US 11,851,577 B2
Direct-to-metal coating composition
Sundaresan Avudaiappan, Cleveland, OH (US); Wendy M. Novelli, Cleveland, OH (US); and Ganesh S. Desai, Cleveland, OH (US)
Assigned to SWIMC LLC, Cleveland, OH (US)
Filed by SWIMC LLC, Cleveland, OH (US)
Filed on Jul. 1, 2021, as Appl. No. 17/305,207.
Application 17/305,207 is a continuation of application No. 15/945,111, filed on Apr. 4, 2018, abandoned.
Claims priority of provisional application 62/481,157, filed on Apr. 4, 2017.
Prior Publication US 2021/0403727 A1, Dec. 30, 2021
Int. Cl. C09D 5/08 (2006.01); C09D 5/44 (2006.01); C09D 7/40 (2018.01); C09D 167/00 (2006.01); C09D 175/04 (2006.01); C09D 175/02 (2006.01); C09D 5/00 (2006.01); C08K 3/36 (2006.01); C08K 9/02 (2006.01); C08K 3/34 (2006.01); C08K 3/30 (2006.01); C08K 3/22 (2006.01); C08K 7/18 (2006.01); C08K 7/00 (2006.01)
CPC C09D 5/084 (2013.01) [C09D 5/00 (2013.01); C09D 5/4423 (2013.01); C09D 5/4465 (2013.01); C09D 7/68 (2018.01); C09D 7/69 (2018.01); C09D 7/70 (2018.01); C09D 167/00 (2013.01); C09D 175/02 (2013.01); C09D 175/04 (2013.01); C08K 3/34 (2013.01); C08K 3/36 (2013.01); C08K 7/00 (2013.01); C08K 7/18 (2013.01); C08K 9/02 (2013.01); C08K 2003/2241 (2013.01); C08K 2003/3045 (2013.01); C08K 2201/005 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A direct to metal coating composition comprising:
(a) a binder resin system comprising a malonate-acryloyl resin that forms a coating by Michael addition reaction;
(b) a plurality of filler and extender pigments having median particle size of 0.1 to 10 μm comprising
(i) between 5 to 50 wt %, spherical shaped pigment;
(ii) between 2 to 30 wt acicular shaped pigment; and
(iii) between 1 to 30 wt % platy-shaped pigment; and
(c) a corrosion inhibiting pigment,
wherein the coating composition is applied to a substrate as a direct-to-metal coating having creep from scribe of less than 3 mm after 500 hours of salt spray testing according to ASTM B117, and color change (ΔE) of less than about 0.5 after 1200 hours of uv exposure in Xenon Accelerated Weather testing according to ASTM G155-05a Cycle 7A.