U.S. 8,632,856 B2
3M Innovative Properties Company has
been granted a patent for a method for
making a coated article, which method
is comprised of providing a substrate;
providing microparticles of a partially
or fully fluorinated polymer and providing a partially fluorinated binder
soluble in one or more of butyl acetate,
ethyl acetate, methanol, dimethylacet-amide, dimethylformamide, dimethyl-sulfoxide, acetone, methyl ethyl ketone,
sulfolane or tetrahydrofuran, wherein
the partially fluorinated binder is a
fluorothermoplastic comprising a ter-polymer of tetrafluoroethylene, hexaflu-oropropylene, and vinylidene fluoride;
applying to at least a portion of the
substrate a coating comprising the microparticles and a solution of the binder
in a nonfluorinated solvent that dissolves the binder and does not dissolve
the microparticles, wherein prior to applying the binder solution to the substrate the microparticles are dispersed
in the binder solution, or after applying
the binder solution to the substrate the
microparticles are sprinkled or otherwise deposited on the applied binder;
and heating the coating sufficiently to
bond the microparticles to the binder
but not so much as to cause the receding water contact angle for the coating
to fall below 80°, wherein the coating comprises 70 to 95 weight percent
microparticles based on a total weight
of the microparticles plus the partially
fluorinated binder.
Valspar Patents Bisphenol
A And Aromatic Glycidyl
Ether-Free Coatings
U.S. 8,632,857 B2
Valspar Sourcing Inc. has been awarded
a patent for a method of coating a metal
substrate with a hardenable packaging
coating system comprised of applying
an under-coat composition to a metal
substrate, the under-coat composition
contains a polyester (co)polymer, and a
phenolic cross-linker; applying an over-
coat composition to the under-coated
metal substrate, the over-coat composi-
tion is comprised of a PVC organosol
containing a poly(vinyl chloride) (co)
polymer dispersed in a substantially
nonaqueous over-coat carrier liquid,
wherein the over-coat composition in-
cludes finely divided poly(vinyl chlo-
ride) co(polymer) particles that exhibit
a volume average particle diameter from
approximately 0.5 to 30 micrometers;
and curing the under-coat and over-coat
compositions in combined or separate
cure steps to provide a hardened film
on the metal substrate that includes
the under-coat and over-coat composi-
tions, wherein the under-coat composi-
tion can optionally be at least partially
cured prior to application of the over-
coat composition; wherein the under-
coat and over-coat compositions are
substantially free of mobile BPA, BPF,
BADGE and BFDGE.
GM Global Technology
Operations Patents Self-
Repairing Polymer
U.S. 8,633,293 B2
GM Global Technology Operations has
been granted a patent for a polymer com-
prised of a reaction product of an epoxy
resin; a first crosslinking agent reactive
with the epoxy resin and having a first
molecular weight; and a second crosslink-
ing agent reactive with the epoxy resin,
wherein the second crosslinking agent is
an amine having a polyether backbone,
at least one amino group attached to the
polyether backbone, and a second mo-
lecular weight of at least 2.5 times greater
than the first molecular weight; wherein
the polymer has a first phase having a first
glass transition temperature at which the
polymer is transformable between a first
shape and a second shape; wherein the
second crosslinking agent is crystalliz-
able within the polymer and thereby has
a melting temperature that is detectable
within the polymer; wherein the polyether
backbone includes ethylene oxide and
propylene oxide.
PPG Patents Coating For
Decorative Metals With
Improved Mar And Scratch
Resistance And Methods Of
Application
U.S. 8,632,895 B2
PPG has obtained a patent for a coated
article comprised of a decorative metal
substrate having a specular gloss greater
than 400, with the proviso that the decorative metal substrate does not contain a
pigmented coating thereon, a transparent
cured coating thereon applied directly to
the decorative metal substrate containing
a resinous binder, 0.5 to 10 percent by
weight based on total solids weight of the
coating of a surface active agent and inorganic particles in which the concentration
of particles in the exposed surface region
of the cured coating is greater than the
bulk region of the cured coating.
3M Patents Aqueous
Coating Composition
U.S. 8,633,263 B2
3M has received a patent for a composition comprised of an aqueous continuous
liquid phase; and core-shell particles dispersed in the aqueous continuous liquid
phase, each core-shell particle comprising
a polymer core surrounded by a shell consisting essentially of nonporous spherical
silica particles disposed on the polymer
core, wherein the polymer core comprises
at least one polymer, wherein a weight
ratio of a total amount of the nonporous
spherical silica particles in the composition to a total amount of the at least one
polymer in the composition is in a range
of from 85: 15 to 95: 5, wherein the nonporous spherical silica particles have a
volume average particle diameter of 60
nanometers or less, and wherein the composition has a pH value of less than 5. CW
3M Patents Highly Water
Repellent Fluoropolymer Coating
