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Sherwin-Williams patents ambient cure



Published February 6, 2007
Patent No. U.S. 7,074,856 B2
The Sherwin-Williams Company has been granted a patent for an ambient temperature curing coating composition comprised of the crosslinked reaction product of an amino-functional compound, wherein the amino-functional compound is a bis-silylamine of formula: (R2)b(R1Y)aSi-Q1-NH-Q2-(NH-Q3)n-Si(YR1)a(R2)b
n>0
a=3-b
b=0, 1 or 2
each Y is independently a heteroatom is selected from O or N; if Y is N, then the valency of Y is 2; if Y is O, then the valency of Y is 1; each R1 is independently a monovalent radical selected from the group consisting of hydrogen, hydrocarbon including but not limited to linear alkyl, or branched alkyl, cycloalkyl, aryl, allyl, or aralkyl; each R1 may be the same or different; R2 is a monovalent radical, wherein R2 can optionally include a heteroatom selected from the group consisting of oxygen, nitrogen, sulfur, wherein R2 is not directly bonded to the silicon atom, and wherein R2 is linear or branched alkyl, cycloalkyl, aryl, allyl, or aralkyl, and wherein each R2 may be the same or different; Q1, Q2, Q3 is a divalent bridging group, including but not limited to an alkylene and can be branched or cyclic; each Q can be the same or different; and an acrylic polymer having pendant alkoxysilane and optionally epoxy groups.


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