申请人:Minnesota Mining and Manufacturing Company
公开号:US04980096A1
公开(公告)日:1990-12-25
Surfactants which are blocked against surfactant action (identified herein as "photolabile blocked surfactants") by a photolabile protective or masking group but which, on exposure to actinic radiation, become unblocked are provided. Coating compositions in which surfactant is formed on irradiation are provided by blending the photolabile blocked surfactant with polymeric film-forming materials. Compositions containing the photolabile blocked surfactants are useful when employed as protective coatings on various substrates or as the adhesive in a pressure sensitive adhesive tape. Although initially well adhering to a substrate, such compositions may be readily removed from the substrate following exposure of the same to suitable radiation which unblocks the surfactant to permit it to regain its surfactant activity.
本文提供了一种被光敏保护或掩蔽基团阻止表面活性剂作用的表面活性剂(在此称为“光致敏阻断表面活性剂”),但在暴露于光致辐射后变得未被阻断的方法。通过将光致敏阻断表面活性剂与聚合膜形成材料混合,可以提供形成表面活性剂的涂层组成物。含有光致敏阻断表面活性剂的组成物在用作各种基底的保护涂层或作为压敏胶带中的粘合剂时非常有用。尽管最初与基底粘附良好,但在将其暴露于适当的辐射后,这些组成物可以轻松地从基底上取下,因为这样可以解除表面活性剂的阻断,使其恢复其表面活性。