Electrically disbonding materials
AssigneeEIC Laboratories, Inc.
InventorMichael D. Gilbert
Life of this patent
Estimating the term…
Abstract
An electrochemically disbondable composition is provided having a matrix functionality and an electrolyte functionality wherein the electrolyte functionality is provided by a block copolymer or a graft copolymer. The matrix functionality provides an adhesive bond to a substrate, and the electrolyte functionality provides sufficient ionic conductivity to the composition to support a faradaic reaction at an interface with an electrically conductive surface in contact with the composition, whereby the adhesive bond is weakened at the interface. The composition may be a phase-separated composition having first regions of substantially matrix functionality and second regions of substantially electrolyte functionality. Adhesive and coating compositions and methods of disbonding also are described.
Claims27
A composition, comprising:
- a matrix functionality capable of providing an adhesive bond having a shear strength of greater than 200 psi to an electrically conductive surface, and an electrolyte functionality providing sufficient ionic conductivity to the composition so that, when the matrix functionality forms the adhesive bond to the electrically conductive surface, the composition can support a faradaic reaction with the electrically conductive surface, the faradaic reaction weakening the adhesive bond,
- wherein the electrolyte functionality is provided by a block copolymer or a graft copolymer.
A composition, comprising:
- a curable polymeric material;
- and
- an electrolyte located in the curable material,
- wherein the curable polymeric material, when cured, can form an adhesive bond having a shear strength of greater than 200 psi with an electrically conductive surface, and the composition has an electrolyte functionality that provides sufficient ionic conductivity to support a faradic reaction at the electrically conductive surface, the faradic reaction weakening the adhesive bond, and
- wherein the electrolyte functionality is provided by a block copolymer or a graft copolymer.
A bonded structure, comprising:
- a first material layer having an electrically conductive surface;
- a second material layer having an electrically conductive surface;
- and
- a composition disposed between the electrically conductive surface of the first material layer and the electrically conductive surface of the second material layer, the composition comprising:
- a matrix functionality;
- and
- an electrolyte functionality provided by a block copolymer or a graft copolymer, wherein:
- the matrix functionality forms an adhesive bond having a shear strength of greater than 200 psi to the electrically conductive surface of the first material layer, and
- the electrolyte functionality provides sufficient ionic conductivity to the composition so that the composition can support a faradic reaction at the electrically conductive surface of the first material layer, the faradic reaction weakening the adhesive bond.
A method of disbonding a composition from an electrically conductive surface to which it is bonded, comprising:
- treating a first electrically conductive surface with a composition having a matrix functionality and an electrolyte functionality, the matrix functionality providing an adhesive bond having a shear strength of greater than 200 psi to the first electrically conductive surface, and the electrolyte functionality providing sufficient ionic conductivity to the composition to support a faradaic reaction at an interface of the first electrically conductive surface and the composition, wherein the electrolyte functionality is provided by a block copolymer or a graft copolymer;
- contacting a second electrically conductive surface to the composition;
- and
- applying a voltage across the composition to cause a faradaic reaction at the first electrically conductive surface, whereby the adhesive bond to the first electrically conductive surface is weakened.
Dependencies are inferred from the claim text.