Patents

LORD CORP. PATENTS ROOM

August 11, 2005

LORD CORP. PATENTS ROOM
TEMPERATURE CURABLE
FLUOROPOLYMER COATING
Patent No. U.S. 6,838,407 B2
Lord Corp. has been granted a
patent for a coating composition
made from a two-part mixture. The
first part is comprised of a solution in
organic solvent of a graft-reaction
product of a fluoroelastomer selected
from the group consisting of a polymer
of 1,1-dihydroperfluorobutyl
acrylate; copolymer of vinylidene fluoride
and chlorotrifluoroethylene;
copolymer of vinylidene fluoride and
hexafluoropropylene; copolymer of
vinylidene fluoride and hydropentafluoropropylene;
copolymer of tetrafluoroethylene
and propylene; terpolymers
of vinylidene fluoride, hexafluoropropylene,
and tetrafluoroethylene;
terpolymer of vinylidene fluoride,
tetrafluoroethylene and perfluorovinyl
ether, terpolymer of vinylidene
fluoride, tetrafluoroethylene,
and propylene; and a terpolymer of
vinylidene fluoride and hydropentafluoropropylene
and tetrafluoroethylene,
and a grafting agent grafted to
the fluoroelastomer via a primary
amine group. The grafting agent contains
at least one active hydrogencontaining
group. The second part is
comprised of a curing agent that contains
at least one isocyanate group or
a group bearing an isocyanate group
that bonds to an active-hydrogenbearing
group of the fluoroelastomer,
and a reactive crosslinking group
that bonds to another active hydrogen-
bearing group of the fluoroelastomer.
CW

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