Barrier adhesive mass with polymer getter material

Patent metadata

Field	Value
Publication number	US-10633563-B2
Application number	US-201615770424-A
Country	US
Kind code	B2
Filing date	Oct 25, 2016
Priority date	Nov 9, 2015
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

The invention relates to a barrier adhesive mass having high breakthrough times for water and also providing a good adhesive performance. This is achieved by a barrier adhesive mass comprising at least one elastomer and at least one reactive resin, and is characterised in that the barrier adhesive mass comprises at least one polymer G containing at least two functions suitable for constructing a polymer, as well as at least two hydrolysable silyl groups. The invention also relates to an adhesive tape comprising a barrier adhesive mass according to the invention, and to the use of an adhesive mass of this type for sealing electronic assemblies.

First claim

The invention claimed is:

1. A barrier adhesive compound, comprising
at least one elastomer and
at least one reactive resin,
wherein;
the barrier adhesive compound comprises at least one polymer G, containing at least two functional groups capable of building a polymer and at least two hydrolyzable silyl groups.

2. The barrier adhesive compound of claim 1 , wherein the at least one polymer G has a polyacrylate backbone.

3. The barrier adhesive compound of claim 1 , wherein the functional groups capable of building a polymer are selected independently of one another, and are selected from the group consisting of: vinyl groups, (meth)acrylate groups, hydroxy groups, amino groups, isocyanate groups, cyclic ether groups, and epoxy groups.

4. The barrier adhesive compound of claim 1 , wherein the functional groups capable of building a polymer are selected independently from one another, and are selected from: (meth)acrylate groups and epoxy groups.

5. The barrier adhesive compound of claim 1 , wherein the functional groups capable of building a polymer comprise epoxycycloalkyl groups.

6. The barrier adhesive compound of claim 1 , wherein the hydrolyzable silyl groups correspond to formula (I)
—Si(OR 1 ) x R 2 3-x   (I),

in which:
R 1 is a methyl and/or an ethyl residue; and,
R 2 , is an alkyl and/or an aryl residue; and,
x=1 to 3.

7. The barrier adhesive compound of claim 6 , wherein each R 1 is an ethyl residue.

8. The barrier adhesive compound of claim 6 , wherein x=2 or 3.

9. The barrier adhesive compound of claim 1 , wherein the at least one elastomer is a vinyl aromatic block copolymer.

10. The barrier adhesive compound of claim 1 , wherein the at least one reactive resin contains cyclic ether groups.

11. The barrier adhesive of claim 1 which contains 15-80% wt. of a reactive resin based on the total weight of the barrier adhesive compound.

12. The barrier adhesive compound of claim 1 , wherein the barrier adhesive compound is a pressure-sensitive adhesive compound.

13. An adhesive tape, comprising a barrier adhesive compound of claim 12 .

14. A method of sealing of electronic devices comprising the step of:
applying the barrier adhesive compound of claim 1 to a surface of the electronic device.

Assignees

• Tesa Se

Inventors

• Rompf Julia
• Schuh Christian
• Recher Martin
• Cao Mengwei

Classifications

• C08L43/04

  Homopolymers or copolymers of monomers containing silicon · CPC title

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C09J2467/006

  in the substrate · CPC title

• C09J5/00

  Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers · CPC title

• C09J7/381

  based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds · CPC title