US 11,834,584 B2
Weatherable and durable coating compositions
Erin B. Vogel, Midland, MI (US); Susan Machelski, Midland, MI (US); Ray E. Drumright, Midland, MI (US); Paul J. Popa, Auburn, MI (US); Gary M. Wieber, Midland, MI (US); Gerald Lawrence Witucki, Midland, MI (US); Patrick J. Fryfogle, Midland, MI (US); and Adam C. Tomasik, Mount Pleasant, MI (US)
Assigned to DOW GLOBAL TECHNOLOGIES LLC, Midland, MI (US); and Dow Silicones Corporation, Midland, MI (US)
Appl. No. 17/253,341
Filed by Dow Global Technologies LLC, Midland, MI (US); and Dow Silicones Corporation, Midland, MI (US)
PCT Filed Jul. 17, 2019, PCT No. PCT/US2019/042238
§ 371(c)(1), (2) Date Dec. 17, 2020,
PCT Pub. No. WO2020/018689, PCT Pub. Date Jan. 23, 2020.
Claims priority of provisional application 62/700,478, filed on Jul. 19, 2018.
Prior Publication US 2021/0253900 A1, Aug. 19, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C09D 133/12 (2006.01); C09D 133/14 (2006.01); C09D 183/08 (2006.01); C09D 133/06 (2006.01); C08G 77/26 (2006.01); C08L 83/08 (2006.01); C08F 220/32 (2006.01); C08L 33/14 (2006.01); C08L 33/06 (2006.01)
CPC C09D 183/08 (2013.01) [C09D 133/068 (2013.01); C09D 133/12 (2013.01); C08F 220/325 (2020.02); C08G 77/26 (2013.01); C08L 33/068 (2013.01); C08L 33/14 (2013.01); C08L 83/08 (2013.01); C09D 133/14 (2013.01)] 10 Claims
 
1. A curable coating composition comprising:
(1) an amino-functional silicone resin of the fully condensed formula
RxSiO(4−x)/2 where
(a) x is a number from 1.0 to 2.1;
(b) the amino-functional silicone resin is comprised of the Si units R3SiO1/2, R2SiO2/2, RSiO3/2, and SiO4/2 in polymerized form, where at least 5 mole percent of the total amount of Si units of the amino-functional silicone resin comprise (i) RSiO3/2 groups, (ii) SiO4/2 groups or (iii) mixtures thereof;
(c) each R is independently an alkyl group, an aryl group, or an amino-functional hydrocarbyl group, provided that the —NH— equivalent mass of the amino-functional silicone resin is from 50 to 750; and
(2) an acrylic copolymer which has, in polymerized form, epoxy functionalized groups and cure compatibility groups; and
wherein the coating composition has a molar ratio of amine NH functionality to epoxy functionality in the range of from 0.5 to 1.3.