Abstract: Provided are a thermally emissive coating material composition, a thermally emissive coating and a coating forming method without any thermally emissive filler. Such a thermally emissive coating material composition includes a poly-?-olefin having a side chain with 5 to 20 carbon atoms and a silane coupling agent. The side chain preferably includes 10 to 15 carbon atoms. The thermally emissive coating material composition forms a thermally emissive coating on a surface of a base material.

Abstract: Provided are a thermally emissive coating material composition, a thermally emissive coating and a coating forming method without any thermally emissive filler. Such a thermally emissive coating material composition has a structure in which a straight alkyl with 4 to 16 carbons atoms is bonded to a phenol nucleus of a resol-type phenolic resin via an ether bond. The thermally emissive coating material composition may be formed by dehydrogenative condensation of a resol-type phenolic resin with a linear primary alcohol with 4 to 16 carbon atoms. The thermally emissive coating material composition forms a thermally emissive coating on a surface of a base material.