Patent ID: 8709307

Claim:
A method of using a composition comprising, as a solid system or a solvent-less liquid system, the following components: 1) obtaining by purchasing or preparing by known methods a Polymer Matrix selected from the group consisting of hyperbranched polycarboxysilane polymer, hyperbranched polycarbosiloxane polymer, hyperbranched polyurea siloxane polymer and preparing their functionalized derivatives, and 2) obtaining by purchase carbon nanotubes (CNT) as optical power limiters (OPL) having a size from about 0.1 μm to about 5 μm in length and about 1 nm to about 30 nm in diameter; and 3) obtaining by purchase or prepared using known method carbon-rich molecules that liberate carbon as a decomposition product by instant blackening when irradiated with intense laser beams; 4) mixing the CNT and the carbon-rich molecules with the Polymer Matrix either separately or at the same time; and 5) mixing the Polymer Matrix containing the CNT with the Polymer Matrix containing the carbon-rich molecules; and 6) applying the mixture to a substrate to prepare a film or a coating; 7) curing the film or the coating to obtain a solid film or coating; and 8) evaluating the cured film or coating for optical power limiting properties under exposure to a laser beam.