US 11,732,125 B2
Coating compositions
Marvin M. Pollum, Jr., Pittsburgh, PA (US); Joseph P. Kriley, Valencia, PA (US); Masayuki Nakajima, Wexford, PA (US); Ljiljana Maksimovic, Allison Park, PA (US); Brian K. Rearick, Allison Park, PA (US); Adam B. Powell, Wexford, PA (US); David J. Fortman, Pittsburgh, PA (US); and Loubna Pagnotti, Wexford, PA (US)
Assigned to PPG Industries Ohio, Inc., Cleveland, OH (US)
Appl. No. 16/968,848
Filed by PPG Industries Ohio, Inc., Cleveland, OH (US)
PCT Filed Dec. 10, 2018, PCT No. PCT/US2018/064695
§ 371(c)(1), (2) Date Aug. 10, 2020,
PCT Pub. No. WO2019/164568, PCT Pub. Date Aug. 29, 2019.
Claims priority of provisional application 62/628,540, filed on Feb. 9, 2018.
Claims priority of provisional application 62/630,473, filed on Feb. 14, 2018.
Prior Publication US 2021/0017379 A1, Jan. 21, 2021
Int. Cl. B32B 27/38 (2006.01); C09D 163/00 (2006.01); C09J 163/00 (2006.01); C08L 63/00 (2006.01); C08G 59/40 (2006.01); C08L 63/04 (2006.01); C08K 3/013 (2018.01); C08G 59/22 (2006.01); C08G 59/24 (2006.01); C08G 59/68 (2006.01); C08L 25/10 (2006.01); C08L 83/04 (2006.01)
CPC C08L 63/04 (2013.01) [B32B 27/38 (2013.01); C08G 59/226 (2013.01); C08G 59/245 (2013.01); C08G 59/4021 (2013.01); C08G 59/68 (2013.01); C08K 3/013 (2018.01); C08L 25/10 (2013.01); C08L 83/04 (2013.01); C09D 163/00 (2013.01); C09J 163/00 (2013.01); C08G 2150/00 (2013.01); C08G 2170/00 (2013.01); C08K 2201/019 (2013.01); C08L 2205/18 (2013.01); C08L 2207/53 (2013.01); C08L 2312/06 (2013.01)] 20 Claims
 
1. A composition, comprising:
an epoxy-containing component comprising an epoxide functionality of greater than 1.0 to less than 3.2 in an amount of 45% by weight to 85% by weight based on total weight of the composition;
elastomeric particles in an amount of greater than 11% by weight to 25% by weight based on total weight of the composition; and
a curing component activatable by an external energy source, the curing component comprising at least one guanidine in an amount of 2% by weight to 20% by weight based on total weight of the composition and comprising a D90 particle size of 25 μm measured by dynamic light scattering;
wherein at least 50% by weight of the elastomeric particles comprise a styrene butadiene core based on total weight of the elastomeric particles; and
wherein at least 50% of the elastomeric particles comprise an average particle size of at least 20 nm and less than 150 nm as measured by transmission electron microscopy.
 
17. An article, comprising:
a first substrate;
a second substrate; and
the composition of claim 1 positioned between the first and second substrates.
 
18. The article of claim 17, wherein the composition, in an at least partially cured state, has a bulk shear stress of at least 33.0 MPa measured in accordance with ISO 11003-2, a bulk shear strain of at least 34.5% measured in accordance with ISO 11003-2, a lap shear strength of greater than 30.0 MPa, measured according to ASTM D1002-10 using 2024-T3 aluminum substrate of 1.6 mm thickness, as measured by an INSTRON 5567 machine in tensile mode with a pull rate of 1.3 mm per minute, and a lap shear displacement at failure of at least 15% of the overlap length.