Stretch releasing optically clear pressure sensitive adhesive

Patent metadata

Field	Value
Publication number	US-9587146-B2
Application number	US-201514950449-A
Country	US
Kind code	B2
Filing date	Nov 24, 2015
Priority date	Jan 11, 2008
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

Optically clear stretch releasing pressure sensitive adhesive films containing a silicone pressure sensitive adhesive composition and a tacky tab are provided. The pressure sensitive adhesive compositions are formed from elastomeric silicone polymer selected from the group consisting of urea-based silicone copolymers, oxamide-based silicone copolymers, amide-based silicone copolymers, urethane-based silicone copolymers, polydiorganosiloxane polymers, or mixtures of these copolymers. The pressure sensitive adhesive compositions may also contain an MQ tackifying resin. The pressure sensitive adhesive compositions may be used to form adhesive articles.

First claim

What is claimed is:

1. A method for removably bonding an assembly comprising:
providing a first substrate;
disposing a stretch releasing pressure sensitive adhesive film on at least a portion of the surface of the substrate, wherein the stretch releasing pressure sensitive adhesive film comprises:
a silicone pressure sensitive adhesive composition;
and a tacky tab consisting of the silicone pressure sensitive adhesive; and

contacting a second substrate with the stretch releasing pressure sensitive adhesive such that the second substrate is bonded to first substrate through the stretch releasing pressure sensitive adhesive and the tacky tab is available for grasping by a user.

2. The method of claim 1 wherein disposing a stretch releasing pressure sensitive adhesive film on at least a portion of the surface of the substrate comprises coating of the adhesive composition onto the substrate.

3. The method of claim 1 wherein disposing a stretch releasing pressure sensitive adhesive film on at least a portion of the surface of the substrate comprises laminating of an adhesive article onto the substrate, wherein the adhesive article comprises a release liner with the stretch releasing pressure sensitive adhesive film composition coated onto it.

4. The method of claim 3 wherein the release liner comprises a microstructured surface in contact with the stretch releasing pressure sensitive adhesive tape composition.

5. The method of claim 1 wherein the stretch releasing pressure sensitive adhesive film comprises a single layer.

6. The method of claim 1 wherein the stretch releasing pressure sensitive adhesive film comprises an optically clear adhesive.

7. The method of claim 1 further comprising stretch releasing the pressure sensitive adhesive film from the first and/or second substrates by grasping the tacky tab and stretching.

8. The method of claim 7 wherein grasping the tacky tab further comprises adhering a collection tool to the tacky tab.

9. The method of claim 8 wherein the collection tool comprises a plastic tool, a metal tool, a cardboard tool, a wooden tool or a ceramic tool.

10. The method of claim 1 wherein the stretch releasing pressure sensitive adhesive film further comprises additional extensible layers wherein at least one of the additional extensible layers comprises a pressure sensitive adhesive or an elastomer.

Assignees

• 3M Innovative Properties Co
• 3M Innovative Properties Co

Inventors

• Sherman Audrey A
• Tapio Scott M
• Winkler Wendy J

Classifications

• Y10T428/28

  Web or sheet containing structurally defined element or component and having an adhesive outermost layer · CPC title

• C09J2201/618

  Chemistry & Metallurgy · mapped topic

• C09J183/04 Primary

  Polysiloxanes · CPC title

• C09J2483/00

  Presence of polysiloxane · CPC title

• C09J7/0225

  Chemistry & Metallurgy · mapped topic