10.02.14
US Patent No. 8,821,846 B2; Avon Products has patented a method of lengthening keratin fibers. It is comprised of a fluid composition that contains a solvent and polymer selected from the group consisting of polyimide, polyurethane-14AMP-acrylate and hydrogenated polycyclopentadiene to the hair. The fluid composition is then pulled with a brush or applicator to draw out the composition beyond the end of the fibers; and allowing the solvent to evaporate such that the polymer set forms a filamentous extension anchored to the keratin fiber. The composition is free of polyvinyl pyrrolidone and polyvinyl alcohol.