# US 12,759,264 B2 · Articles containing adhesive compositions exhibiting on-demand debonding behavior

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- Number: US 12,759,264 B2
- Document ID: US12759264B2
- Status: Granted
- Kind: B2
- Application number: 18/564,643
- Filed: 2022-05-13
- Published: 2024-08-01
- Granted: 2026-10-13
- Earliest claimed: 2021-06-04
- Assignees: 3M Innovative Properties Company
- Applicants: 3M Innovative Properties Company
- Inventors: Aaron T. Hedegaard; Mahfuza B. Ali; Ibrahim A. El Hedok; Jason D. Clapper; Eric J. Olson; Lindsey Hines; Ross E. Behling; Kevin D. Hagen
- Web page: https://patentgrep.com/patent/US12759264B2

## CPC

- B32B 7/06: permitting easy separation
- B32B 3/30: characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)}
- B32B 5/18: characterised by features of a layer {of} foamed material
- B32B 7/025: Electric or magnetic properties
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 43/006: {Delaminating}
- C09J 5/00: Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J 7/20: characterised by their carriers
- C09J 7/385: {Acrylic polymers}
- C09J 133/08: Homopolymers or copolymers of acrylic acid esters
- B32B 2250/03: 3 layers
- B32B 2307/202: Conductive
- B32B 2307/748: Releasability
- B32B 2405/00: Adhesive articles, e.g. adhesive tapes
- C09J 2301/1242: the opposite adhesive layers being different
- C09J 2301/302: the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
- C09J 2301/314: the adhesive layer and/or the carrier being conductive
- C09J 2301/502: process for debonding adherents
- C09J 2433/00: Presence of (meth)acrylic polymer
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)

## Abstract

An article comprising a first component having a first electrically conductive surface and a second component having a second surface. An adhesive composition comprising a zwitterionic polymer is disposed between the first electrically conductive surface and second surface and joins the first component to the second component. The effort required to separate the first component from the second component, as measured by work of adhesion per surface area, is reduced by application of a DC electric potential across the adhesive composition.

## Claims

### Claim 1

An article comprising:
a first component having a first electrically conductive surface;
a second component having a second surface; and
an adhesive composition disposed between the first electrically conductive surface and the second surface, the adhesive composition comprising a zwitterionic polymer,
wherein the adhesive composition joins the first component to the second component, and
wherein the effort required to separate the first component from the second component, as measured by work of adhesion per surface area, is reduced by application of a DC electric potential across the adhesive composition; and
wherein the zwitterionic polymer consists essentially of the polymerized product of:
a. 0.2 wt % to 16 wt %, based on the total weight of polymer, of anionic monomers comprising acrylic acid, methacrylic acid, a carboxylate salt thereof, or a mixture of two or more thereof, wherein the amount of carboxylate salt is based on the weight of the corresponding free acid;
b. 2 wt % to 25 wt %, based on the total weight of polymer, of one or more cationic monomers comprising an acrylate or a methacrylate ester having alkylammonium functionality;
c. 50 wt % to 95 wt %, based on the total weight of polymer, of one or more nonionic monomers comprising an acrylate or a methacrylate ester of an alcohol having between 2 and 18 carbons; and
d. 0 wt % to 40 wt %, based on the total weight of polymer, of more or more additional monomers.

### Claim 2 (depends on 1)

The article of claim 1, wherein the acrylate or methacrylate ester including an alkylammonium functionality is the reaction product of 2-(dimethylamino)ethyl acrylate or 2-(dimethylamino)ethyl methacrylate with an alkyl bromide or an alkyl chloride having between 1 and 24 carbon atoms.

### Claim 3 (depends on 1)

The article of claim 1, wherein the first component comprises a first nonconductive material and a first electrically conductive coating to provide the first electrically conductive surface.

### Claim 4 (depends on 1)

The article of claim 1, wherein the second surface of the second component is a second electrically conductive surface.

### Claim 5 (depends on 4)

The article of claim 4, wherein the composition of the first electrically conductive surface is different from the composition of the second electrically conductive surface.

### Claim 6 (depends on 4)

The article of claim 4, wherein the adhesive composition is a two-sided adhesive comprising:
a carrier having a first major surface and a second major surface opposite the first major surface,
a first adhesive composition comprising a first zwitterionic polymer on the first major surface of the carrier, and
a second adhesive composition comprising a second zwitterionic polymer on the second major surface of the carrier,
wherein a surface of the first adhesive composition opposite the carrier is in contact with the first electrically conductive surface of the first component, and
wherein a surface of the second adhesive composition opposite the carrier is in contact with the second surface of the second component.

### Claim 7 (depends on 6)

The article of claim 6, wherein the carrier is a porous material.

### Claim 8 (depends on 6)

The article of claim 6, wherein the carrier is an electrically conductive material.

### Claim 9 (depends on 6)

The article of claim 6, wherein the composition of the first zwitterionic polymer is the same as the composition of the second zwitterionic polymer.

### Claim 10 (depends on 6)

The article of claim 6, wherein the composition of the first zwitterionic polymer is different from the composition of the second zwitterionic polymer.

### Claim 11 (depends on 1)

The article of claim 1, wherein the second surface of the second component is a nonconductive surface and the adhesive composition is a two-sided adhesive comprising:
a carrier having a first major surface and a second major surface opposite the first major surface,
a first adhesive composition comprising a first zwitterionic polymer on the first major surface of the carrier, and
a second adhesive composition comprising a second zwitterionic polymer on the second major surface of the carrier,
wherein a surface of the first adhesive composition opposite the carrier is in contact with the first electrically conductive surface of the first component,
wherein a surface of the second adhesive composition opposite the carrier is in contact with the second surface of the second component, and
wherein the carrier is electrically conductive.

### Claim 12 (depends on 11)

The article of claim 11, wherein the carrier is a porous material.

### Claim 13 (depends on 1)

The article of claim 1, further comprising a first outer adhesive on a side of the first component opposite the adhesive composition, a second outer adhesive on a side of the second component opposite the adhesive composition, or a combination thereof.

### Claim 14 (depends on 13)

The article of claim 13, wherein at least one of the first outer adhesive and second outer adhesive comprises a pressure sensitive adhesive.

### Claim 15 (depends on 1)

The article of claim 1, wherein at least one of the first and second components is three-dimensional.

### Claim 16 (depends on 1)

The article of claim 1, wherein the effort required to separate the first component from the second component, as measured by the % change in work of adhesion per surface area at 0 V and 50 V for 100 seconds, is at least 15%.

### Claim 17 (depends on 1)

A method for separating components in the composite article of claim 1, the method comprising applying the DC electric potential across the adhesive composition to separate the first component from the second component.

### Claim 18 (depends on 17)

The method of claim 17, wherein the second surface of the second component is a second electrically conductive surface, the first electrically conductive surface or second electrically conductive surface serves as a negative electrode and the other of the first electrically conductive surface or second electrically conductive surface serves as a positive electrode, the method further comprising applying a DC electric potential so that the adhesive composition debonds from the negative electrode and causes separation of the first component from the second component.

### Claim 19 (depends on 17)

The method of claim 17, wherein the adhesive composition is a two-sided adhesive comprising:
a carrier having a first major surface and a second major surface opposite the first major surface,
a first adhesive composition comprising a first zwitterionic polymer on the first major surface of the carrier, and
a second adhesive composition comprising a second zwitterionic polymer on the second major surface of the carrier,
wherein a surface of the first adhesive composition opposite the carrier is in contact with the first electrically conductive surface of the first component,
wherein a surface of the second adhesive composition opposite the carrier is in contact with the second surface of the second component,
wherein the carrier is electrically conductive, and
wherein the first electrically conductive surface or carrier serves as a negative electrode and the other of the first electrically conductive surface or carrier serves as a positive electrode,
the method further comprising applying a DC electric potential so that the adhesive composition debonds from the negative electrode and causes separation of the first component from the second component.