Curable isobutylene adhesive copolymers

• US 9,631,126 B2
• Filed: 08/25/2014
• Issued: 04/25/2017
• Est. Priority Date: 08/28/2013
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Lee, Hae-Seung, Dire, Abdujabar K., Caldwell, Gregg A.
• Primary Examiner(s): ZIMMER, MARC S
• Application Number:
  US14/913,386
• Publication Number:
  US 20160200949A1
• Time in Patent Office: 974 Days
• Field of Search: None
• CPC Class Codes: B32B 2250/02 2 layers
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2457/202 LCD, i.e. liquid crystal displays
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C08L 23/22 Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
• CPC Class Codes: C08L 2312/08 by silane
• CPC Class Codes: C09J 11/08 Macromolecular additives
• CPC Class Codes: C09J 119/006 Rubber characterised by functional groups, e.g. telechelic diene polymers
• CPC Class Codes: C09J 123/26 modified by chemical after-treatment
• CPC Class Codes: C09J 2415/00 Presence of rubber derivatives
• CPC Class Codes: C09J 5/00 Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
• CPC Class Codes: C09J 7/383 Natural or synthetic rubber
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: H05K 1/0274 Optical details, e.g. printed circuits comprising integral optical means H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42
• CPC Class Codes: H05K 1/0296 Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295 H05K1/11 takes precedence; lay-out adapted to mounted component configuration H05K1/18
• CPC Class Codes: H05K 1/09 Use of materials for the conductive, e.g. metallic pattern
• CPC Class Codes: H05K 3/386 by the use of an organic polymeric bonding layer, e.g. adhesive
• CPC Class Codes: H05K 3/4611 by laminating two or more circuit boards H05K3/4652 takes precedence

Abstract

The disclosure provides pressure-sensitive adhesives and adhesive sealants prepared from alkoxysilane modified, crosslinked isobutylene copolymers, and tape articles prepared therefrom. The adhesive is particularly useful in bonding optical displays.

Claims

1. An article comprising:

an optically clear first substrate having an electro-conductive trace;

an optically clear pressure sensitive adhesive disposed on the first substrate and in contact with the trace, the adhesive comprising

a) a substituted isobutylene copolymer of the formula;

2. The article of claim 1, further comprising an optically clear second substrate disposed on the adhesive.

3. The article of claim 2, wherein the first and second substrates are selected from the group consisting of plastic, polymeric film, and glass.

4. The article of claim 2, integrated into an electronic device selected from the group consisting of LCD panel, cell phone, hand held device, and a laptop computer.

5. The article of claim 2 where the electroconductive trace is selected from indium-tin oxide, gold, silver, copper or aluminum.

6. The article of claim 1 wherein the isobutylene copolymer comprises greater than 0% by weight but less than 20% by weight of polymerized monomer units having pendent alkoxysilane groups.

7. The article of claim 1 wherein the adhesive comprises 1 to 50 wt. % tackifier, relative to the total weight of the composition.

8. The article of claim 1 wherein the adhesive further comprises a non-functionalized poly(isobutylene) polymer.

9. The article of claim 8 wherein the adhesive comprises:

a) greater than 30 wt. % isobutylene copolymer having pendent alkoxysilane groups;

b) 1 to 50 wt. % of tackifier; and

c) 10 to 50 wt. % non-functional isobutylene (co)polymers.

10. A method of making an article of claim 1 comprising the steps of:

providing an optically clear first substrate having an electro-conductive trace;

providing the pressure sensitive adhesive of claim 1; and

laminating the pressure sensitive adhesive to the first substrate such that the optically clear adhesive is in contact with the electro-conductive trace, wherein the adhesive comprises

a) a substituted isobutylene copolymer of the formula;

11. The method of claim 10 where the electroconductive trace is selected from indium-tin oxide, gold, silver, copper or aluminum.