Curable isobutylene adhesive copolymers

Patent metadata

Field	Value
Publication number	US-2016200949-A1
Application number	US-201414913386-A
Country	US
Kind code	A1
Filing date	Aug 25, 2014
Priority date	Aug 28, 2013
Publication date	Jul 14, 2016
Grant date	—

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

1 . A curable isobutylene copolymer composition 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 CH3;
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 . (canceled)

3 . The curable isobutylene copolymer of claim 1 comprising greater than 0% by weight but less than 20% by weight of polymerized monomer units having pendent alkoxysilane groups.

4 . (canceled)

5 . The curable isobutylene copolymer composition of claim 1 comprising 1 to 50 wt. % tackifier, relative to the total weight of the composition.

6 . (canceled)

7 . The curable isobutylene copolymer composition of claim 1 further comprising a non-functionalized poly(isobutylene) polymer.

8 . The curable isobutylene copolymer composition of claim 1 comprising
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.

9 . The crosslinked curable isobutylene copolymer composition of claim 1 .

10 . (canceled)

11 . An adhesive article comprising a crosslinked coating of the curable isobutylene copolymer of claim 9 on a backing.

12 . The curable isobutylene copolymer composition claim 1 comprising 10 to 50 wt. % of said tackifier relative to the total weight of the composition.

13 . (canceled)

14 . (canceled)

15 . The curable composition of claim 1 wherein the substituted isobutylene copolymer is prepared by the free radical addition of mercaptosilane to an isobutylene copolymer.

16 . The curable composition of claim 15 wherein the mercaptosilane is of the formula:
HS—R 2 Si(OR 3 )x(R 3 ) 3-x ] q

wherein
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.

17 . An optically clear laminate comprising:
a first substrate having at least one major surface; a second substrate having at least one major surface; and the adhesive composition of claim 1 disposed between and in contact with at least one major surface of the first substrate and at least one major surface of the second substrate.

18 . The optical clear laminate of claim 17 wherein the laminate has an average transmissivity between 450 nanometers and 650 nanometers of greater than about 85%.

19 . An article comprising:
an optically clear first substrate having an electro-conductive trace;
the optically clear pressure sensitive adhesive of claim 1 disposed on the first substrate and in contact with the trace.

20 . The article of claim 19 , further comprising an optically clear second substrate disposed on the adhesive.

21 . The article of claim 20 , wherein the first and second substrates are selected from the group consisting of plastic, polymeric film, and glass.

22 . The article of claim 20 , integrated into an electronic device selected from the group consisting of LCD panel, cell phone, hand held device, and a laptop computer.

23 . The article of claim 20 where the electroconductive trace is selected from indium-tin oxide, gold, silver, copper or aluminum.

24 . A method of making an article 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.

25 . The method of claim 24 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

• H05K1/09

  Use of materials for the {conductive, e.g. } metallic pattern · CPC title

• B32B2457/00

  Electrical equipment · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · 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