The invention provides compositions and methods for reversible covalent binding of benefit agents to keratinous substrates through the reaction of a dicarbonyl functional group on the surface of a benefit agent with reactive amines on keratinous surfaces. The deposits formed are durable and resistant to transfer, but are readily removed by contacting the deposit with an amine-containing solution.本發明提供透過有益試劑表面上之二羰基官能團與角質表面上之反應性胺之反應而使該有益試劑可逆共價結合至角質基底之組合物及方法。所形成之沈積物持久並抗轉移,但很容易藉由該沈積物與含胺溶液接觸來移除。1‧‧‧β二羰基化合物/β二酮基官能化化合物2‧‧‧具有羥基之微粒材料/具有存於其表面上之羥基之無機粒子3‧‧‧表面官能化有益試劑/可附接至角質基底之表面之官能化有益試劑
