Coating compositions
The present invention is directed to compositions comprising a first component, a second component, and elastomeric particles. The first component comprises an epoxy-containing compound. The second component comprises a diamine comprising a cyclic ring and/or a polyamine comprising a cyclic ring. The diamine may chemically react with the epoxy-containing compound. Optionally, the cyclic ring of the diamine and/or the polyamine has at least one carbon positioned between the amino functional groups and the cyclic ring structure. Optionally, at least 50% by weight of the elastomeric particles comprise a styrene butadiene core based on total weight of the elastomeric particles. The present invention is also directed to methods of making the compositions, methods of coating a substrate, and coated substrates.
1 . A composition comprising:
a first component comprising an epoxy-containing compound comprising Bisphenol A, Bisphenol F, and/or a novolac resin;
a second component that chemically reacts with the epoxy-containing compound, the second component comprising a diamine comprising a cyclic ring and/or a polyamine comprising a cyclic ring in an amount sufficient to provide a molar ratio of epoxide functional groups from the epoxy-containing compound to amine-hydrogens from the diamine and/or polyamine of 0.75:1 to 1.25:1; and
elastomeric particles, 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 the elastomeric particles have an average particle size of 40 nm to 200 nm, as measured by transmission electron microscopy (TEM).
2 . The composition of claim 1 , wherein the second component further comprises an oligomeric cyclic ring-containing diamine or polyamine.
3 . The composition of claim 1 , wherein at least 50% of the elastomeric particles have an average particle size of less than 150 nm as measured by transmission electron microscopy.
4 . The composition of claim 1 , wherein no more than 50% by weight of the elastomeric particles comprise a polybutadiene core and/or a polysiloxane core based on total weight of the elastomeric particles.
5 . The composition of claim 1 , further comprising a cyclic carbonate-functional molecule.
6 . A substrate comprising a surface, at least a portion of which is coated with or embedded in the composition of claim 1 .
7 . Protective clothing comprising the substrate of claim 6 .
8 . The substrate of claim 6 , wherein the composition, in an at least partially cured state, has a lap shear displacement of at least 2.5 mm at failure and a lap shear strength of at least 30.0 MPa, wherein the lap shear displacement and the lap shear strength are 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.
9 . A method for forming a coating on a surface of a substrate comprising:
mixing the first component and the second component of claim 1 to form the composition; and
applying the composition to the surface of the first substrate, wherein at least a portion of the substrate is coated with the composition following the applying.
10 . A method of forming an article comprising extruding the composition of claim 1 .
11 . The article formed by the method of claim 10 .