C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/2, 400/7024
C08F 8/30 (2006.01) C08F 20/10 (2006.01) C08K 5/22 (2006.01) C09D 7/12 (2006.01) C09D 133/14 (2006.01)
Patent
CA 2001738
POLYMER BOUND LIGHT STABILIZER COATING RESINS ABSTRACT OF THE DISCLOSURE Acrylic coating resins with attached light stabilizer functional groups are provided. The polymer bound light stabilizer coating resins are prepared by reacting light stabilizer hydrazides, LS-C(=o)-NR3-NH2, with an acrylic prepolymer containing at least two different types of reactive functional groups, one of which is a hydroxyalkyl ester yroup and the other is carboxyl, anhydride, epoxy or isocyanate. LS is a light stabilizer moiety, and R3 is hydrogen, primary alkyl of 1 to 8 carbons, secondary alkyl of 3 to 8 carbons, aralkyl of 7 to 12 carbons or cycloalkyl of 5 to 12 carbons.The reaction may be carried out in an inert solvent or in the bulk state. The acrylic resins so produced with chemically bound light stabilizer groups are particularly useful in the stabilization of coatings. Enamel or lacquer coatings containing the polymer bound light stabilizer resins exhibit outstanding weatherability and durability. As a result of being chemically bound, the light stabilizers are resistant to loss due to volatility and extractability during typical coatinqs bake operations and exposure to the elements of weather.
Kamath Vasanth R.
Sargent James D.
Borden Ladner Gervais Llp
Kamath Vasanth R.
Pennwalt Corporation
Sargent James D.
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