polyamine with each
epoxy group in the intermediate product, and reacting the intermediate
product with the polyamine. CW
