Coatings World - March 2009

Patents Update
Valspar patents durable polyester coating

Patent No. U.S. 7,381,472 B2 Valspar has been granted a patent for a coated substrate comprised of a substrate coil, and a coating composition applied to at least one major surface of the substrate coil, wherein the coating composition is comprised of a binder comprised of a polyester resin that is formed using at least one aromatic dicarboxylic acid and using polyols comprised of at least one symmetric diol in an amount greater than 50% weight based on the total weight of polyols and at least one asymmetric diol in an amount greater than 20% weight based on the total weight of polyols, wherein the polyester resin comprises between 50-75% weight isophthalic acid based on

the total weight of resin and has a glass transition temperature of at least 35° C.; wherein the symmetric diol includes both 1,3-propanediol and neopentyl glycol; and wherein the flexibility of the coated substrate is at least 1T with no tape off.

IRON OXIDE PIGMENTS Patent No. U.S. 7,387,671 B2 Lanxess has obtained a patent for a pigment comprised of iron oxide, wherein the pigment has an L*, a* and b* value as measured in a lightened tone in CIELAB units of L*= 58 to 62, a*= 22 to 27, b*= 10 to 24, and wherein the content of the iron oxide is greater than 99% by weight based on the pigment and further

wherein the pigment has a mean solids diameter of 10 to 500 μm.

COATED ARTICLE WITH REMOVABLE PROTECTIVE COATING Patent No. U.S. 7,361,404 B2 PPG has obtained a patent for a coated substrate comprised of a substrate having a surface; and a removable protective coating comprised predominantly of a crystalline or amorphous carbon-containing material deposited over at least a portion of the substrate; and a functional coating deposited over the substrate, wherein the functional coating is between the substrate and the removable protective coating. CW

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