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.
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17. An article, comprising:
a first substrate;
a second substrate; and
the composition of claim 1 positioned between the first and second substrates.
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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.
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