Compositions containing thermally conductive fillers

A composition, comprising:

• an electrophile comprising a first functional group comprising an epoxide functional group and/or an isocyanate functional group in an amount of 1% by volume to 90% by volume based on total volume of the composition;
• a nucleophile comprising a second functional group comprising a thiol functional group, an amine functional group, and/or a hydroxyl functional group in an amount of 1% by volume to 90% by volume based on total volume of the composition, wherein the second functional group is capable of reacting with the first functional group;
• and
• a thermally conductive filler package comprising thermally conductive, electrically insulative filler particles, the thermally conductive, electrically insulative filler particles having a thermal conductivity of at least 5 W/m·K, as measured according to ASTM D7984, and a volume resistivity of at least 10 Ω·m, as measured according to ASTM D257, the thermally conductive, electrically insulative filler particles being present in an amount of at least 90% by volume based on total volume of the filler package;
• wherein the thermally conductive filler package is present in an amount of at least 30% by volume to no more than 98% by volume based on total volume of the composition;
• and
• wherein the composition has a viscosity of 103 cP to 108 cP at a shear stress of 800 Pa as measured by an Anton Paar MCR 301 rotational rheometer at 25° C. using a parallel plate with a diameter of 25 mm (1 mm gap).