Pa tents Update
PPG patents fluorescent colorants
Patent No. U.S. 7,384,694 B2
PPG Industries has been granted
a patent for a multi-layer coating
applied to a substrate wherein the
coating reflects colored light and is
comprised of an upper layer comprised of a resinous binder and colorants which emit fluorescent light
when exposed to visible light; the colorants being selected from dyes and
pigments that will not scatter light
that mask fluorescent light; the colorants being present in the upper
layer in amounts of 0.001 to 50
weight percent; and a lower layer
comprising a resinous binder and
light-absorbing particles, wherein
the coating composition exposed to a
first light level exhibits a first colored appearance that is dominated
by absorbance of light by both of the
colorants and the light-absorbing
particles and wherein the coating
composition exposed to a second
light level of higher intensity than
the first light level exhibits a second
colored appearance dominated by
fluorescent light emitted by the colorants, wherein the lower layer has a
color value L* less than 40.
ROHM AND HAAS PATENTS
COATING COMPOSITION
Patent No. U.S. 7,417,086 B2
Rohm and Haas Company has
received a patent for a method of
making an aqueous composition,
suitable when dry as a coating, comprised of providing at least one aqueous polymer that has a glass transition temperature from -80° C to 110°
C, wherein the aqueous polymer is
made by aqueous emulsion polymerization of a monomer mixture that
excludes all dienes and that comprises 1% to 99% acrylate monomers, by
weight based on the total weight of
all monomers; adding to the aqueous
polymer at least 10 ppm of at least
one coordinating agent, by weight
based on the dry weight of the at
least one polymer, and raising the
pH of the aqueous polymer from 7 or
less to above 7, wherein the aqueous
composition contains 0 to 100 ppm
ammonia compound, by weight based
on the dry weight of the at least one
polymer.
ELIOKEM POLYMER BINDER
FOR INTUMESCENT COATING
Patent No. U.S. 7,417,091 B2
Eliokem has been granted a
patent for a method of manufacturing an intumescent coating comprised of the step of dissolving a
Newtonian and a reticulated copolymer in a solvent, wherein the
Newtonian copolymer is comprised of
p-methylstyrene repeat units and 2-
ethylhexylacrylate repeat units,
wherein the reticulated copolymer is
comprised of p-methylstyrene repeat
units and 2-ethylhexylacrylate
repeat units, and wherein the solvent is selected from the group consisting of organic solvents and water,
and homogenizing the mixture in the
solvent, wherein an anti-settling
agent and at least one additive
selected from the group consisting of
conventional reactive pigments systems, dispersants, plasticizers,
defoamers, thickeners, chlorinated
paraffin solvents, waxes, fillers, and
fibers is added to the solvent during
the homogenizing step.
MERCK PATENTS TRANSPARENT
CONDUCTIVE PIGMENTS
Patent No. U.S. 7,416,688 B2
Merck Patent has obtained a
patent for transparent conductive
pigments comprised of flake-form
substrates coated with a conductive
layer, wherein the number-weighted
mean particle area F of the trans-
50
parent conductive pigments is
greater than or equal to 150 μm .
2
BASF PATENTS
TRANSPARENT COATINGS
Patent No. U.S. 7,416,781 B2
BASF Coatings has received a
patent for an article comprised of a
transparent coating, wherein the
coating has a thickness of at least 30
μm, a relative elastic resilience to
DIN 55676 of at least 70%, and a
scratch resistance corresponding to a
score of not more than two in a steel
wool scratch test according to DIN
1041 after 10 double strokes; and
wherein the coating is prepared from
a coating material comprised of an
aqueous dispersion with a pH of from
2 to 7 comprised of at least one
swellable polymer and/or oligomer
containing at least one functional
group that is at least one of an anionic functional group, a potentially
anionic functional group, and/or a
nonionic hydrophilic functional
group, surface-modified, cationically
stabilized inorganic nanoparticles of
at least one kind, and at least one
amphiphile.
PPG PATENTS ALKYD-BASED
FREE RADICAL WOOD COATING
Patent No. U.S. 7,387,843 B2
PPG Industries has received a
patent for a coating composition
comprised of a polymer that can be
cured by free radical initiation and
comprised of an alkyd portion and a
free radical curable portion comprising polymerizable ethylenically
unsaturated groups derived from an
electron rich compound; a free radical or cationic initiator; and 60 to 80
weight percent, based on the total
weight of the composition, of a organic solvent. CW
