Curable isobutylene adhesive copolymers

Patent metadata

Field	Value
Publication number	US-9631126-B2
Application number	US-201414913386-A
Country	US
Kind code	B2
Filing date	Aug 25, 2014
Priority date	Aug 28, 2013
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

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.

First claim

We claim:

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:

wherein a is at least 20, b is at least 1 and c may be zero;
R 1 is H or CH 3 ;
R 2 is a multivalent saturated or unsaturated alkylene or arylene, each R 3 is an alkyl group or aryl group, x is 1 to 3, and q is 1 or 2, and
b) a tackifier.

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:

wherein a is at least 20, b is at least 1 and c may be zero;
R 1 is H or CH 3 ;
R 2 is a multivalent saturated or unsaturated alkylene or arylene, each R 3 is an alkyl group or aryl group, x is 1 to 3, and q is 1 or 2, and
b) a tackifier.

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

Assignees

• 3M Innovative Properties Co

Inventors

• Lee Hae-Seung
• Dire Abdujabar K
• Caldwell Gregg A

Classifications

• C09J2415/00

  Presence of rubber derivatives · CPC title

• H05K1/0274

  Optical details, e.g. printed circuits comprising integral optical means (H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42) · CPC title

• C09J119/006 Primary

  Rubber characterised by functional groups, e.g. telechelic diene polymers · CPC title

• H05K3/386

  by the use of an organic polymeric bonding layer, e.g. adhesive · CPC title

• C09J123/26 Primary

  modified by chemical after-treatment · CPC title